public SpentTransactionsStorage(string baseDirectory)
: base(baseDirectory, "SpentTransactions",
keyPairs =>
{
using (var stream = new MemoryStream())
{
foreach (var keyPair in keyPairs)
{
DataEncoder.EncodeUInt256(stream, keyPair.Key);
DataEncoder.EncodeSpentTx(stream, keyPair.Value);
}
return(stream.ToArray());
}
},
(blockHash, bytes) =>
{
using (var stream = new MemoryStream(bytes))
{
var keyPairs = ImmutableList.CreateBuilder <KeyValuePair <UInt256, SpentTx> >();
while (stream.Position < stream.Length)
{
var txHash = DataEncoder.DecodeUInt256(stream);
var spentTx = DataEncoder.DecodeSpentTx(stream);
keyPairs.Add(new KeyValuePair <UInt256, SpentTx>(txHash, spentTx));
}
return(keyPairs.ToImmutable());
}
})
{ }
public bool TryGetBlockSpentTxes(int blockIndex, out IImmutableList <SpentTx> spentTxes)
{
Api.JetSetCurrentIndex(this.jetSession, this.spentTxTableId, "IX_SpentBlockIndex");
Api.MakeKey(this.jetSession, this.spentTxTableId, blockIndex, MakeKeyGrbit.NewKey);
if (Api.TrySeek(this.jetSession, this.spentTxTableId, SeekGrbit.SeekEQ))
{
var spentTxesBytes = Api.RetrieveColumn(this.jetSession, this.spentTxTableId, this.spentDataColumnId);
using (var stream = new MemoryStream(spentTxesBytes))
using (var reader = new BinaryReader(stream))
{
spentTxes = ImmutableList.CreateRange(reader.ReadList(() => DataEncoder.DecodeSpentTx(stream)));
}
return(true);
}
else
{
spentTxes = null;
return(false);
}
}
