public ExecutionStatus KeyGenCommit(UInt256 cycle, byte[] commitment, byte[][] encryptedRows,
SystemContractExecutionFrame frame)
{
Logger.LogDebug(
$"KeyGenCommit({commitment.ToHex()}, [{string.Join(", ", encryptedRows.Select(r => r.ToHex()))}])");
if (cycle.ToBigInteger() != GetConsensusGeneration(frame))
{
Logger.LogWarning($"Invalid cycle: {cycle}, now is {GetConsensusGeneration(frame)}");
return(ExecutionStatus.Ok);
}
try
{
var c = Commitment.FromBytes(commitment);
if (!c.IsValid())
{
throw new Exception();
}
var n = _nextValidators.Get().Length / CryptoUtils.PublicKeyLength;
if (c.Degree != (n - 1) / 3)
{
throw new Exception();
}
if (encryptedRows.Length != n)
{
throw new Exception();
}
}
catch
{
Logger.LogError("GovernanceContract is halted in KeyGenCommit");
return(ExecutionStatus.ExecutionHalted);
}
Emit(GovernanceInterface.EventKeygenCommit, commitment, encryptedRows);
frame.ReturnValue = new byte[] { };
frame.UseGas(GasMetering.KeygenCommitCost);
return(ExecutionStatus.Ok);
}
public ulong GetLastSuccessfulKeygenBlock()
{
var storageVariable = new StorageVariable(
ContractRegisterer.GovernanceContract,
_stateManager.LastApprovedSnapshot.Storage,
new BigInteger(8).ToUInt256()
);
var rawValue = storageVariable.Get();
if (rawValue.Length == 0)
{
return(0);
}
return((ulong)rawValue.ToUInt256().ToBigInteger());
}
private int?GetPlayersCount()
{
var count = _playersCount.Get();
Logger.LogTrace($"Players count: {count.ToHex()}");
if (count.Length == 0)
{
return(null);
}
try
{
return(count.AsReadOnlySpan().ToInt32());
}
catch (Exception)
{
return(null);
}
}
private PublicKey GetTpkeKey()
{
var tpkePublicKey = _tpkeKey.Get();
return(PublicKey.FromBytes(tpkePublicKey));
}
private Money GetCollectedFees()
{
var fees = _collectedFees.Get();
return(fees.ToUInt256().ToMoney());
}
private PublicKeySet GetTSKeys()
{
var tsKeys = _tsKeys.Get();
return(PublicKeySet.FromBytes(tsKeys));
}
private UInt256 GetBlockReward()
{
var reward = _blockReward.Get();
return(reward.ToUInt256());
}
// Every time a node starts, it first tries to build the genesis block
public bool TryBuildGenesisBlock()
{
// genesis block is built from the config.json file
// genesis block mints tokens to the validators for the first cycle
var genesisBlock = _genesisBuilder.Build();
// if genesis block can already be found, we return immediately
if (_stateManager.LastApprovedSnapshot.Blocks.GetBlockByHeight(0) != null)
{
return(false);
}
var snapshot = _stateManager.NewSnapshot();
var genesisConfig = _configManager.GetConfig <GenesisConfig>("genesis");
if (genesisConfig is null)
{
return(false);
}
genesisConfig.ValidateOrThrow();
var initialConsensusState = new ConsensusState(
genesisConfig.ThresholdEncryptionPublicKey.HexToBytes(),
genesisConfig.Validators.Select(v => new ValidatorCredentials
(
v.EcdsaPublicKey.HexToBytes().ToPublicKey(),
v.ThresholdSignaturePublicKey.HexToBytes()
)).ToArray()
);
snapshot.Validators.SetConsensusState(initialConsensusState);
// stake delegation happens even before genesis block
// stake delegation means - some other address stakes for the validators
// config.json keeps the stakerAddress and the stakeAmount for each of the validators
// init system contracts storage
var dummyStakerPub = new string('f', CryptoUtils.PublicKeyLength * 2).HexToBytes();
snapshot.Storage.SetRawValue(
ContractRegisterer.StakingContract,
new BigInteger(6).ToUInt256().Buffer,
dummyStakerPub
