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txscript: Remove unused isPushOnly function.

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This commit is contained in:
Dave Collins 2019-03-13 01:12:10 -05:00 committed by Roy Lee
parent ded9b8c506
commit e9a777d84e
1 changed files with 1 additions and 25 deletions
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26
txscript/script.go
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@ -161,26 +161,6 @@ func ExtractWitnessProgramInfo(script []byte) (int, []byte, error) {
return witnessVersion, witnessProgram, nil return witnessVersion, witnessProgram, nil
} }
// isPushOnly returns true if the script only pushes data, false otherwise.
//
// DEPRECATED. Use IsPushOnlyScript instead.
func isPushOnly(pops []parsedOpcode) bool {
// NOTE: This function does NOT verify opcodes directly since it is
// internal and is only called with parsed opcodes for scripts that did
// not have any parse errors. Thus, consensus is properly maintained.
for _, pop := range pops {
// All opcodes up to OP_16 are data push instructions.
// NOTE: This does consider OP_RESERVED to be a data push
// instruction, but execution of OP_RESERVED will fail anyways
// and matches the behavior required by consensus.
if pop.opcode.value > OP_16 {
return false
}
}
return true
}
// IsPushOnlyScript returns whether or not the passed script only pushes data // IsPushOnlyScript returns whether or not the passed script only pushes data
// according to the consensus definition of pushing data. // according to the consensus definition of pushing data.
// //
@ -901,11 +881,7 @@ func GetWitnessSigOpCount(sigScript, pkScript []byte, witness wire.TxWitness) in
// Next, we'll check the sigScript to see if this is a nested p2sh // Next, we'll check the sigScript to see if this is a nested p2sh
// witness program. This is a case wherein the sigScript is actually a // witness program. This is a case wherein the sigScript is actually a
// datapush of a p2wsh witness program. // datapush of a p2wsh witness program.
sigPops, err := parseScript(sigScript) if IsPayToScriptHash(pkScript) && IsPushOnlyScript(sigScript) &&
if err != nil {
return 0
}
if IsPayToScriptHash(pkScript) && isPushOnly(sigPops) &&
IsWitnessProgram(sigScript[1:]) { IsWitnessProgram(sigScript[1:]) {
return getWitnessSigOps(sigScript[1:], witness) return getWitnessSigOps(sigScript[1:], witness)
} }