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mempool: add CheckSpend method

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This commit adds a new method CheckSpend to the mempool, which takes an
outpoint and returns any transaction in the mempool that spends this
outpoint.
This commit is contained in:
Johan T. Halseth 2018-03-23 15:11:20 +01:00 committed by Olaoluwa Osuntokun
parent ceb1caeb24
commit 5394ca1afe
1 changed files with 11 additions and 0 deletions
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11
mempool/mempool.go
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@ -571,6 +571,17 @@ func (mp *TxPool) checkPoolDoubleSpend(tx *btcutil.Tx) error {
return nil return nil
} }
// CheckSpends checks whether the passed outpoint is already spent by a
// transaction in the mempool. If that's the case the spending transaction will
// be returned, if not nil will be returned.
func (mp *TxPool) CheckSpend(op wire.OutPoint) *btcutil.Tx {
mp.mtx.RLock()
txR := mp.outpoints[op]
mp.mtx.RUnlock()
return txR
}
// fetchInputUtxos loads utxo details about the input transactions referenced by // fetchInputUtxos loads utxo details about the input transactions referenced by
// the passed transaction. First, it loads the details form the viewpoint of // the passed transaction. First, it loads the details form the viewpoint of
// the main chain, then it adjusts them based upon the contents of the // the main chain, then it adjusts them based upon the contents of the