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[consensus] lottery with headstart, for zero-stake participation

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This commit is contained in:
mohab metwally
2023-01-25 03:50:47 +02:00
parent a56047ffc1
commit 0a8392897e
3 changed files with 16 additions and 5 deletions
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4
proof/lead.zk
View File

@@ -20,6 +20,7 @@ contract "Lead" {
Base mu_y,
Base sigma1,
Base sigma2,
Base headstart,
}
circuit "Lead" {
@@ -83,10 +84,11 @@ circuit "Lead" {
term2_1 = base_mul(sigma2, value);
term2 = base_mul(term2_1, value);
target = base_add(term1, term2);
shifted_target = base_add(target, headstart);
#lottery
#constrain public value sigma1
constrain_instance(sigma1);
# constrain public value sigma2
constrain_instance(sigma2);
less_than_loose(y, target);
less_than_loose(y, shifted_target);
}

2
src/consensus/constants.rs
View File

@@ -71,7 +71,7 @@ lazy_static! {
pub static ref MAX_DER: Float10 = Float10::try_from("0.1").unwrap();
pub static ref MIN_DER: Float10 = Float10::try_from("-0.1").unwrap();
pub static ref MAX_F: Float10 = Float10::try_from("0.99").unwrap();
pub static ref MIN_F: Float10 = Float10::try_from("0.05").unwrap();
pub static ref MIN_F: Float10 = Float10::try_from("0.01").unwrap();
}

15
src/consensus/lead_coin.rs
View File

@@ -30,9 +30,9 @@ use halo2_proofs::{arithmetic::Field, circuit::Value};
use log::info;
use rand::rngs::OsRng;
use super::constants::EPOCH_LENGTH;
use super::constants::{EPOCH_LENGTH};
use crate::{
consensus::{constants, TransferStx, TxRcpt},
consensus::{constants, TransferStx, TxRcpt, Float10, utils::fbig2base},
zk::{
proof::{Proof, ProvingKey},
vm::ZkCircuit,
@@ -213,6 +213,7 @@ impl LeadCoin {
// rho
let rho_msg = [seed, rho_mu];
let rho = poseidon_hash(rho_msg);
let headstart = Self::headstart();
let public_inputs = vec![
pk,
*c1_cm_coord.x(),
@@ -228,6 +229,7 @@ impl LeadCoin {
rho,
sigma1,
sigma2,
headstart,
];
public_inputs
}
@@ -282,6 +284,12 @@ impl LeadCoin {
}
*/
pub fn headstart() -> pallas::Base {
let headstart = constants::MIN_F.clone() * Float10::try_from(constants::P.clone()).unwrap();
let headstart_base = fbig2base(headstart);
headstart_base
}
pub fn is_leader(
&self,
sigma1: pallas::Base,
@@ -298,7 +306,8 @@ impl LeadCoin {
let value = pallas::Base::from(self.value);
let target = sigma1 * value + sigma2 * value * value;
let headstart = Self::headstart();
let target = sigma1 * value + sigma2 * value * value + headstart;
let y_t_str = format!("{:?},{:?}\n", y, target);
let f =