public BlockTxNode ReadNode()
{
var blockIndexColumn = new Int32ColumnValue {
Columnid = cursor.blockIndexColumnId
};
var txIndexColumn = new Int32ColumnValue {
Columnid = cursor.txIndexColumnId
};
var depthColumn = new Int32ColumnValue {
Columnid = cursor.blockDepthColumnId
};
var txHashColumn = new BytesColumnValue {
Columnid = cursor.blockTxHashColumnId
};
Api.RetrieveColumns(cursor.jetSession, cursor.blocksTableId, blockIndexColumn, txIndexColumn, depthColumn, txHashColumn);
if (this.blockIndex != blockIndexColumn.Value.Value)
{
throw new InvalidOperationException();
}
var txIndex = txIndexColumn.Value.Value;
var depth = depthColumn.Value.Value;
var txHash = DbEncoder.DecodeUInt256(txHashColumn.Value);
var pruned = depth >= 0;
depth = Math.Max(0, depth);
return(new BlockTxNode(txIndex, depth, txHash, pruned, encodedTx: null));
}
private IEnumerable <BlockTx> ReadBlockTransactions(UInt256 blockHash, int blockId)
{
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
var sha256 = new SHA256Managed();
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIdTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockId, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, -1, MakeKeyGrbit.None);
if (!Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekGE))
{
yield break;
}
do
{
if (blockId != Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockIdColumnId).Value)
{
yield break;
}
var txIndex = Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockTxIndexColumnId).Value;
var depth = Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockDepthColumnId).Value;
var txHash = DbEncoder.DecodeUInt256(Api.RetrieveColumn(cursor.jetSession, cursor.blocksTableId, cursor.blockTxHashColumnId));
var txBytes = Api.RetrieveColumn(cursor.jetSession, cursor.blocksTableId, cursor.blockTxBytesColumnId);
// determine if transaction is pruned by its depth
var pruned = depth >= 0;
depth = Math.Max(0, depth);
Transaction tx;
if (!pruned)
{
// verify transaction is not corrupt
if (txHash != new UInt256(sha256.ComputeDoubleHash(txBytes)))
{
throw new MissingDataException(blockHash);
}
tx = DataEncoder.DecodeTransaction(txBytes);
}
else
{
tx = null;
}
var blockTx = new BlockTx(txIndex, depth, txHash, pruned, tx);
yield return(blockTx);
} while (Api.TryMoveNext(cursor.jetSession, cursor.blocksTableId));
}
}
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
int blockIndex;
if (!TryGetBlockIndex(cursor, blockHash, out blockIndex))
{
transaction = null;
return(false);
}
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIndexTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, txIndex, MakeKeyGrbit.None);
if (Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekEQ))
{
var blockTxHashColumn = new BytesColumnValue {
Columnid = cursor.blockTxHashColumnId
};
var blockTxBytesColumn = new BytesColumnValue {
Columnid = cursor.blockTxBytesColumnId
};
Api.RetrieveColumns(cursor.jetSession, cursor.blocksTableId, blockTxHashColumn, blockTxBytesColumn);
if (blockTxBytesColumn.Value != null)
{
var txHash = DbEncoder.DecodeUInt256(blockTxHashColumn.Value);
transaction = new BlockTx(txIndex, txHash, blockTxBytesColumn.Value.ToImmutableArray());
return(true);
}
else
{
transaction = null;
return(false);
}
}
else
{
transaction = null;
return(false);
}
}
}
}
public IEnumerable <UnspentTx> ReadUnspentTransactions()
{
Api.JetSetCurrentIndex(this.jetSession, this.unspentTxTableId, "IX_TxHash");
if (Api.TryMoveFirst(this.jetSession, this.unspentTxTableId))
{
do
{
var txHash = DbEncoder.DecodeUInt256(Api.RetrieveColumn(this.jetSession, this.unspentTxTableId, this.txHashColumnId));
var blockIndex = Api.RetrieveColumnAsInt32(this.jetSession, this.unspentTxTableId, this.blockIndexColumnId).Value;
var txIndex = Api.RetrieveColumnAsInt32(this.jetSession, this.unspentTxTableId, this.txIndexColumnId).Value;
var outputStates = DataEncoder.DecodeOutputStates(Api.RetrieveColumn(this.jetSession, this.unspentTxTableId, this.outputStatesColumnId));
yield return(new UnspentTx(txHash, blockIndex, txIndex, outputStates));
