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Текущая директория: /opt/BitGoJS/modules/utxo-lib/dist/test/bitgo
Просмотр файла: signatureModify.js
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTransactionWithHighS = getTransactionWithHighS;
exports.getPrevOutsWithInvalidOutputScript = getPrevOutsWithInvalidOutputScript;
/* eslint-disable no-redeclare */
const bitcoinjs_lib_1 = require("bitcoinjs-lib");
const bitgo_1 = require("../../src/bitgo");
const secp256k1_1 = require("@noble/curves/secp256k1");
const n = BigInt(secp256k1_1.secp256k1.CURVE.n);
const nDiv2 = n / BigInt(2);
function bytesToBigInt(bytes) {
return BigInt(`0x${Buffer.from(bytes).toString('hex')}`);
}
function changeSignatureToHighS(signatureBuffer) {
if (!bitcoinjs_lib_1.script.isCanonicalScriptSignature(signatureBuffer)) {
throw new Error(`not canonical`);
}
const { signature, hashType } = bitcoinjs_lib_1.ScriptSignature.decode(signatureBuffer);
const r = signature.subarray(0, 32);
const s = signature.subarray(32);
if (r.length !== 32 || s.length !== 32) {
throw new Error(`invalid scalar length`);
}
let ss = bytesToBigInt(s);
if (ss > nDiv2) {
throw new Error(`signature already has high s value`);
}
// convert to high-S
ss = n - ss;
const newSig = bitcoinjs_lib_1.ScriptSignature.encode(Buffer.concat([r, Buffer.from(ss.toString(16).padStart(64, '0'), 'hex')]), hashType);
if (!bitcoinjs_lib_1.script.isCanonicalScriptSignature(newSig)) {
throw new Error(`newSig not canonical`);
}
return newSig;
}
function changeSignatureScriptToHighS(v, signature) {
const parts = Buffer.isBuffer(v) ? bitcoinjs_lib_1.script.decompile(v) : v;
if (!parts) {
throw new Error(`could not decompile input`);
}
const newParts = parts.map((p) => {
if (typeof p === 'number') {
return p;
}
return p.equals(signature) ? changeSignatureToHighS(p) : Buffer.from(p);
});
return Buffer.isBuffer(v) ? bitcoinjs_lib_1.script.compile(newParts) : newParts;
}
function getTransactionWithHighS(tx, inputIndex) {
const parsed = (0, bitgo_1.parseSignatureScript)(tx.ins[inputIndex]);
switch (parsed.scriptType) {
case 'p2sh':
case 'p2shP2wsh':
case 'p2wsh':
break;
default:
return [];
}
return parsed.signatures.flatMap((signature) => {
if ((0, bitgo_1.isPlaceholderSignature)(signature)) {
return [];
}
const cloned = tx.clone();
cloned.ins[inputIndex].script = changeSignatureScriptToHighS(cloned.ins[inputIndex].script, signature);
cloned.ins[inputIndex].witness = changeSignatureScriptToHighS(cloned.ins[inputIndex].witness, signature);
if ((0, bitgo_1.parseSignatureScript)(cloned.ins[inputIndex]).scriptType !== parsed.scriptType) {
throw new Error(`could not parse modified input`);
}
return [cloned];
});
}
/** Return transaction with script xored with 0xff for the given input */
function getPrevOutsWithInvalidOutputScript(prevOuts, inputIndex) {
return prevOuts.map((prevOut, i) => {
return i === inputIndex
? {
...prevOut,
script: prevOut.script.map((v) => v ^ 0xff),
}
: prevOut;
});
}
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ss;\n\n  const newSig = ScriptSignature.encode(\n    Buffer.concat([r, Buffer.from(ss.toString(16).padStart(64, '0'), 'hex')]),\n    hashType\n  );\n  if (!script.isCanonicalScriptSignature(newSig)) {\n    throw new Error(`newSig not canonical`);\n  }\n  return newSig;\n}\n\nfunction changeSignatureScriptToHighS(script: Buffer, signature: Buffer): Buffer;\nfunction changeSignatureScriptToHighS(witness: Buffer[], signature: Buffer): Buffer[];\nfunction changeSignatureScriptToHighS(v: Buffer | Buffer[], signature: Buffer): Buffer | Buffer[] {\n  const parts = Buffer.isBuffer(v) ? script.decompile(v) : v;\n  if (!parts) {\n    throw new Error(`could not decompile input`);\n  }\n  const newParts = parts.map((p) => {\n    if (typeof p === 'number') {\n      return p;\n    }\n    return p.equals(signature) ? changeSignatureToHighS(p) : Buffer.from(p);\n  });\n  return Buffer.isBuffer(v) ? script.compile(newParts) : (newParts as Buffer[]);\n}\n\nexport function getTransactionWithHighS<TNumber extends number | bigint>(\n  tx: UtxoTransaction<TNumber>,\n  inputIndex: number\n): UtxoTransaction<TNumber>[] {\n  const parsed = parseSignatureScript(tx.ins[inputIndex]);\n  switch (parsed.scriptType) {\n    case 'p2sh':\n    case 'p2shP2wsh':\n    case 'p2wsh':\n      break;\n    default:\n      return [];\n  }\n  return parsed.signatures.flatMap((signature) => {\n    if (isPlaceholderSignature(signature)) {\n      return [];\n    }\n    const cloned = tx.clone();\n    cloned.ins[inputIndex].script = changeSignatureScriptToHighS(cloned.ins[inputIndex].script, signature);\n    cloned.ins[inputIndex].witness = changeSignatureScriptToHighS(cloned.ins[inputIndex].witness, signature);\n    if (parseSignatureScript(cloned.ins[inputIndex]).scriptType !== parsed.scriptType) {\n      throw new Error(`could not parse modified input`);\n    }\n    return [cloned];\n  });\n}\n\n/** Return transaction with script xored with 0xff for the given input */\nexport function getPrevOutsWithInvalidOutputScript<TNumber extends number | bigint>(\n  prevOuts: TxOutput<TNumber>[],\n  inputIndex: number\n): TxOutput<TNumber>[] {\n  return prevOuts.map((prevOut, i) => {\n    return i === inputIndex\n      ? {\n          ...prevOut,\n          script: prevOut.script.map((v) => v ^ 0xff) as typeof prevOut.script,\n        }\n      : prevOut;\n  });\n}\n"]}Выполнить команду
Для локальной разработки. Не используйте в интернете!