public static Transaction BuildTransaction(Address adrTo = null, ulong nonce = 0, ECKeyPair keyPair = null)
{
keyPair = keyPair ?? new KeyPairGenerator().Generate();
var tx = new Transaction();
tx.From = keyPair.GetAddress();
tx.To = adrTo ?? Address.FromRawBytes(Hash.Generate().ToByteArray());
tx.IncrementId = nonce;
tx.Sig = new Signature
{
P = ByteString.CopyFrom(keyPair.PublicKey.Q.GetEncoded())
};
tx.Fee = TxPoolConfig.Default.FeeThreshold + 1;
tx.MethodName = "hello world";
tx.Params = ByteString.CopyFrom(new Parameters
{
Params = { new Param
{
IntVal = 1
} }
}.ToByteArray());
// Serialize and hash the transaction
Hash hash = tx.GetHash();
// Sign the hash
ECSigner signer = new ECSigner();
ECSignature signature = signer.Sign(keyPair, hash.DumpByteArray());
// Update the signature
tx.Sig.R = ByteString.CopyFrom(signature.R);
tx.Sig.S = ByteString.CopyFrom(signature.S);
return(tx);
}
/// <summary>
/// Generate a system tx for parent chain block info and broadcast it.
/// </summary>
/// <returns></returns>
private async Task GenerateTransactionWithParentChainBlockInfo()
{
var parentChainBlockInfo = GetParentChainBlockInfo();
if (parentChainBlockInfo == null)
{
return;
}
try
{
var bn = await _blockChain.GetCurrentBlockHeightAsync();
bn = bn > 4 ? bn - 4 : 0;
var bh = bn == 0 ? Hash.Genesis : (await _blockChain.GetHeaderByHeightAsync(bn)).GetHash();
var bhPref = bh.Value.Where((x, i) => i < 4).ToArray();
var tx = new Transaction
{
From = _keyPair.GetAddress(),
To = AddressHelpers.GetSystemContractAddress(Config.ChainId,
SmartContractType.SideChainContract.ToString()),
RefBlockNumber = bn,
RefBlockPrefix = ByteString.CopyFrom(bhPref),
MethodName = "WriteParentChainBlockInfo",
Sig = new Signature
{
P = ByteString.CopyFrom(_keyPair.GetEncodedPublicKey())
},
Type = TransactionType.CrossChainBlockInfoTransaction,
Params = ByteString.CopyFrom(ParamsPacker.Pack(parentChainBlockInfo)),
Time = Timestamp.FromDateTime(DateTime.UtcNow)
};
// sign tx
var signature = new ECSigner().Sign(_keyPair, tx.GetHash().DumpByteArray());
tx.Sig.R = ByteString.CopyFrom(signature.R);
tx.Sig.S = ByteString.CopyFrom(signature.S);
await InsertTransactionToPool(tx);
_logger?.Trace($"Generated Cross chain info transaction {tx.GetHash()}");
}
catch (Exception e)
{
_logger?.Error(e, "PCB transaction generation failed.");
}
}
private Transaction GetTxToVerifyBlockProducer(Address contractAccountHash, ECKeyPair keyPair,
string recipientAddress, Timestamp timestamp, long roundId)
{
if (contractAccountHash == null || keyPair == null || recipientAddress == null)
{
_logger?.Error("Something wrong happened to consensus verification filter.");
return(null);
}
var tx = new Transaction
{
From = keyPair.GetAddress(),
To = contractAccountHash,
IncrementId = 0,
MethodName = "Validation",
Sig = new Signature
{
P = ByteString.CopyFrom(keyPair.PublicKey.Q.GetEncoded())
},
Params = ByteString.CopyFrom(ParamsPacker.Pack(
new StringValue {
Value = recipientAddress.RemoveHexPrefix()
}.ToByteArray(),
timestamp.ToByteArray(),
new Int64Value {
Value = roundId
}))
};
var signer = new ECSigner();
var signature = signer.Sign(keyPair, tx.GetHash().DumpByteArray());
// Update the signature
tx.Sig.R = ByteString.CopyFrom(signature.R);
tx.Sig.S = ByteString.CopyFrom(signature.S);
return(tx);
}
private void SetBpConfig()
{
var producers = MinersConfig.Instance.Producers;
// Set the list of block producers
try
{
foreach (var bp in producers.Values)
{
byte[] key = ByteArrayHelpers.FromHexString(bp["address"]);
_bpAddresses.Add(key);
}
}
catch (Exception e)
{
_logger?.Error(e, "Error while reading mining info.");
}
_nodeKey = NetworkConfig.Instance.EcKeyPair;
// This nodes key
_isBp = _bpAddresses.Any(k => k.BytesEqual(_nodeKey.GetAddress().DumpByteArray()));
}