/// <summary>
/// Broadcasts a signed transaction to the Decred network
/// </summary>
/// <param name="operationId"></param>
/// <param name="hexTransaction"></param>
/// <returns></returns>
/// <exception cref="TransactionBroadcastException"></exception>
public async Task Broadcast(Guid operationId, string hexTransaction)
{
if (operationId == Guid.Empty)
{
throw new BusinessException(ErrorReason.BadRequest, "Operation id is invalid");
}
if (string.IsNullOrWhiteSpace(hexTransaction))
{
throw new BusinessException(ErrorReason.BadRequest, "SignedTransaction is invalid");
}
var txBytes = HexUtil.ToByteArray(hexTransaction);
var msgTx = new MsgTx();
msgTx.Decode(txBytes);
// If the operation exists in the cache, throw exception
var cachedResult = await _broadcastTxRepo.GetAsync(operationId.ToString());
if (cachedResult != null)
{
throw new BusinessException(ErrorReason.DuplicateRecord, "Operation already broadcast");
}
var txHash = HexUtil.FromByteArray(msgTx.GetHash().Reverse().ToArray());
var txWasMined = await _txRepo.GetTxInfoByHash(txHash, long.MaxValue) != null;
if (txWasMined)
{
await SaveBroadcastedTransaction(new BroadcastedTransaction
{
OperationId = operationId,
Hash = txHash,
EncodedTransaction = hexTransaction
});
throw new BusinessException(ErrorReason.DuplicateRecord, "Operation already broadcast");
}
// Submit the transaction to the network via dcrd
var result = await _dcrdClient.SendRawTransactionAsync(hexTransaction);
if (result.Error != null)
{
throw new TransactionBroadcastException($"[{result.Error.Code}] {result.Error.Message}");
}
await SaveBroadcastedTransaction(new BroadcastedTransaction
{
OperationId = operationId,
Hash = txHash,
EncodedTransaction = hexTransaction
});
}
