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txscript: Remove GetScriptHashFromP2SHScript.

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This removes the deprecated GetScriptHashFromP2SHScript function.
This commit is contained in:
Dave Collins 2019-06-18 23:50:53 -05:00
parent 4f7a4c9858
commit 641be388b4
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1 changed files with 0 additions and 36 deletions
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36
txscript/standard.go
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@ -773,42 +773,6 @@ func payToScriptHashScript(scriptHash []byte) ([]byte, error) {
AddOp(OP_EQUAL).Script()
}
// GetScriptHashFromP2SHScript extracts the script hash from a valid
// pay-to-script-hash pkScript. The script is expected to already have been
// checked to be a pay-to-script-hash script prior to calling this function.
// The results are undefined for other script types.
//
// NOTE: This function is only valid for version 0 scripts. Since the function
// does not accept a script version, the results are undefined for other script
// versions.
//
// DEPRECATED. This will be removed in the next major version bump.
func GetScriptHashFromP2SHScript(pkScript []byte) ([]byte, error) {
// Scan through the opcodes until the first HASH160 opcode is found.
const scriptVersion = 0
tokenizer := MakeScriptTokenizer(scriptVersion, pkScript)
for tokenizer.Next() {
if tokenizer.Opcode() == OP_HASH160 {
break
}
}
// Attempt to extract the script hash if the script is not already fully
// parsed and didn't already fail during parsing above.
//
// Note that this means a script without a data push for the script hash or
// where OP_HASH160 wasn't found will result in nil data being returned.
// This was done to preserve existing behavior, although it is questionable
// since a p2sh script has a specific form and if there is no push here,
// it's not really a p2sh script and thus should probably have returned an
// appropriate error for calling the function incorrectly.
if tokenizer.Next() {
return tokenizer.Data(), nil
}
return nil, tokenizer.Err()
}
// PayToScriptHashScript is the exported version of payToScriptHashScript.
func PayToScriptHashScript(scriptHash []byte) ([]byte, error) {
return payToScriptHashScript(scriptHash)