diff --git a/circuits/circomlib/babyjub.circom b/circuits/circomlib/babyjub.circom
new file mode 100644
index 0000000..36810fe
--- /dev/null
+++ b/circuits/circomlib/babyjub.circom
@@ -0,0 +1,107 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+pragma circom 2.0.0;
+
+include "bitify.circom";
+include "escalarmulfix.circom";
+
+template BabyAdd() {
+    signal input x1;
+    signal input y1;
+    signal input x2;
+    signal input y2;
+    signal output xout;
+    signal output yout;
+
+    signal beta;
+    signal gamma;
+    signal delta;
+    signal tau;
+
+    var a = 168700;
+    var d = 168696;
+
+    beta <== x1*y2;
+    gamma <== y1*x2;
+    delta <== (-a*x1+y1)*(x2 + y2);
+    tau <== beta * gamma;
+
+    xout <-- (beta + gamma) / (1+ d*tau);
+    (1+ d*tau) * xout === (beta + gamma);
+
+    yout <-- (delta + a*beta - gamma) / (1-d*tau);
+    (1-d*tau)*yout === (delta + a*beta - gamma);
+}
+
+template BabyDbl() {
+    signal input x;
+    signal input y;
+    signal output xout;
+    signal output yout;
+
+    component adder = BabyAdd();
+    adder.x1 <== x;
+    adder.y1 <== y;
+    adder.x2 <== x;
+    adder.y2 <== y;
+
+    adder.xout ==> xout;
+    adder.yout ==> yout;
+}
+
+
+template BabyCheck() {
+    signal input x;
+    signal input y;
+
+    signal x2;
+    signal y2;
+
+    var a = 168700;
+    var d = 168696;
+
+    x2 <== x*x;
+    y2 <== y*y;
+
+    a*x2 + y2 === 1 + d*x2*y2;
+}
+
+// Extracts the public key from private key
+template BabyPbk() {
+    signal input  in;
+    signal output Ax;
+    signal output Ay;
+
+    var BASE8[2] = [
+        5299619240641551281634865583518297030282874472190772894086521144482721001553,
+        16950150798460657717958625567821834550301663161624707787222815936182638968203
+    ];
+
+    component pvkBits = Num2Bits(253);
+    pvkBits.in <== in;
+
+    component mulFix = EscalarMulFix(253, BASE8);
+
+    var i;
+    for (i=0; i<253; i++) {
+        mulFix.e[i] <== pvkBits.out[i];
+    }
+    Ax  <== mulFix.out[0];
+    Ay  <== mulFix.out[1];
+}
diff --git a/circuits/circomlib/escalarmulany.circom b/circuits/circomlib/escalarmulany.circom
new file mode 100644
index 0000000..f07fe7d
--- /dev/null
+++ b/circuits/circomlib/escalarmulany.circom
@@ -0,0 +1,197 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+pragma circom 2.0.0;
+
+include "montgomery.circom";
+include "babyjub.circom";
+include "comparators.circom";
+
+template Multiplexor2() {
+    signal input sel;
+    signal input in[2][2];
+    signal output out[2];
+
+    out[0] <== (in[1][0] - in[0][0])*sel + in[0][0];
+    out[1] <== (in[1][1] - in[0][1])*sel + in[0][1];
+}
+
+template BitElementMulAny() {
+    signal input sel;
+    signal input dblIn[2];
+    signal input addIn[2];
+    signal output dblOut[2];
+    signal output addOut[2];
+
+    component doubler = MontgomeryDouble();
+    component adder = MontgomeryAdd();
+    component selector = Multiplexor2();
+
+
+    sel ==> selector.sel;
+
+    dblIn[0] ==> doubler.in[0];
+    dblIn[1] ==> doubler.in[1];
+    doubler.out[0] ==> adder.in1[0];
+    doubler.out[1] ==> adder.in1[1];
+    addIn[0] ==> adder.in2[0];
+    addIn[1] ==> adder.in2[1];
+    addIn[0] ==> selector.in[0][0];
+    addIn[1] ==> selector.in[0][1];
+    adder.out[0] ==> selector.in[1][0];
+    adder.out[1] ==> selector.in[1][1];
+
+    doubler.out[0] ==> dblOut[0];
+    doubler.out[1] ==> dblOut[1];
+    selector.out[0] ==> addOut[0];
+    selector.out[1] ==> addOut[1];
+}
+
+// p is montgomery point
+// n must be <= 248
+// returns out in twisted edwards
+// Double is in montgomery to be linked;
+
+template SegmentMulAny(n) {
+    signal input e[n];
+    signal input p[2];
+    signal output out[2];
+    signal output dbl[2];
+
+    component bits[n-1];
+
+    component e2m = Edwards2Montgomery();
+
+    p[0] ==> e2m.in[0];
+    p[1] ==> e2m.in[1];
+
+    var i;
+
+    bits[0] = BitElementMulAny();
+    e2m.out[0] ==> bits[0].dblIn[0];
+    e2m.out[1] ==> bits[0].dblIn[1];
+    e2m.out[0] ==> bits[0].addIn[0];
+    e2m.out[1] ==> bits[0].addIn[1];
+    e[1] ==> bits[0].sel;
+
+    for (i=1; i<n-1; i++) {
+        bits[i] = BitElementMulAny();
+
+        bits[i-1].dblOut[0] ==> bits[i].dblIn[0];
+        bits[i-1].dblOut[1] ==> bits[i].dblIn[1];
+        bits[i-1].addOut[0] ==> bits[i].addIn[0];
+        bits[i-1].addOut[1] ==> bits[i].addIn[1];
+        e[i+1] ==> bits[i].sel;
+    }
+
+    bits[n-2].dblOut[0] ==> dbl[0];
+    bits[n-2].dblOut[1] ==> dbl[1];
+
+    component m2e = Montgomery2Edwards();
+
+    bits[n-2].addOut[0] ==> m2e.in[0];
+    bits[n-2].addOut[1] ==> m2e.in[1];
+
+    component eadder = BabyAdd();
+
+    m2e.out[0] ==> eadder.x1;
+    m2e.out[1] ==> eadder.y1;
+    -p[0] ==> eadder.x2;
+    p[1] ==> eadder.y2;
+
+    component lastSel = Multiplexor2();
+
+    e[0] ==> lastSel.sel;
+    eadder.xout ==> lastSel.in[0][0];
+    eadder.yout ==> lastSel.in[0][1];
+    m2e.out[0] ==> lastSel.in[1][0];
+    m2e.out[1] ==> lastSel.in[1][1];
+
+    lastSel.out[0] ==> out[0];
+    lastSel.out[1] ==> out[1];
+}
+
+// This function assumes that p is in the subgroup and it is different to 0
+
+template EscalarMulAny(n) {
+    signal input e[n];              // Input in binary format
+    signal input p[2];              // Point (Twisted format)
+    signal output out[2];           // Point (Twisted format)
+
+    var nsegments = (n-1)\148 +1;
+    var nlastsegment = n - (nsegments-1)*148;
+
+    component segments[nsegments];
+    component doublers[nsegments-1];
+    component m2e[nsegments-1];
+    component adders[nsegments-1];
+    component zeropoint = IsZero();
+    zeropoint.in <== p[0];
+
+    var s;
+    var i;
+    var nseg;
+
+    for (s=0; s<nsegments; s++) {
+
+        nseg = (s < nsegments-1) ? 148 : nlastsegment;
+
+        segments[s] = SegmentMulAny(nseg);
+
+        for (i=0; i<nseg; i++) {
+            e[s*148+i] ==> segments[s].e[i];
+        }
+
+        if (s==0) {
+            // force G8 point if input point is zero
+            segments[s].p[0] <== p[0] + (5299619240641551281634865583518297030282874472190772894086521144482721001553 - p[0])*zeropoint.out;
+            segments[s].p[1] <== p[1] + (16950150798460657717958625567821834550301663161624707787222815936182638968203 - p[1])*zeropoint.out;
+        } else {
+            doublers[s-1] = MontgomeryDouble();
+            m2e[s-1] = Montgomery2Edwards();
+            adders[s-1] = BabyAdd();
+
+            segments[s-1].dbl[0] ==> doublers[s-1].in[0];
+            segments[s-1].dbl[1] ==> doublers[s-1].in[1];
+
+            doublers[s-1].out[0] ==> m2e[s-1].in[0];
+            doublers[s-1].out[1] ==> m2e[s-1].in[1];
+
+            m2e[s-1].out[0] ==> segments[s].p[0];
+            m2e[s-1].out[1] ==> segments[s].p[1];
+
+            if (s==1) {
+                segments[s-1].out[0] ==> adders[s-1].x1;
+                segments[s-1].out[1] ==> adders[s-1].y1;
+            } else {
+                adders[s-2].xout ==> adders[s-1].x1;
+                adders[s-2].yout ==> adders[s-1].y1;
+            }
+            segments[s].out[0] ==> adders[s-1].x2;
+            segments[s].out[1] ==> adders[s-1].y2;
+        }
+    }
+
+    if (nsegments == 1) {
+        segments[0].out[0]*(1-zeropoint.out) ==> out[0];
+        segments[0].out[1]+(1-segments[0].out[1])*zeropoint.out ==> out[1];
+    } else {
+        adders[nsegments-2].xout*(1-zeropoint.out) ==> out[0];
+        adders[nsegments-2].yout+(1-adders[nsegments-2].yout)*zeropoint.out ==> out[1];
+    }
+}
diff --git a/circuits/circomlib/escalarmulfix.circom b/circuits/circomlib/escalarmulfix.circom
new file mode 100644
index 0000000..4669d36
--- /dev/null
+++ b/circuits/circomlib/escalarmulfix.circom
@@ -0,0 +1,299 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+pragma circom 2.0.0;
+
+include "mux3.circom";
+include "montgomery.circom";
+include "babyjub.circom";
+
+/*
+    Window of 3 elements, it calculates
+        out = base + base*in[0] + 2*base*in[1] + 4*base*in[2]
+        out4 = 4*base
+
+    The result should be compensated.
+ */
+
+/*
+
+    The scalar is s = a0 + a1*2^3 + a2*2^6 + ...... + a81*2^243
+    First We calculate Q = B + 2^3*B + 2^6*B + ......... + 2^246*B
+
+    Then we calculate S1 = 2*2^246*B + (1 + a0)*B + (2^3 + a1)*B + .....+ (2^243 + a81)*B
+
+    And Finaly we compute the result: RES = SQ - Q
+
+    As you can see the input of the adders cannot be equal nor zero, except for the last
+    substraction that it's done in montgomery.
+
+    A good way to see it is that the accumulator input of the adder >= 2^247*B and the other input
+    is the output of the windows that it's going to be <= 2^246*B
+ */
+template WindowMulFix() {
+    signal input in[3];
+    signal input base[2];
+    signal output out[2];
+    signal output out8[2];   // Returns 8*Base (To be linked)
+
+    component mux = MultiMux3(2);
+
+    mux.s[0] <== in[0];
+    mux.s[1] <== in[1];
+    mux.s[2] <== in[2];
+
+    component dbl2 = MontgomeryDouble();
+    component adr3 = MontgomeryAdd();
+    component adr4 = MontgomeryAdd();
+    component adr5 = MontgomeryAdd();
+    component adr6 = MontgomeryAdd();
+    component adr7 = MontgomeryAdd();
+    component adr8 = MontgomeryAdd();
+
+// in[0]  -> 1*BASE
+
+    mux.c[0][0] <== base[0];
+    mux.c[1][0] <== base[1];
+
+// in[1] -> 2*BASE
+    dbl2.in[0] <== base[0];
+    dbl2.in[1] <== base[1];
+    mux.c[0][1] <== dbl2.out[0];
+    mux.c[1][1] <== dbl2.out[1];
+
+// in[2] -> 3*BASE
+    adr3.in1[0] <== base[0];
+    adr3.in1[1] <== base[1];
+    adr3.in2[0] <== dbl2.out[0];
+    adr3.in2[1] <== dbl2.out[1];
+    mux.c[0][2] <== adr3.out[0];
+    mux.c[1][2] <== adr3.out[1];
+
+// in[3] -> 4*BASE
+    adr4.in1[0] <== base[0];
+    adr4.in1[1] <== base[1];
+    adr4.in2[0] <== adr3.out[0];
+    adr4.in2[1] <== adr3.out[1];
+    mux.c[0][3] <== adr4.out[0];
+    mux.c[1][3] <== adr4.out[1];
+
+// in[4] -> 5*BASE
+    adr5.in1[0] <== base[0];
+    adr5.in1[1] <== base[1];
+    adr5.in2[0] <== adr4.out[0];
+    adr5.in2[1] <== adr4.out[1];
+    mux.c[0][4] <== adr5.out[0];
+    mux.c[1][4] <== adr5.out[1];
+
+// in[5] -> 6*BASE
+    adr6.in1[0] <== base[0];
+    adr6.in1[1] <== base[1];
+    adr6.in2[0] <== adr5.out[0];
+    adr6.in2[1] <== adr5.out[1];
+    mux.c[0][5] <== adr6.out[0];
+    mux.c[1][5] <== adr6.out[1];
+
+// in[6] -> 7*BASE
+    adr7.in1[0] <== base[0];
+    adr7.in1[1] <== base[1];
+    adr7.in2[0] <== adr6.out[0];
+    adr7.in2[1] <== adr6.out[1];
+    mux.c[0][6] <== adr7.out[0];
+    mux.c[1][6] <== adr7.out[1];
+
+// in[7] -> 8*BASE
+    adr8.in1[0] <== base[0];
+    adr8.in1[1] <== base[1];
+    adr8.in2[0] <== adr7.out[0];
+    adr8.in2[1] <== adr7.out[1];
+    mux.c[0][7] <== adr8.out[0];
+    mux.c[1][7] <== adr8.out[1];
+
+    out8[0] <== adr8.out[0];
+    out8[1] <== adr8.out[1];
+
+    out[0] <== mux.out[0];
+    out[1] <== mux.out[1];
+}
+
+
+/*
+    This component does a multiplication of a escalar times a fix base
+    Signals:
+        e: The scalar in bits
+        base: the base point in edwards format
+        out:  The result
+        dbl: Point in Edwards to be linked to the next segment.
+ */
+
+template SegmentMulFix(nWindows) {
+    signal input e[nWindows*3];
+    signal input base[2];
+    signal output out[2];
+    signal output dbl[2];
+
+    var i;
+    var j;
+
+    // Convert the base to montgomery
+
+    component e2m = Edwards2Montgomery();
+    e2m.in[0] <== base[0];
+    e2m.in[1] <== base[1];
+
+    component windows[nWindows];
+    component adders[nWindows];
+    component cadders[nWindows];
+
+    // In the last step we add an extra doubler so that numbers do not match.
+    component dblLast = MontgomeryDouble();
+
+    for (i=0; i<nWindows; i++) {
+        windows[i] = WindowMulFix();
+        cadders[i] = MontgomeryAdd();
+        if (i==0) {
+            windows[i].base[0] <== e2m.out[0];
+            windows[i].base[1] <== e2m.out[1];
+            cadders[i].in1[0] <== e2m.out[0];
+            cadders[i].in1[1] <== e2m.out[1];
+        } else {
+            windows[i].base[0] <== windows[i-1].out8[0];
+            windows[i].base[1] <== windows[i-1].out8[1];
+            cadders[i].in1[0] <== cadders[i-1].out[0];
+            cadders[i].in1[1] <== cadders[i-1].out[1];
+        }
+        for (j=0; j<3; j++) {
+            windows[i].in[j] <== e[3*i+j];
+        }
+        if (i<nWindows-1) {
+            cadders[i].in2[0] <== windows[i].out8[0];
+            cadders[i].in2[1] <== windows[i].out8[1];
+        } else {
+            dblLast.in[0] <== windows[i].out8[0];
+            dblLast.in[1] <== windows[i].out8[1];
+            cadders[i].in2[0] <== dblLast.out[0];
+            cadders[i].in2[1] <== dblLast.out[1];
+        }
+    }
+
+    for (i=0; i<nWindows; i++) {
+        adders[i] = MontgomeryAdd();
+        if (i==0) {
+            adders[i].in1[0] <== dblLast.out[0];
+            adders[i].in1[1] <== dblLast.out[1];
+        } else {
+            adders[i].in1[0] <== adders[i-1].out[0];
+            adders[i].in1[1] <== adders[i-1].out[1];
+        }
+        adders[i].in2[0] <== windows[i].out[0];
+        adders[i].in2[1] <== windows[i].out[1];
+    }
+
+    component m2e = Montgomery2Edwards();
+    component cm2e = Montgomery2Edwards();
+
+    m2e.in[0] <== adders[nWindows-1].out[0];
+    m2e.in[1] <== adders[nWindows-1].out[1];
+    cm2e.in[0] <== cadders[nWindows-1].out[0];
+    cm2e.in[1] <== cadders[nWindows-1].out[1];
+
+    component cAdd = BabyAdd();
+    cAdd.x1 <== m2e.out[0];
+    cAdd.y1 <== m2e.out[1];
+    cAdd.x2 <== -cm2e.out[0];
+    cAdd.y2 <== cm2e.out[1];
+
+    cAdd.xout ==> out[0];
+    cAdd.yout ==> out[1];
+
+    windows[nWindows-1].out8[0] ==> dbl[0];
+    windows[nWindows-1].out8[1] ==> dbl[1];
+}
+
+
+/*
+This component multiplies a escalar times a fixed point BASE (twisted edwards format)
+    Signals
+        e: The escalar in binary format
+        out: The output point in twisted edwards
+ */
+template EscalarMulFix(n, BASE) {
+    signal input e[n];              // Input in binary format
+    signal output out[2];           // Point (Twisted format)
+
+    var nsegments = (n-1)\246 +1;       // 249 probably would work. But I'm not sure and for security I keep 246
+    var nlastsegment = n - (nsegments-1)*249;
+
+    component segments[nsegments];
+
+    component m2e[nsegments-1];
+    component adders[nsegments-1];
+
+    var s;
+    var i;
+    var nseg;
+    var nWindows;
+
+    for (s=0; s<nsegments; s++) {
+
+        nseg = (s < nsegments-1) ? 249 : nlastsegment;
+        nWindows = ((nseg - 1)\3)+1;
+
+        segments[s] = SegmentMulFix(nWindows);
+
+        for (i=0; i<nseg; i++) {
+            segments[s].e[i] <== e[s*249+i];
+        }
+
+        for (i = nseg; i<nWindows*3; i++) {
+            segments[s].e[i] <== 0;
+        }
+
+        if (s==0) {
+            segments[s].base[0] <== BASE[0];
+            segments[s].base[1] <== BASE[1];
+        } else {
+            m2e[s-1] = Montgomery2Edwards();
+            adders[s-1] = BabyAdd();
+
+            segments[s-1].dbl[0] ==> m2e[s-1].in[0];
+            segments[s-1].dbl[1] ==> m2e[s-1].in[1];
+
+            m2e[s-1].out[0] ==> segments[s].base[0];
+            m2e[s-1].out[1] ==> segments[s].base[1];
+
+            if (s==1) {
+                segments[s-1].out[0] ==> adders[s-1].x1;
+                segments[s-1].out[1] ==> adders[s-1].y1;
+            } else {
+                adders[s-2].xout ==> adders[s-1].x1;
+                adders[s-2].yout ==> adders[s-1].y1;
+            }
+            segments[s].out[0] ==> adders[s-1].x2;
+            segments[s].out[1] ==> adders[s-1].y2;
+        }
+    }
+
+    if (nsegments == 1) {
+        segments[0].out[0] ==> out[0];
+        segments[0].out[1] ==> out[1];
+    } else {
+        adders[nsegments-2].xout ==> out[0];
+        adders[nsegments-2].yout ==> out[1];
+    }
+}
diff --git a/circuits/circomlib/mimc.circom b/circuits/circomlib/mimc.circom
new file mode 100644
index 0000000..1f963a9
--- /dev/null
+++ b/circuits/circomlib/mimc.circom
@@ -0,0 +1,156 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+pragma circom 2.0.0;
+
+template MiMC7(nrounds) {
+    signal input x_in;
+    signal input k;
+    signal output out;
+
+    var c[91] = [
+        0,
+        20888961410941983456478427210666206549300505294776164667214940546594746570981,
+        15265126113435022738560151911929040668591755459209400716467504685752745317193,
+        8334177627492981984476504167502758309043212251641796197711684499645635709656,
+        1374324219480165500871639364801692115397519265181803854177629327624133579404,
+        11442588683664344394633565859260176446561886575962616332903193988751292992472,
+        2558901189096558760448896669327086721003508630712968559048179091037845349145,
+        11189978595292752354820141775598510151189959177917284797737745690127318076389,
+        3262966573163560839685415914157855077211340576201936620532175028036746741754,
+        17029914891543225301403832095880481731551830725367286980611178737703889171730,
+        4614037031668406927330683909387957156531244689520944789503628527855167665518,
+        19647356996769918391113967168615123299113119185942498194367262335168397100658,
+        5040699236106090655289931820723926657076483236860546282406111821875672148900,
+        2632385916954580941368956176626336146806721642583847728103570779270161510514,
+        17691411851977575435597871505860208507285462834710151833948561098560743654671,
+        11482807709115676646560379017491661435505951727793345550942389701970904563183,
+        8360838254132998143349158726141014535383109403565779450210746881879715734773,
+        12663821244032248511491386323242575231591777785787269938928497649288048289525,
+        3067001377342968891237590775929219083706800062321980129409398033259904188058,
+        8536471869378957766675292398190944925664113548202769136103887479787957959589,
+        19825444354178182240559170937204690272111734703605805530888940813160705385792,
+        16703465144013840124940690347975638755097486902749048533167980887413919317592,
+        13061236261277650370863439564453267964462486225679643020432589226741411380501,
+        10864774797625152707517901967943775867717907803542223029967000416969007792571,
+        10035653564014594269791753415727486340557376923045841607746250017541686319774,
+        3446968588058668564420958894889124905706353937375068998436129414772610003289,
+        4653317306466493184743870159523234588955994456998076243468148492375236846006,
+        8486711143589723036499933521576871883500223198263343024003617825616410932026,
+        250710584458582618659378487568129931785810765264752039738223488321597070280,
+        2104159799604932521291371026105311735948154964200596636974609406977292675173,
+        16313562605837709339799839901240652934758303521543693857533755376563489378839,
+        6032365105133504724925793806318578936233045029919447519826248813478479197288,
+        14025118133847866722315446277964222215118620050302054655768867040006542798474,
+        7400123822125662712777833064081316757896757785777291653271747396958201309118,
+        1744432620323851751204287974553233986555641872755053103823939564833813704825,
+        8316378125659383262515151597439205374263247719876250938893842106722210729522,
+        6739722627047123650704294650168547689199576889424317598327664349670094847386,
+        21211457866117465531949733809706514799713333930924902519246949506964470524162,
+        13718112532745211817410303291774369209520657938741992779396229864894885156527,
+        5264534817993325015357427094323255342713527811596856940387954546330728068658,
+        18884137497114307927425084003812022333609937761793387700010402412840002189451,
+        5148596049900083984813839872929010525572543381981952060869301611018636120248,
+        19799686398774806587970184652860783461860993790013219899147141137827718662674,
+        19240878651604412704364448729659032944342952609050243268894572835672205984837,
+        10546185249390392695582524554167530669949955276893453512788278945742408153192,
+        5507959600969845538113649209272736011390582494851145043668969080335346810411,
+        18177751737739153338153217698774510185696788019377850245260475034576050820091,
+        19603444733183990109492724100282114612026332366576932662794133334264283907557,
+        10548274686824425401349248282213580046351514091431715597441736281987273193140,
+        1823201861560942974198127384034483127920205835821334101215923769688644479957,
+        11867589662193422187545516240823411225342068709600734253659804646934346124945,
+        18718569356736340558616379408444812528964066420519677106145092918482774343613,
+        10530777752259630125564678480897857853807637120039176813174150229243735996839,
+        20486583726592018813337145844457018474256372770211860618687961310422228379031,
+        12690713110714036569415168795200156516217175005650145422920562694422306200486,
+        17386427286863519095301372413760745749282643730629659997153085139065756667205,
+        2216432659854733047132347621569505613620980842043977268828076165669557467682,
+        6309765381643925252238633914530877025934201680691496500372265330505506717193,
+        20806323192073945401862788605803131761175139076694468214027227878952047793390,
+        4037040458505567977365391535756875199663510397600316887746139396052445718861,
+        19948974083684238245321361840704327952464170097132407924861169241740046562673,
+        845322671528508199439318170916419179535949348988022948153107378280175750024,
+        16222384601744433420585982239113457177459602187868460608565289920306145389382,
+        10232118865851112229330353999139005145127746617219324244541194256766741433339,
+        6699067738555349409504843460654299019000594109597429103342076743347235369120,
+        6220784880752427143725783746407285094967584864656399181815603544365010379208,
+        6129250029437675212264306655559561251995722990149771051304736001195288083309,
+        10773245783118750721454994239248013870822765715268323522295722350908043393604,
+        4490242021765793917495398271905043433053432245571325177153467194570741607167,
+        19596995117319480189066041930051006586888908165330319666010398892494684778526,
+        837850695495734270707668553360118467905109360511302468085569220634750561083,
+        11803922811376367215191737026157445294481406304781326649717082177394185903907,
+        10201298324909697255105265958780781450978049256931478989759448189112393506592,
+        13564695482314888817576351063608519127702411536552857463682060761575100923924,
+        9262808208636973454201420823766139682381973240743541030659775288508921362724,
+        173271062536305557219323722062711383294158572562695717740068656098441040230,
+        18120430890549410286417591505529104700901943324772175772035648111937818237369,
+        20484495168135072493552514219686101965206843697794133766912991150184337935627,
+        19155651295705203459475805213866664350848604323501251939850063308319753686505,
