public bool TryAddUnspentTxOutput(TxOutputKey txOutputKey, TxOutput txOutput)
{
CheckWriteTransaction();
using (SetSessionContext())
{
try
{
using (var jetUpdate = this.jetSession.BeginUpdate(this.unspentTxOutputTableId, JET_prep.Insert))
{
Api.SetColumns(this.jetSession, this.unspentTxOutputTableId,
new BytesColumnValue {
Columnid = this.txOutputKeyColumnId, Value = DbEncoder.EncodeTxOutputKey(txOutputKey)
},
new BytesColumnValue {
Columnid = this.txOutputBytesColumnId, Value = DataEncoder.EncodeTxOutput(txOutput)
});
jetUpdate.Save();
}
return(true);
}
catch (EsentKeyDuplicateException)
{
return(false);
}
}
}
public bool ContainsUnspentTxOutput(TxOutputKey txOutputKey)
{
CheckTransaction();
using (SetSessionContext())
{
Api.JetSetCurrentIndex(this.jetSession, this.unspentTxOutputTableId, "IX_TxOutputKey");
Api.MakeKey(this.jetSession, this.unspentTxOutputTableId, DbEncoder.EncodeTxOutputKey(txOutputKey), MakeKeyGrbit.NewKey);
return(Api.TrySeek(this.jetSession, this.unspentTxOutputTableId, SeekGrbit.SeekEQ));
}
}
public bool TryRemoveUnspentTxOutput(TxOutputKey txOutputKey)
{
CheckWriteTransaction();
using (SetSessionContext())
{
Api.JetSetCurrentIndex(this.jetSession, this.unspentTxOutputTableId, "IX_TxOutputKey");
Api.MakeKey(this.jetSession, this.unspentTxOutputTableId, DbEncoder.EncodeTxOutputKey(txOutputKey), MakeKeyGrbit.NewKey);
if (Api.TrySeek(this.jetSession, this.unspentTxOutputTableId, SeekGrbit.SeekEQ))
{
Api.JetDelete(this.jetSession, this.unspentTxOutputTableId);
return(true);
}
else
{
return(false);
}
}
}
public bool TryGetUnspentTxOutput(TxOutputKey txOutputKey, out TxOutput txOutput)
{
CheckTransaction();
using (SetSessionContext())
{
Api.JetSetCurrentIndex(this.jetSession, this.unspentTxOutputTableId, "IX_TxOutputKey");
Api.MakeKey(this.jetSession, this.unspentTxOutputTableId, DbEncoder.EncodeTxOutputKey(txOutputKey), MakeKeyGrbit.NewKey);
if (Api.TrySeek(this.jetSession, this.unspentTxOutputTableId, SeekGrbit.SeekEQ))
{
var txOutputBytesColumn = new BytesColumnValue {
Columnid = this.txOutputBytesColumnId
};
Api.RetrieveColumns(this.jetSession, this.unspentTxOutputTableId, txOutputBytesColumn);
txOutput = DataDecoder.DecodeTxOutput(txOutputBytesColumn.Value);
return(true);
}
txOutput = default(TxOutput);
return(false);
}
}
