public CommitMessage StartKeygen()
{
var biVarPoly = BiVarSymmetricPolynomial.Random(Faulty);
var commitment = biVarPoly.Commit();
var rows = Enumerable.Range(1, Players)
.Select(i => biVarPoly.Evaluate(i))
.Select((row, i) => EncryptRow(row, _publicKeys[i]))
.ToArray();
return(new CommitMessage
{
Commitment = commitment,
EncryptedRows = rows
});
}
public void SymmetricPolynomialIsSymmetric()
{
var rnd = new Random();
var p = BiVarSymmetricPolynomial.Random(5);
int x = rnd.Next(), y = rnd.Next();
var vxy = Eval(p, x, y);
var vyx = Eval(p, y, x);
Assert.AreEqual(vxy, vyx);
var c = p.Commit();
var cxy = c.Evaluate(x, y);
var cyx = c.Evaluate(y, x);
Assert.AreEqual(cxy, cyx);
}
private TransactionReceipt MakeCommitTransaction()
{
var biVarPoly = BiVarSymmetricPolynomial.Random(0);
var commitment = biVarPoly.Commit().ToBytes();
var row = new Byte[0];
var tx = _transactionBuilder.InvokeTransactionWithGasPrice(
_wallet.EcdsaKeyPair.PublicKey.GetAddress(),
ContractRegisterer.GovernanceContract,
Money.Zero,
GovernanceInterface.MethodKeygenCommit,
0,
UInt256Utils.ToUInt256(GovernanceContract.GetCycleByBlockNumber(_stateManager.LastApprovedSnapshot.Blocks.GetTotalBlockHeight())),
commitment,
new byte[][] { row }
);
var res = Signer.Sign(tx, _wallet.EcdsaKeyPair, true);
Assert.False(_eventData.ContainsKey(res.Hash));
_eventData.Add(res.Hash,
ByteString.CopyFrom(ContractEncoder.Encode(GovernanceInterface.EventKeygenCommit,
commitment, new byte[][] { row })));
return(res);
}
private static Fr Eval(BiVarSymmetricPolynomial p, int x, int y)
{
var t = p.Evaluate(x).ToArray();
return(MclBls12381.EvaluatePolynomial(t, Fr.FromInt(y)));
}