Function calcHashInputScripts

txscript/hashcache.go:170–179

calcHashInputAmts computes the hash digest of all the previous input scripts referenced by the passed transaction. This hash pre computation is only used for validating taproot inputs.

(tx *wire.MsgTx, inputFetcher PrevOutputFetcher)

// referenced by the passed transaction. This hash pre computation is only used
// for validating taproot inputs.
func calcHashInputScripts(tx *wire.MsgTx, inputFetcher PrevOutputFetcher) chainhash.Hash {
	var b bytes.Buffer
	for _, txIn := range tx.TxIn {
		prevOut := inputFetcher.FetchPrevOutput(txIn.PreviousOutPoint)

		_ = wire.WriteVarBytes(&b, 0, prevOut.PkScript)
	}

	return chainhash.HashH(b.Bytes())
}

// SegwitSigHashMidstate is the sighash midstate used in the base segwit
// sighash calculation as defined in BIP 143.