chore: init versionA crate

.gitignore

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+target
+Cargo.lock

versionA/Cargo.toml

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+[package]
+name = "versionA"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+ark-poly-commit = "0.3.0"
+ark-ec = "0.3.0"
+ark-bls12-381 = "0.3.0"
+ark-std = "0.3.0"
+ark-poly = "0.3.0"

versionA/src/main.rs

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+use std::collections::HashMap;
+
+use ark_bls12_381::*;
+use ark_ec::{bls12::Bls12, PairingEngine};
+use ark_poly::univariate::DensePolynomial;
+use ark_poly_commit::kzg10::*;
+use ark_std::test_rng;
+
+type UniPoly_381 = DensePolynomial<<Bls12_381 as PairingEngine>::Fr>;
+
+struct RLN {
+    limit: u8,
+    trusted_setup_params: UniversalParams<Bls12<Parameters>>,
+}
+
+impl RLN {
+    fn new(limit: u8) -> Self {
+        let rng = &mut test_rng();
+        let trusted_setup_params =
+            KZG10::<Bls12_381, UniPoly_381>::setup(limit as usize, false, rng)
+                .expect("Setup failed");
+
+        Self {
+            limit,
+            trusted_setup_params,
+        }
+    }
+}
+
+struct User {}
+
+impl User {
+    fn new() -> Self {
+        Self {}
+    }
+
+    fn send(&self, message: &str) {
+        todo!()
+    }
+}
+
+fn main() {
+    let rln = RLN::new(1);
+    let user = User::new();
+
+    // user.send("Hello");
+    // user.send("I'm spammer");
+
+    let rng = &mut test_rng();
+    let trusted_setup_params =
+        KZG10::<Bls12_381, UniPoly_381>::setup(1, false, rng).expect("Setup failed");
+
+    println!("{:#?}", trusted_setup_params);
+}