110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
/* eslint-disable no-console */
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import zlib from 'zlib'
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import axios from 'axios'
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import Web3 from 'web3'
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import { detectMob } from '@/utils'
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import networkConfig from '@/networkConfig'
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const { APP_ENS_NAME } = process.env
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const groth16 = require('@tornado/websnark/src/groth16')
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function buildGroth16() {
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const isMobile = detectMob()
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const wasmMemory = isMobile ? 1000 : 2000
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return groth16({ wasmInitialMemory: wasmMemory })
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}
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function getEns() {
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const { url } = Object.values(networkConfig.netId1.rpcUrls)[0]
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const provider = new Web3(url)
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return provider.eth.ens
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}
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async function getTornadoKeys(getProgress) {
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try {
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const keys = await Promise.all([
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download({ name: 'tornado.json.gz', contentType: 'string' }),
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download({ name: 'tornadoProvingKey.bin.gz', contentType: 'arraybuffer', getProgress })
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])
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return { circuit: JSON.parse(keys[0]), provingKey: keys[1].buffer }
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} catch (err) {
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console.log('ERR', err)
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throw err
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}
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}
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async function getIPFSIdFromENS(ensName) {
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try {
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const ensInterface = getEns()
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const { decoded } = await ensInterface.getContenthash(ensName)
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return decoded
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} catch (err) {
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throw new Error(err)
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}
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}
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async function fetchFile({ url, name, getProgress, id, retryAttempt = 0 }) {
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try {
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const response = await axios.get(`${url}/${name}`, {
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responseType: 'blob',
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded'
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},
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onDownloadProgress: (progressEvent) => {
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if (typeof getProgress === 'function') {
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const progress = Math.round((progressEvent.loaded * 100) / 9626311)
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getProgress(progress)
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}
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}
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})
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return response
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} catch (err) {
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if (!id) {
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id = await getIPFSIdFromENS(APP_ENS_NAME)
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}
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const knownResources = [
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url,
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`https://ipfs.io/ipfs/${id}`,
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`https://dweb.link/ipfs/${id}`,
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`https://gateway.pinata.cloud/ipfs/${id}`
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]
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if (retryAttempt < knownResources.length) {
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const fallbackUrl = knownResources[retryAttempt]
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retryAttempt++
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const response = await fetchFile({ name, getProgress, retryAttempt, id, url: fallbackUrl })
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return response
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}
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throw err
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}
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}
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/**
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* Function to download
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* @param {*} name filename
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* @param {'base64'|'string'|'binarystring'|'text'|'blob'|'uint8array'|'arraybuffer'|'array'|'nodebuffer'} contentType type of the content.
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* @param getProgress function
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*/
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async function download({ name, contentType, getProgress, eventName = 'events' }) {
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try {
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// eslint-disable-next-line no-undef
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const prefix = __webpack_public_path__.slice(0, -7)
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const response = await fetchFile({ getProgress, url: prefix, name })
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const buffer = Buffer.from(await response.data.arrayBuffer())
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const content = zlib.inflateSync(buffer)
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return content
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} catch (err) {
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throw err
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}
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}
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export { getTornadoKeys, buildGroth16, download }
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