+        11971299749478202793661982361798418342615500543489781306376058267926437157297,
+        18285310723116790056148596536349375622245669010373674803854111592441823052978,
+        7069216248902547653615508023941692395371990416048967468982099270925308100727,
+        6465151453746412132599596984628739550147379072443683076388208843341824127379,
+        16143532858389170960690347742477978826830511669766530042104134302796355145785,
+        19362583304414853660976404410208489566967618125972377176980367224623492419647,
+        1702213613534733786921602839210290505213503664731919006932367875629005980493,
+        10781825404476535814285389902565833897646945212027592373510689209734812292327,
+        4212716923652881254737947578600828255798948993302968210248673545442808456151,
+        7594017890037021425366623750593200398174488805473151513558919864633711506220,
+        18979889247746272055963929241596362599320706910852082477600815822482192194401,
+        13602139229813231349386885113156901793661719180900395818909719758150455500533
+    ];
+
+    var t;
+    signal t2[nrounds];
+    signal t4[nrounds];
+    signal t6[nrounds];
+    signal t7[nrounds-1];
+
+    for (var i=0; i<nrounds; i++) {
+        t = (i==0) ? k+x_in : k + t7[i-1] + c[i];
+        t2[i] <== t*t;
+        t4[i] <== t2[i]*t2[i];
+        t6[i] <== t4[i]*t2[i];
+        if (i<nrounds-1) {
+            t7[i] <== t6[i]*t;
+        } else {
+            out <== t6[i]*t + k;
+        }
+    }
+}
+
+template MultiMiMC7(nInputs, nRounds) {
+    signal input in[nInputs];
+    signal input k;
+    signal output out;
+    signal r[nInputs +1];
+
+    component mims[nInputs];
+
+    r[0] <== k;
+    for (var i=0; i<nInputs; i++) {
+        mims[i] = MiMC7(nRounds);
+        mims[i].x_in <== in[i];
+        mims[i].k <== r[i];
+        r[i+1] <== r[i] + in[i] + mims[i].out;
+    }
+
+    out <== r[nInputs];
+}
\ No newline at end of file
diff --git a/circuits/circomlib/montgomery.circom b/circuits/circomlib/montgomery.circom
new file mode 100644
index 0000000..136c123
--- /dev/null
+++ b/circuits/circomlib/montgomery.circom
@@ -0,0 +1,142 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+/*
+    Source: https://en.wikipedia.org/wiki/Montgomery_curve
+
+                1 + y       1 + y
+    [u, v] = [ -------  , ---------- ]
+                1 - y      (1 - y)x
+
+ */
+ pragma circom 2.0.0;
+
+template Edwards2Montgomery() {
+    signal input in[2];
+    signal output out[2];
+
+    out[0] <-- (1 + in[1]) / (1 - in[1]);
+    out[1] <-- out[0] / in[0];
+
+
+    out[0] * (1-in[1]) === (1 + in[1]);
+    out[1] * in[0] === out[0];
+}
+
+/*
+
+                u    u - 1
+    [x, y] = [ ---, ------- ]
+                v    u + 1
+
+ */
+template Montgomery2Edwards() {
+    signal input in[2];
+    signal output out[2];
+
+    out[0] <-- in[0] / in[1];
+    out[1] <-- (in[0] - 1) / (in[0] + 1);
+
+    out[0] * in[1] === in[0];
+    out[1] * (in[0] + 1) === in[0] - 1;
+}
+
+
+/*
+             x2 - x1
+    lamda = ---------
+             y2 - y1
+
+                                                    x3 + A + x1 + x2
+    x3 = B * lamda^2 - A - x1 -x2    =>  lamda^2 = ------------------
+                                                         B
+
+    y3 = (2*x1 + x2 + A)*lamda - B*lamda^3 - y1  =>
+
+
+    =>  y3 = lamda * ( 2*x1 + x2 + A  - x3 - A - x1 - x2)  - y1 =>
+
+    =>  y3 = lamda * ( x1 - x3 ) - y1
+
+----------
+
+             y2 - y1
+    lamda = ---------
+             x2 - x1
+
+    x3 = B * lamda^2 - A - x1 -x2
+
+    y3 = lamda * ( x1 - x3 ) - y1
+
+ */
+
+template MontgomeryAdd() {
+    signal input in1[2];
+    signal input in2[2];
+    signal output out[2];
+
+    var a = 168700;
+    var d = 168696;
+
+    var A = (2 * (a + d)) / (a - d);
+    var B = 4 / (a - d);
+
+    signal lamda;
+
+    lamda <-- (in2[1] - in1[1]) / (in2[0] - in1[0]);
+    lamda * (in2[0] - in1[0]) === (in2[1] - in1[1]);
+
+    out[0] <== B*lamda*lamda - A - in1[0] -in2[0];
+    out[1] <== lamda * (in1[0] - out[0]) - in1[1];
+}
+
+/*
+
+    x1_2 = x1*x1
+
+             3*x1_2 + 2*A*x1 + 1
+    lamda = ---------------------
+                   2*B*y1
+
+    x3 = B * lamda^2 - A - x1 -x1
+
+    y3 = lamda * ( x1 - x3 ) - y1
+
+ */
+template MontgomeryDouble() {
+    signal input in[2];
+    signal output out[2];
+
+    var a = 168700;
+    var d = 168696;
+
+    var A = (2 * (a + d)) / (a - d);
+    var B = 4 / (a - d);
+
+    signal lamda;
+    signal x1_2;
+
+    x1_2 <== in[0] * in[0];
+
+    lamda <-- (3*x1_2 + 2*A*in[0] + 1 ) / (2*B*in[1]);
+    lamda * (2*B*in[1]) === (3*x1_2 + 2*A*in[0] + 1 );
+
+    out[0] <== B*lamda*lamda - A - 2*in[0];
+    out[1] <== lamda * (in[0] - out[0]) - in[1];
+}
diff --git a/circuits/circomlib/mux3.circom b/circuits/circomlib/mux3.circom
new file mode 100644
index 0000000..4be5f7c
--- /dev/null
+++ b/circuits/circomlib/mux3.circom
@@ -0,0 +1,75 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+pragma circom 2.0.0;
+
+template MultiMux3(n) {
+    signal input c[n][8];  // Constants
+    signal input s[3];   // Selector
+    signal output out[n];
+
+    signal a210[n];
+    signal a21[n];
+    signal a20[n];
+    signal a2[n];
+
+    signal a10[n];
+    signal a1[n];
+    signal a0[n];
+    signal a[n];
+
+    // 4 constrains for the intermediary variables
+    signal  s10;
+    s10 <== s[1] * s[0];
+
+    for (var i=0; i<n; i++) {
+
+         a210[i] <==  ( c[i][ 7]-c[i][ 6]-c[i][ 5]+c[i][ 4] - c[i][ 3]+c[i][ 2]+c[i][ 1]-c[i][ 0] ) * s10;
+          a21[i] <==  ( c[i][ 6]-c[i][ 4]-c[i][ 2]+c[i][ 0] ) * s[1];
+          a20[i] <==  ( c[i][ 5]-c[i][ 4]-c[i][ 1]+c[i][ 0] ) * s[0];
+           a2[i] <==  ( c[i][ 4]-c[i][ 0] );
+
+          a10[i] <==  ( c[i][ 3]-c[i][ 2]-c[i][ 1]+c[i][ 0] ) * s10;
+           a1[i] <==  ( c[i][ 2]-c[i][ 0] ) * s[1];
+           a0[i] <==  ( c[i][ 1]-c[i][ 0] ) * s[0];
+            a[i] <==  ( c[i][ 0] );
+
+          out[i] <== ( a210[i] + a21[i] + a20[i] + a2[i] ) * s[2] +
+                     (  a10[i] +  a1[i] +  a0[i] +  a[i] );
+
+    }
+}
+
+template Mux3() {
+    var i;
+    signal input c[8];  // Constants
+    signal input s[3];   // Selector
+    signal output out;
+
+    component mux = MultiMux3(1);
+
+    for (i=0; i<8; i++) {
+        mux.c[0][i] <== c[i];
+    }
+
+    for (i=0; i<3; i++) {
+      s[i] ==> mux.s[i];
+    }
+
+    mux.out[0] ==> out;
+}
diff --git a/circuits/crypto/ecdh.circom b/circuits/crypto/ecdh.circom
new file mode 100644
index 0000000..69983a5
--- /dev/null
+++ b/circuits/crypto/ecdh.circom
@@ -0,0 +1,29 @@
+// from privacy-scaling-explorations/maci
+
+pragma circom 2.0.0;
+
+include "../circomlib/bitify.circom";
+include "../circomlib/escalarmulany.circom";
+
+template Ecdh() {
+  // Note: private key
+  // Needs to be hashed, and then pruned before
+  // supplying it to the circuit
+  signal input private_key;
+  signal input public_key[2];
+
+  signal output shared_key;
+
+  component privBits = Num2Bits(253);
+  privBits.in <== private_key;
+
+  component mulFix = EscalarMulAny(253);
+  mulFix.p[0] <== public_key[0];
+  mulFix.p[1] <== public_key[1];
+
+  for (var i = 0; i < 253; i++) {
+    mulFix.e[i] <== privBits.out[i];
+  }
+
+  shared_key <== mulFix.out[0];
+}
\ No newline at end of file
diff --git a/circuits/crypto/encrypt.circom b/circuits/crypto/encrypt.circom
new file mode 100644
index 0000000..382325e
--- /dev/null
+++ b/circuits/crypto/encrypt.circom
@@ -0,0 +1,74 @@
+//from zk-ml/linear-regression-demo
+
+pragma circom 2.0.0;
+
+include "../circomlib/mimc.circom";
+
+template EncryptBits(N) {
+  signal input plaintext[N];
+  signal input shared_key;
+  signal output out[N+1];
+
+  component mimc = MultiMiMC7(N, 91);
+  for (var i=0; i<N; i++) {
+    mimc.in[i] <== plaintext[i];
+  }
+  mimc.k <== 0;
+  out[0] <== mimc.out;
+
+  component hasher[N];
+  for(var i=0; i<N; i++) {
+    hasher[i] = MiMC7(91);
+    hasher[i].x_in <== shared_key;
+    hasher[i].k <== out[0] + i;
+    out[i+1] <== plaintext[i] + hasher[i].out;
+  }
+}
+
+template Encrypt() {
+  signal input plaintext;
+  signal input shared_key;
+  signal output out[2];
+
+  component mimc = MultiMiMC7(1, 91);
+  mimc.in[0] <== plaintext;
+  mimc.k <== 0;
+  out[0] <== mimc.out;
+
+  component hasher;
+  hasher = MiMC7(91);
+  hasher.x_in <== shared_key;
+  hasher.k <== out[0];
+  out[1] <== plaintext + hasher.out;
+}
+
+
+template DecryptBits(N) {
+  signal input message[N+1];
+  signal input shared_key;
+  signal output out[N];
+
+  component hasher[N];
+
+  // iv is message[0]
+  for(var i=0; i<N; i++) {
+    hasher[i] = MiMC7(91);
+    hasher[i].x_in <== shared_key;
+    hasher[i].k <== message[0] + i;
+    out[i] <== message[i+1] - hasher[i].out;
+  }
+}
+
+template Decrypt() {
+  signal input message[2];
+  signal input shared_key;
+  signal output out;
+
+  component hasher;
+
+  // iv is message[0]
+  hasher = MiMC7(91);
+  hasher.x_in <== shared_key;
+  hasher.k <== message[0];
+  out <== message[1] - hasher.out;
+}
\ No newline at end of file
diff --git a/circuits/crypto/publickey_derivation.circom b/circuits/crypto/publickey_derivation.circom
new file mode 100644
index 0000000..7856a5c
--- /dev/null
+++ b/circuits/crypto/publickey_derivation.circom
@@ -0,0 +1,30 @@
+// from privacy-scaling-explorations/maci
+
+pragma circom 2.0.0;
+
+include "../circomlib/bitify.circom";
+include "../circomlib/escalarmulfix.circom";
+
+template PublicKey() {
+  // Note: private key
+  // Needs to be hashed, and then pruned before
+  // supplying it to the circuit
+  signal input private_key;
+  signal output public_key[2];
+
+  component privBits = Num2Bits(253);
+  privBits.in <== private_key;
+
+  var BASE8[2] = [
+    5299619240641551281634865583518297030282874472190772894086521144482721001553,
+    16950150798460657717958625567821834550301663161624707787222815936182638968203
+  ];
+
+  component mulFix = EscalarMulFix(253, BASE8);
+  for (var i = 0; i < 253; i++) {
+    mulFix.e[i] <== privBits.out[i];
+  }
+
+  public_key[0] <== mulFix.out[0];
+  public_key[1] <== mulFix.out[1];
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index dc64ca3..e53c695 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,19 +9,22 @@
       "version": "1.3.0",
       "license": "GPL-3.0",
       "devDependencies": {
+        "@types/node": "^18.11.9",
         "blake-hash": "^2.0.0",
         "chai": "^4.3.4",
         "circom_tester": "0.0.5",
         "circomlib": "^2.0.3",
         "circomlib-matrix": "^1.0.1",
         "circomlibjs": "^0.1.0",
-        "mocha": "^9.1.3"
+        "ethers": "^4.0.45",
+        "mocha": "^9.1.3",
+        "web3-utils": "^1.8.1"
       }
     },
     "node_modules/@ethersproject/abi": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.6.0.tgz",
-      "integrity": "sha512-AhVByTwdXCc2YQ20v300w6KVHle9g2OFc28ZAFCPnJyEpkv1xKXjZcSTgWOlv1i+0dqlgF8RCF2Rn2KC1t+1Vg==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.7.0.tgz",
+      "integrity": "sha512-351ktp42TiRcYB3H1OP8yajPeAQstMW/yCFokj/AthP9bLHzQFPlOrxOcwYEDkUAICmOHljvN4K39OMTMUa9RA==",
       "dev": true,
       "funding": [
         {
@@ -34,21 +37,21 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/address": "^5.6.0",
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/constants": "^5.6.0",
-        "@ethersproject/hash": "^5.6.0",
-        "@ethersproject/keccak256": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/strings": "^5.6.0"
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/constants": "^5.7.0",
+        "@ethersproject/hash": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/strings": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/abstract-provider": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-provider/-/abstract-provider-5.6.0.tgz",
-      "integrity": "sha512-oPMFlKLN+g+y7a79cLK3WiLcjWFnZQtXWgnLAbHZcN3s7L4v90UHpTOrLk+m3yr0gt+/h9STTM6zrr7PM8uoRw==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-provider/-/abstract-provider-5.7.0.tgz",
+      "integrity": "sha512-R41c9UkchKCpAqStMYUpdunjo3pkEvZC3FAwZn5S5MGbXoMQOHIdHItezTETxAO5bevtMApSyEhn9+CHcDsWBw==",
       "dev": true,
       "funding": [
         {
@@ -61,19 +64,19 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/networks": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/transactions": "^5.6.0",
-        "@ethersproject/web": "^5.6.0"
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/networks": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/transactions": "^5.7.0",
+        "@ethersproject/web": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/abstract-signer": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-signer/-/abstract-signer-5.6.0.tgz",
-      "integrity": "sha512-WOqnG0NJKtI8n0wWZPReHtaLkDByPL67tn4nBaDAhmVq8sjHTPbCdz4DRhVu/cfTOvfy9w3iq5QZ7BX7zw56BQ==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-signer/-/abstract-signer-5.7.0.tgz",
+      "integrity": "sha512-a16V8bq1/Cz+TGCkE2OPMTOUDLS3grCpdjoJCYNnVBbdYEMSgKrU0+B90s8b6H+ByYTBZN7a3g76jdIJi7UfKQ==",
       "dev": true,
       "funding": [
         {
@@ -86,17 +89,17 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/abstract-provider": "^5.6.0",
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0"
+        "@ethersproject/abstract-provider": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/address": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/address/-/address-5.6.0.tgz",
-      "integrity": "sha512-6nvhYXjbXsHPS+30sHZ+U4VMagFC/9zAk6Gd/h3S21YW4+yfb0WfRtaAIZ4kfM4rrVwqiy284LP0GtL5HXGLxQ==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/address/-/address-5.7.0.tgz",
+      "integrity": "sha512-9wYhYt7aghVGo758POM5nqcOMaE168Q6aRLJZwUmiqSrAungkG74gSSeKEIR7ukixesdRZGPgVqme6vmxs1fkA==",
       "dev": true,
       "funding": [
         {
@@ -109,17 +112,17 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/keccak256": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/rlp": "^5.6.0"
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/rlp": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/base64": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/base64/-/base64-5.6.0.tgz",
-      "integrity": "sha512-2Neq8wxJ9xHxCF9TUgmKeSh9BXJ6OAxWfeGWvbauPh8FuHEjamgHilllx8KkSd5ErxyHIX7Xv3Fkcud2kY9ezw==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/base64/-/base64-5.7.0.tgz",
+      "integrity": "sha512-Dr8tcHt2mEbsZr/mwTPIQAf3Ai0Bks/7gTw9dSqk1mQvhW3XvRlmDJr/4n+wg1JmCl16NZue17CDh8xb/vZ0sQ==",
       "dev": true,
       "funding": [
         {
@@ -132,13 +135,13 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bytes": "^5.6.0"
+        "@ethersproject/bytes": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/basex": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/basex/-/basex-5.6.0.tgz",
-      "integrity": "sha512-qN4T+hQd/Md32MoJpc69rOwLYRUXwjTlhHDIeUkUmiN/JyWkkLLMoG0TqvSQKNqZOMgN5stbUYN6ILC+eD7MEQ==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/basex/-/basex-5.7.0.tgz",
+      "integrity": "sha512-ywlh43GwZLv2Voc2gQVTKBoVQ1mti3d8HK5aMxsfu/nRDnMmNqaSJ3r3n85HBByT8OpoY96SXM1FogC533T4zw==",
       "dev": true,
       "funding": [
         {
@@ -151,14 +154,14 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0"
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/bignumber": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/bignumber/-/bignumber-5.6.0.tgz",
-      "integrity": "sha512-VziMaXIUHQlHJmkv1dlcd6GY2PmT0khtAqaMctCIDogxkrarMzA9L94KN1NeXqqOfFD6r0sJT3vCTOFSmZ07DA==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/bignumber/-/bignumber-5.7.0.tgz",
+      "integrity": "sha512-n1CAdIHRWjSucQO3MC1zPSVgV/6dy/fjL9pMrPP9peL+QxEg9wOsVqwD4+818B6LUEtaXzVHQiuivzRoxPxUGw==",
       "dev": true,
       "funding": [
         {
@@ -171,15 +174,21 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "bn.js": "^4.11.9"
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "bn.js": "^5.2.1"
       }
     },
+    "node_modules/@ethersproject/bignumber/node_modules/bn.js": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
+      "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
+      "dev": true
+    },
     "node_modules/@ethersproject/bytes": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.6.0.tgz",
-      "integrity": "sha512-3hJPlYemb9V4VLfJF5BfN0+55vltPZSHU3QKUyP9M3Y2TcajbiRrz65UG+xVHOzBereB1b9mn7r12o177xgN7w==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.7.0.tgz",
+      "integrity": "sha512-nsbxwgFXWh9NyYWo+U8atvmMsSdKJprTcICAkvbBffT75qDocbuggBU0SJiVK2MuTrp0q+xvLkTnGMPK1+uA9A==",
       "dev": true,
       "funding": [
         {
@@ -192,13 +201,13 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/logger": "^5.6.0"
+        "@ethersproject/logger": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/constants": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/constants/-/constants-5.6.0.tgz",
-      "integrity": "sha512-SrdaJx2bK0WQl23nSpV/b1aq293Lh0sUaZT/yYKPDKn4tlAbkH96SPJwIhwSwTsoQQZxuh1jnqsKwyymoiBdWA==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/constants/-/constants-5.7.0.tgz",
+      "integrity": "sha512-DHI+y5dBNvkpYUMiRQyxRBYBefZkJfo70VUkUAsRjcPs47muV9evftfZ0PJVCXYbAiCgght0DtcF9srFQmIgWA==",
       "dev": true,
       "funding": [
         {
@@ -211,13 +220,13 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/bignumber": "^5.6.0"
+        "@ethersproject/bignumber": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/contracts": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/contracts/-/contracts-5.6.0.tgz",
-      "integrity": "sha512-74Ge7iqTDom0NX+mux8KbRUeJgu1eHZ3iv6utv++sLJG80FVuU9HnHeKVPfjd9s3woFhaFoQGf3B3iH/FrQmgw==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/contracts/-/contracts-5.7.0.tgz",
+      "integrity": "sha512-5GJbzEU3X+d33CdfPhcyS+z8MzsTrBGk/sc+G+59+tPa9yFkl6HQ9D6L0QMgNTA9q8dT0XKxxkyp883XsQvbbg==",
       "dev": true,
       "funding": [
         {
@@ -230,22 +239,22 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/abi": "^5.6.0",
-        "@ethersproject/abstract-provider": "^5.6.0",
-        "@ethersproject/abstract-signer": "^5.6.0",
-        "@ethersproject/address": "^5.6.0",
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/constants": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/transactions": "^5.6.0"
+        "@ethersproject/abi": "^5.7.0",
+        "@ethersproject/abstract-provider": "^5.7.0",
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/constants": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/transactions": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/hash": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/hash/-/hash-5.6.0.tgz",
-      "integrity": "sha512-fFd+k9gtczqlr0/BruWLAu7UAOas1uRRJvOR84uDf4lNZ+bTkGl366qvniUZHKtlqxBRU65MkOobkmvmpHU+jA==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/hash/-/hash-5.7.0.tgz",
+      "integrity": "sha512-qX5WrQfnah1EFnO5zJv1v46a8HW0+E5xuBBDTwMFZLuVTx0tbU2kkx15NqdjxecrLGatQN9FGQKpb1FKdHCt+g==",
       "dev": true,
       "funding": [
         {
@@ -258,20 +267,21 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/abstract-signer": "^5.6.0",
-        "@ethersproject/address": "^5.6.0",
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/keccak256": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/strings": "^5.6.0"
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/base64": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/strings": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/hdnode": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/hdnode/-/hdnode-5.6.0.tgz",
-      "integrity": "sha512-61g3Jp3nwDqJcL/p4nugSyLrpl/+ChXIOtCEM8UDmWeB3JCAt5FoLdOMXQc3WWkc0oM2C0aAn6GFqqMcS/mHTw==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/hdnode/-/hdnode-5.7.0.tgz",
+      "integrity": "sha512-OmyYo9EENBPPf4ERhR7oj6uAtUAhYGqOnIS+jE5pTXvdKBS99ikzq1E7Iv0ZQZ5V36Lqx1qZLeak0Ra16qpeOg==",
       "dev": true,
       "funding": [
         {
@@ -284,24 +294,24 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/abstract-signer": "^5.6.0",
-        "@ethersproject/basex": "^5.6.0",
-        "@ethersproject/bignumber": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/pbkdf2": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/sha2": "^5.6.0",
-        "@ethersproject/signing-key": "^5.6.0",
-        "@ethersproject/strings": "^5.6.0",
-        "@ethersproject/transactions": "^5.6.0",
-        "@ethersproject/wordlists": "^5.6.0"
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/basex": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/pbkdf2": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/sha2": "^5.7.0",
+        "@ethersproject/signing-key": "^5.7.0",
+        "@ethersproject/strings": "^5.7.0",
+        "@ethersproject/transactions": "^5.7.0",
+        "@ethersproject/wordlists": "^5.7.0"
       }
     },
     "node_modules/@ethersproject/json-wallets": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/json-wallets/-/json-wallets-5.6.0.tgz",
-      "integrity": "sha512-fmh86jViB9r0ibWXTQipxpAGMiuxoqUf78oqJDlCAJXgnJF024hOOX7qVgqsjtbeoxmcLwpPsXNU0WEe/16qPQ==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/json-wallets/-/json-wallets-5.7.0.tgz",
+      "integrity": "sha512-8oee5Xgu6+RKgJTkvEMl2wDgSPSAQ9MB/3JYjFV9jlKvcYHUXZC+cQp0njgmxdHkYWn8s6/IqIZYm0YWCjO/0g==",
       "dev": true,
       "funding": [
         {
@@ -314,25 +324,25 @@
         }
       ],
       "dependencies": {
-        "@ethersproject/abstract-signer": "^5.6.0",
-        "@ethersproject/address": "^5.6.0",
-        "@ethersproject/bytes": "^5.6.0",
-        "@ethersproject/hdnode": "^5.6.0",
-        "@ethersproject/keccak256": "^5.6.0",
-        "@ethersproject/logger": "^5.6.0",
-        "@ethersproject/pbkdf2": "^5.6.0",
-        "@ethersproject/properties": "^5.6.0",
-        "@ethersproject/random": "^5.6.0",
-        "@ethersproject/strings": "^5.6.0",
-        "@ethersproject/transactions": "^5.6.0",
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/hdnode": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/pbkdf2": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
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+      }
+    },
     "safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -4290,6 +5176,25 @@
       "integrity": "sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA==",
       "dev": true
     },
+    "secp256k1": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-4.0.3.tgz",
+      "integrity": "sha512-NLZVf+ROMxwtEj3Xa562qgv2BK5e2WNmXPiOdVIPLgs6lyTzMvBq0aWTYMI5XCP9jZMVKOcqZLw/Wc4vDkuxhA==",
+      "dev": true,
+      "requires": {
+        "elliptic": "^6.5.4",
+        "node-addon-api": "^2.0.0",
+        "node-gyp-build": "^4.2.0"
+      },
+      "dependencies": {
+        "node-addon-api": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-2.0.2.tgz",
+          "integrity": "sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA==",
+          "dev": true
+        }
+      }
+    },
     "serialize-javascript": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-6.0.0.tgz",
@@ -4299,6 +5204,22 @@
         "randombytes": "^2.1.0"
       }
     },
