public void BeginTransaction(
     out UncommittedRecord<ChainedHeader> chainTip,
     out UncommittedRecord<int> unspentTxCount,
     out UncommittedRecord<int> unspentOutputCount,
     out UncommittedRecord<int> totalTxCount,
     out UncommittedRecord<int> totalInputCount,
     out UncommittedRecord<int> totalOutputCount,
     out UncommittedRecord<ImmutableSortedDictionary<UInt256, ChainedHeader>.Builder> headers,
     out UncommittedRecord<ImmutableSortedDictionary<UInt256, UnspentTx>.Builder> unspentTransactions,
     out UncommittedRecord<ImmutableSortedDictionary<TxOutputKey, TxOutput>.Builder> unspentTxOutputs,
     out UncommittedRecord<ImmutableDictionary<int, BlockSpentTxes>.Builder> blockSpentTxes,
     out UncommittedRecord<ImmutableDictionary<UInt256, IImmutableList<UnmintedTx>>.Builder> blockUnmintedTxes)
 {
     lock (this.lockObject)
     {
         chainTip = this.chainTip.AsUncommitted();
         unspentTxCount = this.unspentTxCount.AsUncommitted();
         unspentOutputCount = this.unspentOutputCount.AsUncommitted();
         totalTxCount = this.totalTxCount.AsUncommitted();
         totalInputCount = this.totalInputCount.AsUncommitted();
         totalOutputCount = this.totalOutputCount.AsUncommitted();
         headers = this.headers.AsUncommitted(x => x.ToImmutable().ToBuilder());
         unspentTransactions = this.unspentTransactions.AsUncommitted(x => x.ToImmutable().ToBuilder());
         unspentTxOutputs = this.unspentTxOutputs.AsUncommitted(x => x.ToImmutable().ToBuilder());
         blockSpentTxes = this.blockSpentTxes.AsUncommitted(x => x.ToImmutable().ToBuilder());
         blockUnmintedTxes = this.blockUnmintedTxes.AsUncommitted(x => x.ToImmutable().ToBuilder());
     }
 }
 public void BeginTransaction(
     out UncommittedRecord<ChainedHeader> chainTip,
     out UncommittedRecord<int> unconfirmedTxCount,
     out UncommittedRecord<ImmutableDictionary<UInt256, UnconfirmedTx>.Builder> unconfirmedTxes,
     out UncommittedRecord<ImmutableDictionary<TxOutputKey, ImmutableDictionary<UInt256, UnconfirmedTx>.Builder>.Builder> unconfirmedTxesByPrevTxOutputKey)
 {
     lock (this.lockObject)
     {
         chainTip = this.chainTip.AsUncommitted();
         unconfirmedTxCount = this.unconfirmedTxCount.AsUncommitted();
         unconfirmedTxes = this.unconfirmedTxes.AsUncommitted(x => x.ToImmutable().ToBuilder());
         unconfirmedTxesByPrevTxOutputKey = this.unconfirmedTxesByPrevTxOutputKey.AsUncommitted(x => x.ToImmutable().ToBuilder());
     }
 }
        public void CommitTransaction(
            UncommittedRecord<ChainedHeader> chainTip,
            UncommittedRecord<int> unconfirmedTxCount,
            UncommittedRecord<ImmutableDictionary<UInt256, UnconfirmedTx>.Builder> unconfirmedTxes,
            UncommittedRecord<ImmutableDictionary<TxOutputKey, ImmutableDictionary<UInt256, UnconfirmedTx>.Builder>.Builder> unconfirmedTxesByPrevTxOutputKey)
        {
            lock (this.lockObject)
            {
                if (this.chainTip.ConflictsWith(chainTip)
                    || this.unconfirmedTxCount.ConflictsWith(unconfirmedTxCount)
                    || this.unconfirmedTxes.ConflictsWith(unconfirmedTxes)
                    || this.unconfirmedTxesByPrevTxOutputKey.ConflictsWith(unconfirmedTxesByPrevTxOutputKey))
                    throw new InvalidOperationException();

