@trezor/utxo-lib/lib/payments/p2pkh.js

Client-side Bitcoin-like JavaScript library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.p2pkh = p2pkh;
const tslib_1 = require("tslib");
const tiny_secp256k1_1 = tslib_1.__importDefault(require("tiny-secp256k1"));
const bs58check = tslib_1.__importStar(require("../bs58check"));
const bcrypto = tslib_1.__importStar(require("../crypto"));
const networks_1 = require("../networks");
const bscript = tslib_1.__importStar(require("../script"));
const lazy = tslib_1.__importStar(require("./lazy"));
const types_1 = require("../types");
const {
  OPS
} = bscript;
function p2pkh(a, opts) {
  if (!a.address && !a.hash && !a.output && !a.pubkey && !a.input) throw new TypeError('Not enough data');
  opts = Object.assign({
    validate: true
  }, opts || {});
  (0, types_1.typeforce)({
    network: types_1.typeforce.maybe(types_1.typeforce.Object),
    address: types_1.typeforce.maybe(types_1.typeforce.String),
    hash: types_1.typeforce.maybe(types_1.typeforce.BufferN(20)),
    output: types_1.typeforce.maybe(types_1.typeforce.BufferN(25)),
    pubkey: types_1.typeforce.maybe(tiny_secp256k1_1.default.isPoint),
    signature: types_1.typeforce.maybe(bscript.isCanonicalScriptSignature),
    input: types_1.typeforce.maybe(types_1.typeforce.Buffer)
  }, a);
  const _address = lazy.value(() => bs58check.decodeAddress(a.address, a.network));
  const _chunks = lazy.value(() => bscript.decompile(a.input));
  const network = a.network || networks_1.bitcoin;
  const o = {
    name: 'p2pkh',
    network
  };
  lazy.prop(o, 'address', () => {
    if (!o.hash) return;
    return bs58check.encodeAddress(o.hash, network.pubKeyHash, network);
  });
  lazy.prop(o, 'hash', () => {
    if (a.output) return a.output.subarray(3, 23);
    if (a.address) return _address().hash;
    if (a.pubkey || o.pubkey) return bcrypto.hash160(a.pubkey || o.pubkey);
  });
  lazy.prop(o, 'output', () => {
    if (!o.hash) return;
    return bscript.compile([OPS.OP_DUP, OPS.OP_HASH160, o.hash, OPS.OP_EQUALVERIFY, OPS.OP_CHECKSIG]);
  });
  lazy.prop(o, 'pubkey', () => {
    if (!a.input) return;
    return _chunks()[1];
  });
  lazy.prop(o, 'signature', () => {
    if (!a.input) return;
    return _chunks()[0];
  });
  lazy.prop(o, 'input', () => {
    if (!a.pubkey) return;
    if (!a.signature) return;
    return bscript.compile([a.signature, a.pubkey]);
  });
  lazy.prop(o, 'witness', () => {
    if (!o.input) return;
    return [];
  });
  if (opts.validate) {
    let hash = Buffer.from([]);
    if (a.address) {
      const {
        version,
        hash: aHash
      } = _address();
      if (version !== network.pubKeyHash) throw new TypeError('Invalid version or Network mismatch');
      if (aHash.length !== 20) throw new TypeError('Invalid address');
      hash = aHash;
    }
    if (a.hash) {
      if (hash.length > 0 && !hash.equals(a.hash)) throw new TypeError('Hash mismatch');else hash = a.hash;
    }
    if (a.output) {
      if (a.output.length !== 25 || a.output[0] !== OPS.OP_DUP || a.output[1] !== OPS.OP_HASH160 || a.output[2] !== 0x14 || a.output[23] !== OPS.OP_EQUALVERIFY || a.output[24] !== OPS.OP_CHECKSIG) throw new TypeError('Output is invalid');
      const hash2 = a.output.subarray(3, 23);
      if (hash.length > 0 && !hash.equals(hash2)) throw new TypeError('Hash mismatch');else hash = hash2;
    }
    if (a.pubkey) {
      const pkh = bcrypto.hash160(a.pubkey);
      if (hash.length > 0 && !hash.equals(pkh)) throw new TypeError('Hash mismatch');else hash = pkh;
    }
    if (a.input) {
      const chunks = _chunks();
      if (chunks.length !== 2) throw new TypeError('Input is invalid');
      if (!bscript.isCanonicalScriptSignature(chunks[0])) throw new TypeError('Input has invalid signature');
      if (!tiny_secp256k1_1.default.isPoint(chunks[1])) throw new TypeError('Input has invalid pubkey');
      if (a.signature && !a.signature.equals(chunks[0])) throw new TypeError('Signature mismatch');
      if (a.pubkey && !a.pubkey.equals(chunks[1])) throw new TypeError('Pubkey mismatch');
      const pkh = bcrypto.hash160(chunks[1]);
      if (hash.length > 0 && !hash.equals(pkh)) throw new TypeError('Hash mismatch');
    }
  }
  return Object.assign(o, a);
}
//# sourceMappingURL=p2pkh.js.map