/// <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.");
}
}