                this.chainTip.Committ(chainTip);
                this.unconfirmedTxCount.Committ(unconfirmedTxCount);
                this.unconfirmedTxes.Committ(unconfirmedTxes, x => x.ToImmutable().ToBuilder());
                this.unconfirmedTxesByPrevTxOutputKey.Committ(unconfirmedTxesByPrevTxOutputKey, x => x.ToImmutable().ToBuilder());
            }
        }
        public void CommitTransaction(
            UncommittedRecord<ChainedHeader> chainTip,
            UncommittedRecord<int> unspentTxCount,
            UncommittedRecord<int> unspentOutputCount,
            UncommittedRecord<int> totalTxCount,
            UncommittedRecord<int> totalInputCount,
            UncommittedRecord<int> totalOutputCount,
            UncommittedRecord<ImmutableSortedDictionary<UInt256, ChainedHeader>.Builder> headers,
            UncommittedRecord<ImmutableSortedDictionary<UInt256, UnspentTx>.Builder> unspentTransactions,
            UncommittedRecord<ImmutableSortedDictionary<TxOutputKey, TxOutput>.Builder> unspentTxOutputs,
            UncommittedRecord<ImmutableDictionary<int, BlockSpentTxes>.Builder> blockSpentTxes,
            UncommittedRecord<ImmutableDictionary<UInt256, IImmutableList<UnmintedTx>>.Builder> blockUnmintedTxes)
        {
            lock (this.lockObject)
            {
                if (this.chainTip.ConflictsWith(chainTip)
                    || this.unspentTxCount.ConflictsWith(unspentTxCount)
                    || this.unspentOutputCount.ConflictsWith(unspentOutputCount)
                    || this.totalTxCount.ConflictsWith(totalTxCount)
                    || this.totalInputCount.ConflictsWith(totalInputCount)
                    || this.totalOutputCount.ConflictsWith(totalOutputCount)
                    || this.headers.ConflictsWith(headers)
                    || this.unspentTransactions.ConflictsWith(unspentTransactions)
                    || this.unspentTxOutputs.ConflictsWith(unspentTxOutputs)
                    || this.blockSpentTxes.ConflictsWith(blockSpentTxes)
                    || this.blockUnmintedTxes.ConflictsWith(blockUnmintedTxes))
                    throw new InvalidOperationException();

                this.chainTip.Committ(chainTip);
                this.unspentTxCount.Committ(unspentTxCount);
                this.unspentOutputCount.Committ(unspentOutputCount);
                this.totalTxCount.Committ(totalTxCount);
                this.totalInputCount.Committ(totalInputCount);
                this.totalOutputCount.Committ(totalOutputCount);
                this.headers.Committ(headers, x => x.ToImmutable().ToBuilder());
                this.unspentTransactions.Committ(unspentTransactions, x => x.ToImmutable().ToBuilder());
                this.unspentTxOutputs.Committ(unspentTxOutputs, x => x.ToImmutable().ToBuilder());
                this.blockSpentTxes.Committ(blockSpentTxes, x => x.ToImmutable().ToBuilder());
                this.blockUnmintedTxes.Committ(blockUnmintedTxes, x => x.ToImmutable().ToBuilder());
            }
        }
        public void CommitTransaction()
        {
            if (!inTransaction)
                throw new InvalidOperationException();

            unconfirmedTxesStorage.CommitTransaction(
                chainTip,
                unconfirmedTxCount,
                unconfirmedTxes,
                unconfirmedTxesByPrevTxOutputKey);

            chainTip = null;
            unconfirmedTxCount = null;
            unconfirmedTxes = null;
            unconfirmedTxesByPrevTxOutputKey = null;

            inTransaction = false;

            if (!readOnly)
                unconfirmedTxesStorage.WriteTxLock.Release();
        }
        public bool TryRemoveTransaction(UInt256 txHash)
        {
            CheckWriteTransaction();

