public BlsSignature SignHashWithDomain(BlsPublicKey blsPublicKey, Hash32 hash, Domain domain)
{
if (_publicKeyToBls.Count == 0)
{
var keyCount = GetPublicKeys().Count();
}
BLS bls = _publicKeyToBls[blsPublicKey];
Span <byte> destination = stackalloc byte[BlsSignature.Length];
bool success = bls.TrySignHash(hash.AsSpan(), destination, out int bytesWritten, domain.AsSpan());
if (!success || bytesWritten != BlsSignature.Length)
{
throw new Exception($"Failure signing hash {hash}, domain {domain} for public key {blsPublicKey}.");
}
BlsSignature blsSignature = new BlsSignature(destination.ToArray());
return(blsSignature);
}
private BlsSignature GetEpochSignature(IServiceProvider testServiceProvider, byte[] privateKey, ForkVersion forkVersion, Slot slot)
{
SignatureDomains signatureDomains = testServiceProvider.GetService <IOptions <SignatureDomains> >().Value;
BeaconChainUtility beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
var domain = beaconChainUtility.ComputeDomain(signatureDomains.Randao, forkVersion);
var epoch = beaconChainUtility.ComputeEpochAtSlot(slot);
var epochRoot = epoch.HashTreeRoot();
BLSParameters parameters = new BLSParameters()
{
PrivateKey = privateKey
};
BLS bls = BLS.Create(parameters);
var destination = new Span <byte>(new byte[96]);
bls.TrySignHash(epochRoot.AsSpan(), destination, out var bytesWritten, domain.AsSpan());
var signature = new BlsSignature(destination.ToArray());
return(signature);
}
public void QuickStartGenesis()
{
QuickStartParameters quickStartParameters = _quickStartParameterOptions.CurrentValue;
_logger.LogWarning(0, "Mocked quick start with genesis time {GenesisTime:n0} and {ValidatorCount} validators.",
quickStartParameters.GenesisTime, quickStartParameters.ValidatorCount);
GweiValues gweiValues = _gweiValueOptions.CurrentValue;
InitialValues initialValues = _initialValueOptions.CurrentValue;
SignatureDomains signatureDomains = _signatureDomainOptions.CurrentValue;
// Fixed amount
Gwei amount = gweiValues.MaximumEffectiveBalance;
// Build deposits
var depositDataList = new List <DepositData>();
var deposits = new List <Deposit>();
for (ulong validatorIndex = 0uL; validatorIndex < quickStartParameters.ValidatorCount; validatorIndex++)
{
var privateKey = GeneratePrivateKey(validatorIndex);
// Public Key
BLSParameters blsParameters = new BLSParameters()
{
PrivateKey = privateKey
};
using BLS bls = BLS.Create(blsParameters);
var publicKeyBytes = new byte[BlsPublicKey.Length];
bls.TryExportBLSPublicKey(publicKeyBytes, out int publicKeyBytesWritten);
BlsPublicKey publicKey = new BlsPublicKey(publicKeyBytes);
// Withdrawal Credentials
var withdrawalCredentialBytes = _cryptographyService.Hash(publicKey.AsSpan()).AsSpan().ToArray();
withdrawalCredentialBytes[0] = initialValues.BlsWithdrawalPrefix;
Hash32 withdrawalCredentials = new Hash32(withdrawalCredentialBytes);
// Build deposit data
DepositData depositData = new DepositData(publicKey, withdrawalCredentials, amount);
// Sign deposit data
Hash32 depositDataSigningRoot = depositData.SigningRoot();
Domain domain = _beaconChainUtility.ComputeDomain(signatureDomains.Deposit);
var destination = new byte[96];
bls.TrySignHash(depositDataSigningRoot.AsSpan(), destination, out int bytesWritten, domain.AsSpan());
BlsSignature depositDataSignature = new BlsSignature(destination);
depositData.SetSignature(depositDataSignature);
// Deposit
// TODO: This seems a very inefficient way (copied from tests) as it recalculates the merkle tree each time
// (you only need to add one node)
// TODO: Add some tests around quick start, then improve
int index = depositDataList.Count;
depositDataList.Add(depositData);
Hash32 root = depositDataList.HashTreeRoot((ulong)1 << _chainConstants.DepositContractTreeDepth);
var allLeaves = depositDataList.Select(x => x.HashTreeRoot());
var tree = CalculateMerkleTreeFromLeaves(allLeaves);
var merkleProof = GetMerkleProof(tree, index, 32);
var proof = new List <Hash32>(merkleProof);
var indexBytes = new Span <byte>(new byte[32]);
BitConverter.TryWriteBytes(indexBytes, (ulong)index + 1);
if (!BitConverter.IsLittleEndian)
{
indexBytes.Slice(0, 8).Reverse();
}
Hash32 indexHash = new Hash32(indexBytes);
proof.Add(indexHash);
Hash32 leaf = depositData.HashTreeRoot();
_beaconChainUtility.IsValidMerkleBranch(leaf, proof, _chainConstants.DepositContractTreeDepth + 1, (ulong)index, root);
Deposit deposit = new Deposit(proof, depositData);
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Quick start adding deposit for mocked validator {ValidatorIndex} with public key {PublicKey}.",
validatorIndex, publicKey.ToString().Substring(0, 12));
}
deposits.Add(deposit);
}
BeaconState genesisState = _beaconChain.InitializeBeaconStateFromEth1(quickStartParameters.Eth1BlockHash, quickStartParameters.Eth1Timestamp, deposits);
// We use the state directly, and don't test IsValid
genesisState.SetGenesisTime(quickStartParameters.GenesisTime);
IStore store = _forkChoice.GetGenesisStore(genesisState);
_logger.LogDebug("Quick start genesis store created with genesis time {GenesisTime:n0}.", store.GenesisTime);
}