82 lines
2.3 KiB
JavaScript
82 lines
2.3 KiB
JavaScript
const fetch = require('node-fetch')
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const { isHexStrict } = require('web3-utils')
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const { gasOracleUrls } = require('./config')
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async function fetchGasPrice({ gasPrices, oracleIndex = 0 }) {
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oracleIndex = (oracleIndex + 1) % gasOracleUrls.length
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try {
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const response = await fetch(gasOracleUrls[oracleIndex])
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if (response.status === 200) {
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const json = await response.json()
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if (json.slow) {
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gasPrices.low = Number(json.slow)
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}
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if (json.safeLow) {
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gasPrices.low = Number(json.safeLow)
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}
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if (json.standard) {
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gasPrices.standard = Number(json.standard)
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}
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if (json.fast) {
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gasPrices.fast = Number(json.fast)
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}
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} else {
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throw Error('Fetch gasPrice failed')
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}
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setTimeout(() => fetchGasPrice({ gasPrices, oracleIndex }), 15000)
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} catch (e) {
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setTimeout(() => fetchGasPrice({ gasPrices, oracleIndex }), 15000)
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}
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}
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function isValidProof(proof) {
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// validator expects `websnarkUtils.toSolidityInput(proof)` output
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if (!(proof.pi_a && proof.pi_b && proof.pi_c && proof.publicSignals)) {
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return { valid: false, reason: 'One of inputs is empty. There must be pi_a, pi_b, pi_c and publicSignals' }
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}
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Object.keys(proof).forEach(key => {
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if (!Array.isArray(proof[key])) {
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return { valid: false, reason: `Corrupted ${key}` }
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}
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if (key === 'pi_b') {
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if (!Array.isArray(proof[key][0]) || !Array.isArray(proof[key][1])) {
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return { valid: false, reason: `Corrupted ${key}` }
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}
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}
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})
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if (proof.pi_a.length !== 2) {
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return { valid: false, reason: 'Corrupted pi_a' }
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}
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if (proof.pi_b.length !== 2 || proof.pi_b[0].length !== 2 || proof.pi_b[1].length !== 2) {
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return { valid: false, reason: 'Corrupted pi_b' }
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}
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if (proof.pi_c.length !== 2) {
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return { valid: false, reason: 'Corrupted pi_c' }
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}
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if (proof.publicSignals.length !== 4) {
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return { valid: false, reason: 'Corrupted publicSignals' }
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}
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for (let [key, input] of Object.entries(proof)) {
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if (key === 'pi_b') {
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input = input[0].concat(input[1])
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}
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for (let i = 0; i < input.length; i++ ) {
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if (!isHexStrict(input[i]) || input[i].length !== 66) {
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return { valid: false, reason: `Corrupted ${key}` }
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}
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}
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}
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return { valid: true }
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}
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module.exports = { fetchGasPrice, isValidProof }
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