+    "setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha512-MATJdZp8sLqDl/68LfQmbP8zKPLQNV6BIZoIgrscFDQ+RsvK/BxeDQOgyxKKoh0y/8h3BqVFnCqQ/gd+reiIXA==",
+      "dev": true
+    },
+    "sha.js": {
+      "version": "2.4.11",
+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+      "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
+      "dev": true,
+      "requires": {
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.0.1"
+      }
+    },
     "side-channel": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
@@ -4359,6 +5280,15 @@
         "ansi-regex": "^5.0.1"
       }
     },
+    "strip-hex-prefix": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/strip-hex-prefix/-/strip-hex-prefix-1.0.0.tgz",
+      "integrity": "sha512-q8d4ue7JGEiVcypji1bALTos+0pWtyGlivAWyPuTkHzuTCJqrK9sWxYQZUq6Nq3cuyv3bm734IhHvHtGGURU6A==",
+      "dev": true,
+      "requires": {
+        "is-hex-prefixed": "1.0.0"
+      }
+    },
     "strip-json-comments": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
@@ -4419,6 +5349,12 @@
         "which-boxed-primitive": "^1.0.2"
       }
     },
+    "utf8": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/utf8/-/utf8-3.0.0.tgz",
+      "integrity": "sha512-E8VjFIQ/TyQgp+TZfS6l8yp/xWppSAHzidGiRrqe4bK4XP9pTRyKFgGJpO3SN7zdX4DeomTrwaseCHovfpFcqQ==",
+      "dev": true
+    },
     "util": {
       "version": "0.12.4",
       "resolved": "https://registry.npmjs.org/util/-/util-0.12.4.tgz",
@@ -4439,6 +5375,12 @@
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
+    "uuid": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-2.0.1.tgz",
+      "integrity": "sha512-nWg9+Oa3qD2CQzHIP4qKUqwNfzKn8P0LtFhotaCTFchsV7ZfDhAybeip/HZVeMIpZi9JgY1E3nUlwaCmZT1sEg==",
+      "dev": true
+    },
     "wasmbuilder": {
       "version": "0.0.12",
       "resolved": "https://registry.npmjs.org/wasmbuilder/-/wasmbuilder-0.0.12.tgz",
@@ -4464,6 +5406,29 @@
       "integrity": "sha512-PgF341avzqyx60neE9DD+XS26MMNMoUQRz9NOZwW32nPQrF6p77f1htcnjBSEV8BGMKZ16choqUG4hyI0Hx7mA==",
       "dev": true
     },
+    "web3-utils": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.8.1.tgz",
+      "integrity": "sha512-LgnM9p6V7rHHUGfpMZod+NST8cRfGzJ1BTXAyNo7A9cJX9LczBfSRxJp+U/GInYe9mby40t3v22AJdlELibnsQ==",
+      "dev": true,
+      "requires": {
+        "bn.js": "^5.2.1",
+        "ethereum-bloom-filters": "^1.0.6",
+        "ethereumjs-util": "^7.1.0",
+        "ethjs-unit": "0.1.6",
+        "number-to-bn": "1.7.0",
+        "randombytes": "^2.1.0",
+        "utf8": "3.0.0"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
+          "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
+          "dev": true
+        }
+      }
+    },
     "which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -4536,6 +5501,12 @@
       "dev": true,
       "requires": {}
     },
+    "xmlhttprequest": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
+      "integrity": "sha512-58Im/U0mlVBLM38NdZjHyhuMtCqa61469k2YP/AaPbvCoV9aQGUpbJBj1QRm2ytRiVQBD/fsw7L2bJGDVQswBA==",
+      "dev": true
+    },
     "y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
diff --git a/package.json b/package.json
index 2b3f33b..ed3cae6 100644
--- a/package.json
+++ b/package.json
@@ -23,12 +23,15 @@
   "author": "Cathie So, PhD",
   "license": "GPL-3.0",
   "devDependencies": {
+    "@types/node": "^18.11.9",
     "blake-hash": "^2.0.0",
     "chai": "^4.3.4",
     "circom_tester": "0.0.5",
     "circomlib": "^2.0.3",
     "circomlib-matrix": "^1.0.1",
     "circomlibjs": "^0.1.0",
-    "mocha": "^9.1.3"
+    "ethers": "^4.0.45",
+    "mocha": "^9.1.3",
+    "web3-utils": "^1.8.1"
   }
 }
diff --git a/test/circuits/ecdh_test.circom b/test/circuits/ecdh_test.circom
new file mode 100644
index 0000000..d6b1301
--- /dev/null
+++ b/test/circuits/ecdh_test.circom
@@ -0,0 +1,5 @@
+pragma circom 2.0.3;
+
+include "../../circuits/crypto/ecdh.circom";
+
+component main = Ecdh();
\ No newline at end of file
diff --git a/test/circuits/publicKey_test.circom b/test/circuits/publicKey_test.circom
new file mode 100644
index 0000000..00d7acb
--- /dev/null
+++ b/test/circuits/publicKey_test.circom
@@ -0,0 +1,5 @@
+pragma circom 2.0.3;
+
+include "../../circuits/crypto/publickey_derivation.circom";
+
+component main = PublicKey();
\ No newline at end of file
diff --git a/test/encryption.js b/test/encryption.js
new file mode 100644
index 0000000..6cf926e
--- /dev/null
+++ b/test/encryption.js
@@ -0,0 +1,34 @@
+const chai = require("chai");
+const path = require("path");
+
+const wasm_tester = require("circom_tester").wasm;
+
+const F1Field = require("ffjavascript").F1Field;
+const Scalar = require("ffjavascript").Scalar;
+exports.p = Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617");
+const Fr = new F1Field(exports.p);
+
+const assert = chai.assert;
+const { Keypair } = require("./modules/maci-domainobjs");
+
+describe("crypto circuits test", function () {
+    this.timeout(100000000);
+
+    it("public key test", async () => {
+        const circuit = await wasm_tester(path.join(__dirname, "circuits", "publicKey_test.circom"));
+
+        const keypair = new Keypair();
+
+        const INPUT = {
+            'private_key': keypair.privKey.asCircuitInputs(),
+        }
+
+        const witness = await circuit.calculateWitness(INPUT, true);
+
+        //console.log(witness);
+
+        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
+        assert(Fr.eq(Fr.e(witness[1]), Fr.e(keypair.pubKey.rawPubKey[0])));
+        assert(Fr.eq(Fr.e(witness[2]), Fr.e(keypair.pubKey.rawPubKey[1])));
+    });
+});
\ No newline at end of file
diff --git a/test/modules/circomlib-0.5.1.js b/test/modules/circomlib-0.5.1.js
new file mode 100644
index 0000000..a0293a9
--- /dev/null
+++ b/test/modules/circomlib-0.5.1.js
@@ -0,0 +1,12 @@
+exports.smt = require("./src/smt");
+exports.eddsa = require("./src/eddsa");
+exports.mimc7 = require("./src/mimc7");
+exports.mimcsponge = require("./src/mimcsponge");
+exports.babyJub = require("./src/babyjub");
+exports.pedersenHash = require("./src/pedersenHash");
+exports.SMT = require("./src/smt").SMT;
+exports.SMTMemDB = require("./src/smt_memdb");
+exports.poseidon = require("./src/poseidon");
+
+
+
diff --git a/test/modules/maci-crypto.js b/test/modules/maci-crypto.js
new file mode 100644
index 0000000..6b93fd1
--- /dev/null
+++ b/test/modules/maci-crypto.js
@@ -0,0 +1,238 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.unpackPubKey = exports.packPubKey = exports.bigInt2Buffer = exports.SNARK_FIELD_SIZE = exports.NOTHING_UP_MY_SLEEVE_PUBKEY = exports.NOTHING_UP_MY_SLEEVE = exports.formatPrivKeyForBabyJub = exports.unstringifyBigInts = exports.stringifyBigInts = exports.verifySignature = exports.hashLeftRight = exports.hash11 = exports.hash5 = exports.hashOne = exports.sign = exports.decrypt = exports.encrypt = exports.genEcdhSharedKey = exports.genKeypair = exports.genPubKey = exports.genPrivKey = exports.genRandomSalt = void 0;
+const assert = require('assert');
+const crypto = require("crypto");
+const ethers = require("ethers");
+const ff = require('ffjavascript');
+const createBlakeHash = require('blake-hash');
+const circomlib_0_5_1_1 = require("./circomlib-0.5.1");
+const stringifyBigInts = ff.utils.stringifyBigInts;
+exports.stringifyBigInts = stringifyBigInts;
+const unstringifyBigInts = ff.utils.unstringifyBigInts;
+exports.unstringifyBigInts = unstringifyBigInts;
+const SNARK_FIELD_SIZE = BigInt('21888242871839275222246405745257275088548364400416034343698204186575808495617');
+exports.SNARK_FIELD_SIZE = SNARK_FIELD_SIZE;
+// A nothing-up-my-sleeve zero value
+// Should be equal to 8370432830353022751713833565135785980866757267633941821328460903436894336785
+const NOTHING_UP_MY_SLEEVE = BigInt(ethers.utils.solidityKeccak256(['bytes'], [ethers.utils.toUtf8Bytes('Maci')])) % SNARK_FIELD_SIZE;
+exports.NOTHING_UP_MY_SLEEVE = NOTHING_UP_MY_SLEEVE;
+// The pubkey is the first Pedersen base point from iden3's circomlib
+// See https://github.com/iden3/circomlib/blob/d5ed1c3ce4ca137a6b3ca48bec4ac12c1b38957a/src/pedersen_printbases.js
+const NOTHING_UP_MY_SLEEVE_PUBKEY = [
+    BigInt('10457101036533406547632367118273992217979173478358440826365724437999023779287'),
+    BigInt('19824078218392094440610104313265183977899662750282163392862422243483260492317')
+];
+exports.NOTHING_UP_MY_SLEEVE_PUBKEY = NOTHING_UP_MY_SLEEVE_PUBKEY;
+/*
+ * Convert a BigInt to a Buffer
+ */
+const bigInt2Buffer = (i) => {
+    let hexStr = i.toString(16);
+    while (hexStr.length < 64) {
+        hexStr = '0' + hexStr;
+    }
+    return Buffer.from(hexStr, 'hex');
+};
+exports.bigInt2Buffer = bigInt2Buffer;
+// Hash up to 2 elements
+const poseidonT3 = (inputs) => {
+    assert(inputs.length === 2);
+    return (0, circomlib_0_5_1_1.poseidon)(inputs);
+};
+// Hash up to 5 elements
+const poseidonT6 = (inputs) => {
+    assert(inputs.length === 5);
+    return (0, circomlib_0_5_1_1.poseidon)(inputs);
+};
+const hash5 = (elements) => {
+    const elementLength = elements.length;
+    if (elements.length > 5) {
+        throw new Error(`elements length should not greater than 5, got ${elements.length}`);
+    }
+    const elementsPadded = elements.slice();
+    if (elementLength < 5) {
+        for (let i = elementLength; i < 5; i++) {
+            elementsPadded.push(BigInt(0));
+        }
+    }
+    return poseidonT6(elementsPadded);
+};
+exports.hash5 = hash5;
+/*
+ * A convenience function for to use Poseidon to hash a Plaintext with
+ * no more than 11 elements
+ */
+const hash11 = (elements) => {
+    const elementLength = elements.length;
+    if (elementLength > 11) {
+        throw new TypeError(`elements length should not greater than 11, got ${elementLength}`);
+    }
+    const elementsPadded = elements.slice();
+    if (elementLength < 11) {
+        for (let i = elementLength; i < 11; i++) {
+            elementsPadded.push(BigInt(0));
+        }
+    }
+    return poseidonT3([
+        poseidonT3([
+            poseidonT6(elementsPadded.slice(0, 5)),
+            poseidonT6(elementsPadded.slice(5, 10))
+        ]),
+        elementsPadded[10]
+    ]);
+};
+exports.hash11 = hash11;
+/*
+ * Hash a single BigInt with the Poseidon hash function
+ */
+const hashOne = (preImage) => {
+    return poseidonT3([preImage, BigInt(0)]);
+};
+exports.hashOne = hashOne;
+/*
+ * Hash two BigInts with the Poseidon hash function
+ */
+const hashLeftRight = (left, right) => {
+    return poseidonT3([left, right]);
+};
+exports.hashLeftRight = hashLeftRight;
+/*
+ * Returns a BabyJub-compatible random value. We create it by first generating
+ * a random value (initially 256 bits large) modulo the snark field size as
+ * described in EIP197. This results in a key size of roughly 253 bits and no
+ * more than 254 bits. To prevent modulo bias, we then use this efficient
+ * algorithm:
+ * http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/lib/libc/crypt/arc4random_uniform.c
+ * @return A BabyJub-compatible random value.
+ */
+const genRandomBabyJubValue = () => {
+    // Prevent modulo bias
+    //const lim = BigInt('0x10000000000000000000000000000000000000000000000000000000000000000')
+    //const min = (lim - SNARK_FIELD_SIZE) % SNARK_FIELD_SIZE
+    const min = BigInt('6350874878119819312338956282401532410528162663560392320966563075034087161851');
+    let rand;
+    while (true) {
+        rand = BigInt('0x' + crypto.randomBytes(32).toString('hex'));
+        if (rand >= min) {
+            break;
+        }
+    }
+    const privKey = rand % SNARK_FIELD_SIZE;
+    assert(privKey < SNARK_FIELD_SIZE);
+    return privKey;
+};
+/*
+ * @return A BabyJub-compatible private key.
+ */
+const genPrivKey = () => {
+    return genRandomBabyJubValue();
+};
+exports.genPrivKey = genPrivKey;
+/*
+ * @return A BabyJub-compatible salt.
+ */
+const genRandomSalt = () => {
+    return genRandomBabyJubValue();
+};
+exports.genRandomSalt = genRandomSalt;
+/*
+ * An internal function which formats a random private key to be compatible
+ * with the BabyJub curve. This is the format which should be passed into the
+ * PublicKey and other circuits.
+ */
+const formatPrivKeyForBabyJub = (privKey) => {
+    const sBuff = circomlib_0_5_1_1.eddsa.pruneBuffer(createBlakeHash("blake512").update(bigInt2Buffer(privKey)).digest().slice(0, 32));
+    const s = ff.utils.leBuff2int(sBuff);
+    return ff.Scalar.shr(s, 3);
+};
+exports.formatPrivKeyForBabyJub = formatPrivKeyForBabyJub;
+/*
+ * Losslessly reduces the size of the representation of a public key
+ * @param pubKey The public key to pack
+ * @return A packed public key
+ */
+const packPubKey = (pubKey) => {
+    return circomlib_0_5_1_1.babyJub.packPoint(pubKey);
+};
+exports.packPubKey = packPubKey;
+/*
+ * Restores the original PubKey from its packed representation
+ * @param packed The value to unpack
+ * @return The unpacked public key
+ */
+const unpackPubKey = (packed) => {
+    return circomlib_0_5_1_1.babyJub.unpackPoint(packed);
+};
+exports.unpackPubKey = unpackPubKey;
+/*
+ * @param privKey A private key generated using genPrivKey()
+ * @return A public key associated with the private key
+ */
+const genPubKey = (privKey) => {
+    privKey = BigInt(privKey.toString());
+    assert(privKey < SNARK_FIELD_SIZE);
+    return circomlib_0_5_1_1.eddsa.prv2pub(bigInt2Buffer(privKey));
+};
+exports.genPubKey = genPubKey;
+const genKeypair = () => {
+    const privKey = genPrivKey();
+    const pubKey = genPubKey(privKey);
+    const Keypair = { privKey, pubKey };
+    return Keypair;
+};
+exports.genKeypair = genKeypair;
+/*
+ * Generates an Elliptic-curve Diffie–Hellman shared key given a private key
+ * and a public key.
+ * @return The ECDH shared key.
+ */
+const genEcdhSharedKey = (privKey, pubKey) => {
+    return circomlib_0_5_1_1.babyJub.mulPointEscalar(pubKey, formatPrivKeyForBabyJub(privKey))[0];
+};
+exports.genEcdhSharedKey = genEcdhSharedKey;
+/*
+ * Encrypts a plaintext using a given key.
+ * @return The ciphertext.
+ */
+const encrypt = (plaintext, sharedKey) => {
+    // Generate the IV
+    const iv = circomlib_0_5_1_1.mimc7.multiHash(plaintext, BigInt(0));
+    const ciphertext = {
+        iv,
+        data: plaintext.map((e, i) => {
+            return e + circomlib_0_5_1_1.mimc7.hash(sharedKey, iv + BigInt(i));
+        }),
+    };
+    // TODO: add asserts here
+    return ciphertext;
+};
+exports.encrypt = encrypt;
+/*
+ * Decrypts a ciphertext using a given key.
+ * @return The plaintext.
+ */
+const decrypt = (ciphertext, sharedKey) => {
+    const plaintext = ciphertext.data.map((e, i) => {
+        return BigInt(e) - BigInt(circomlib_0_5_1_1.mimc7.hash(sharedKey, BigInt(ciphertext.iv) + BigInt(i)));
+    });
+    return plaintext;
+};
+exports.decrypt = decrypt;
+/*
+ * Generates a signature given a private key and plaintext.
+ * @return The signature.
+ */
+const sign = (privKey, msg) => {
+    return circomlib_0_5_1_1.eddsa.signPoseidon(bigInt2Buffer(privKey), msg);
+};
+exports.sign = sign;
+/*
+ * Checks whether the signature of the given plaintext was created using the
+ * private key associated with the given public key.
+ * @return True if the signature is valid, and false otherwise.
+ */
+const verifySignature = (msg, signature, pubKey) => {
+    return circomlib_0_5_1_1.eddsa.verifyPoseidon(msg, signature, pubKey);
+};
+exports.verifySignature = verifySignature;
diff --git a/test/modules/maci-crypto.ts b/test/modules/maci-crypto.ts
new file mode 100644
index 0000000..df52116
--- /dev/null
+++ b/test/modules/maci-crypto.ts
@@ -0,0 +1,343 @@
+const assert = require('assert')
+const crypto = require("crypto")
+const ethers = require("ethers")
+const ff = require('ffjavascript')
+const createBlakeHash = require('blake-hash')
+import { babyJub, mimc7, poseidon, eddsa } from './circomlib-0.5.1'
+const stringifyBigInts: (obj: object) => any = ff.utils.stringifyBigInts
+const unstringifyBigInts: (obj: object) => any = ff.utils.unstringifyBigInts
+
+type SnarkBigInt = BigInt
+type PrivKey = BigInt
+type PubKey = BigInt[]
+type EcdhSharedKey = BigInt
+type Plaintext = BigInt[]
+
+interface Keypair {
+    privKey: PrivKey;
+    pubKey: PubKey;
+}
+
+interface Ciphertext {
+    // The initialisation vector
+    iv: BigInt;
+
+    // The encrypted data
+    data: BigInt[];
+}
+
+// An EdDSA signature.
+// TODO: document what R8 and S mean
+interface Signature {
+    R8: BigInt[];
+    S: BigInt;
+}
+
+const SNARK_FIELD_SIZE = BigInt(
+    '21888242871839275222246405745257275088548364400416034343698204186575808495617'
+)
+
+// A nothing-up-my-sleeve zero value
+// Should be equal to 8370432830353022751713833565135785980866757267633941821328460903436894336785
+const NOTHING_UP_MY_SLEEVE =
+    BigInt(ethers.utils.solidityKeccak256(['bytes'], [ethers.utils.toUtf8Bytes('Maci')])) % SNARK_FIELD_SIZE
+
+// The pubkey is the first Pedersen base point from iden3's circomlib
+// See https://github.com/iden3/circomlib/blob/d5ed1c3ce4ca137a6b3ca48bec4ac12c1b38957a/src/pedersen_printbases.js
+const NOTHING_UP_MY_SLEEVE_PUBKEY: PubKey = [
+    BigInt('10457101036533406547632367118273992217979173478358440826365724437999023779287'),
+    BigInt('19824078218392094440610104313265183977899662750282163392862422243483260492317')
+]
+
+/*
+ * Convert a BigInt to a Buffer
+ */
+const bigInt2Buffer = (i: BigInt): Buffer => {
+    let hexStr = i.toString(16)
+    while (hexStr.length < 64) {
+        hexStr = '0' + hexStr
+    }
+    return Buffer.from(hexStr, 'hex')
+}
+
+// Hash up to 2 elements
+const poseidonT3 = (inputs: BigInt[]) => {
+    assert(inputs.length === 2)
+    return poseidon(inputs)
+}
+
+// Hash up to 5 elements
+const poseidonT6 = (inputs: BigInt[]) => {
+    assert(inputs.length === 5)
+    return poseidon(inputs)
+}
+
+const hash5 = (elements: Plaintext): BigInt => {
+    const elementLength = elements.length
+    if (elements.length > 5) {
+        throw new Error(`elements length should not greater than 5, got ${elements.length}`)
+    }
+    const elementsPadded = elements.slice()
+    if (elementLength < 5) {
+        for (let i = elementLength; i < 5; i++) {
+            elementsPadded.push(BigInt(0))
+        }
+    }
+    return poseidonT6(elementsPadded)
+}
+
+/*
+ * A convenience function for to use Poseidon to hash a Plaintext with
+ * no more than 11 elements
+ */
+const hash11 = (elements: Plaintext): BigInt => {
+    const elementLength = elements.length
+    if (elementLength > 11) {
+        throw new TypeError(`elements length should not greater than 11, got ${elementLength}`)
+    }
+    const elementsPadded = elements.slice()
+    if (elementLength < 11) {
+        for (let i = elementLength; i < 11; i++) {
+            elementsPadded.push(BigInt(0))
+        }
+    }
+    return poseidonT3([
+        poseidonT3([
+            poseidonT6(elementsPadded.slice(0, 5)),
+            poseidonT6(elementsPadded.slice(5, 10))
+        ])
+        , elementsPadded[10]
+    ])
+}
+
+/*
+ * Hash a single BigInt with the Poseidon hash function
+ */
+const hashOne = (preImage: BigInt): BigInt => {
+
+    return poseidonT3([preImage, BigInt(0)])
+}
+
+/*
+ * Hash two BigInts with the Poseidon hash function
+ */
+const hashLeftRight = (left: BigInt, right: BigInt): BigInt => {
+    return poseidonT3([left, right])
+}
+
+/*
+ * Returns a BabyJub-compatible random value. We create it by first generating
+ * a random value (initially 256 bits large) modulo the snark field size as
+ * described in EIP197. This results in a key size of roughly 253 bits and no
+ * more than 254 bits. To prevent modulo bias, we then use this efficient
+ * algorithm:
+ * http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/lib/libc/crypt/arc4random_uniform.c
+ * @return A BabyJub-compatible random value.
+ */
+const genRandomBabyJubValue = (): BigInt => {
+
+    // Prevent modulo bias
+    //const lim = BigInt('0x10000000000000000000000000000000000000000000000000000000000000000')
+    //const min = (lim - SNARK_FIELD_SIZE) % SNARK_FIELD_SIZE
+    const min = BigInt('6350874878119819312338956282401532410528162663560392320966563075034087161851')
+
+    let rand
+    while (true) {
+        rand = BigInt('0x' + crypto.randomBytes(32).toString('hex'))
+
+        if (rand >= min) {
+            break
+        }
+    }
+
+    const privKey: PrivKey = rand % SNARK_FIELD_SIZE
+    assert(privKey < SNARK_FIELD_SIZE)
+
+    return privKey
+}
+
+/*
+ * @return A BabyJub-compatible private key.
+ */
+const genPrivKey = (): PrivKey => {
+
+    return genRandomBabyJubValue()
+}
+
+/*
+ * @return A BabyJub-compatible salt.
+ */
+const genRandomSalt = (): PrivKey=> {
+
+    return genRandomBabyJubValue()
+}
+
+/*
+ * An internal function which formats a random private key to be compatible
+ * with the BabyJub curve. This is the format which should be passed into the
+ * PublicKey and other circuits.
+ */
+const formatPrivKeyForBabyJub = (privKey: PrivKey) => {
+    const sBuff = eddsa.pruneBuffer(
+        createBlakeHash("blake512").update(
+            bigInt2Buffer(privKey),
+        ).digest().slice(0,32)
+    )
+    const s = ff.utils.leBuff2int(sBuff)
+    return ff.Scalar.shr(s, 3)
+}
+
+/*
+ * Losslessly reduces the size of the representation of a public key
+ * @param pubKey The public key to pack
+ * @return A packed public key
+ */
+const packPubKey = (pubKey: PubKey): Buffer => {
+    return babyJub.packPoint(pubKey)
+}
+
+/*
+ * Restores the original PubKey from its packed representation
+ * @param packed The value to unpack
+ * @return The unpacked public key
+ */
+const unpackPubKey = (packed: Buffer): PubKey => {
+    return babyJub.unpackPoint(packed)
+}
+
+/*
+ * @param privKey A private key generated using genPrivKey()
+ * @return A public key associated with the private key
+ */
+const genPubKey = (privKey: PrivKey): PubKey => {
+    privKey = BigInt(privKey.toString())
+    assert(privKey < SNARK_FIELD_SIZE)
+    return eddsa.prv2pub(bigInt2Buffer(privKey))
+}
+
+const genKeypair = (): Keypair => {
+    const privKey = genPrivKey()
+    const pubKey = genPubKey(privKey)
+
+    const Keypair: Keypair = { privKey, pubKey }
+
+    return Keypair
+}
+
+/*
+ * Generates an Elliptic-curve Diffie–Hellman shared key given a private key
+ * and a public key.
+ * @return The ECDH shared key.
+ */
+const genEcdhSharedKey = (
+    privKey: PrivKey,
+    pubKey: PubKey,
+): EcdhSharedKey => {
+
+    return babyJub.mulPointEscalar(pubKey, formatPrivKeyForBabyJub(privKey))[0]
+}
+
+/*
+ * Encrypts a plaintext using a given key.
+ * @return The ciphertext.
+ */
+const encrypt = (
+    plaintext: Plaintext,
+    sharedKey: EcdhSharedKey,
+): Ciphertext => {
+
+    // Generate the IV
+    const iv = mimc7.multiHash(plaintext, BigInt(0))
+
+    const ciphertext: Ciphertext = {
+        iv,
+        data: plaintext.map((e: BigInt, i: number): BigInt => {
+            return e + mimc7.hash(
+                sharedKey,
+                iv + BigInt(i),
+            )
+        }),
+    }
+
+    // TODO: add asserts here
+    return ciphertext
+}
+
+/*
+ * Decrypts a ciphertext using a given key.
