txscript: Remove unused calcWitnessSignatureHash
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1 changed files with 0 additions and 24 deletions
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@ -534,30 +534,6 @@ func calcWitnessSignatureHashRaw(scriptSig []byte, sigHashes *TxSigHashes,
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return chainhash.DoubleHashB(sigHash.Bytes()), nil
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}
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// calcWitnessSignatureHash computes the sighash digest of a transaction's
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// segwit input using the new, optimized digest calculation algorithm defined
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// in BIP0143: https://github.com/bitcoin/bips/blob/master/bip-0143.mediawiki.
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// This function makes use of pre-calculated sighash fragments stored within
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// the passed HashCache to eliminate duplicate hashing computations when
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// calculating the final digest, reducing the complexity from O(N^2) to O(N).
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// Additionally, signatures now cover the input value of the referenced unspent
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// output. This allows offline, or hardware wallets to compute the exact amount
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// being spent, in addition to the final transaction fee. In the case the
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// wallet if fed an invalid input amount, the real sighash will differ causing
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// the produced signature to be invalid.
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//
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// DEPRECATED: Use calcWitnessSignatureHashRaw instead.
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func calcWitnessSignatureHash(subScript []parsedOpcode, sigHashes *TxSigHashes,
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hashType SigHashType, tx *wire.MsgTx, idx int, amt int64) ([]byte, error) {
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script, err := unparseScript(subScript)
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if err != nil {
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return nil, err
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}
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return calcWitnessSignatureHashRaw(script, sigHashes, hashType, tx, idx, amt)
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}
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// CalcWitnessSigHash computes the sighash digest for the specified input of
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// the target transaction observing the desired sig hash type.
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func CalcWitnessSigHash(script []byte, sigHashes *TxSigHashes, hType SigHashType,
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