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Completely rewrote convertScriptSigAsm

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it now gives identical output to esplora, tested with the following TXs (testnet):

88710a9a6751827490f260e307757543f533c0f18bcd6865794713d263d5f5a4
446b2aad074de94efa28a1e82d2e6016dcb8a8ca38aca1a5a8eac6ef54e56a2e
4cfc410092e9514c14f48b61e20d2d3baf540ae7e981a821dd8c05dd4b7cd591
4b55dde38173174ab09e5571ebffffca798ba11143d28b9770600ff376dc778a
This commit is contained in:
Antoni Spaanderman 2022-04-03 21:41:12 +02:00
parent ba92284e44
commit dfb5ba5c36
No known key found for this signature in database
GPG Key ID: AE0B68E552E5DF8C
1 changed files with 54 additions and 31 deletions
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85
backend/src/api/bitcoin/bitcoin-api.ts
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@ -147,7 +147,7 @@ class BitcoinApi implements AbstractBitcoinApi {
scriptpubkey: vout.scriptPubKey.hex,
scriptpubkey_address: vout.scriptPubKey && vout.scriptPubKey.address ? vout.scriptPubKey.address
: vout.scriptPubKey.addresses ? vout.scriptPubKey.addresses[0] : '',
scriptpubkey_asm: vout.scriptPubKey.asm ? this.convertScriptSigAsm(vout.scriptPubKey.asm) : '',
scriptpubkey_asm: vout.scriptPubKey.asm ? this.convertScriptSigAsm(vout.scriptPubKey.hex) : '',
scriptpubkey_type: this.translateScriptPubKeyType(vout.scriptPubKey.type),
};
});
@ -157,7 +157,7 @@ class BitcoinApi implements AbstractBitcoinApi {
is_coinbase: !!vin.coinbase,
prevout: null,
scriptsig: vin.scriptSig && vin.scriptSig.hex || vin.coinbase || '',
scriptsig_asm: vin.scriptSig && this.convertScriptSigAsm(vin.scriptSig.asm) || '',
scriptsig_asm: vin.scriptSig && this.convertScriptSigAsm(vin.scriptSig.hex) || '',
sequence: vin.sequence,
txid: vin.txid || '',
vout: vin.vout || 0,
@ -290,38 +290,61 @@ class BitcoinApi implements AbstractBitcoinApi {
return transaction;
}
private convertScriptSigAsm(str: string): string {
const a = str.split(' ');
private convertScriptSigAsm(hex: string): string {
const buf = Buffer.from(hex, 'hex');
const b: string[] = [];
a.forEach((chunk) => {
if (chunk.substr(0, 3) === 'OP_') {
chunk = chunk.replace(/^OP_(\d+)$/, 'OP_PUSHNUM_$1');
chunk = chunk.replace('OP_CHECKSEQUENCEVERIFY', 'OP_CSV');
chunk = chunk.replace('OP_CHECKLOCKTIMEVERIFY', 'OP_CLTV');
b.push(chunk);
let i = 0;
while (i < buf.length) {
const op = buf[i];
if (op >= 0x01 && op <= 0x4e) {
i++;
let push: number;
if (op === 0x4c) {
push = buf.readUInt8(i);
b.push('OP_PUSHDATA1');
i += 1;
} else if (op === 0x4d) {
push = buf.readUInt16LE(i);
b.push('OP_PUSHDATA2');
i += 2;
} else if (op === 0x4e) {
push = buf.readUInt32LE(i);
b.push('OP_PUSHDATA4');
i += 4;
} else {
push = op;
b.push('OP_PUSHBYTES_' + push);
}
const data = buf.slice(i, i + push);
if (data.length !== push) {
break;
}
b.push(data.toString('hex'));
i += data.length;
} else {
chunk = chunk.replace('[ALL]', '01');
if (chunk === '0') {
b.push('OP_0');
} else if (chunk.match(/^[^0]\d*$/)) {
const chunkInt = parseInt(chunk, 10);
if (chunkInt < 0) {
b.push('OP_PUSHNUM_NEG' + -chunkInt);
const opcode = bitcoinjs.script.toASM([ op ]);
if (opcode && op < 0xfd) {
if (opcode === 'OP_1NEGATE') {
b.push('OP_PUSHNUM_NEG1');
} else if (/^OP_(\d+)$/.test(opcode) && opcode !== 'OP_0') {
b.push(opcode.replace(/^OP_(\d+)$/, 'OP_PUSHNUM_$1'));
} else {
b.push('OP_PUSHNUM_' + chunk);
b.push(opcode
.replace('OP_CHECKSEQUENCEVERIFY', 'OP_CSV')
.replace('OP_CHECKLOCKTIMEVERIFY', 'OP_CLTV')
);
}
} else {
const dataLength = Math.round(chunk.length / 2);
if (dataLength > 255) {
b.push('OP_PUSHDATA2' + ' ' + chunk);
} else if (dataLength > 75) {
b.push('OP_PUSHDATA1' + ' ' + chunk);
} else {
b.push('OP_PUSHBYTES_' + dataLength + ' ' + chunk);
}
b.push('OP_RETURN_' + op);
}
i += 1;
}
});
}
return b.join(' ');
}
@ -332,21 +355,21 @@ class BitcoinApi implements AbstractBitcoinApi {
if (vin.prevout.scriptpubkey_type === 'p2sh') {
const redeemScript = vin.scriptsig_asm.split(' ').reverse()[0];
vin.inner_redeemscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(redeemScript, 'hex')));
vin.inner_redeemscript_asm = this.convertScriptSigAsm(redeemScript);
if (vin.witness && vin.witness.length > 2) {
const witnessScript = vin.witness[vin.witness.length - 1];
vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
}
}
if (vin.prevout.scriptpubkey_type === 'v0_p2wsh' && vin.witness) {
const witnessScript = vin.witness[vin.witness.length - 1];
vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
}
if (vin.prevout.scriptpubkey_type === 'v1_p2tr' && vin.witness && vin.witness.length > 1) {
const witnessScript = vin.witness[vin.witness.length - 2];
vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
}
}