+ * @return The plaintext.
+ */
+const decrypt = (
+    ciphertext: Ciphertext,
+    sharedKey: EcdhSharedKey,
+): Plaintext => {
+
+    const plaintext: Plaintext = ciphertext.data.map(
+        (e: BigInt, i: number): BigInt => {
+            return BigInt(e) - BigInt(mimc7.hash(sharedKey, BigInt(ciphertext.iv) + BigInt(i)))
+        }
+    )
+
+    return plaintext
+}
+
+/*
+ * Generates a signature given a private key and plaintext.
+ * @return The signature.
+ */
+const sign = (
+    privKey: PrivKey,
+    msg: BigInt,
+): Signature => {
+    return eddsa.signPoseidon(
+        bigInt2Buffer(privKey),
+        msg,
+    )
+}
+
+/*
+ * Checks whether the signature of the given plaintext was created using the
+ * private key associated with the given public key.
+ * @return True if the signature is valid, and false otherwise.
+ */
+const verifySignature = (
+    msg: BigInt,
+    signature: Signature,
+    pubKey: PubKey,
+): boolean => {
+
+    return eddsa.verifyPoseidon(msg, signature, pubKey)
+}
+
+export {
+    genRandomSalt,
+    genPrivKey,
+    genPubKey,
+    genKeypair,
+    genEcdhSharedKey,
+    encrypt,
+    decrypt,
+    sign,
+    hashOne,
+    hash5,
+    hash11,
+    hashLeftRight,
+    verifySignature,
+    Signature,
+    PrivKey,
+    PubKey,
+    Keypair,
+    EcdhSharedKey,
+    Ciphertext,
+    Plaintext,
+    SnarkBigInt,
+    stringifyBigInts,
+    unstringifyBigInts,
+    formatPrivKeyForBabyJub,
+    NOTHING_UP_MY_SLEEVE,
+    NOTHING_UP_MY_SLEEVE_PUBKEY,
+    SNARK_FIELD_SIZE,
+    bigInt2Buffer,
+    packPubKey,
+    unpackPubKey,
+}
\ No newline at end of file
diff --git a/test/modules/maci-domainobjs.js b/test/modules/maci-domainobjs.js
new file mode 100644
index 0000000..5b73697
--- /dev/null
+++ b/test/modules/maci-domainobjs.js
@@ -0,0 +1,296 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.PrivKey = exports.PubKey = exports.Keypair = exports.Message = exports.Command = exports.StateLeaf = void 0;
+const assert = require('assert');
+const maci_crypto_1 = require("./maci-crypto");
+const SERIALIZED_PRIV_KEY_PREFIX = 'macisk.';
+class PrivKey {
+    constructor(rawPrivKey) {
+        this.copy = () => {
+            return new PrivKey(BigInt(this.rawPrivKey.toString()));
+        };
+        this.asCircuitInputs = () => {
+            return (0, maci_crypto_1.formatPrivKeyForBabyJub)(this.rawPrivKey).toString();
+        };
+        this.serialize = () => {
+            return SERIALIZED_PRIV_KEY_PREFIX + this.rawPrivKey.toString(16);
+        };
+        this.rawPrivKey = rawPrivKey;
+    }
+}
+exports.PrivKey = PrivKey;
+PrivKey.unserialize = (s) => {
+    const x = s.slice(SERIALIZED_PRIV_KEY_PREFIX.length);
+    return new PrivKey(BigInt('0x' + x));
+};
+PrivKey.isValidSerializedPrivKey = (s) => {
+    const correctPrefix = s.startsWith(SERIALIZED_PRIV_KEY_PREFIX);
+    const x = s.slice(SERIALIZED_PRIV_KEY_PREFIX.length);
+    let validValue = false;
+    try {
+        const value = BigInt('0x' + x);
+        validValue = value < maci_crypto_1.SNARK_FIELD_SIZE;
+    }
+    catch {
+        // comment to make linter happy 
+    }
+    return correctPrefix && validValue;
+};
+const SERIALIZED_PUB_KEY_PREFIX = 'macipk.';
+class PubKey {
+    constructor(rawPubKey) {
+        this.copy = () => {
+            return new PubKey([
+                BigInt(this.rawPubKey[0].toString()),
+                BigInt(this.rawPubKey[1].toString()),
+            ]);
+        };
+        this.asContractParam = () => {
+            return {
+                x: this.rawPubKey[0].toString(),
+                y: this.rawPubKey[1].toString(),
+            };
+        };
+        this.asCircuitInputs = () => {
+            return this.rawPubKey.map((x) => x.toString());
+        };
+        this.asArray = () => {
+            return [
+                this.rawPubKey[0],
+                this.rawPubKey[1],
+            ];
+        };
+        this.serialize = () => {
+            // Blank leaves have pubkey [0, 0], which packPubKey does not support
+            if (BigInt(this.rawPubKey[0]) === BigInt(0) &&
+                BigInt(this.rawPubKey[1]) === BigInt(0)) {
+                return SERIALIZED_PUB_KEY_PREFIX + 'z';
+            }
+            const packed = (0, maci_crypto_1.packPubKey)(this.rawPubKey).toString('hex');
+            return SERIALIZED_PUB_KEY_PREFIX + packed.toString();
+        };
+        assert(rawPubKey.length === 2);
+        assert(rawPubKey[0] < maci_crypto_1.SNARK_FIELD_SIZE);
+        assert(rawPubKey[1] < maci_crypto_1.SNARK_FIELD_SIZE);
+        this.rawPubKey = rawPubKey;
+    }
+}
+exports.PubKey = PubKey;
+PubKey.unserialize = (s) => {
+    // Blank leaves have pubkey [0, 0], which packPubKey does not support
+    if (s === SERIALIZED_PUB_KEY_PREFIX + 'z') {
+        return new PubKey([BigInt(0), BigInt(0)]);
+    }
+    const len = SERIALIZED_PUB_KEY_PREFIX.length;
+    const packed = Buffer.from(s.slice(len), 'hex');
+    return new PubKey((0, maci_crypto_1.unpackPubKey)(packed));
+};
+PubKey.isValidSerializedPubKey = (s) => {
+    const correctPrefix = s.startsWith(SERIALIZED_PUB_KEY_PREFIX);
+    let validValue = false;
+    try {
+        PubKey.unserialize(s);
+        validValue = true;
+    }
+    catch {
+        // comment to make linter happy
+    }
+    return correctPrefix && validValue;
+};
+class Keypair {
+    constructor(privKey) {
+        this.copy = () => {
+            return new Keypair(this.privKey.copy());
+        };
+        if (privKey) {
+            this.privKey = privKey;
+            this.pubKey = new PubKey((0, maci_crypto_1.genPubKey)(privKey.rawPrivKey));
+        }
+        else {
+            const rawKeyPair = (0, maci_crypto_1.genKeypair)();
+            this.privKey = new PrivKey(rawKeyPair.privKey);
+            this.pubKey = new PubKey(rawKeyPair.pubKey);
+        }
+    }
+    static genEcdhSharedKey(privKey, pubKey) {
+        return (0, maci_crypto_1.genEcdhSharedKey)(privKey.rawPrivKey, pubKey.rawPubKey);
+    }
+    equals(keypair) {
+        const equalPrivKey = this.privKey.rawPrivKey === keypair.privKey.rawPrivKey;
+        const equalPubKey = this.pubKey.rawPubKey[0] === keypair.pubKey.rawPubKey[0] &&
+            this.pubKey.rawPubKey[1] === keypair.pubKey.rawPubKey[1];
+        // If this assertion fails, something is very wrong and this function
+        // should not return anything 
+        // XOR is equivalent to: (x && !y) || (!x && y ) 
+        const x = (equalPrivKey && equalPubKey);
+        const y = (!equalPrivKey && !equalPubKey);
+        assert((x && !y) || (!x && y));
+        return equalPrivKey;
+    }
+}
+exports.Keypair = Keypair;
+/*
+ * An encrypted command and signature.
+ */
+class Message {
+    constructor(iv, data) {
+        this.asArray = () => {
+            return [
+                this.iv,
+                ...this.data,
+            ];
+        };
+        this.asContractParam = () => {
+            return {
+                iv: this.iv.toString(),
+                data: this.data.map((x) => x.toString()),
+            };
+        };
+        this.asCircuitInputs = () => {
+            return this.asArray();
+        };
+        this.hash = () => {
+            return (0, maci_crypto_1.hash11)(this.asArray());
+        };
+        this.copy = () => {
+            return new Message(BigInt(this.iv.toString()), this.data.map((x) => BigInt(x.toString())));
+        };
+        assert(data.length === 10);
+        this.iv = iv;
+        this.data = data;
+    }
+}
+exports.Message = Message;
+/*
+ * A leaf in the state tree, which maps public keys to votes
+ */
+class StateLeaf {
+    constructor(pubKey, voteOptionTreeRoot, voiceCreditBalance, nonce) {
+        this.asArray = () => {
+            return [
+                ...this.pubKey.asArray(),
+                this.voteOptionTreeRoot,
+                this.voiceCreditBalance,
+                this.nonce,
+            ];
+        };
+        this.asCircuitInputs = () => {
+            return this.asArray();
+        };
+        this.hash = () => {
+            return (0, maci_crypto_1.hash5)(this.asArray());
+        };
+        this.serialize = () => {
+            const j = {
+                pubKey: this.pubKey.serialize(),
+                voteOptionTreeRoot: this.voteOptionTreeRoot.toString(16),
+                voiceCreditBalance: this.voiceCreditBalance.toString(16),
+                nonce: this.nonce.toString(16),
+            };
+            return Buffer.from(JSON.stringify(j, null, 0), 'utf8').toString('base64');
+        };
+        this.pubKey = pubKey;
+        this.voteOptionTreeRoot = voteOptionTreeRoot;
+        this.voiceCreditBalance = voiceCreditBalance;
+        // The this is the current nonce. i.e. a user who has published 0 valid
+        // command should have this value at 0, and the first command should
+        // have a nonce of 1
+        this.nonce = nonce;
+    }
+    copy() {
+        return new StateLeaf(this.pubKey.copy(), BigInt(this.voteOptionTreeRoot.toString()), BigInt(this.voiceCreditBalance.toString()), BigInt(this.nonce.toString()));
+    }
+    static genBlankLeaf(emptyVoteOptionTreeRoot) {
+        return new StateLeaf(new PubKey(maci_crypto_1.NOTHING_UP_MY_SLEEVE_PUBKEY), emptyVoteOptionTreeRoot, BigInt(0), BigInt(0));
+    }
+    static genRandomLeaf() {
+        return new StateLeaf(new PubKey(maci_crypto_1.NOTHING_UP_MY_SLEEVE_PUBKEY), (0, maci_crypto_1.genRandomSalt)(), (0, maci_crypto_1.genRandomSalt)(), (0, maci_crypto_1.genRandomSalt)());
+    }
+}
+exports.StateLeaf = StateLeaf;
+StateLeaf.unserialize = (serialized) => {
+    const j = JSON.parse(Buffer.from(serialized, 'base64').toString('utf8'));
+    return new StateLeaf(PubKey.unserialize(j.pubKey), BigInt('0x' + j.voteOptionTreeRoot), BigInt('0x' + j.voiceCreditBalance), BigInt('0x' + j.nonce));
+};
+/*
+ * Unencrypted data whose fields include the user's public key, vote etc.
+ */
+class Command {
+    constructor(stateIndex, newPubKey, voteOptionIndex, newVoteWeight, nonce, salt = (0, maci_crypto_1.genRandomSalt)()) {
+        this.copy = () => {
+            return new Command(BigInt(this.stateIndex.toString()), this.newPubKey.copy(), BigInt(this.voteOptionIndex.toString()), BigInt(this.newVoteWeight.toString()), BigInt(this.nonce.toString()), BigInt(this.salt.toString()));
+        };
+        this.asArray = () => {
+            return [
+                this.stateIndex,
+                ...this.newPubKey.asArray(),
+                this.voteOptionIndex,
+                this.newVoteWeight,
+                this.nonce,
+                this.salt,
+            ];
+        };
+        /*
+         * Check whether this command has deep equivalence to another command
+         */
+        this.equals = (command) => {
+            return this.stateIndex == command.stateIndex &&
+                this.newPubKey[0] == command.newPubKey[0] &&
+                this.newPubKey[1] == command.newPubKey[1] &&
+                this.voteOptionIndex == command.voteOptionIndex &&
+                this.newVoteWeight == command.newVoteWeight &&
+                this.nonce == command.nonce &&
+                this.salt == command.salt;
+        };
+        this.hash = () => {
+            return (0, maci_crypto_1.hash11)(this.asArray());
+        };
+        /*
+         * Signs this command and returns a Signature.
+         */
+        this.sign = (privKey) => {
+            return (0, maci_crypto_1.sign)(privKey.rawPrivKey, this.hash());
+        };
+        /*
+         * Returns true if the given signature is a correct signature of this
+         * command and signed by the private key associated with the given public
+         * key.
+         */
+        this.verifySignature = (signature, pubKey) => {
+            return (0, maci_crypto_1.verifySignature)(this.hash(), signature, pubKey.rawPubKey);
+        };
+        /*
+         * Encrypts this command along with a signature to produce a Message.
+         */
+        this.encrypt = (signature, sharedKey) => {
+            const plaintext = [
+                ...this.asArray(),
+                signature.R8[0],
+                signature.R8[1],
+                signature.S,
+            ];
+            const ciphertext = (0, maci_crypto_1.encrypt)(plaintext, sharedKey);
+            const message = new Message(ciphertext.iv, ciphertext.data);
+            return message;
+        };
+        this.stateIndex = stateIndex;
+        this.newPubKey = newPubKey;
+        this.voteOptionIndex = voteOptionIndex;
+        this.newVoteWeight = newVoteWeight;
+        this.nonce = nonce;
+        this.salt = salt;
+    }
+}
+exports.Command = Command;
+/*
+ * Decrypts a Message to produce a Command.
+ */
+Command.decrypt = (message, sharedKey) => {
+    const decrypted = (0, maci_crypto_1.decrypt)(message, sharedKey);
+    const command = new Command(decrypted[0], new PubKey([decrypted[1], decrypted[2]]), decrypted[3], decrypted[4], decrypted[5], decrypted[6]);
+    const signature = {
+        R8: [decrypted[7], decrypted[8]],
+        S: decrypted[9],
+    };
+    return { command, signature };
+};
diff --git a/test/modules/maci-domainobjs.ts b/test/modules/maci-domainobjs.ts
new file mode 100644
index 0000000..0c91e9b
--- /dev/null
+++ b/test/modules/maci-domainobjs.ts
@@ -0,0 +1,514 @@
+const assert = require('assert');
+import {
+    Ciphertext,
+    Plaintext,
+    EcdhSharedKey,
+    Signature,
+    PubKey as RawPubKey,
+    PrivKey as RawPrivKey,
+    encrypt,
+    decrypt,
+    sign,
+    hash5,
+    hash11,
+    verifySignature,
+    genRandomSalt,
+    genKeypair,
+    genPubKey,
+    formatPrivKeyForBabyJub,
+    genEcdhSharedKey,
+    packPubKey,
+    unpackPubKey,
+    SNARK_FIELD_SIZE,
+    NOTHING_UP_MY_SLEEVE_PUBKEY,
+} from './maci-crypto'
+
+const SERIALIZED_PRIV_KEY_PREFIX = 'macisk.'
+
+class PrivKey {
+    public rawPrivKey: RawPrivKey
+
+    constructor (rawPrivKey: RawPrivKey) {
+        this.rawPrivKey = rawPrivKey
+    }
+
+    public copy = (): PrivKey => {
+        return new PrivKey(BigInt(this.rawPrivKey.toString()))
+    }
+
+    public asCircuitInputs = () => {
+        return formatPrivKeyForBabyJub(this.rawPrivKey).toString()
+    }
+
+    public serialize = (): string => {
+        return SERIALIZED_PRIV_KEY_PREFIX + this.rawPrivKey.toString(16)
+    }
+
+    public static unserialize = (s: string): PrivKey => {
+        const x = s.slice(SERIALIZED_PRIV_KEY_PREFIX.length)
+        return new PrivKey(BigInt('0x' + x))
+    }
+
+    public static isValidSerializedPrivKey = (s: string): boolean => {
+        const correctPrefix = s.startsWith(SERIALIZED_PRIV_KEY_PREFIX)
+        const x = s.slice(SERIALIZED_PRIV_KEY_PREFIX.length)
+
+        let validValue = false
+        try {
+            const value = BigInt('0x' + x)
+            validValue = value < SNARK_FIELD_SIZE
+        } catch {
+            // comment to make linter happy 
+        }
+
+        return correctPrefix && validValue
+    }
+}
+
+const SERIALIZED_PUB_KEY_PREFIX = 'macipk.'
+
+class PubKey {
+    public rawPubKey: RawPubKey
+
+    constructor (rawPubKey: RawPubKey) {
+        assert(rawPubKey.length === 2)
+        assert(rawPubKey[0] < SNARK_FIELD_SIZE)
+        assert(rawPubKey[1] < SNARK_FIELD_SIZE)
+        this.rawPubKey = rawPubKey
+    }
+
+    public copy = (): PubKey => {
+
+        return new PubKey([
+            BigInt(this.rawPubKey[0].toString()),
+            BigInt(this.rawPubKey[1].toString()),
+        ])
+    }
+
+    public asContractParam = () => {
+        return { 
+            x: this.rawPubKey[0].toString(),
+            y: this.rawPubKey[1].toString(),
+        }
+    }
+
+    public asCircuitInputs = () => {
+        return this.rawPubKey.map((x) => x.toString())
+    }
+
+    public asArray = (): BigInt[] => {
+        return [
+            this.rawPubKey[0],
+            this.rawPubKey[1],
+        ]
+    }
+
+    public serialize = (): string => {
+        // Blank leaves have pubkey [0, 0], which packPubKey does not support
+        if (
+            BigInt(this.rawPubKey[0]) === BigInt(0) && 
+            BigInt(this.rawPubKey[1]) === BigInt(0)
+        ) {
+            return SERIALIZED_PUB_KEY_PREFIX + 'z'
+        }
+        const packed = packPubKey(this.rawPubKey).toString('hex')
+        return SERIALIZED_PUB_KEY_PREFIX + packed.toString()
+    }
+
+    public static unserialize = (s: string): PubKey => {
+        // Blank leaves have pubkey [0, 0], which packPubKey does not support
+        if (s === SERIALIZED_PUB_KEY_PREFIX + 'z') {
+            return new PubKey([BigInt(0), BigInt(0)])
+        }
+
+        const len = SERIALIZED_PUB_KEY_PREFIX.length
+        const packed = Buffer.from(s.slice(len), 'hex')
+        return new PubKey(unpackPubKey(packed))
+    }
+
+    public static isValidSerializedPubKey = (s: string): boolean => {
+        const correctPrefix = s.startsWith(SERIALIZED_PUB_KEY_PREFIX)
+
+        let validValue = false
+        try {
+            PubKey.unserialize(s)
+            validValue = true
+        } catch {
+            // comment to make linter happy
+        }
+
+        return correctPrefix && validValue
+    }
+}
+
+class Keypair {
+    public privKey: PrivKey
+    public pubKey: PubKey
+
+    constructor (
+        privKey?: PrivKey,
+    ) {
+        if (privKey) {
+            this.privKey = privKey
+            this.pubKey = new PubKey(genPubKey(privKey.rawPrivKey))
+        } else {
+            const rawKeyPair = genKeypair()
+            this.privKey = new PrivKey(rawKeyPair.privKey)
+            this.pubKey = new PubKey(rawKeyPair.pubKey)
+        }
+    }
+
+    public copy = (): Keypair => {
+        return new Keypair(this.privKey.copy())
+    }
+    
+    public static genEcdhSharedKey(
+        privKey: PrivKey,
+        pubKey: PubKey,
+    ) {
+        return genEcdhSharedKey(privKey.rawPrivKey, pubKey.rawPubKey)
+    }
+
+    public equals(
+        keypair: Keypair,
+    ): boolean {
+
+        const equalPrivKey = this.privKey.rawPrivKey === keypair.privKey.rawPrivKey
+        const equalPubKey =
+            this.pubKey.rawPubKey[0] === keypair.pubKey.rawPubKey[0] &&
+            this.pubKey.rawPubKey[1] === keypair.pubKey.rawPubKey[1]
+
+        // If this assertion fails, something is very wrong and this function
+        // should not return anything 
+        // XOR is equivalent to: (x && !y) || (!x && y ) 
+        const x = (equalPrivKey && equalPubKey) 
+        const y = (!equalPrivKey && !equalPubKey) 
+
+        assert((x && !y) || (!x && y))
+
+        return equalPrivKey
+    }
+}
+
+
+interface IStateLeaf {
+    pubKey: PubKey;
+    voteOptionTreeRoot: BigInt;
+    voiceCreditBalance: BigInt;
+    nonce: BigInt;
+}
+
+interface VoteOptionTreeLeaf {
+    votes: BigInt;
+}
+
+/*
+ * An encrypted command and signature.
+ */
+class Message {
+    public iv: BigInt
+    public data: BigInt[]
+
+    constructor (
+        iv: BigInt,
+        data: BigInt[],
+    ) {
+        assert(data.length === 10)
+        this.iv = iv
+        this.data = data
+    }
+
+    private asArray = (): BigInt[] => {
+
+        return [
+            this.iv,
+            ...this.data,
+        ]
+    }
+
+    public asContractParam = () => {
+        return {
+            iv: this.iv.toString(),
+            data: this.data.map((x: BigInt) => x.toString()),
+        }
+    }
+
+    public asCircuitInputs = (): BigInt[] => {
+
+        return this.asArray()
+    }
+
+    public hash = (): BigInt => {
+
+        return hash11(this.asArray())
+    }
+
+    public copy = (): Message => {
+
+        return new Message(
+            BigInt(this.iv.toString()),
+            this.data.map((x: BigInt) => BigInt(x.toString())),
+        )
+    }
+}
+
+/*
+ * A leaf in the state tree, which maps public keys to votes
+ */
+class StateLeaf implements IStateLeaf {
+    public pubKey: PubKey
+    public voteOptionTreeRoot: BigInt
+    public voiceCreditBalance: BigInt
+    public nonce: BigInt
+
+    constructor (
+        pubKey: PubKey,
+        voteOptionTreeRoot: BigInt,
+        voiceCreditBalance: BigInt,
+        nonce: BigInt,
+    ) {
+        this.pubKey = pubKey
+        this.voteOptionTreeRoot = voteOptionTreeRoot
+        this.voiceCreditBalance = voiceCreditBalance
+        // The this is the current nonce. i.e. a user who has published 0 valid
+        // command should have this value at 0, and the first command should
+        // have a nonce of 1
+        this.nonce = nonce
+    }
+
+    public copy(): StateLeaf {
+        return new StateLeaf(
+            this.pubKey.copy(),
+            BigInt(this.voteOptionTreeRoot.toString()),
+            BigInt(this.voiceCreditBalance.toString()),
+            BigInt(this.nonce.toString()),
+        )
+    }
+
+    public static genBlankLeaf(
+        emptyVoteOptionTreeRoot: BigInt,
+    ): StateLeaf {
+        return new StateLeaf(
+            new PubKey(NOTHING_UP_MY_SLEEVE_PUBKEY),
+            emptyVoteOptionTreeRoot,
+            BigInt(0),
+            BigInt(0),
+        )
+    }
+
+    public static genRandomLeaf() {
+        return new StateLeaf(
+            new PubKey(NOTHING_UP_MY_SLEEVE_PUBKEY),
+            genRandomSalt(),
+            genRandomSalt(),
+            genRandomSalt(),
+        )
+    }
+
+    private asArray = (): BigInt[] => {
+
+        return [
+            ...this.pubKey.asArray(),
+            this.voteOptionTreeRoot,
+            this.voiceCreditBalance,
+            this.nonce,
+        ]
+    }
+
+    public asCircuitInputs = (): BigInt[] => {
+
+        return this.asArray()
+    }
+
+    public hash = (): BigInt => {
+
+        return hash5(this.asArray())
+    }
+
+    public serialize = (): string => {
+        const j = {
+            pubKey: this.pubKey.serialize(),
+            voteOptionTreeRoot: this.voteOptionTreeRoot.toString(16),
+            voiceCreditBalance: this.voiceCreditBalance.toString(16),
+            nonce: this.nonce.toString(16),
+        }
+
+        return Buffer.from(JSON.stringify(j, null, 0), 'utf8').toString('base64')
+    }
+
+    static unserialize = (serialized: string): StateLeaf => {
+        const j = JSON.parse(Buffer.from(serialized, 'base64').toString('utf8'))
+        return new StateLeaf(
+            PubKey.unserialize(j.pubKey),
+            BigInt('0x' + j.voteOptionTreeRoot),
+            BigInt('0x' + j.voiceCreditBalance),
+            BigInt('0x' + j.nonce),
+        )
+    }
+}
+
+interface ICommand {
+    stateIndex: BigInt;
+    newPubKey: PubKey;
+    voteOptionIndex: BigInt;
+    newVoteWeight: BigInt;
+    nonce: BigInt;
+
+    sign: (PrivKey) => Signature;
+    encrypt: (EcdhSharedKey, Signature) => Message;
+}
+
+/*
+ * Unencrypted data whose fields include the user's public key, vote etc.
