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Improve OP_RETURN decoding

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This commit is contained in:
Martin Boehm 2018-09-11 16:07:39 +02:00
parent 503ff4389a
commit 6d15e429c7
1 changed files with 17 additions and 3 deletions
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20
bchain/coins/btc/bitcoinparser.go
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@ -87,8 +87,22 @@ func (p *BitcoinParser) addressToOutputScript(address string) ([]byte, error) {
// TryParseOPReturn tries to process OP_RETURN script and return its string representation // TryParseOPReturn tries to process OP_RETURN script and return its string representation
func TryParseOPReturn(script []byte) string { func TryParseOPReturn(script []byte) string {
if len(script) > 1 && script[0] == txscript.OP_RETURN { if len(script) > 1 && script[0] == txscript.OP_RETURN {
l := int(script[1]) // trying 2 variants of OP_RETURN data
data := script[2:] // 1) OP_RETURN OP_PUSHDATA1 <datalen> <data>
// 2) OP_RETURN <datalen> <data>
var data []byte
var l int
if script[1] == txscript.OP_PUSHDATA1 && len(script) > 2 {
l = int(script[2])
data = script[3:]
if l != len(data) {
l = int(script[1])
data = script[2:]
}
} else {
l = int(script[1])
data = script[2:]
}
if l == len(data) { if l == len(data) {
isASCII := true isASCII := true
for _, c := range data { for _, c := range data {
@ -101,7 +115,7 @@ func TryParseOPReturn(script []byte) string {
if isASCII { if isASCII {
ed = "(" + string(data) + ")" ed = "(" + string(data) + ")"
} else { } else {
ed = hex.EncodeToString([]byte{byte(l)}) + " " + hex.EncodeToString(data) ed = hex.EncodeToString(data)
} }
return "OP_RETURN " + ed return "OP_RETURN " + ed
} }