@bitgo/bls/lib/context.js

Implementation of bls signature verification for ethereum 2.0

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.setupBls = setupBls;
exports.init = init;
exports.destroy = destroy;
exports.getContext = getContext;

var _eth2BlsWasm = _interopRequireDefault(require("@bitgo/eth2-bls-wasm"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable require-atomic-updates */
let blsGlobal = null;
let blsGlobalPromise = null;

async function setupBls() {
  if (!blsGlobal) {
    await _eth2BlsWasm.default.init();
    blsGlobal = _eth2BlsWasm.default;
  }

  return blsGlobal;
} // Cache a promise for Bls instead of Bls to make sure it is initialized only once


async function init() {
  if (!blsGlobalPromise) {
    blsGlobalPromise = setupBls();
  }

  return blsGlobalPromise;
}

function destroy() {
  blsGlobal = null;
  blsGlobalPromise = null;
}

function getContext() {
  if (!blsGlobal) {
    throw new Error("BLS not initialized");
  }

  return blsGlobal;
}