+ */
+class Command implements ICommand {
+    public stateIndex: BigInt
+    public newPubKey: PubKey
+    public voteOptionIndex: BigInt
+    public newVoteWeight: BigInt
+    public nonce: BigInt
+    public salt: BigInt
+
+    constructor (
+        stateIndex: BigInt,
+        newPubKey: PubKey,
+        voteOptionIndex: BigInt,
+        newVoteWeight: BigInt,
+        nonce: BigInt,
+        salt: BigInt = genRandomSalt(),
+    ) {
+        this.stateIndex = stateIndex
+        this.newPubKey = newPubKey
+        this.voteOptionIndex = voteOptionIndex
+        this.newVoteWeight = newVoteWeight
+        this.nonce = nonce
+        this.salt = salt
+    }
+
+    public copy = (): Command => {
+
+        return new Command(
+            BigInt(this.stateIndex.toString()),
+            this.newPubKey.copy(),
+            BigInt(this.voteOptionIndex.toString()),
+            BigInt(this.newVoteWeight.toString()),
+            BigInt(this.nonce.toString()),
+            BigInt(this.salt.toString()),
+        )
+    }
+
+    public asArray = (): BigInt[] => {
+
+        return [
+            this.stateIndex,
+            ...this.newPubKey.asArray(),
+            this.voteOptionIndex,
+            this.newVoteWeight,
+            this.nonce,
+            this.salt,
+        ]
+    }
+
+    /*
+     * Check whether this command has deep equivalence to another command
+     */
+    public equals = (command: Command): boolean => {
+
+        return this.stateIndex == command.stateIndex &&
+            this.newPubKey[0] == command.newPubKey[0] &&
+            this.newPubKey[1] == command.newPubKey[1] &&
+            this.voteOptionIndex == command.voteOptionIndex &&
+            this.newVoteWeight == command.newVoteWeight &&
+            this.nonce == command.nonce &&
+            this.salt == command.salt
+    }
+
+    public hash = (): BigInt => {
+        return hash11(this.asArray())
+    }
+
+    /*
+     * Signs this command and returns a Signature.
+     */
+    public sign = (
+        privKey: PrivKey,
+    ): Signature => {
+
+        return sign(privKey.rawPrivKey, this.hash())
+    }
+
+    /*
+     * Returns true if the given signature is a correct signature of this
+     * command and signed by the private key associated with the given public
+     * key.
+     */
+    public verifySignature = (
+        signature: Signature,
+        pubKey: PubKey,
+    ): boolean => {
+
+        return verifySignature(
+            this.hash(),
+            signature,
+            pubKey.rawPubKey,
+        )
+    }
+
+    /*
+     * Encrypts this command along with a signature to produce a Message.
+     */
+    public encrypt = (
+        signature: Signature,
+        sharedKey: EcdhSharedKey,
+    ): Message => {
+
+        const plaintext: Plaintext = [
+            ...this.asArray(),
+            signature.R8[0],
+            signature.R8[1],
+            signature.S,
+        ]
+
+        const ciphertext: Ciphertext = encrypt(plaintext, sharedKey)
+        const message = new Message(ciphertext.iv, ciphertext.data)
+        
+        return message
+    }
+
+    /*
+     * Decrypts a Message to produce a Command.
+     */
+    public static decrypt = (
+        message: Message,
+        sharedKey: EcdhSharedKey,
+    ) => {
+
+        const decrypted = decrypt(message, sharedKey)
+
+        const command = new Command(
+            decrypted[0],
+            new PubKey([decrypted[1], decrypted[2]]),
+            decrypted[3],
+            decrypted[4],
+            decrypted[5],
+            decrypted[6],
+        )
+
+        const signature = {
+            R8: [decrypted[7], decrypted[8]],
+            S: decrypted[9],
+        }
+
+        return { command, signature }
+    }
+}
+
+export {
+    StateLeaf,
+    VoteOptionTreeLeaf,
+    Command,
+    Message,
+    Keypair,
+    PubKey,
+    PrivKey,
+}
\ No newline at end of file
diff --git a/test/modules/src/babyjub.js b/test/modules/src/babyjub.js
new file mode 100644
index 0000000..6651571
--- /dev/null
+++ b/test/modules/src/babyjub.js
@@ -0,0 +1,128 @@
+const F1Field = require("ffjavascript").F1Field;
+const Scalar = require("ffjavascript").Scalar;
+const utils = require("ffjavascript").utils;
+
+exports.addPoint = addPoint;
+exports.mulPointEscalar = mulPointEscalar;
+exports.inCurve = inCurve;
+exports.inSubgroup = inSubgroup;
+exports.packPoint = packPoint;
+exports.unpackPoint = unpackPoint;
+
+
+exports.p = Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617");
+const F = new F1Field(exports.p);
+exports.F = F;
+
+exports.Generator = [
+    F.e("995203441582195749578291179787384436505546430278305826713579947235728471134"),
+    F.e("5472060717959818805561601436314318772137091100104008585924551046643952123905")
+];
+exports.Base8 = [
+    F.e("5299619240641551281634865583518297030282874472190772894086521144482721001553"),
+    F.e("16950150798460657717958625567821834550301663161624707787222815936182638968203")
+];
+exports.order = Scalar.fromString("21888242871839275222246405745257275088614511777268538073601725287587578984328");
+exports.subOrder = Scalar.shiftRight(exports.order, 3);
+exports.A = F.e("168700");
+exports.D = F.e("168696");
+
+
+function addPoint(a,b) {
+
+    const res = [];
+
+    /* does the equivalent of:
+     res[0] = bigInt((a[0]*b[1] + b[0]*a[1]) *  bigInt(bigInt("1") + d*a[0]*b[0]*a[1]*b[1]).inverse(q)).affine(q);
+    res[1] = bigInt((a[1]*b[1] - cta*a[0]*b[0]) * bigInt(bigInt("1") - d*a[0]*b[0]*a[1]*b[1]).inverse(q)).affine(q);
+    */
+
+    const beta = F.mul(a[0],b[1]);
+    const gamma = F.mul(a[1],b[0]);
+    const delta = F.mul(
+        F.sub(a[1], F.mul(exports.A, a[0])),
+        F.add(b[0], b[1])
+    );
+    const tau = F.mul(beta, gamma);
+    const dtau = F.mul(exports.D, tau);
+
+    res[0] = F.div(
+        F.add(beta, gamma),
+        F.add(F.one, dtau)
+    );
+
+    res[1] = F.div(
+        F.add(delta, F.sub(F.mul(exports.A,beta), gamma)),
+        F.sub(F.one, dtau)
+    );
+
+    return res;
+}
+
+function mulPointEscalar(base, e) {
+    let res = [F.e("0"),F.e("1")];
+    let rem = e;
+    let exp = base;
+
+    while (! Scalar.isZero(rem)) {
+        if (Scalar.isOdd(rem)) {
+            res = addPoint(res, exp);
+        }
+        exp = addPoint(exp, exp);
+        rem = Scalar.shiftRight(rem, 1);
+    }
+
+    return res;
+}
+
+function inSubgroup(P) {
+    if (!inCurve(P)) return false;
+    const res= mulPointEscalar(P, exports.subOrder);
+    return (F.isZero(res[0]) && F.eq(res[1], F.one));
+}
+
+function inCurve(P) {
+
+    const x2 = F.square(P[0]);
+    const y2 = F.square(P[1]);
+
+    if (!F.eq(
+        F.add(F.mul(exports.A, x2), y2),
+        F.add(F.one, F.mul(F.mul(x2, y2), exports.D)))) return false;
+
+    return true;
+}
+
+function packPoint(P) {
+    const buff = utils.leInt2Buff(P[1], 32);
+    if (F.lt(P[0], F.zero)) {
+        buff[31] = buff[31] | 0x80;
+    }
+    return buff;
+}
+
+function unpackPoint(_buff) {
+    const buff = Buffer.from(_buff);
+    let sign = false;
+    const P = new Array(2);
+    if (buff[31] & 0x80) {
+        sign = true;
+        buff[31] = buff[31] & 0x7F;
+    }
+    P[1] = utils.leBuff2int(buff);
+    if (Scalar.gt(P[1], exports.p)) return null;
+
+    const y2 = F.square(P[1]);
+
+    let x = F.sqrt(F.div(
+        F.sub(F.one, y2),
+        F.sub(exports.A, F.mul(exports.D, y2))));
+
+    if (x == null) return null;
+
+    if (sign) x = F.neg(x);
+
+    P[0] = x;
+
+    return P;
+}
diff --git a/test/modules/src/eddsa.js b/test/modules/src/eddsa.js
new file mode 100644
index 0000000..3edad47
--- /dev/null
+++ b/test/modules/src/eddsa.js
@@ -0,0 +1,228 @@
+const createBlakeHash = require("blake-hash");
+const Scalar = require("ffjavascript").Scalar;
+const F1Field = require("ffjavascript").F1Field;
+const babyJub = require("./babyjub");
+const utils = require("ffjavascript").utils;
+const pedersenHash = require("./pedersenHash").hash;
+const mimc7 = require("./mimc7");
+const poseidon = require("./poseidon.js");
+const mimcsponge = require("./mimcsponge");
+
+
+exports.prv2pub= prv2pub;
+exports.sign = sign;
+exports.signMiMC = signMiMC;
+exports.signPoseidon = signPoseidon;
+exports.signMiMCSponge = signMiMCSponge;
+exports.verify = verify;
+exports.verifyMiMC = verifyMiMC;
+exports.verifyPoseidon = verifyPoseidon;
+exports.verifyMiMCSponge = verifyMiMCSponge;
+exports.packSignature = packSignature;
+exports.unpackSignature = unpackSignature;
+exports.pruneBuffer = pruneBuffer;
+
+
+function pruneBuffer(_buff) {
+    const buff = Buffer.from(_buff);
+    buff[0] = buff[0] & 0xF8;
+    buff[31] = buff[31] & 0x7F;
+    buff[31] = buff[31] | 0x40;
+    return buff;
+}
+
+function prv2pub(prv) {
+    const sBuff = pruneBuffer(createBlakeHash("blake512").update(prv).digest().slice(0,32));
+    let s = utils.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, Scalar.shr(s,3));
+    return A;
+}
+
+function sign(prv, msg) {
+    const h1 = createBlakeHash("blake512").update(prv).digest();
+    const sBuff = pruneBuffer(h1.slice(0,32));
+    const s = utils.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, Scalar.shr(s, 3));
+
+    const rBuff = createBlakeHash("blake512").update(Buffer.concat([h1.slice(32,64), msg])).digest();
+    let r = utils.leBuff2int(rBuff);
+    const Fr = new F1Field(babyJub.subOrder);
+    r = Fr.e(r);
+    const R8 = babyJub.mulPointEscalar(babyJub.Base8, r);
+    const R8p = babyJub.packPoint(R8);
+    const Ap = babyJub.packPoint(A);
+    const hmBuff = pedersenHash(Buffer.concat([R8p, Ap, msg]));
+    const hm = utils.leBuff2int(hmBuff);
+    const S = Fr.add(r , Fr.mul(hm, s));
+    return {
+        R8: R8,
+        S: S
+    };
+}
+
+function signMiMC(prv, msg) {
+    const h1 = createBlakeHash("blake512").update(prv).digest();
+    const sBuff = pruneBuffer(h1.slice(0,32));
+    const s = utils.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, Scalar.shr(s, 3));
+
+    const msgBuff = utils.leInt2Buff(msg, 32);
+    const rBuff = createBlakeHash("blake512").update(Buffer.concat([h1.slice(32,64), msgBuff])).digest();
+    let r = utils.leBuff2int(rBuff);
+    const Fr = new F1Field(babyJub.subOrder);
+    r = Fr.e(r);
+    const R8 = babyJub.mulPointEscalar(babyJub.Base8, r);
+    const hm = mimc7.multiHash([R8[0], R8[1], A[0], A[1], msg]);
+    const S = Fr.add(r , Fr.mul(hm, s));
+    return {
+        R8: R8,
+        S: S
+    };
+}
+
+function signMiMCSponge(prv, msg) {
+    const h1 = createBlakeHash("blake512").update(prv).digest();
+    const sBuff = pruneBuffer(h1.slice(0,32));
+    const s = utils.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, Scalar.shr(s, 3));
+
+    const msgBuff = utils.leInt2Buff(msg, 32);
+    const rBuff = createBlakeHash("blake512").update(Buffer.concat([h1.slice(32,64), msgBuff])).digest();
+    let r = utils.leBuff2int(rBuff);
+    const Fr = new F1Field(babyJub.subOrder);
+    r = Fr.e(r);
+    const R8 = babyJub.mulPointEscalar(babyJub.Base8, r);
+    const hm = mimcsponge.multiHash([R8[0], R8[1], A[0], A[1], msg]);
+    const S = Fr.add(r , Fr.mul(hm, s));
+    return {
+        R8: R8,
+        S: S
+    };
+}
+
+function signPoseidon(prv, msg) {
+    const h1 = createBlakeHash("blake512").update(prv).digest();
+    const sBuff = pruneBuffer(h1.slice(0,32));
+    const s = utils.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, Scalar.shr(s, 3));
+
+    const msgBuff = utils.leInt2Buff(msg, 32);
+    const rBuff = createBlakeHash("blake512").update(Buffer.concat([h1.slice(32,64), msgBuff])).digest();
+    let r = utils.leBuff2int(rBuff);
+    const Fr = new F1Field(babyJub.subOrder);
+    r = Fr.e(r);
+    const R8 = babyJub.mulPointEscalar(babyJub.Base8, r);
+    const hm = poseidon([R8[0], R8[1], A[0], A[1], msg]);
+    const S = Fr.add(r , Fr.mul(hm, s));
+    return {
+        R8: R8,
+        S: S
+    };
+}
+
+function verify(msg, sig, A) {
+    // Check parameters
+    if (typeof sig != "object") return false;
+    if (!Array.isArray(sig.R8)) return false;
+    if (sig.R8.length!= 2) return false;
+    if (!babyJub.inCurve(sig.R8)) return false;
+    if (!Array.isArray(A)) return false;
+    if (A.length!= 2) return false;
+    if (!babyJub.inCurve(A)) return false;
+    if (sig.S>= babyJub.subOrder) return false;
+
+    const R8p = babyJub.packPoint(sig.R8);
+    const Ap = babyJub.packPoint(A);
+    const hmBuff = pedersenHash(Buffer.concat([R8p, Ap, msg]));
+    const hm = utils.leBuff2int(hmBuff);
+
+    const Pleft = babyJub.mulPointEscalar(babyJub.Base8, sig.S);
+    let Pright = babyJub.mulPointEscalar(A, Scalar.mul(hm,8));
+    Pright = babyJub.addPoint(sig.R8, Pright);
+
+    if (!babyJub.F.eq(Pleft[0],Pright[0])) return false;
+    if (!babyJub.F.eq(Pleft[1],Pright[1])) return false;
+    return true;
+}
+
+function verifyMiMC(msg, sig, A) {
+    // Check parameters
+    if (typeof sig != "object") return false;
+    if (!Array.isArray(sig.R8)) return false;
+    if (sig.R8.length!= 2) return false;
+    if (!babyJub.inCurve(sig.R8)) return false;
+    if (!Array.isArray(A)) return false;
+    if (A.length!= 2) return false;
+    if (!babyJub.inCurve(A)) return false;
+    if (sig.S>= babyJub.subOrder) return false;
+
+    const hm = mimc7.multiHash([sig.R8[0], sig.R8[1], A[0], A[1], msg]);
+
+    const Pleft = babyJub.mulPointEscalar(babyJub.Base8, sig.S);
+    let Pright = babyJub.mulPointEscalar(A, Scalar.mul(hm, 8));
+    Pright = babyJub.addPoint(sig.R8, Pright);
+
+    if (!babyJub.F.eq(Pleft[0],Pright[0])) return false;
+    if (!babyJub.F.eq(Pleft[1],Pright[1])) return false;
+    return true;
+}
+
+
+function verifyPoseidon(msg, sig, A) {
+    // Check parameters
+    if (typeof sig != "object") return false;
+    if (!Array.isArray(sig.R8)) return false;
+    if (sig.R8.length!= 2) return false;
+    if (!babyJub.inCurve(sig.R8)) return false;
+    if (!Array.isArray(A)) return false;
+    if (A.length!= 2) return false;
+    if (!babyJub.inCurve(A)) return false;
+    if (sig.S>= babyJub.subOrder) return false;
+
+    const hm = poseidon([sig.R8[0], sig.R8[1], A[0], A[1], msg]);
+
+    const Pleft = babyJub.mulPointEscalar(babyJub.Base8, sig.S);
+    let Pright = babyJub.mulPointEscalar(A, Scalar.mul(hm, 8));
+    Pright = babyJub.addPoint(sig.R8, Pright);
+
+    if (!babyJub.F.eq(Pleft[0],Pright[0])) return false;
+    if (!babyJub.F.eq(Pleft[1],Pright[1])) return false;
+    return true;
+}
+
+function verifyMiMCSponge(msg, sig, A) {
+    // Check parameters
+    if (typeof sig != "object") return false;
+    if (!Array.isArray(sig.R8)) return false;
+    if (sig.R8.length!= 2) return false;
+    if (!babyJub.inCurve(sig.R8)) return false;
+    if (!Array.isArray(A)) return false;
+    if (A.length!= 2) return false;
+    if (!babyJub.inCurve(A)) return false;
+    if (sig.S>= babyJub.subOrder) return false;
+
+    const hm = mimcsponge.multiHash([sig.R8[0], sig.R8[1], A[0], A[1], msg]);
+
+    const Pleft = babyJub.mulPointEscalar(babyJub.Base8, sig.S);
+    let Pright = babyJub.mulPointEscalar(A, hm.times(bigInt("8")));
+    Pright = babyJub.addPoint(sig.R8, Pright);
+
+    if (!babyJub.F.eq(Pleft[0],Pright[0])) return false;
+    if (!babyJub.F.eq(Pleft[1],Pright[1])) return false;
+    return true;
+}
+
+function packSignature(sig) {
+    const R8p = babyJub.packPoint(sig.R8);
+    const Sp = utils.leInt2Buff(sig.S, 32);
+    return Buffer.concat([R8p, Sp]);
+}
+
+function unpackSignature(sigBuff) {
+    return {
+        R8: babyJub.unpackPoint(sigBuff.slice(0,32)),
+        S: utils.leBuff2int(sigBuff.slice(32,64))
+    };
+}
+
+
diff --git a/test/modules/src/evmasm.js b/test/modules/src/evmasm.js
new file mode 100644
index 0000000..ab7f830
--- /dev/null
+++ b/test/modules/src/evmasm.js
@@ -0,0 +1,208 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+
+const Web3Utils = require("web3-utils");
+
+class Contract {
+    constructor() {
+        this.code = [];
+        this.labels = {};
+        this.pendingLabels = {};
+    }
+
+    createTxData() {
+        let C;
+
+        // Check all labels are defined
+        const pendingLabels = Object.keys(this.pendingLabels);
+        if (pendingLabels.length>0) {
+            throw new Error("Lables not defined: "+ pendingLabels.join(", "));
+        }
+
+        let setLoaderLength = 0;
+        let genLoadedLength = -1;
+
+        while  (genLoadedLength!=setLoaderLength) {
+            setLoaderLength = genLoadedLength;
+            C = new module.exports();
+            C.codesize();
+            C.push(setLoaderLength);
+            C.push(0);
+            C.codecopy();
+
+            C.push(this.code.length);
+            C.push(0);
+            C.return();
+            genLoadedLength = C.code.length;
+        }
+
+        return Web3Utils.bytesToHex(C.code.concat(this.code));
+    }
+
+    stop() { this.code.push(0x00); }
+    add()  { this.code.push(0x01); }
+    mul()  { this.code.push(0x02); }
+    sub()  { this.code.push(0x03); }
+    div()  { this.code.push(0x04); }
+    sdiv() { this.code.push(0x05); }
+    mod()  { this.code.push(0x06); }
+    smod()  { this.code.push(0x07); }
+    addmod()  { this.code.push(0x08); }
+    mulmod()  { this.code.push(0x09); }
+    exp()  { this.code.push(0x0a); }
+    signextend()  { this.code.push(0x0b); }
+
+    lt()   { this.code.push(0x10); }
+    gt()   { this.code.push(0x11); }
+    slt()  { this.code.push(0x12); }
+    sgt()  { this.code.push(0x13); }
+    eq()   { this.code.push(0x14); }
+    iszero()  { this.code.push(0x15); }
+    and()  { this.code.push(0x16); }
+    or()  { this.code.push(0x17); }
+    shor()  { this.code.push(0x18); }
+    not()  { this.code.push(0x19); }
+    byte()  { this.code.push(0x1a); }
+
+    keccak() { this.code.push(0x20); }
+    sha3() { this.code.push(0x20); }   // alias
+
+    address()  { this.code.push(0x30); }
+    balance()  { this.code.push(0x31); }
+    origin()  { this.code.push(0x32); }
+    caller()  { this.code.push(0x33); }
+    callvalue()  { this.code.push(0x34); }
+    calldataload()  { this.code.push(0x35); }
+    calldatasize()  { this.code.push(0x36); }
+    calldatacopy()  { this.code.push(0x37); }
+    codesize()  { this.code.push(0x38); }
+    codecopy()  { this.code.push(0x39); }
+    gasprice()  { this.code.push(0x3a); }
+    extcodesize()  { this.code.push(0x3b); }
+    extcodecopy()  { this.code.push(0x3c); }
+    returndatasize()  { this.code.push(0x3d); }
+    returndatacopy()  { this.code.push(0x3e); }
+
+    blockhash()  { this.code.push(0x40); }
+    coinbase()  { this.code.push(0x41); }
+    timestamp()  { this.code.push(0x42); }
+    number()  { this.code.push(0x43); }
+    difficulty()  { this.code.push(0x44); }
+    gaslimit()  { this.code.push(0x45); }
+
+    pop()  { this.code.push(0x50); }
+    mload()  { this.code.push(0x51); }
+    mstore()  { this.code.push(0x52); }
+    mstore8()  { this.code.push(0x53); }
+    sload()  { this.code.push(0x54); }
+    sstore()  { this.code.push(0x55); }
+
+    _pushLabel(label) {
+        if (typeof this.labels[label] != "undefined") {
+            this.push(this.labels[label]);
+        } else {
+            this.pendingLabels[label] = this.pendingLabels[label] || [];
+            this.pendingLabels[label].push(this.code.length);
+            this.push("0x000000");
+        }
+    }
+
+    _fillLabel(label) {
+        if (!this.pendingLabels[label]) return;
+
+        let dst = this.labels[label];
+
+        const dst3 = [dst >> 16, (dst >> 8) & 0xFF, dst & 0xFF];
+
+        this.pendingLabels[label].forEach((p) => {
+            for (let i=0; i<3; i++) {
+                this.code[p+i+1] = dst3[i];
+            }
+        });
+
+        delete this.pendingLabels[label];
+    }
+
+
+    jmp(label)  {
+        if (typeof label !== "undefined") {
+            this._pushLabel(label);
+        }
+        this.code.push(0x56);
+    }
+
+    jmpi(label)  {
+        if (typeof label !== "undefined") {
+            this._pushLabel(label);
+        }
+        this.code.push(0x57);
+    }
+
+    pc()  { this.code.push(0x58); }
+    msize()  { this.code.push(0x59); }
+    gas()  { this.code.push(0x5a); }
+    label(name)  {
+        if (typeof this.labels[name] != "undefined") {
+            throw new Error("Label already defined");
+        }
+        this.labels[name] = this.code.length;
+        this.code.push(0x5b);
+
+        this._fillLabel(name);
+    }
+
+    push(data) {
+        if (typeof data === "number") {
+            let isNeg;
+            if (data<0) {
+                isNeg = true;
+                data = -data;
+            }
+            data = data.toString(16);
+            if (data.length % 2 == 1) data = "0" + data;
+            data = "0x" + data;
+            if (isNeg) data = "-"+data;
+        }
+        const d = Web3Utils.hexToBytes(Web3Utils.toHex(data));
+        if (d.length == 0 || d.length > 32) {
+            throw new Error("Assertion failed");
+        }
+        this.code = this.code.concat([0x5F + d.length], d);
+    }
+
+    dup(n) {
+        if (n < 0 || n >= 16) {
+            throw new Error("Assertion failed");
+        }
+        this.code.push(0x80 + n);
+    }
+
+    swap(n) {
+        if (n < 1 || n > 16) {
+            throw new Error("Assertion failed");
+        }
+        this.code.push(0x8f + n);
+    }
+
+    log0()  { this.code.push(0xa0); }
+    log1()  { this.code.push(0xa1); }
+    log2()  { this.code.push(0xa2); }
+    log3()  { this.code.push(0xa3); }
+    log4()  { this.code.push(0xa4); }
+
+    create()  { this.code.push(0xf0); }
+    call()  { this.code.push(0xf1); }
+    callcode()  { this.code.push(0xf2); }
+    return()  { this.code.push(0xf3); }
+    delegatecall()  { this.code.push(0xf4); }
+
+    staticcall()  { this.code.push(0xfa); }
+    revert()  { this.code.push(0xfd); }
+    invalid()  { this.code.push(0xfe); }
+    selfdestruct()  { this.code.push(0xff); }
+}
+
+module.exports = Contract;
+
diff --git a/test/modules/src/g2_gencontract.js b/test/modules/src/g2_gencontract.js
new file mode 100644
index 0000000..9ed1698
--- /dev/null
+++ b/test/modules/src/g2_gencontract.js
@@ -0,0 +1,582 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+const Contract = require("./evmasm");
+const G2 = require("snarkjs").bn128.G2;
+
+
+function toHex256(a) {
+    let S = a.toString(16);
+    while (S.length < 64) S="0"+S;
+    return "0x" + S;
+}
+
+function createCode(P, w) {
+
+    const C = new Contract();
+
+    const NPOINTS = 1 << (w-1);
+
+    const VAR_POS = C.allocMem(32);
+    const VAR_POINTS = C.allocMem( (NPOINTS)*4*32);
+    const savedP = C.allocMem(32);
+    const savedZ3 = C.allocMem(32);
+
+    // Check selector
+    C.push("0x0100000000000000000000000000000000000000000000000000000000");
+    C.push(0);
+    C.calldataload();
+    C.div();
+    C.push("b65c7c74"); // mulexp(uint256)
+    C.eq();
+    C.jmpi("start");
+    C.invalid();
+
+    C.label("start");
+
+    storeVals();
+
+    C.push( Math.floor(255/w)*w  );                // pos := 255
+    C.push(VAR_POS);
+    C.mstore();
+
+    C.push("21888242871839275222246405745257275088696311157297823662689037894645226208583");
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+
+    C.label("begin_loop");      // ACC_X ACC_Y ACC_Z q
+
+    C.internalCall("double");
+
+    // g = (e>>pos)&MASK
+    C.push(4);
+    C.calldataload();           // e ACC_X ACC_Y ACC_Z q
+
+    C.push(VAR_POS);
+    C.mload();                  // pos e ACC_X ACC_Y ACC_Z q
+    C.shr();
+
+    C.push(NPOINTS-1);
+    C.and();                    // g ACC_X ACC_Y ACC_Z q
+
+    C.internalCall("add");      // acc_x acc_y acc_z
+
+    C.push(VAR_POS);
+    C.mload();                  // pos acc_x acc_y acc_z
+    C.dup(0);                   // pos pos acc_x acc_y acc_z
+    C.push(0);                  // 0 pos pos acc_x acc_y acc_z
+    C.eq();                     // eq pos acc_x acc_y acc_z
+    C.jmpi("after_loop");       // pos acc_x acc_y acc_z
+    C.push(w);                  // 5 pos acc_x acc_y acc_z
+    C.sub();                    // pos acc_x acc_y acc_z
+    C.push(VAR_POS);
