private static TransformManyBlock<BlockTx, Tuple<UInt256, CompletionCount, BlockTx>> InitQueueUnspentTxLookup(CancellationToken cancelToken)
{
return new TransformManyBlock<BlockTx, Tuple<UInt256, CompletionCount, BlockTx>>(
blockTx =>
{
var inputCount = !blockTx.IsCoinbase ? blockTx.Transaction.Inputs.Length : 0;
var completionCount = new CompletionCount(inputCount + 1);
var txHashes = new Tuple<UInt256, CompletionCount, BlockTx>[inputCount + 1];
txHashes[0] = Tuple.Create(blockTx.Hash, completionCount, blockTx);
if (!blockTx.IsCoinbase)
{
for (var inputIndex = 0; inputIndex < blockTx.Transaction.Inputs.Length; inputIndex++)
{
var txHash = blockTx.Transaction.Inputs[inputIndex].PreviousTxOutputKey.TxHash;
txHashes[inputIndex + 1] = Tuple.Create(txHash, completionCount, blockTx);
}
}
return txHashes;
},
new ExecutionDataflowBlockOptions { CancellationToken = cancelToken });
}
private static TransformManyBlock<DecodedBlockTx, Tuple<TxOutputKey, CompletionCount, DecodedBlockTx>> InitQueueUnspentTxLookup(CancellationToken cancelToken)
{
return new TransformManyBlock<DecodedBlockTx, Tuple<TxOutputKey, CompletionCount, DecodedBlockTx>>(
blockTx =>
{
var tx = blockTx.Transaction;
var outputCount = tx.Outputs.Length;
var inputCount = !blockTx.IsCoinbase ? tx.Inputs.Length * 2 : 0;
var txOutputKeys = new Tuple<TxOutputKey, CompletionCount, DecodedBlockTx>[1 + outputCount + inputCount];
var completionCount = new CompletionCount(txOutputKeys.Length);
var keyIndex = 0;
// warm-up the UnspentTx entry that will be added for the new tx
txOutputKeys[keyIndex++] = Tuple.Create(new TxOutputKey(blockTx.Hash, uint.MaxValue), completionCount, blockTx);
// warm-up the TxOutput entries that will be added for each of the tx's outputs
for (var outputIndex = 0; outputIndex < tx.Outputs.Length; outputIndex++)
{
var txOutputKey = new TxOutputKey(blockTx.Hash, (uint)outputIndex);
txOutputKeys[keyIndex++] = Tuple.Create(txOutputKey, completionCount, blockTx);
}
// warm-up the previous UnspentTx and TxOutput entries that will be needed for each of the tx's inputs
if (!blockTx.IsCoinbase)
{
for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++)
{
var input = tx.Inputs[inputIndex];
// input's previous tx's UnspentTx entry
var txOutputKey = new TxOutputKey(input.PrevTxHash, uint.MaxValue);
txOutputKeys[keyIndex++] = Tuple.Create(txOutputKey, completionCount, blockTx);
// input's previous tx outputs's TxOutput entry
txOutputKey = input.PrevTxOutputKey;
txOutputKeys[keyIndex++] = Tuple.Create(txOutputKey, completionCount, blockTx);
}
}
Debug.Assert(txOutputKeys.All(x => x != null));
return txOutputKeys;
},
new ExecutionDataflowBlockOptions { CancellationToken = cancelToken });
}
