bitcoinjs-lib
Version:
Client-side Bitcoin JavaScript library
221 lines (220 loc) • 7 kB
JavaScript
;
var __createBinding =
(this && this.__createBinding) ||
(Object.create
? function (o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (
!desc ||
('get' in desc ? !m.__esModule : desc.writable || desc.configurable)
) {
desc = {
enumerable: true,
get: function () {
return m[k];
},
};
}
Object.defineProperty(o, k2, desc);
}
: function (o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
});
var __setModuleDefault =
(this && this.__setModuleDefault) ||
(Object.create
? function (o, v) {
Object.defineProperty(o, 'default', { enumerable: true, value: v });
}
: function (o, v) {
o['default'] = v;
});
var __importStar =
(this && this.__importStar) ||
function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null)
for (var k in mod)
if (k !== 'default' && Object.prototype.hasOwnProperty.call(mod, k))
__createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, '__esModule', { value: true });
exports.p2ms = p2ms;
const networks_js_1 = require('../networks.cjs');
const bscript = __importStar(require('../script.cjs'));
const scriptNumber = __importStar(require('../script_number.cjs'));
const types_js_1 = require('../types.cjs');
const lazy = __importStar(require('./lazy.cjs'));
const v = __importStar(require('valibot'));
const OPS = bscript.OPS;
const OP_INT_BASE = OPS.OP_RESERVED; // OP_1 - 1
function encodeSmallOrScriptNum(n) {
return n <= 16 ? OP_INT_BASE + n : scriptNumber.encode(n);
}
function decodeSmallOrScriptNum(chunk) {
if (typeof chunk === 'number') {
const val = chunk - OP_INT_BASE;
if (val < 1 || val > 16)
throw new TypeError(`Invalid opcode: expected OP_1–OP_16, got ${chunk}`);
return val;
} else return scriptNumber.decode(chunk);
}
function isSmallOrScriptNum(chunk) {
if (typeof chunk === 'number')
return chunk - OP_INT_BASE >= 1 && chunk - OP_INT_BASE <= 16;
else return Number.isInteger(scriptNumber.decode(chunk));
}
// input: OP_0 [signatures ...]
// output: m [pubKeys ...] n OP_CHECKMULTISIG
/**
* Represents a function that creates a Pay-to-Multisig (P2MS) payment object.
* @param a - The payment object.
* @param opts - Optional payment options.
* @returns The created payment object.
* @throws {TypeError} If the provided data is not valid.
*/
function p2ms(a, opts) {
if (
!a.input &&
!a.output &&
!(a.pubkeys && a.m !== undefined) &&
!a.signatures
)
throw new TypeError('Not enough data');
opts = Object.assign({ validate: true }, opts || {});
function isAcceptableSignature(x) {
return (
bscript.isCanonicalScriptSignature(x) ||
(opts.allowIncomplete && x === OPS.OP_0) !== undefined
);
}
v.parse(
v.partial(
v.object({
network: v.object({}),
m: v.number(),
n: v.number(),
output: types_js_1.BufferSchema,
pubkeys: v.array(
v.custom(types_js_1.isPoint),
'Received invalid pubkey',
),
signatures: v.array(
v.custom(isAcceptableSignature),
'Expected signature to be of type isAcceptableSignature',
),
input: types_js_1.BufferSchema,
}),
),
a,
);
const network = a.network || networks_js_1.bitcoin;
const o = { network };
let chunks = [];
let decoded = false;
function decode(output) {
if (decoded) return;
decoded = true;
chunks = bscript.decompile(output);
if (chunks.length < 3) throw new TypeError('Output is invalid');
o.m = decodeSmallOrScriptNum(chunks[0]);
o.n = decodeSmallOrScriptNum(chunks[chunks.length - 2]);
o.pubkeys = chunks.slice(1, -2);
}
lazy.prop(o, 'output', () => {
if (!a.m) return;
if (!o.n) return;
if (!a.pubkeys) return;
return bscript.compile(
[].concat(
encodeSmallOrScriptNum(a.m),
a.pubkeys,
encodeSmallOrScriptNum(o.n),
OPS.OP_CHECKMULTISIG,
),
);
});
lazy.prop(o, 'm', () => {
if (!o.output) return;
decode(o.output);
return o.m;
});
lazy.prop(o, 'n', () => {
if (!o.pubkeys) return;
return o.pubkeys.length;
});
lazy.prop(o, 'pubkeys', () => {
if (!a.output) return;
decode(a.output);
return o.pubkeys;
});
lazy.prop(o, 'signatures', () => {
if (!a.input) return;
return bscript.decompile(a.input).slice(1);
});
lazy.prop(o, 'input', () => {
if (!a.signatures) return;
return bscript.compile([OPS.OP_0].concat(a.signatures));
});
lazy.prop(o, 'witness', () => {
if (!o.input) return;
return [];
});
lazy.prop(o, 'name', () => {
if (!o.m || !o.n) return;
return `p2ms(${o.m} of ${o.n})`;
});
// extended validation
if (opts.validate) {
if (a.output) {
decode(a.output);
if (!isSmallOrScriptNum(chunks[0]))
throw new TypeError('Output is invalid');
if (!isSmallOrScriptNum(chunks[chunks.length - 2]))
throw new TypeError('Output is invalid');
if (chunks[chunks.length - 1] !== OPS.OP_CHECKMULTISIG)
throw new TypeError('Output is invalid');
if (o.m <= 0 || o.n > 20 || o.m > o.n || o.n !== chunks.length - 3)
throw new TypeError('Output is invalid');
if (!o.pubkeys.every(x => (0, types_js_1.isPoint)(x)))
throw new TypeError('Output is invalid');
if (a.m !== undefined && a.m !== o.m) throw new TypeError('m mismatch');
if (a.n !== undefined && a.n !== o.n) throw new TypeError('n mismatch');
if (a.pubkeys && !(0, types_js_1.stacksEqual)(a.pubkeys, o.pubkeys))
throw new TypeError('Pubkeys mismatch');
}
if (a.pubkeys) {
if (a.n !== undefined && a.n !== a.pubkeys.length)
throw new TypeError('Pubkey count mismatch');
o.n = a.pubkeys.length;
if (o.n < o.m) throw new TypeError('Pubkey count cannot be less than m');
}
if (a.signatures) {
if (a.signatures.length < o.m)
throw new TypeError('Not enough signatures provided');
if (a.signatures.length > o.m)
throw new TypeError('Too many signatures provided');
}
if (a.input) {
if (a.input[0] !== OPS.OP_0) throw new TypeError('Input is invalid');
if (
o.signatures.length === 0 ||
!o.signatures.every(isAcceptableSignature)
)
throw new TypeError('Input has invalid signature(s)');
if (
a.signatures &&
!(0, types_js_1.stacksEqual)(a.signatures, o.signatures)
)
throw new TypeError('Signature mismatch');
if (a.m !== undefined && a.m !== a.signatures.length)
throw new TypeError('Signature count mismatch');
}
}
return Object.assign(o, a);
}