+    C.mstore();                 // acc_x acc_y acc_z
+    C.jmp("begin_loop");
+    C.label("after_loop");      // pos acc_x acc_y acc_z
+    C.pop();                    // acc_x acc_y acc_z
+
+    C.internalCall("affine");   // acc_x acc_y
+
+    C.push(0);
+    C.mstore();
+    C.push(20);
+    C.mstore();
+    C.push(40);
+    C.mstore();
+    C.push(60);
+    C.mstore();
+
+    C.push("0x80");
+    C.push("0x00");
+    C.return();
+
+
+    double();
+    addPoint();
+    affine();
+
+    return C.createTxData();
+
+    function add(a,b,q) {
+        C.dup(q);
+        C.dup(a+1 + 1);
+        C.dup(b+1 + 2);
+        C.addmod();
+        C.dup(q + 1);
+        C.dup(a + 2);
+        C.dup(b + 3);
+        C.addmod();
+    }
+
+    function sub(a,b,q) {
+        C.dup(q);           // q
+        C.dup(a+1 + 1);     // ai q
+        C.dub(q + 2);       // q ai q
+        C.dup(b+1 + 3);     // bi q ai q
+        C.sub();            // -bi ai q
+        C.addmod();         // ci
+        C.dup(q + 1);       // q ci
+        C.dup(a + 2);       // ar q ci
+        C.dup(q + 3);       // q ar q ci
+        C.dup(b + 4);       // br q ar q ci
+        C.sub();            // -br ar q ci
+        C.addmod();         // cr ci
+    }
+
+    function mul(a, b, q) {
+        C.dup(q);           //  q
+        C.dup(q + 1);       //  q q
+        C.dup(a + 2);       //  ar q q
+        C.dup(b+1 + 3);     //  bi ar q q
+        C.mulmod();         //  ci1 q
+        C.dup(q + 2);       //  q ci1 q
+        C.dup(a+1 + 3);     //  ai q ci1 q
+        C.dup(b + 4);       //  ar ai q ci1 q
+        C.mulmod();         //  ci2 ci1 q
+        C.addmod();         //  ci
+        C.dup(q + 1);       //  q ci
+        C.dup(q + 2);       //  q q ci
+        C.dup(q + 3);       //  q q q ci
+        C.dup(a+1 + 4);     //  ai q q ci
+        C.dup(b+1 + 5);     //  bi ai q q ci
+        C.mulmod();         //  cr2 q q ci
+        C.sub();            //  -cr2 q ci
+        C.dup(q + 3);       //  q -cr2 q ci
+        C.dup(a + 4);       //  ar q -cr2 q ci
+        C.dup(b + 5);       //  br ar q -cr2 q ci
+        C.mulmod();         //  cr1 -cr2 q ci
+        C.addmod();         //  cr ci
+    }
+
+    function square(a, q) {
+        C.dup(q);           //  q
+        C.dup(q + 1);       //  q q
+        C.dup(a + 2);       //  ar q q
+        C.dup(a+1 + 3);     //  ai ar q q
+        C.mulmod();         //  arai q
+        C.dup(0);           //  arai arai q
+        C.addmod();         //  ci
+        C.dup(q + 1);       //  q ci
+        C.dup(q + 2);       //  q q ci
+        C.dup(q + 3);       //  q q q ci
+        C.dup(a+1 + 4);     //  ai q q ci
+        C.dup(a+1 + 5);     //  ai ai q q ci
+        C.mulmod();         //  cr2 q q ci
+        C.sub();            //  -cr2 q ci
+        C.dup(q + 3);       //  q -cr2 q ci
+        C.dup(a + 4);       //  ar q -cr2 q ci
+        C.dup(a + 5);       //  br ar q -cr2 q ci
+        C.mulmod();         //  cr1 -cr2 q ci
+        C.addmod();         //  cr ci
+    }
+
+    function add1(a, q) {
+        C.dup(a+1);         // im
+        C.dup(1 + q);       //  q
+        C.dup(2 + a);       //  re q im
+        C.push(1);          // 1 re q im
+        C.addmod();
+    }
+
+    function cmp(a, b) {
+        C.dup(a);
+        C.dup(b);
+        C.eq();
+        C.dup(a+1);
+        C.dup(a+1);
+        C.and();
+    }
+
+    function rm(a) {
+        if (a>0) C.swap(a);
+        C.pop();
+        if (a>0) C.swap(a);
+        C.pop();
+    }
+
+    function double() {
+        C.label("double");       // xR, xI,    yR, yI,   zR zI, q
+
+        C.dup(4);
+        C.iszero();
+        C.dup(6);
+        C.iszero();
+        C.and();
+        C.jumpi("enddouble");   // X Y Z q
+
+
+        // Z3 = 2*Y*Z // Remove Z
+        mul(2, 4, 6);           // yz X Y Z q
+        rm(6);                  // X Y yz q
+
+        add(4, 4, 6);           // 2yz X Y yz q
+        rm(6);                  // X Y Z3 q
+
+        // A = X^2
+        square(0,6);               // A X Y Z3 q
+
+        // B = Y^2  // Remove Y
+        square(4,8);              // B A X Y Z3 q
+        rm(6);                  // A X B Z3 q
+
+        // C = B^2
+        square(4,8);               // C A X B Z3 q
+
+        // D = (X+B)^2-A-C // Remove X, Remove B
+        add(4,6, 10);           // X+B C A X B Z3 q
+        rm(6);                  // C A X+B B Z3 q
+        rm(6);                  // A X+B C Z3 q
+        square(2,8);            // (X+B)^2 A X+B C Z3 q
+        rm(4);                  // A (X+B)^2 C Z3 q
+        sub(2, 0, 8);           // (X+B)^2-A A (X+B)^2 C Z3 q
+        rm(4);                  // A (X+B)^2-A C Z3 q
+        sub(2, 4, 8);           // (X+B)^2-A-C A (X+B)^2-A C Z3 q
+        rm(4);                  // A D C Z3 q
+
+        // D = D+D
+        add(2,2, 8);            // D+D A D C Z3 q
+        rm(4);                  // A D C Z3 q
+
+        // E=A+A+A
+        add(0, 0, 8);           // 2A A D C Z3 q
+        add(0, 2, 10);          // 3A 2A A D C Z3 q
+        rm(4);                  // 2A 3A D C Z3 q
+        rm(0);                  // E D C Z3 q
+
+        // F=E^2
+        square(0, 8);           // F E D C Z3 q
+
+        // X3= F - 2*D  // Remove F
+        add(4, 4, 10);          // 2D F E D C Z3 q
+        sub(2, 0, 12);          // F-2D 2D F E D C Z3 q
+        rm(4);                  // 2D X3 E D C Z3 q
+        rm(0);                  // X3 E D C Z3 q
+
+        // Y3 = E * (D - X3) - 8 * C  // Remove D C  E
+
+        sub(4, 0, 10);          // D-X3 X3 E D C Z3 q
+        rm(6);                  // X3 E D-X3 C Z3 q
+        mul(2, 4, 10);          // E*(D-X3) X3 E D-X3 C Z3 q
+        rm(6);                  // X3 E E*(D-X3) C Z3 q
+        rm(2);                  // X3 E*(D-X3) C Z3 q
+        add(4, 4, 8);           // 2C X3 E*(D-X3) C Z3 q
+        rm(6);                  // X3 E*(D-X3) 2C Z3 q
+        add(4, 4, 8);           // 4C X3 E*(D-X3) 2C Z3 q
+        rm(6);                  // X3 E*(D-X3) 4C Z3 q
+        add(4, 4, 8);           // 8C X3 E*(D-X3) 4C Z3 q
+        rm(6);                  // X3 E*(D-X3) 8C Z3 q
+        sub(2, 4, 8);           // E*(D-X3)-8C X3 E*(D-X3) 8C Z3 q
+        rm(6);                  // X3 E*(D-X3) Y3 Z3 q
+        rm(2);                  // X3 Y3 Z3 q
+
+        C.label("enddouble");
+        C.returnCall();
+    }
+
+    function addPoint() {     // p, xR, xI,    yR, yI,   zR zI, q
+
+
+        C.dup(0);           // p p X2 Y2 Z2 q
+
+        C.push(savedP);
+        C.mstore();
+
+        C.iszero();         // X2 Y2 Z2 q
+        C.jumpi("endpadd");
+
+
+        C.dup(4);
+        C.iszero();
+        C.dup(6);
+        C.iszero();
+        C.and();
+        C.jumpi("returnP");   // X2 Y2 Z2 q
+
+
+
+        // lastZ3 = (Z2+1)^2 - Z2^2
+        add1(4, 6);         // Z2+1 X2 Y2 Z2 q
+        square(0, 8);       // (Z2+1)^2 Z2+1 X2 Y2 Z2 q
+        rm(2);              // (Z2+1)^2 X2 Y2 Z2 q
+        square(6, 8);       // Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+
+
+        sub(2, 0, 10);      // (Z2+1)^2-Z2^2 Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+
+        saveZ3();           // Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+        rm(2);              // Z2^2 X2 Y2 Z2 q
+
+        // U2 = X2
+        // S2 = Y2          // Z2^2 U2 S2 Z2 q
+
+
+        // U1 = X1 * Z2^2
+        loadX();            // X1 Z2^2 U2 S2 Z2 q
+        mul(0, 2, 10);      // X1*Z2^2 X1 Z2^2 U2 S2 Z2 q
+        rm(2);              // X1*Z2^2 Z2^2 U2 S2 Z2 q
+
+
+        mul(2, 8, 10);      // Z2^3 U1 Z2^2 U2 S2 Z2 q
+        rm(4);              // U1 Z2^3 U2 S2 Z2 q
+        rm(8);              // Z2^3 U2 S2 U1 q
+
+        // S1 = Y1 * Z1^3
+        loadY();            // Y1 Z2^3 U2 S2 U1 q
+        mul(0, 2, 10);      // S1 Y1 Z2^3 U2 S2 U1 q
+        rm(4);              // Y1 S1 U2 S2 U1 q
+        rm(0);              // S1 U2 S2 U1 q
+
+        cmp(0, 4);          // c1 S1 U2 S2 U1 q
+        cmp(3, 7);          // c2 c1 S1 U2 S2 U1 q
+        C.and();            // c2&c1 S1 U2 S2 U1 q
+        C.jumpi("double1"); // S1 U2 S2 U1 q
+
+
+        // Returns the double
+
+        // H = U2-U1  // Remove U2
+        C.sub(4, 8, 10);    // H S1 U2 S2 U1 q
+        rm(4);              // S1 H S2 U1 q
+
+        // // r = 2 * (S2-S1)  // Remove S2
+        C.sub(4, 4, 8);     // S1-S2 S1 H S2 U1 q
+        rm(6);              // S1 H S1-S2 U1 q
+        C.add(4, 4, 8);     // 2*(S1-S2) S1 H S1-S2 U1 q
+        rm(6);              // S1 H r U1 q
+
+        // I = (2 * H)^2
+        C.add(2, 2, 8);     // 2*H S1 H r U1 q
+        C.square(0, 10);    // (2*H)^2 2*H S1 H r U1 q
+        rm(2);              // I S1 H r U1 q
+
+        // V = U1 * I
+        mul(8, 0, 10);      // V I S1 H r U1 q
+        rm(10);             // I S1 H r V q
+
+        // J = H * I // Remove I
+        mul(4, 0, 10);      // J I S1 H r V q
+        rm(2);              // J S1 H r V q
+
+        // X3 = r^2 - J - 2 * V
+
+        // S1J2 = (S1*J)*2  // Remove S1
+        mul(2, 0, 10);      // S1*J J S1 H r V q
+        rm(4);              // J S1*J H r V q
+        add(2,2, 10);       // (S1*J)*2 J S1*J H r V q
+        rm(4);              // J S1J2 H r V q
+
+        // X3 = r^2 - J - 2 * V
+        square(6, 10);      // r^2 J S1J2 H r V q
+        sub(0, 2, 12);      // r^2-J r^2 J S1J2 H r V q
+        rm(2);              // r^2-J J S1J2 H r V q
+        rm(2);              // r^2-J S1J2 H r V q
+        add(8, 8, 10);      // 2*V r^2-J S1J2 H r V q
+        sub(2, 0, 12);      // r^2-J-2*V 2*V r^2-J S1J2 H r V q
+        rm(4);              // 2*V  X3 S1J2 H r V q
+        rm(0);              // X3 S1J2 H r V q
+
+        // Y3 = r * (V-X3)-S1J2
+
+        sub(8, 0, 10);      // V-X3 X3 S1J2 H r V q
+        rm(10);             // X3 S1J2 H r V-X3 q
+        mul(6, 8, 10);      // r*(V-X3) X3 S1J2 H r V-X3 q
+        rm(8);              // X3 S1J2 H r*(V-X3) V-X3 q
+        rm(8);              // S1J2 H r*(V-X3) X3 q
+        sub(4, 0, 8);       // Y3 S1J2 H r*(V-X3) X3 q
+        rm(6);              // S1J2 H Y3 X3 q
+        rm(0);              // H Y3 X3 q
+
+        // Z3 = lastZ * H
+        loadZ3();           // lastZ3 H Y3 X3 q
+        mul(0, 2, 8);       // Z3 lastZ3 H Y3 X3 q
+        rm(4);              // lastZ3 Z3 Y3 X3 q
+        rm(0);              // Z3 Y3 X3 q
+
+        C.swap(1);
+        C.swap(5);
+        C.swap(1);
+        C.swap(4);          // X3 Y3 Z3 q
+
+        // returns the point in memory
+        C.label("returnP"); // X Y Z q
+        rm(0);
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(1);
+        loadX();
+        loadY();
+        C.jump("endpadd");
+
+        C.label("double1"); // S1 U2 S2 U1 q
+        rm(0);
+        rm(0);
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(1);
+        loadX();
+        loadY();
+        C.jump("double");
+
+        C.label("endpadd");
+        C.returnCall();
+
+        function loadX() {
+            C.push(savedP);
+            C.mload();                  // p
+            C.push(32);
+            C.mul();                    // P*32
+            C.push(VAR_POINTS+32);
+            C.add();                    // P*32+32
+            C.dup();                    // P*32+32 P*32+32
+            C.mload();                  // im P*32+32
+            C.swap(1);                  // P*32+32 im
+            C.push(0x20);               // 32 P*32+32 im
+            C.sub();                    // P*32 im
+            C.mload();                  // re im
+        }
+
+        function loadY() {
+            C.push(savedP);
+            C.mload();                  // p
+            C.push(32);
+            C.mul();                    // P*32
+            C.push(VAR_POINTS+32*3);
+            C.add();                    // P*32+32
+            C.dup();                    // P*32+32 P*32+32
+            C.mload();                  // im P*32+32
+            C.swap(1);                  // P*32+32 im
+            C.push(0x20);               // 32 P*32+32 im
+            C.sub();                    // P*32 im
+            C.mload();                  // re im
+        }
+
+        function loadZ3() {
+            C.push(savedZ3+32);
+            C.mload();                  // p
+            C.push(savedZ3);
+            C.mload();
+        }
+
+        function saveZ3() {
+            C.push(savedZ3);
+            C.mstore();
+            C.push(savedZ3+32);
+            C.mstore();
+        }
+    }
+
+    function affine() { // X Y Z q
+        // If Z2=0 return 0
+        C.label("affine");
+        C.dup(4);
+        C.dup(5 + 1);
+        C.or();
+        C.jumpi("notZero");     // X Y Z q
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(0);
+
+        C.jmp("endAffine");
+        C.label("notZero");
+
+        inverse2(4,6);          // Z_inv X Y Z q
+        square(2, 8);           // Z2_inv Z_inv X Y Z q
+        mul(0, 2, 10);          // Z3_inv Z2_inv Z_inv X Y Z q
+        rm(4);                  // Z2_inv Z3_inv X Y Z q
+        C.push(1);
+        C.push(0);              // 1 Z2_inv Z3_inv X Y Z q
+        rm(10);                 // Z2_inv Z3_inv X Y 1 q
+        mul(2, 6, 10);          // YI Z2_inv Z3_inv X Y 1 q
+        rm(8);                  // Z2_inv Z3_inv X YI 1 q
+        mul(0, 4, 10);          // XI Z2_inv Z3_inv X YI 1 q
+        rm(6);                  // Z2_inv Z3_inv XI YI 1 q
+        rm(0);                  // Z3_inv XI YI 1 q
+        rm(0);                  // XI YI 1 q
+        C.label("endAffine");
+        C.returnCall();
+    }
+
+    function inverse2(a, q) {
+        C.dup(q);           // q
+        C.dup(q + 1);       // q q
+        C.push(2);          // 2 q q
+        C.sub();            // q-2 q
+        C.dup(q + 2);       // q q-2 q
+        C.dup(q + 3);       // q q q-2 q
+        C.dup(a + 4);       // ar q q q-2 q
+        C.dup(a + 5);       // ar ar q q q-2 q
+        C.mulmod();         // t0 q q-2 q
+
+        C.dup(q   + 4);     // q t0 q q-2 q
+        C.dup(a+1 + 5);     // ai q t0 q q-2 q
+        C.dup(a+1 + 6);     // ai ai q t0 q q-2 q
+        C.mulmod();         // t1 t0 q q-2 q
+
+        C.addmod();         // t2 q-2 q
+        C.expmod();         // t3
+
+        C.dup(q + 1);       // q t3
+        C.dup(q + 2);       // q q t3
+        C.dup(q + 3);       // q q q t3
+        C.dup(1);           // t3 q q q t3
+        C.sub();            // -t3 q q t3
+        C.dup(a+1 + 3);     // ai -t3 q q t3
+        C.mulmod();         // ii q t3
+        C.swap(2);          // t3 q ii
+        C.dup(a + 3);       // ar t3 q ii
+        C.mulmod();         // ir ii
+    }
+
+    function storeVals() {
+        C.push(VAR_POINTS);                 // p
+        for (let i=0; i<NPOINTS; i++) {
+            const MP = G2.affine(G2.mulScalar(P, i));
+            for (let j=0; j<2; j++) {
+                for (let k=0; k<2; k++) {
+                    C.push(toHex256(MP[j][k]));     // MP[0][0] p
+                    C.dup(1);                       // p MP[0][0] p
+                    C.mstore();                     // p
+                    C.push(32);                     // 32 p
+                    C.add();                        // p+32
+                }
+            }
+        }
+    }
+
+}
+
+module.exports.abi = [
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "escalar",
+                "type": "uint256"
+            }
+        ],
+        "name": "mulexp",
+        "outputs": [
+            {
+                "name": "",
+                "type": "uint256"
+            },
+            {
+                "name": "",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "pure",
+        "type": "function"
+    }
+];
+
+module.exports.createCode = createCode;
diff --git a/test/modules/src/mimc7.js b/test/modules/src/mimc7.js
new file mode 100644
index 0000000..defafab
--- /dev/null
+++ b/test/modules/src/mimc7.js
@@ -0,0 +1,66 @@
+const Scalar = require("ffjavascript").Scalar;
+const ZqField = require("ffjavascript").ZqField;
+
+const Web3Utils = require("web3-utils");
+const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
+exports.F = F;
+
+const SEED = "mimc";
+const NROUNDS = 91;
+
+exports.getIV = (seed) => {
+    if (typeof seed === "undefined") seed = SEED;
+    const c = Web3Utils.keccak256(seed+"_iv");
+    const cn = Scalar.FromString(Web3Utils.toBN(c).toString());
+    const iv = cn.mod(F.p);
+    return iv;
+};
+
+exports.getConstants = (seed, nRounds) => {
+    if (typeof seed === "undefined") seed = SEED;
+    if (typeof nRounds === "undefined") nRounds = NROUNDS;
+    const cts = new Array(nRounds);
+    let c = Web3Utils.keccak256(SEED);
+    for (let i=1; i<nRounds; i++) {
+        c = Web3Utils.keccak256(c);
+
+        const n1 = Web3Utils.toBN(c).mod(Web3Utils.toBN(F.p.toString()));
+        const c2 = Web3Utils.padLeft(Web3Utils.toHex(n1), 64);
+        cts[i] = Scalar.fromString(Web3Utils.toBN(c2).toString());
+    }
+    cts[0] = F.e(0);
+    return cts;
+};
+
+const cts = exports.getConstants(SEED, 91);
+
+exports.hash =  (_x_in, _k) =>{
+    const x_in = F.e(_x_in);
+    const k = F.e(_k);
+    let r;
+    for (let i=0; i<NROUNDS; i++) {
+        const c = cts[i];
+        const t = (i==0) ? F.add(x_in, k) : F.add(F.add(r, k), c);
+        r = F.pow(t, 7);
+    }
+    return F.add(r, k);
+};
+
+exports.multiHash = (arr, key) => {
+    let r;
+    if (typeof(key) === "undefined") {
+        r = F.zero;
+    } else {
+        r = key;
+    }
+    for (let i=0; i<arr.length; i++) {
+        r = F.add(
+            F.add(
+                r,
+                arr[i]
+            ),
+            exports.hash(F.e(arr[i]), r)
+        );
+    }
+    return r;
+};
diff --git a/test/modules/src/mimc_gencontract.js b/test/modules/src/mimc_gencontract.js
new file mode 100644
index 0000000..f479374
--- /dev/null
+++ b/test/modules/src/mimc_gencontract.js
@@ -0,0 +1,114 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+const Web3Utils = require("web3-utils");
+
+const Contract = require("./evmasm");
+
+function createCode(seed, n) {
+
+    let ci = Web3Utils.keccak256(seed);
+
+    const C = new Contract();
+
+    C.push(0x44);
+    C.push("0x00");
+    C.push("0x00");
+    C.calldatacopy();
+    C.push("0x0100000000000000000000000000000000000000000000000000000000");
+    C.push("0x00");
+    C.mload();
+    C.div();
+    C.push("0xd15ca109"); // MiMCpe7(uint256,uint256)
+//    C.push("0x8c42199e"); // MiMCpe7(uint256,uint256,uint256)
+    C.eq();
+    C.jmpi("start");
+    C.invalid();
+
+    C.label("start");
+    C.push("0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001");  // q
+    C.push("0x24");
+    C.mload();          // k q
+
+
+    C.dup(1);           // q k q
+    C.dup(0);           // q q k q
+    C.push("0x04");
+    C.mload();          // x q q k q
+    C.dup(3);           // k x q q k q
+    C.addmod();         // t=x+k q k q
+    C.dup(1);           // q t q k q
+    C.dup(0);           // q q t q k q
+    C.dup(2);           // t q q t q k q
+    C.dup(0);           // t t q q t q k q
+    C.mulmod();         // a=t^2 q t q k q
+    C.dup(1);           // q a q t q k q
+    C.dup(1);           // a q a q t q k q
+    C.dup(0);           // a a q a q t q k q
+    C.mulmod();         // b=t^4 a q t q k q
+    C.mulmod();         // c=t^6 t q k q
+    C.mulmod();         // r=t^7 k q
+
+    for (let i=0; i<n-1; i++) {
+        ci = Web3Utils.keccak256(ci);
+        C.dup(2);       // q r k q
+        C.dup(0);       // q q r k q
+        C.dup(0);       // q q q r k q
+        C.swap(3);      // r q q q k q
+        C.push(ci);     // c r q q k q
+        C.addmod();     // s=c+r q q k q
+        C.dup(3);       // k s q q k q
+        C.addmod();     // t=s+k q k q
+        C.dup(1);       // q t q k q
+        C.dup(0);       // q q t q k q
+        C.dup(2);       // t q q t q k q
+        C.dup(0);       // t t q q t q k q
+        C.mulmod();     // a=t^2 q t q k q
+        C.dup(1);       // q a q t q k q
+        C.dup(1);       // a q a q t q k q
+        C.dup(0);       // a a q a q t q k q
+        C.mulmod();     // b=t^4 a q t q k q
+        C.mulmod();     // c=t^6 t q k q
+        C.mulmod();     // r=t^7 k q
+    }
+
+    C.addmod();     // res=t^7+k
+    C.push("0x00");
+    C.mstore();     // Save it to pos 0;
+    C.push("0x20");
+    C.push("0x00");
+    C.return();
+
+    return C.createTxData();
+}
+
+module.exports.abi = [
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "in_x",
+                "type": "uint256"
+            },
+            {
+                "name": "in_k",
+                "type": "uint256"
+            }
+        ],
+        "name": "MiMCpe7",
+        "outputs": [
+            {
+                "name": "out_x",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "pure",
+        "type": "function"
+    }
+];
+
+module.exports.createCode = createCode;
+
+
diff --git a/test/modules/src/mimc_print_iv.js b/test/modules/src/mimc_print_iv.js
new file mode 100644
index 0000000..208fabd
--- /dev/null
+++ b/test/modules/src/mimc_print_iv.js
@@ -0,0 +1,3 @@
+const mimc7 = require("./mimc7.js");
+
+console.log("IV: "+mimc7.getIV().toString());
diff --git a/test/modules/src/mimc_printconstants.js b/test/modules/src/mimc_printconstants.js
new file mode 100644
index 0000000..f92f7ff
--- /dev/null
+++ b/test/modules/src/mimc_printconstants.js
@@ -0,0 +1,13 @@
+const mimc7 = require("./mimc7.js");
+
+const nRounds = 91;
+let S = "[\n";
+const cts = mimc7.getConstants();
+for (let i=0; i<nRounds; i++) {
+    S = S + cts[i].toString();
+    if (i<nRounds-1) S = S + ",";
+    S=S+"\n";
+}
+S = S + "]\n";
+
+console.log(S);
diff --git a/test/modules/src/mimc_printcontract.js b/test/modules/src/mimc_printcontract.js
new file mode 100644
index 0000000..6f6351e
--- /dev/null
+++ b/test/modules/src/mimc_printcontract.js
@@ -0,0 +1,13 @@
+const mimcGenContract = require("./mimc_gencontract");
+
+const SEED = "mimc";
+
+let nRounds;
+if (typeof process.argv[2] != "undefined") {
+    nRounds = parseInt(process.argv[2]);
+} else {
+    nRounds = 91;
+}
+
+console.log(mimcGenContract.createCode(SEED, nRounds));
+
diff --git a/test/modules/src/mimcsponge.js b/test/modules/src/mimcsponge.js
new file mode 100644
index 0000000..bed4f54
--- /dev/null
+++ b/test/modules/src/mimcsponge.js
@@ -0,0 +1,86 @@
+const Scalar = require("ffjavascript").Scalar
+const Web3Utils = require("web3-utils");
+const ZqField = require("ffjavascript").ZqField;
+const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
+
+const SEED = "mimcsponge";
+const NROUNDS = 220;
+
+exports.getIV = (seed) => {
+    if (typeof seed === "undefined") seed = SEED;
+    const c = Web3Utils.keccak256(seed+"_iv");
+    const cn = Scalar.fromString(Web3Utils.toBN(c).toString());
+    const iv = cn.mod(F.p);
+    return iv;
+};
+
+exports.getConstants = (seed, nRounds) => {
+    if (typeof seed === "undefined") seed = SEED;
+    if (typeof nRounds === "undefined") nRounds = NROUNDS;
+    const cts = new Array(nRounds);
+    let c = Web3Utils.keccak256(SEED);
+    for (let i=1; i<nRounds; i++) {
+        c = Web3Utils.keccak256(c);
+
+        const n1 = Web3Utils.toBN(c).mod(Web3Utils.toBN(F.p.toString()));
+        const c2 = Web3Utils.padLeft(Web3Utils.toHex(n1), 64);
+        cts[i] = F.e(Web3Utils.toBN(c2).toString());
+    }
+    cts[0] = F.e(0);
+    cts[cts.length - 1] = F.e(0);
+    return cts;
+};
+
+const cts = exports.getConstants(SEED, NROUNDS);
+
+exports.hash = (_xL_in, _xR_in, _k) =>{
+    let xL = F.e(_xL_in);
+    let xR = F.e(_xR_in);
+    const k = F.e(_k);
+    for (let i=0; i<NROUNDS; i++) {
+        const c = cts[i];
+        const t = (i==0) ? F.add(xL, k) : F.add(F.add(xL, k), c);
+        const xR_tmp = F.e(xR);
+        if (i < (NROUNDS - 1)) {
+            xR = xL;
+            xL = F.add(xR_tmp, F.pow(t, 5));
+        } else {
+            xR = F.add(xR_tmp, F.pow(t, 5));
+        }
+    }
+    return {
+        xL: F.normalize(xL),
+        xR: F.normalize(xR),
