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txscript: Optimize typeOfScript pay-to-script-hash.

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This begins the process of converting the typeOfScript function to use a
combination of raw script analysis and the new tokenizer instead of the
far less efficient parsed opcodes with the intent of significantly
optimizing the function.

In order to ease the review process, each script type will be converted
in a separate commit and the typeOfScript function will be updated such
that the script is only parsed as a fallback for the cases that are not
already converted to more efficient raw script variants.

In particular, for this commit, since the ability to detect
pay-to-script-hash via raw script analysis is now available, the
function is simply updated to make use of it.
This commit is contained in:
Dave Collins 2019-03-13 01:11:34 -05:00 committed by Roy Lee
parent 9ac8abd519
commit 603c2e3b2b
1 changed files with 5 additions and 2 deletions
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7
txscript/standard.go
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@ -506,6 +506,11 @@ func typeOfScript(scriptVersion uint16, script []byte) ScriptClass {
return NonStandardTy
}
switch {
case isScriptHashScript(script):
return ScriptHashTy
}
pops, err := parseScript(script)
if err != nil {
return NonStandardTy
@ -517,8 +522,6 @@ func typeOfScript(scriptVersion uint16, script []byte) ScriptClass {
return PubKeyHashTy
} else if isWitnessPubKeyHash(pops) {
return WitnessV0PubKeyHashTy
} else if isScriptHash(pops) {
return ScriptHashTy
} else if isWitnessScriptHash(pops) {
return WitnessV0ScriptHashTy
} else if isMultiSig(pops) {