36 lines
1.1 KiB
JavaScript
36 lines
1.1 KiB
JavaScript
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/* eslint-disable require-atomic-updates */
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import bls from "bls-eth-wasm";
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import { NotInitializedError } from "../errors.js";
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let blsGlobal = null;
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let blsGlobalPromise = null;
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export async function setupBls() {
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if (!blsGlobal) {
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await bls.init(bls.BLS12_381);
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// Patch to fix multiVerify() calls on a browser with polyfilled NodeJS crypto
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if (typeof window === "object") {
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const crypto = window.crypto || window.msCrypto;
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// getRandomValues is not typed in `bls-eth-wasm` because it's not meant to be exposed
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// @ts-ignore
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bls.getRandomValues = (x) => crypto.getRandomValues(x);
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}
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blsGlobal = bls;
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}
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}
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// Cache a promise for Bls instead of Bls to make sure it is initialized only once
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export async function init() {
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if (!blsGlobalPromise) {
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blsGlobalPromise = setupBls();
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}
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return blsGlobalPromise;
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}
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export function destroy() {
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blsGlobal = null;
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blsGlobalPromise = null;
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}
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export function getContext() {
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if (!blsGlobal) {
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throw new NotInitializedError("herumi");
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}
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return blsGlobal;
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}
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