+    };
+};
+
+exports.multiHash = (arr, key, numOutputs) => {
+    if (typeof(numOutputs) === "undefined") {
+        numOutputs = 1;
+    }
+    if (typeof(key) === "undefined") {
+        key = F.zero;
+    }
+
+    let R = F.zero;
+    let C = F.zero;
+
+    for (let i=0; i<arr.length; i++) {
+        R = F.add(R, F.e(arr[i]));
+        const S = exports.hash(R, C, key);
+        R = S.xL;
+        C = S.xR;
+    }
+    let outputs = [R];
+    for (let i=1; i < numOutputs; i++) {
+        const S = exports.hash(R, C, key);
+        R = S.xL;
+        C = S.xR;
+        outputs.push(R);
+    }
+    if (numOutputs == 1) {
+        return F.normalize(outputs[0]);
+    } else {
+        return outputs.map(x => F.normalize(x));
+    }
+};
diff --git a/test/modules/src/mimcsponge_gencontract.js b/test/modules/src/mimcsponge_gencontract.js
new file mode 100644
index 0000000..eb7d27b
--- /dev/null
+++ b/test/modules/src/mimcsponge_gencontract.js
@@ -0,0 +1,128 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+const Web3Utils = require("web3-utils");
+
+const Contract = require("./evmasm");
+
+function createCode(seed, n) {
+
+    let ci = Web3Utils.keccak256(seed);
+
+    const C = new Contract();
+
+    C.push(0x64);
+    C.push("0x00");
+    C.push("0x00");
+    C.calldatacopy();
+    C.push("0x0100000000000000000000000000000000000000000000000000000000");
+    C.push("0x00");
+    C.mload();
+    C.div();
+    C.push("0x3f1a1187"); // MiMCSponge(uint256,uint256,uint256)
+    C.eq();
+    C.jmpi("start");
+    C.invalid();
+
+    C.label("start");
+    C.push("0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001");  // q
+    C.push("0x44");
+    C.mload();          // k q
+    C.push("0x04");
+    C.mload();          // xL k q
+    C.dup(2);           // q xL k q
+    C.push("0x24");
+    C.mload();          // xR q xL k q
+    C.dup(1);           // q xR q xL k q
+    C.dup(0);           // q q xR q xL k q
+    C.dup(4);           // xL q q xR q xL k q
+    C.dup(6);           // k xL q q xR q xL k q
+    C.addmod();         // t=k+xL q xR q xL k q
+    C.dup(1);           // q t q xR q xL k q
+    C.dup(0);           // q q t q xR q xL k q
+    C.dup(2);           // t q q t q xR q xL k q
+    C.dup(0);           // t t q q t q xR q xL k q
+    C.mulmod();         // b=t^2 q t q xR q xL k q
+    C.dup(0);           // b b q t q xR q xL k q
+    C.mulmod();         // c=t^4 t q xR q xL k q
+    C.mulmod();         // d=t^5 xR q xL k q
+    C.addmod();         // e=t^5+xR xL k q (for next round: xL xR k q)
+
+    for (let i=0; i<n-1; i++) {
+        if (i < n-2) {
+          ci = Web3Utils.keccak256(ci);
+        } else {
+          ci = "0x00";
+        }
+        C.swap(1);      // xR xL k q
+        C.dup(3);       // q xR xL k q
+        C.dup(3);       // k q xR xL k q
+        C.dup(1);       // q k q xR xL k q
+        C.dup(4);       // xL q k q xR xL k q
+        C.push(ci);     // ci xL q k q xR xL k q
+        C.addmod();     // a=ci+xL k q xR xL k q
+        C.addmod();     // t=a+k xR xL k q
+        C.dup(4);       // q t xR xL k q
+        C.swap(1);      // t q xR xL k q
+        C.dup(1);       // q t q xR xL k q
+        C.dup(0);       // q q t q xR xL k q
+        C.dup(2);       // t q q t q xR xL k q
+        C.dup(0);       // t t q q t q xR xL k q
+        C.mulmod();     // b=t^2 q t q xR xL k q
+        C.dup(0);       // b b q t q xR xL k q
+        C.mulmod();     // c=t^4 t q xR xL k q
+        C.mulmod();     // d=t^5 xR xL k q
+        C.dup(4);       // q d xR xL k q
+        C.swap(2);      // xR d q xL k q
+        C.addmod();     // e=t^5+xR xL k q (for next round: xL xR k q)
+    }
+
+    C.push("0x20");
+    C.mstore();     // Save it to pos 0;
+    C.push("0x00");
+    C.mstore();     // Save it to pos 1;
+    C.push("0x40");
+    C.push("0x00");
+    C.return();
+
+    return C.createTxData();
+}
+
+module.exports.abi = [
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "xL_in",
+                "type": "uint256"
+            },
+            {
+                "name": "xR_in",
+                "type": "uint256"
+            },
+            {
+                "name": "k",
+                "type": "uint256"
+            }
+        ],
+        "name": "MiMCSponge",
+        "outputs": [
+            {
+                "name": "xL",
+                "type": "uint256"
+            },
+            {
+                "name": "xR",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "pure",
+        "type": "function"
+    }
+];
+
+module.exports.createCode = createCode;
+
+
diff --git a/test/modules/src/mimcsponge_printconstants.js b/test/modules/src/mimcsponge_printconstants.js
new file mode 100644
index 0000000..4f8292e
--- /dev/null
+++ b/test/modules/src/mimcsponge_printconstants.js
@@ -0,0 +1,13 @@
+const mimcsponge = require("./mimcsponge.js");
+
+const nRounds = 220;
+let S = "[\n";
+const cts = mimcsponge.getConstants();
+for (let i=0; i<nRounds; i++) {
+    S = S + cts[i].toString();
+    if (i<nRounds-1) S = S + ",";
+    S=S+"\n";
+}
+S = S + "]\n";
+
+console.log(S);
diff --git a/test/modules/src/mimcsponge_printcontract.js b/test/modules/src/mimcsponge_printcontract.js
new file mode 100644
index 0000000..d9ec862
--- /dev/null
+++ b/test/modules/src/mimcsponge_printcontract.js
@@ -0,0 +1,13 @@
+const mimcGenContract = require("./mimcsponge_gencontract");
+
+const SEED = "mimcsponge";
+
+let nRounds;
+if (typeof process.argv[2] != "undefined") {
+    nRounds = parseInt(process.argv[2]);
+} else {
+    nRounds = 220;
+}
+
+console.log(mimcGenContract.createCode(SEED, nRounds));
+
diff --git a/test/modules/src/pedersenHash.js b/test/modules/src/pedersenHash.js
new file mode 100644
index 0000000..5c0a376
--- /dev/null
+++ b/test/modules/src/pedersenHash.js
@@ -0,0 +1,121 @@
+const babyJub = require("./babyjub");
+const createBlakeHash = require("blake-hash");
+const blake2b = require("blake2b");
+const Scalar = require("ffjavascript").Scalar;
+
+const GENPOINT_PREFIX = "PedersenGenerator";
+const windowSize = 4;
+const nWindowsPerSegment = 50;
+
+exports.hash = pedersenHash;
+exports.getBasePoint = getBasePoint;
+
+function baseHash(type, S) {
+    if (type == "blake") {
+        return createBlakeHash("blake256").update(S).digest();
+    } else if (type == "blake2b") {
+        return Buffer.from(blake2b(32).update(Buffer.from(S)).digest());
+    }
+}
+
+function pedersenHash(msg, options) {
+    options = options || {};
+    options.baseHash = options.baseHash || "blake";
+    const bitsPerSegment = windowSize*nWindowsPerSegment;
+    const bits = buffer2bits(msg);
+
+    const nSegments = Math.floor((bits.length - 1)/(windowSize*nWindowsPerSegment)) +1;
+
+    let accP = [babyJub.F.zero,babyJub.F.one];
+
+    for (let s=0; s<nSegments; s++) {
+        let nWindows;
+        if (s == nSegments-1) {
+            nWindows = Math.floor(((bits.length - (nSegments - 1)*bitsPerSegment) - 1) / windowSize) +1;
+        } else {
+            nWindows = nWindowsPerSegment;
+        }
+        let escalar = Scalar.e(0);
+        let exp = Scalar.e(1);
+        for (let w=0; w<nWindows; w++) {
+            let o = s*bitsPerSegment + w*windowSize;
+            let acc = Scalar.e(1);
+            for (let b=0; ((b<windowSize-1)&&(o<bits.length)) ; b++) {
+                if (bits[o]) {
+                    acc = Scalar.add(acc, Scalar.shl(Scalar.e(1), b) );
+                }
+                o++;
+            }
+            if (o<bits.length) {
+                if (bits[o]) {
+                    acc = Scalar.neg(acc);
+                }
+                o++;
+            }
+            escalar = Scalar.add(escalar, Scalar.mul(acc, exp));
+            exp = Scalar.shl(exp, windowSize+1);
+        }
+
+        if (Scalar.lt(escalar, 0)) {
+            escalar = Scalar.add( escalar, babyJub.subOrder);
+        }
+
+        accP = babyJub.addPoint(accP, babyJub.mulPointEscalar(getBasePoint(options.baseHash, s), escalar));
+    }
+
+    return babyJub.packPoint(accP);
+}
+
+let bases = [];
+
+function getBasePoint(baseHashType, pointIdx) {
+    if (pointIdx<bases.length) return bases[pointIdx];
+    let p= null;
+    let tryIdx = 0;
+    while (p==null) {
+        const S = GENPOINT_PREFIX + "_" + padLeftZeros(pointIdx, 32) + "_" + padLeftZeros(tryIdx, 32);
+        const h = baseHash(baseHashType, S);
+        h[31] = h[31] & 0xBF;  // Set 255th bit to 0 (256th is the signal and 254th is the last possible bit to 1)
+        p = babyJub.unpackPoint(h);
+        tryIdx++;
+    }
+
+    const p8 = babyJub.mulPointEscalar(p, 8);
+
+    if (!babyJub.inSubgroup(p8)) {
+        throw new Error("Point not in curve");
+    }
+
+    bases[pointIdx] = p8;
+    return p8;
+}
+
+function padLeftZeros(idx, n) {
+    let sidx = "" + idx;
+    while (sidx.length<n) sidx = "0"+sidx;
+    return sidx;
+}
+
+/*
+Input a buffer
+Returns an array of booleans. 0 is LSB of first byte and so on.
+ */
+function buffer2bits(buff) {
+    const res = new Array(buff.length*8);
+    for (let i=0; i<buff.length; i++) {
+        const b = buff[i];
+        res[i*8] = b & 0x01;
+        res[i*8+1] = b & 0x02;
+        res[i*8+2] = b & 0x04;
+        res[i*8+3] = b & 0x08;
+        res[i*8+4] = b & 0x10;
+        res[i*8+5] = b & 0x20;
+        res[i*8+6] = b & 0x40;
+        res[i*8+7] = b & 0x80;
+    }
+    return res;
+}
+
+
+
+
diff --git a/test/modules/src/pedersen_printbases.js b/test/modules/src/pedersen_printbases.js
new file mode 100644
index 0000000..457a76b
--- /dev/null
+++ b/test/modules/src/pedersen_printbases.js
@@ -0,0 +1,21 @@
+const pedersenHash = require("./pedersenHash.js");
+
+let nBases;
+if (typeof process.argv[2] != "undefined") {
+    nBases = parseInt(process.argv[2]);
+} else {
+    nBases = 5;
+}
+
+let baseHash;
+if (typeof process.argv[3] != "undefined") {
+    baseHash = process.argv[3];
+} else {
+    baseHash = "blake";
+}
+
+
+for (let i=0; i < nBases; i++) {
+    const p = pedersenHash.getBasePoint(baseHash, i);
+    console.log(`[${p[0]},${p[1]}]`);
+}
diff --git a/test/modules/src/poseidon.js b/test/modules/src/poseidon.js
new file mode 100644
index 0000000..af63c40
--- /dev/null
+++ b/test/modules/src/poseidon.js
@@ -0,0 +1,46 @@
+const assert = require("assert");
+const Scalar = require("ffjavascript").Scalar;
+const ZqField = require("ffjavascript").ZqField;
+const { unstringifyBigInts } = require("ffjavascript").utils;
+
+// Prime 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001
+const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
+
+// Parameters are generated by a reference script https://extgit.iaik.tugraz.at/krypto/hadeshash/-/blob/master/code/generate_parameters_grain.sage
+// Used like so: sage generate_parameters_grain.sage 1 0 254 2 8 56 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001
+const { C, M } = unstringifyBigInts(require("./poseidon_constants.json"));
+
+// Using recommended parameters from whitepaper https://eprint.iacr.org/2019/458.pdf (table 2, table 8)
+// Generated by https://extgit.iaik.tugraz.at/krypto/hadeshash/-/blob/master/code/calc_round_numbers.py
+// And rounded up to nearest integer that divides by t
+const N_ROUNDS_F = 8;
+const N_ROUNDS_P = [56, 57, 56, 60, 60, 63, 64, 63];
+
+const pow5 = a => F.mul(a, F.square(F.square(a, a)));
+
+function poseidon(inputs) {
+    assert(inputs.length > 0);
+    assert(inputs.length < N_ROUNDS_P.length - 1);
+
+    const t = inputs.length + 1;
+    const nRoundsF = N_ROUNDS_F;
+    const nRoundsP = N_ROUNDS_P[t - 2];
+
+    let state = [F.zero, ...inputs.map(a => F.e(a))];
+    for (let r = 0; r < nRoundsF + nRoundsP; r++) {
+        state = state.map((a, i) => F.add(a, C[t - 2][r * t + i]));
+
+        if (r < nRoundsF / 2 || r >= nRoundsF / 2 + nRoundsP) {
+            state = state.map(a => pow5(a));
+        } else {
+            state[0] = pow5(state[0]);
+        }
+
+        state = state.map((_, i) =>
+            state.reduce((acc, a, j) => F.add(acc, F.mul(M[t - 2][i][j], a)), F.zero)
+        );
+    }
+    return F.normalize(state[0]);
+}
+
+module.exports = poseidon;
diff --git a/test/modules/src/poseidon_constants.json b/test/modules/src/poseidon_constants.json
new file mode 100644
index 0000000..b5b6196
--- /dev/null
+++ b/test/modules/src/poseidon_constants.json
@@ -0,0 +1,3449 @@
+{
+  "C": [
+    [
+      "4417881134626180770308697923359573201005643519861877412381846989312604493735",
+      "5433650512959517612316327474713065966758808864213826738576266661723522780033",
+      "13641176377184356099764086973022553863760045607496549923679278773208775739952",
+      "17949713444224994136330421782109149544629237834775211751417461773584374506783",
+      "13765628375339178273710281891027109699578766420463125835325926111705201856003",
+      "19179513468172002314585757290678967643352171735526887944518845346318719730387",
+      "5157412437176756884543472904098424903141745259452875378101256928559722612176",
+      "535160875740282236955320458485730000677124519901643397458212725410971557409",
+      "1050793453380762984940163090920066886770841063557081906093018330633089036729",
+      "10665495010329663932664894101216428400933984666065399374198502106997623173873",
+      "19965634623406616956648724894636666805991993496469370618546874926025059150737",
+      "13007250030070838431593222885902415182312449212965120303174723305710127422213",
+      "16877538715074991604507979123743768693428157847423939051086744213162455276374",
+      "18211747749504876135588847560312685184956239426147543810126553367063157141465",
+      "18151553319826126919739798892854572062191241985315767086020821632812331245635",
+      "19957033149976712666746140949846950406660099037474791840946955175819555930825",
+      "3469514863538261843186854830917934449567467100548474599735384052339577040841",
+      "989698510043911779243192466312362856042600749099921773896924315611668507708",
+      "12568377015646290945235387813564567111330046038050864455358059568128000172201",
+      "20856104135605479600325529349246932565148587186338606236677138505306779314172",
+      "8206918720503535523121349917159924938835810381723474192155637697065780938424",
+      "1309058477013932989380617265069188723120054926187607548493110334522527703566",
+      "14076116939332667074621703729512195584105250395163383769419390236426287710606",
+      "10153498892749751942204288991871286290442690932856658983589258153608012428674",
+      "18202499207234128286137597834010475797175973146805180988367589376893530181575",
+      "12739388830157083522877690211447248168864006284243907142044329113461613743052",
+      "15123358710467780770838026754240340042441262572309759635224051333176022613949",
+      "19925004701844594370904593774447343836015483888496504201331110250494635362184",
+      "10352416606816998476681131583320899030072315953910679608943150613208329645891",
+      "10567371822366244361703342347428230537114808440249611395507235283708966113221",
+      "5635498582763880627392290206431559361272660937399944184533035305989295959602",
+      "11866432933224219174041051738704352719163271639958083608224676028593315904909",
+      "5795020705294401441272215064554385591292330721703923167136157291459784140431",
+      "9482202378699252817564375087302794636287866584767523335624368774856230692758",
+      "4245237636894546151746468406560945873445548423466753843402086544922216329298",
+      "12000500941313982757584712677991730019124834399479314697467598397927435905133",
+      "7596790274058425558167520209857956363736666939016807569082239187494363541787",
+      "2484867918246116343205467273440098378820186751202461278013576281097918148877",
+      "18312645949449997391810445935615409295369169383463185688973803378104013950190",
+      "15320686572748723004980855263301182130424010735782762814513954166519592552733",
+      "12618438900597948888520621062416758747872180395546164387827245287017031303859",
+      "17438141672027706116733201008397064011774368832458707512367404736905021019585",
+      "6374197807230665998865688675365359100400438034755781666913068586172586548950",
+      "2189398913433273865510950346186699930188746169476472274335177556702504595264",
+      "6268495580028970231803791523870131137294646402347399003576649137450213034606",
+      "17896250365994900261202920044129628104272791547990619503076839618914047059275",
+      "13692156312448722528008862371944543449350293305158722920787736248435893008873",
+      "15234446864368744483209945022439268713300180233589581910497691316744177619376",
+      "1572426502623310766593681563281600503979671244997798691029595521622402217227",
+      "80103447810215150918585162168214870083573048458555897999822831203653996617",
+      "8228820324013669567851850635126713973797711779951230446503353812192849106342",
+      "5375851433746509614045812476958526065449377558695752132494533666370449415873",
+      "12115998939203497346386774317892338270561208357481805380546938146796257365018",
+      "9764067909645821279940531410531154041386008396840887338272986634350423466622",
+      "8538708244538850542384936174629541085495830544298260335345008245230827876882",
+      "7140127896620013355910287215441004676619168261422440177712039790284719613114",
+      "14297402962228458726038826185823085337698917275385741292940049024977027409762",
+      "6667115556431351074165934212337261254608231545257434281887966406956835140819",
+      "20226761165244293291042617464655196752671169026542832236139342122602741090001",
+      "12038289506489256655759141386763477208196694421666339040483042079632134429119",
+      "19027757334170818571203982241812412991528769934917288000224335655934473717551",
+      "16272152964456553579565580463468069884359929612321610357528838696790370074720",
+      "2500392889689246014710135696485946334448570271481948765283016105301740284071",
+      "8595254970528530312401637448610398388203855633951264114100575485022581946023",
+      "11635945688914011450976408058407206367914559009113158286982919675551688078198",
+      "614739068603482619581328040478536306925147663946742687395148680260956671871",
+      "18692271780377861570175282183255720350972693125537599213951106550953176268753",
+      "4987059230784976306647166378298632695585915319042844495357753339378260807164",
+      "21851403978498723616722415377430107676258664746210815234490134600998983955497",
+      "9830635451186415300891533983087800047564037813328875992115573428596207326204",
+      "4842706106434537116860242620706030229206345167233200482994958847436425185478",
+      "6422235064906823218421386871122109085799298052314922856340127798647926126490",
+      "4564364104986856861943331689105797031330091877115997069096365671501473357846",
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+        "14046812111383844816383347755263287603387502282980410255379630204396960343368",
+        "11590093969266595252327261214735156204516524792938909229175092594303424141199",
+        "4623517074925959322927421514289132524032863498392441375476410779446526502799",
+        "11550389531965919926150256242174358326491059727918559332939872696684299343135"
+      ],
+      [
+        "408487396317981846281976563618407581852133413686169882346565860317912856432",
+        "10717757571561029382519744040791773994731123262749372629687813122941078154016",
+        "21323787615496251932181222397986048515693661833099659753170924658480548866921",
+        "20780799310067873093555276926357624414275975377319941015818682052081980020892",
+        "9948385944800296129032348634683354181546876394979291412116493575442898426065",
+        "4957033413111065858035065225611730571499258914257595411830870977545212164095",
+        "5227254936689728148737265263965107718869714128941995977191096572191110991079",
+        "3582814872786080867997255427740166393615552773099677831398251586195329933975"
+      ],
+      [
+        "2136737803483410555580163900871515004623198990079556379647848364282254542316",
+        "2965752098571712086281180512370022839542603960309127077035724860894697782076",
+        "1478525086510042909660572998242949118476342047444968703549274608283885678547",
+        "3563375996604290844805064443647611841824012587505923250907062088840679700555",
+        "15461452581843517997080348781604020486994675070532901120353124746087231692278",
+        "20472517020063295821544268171575414161230806406668271887185150097779785573889",
+        "21058001005918321995459971112208002381460494177332965873048074199074929946172",
+        "15805746645980285645504697043988763170971539673993759868487715403982423015009"
+      ],
+      [
+        "7141240965656437676130015766799708612940092856280620325870466265817008351948",
+        "21418010338098024788434337801477243267248314524079104488811186206038748626642",
+        "20272108634229595317682817969506273496034097230124371921628691470754475805838",
+        "16734095147399743907618148751687506877774623133599770145304816136018239803101",
+        "8439324632051181834455499457268557602816180314723268640869118054114888151316",
+        "4953900961796661020464968131122569974581908893169105485631905994366550928492",
+        "18071625983692455679240094911529791119099077429122520426399552756115503123111",
+        "19638917592063029281156873227053827678889868373299664608974791764751784473040"
+      ]
+    ],
+    [
+      [
+        "708458300293891745856425423607721463509413916954480913172999113933455141974",
+        "14271228280974236486906321420750465147409060481575418066139408902283524749997",
+        "15852878306984329426654933335929774834335684656381336212668681628835945610740",
+        "14650063533814858868677752931082459040894187001723054833238582599403791885108",
+        "5582010871038992135003913294240928881356211983701117708338786934614118892655",
+        "17817167707934144056061336113828482446323869140602919022203233163412357573520",
+        "16618894908063983272770489218670262360190849213687934219652137459014587794085",
+        "10883405878649359800090160909097238327402403049670067541357916315880123123342",
+        "7439184039942350631846254109167666628442833987137988596039526179738154790587"
+      ],
+      [
+        "2727663760525187222746025175304386977552466570311228286110141668880678011929",
+        "16992375884417886634716738306539629570444547136030480542879886913528563834233",
+        "4178586893949624406750122665277033849762243490544460031634329370298105635905",
+        "2517914797385699886738929430037355069462619900197972886482360691236776726214",
+        "20164173810534657634631187494276970100735049909727379228976555863615716408280",
+        "19970958827248077001061220127605534603528515080207197493660642269195127427214",
+        "15606275977308968307194602612931727810866183872589808138812916593200446820753",
+        "12261436001550634140750381230737452634746867040398895669545077774504957433511",
+        "10405309809257831434323731445544896504541938387524726028487604098725193737428"
+      ],
+      [
+        "13408856444092113657034337770571899796129642125690066226794939383190876435468",
+        "19768080898957882918527124226120459667739640387901357739011662191034806046251",
+        "16749889646056241484852997428132695501278739424507088920371060969471495213919",
+        "12331609790192161246735870679870317366088443875784324655482358218146673901073",
+        "15769331739277556832196167201116801527901089923090632364403958141614820528626",
+        "5227172275505968397128736045169568430462701766148126842874241545343535393924",
+        "919073378344729780131814412541912290691661039815032069498359347682919854836",
+        "17858725475505870077023114050620337312678855554361132257763133392017321111169",
+        "21805188450184460363143840112266872832328782034569970452376470141743078343745"
+      ],
+      [
+        "15808413311863154368918155104905222670782553225279887458053980771135357021692",
+        "12828907214414139667587331812274388831051429093098655261887619166452245292431",
+        "19323880880917307340820066456419195877039970908109908221992925424585030574269",