);
// TODO: get rid of explicit numbering of fields
var initialVrfSeed = Encoding.ASCII.GetBytes("test");
snapshot.Storage.SetRawValue(
ContractRegisterer.StakingContract,
new BigInteger(7).ToUInt256().Buffer,
initialVrfSeed
);
var initialBlockReward = Money.Parse(genesisConfig.BlockReward).ToUInt256().ToBytes();
snapshot.Storage.SetRawValue(
ContractRegisterer.GovernanceContract,
new BigInteger(3).ToUInt256().Buffer,
initialBlockReward
);
var initialBasicGasPrice = Money.Parse(genesisConfig.BasicGasPrice).ToUInt256().ToBytes();
snapshot.Storage.SetRawValue(
ContractRegisterer.GovernanceContract,
new BigInteger(8).ToUInt256().Buffer,
initialBasicGasPrice
);
// The followings are the variables used in stakingContract
// This variables are stored in the storage snapshot and is a part of the chain
// To understand the what each variables represent, refer to StakingContract.cs
// We do the stake delegation even before the execution of genesis block
var _userToStake = new StorageMapping(
ContractRegisterer.StakingContract,
snapshot.Storage,
new BigInteger(3).ToUInt256()
);
var _stakers = new StorageVariable(
ContractRegisterer.StakingContract,
snapshot.Storage,
new BigInteger(6).ToUInt256()
);
var _userToPubKey = new StorageMapping(
ContractRegisterer.StakingContract,
snapshot.Storage,
new BigInteger(2).ToUInt256()
);
var _pubKeyToStaker = new StorageMapping(
ContractRegisterer.StakingContract,
snapshot.Storage,
new BigInteger(12).ToUInt256()
);
var _userToStartCycle = new StorageMapping(
ContractRegisterer.StakingContract,
snapshot.Storage,
new BigInteger(4).ToUInt256()
);
foreach (var validator in genesisConfig.Validators)
{
if (validator.StakeAmount == null || validator.StakerAddress == null)
{
continue;
}
var validatorPublicKey = validator.EcdsaPublicKey.HexToBytes();
var validatorAddress = Hepler.PublicKeyToAddress(validatorPublicKey).ToBytes();
var stakerAddress = validator.StakerAddress.HexToBytes();
// add balance to staking contract
var stakeAmount = Money.Parse(validator.StakeAmount);
snapshot.Balances.AddBalance(ContractRegisterer.StakingContract, stakeAmount, true);
// set stake value
_userToStake.SetValue(validatorAddress, stakeAmount.ToUInt256().ToBytes());
// update stakers list
var stakers = _stakers.Get();
_stakers.Set(stakers.Concat(validatorPublicKey).ToArray());
// user to public key and public key to staker
_userToPubKey.SetValue(validatorAddress, validatorPublicKey);
_pubKeyToStaker.SetValue(validatorPublicKey, stakerAddress);
// set start cycle
_userToStartCycle.SetValue(validatorAddress, BitConverter.GetBytes(0));
}
_stateManager.Approve();
// emulate and execute the genesis block
var(error, removeTransactions, stateHash, relayTransactions) =
Emulate(genesisBlock.Block, genesisBlock.Transactions);
if (error != OperatingError.Ok)
{
throw new InvalidBlockException(error);
}
if (removeTransactions.Count != 0)
{
throw new InvalidBlockException(OperatingError.InvalidTransaction);
}
if (relayTransactions.Count != 0)
{
throw new InvalidBlockException(OperatingError.InvalidTransaction);
}
genesisBlock.Block.Header.StateHash = stateHash;
genesisBlock.Block.Hash = genesisBlock.Block.Header.Keccak();
error = Execute(genesisBlock.Block, genesisBlock.Transactions, commit: true, checkStateHash: true);
if (error != OperatingError.Ok)
{
throw new InvalidBlockException(error);
}
_stateManager.Commit();
BlockPersisted(genesisBlock.Block);
return(true);
}