BitSharp.Core.Rules.CoreRules.TallyTransaction C# (CSharp) Méthode

        public void TallyTransaction(Chain newChain, ValidatableTx validatableTx, ref object runningTally)
        {
            var chainedHeader = newChain.LastBlock;

            if (runningTally == null)
            {
                var medianPrevHeaderTime = GetMedianPrevHeaderTime(newChain, chainedHeader.Height);

                var lockTimeFlags = 0; // TODO why is this used here?
                var lockTimeCutoff = ((lockTimeFlags & LOCKTIME_MEDIAN_TIME_PAST) != 0)
                                      ? GetMedianPrevHeaderTime(newChain, chainedHeader.Height).ToUnixTimeSeconds()
                                      : chainedHeader.Time.ToUnixTimeSeconds();

                runningTally = new BlockTally { BlockSize = 80, LockTimeCutoff = lockTimeCutoff };
            }

            var blockTally = (BlockTally)runningTally;

            var tx = validatableTx.Transaction;
            var txIndex = validatableTx.Index;

            // BIP16 didn't become active until Apr 1 2012
            var nBIP16SwitchTime = DateTimeOffset.FromUnixTimeSeconds(1333238400U);
            var strictPayToScriptHash = chainedHeader.Time >= nBIP16SwitchTime;

            // first transaction must be coinbase
            if (validatableTx.Index == 0 && !tx.IsCoinbase)
                throw new ValidationException(chainedHeader.Hash);
            // all other transactions must not be coinbase
            else if (validatableTx.Index > 0 && tx.IsCoinbase)
                throw new ValidationException(chainedHeader.Hash);
            // must have inputs
            else if (tx.Inputs.Length == 0)
                throw new ValidationException(chainedHeader.Hash);
            // must have outputs
            else if (tx.Outputs.Length == 0)
                throw new ValidationException(chainedHeader.Hash);
            // coinbase scriptSignature length must be >= 2 && <= 100
            else if (tx.IsCoinbase && (tx.Inputs[0].ScriptSignature.Length < 2 || tx.Inputs[0].ScriptSignature.Length > 100))
                throw new ValidationException(chainedHeader.Hash);
            // all transactions must be finalized
            else if (!IsFinal(tx, chainedHeader.Height, blockTally.LockTimeCutoff))
                throw new ValidationException(chainedHeader.Hash);

            // Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
            // if 750 of the last 1,000 blocks are version 2 or greater (51/100 if testnet):
            if (tx.IsCoinbase
                && chainedHeader.Version >= 2
                && IsSuperMajority(2, newChain, ChainParams.MajorityEnforceBlockUpgrade))
            {
                var requiredScript = GetPushInt64Script(chainedHeader.Height);
                var actualScript = tx.Inputs[0].ScriptSignature;

                if (actualScript.Length < requiredScript.Length
                    || !actualScript.Take(requiredScript.Length).SequenceEqual(requiredScript))
                {
                    throw new ValidationException(chainedHeader.Hash);
                }
            }

            // running input/output value tallies
            var txTotalInputValue = 0UL;
            var txTotalOutputValue = 0UL;
            var txSigOpCount = 0;

            // validate & tally inputs
            for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++)
            {
                var input = tx.Inputs[inputIndex];

                if (!tx.IsCoinbase)
                {
                    var prevOutput = validatableTx.PrevTxOutputs[inputIndex];

                    // if spending a coinbase, it must be mature
                    if (prevOutput.IsCoinbase
                        && chainedHeader.Height - prevOutput.BlockHeight < COINBASE_MATURITY)
                    {
                        throw new ValidationException(chainedHeader.Hash);
                    }

                    // non-coinbase txes must not have coinbase prev tx output key (txHash: 0, outputIndex: -1)
                    if (input.PrevTxOutputKey.TxOutputIndex == uint.MaxValue && input.PrevTxOutputKey.TxHash == UInt256.Zero)
                        throw new ValidationException(chainedHeader.Hash);

                    // tally
                    txTotalInputValue += prevOutput.Value;
                }

                // tally
                txSigOpCount += CountLegacySigOps(input.ScriptSignature, accurate: false);
                if (!tx.IsCoinbase && strictPayToScriptHash)
                    txSigOpCount += CountP2SHSigOps(validatableTx, inputIndex);
            }

            // validate & tally outputs
            for (var outputIndex = 0; outputIndex < tx.Outputs.Length; outputIndex++)
            {
                var output = tx.Outputs[outputIndex];

                // must not have any negative money value outputs
                if (unchecked((long)output.Value) < 0)
                    throw new ValidationException(chainedHeader.Hash);
                // must not have any outputs with a value greater than max money
                else if (output.Value > MAX_MONEY)
                    throw new ValidationException(chainedHeader.Hash);

                // tally
                if (!tx.IsCoinbase)
                    txTotalOutputValue += output.Value;
                txSigOpCount += CountLegacySigOps(output.ScriptPublicKey, accurate: false);
            }

            // must not have a total output value greater than max money
            if (txTotalOutputValue > MAX_MONEY)
                throw new ValidationException(chainedHeader.Hash);

            // validate non-coinbase fees
            long txFeeValue;
            if (!validatableTx.IsCoinbase)
            {
                // ensure that output amount isn't greater than input amount
                if (txTotalOutputValue > txTotalInputValue)
                    throw new ValidationException(chainedHeader.Hash, $"Failing tx {tx.Hash}: Transaction output value is greater than input value");

                // calculate fee value (unspent amount)
                txFeeValue = (long)txTotalInputValue - (long)txTotalOutputValue;
                Debug.Assert(txFeeValue >= 0);
            }
            else
                txFeeValue = 0;


            // block tallies
            if (validatableTx.IsCoinbase)
                blockTally.CoinbaseTx = validatableTx;
            blockTally.TxCount++;
            blockTally.TotalFees += txFeeValue;
            blockTally.TotalSigOpCount += txSigOpCount;
            // re-encode transaction for block size calculation so it is optimal length
            blockTally.BlockSize +=
                DataEncoder.EncodeTransaction(validatableTx.Transaction).TxBytes.Length;

            //TODO
            if (blockTally.TotalSigOpCount > MAX_BLOCK_SIGOPS)
                throw new ValidationException(chainedHeader.Hash);
            //TODO
            else if (blockTally.BlockSize + DataEncoder.VarIntSize((uint)blockTally.TxCount) > MAX_BLOCK_SIZE)
                throw new ValidationException(chainedHeader.Hash);

            // all validation has passed
        }