+        "17591732412986269470826282099678922890996647592922237928486497997144096433314",
+        "5282593184575641056912422403901924986019740793240905758215569065763629999318",
+        "16013130707598525718519250412251656096494468043256226360413191733653074896117",
+        "928381583587170989315021718439506896903185927814675820160976165627097308915",
+        "13354336789663524324458402003354905134416094005220899335023797754517805691310",
+        "8780135673134081873589118311874067764073719549433574820315100541871522642766"
+      ],
+      [
+        "3334957744389892864165113989538814646945861179021194859030934481494560681812",
+        "10553413566358881045095498839713459314577909144176577153981801574128014927353",
+        "18894321506279909207228932263261226433242541255661384643559047811974513999438",
+        "20211894014628303327332299342564779073614790317614402383971270594430055013904",
+        "16723480621932556506775906903415088312771104391224076734252099577243237899106",
+        "1131872547334579236404174618548801749854242069301712398106619948805304881636",
+        "17386814048141719093058723520379257085987299288710382497237609774141718421404",
+        "13729980537487612221640320393867198844745491357830417754869369043292518007370",
+        "15860780436383591737179656321807464721751913977397035980422407138400867838633"
+      ],
+      [
+        "14708550460111247278740231297332510059116901767161326454481923990389610737973",
+        "3132820559166321299152015048428879769905404947939291493327190426785911502819",
+        "8658132367999084824971296219169212568783540935524918908332001856872807119287",
+        "21064783047501777742084787259676320053480170916619513986794406566953069418035",
+        "20731000104011695148048713576219525164619502119638555785381543866326561323",
+        "17189725817866212967650950297463469529475851286172280116066228706121595462088",
+        "3310440878606659516028312898499559492876015493892608849966645073367377278233",
+        "18463918215326370595980949760897480127622730018343709491036454088497976892863",
+        "10894192430593140913557164014343360386192963621862346779515699758352916852228"
+      ],
+      [
+        "5060610877870389107953459328006060153180283860738879092399406248484265273634",
+        "9068988823145592214189961315730261367007076042069390630024839612151270430414",
+        "13160707893890865447331361630522644819624543031829773191665491273833460019183",
+        "13920568292534026180186486064598876780779571940988254327823480971820885713801",
+        "3894011501178134026216736522445829906312115650019712122802932677318433032635",
+        "17895318821130376385979570244603067634449453259842805202694945793852667231847",
+        "9777993060458301797155055013115849176281006051494461044565335406558308324220",
+        "16521293541516305251718414192107787058980727971856888501176820100904791554730",
+        "7744063601405355255689420547832904761861257642931934580021876189691881462544"
+      ],
+      [
+        "5444730929053688962452159157646022068806222098484627080046464163159451208522",
+        "1524118152994294864739915388438939180298324297960159419600850033701763764640",
+        "1334622237342346242862023763160346671504959163544406543315614662442562816653",
+        "16126317914306849967682996412350336172782726693375105190424151365140854833923",
+        "6345975085253358297751050638846919833013142450462810543971050115910612860460",
+        "2703875280053263252177031410407166981522153304496807669518295313468095058674",
+        "20550626512184448884716175825490086259235894802178999642552696391947509065676",
+        "15013718986700828670892638677446258841869291160144196138236407826511808592486",
+        "4682264015512203762723381542642871160915706748420642731100634327658667608042"
+      ],
+      [
+        "12834108073603507925748862283503586970613250684810871463629807392488566121352",
+        "8422606792378744850363509404165092879785007388646473871019846954536829739979",
+        "9339209090550177650528715604504958143078492516052997365409534971861874881780",
+        "9141831918422847136631159987994781722269889810731887947045878986971886716767",
+        "18329180549061748373684938917948729366786279119056979983310618862430068636631",
+        "2009551904565170718789964252583363785971078331314490170341991643087565227885",
+        "3859729780601667888281187160881197567257456581829833310753128034179061564519",
+        "8535335342372994336873304745903510543599314397287086554558824692658347277251",
+        "14148514289641991520153975838000398174635263164584825009402034843810351225518"
+      ]
+    ]
+  ]
+}
diff --git a/test/modules/src/poseidon_gencontract.js b/test/modules/src/poseidon_gencontract.js
new file mode 100644
index 0000000..1ca16a5
--- /dev/null
+++ b/test/modules/src/poseidon_gencontract.js
@@ -0,0 +1,208 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+const Contract = require("./evmasm");
+const { unstringifyBigInts } = require("ffjavascript").utils;
+const Web3Utils = require("web3-utils");
+
+const { C:K, M } = unstringifyBigInts(require("./poseidon_constants.json"));
+
+const N_ROUNDS_F = 8;
+const N_ROUNDS_P = [56, 57, 56, 60, 60, 63, 64, 63];
+
+function toHex256(a) {
+    let S = a.toString(16);
+    while (S.length < 64) S="0"+S;
+    return "0x" + S;
+}
+
+function createCode(nInputs) {
+
+    if (( nInputs<1) || (nInputs>8)) throw new Error("Invalid number of inputs. Must be 1<=nInputs<=8");
+    const t = nInputs + 1;
+    const nRoundsF = N_ROUNDS_F;
+    const nRoundsP = N_ROUNDS_P[t - 2];
+
+    const C = new Contract();
+
+    function saveM() {
+        for (let i=0; i<t; i++) {
+            for (let j=0; j<t; j++) {
+                C.push(toHex256(M[t-2][i][j]));
+                C.push((1+i*t+j)*32);
+                C.mstore();
+            }
+        }
+    }
+
+    function ark(r) {   // st, q
+        for (let i=0; i<t; i++) {
+            C.dup(t); // q, st, q
+            C.push(toHex256(K[t-2][r*t+i]));  // K, q, st, q
+            C.dup(2+i); // st[i], K, q, st, q
+            C.addmod(); // newSt[i], st, q
+            C.swap(1 + i); // xx, st, q
+            C.pop();
+        }
+    }
+
+    function sigma(p) {
+        // sq, q
+        C.dup(t);   // q, st, q
+        C.dup(1+p); // st[p] , q , st, q
+        C.dup(1);   // q, st[p] , q , st, q
+        C.dup(0);   // q, q, st[p] , q , st, q
+        C.dup(2);   // st[p] , q, q, st[p] , q , st, q
+        C.dup(0);   // st[p] , st[p] , q, q, st[p] , q , st, q
+        C.mulmod(); // st2[p], q, st[p] , q , st, q
+        C.dup(0);   // st2[p], st2[p], q, st[p] , q , st, q
+        C.mulmod(); // st4[p], st[p] , q , st, q
+        C.mulmod(); // st5[p], st, q
+        C.swap(1+p);
+        C.pop();      // newst, q
+    }
+
+    function mix() {
+        C.label("mix");
+        for (let i=0; i<t; i++) {
+            for (let j=0; j<t; j++) {
+                if (j==0) {
+                    C.dup(i+t);      // q, newSt, oldSt, q
+                    C.push((1+i*t+j)*32);
+                    C.mload();      // M, q, newSt, oldSt, q
+                    C.dup(2+i+j);    // oldSt[j], M, q, newSt, oldSt, q
+                    C.mulmod();      // acc, newSt, oldSt, q
+                } else {
+                    C.dup(1+i+t);    // q, acc, newSt, oldSt, q
+                    C.push((1+i*t+j)*32);
+                    C.mload();      // M, q, acc, newSt, oldSt, q
+                    C.dup(3+i+j);    // oldSt[j], M, q, acc, newSt, oldSt, q
+                    C.mulmod();      // aux, acc, newSt, oldSt, q
+                    C.dup(2+i+t);    // q, aux, acc, newSt, oldSt, q
+                    C.swap(2);       // acc, aux, q, newSt, oldSt, q
+                    C.addmod();      // acc, newSt, oldSt, q
+                }
+            }
+        }
+        for (let i=0; i<t; i++) {
+            C.swap((t -i) + (t -i-1));
+            C.pop();
+        }
+        C.push(0);
+        C.mload();
+        C.jmp();
+    }
+
+
+    // Check selector
+    C.push("0x0100000000000000000000000000000000000000000000000000000000");
+    C.push(0);
+    C.calldataload();
+    C.div();
+    C.dup(0);
+    C.push(Web3Utils.keccak256(`poseidon(uint256[${nInputs}])`).slice(0, 10)); // poseidon(uint256[n])
+    C.eq();
+    C.swap(1);
+    C.push(Web3Utils.keccak256(`poseidon(bytes32[${nInputs}])`).slice(0, 10)); // poseidon(bytes32[n])
+    C.eq();
+    C.or();
+    C.jmpi("start");
+    C.invalid();
+
+    C.label("start");
+
+    saveM();
+
+    C.push("0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001");  // q
+
+    // Load t values from the call data.
+    // The function has a single array param param
+    // [Selector (4)] [item1 (32)] [item2 (32)] ....
+    // Stack positions 0-nInputs.
+    for (let i=0; i<nInputs; i++) {
+        C.push(0x04+(0x20*(nInputs-i-1)));
+        C.calldataload();
+    }
+
+    C.push(0);
+
+    for (let i=0; i<nRoundsF+nRoundsP; i++) {
+        ark(i);
+        if ((i<nRoundsF/2) || (i>=nRoundsP+nRoundsF/2)) {
+            for (let j=0; j<t; j++) {
+                sigma(j);
+            }
+        } else {
+            sigma(0);
+        }
+        const strLabel = "aferMix"+i;
+        C._pushLabel(strLabel);
+        C.push(0);
+        C.mstore();
+        C.jmp("mix");
+        C.label(strLabel);
+    }
+
+    C.push("0x00");
+    C.mstore();     // Save it to pos 0;
+    C.push("0x20");
+    C.push("0x00");
+    C.return();
+
+    mix();
+
+    return C.createTxData();
+}
+
+function generateABI(nInputs) {
+    return [
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "internalType": `bytes32[${nInputs}]`,
+                    "name": "input",
+                    "type": `bytes32[${nInputs}]`
+                }
+            ],
+            "name": "poseidon",
+            "outputs": [
+                {
+                    "internalType": "bytes32",
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "payable": false,
+            "stateMutability": "pure",
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "internalType": `uint256[${nInputs}]`,
+                    "name": "input",
+                    "type": `uint256[${nInputs}]`
+                }
+            ],
+            "name": "poseidon",
+            "outputs": [
+                {
+                    "internalType": "uint256",
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "stateMutability": "pure",
+            "type": "function"
+        }
+    ];
+}
+
+module.exports.generateABI = generateABI;
+module.exports.createCode = createCode;
+
+
diff --git a/test/modules/src/poseidon_printcontract.js b/test/modules/src/poseidon_printcontract.js
new file mode 100644
index 0000000..0ae977d
--- /dev/null
+++ b/test/modules/src/poseidon_printcontract.js
@@ -0,0 +1,13 @@
+const poseidonGenContract = require("./poseidon_gencontract");
+
+if (process.argv.length != 3) {
+    console.log("Usage: node poseidon_gencontract.js [numberOfInputs]");
+    process.exit(1);
+}
+
+const nInputs = Number(process.argv[2]);
+
+console.log(nInputs);
+
+console.log(poseidonGenContract.createCode(nInputs));
+
diff --git a/test/modules/src/poseidon_printmatrix.js b/test/modules/src/poseidon_printmatrix.js
new file mode 100644
index 0000000..0c90a45
--- /dev/null
+++ b/test/modules/src/poseidon_printmatrix.js
@@ -0,0 +1,22 @@
+
+
+const Poseidon = require("./poseidon.js");
+
+const M = Poseidon.getMatrix();
+
+let S = "[\n    ";
+
+for (let i=0; i<M.length; i++) {
+    const LC = M[i];
+    S = S + "[\n";
+    for (let j=0; j<LC.length; j++) {
+        S = S + "        " + M[i][j].toString();
+        if (j<LC.length-1) S = S + ",";
+        S = S + "\n";
+    }
+    S = S + "    ]";
+    if (i<M.length-1) S = S + ",";
+}
+S=S+ "\n]\n";
+
+console.log(S);
diff --git a/test/modules/src/smt.js b/test/modules/src/smt.js
new file mode 100644
index 0000000..6899090
--- /dev/null
+++ b/test/modules/src/smt.js
@@ -0,0 +1,301 @@
+const Scalar = require("ffjavascript").Scalar;
+const SMTMemDB = require("./smt_memdb");
+const {hash0, hash1, F} = require("./smt_hashes_poseidon");
+
+class SMT {
+
+    constructor(db, root) {
+        this.db = db;
+        this.root = root;
+    }
+
+    _splitBits(_key) {
+        const res = Scalar.bits(_key);
+
+        while (res.length<256) res.push(false);
+
+        return res;
+    }
+
+    async update(_key, _newValue) {
+        const key = Scalar.e(_key);
+        const newValue = F.e(_newValue);
+
+
+        const resFind = await this.find(key);
+        const res = {};
+        res.oldRoot = this.root;
+        res.oldKey = key;
+        res.oldValue = resFind.foundValue;
+        res.newKey = key;
+        res.newValue = newValue;
+        res.siblings = resFind.siblings;
+
+        const ins = [];
+        const dels = [];
+
+        let rtOld = hash1(key, resFind.foundValue);
+        let rtNew = hash1(key, newValue);
+        ins.push([rtNew, [1, key, newValue ]]);
+        dels.push(rtOld);
+
+        const keyBits = this._splitBits(key);
+        for (let level = resFind.siblings.length-1; level >=0; level--) {
+            let oldNode, newNode;
+            const sibling = resFind.siblings[level];
+            if (keyBits[level]) {
+                oldNode = [sibling, rtOld];
+                newNode = [sibling, rtNew];
+            } else {
+                oldNode = [rtOld, sibling];
+                newNode = [rtNew, sibling];
+            }
+            rtOld = hash0(oldNode[0], oldNode[1]);
+            rtNew = hash0(newNode[0], newNode[1]);
+            dels.push(rtOld);
+            ins.push([rtNew, newNode]);
+        }
+
+        res.newRoot = rtNew;
+
+        await this.db.multiDel(dels);
+        await this.db.multiIns(ins);
+        await this.db.setRoot(rtNew);
+        this.root = rtNew;
+
+        return res;
+    }
+
+    async delete(_key) {
+        const key = Scalar.e(_key);
+
+        const resFind = await this.find(key);
+        if (!resFind.found) throw new Error("Key does not exists");
+
+        const res = {
+            siblings: [],
+            delKey: key,
+            delValue: resFind.foundValue
+        };
+
+        const dels = [];
+        const ins = [];
+        let rtOld = hash1(key, resFind.foundValue);
+        let rtNew;
+        dels.push(rtOld);
+
+        let mixed;
+        if (resFind.siblings.length > 0) {
+            const record = await this.db.get(resFind.siblings[resFind.siblings.length - 1]);
+            if ((record.length == 3)&&(F.eq(record[0], F.one))) {
+                mixed = false;
+                res.oldKey = record[1];
+                res.oldValue = record[2];
+                res.isOld0 = false;
+                rtNew = resFind.siblings[resFind.siblings.length - 1];
+            } else if (record.length == 2) {
+                mixed = true;
+                res.oldKey = key;
+                res.oldValue = F.zero;
+                res.isOld0 = true;
+                rtNew = F.zero;
+            } else {
+                throw new Error("Invalid node. Database corrupted");
+            }
+        } else {
+            rtNew = F.zero;
+            res.oldKey = key;
+            res.oldValue = F.zero;
+            res.isOld0 = true;
+        }
+
+        const keyBits = this._splitBits(key);
+
+        for (let level = resFind.siblings.length-1; level >=0; level--) {
+            let newSibling = resFind.siblings[level];
+            if ((level == resFind.siblings.length-1)&&(!res.isOld0)) {
+                newSibling = F.zero;
+            }
+            const oldSibling = resFind.siblings[level];
+            if (keyBits[level]) {
+                rtOld = hash0(oldSibling, rtOld);
+            } else {
+                rtOld = hash0(rtOld, oldSibling);
+            }
+            dels.push(rtOld);
+            if (!F.isZero(newSibling)) {
+                mixed = true;
+            }
+
+            if (mixed) {
+                res.siblings.unshift(resFind.siblings[level]);
+                let newNode;
+                if (keyBits[level]) {
+                    newNode = [newSibling, rtNew];
+                } else {
+                    newNode = [rtNew, newSibling];
+                }
+                rtNew = hash0(newNode[0], newNode[1]);
+                ins.push([rtNew, newNode]);
+            }
+        }
+
+        await this.db.multiIns(ins);
+        await this.db.setRoot(rtNew);
+        this.root = rtNew;
+        await this.db.multiDel(dels);
+
+        res.newRoot = rtNew;
+        res.oldRoot = rtOld;
+
+        return res;
+    }
+
+    async insert(_key, _value) {
+        const key = Scalar.e(_key);
+        const value = F.e(_value);
+        let addedOne = false;
+        const res = {};
+        res.oldRoot = this.root;
+        const newKeyBits = this._splitBits(key);
+
+        let rtOld;
+
+        const resFind = await this.find(key);
+
+        if (resFind.found) throw new Error("Key already exists");
+
+        res.siblings = resFind.siblings;
+        let mixed;
+
+        if (!resFind.isOld0) {
+            const oldKeyits = this._splitBits(resFind.notFoundKey);
+            for (let i= res.siblings.length; oldKeyits[i] == newKeyBits[i]; i++) {
+                res.siblings.push(F.zero);
+            }
+            rtOld = hash1(resFind.notFoundKey, resFind.notFoundValue);
+            res.siblings.push(rtOld);
+            addedOne = true;
+            mixed = false;
+        } else if (res.siblings.length >0) {
+            mixed = true;
+            rtOld = F.zero;
+        }
+
+        const inserts = [];
+        const dels = [];
+
+        let rt = hash1(key, value);
+        inserts.push([rt,[1, key, value]] );
+
+        for (let i=res.siblings.length-1; i>=0; i--) {
+            if ((i<res.siblings.length-1)&&(!F.isZero(res.siblings[i]))) {
+                mixed = true;
+            }
+            if (mixed) {
+                const oldSibling = resFind.siblings[i];
+                if (newKeyBits[i]) {
+                    rtOld = hash0(oldSibling, rtOld);
+                } else {
+                    rtOld = hash0(rtOld, oldSibling);
+                }
+                dels.push(rtOld);
+            }
+
+
+            let newRt;
+            if (newKeyBits[i]) {
+                newRt = hash0(res.siblings[i], rt);
+                inserts.push([newRt,[res.siblings[i], rt]] );
+            } else {
+                newRt = hash0(rt, res.siblings[i]);
+                inserts.push([newRt,[rt, res.siblings[i]]] );
+            }
+            rt = newRt;
+        }
+
+        if (addedOne) res.siblings.pop();
+        while ((res.siblings.length>0) && (F.isZero(res.siblings[res.siblings.length-1]))) {
+            res.siblings.pop();
+        }
+        res.oldKey = resFind.notFoundKey;
+        res.oldValue = resFind.notFoundValue;
+        res.newRoot = rt;
+        res.isOld0 = resFind.isOld0;
+
+
+        await this.db.multiIns(inserts);
+        await this.db.setRoot(rt);
+        this.root = rt;
+        await this.db.multiDel(dels);
+
+        return res;
+    }
+
+    async find(key) {
+        const keyBits = this._splitBits(key);
+        return await this._find(key, keyBits, this.root, 0);
+    }
+
+    async _find(key, keyBits, root, level) {
+        if (typeof root === "undefined") root = this.root;
+
+        let res;
+        if (F.isZero(root)) {
+            res = {
+                found: false,
+                siblings: [],
+                notFoundKey: key,
+                notFoundValue: F.zero,
+                isOld0: true
+            };
+            return res;
+        }
+
+        const record = await this.db.get(root);
+
+        if ((record.length==3)&&(F.eq(record[0],F.one))) {
+            if (F.eq(record[1],key)) {
+                res = {
+                    found: true,
+                    siblings: [],
+                    foundValue: record[2],
+                    isOld0: false
+                };
+            } else {
+                res = {
+                    found: false,
+                    siblings: [],
+                    notFoundKey: record[1],
+                    notFoundValue: record[2],
+                    isOld0: false
+                };
+            }
+        } else {
+            if (keyBits[level] == 0) {
+                res = await this._find(key, keyBits, record[0], level+1);
+                res.siblings.unshift(record[1]);
+            } else {
+                res = await this._find(key, keyBits, record[1], level+1);
+                res.siblings.unshift(record[0]);
+            }
+        }
+        return res;
+    }
+}
+
+async function loadFromFile(fileName) {
+
+}
+
+async function newMemEmptyTrie() {
+    const db = new SMTMemDB();
+    const rt = await db.getRoot();
+    const smt = new SMT(db, rt);
+    return smt;
+}
+
+module.exports.loadFromFile = loadFromFile;
+module.exports.newMemEmptyTrie = newMemEmptyTrie;
+module.exports.SMT = SMT;
+module.exports.SMTMemDB = SMTMemDB;
diff --git a/test/modules/src/smt_hashes_mimc.js b/test/modules/src/smt_hashes_mimc.js
new file mode 100644
index 0000000..1cc2921
--- /dev/null
+++ b/test/modules/src/smt_hashes_mimc.js
@@ -0,0 +1,12 @@
+const mimc7 = require("./mimc7");
+const bigInt = require("big-integer");
+
+exports.hash0 = function (left, right) {
+    return mimc7.multiHash(left, right);
+};
+
+exports.hash1 = function(key, value) {
+    return mimc7.multiHash([key, value], bigInt.one);
+};
+
+exports.F = mimc7.F;
diff --git a/test/modules/src/smt_hashes_poseidon.js b/test/modules/src/smt_hashes_poseidon.js
new file mode 100644
index 0000000..0077f27
--- /dev/null
+++ b/test/modules/src/smt_hashes_poseidon.js
@@ -0,0 +1,18 @@
+
+const ZqField = require("ffjavascript").ZqField;
+const Scalar = require("ffjavascript").Scalar;
+
+const poseidon = require("./poseidon");
+
+const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
+
+
+exports.hash0 = function (left, right) {
+    return poseidon([left, right]);
+};
+
+exports.hash1 = function(key, value) {
+    return poseidon([key, value, F.one]);
+};
+
+exports.F = F;
diff --git a/test/modules/src/smt_memdb.js b/test/modules/src/smt_memdb.js
new file mode 100644
index 0000000..fbd2068
--- /dev/null
+++ b/test/modules/src/smt_memdb.js
@@ -0,0 +1,63 @@
+
+const Scalar = require("ffjavascript").Scalar;
+const ZqField = require("ffjavascript").ZqField;
+
+// Prime 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001
+const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
+
+class SMTMemDb {
+    constructor() {
+        this.nodes = {};
+        this.root = F.zero;
+    }
+
+    async getRoot() {
+        return this.root;
+    }
+
+    _key2str(k) {
+        // const keyS = bigInt(key).leInt2Buff(32).toString("hex");
+        const keyS = k.toString();
+        return keyS;
+    }
+
+    _normalize(n) {
+        for (let i=0; i<n.length; i++) {
+            n[i] = F.e(n[i]);
+        }
+    }
+
+    async get(key) {
+        const keyS = this._key2str(key);
+        return this.nodes[keyS];
+    }
+
+    async multiGet(keys) {
+        const promises = [];
+        for (let i=0; i<keys.length; i++) {
+            promises.push(this.get(keys[i]));
+        }
+        return await Promise.all(promises);
+    }
+
+    async setRoot(rt) {
+        this.root = rt;
+    }
+
+    async multiIns(inserts) {
+        for (let i=0; i<inserts.length; i++) {
+            const keyS = this._key2str(inserts[i][0]);
+            this._normalize(inserts[i][1]);
+            this.nodes[keyS] = inserts[i][1];
+        }
+    }
+
+    async multiDel(dels) {
+        for (let i=0; i<dels.length; i++) {
+            const keyS = this._key2str(dels[i]);
+            delete this.nodes[keyS];
+        }
+    }
+}
+
+module.exports = SMTMemDb;
diff --git a/test/modules/tsc.sh b/test/modules/tsc.sh
new file mode 100644
index 0000000..5c8e3f2
--- /dev/null
+++ b/test/modules/tsc.sh
@@ -0,0 +1,5 @@
+tsc maci-domainobjs.ts \
+    --esModuleInterop true \
+    --moduleResolution node \
+    --module commonjs \
+    --target es2020
\ No newline at end of file