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

Client-side Bitcoin-like JavaScript library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.p2data = p2data;
const tslib_1 = require("tslib");
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 stacksEqual(a, b) {
  if (a.length !== b.length) return false;
  return a.every((x, i) => x.equals(b[i]));
}
function p2data(a, opts) {
  if (!a.data && !a.output) 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),
    output: types_1.typeforce.maybe(types_1.typeforce.Buffer),
    data: types_1.typeforce.maybe(types_1.typeforce.arrayOf(types_1.typeforce.Buffer))
  }, a);
  const network = a.network || networks_1.bitcoin;
  const o = {
    name: 'embed',
    network
  };
  lazy.prop(o, 'output', () => {
    if (!a.data) return;
    return bscript.compile([OPS.OP_RETURN].concat(a.data));
  });
  lazy.prop(o, 'data', () => {
    if (!a.output) return;
    return bscript.decompile(a.output).slice(1);
  });
  if (opts.validate) {
    if (a.output) {
      const chunks = bscript.decompile(a.output);
      if (chunks[0] !== OPS.OP_RETURN) throw new TypeError('Output is invalid');
      if (!chunks.slice(1).every(types_1.typeforce.Buffer)) throw new TypeError('Output is invalid');
      if (a.data && !stacksEqual(a.data, o.data)) throw new TypeError('Data mismatch');
    }
  }
  return Object.assign(o, a);
}
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