} while (Api.TryMoveNext(this.jetSession, this.unspentTxTableId));
}
}
public MerkleTreeNode ReadNode()
{
if (this.blockId != Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockIdColumnId).Value)
{
throw new InvalidOperationException();
}
var index = Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockTxIndexColumnId).Value;
var depth = Api.RetrieveColumnAsInt32(cursor.jetSession, cursor.blocksTableId, cursor.blockDepthColumnId).Value;
var txHash = DbEncoder.DecodeUInt256(Api.RetrieveColumn(cursor.jetSession, cursor.blocksTableId, cursor.blockTxHashColumnId));
var pruned = depth >= 0;
depth = Math.Max(0, depth);
return(new MerkleTreeNode(index, depth, txHash, pruned));
}
private IEnumerable <UnspentTx> ReadUnspentTransactionsInner()
{
using (SetSessionContext())
{
Api.JetSetCurrentIndex(this.jetSession, this.unspentTxTableId, "IX_TxHash");
if (Api.TryMoveFirst(this.jetSession, this.unspentTxTableId))
{
do
{
var txHashColumn = new BytesColumnValue {
Columnid = this.txHashColumnId
};
var blockIndexColumn = new Int32ColumnValue {
Columnid = this.blockIndexColumnId
};
var txIndexColumn = new Int32ColumnValue {
Columnid = this.txIndexColumnId
};
var txVersionColumn = new UInt32ColumnValue {
Columnid = this.txVersionColumnId
};
var isCoinbaseColumn = new BoolColumnValue {
Columnid = this.isCoinbaseColumnId
};
var outputStatesColumn = new BytesColumnValue {
Columnid = this.outputStatesColumnId
};
var txOutputBytesColumn = new BytesColumnValue {
Columnid = this.txOutputBytesColumnId
};
Api.RetrieveColumns(this.jetSession, this.unspentTxTableId, txHashColumn, blockIndexColumn, txIndexColumn, txVersionColumn, isCoinbaseColumn, outputStatesColumn, txOutputBytesColumn);
var txHash = DbEncoder.DecodeUInt256(txHashColumn.Value);
var blockIndex = blockIndexColumn.Value.Value;
var txIndex = txIndexColumn.Value.Value;
var txVersion = txVersionColumn.Value.Value;
var isCoinbase = isCoinbaseColumn.Value.Value;
var outputStates = DataDecoder.DecodeOutputStates(outputStatesColumn.Value);
yield return(new UnspentTx(txHash, blockIndex, txIndex, txVersion, isCoinbase, outputStates));
}while (Api.TryMoveNext(this.jetSession, this.unspentTxTableId));
}
}
}
private IEnumerator <BlockTxNode> ReadBlockTransactions(UInt256 blockHash, bool requireTx)
{
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
int blockIndex;
if (!TryGetBlockIndex(cursor, blockHash, out blockIndex))
{
throw new MissingDataException(blockHash);
}
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIndexTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, 0, MakeKeyGrbit.None);
if (!Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekGE))
{
throw new MissingDataException(blockHash);
}
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, int.MaxValue, MakeKeyGrbit.None);
if (!Api.TrySetIndexRange(cursor.jetSession, cursor.blocksTableId, SetIndexRangeGrbit.RangeUpperLimit))
{
throw new MissingDataException(blockHash);
}
do
{
var txIndexColumn = new Int32ColumnValue {
Columnid = cursor.txIndexColumnId
};
var blockDepthColumn = new Int32ColumnValue {
Columnid = cursor.blockDepthColumnId
};
var blockTxHashColumn = new BytesColumnValue {
Columnid = cursor.blockTxHashColumnId
};
var blockTxBytesColumn = new BytesColumnValue {
Columnid = cursor.blockTxBytesColumnId
};
Api.RetrieveColumns(cursor.jetSession, cursor.blocksTableId, txIndexColumn, blockDepthColumn, blockTxHashColumn, blockTxBytesColumn);
var txIndex = txIndexColumn.Value.Value;
var depth = blockDepthColumn.Value.Value;
var txHash = DbEncoder.DecodeUInt256(blockTxHashColumn.Value);
var txBytes = blockTxBytesColumn.Value;
// determine if transaction is pruned by its depth
var pruned = depth >= 0;
depth = Math.Max(0, depth);
if (pruned && requireTx)
{
throw new MissingDataException(blockHash);
}
var blockTxNode = new BlockTxNode(txIndex, depth, txHash, pruned, txBytes?.ToImmutableArray());
yield return(blockTxNode);
}while (Api.TryMoveNext(cursor.jetSession, cursor.blocksTableId));
}
}
}