            UnconfirmedTx unconfirmedTx;
            if (unconfirmedTxes.Value.TryGetValue(txHash, out unconfirmedTx)
                && unconfirmedTxes.TryModify(x => x.Remove(txHash)))
            {
                // update index of txes spending each input's prev tx
                for (var inputIndex = 0; inputIndex < unconfirmedTx.Transaction.Inputs.Length; inputIndex++)
                {
                    var input = unconfirmedTx.Transaction.Inputs[inputIndex];

                    unconfirmedTxesByPrevTxOutputKey.Modify(_ => { });
                    ImmutableDictionary<UInt256, UnconfirmedTx>.Builder unconfirmedTxes;
                    if (unconfirmedTxesByPrevTxOutputKey.Value.TryGetValue(input.PrevTxOutputKey, out unconfirmedTxes))
                        // ensure a copy of the builder is modified or underlying storage will see uncomitted state
                        unconfirmedTxes = unconfirmedTxes.ToImmutable().ToBuilder();
                    else
                        unconfirmedTxes = ImmutableDictionary.CreateBuilder<UInt256, UnconfirmedTx>();

                    unconfirmedTxes.Remove(unconfirmedTx.Hash);
                    if (unconfirmedTxes.Count > 0)
                        unconfirmedTxesByPrevTxOutputKey.Value[input.PrevTxOutputKey] = unconfirmedTxes;
                    else
                        unconfirmedTxesByPrevTxOutputKey.Value.Remove(input.PrevTxOutputKey);
                }

                return true;
            }
            else
                return false;
        }
        public bool TryAddTransaction(UnconfirmedTx unconfirmedTx)
        {
            CheckWriteTransaction();

            try
            {
                unconfirmedTxes.Modify(x => x.Add(unconfirmedTx.Hash, unconfirmedTx));

                // update index of txes spending each input's prev tx
                for (var inputIndex = 0; inputIndex < unconfirmedTx.Transaction.Inputs.Length; inputIndex++)
                {
                    var input = unconfirmedTx.Transaction.Inputs[inputIndex];

                    unconfirmedTxesByPrevTxOutputKey.Modify(_ => { });
                    ImmutableDictionary<UInt256, UnconfirmedTx>.Builder unconfirmedTxes;
                    if (unconfirmedTxesByPrevTxOutputKey.Value.TryGetValue(input.PrevTxOutputKey, out unconfirmedTxes))
                        // ensure a copy of the builder is modified or underlying storage will see uncomitted state
                        unconfirmedTxes = unconfirmedTxes.ToImmutable().ToBuilder();
                    else
                        unconfirmedTxes = ImmutableDictionary.CreateBuilder<UInt256, UnconfirmedTx>();

                    unconfirmedTxes.Add(unconfirmedTx.Hash, unconfirmedTx);
                    unconfirmedTxesByPrevTxOutputKey.Value[input.PrevTxOutputKey] = unconfirmedTxes;
                }

                return true;
            }
            catch (ArgumentException)
            {
                return false;
            }
        }
        public void CommitTransaction()
        {
            if (!inTransaction)
                throw new InvalidOperationException();

            chainStateStorage.CommitTransaction(
                chainTip,
                unspentTxCount,
                unspentOutputCount,
                totalTxCount,
                totalInputCount,
                totalOutputCount,
                headers,
                unspentTransactions,
                unspentTxOutputs,
                blockSpentTxes,
                blockUnmintedTxes);

            chainTip = null;

            unspentTxCount = null;
            unspentOutputCount = null;
            totalTxCount = null;
            totalInputCount = null;
            totalOutputCount = null;
            headers = null;
            unspentTransactions = null;
            unspentTxOutputs = null;
            blockSpentTxes = null;
            blockUnmintedTxes = null;

            inTransaction = false;

            if (!readOnly)
                chainStateStorage.WriteTxLock.Release();
        }