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347 lines
10 KiB
347 lines
10 KiB
import punycode from 'punycode/punycode';
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import abi from 'human-standard-token-abi';
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import BigNumber from 'bignumber.js';
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import * as ethUtil from 'ethereumjs-util';
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import { DateTime } from 'luxon';
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import { addHexPrefix } from '../../../app/scripts/lib/util';
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import {
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GOERLI_CHAIN_ID,
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KOVAN_CHAIN_ID,
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LOCALHOST_CHAIN_ID,
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MAINNET_CHAIN_ID,
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RINKEBY_CHAIN_ID,
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ROPSTEN_CHAIN_ID,
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} from '../../../shared/constants/network';
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import { toChecksumHexAddress } from '../../../shared/modules/hexstring-utils';
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// formatData :: ( date: <Unix Timestamp> ) -> String
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export function formatDate(date, format = "M/d/y 'at' T") {
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return DateTime.fromMillis(date).toFormat(format);
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}
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export function formatDateWithYearContext(
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date,
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formatThisYear = 'MMM d',
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fallback = 'MMM d, y',
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) {
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const dateTime = DateTime.fromMillis(date);
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const now = DateTime.local();
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return dateTime.toFormat(
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now.year === dateTime.year ? formatThisYear : fallback,
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);
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}
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/**
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* Determines if the provided chainId is a default MetaMask chain
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* @param {string} chainId - chainId to check
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*/
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export function isDefaultMetaMaskChain(chainId) {
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if (
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!chainId ||
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chainId === MAINNET_CHAIN_ID ||
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chainId === ROPSTEN_CHAIN_ID ||
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chainId === RINKEBY_CHAIN_ID ||
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chainId === KOVAN_CHAIN_ID ||
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chainId === GOERLI_CHAIN_ID ||
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chainId === LOCALHOST_CHAIN_ID
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) {
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return true;
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}
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return false;
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}
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export function valuesFor(obj) {
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if (!obj) {
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return [];
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}
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return Object.keys(obj).map(function (key) {
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return obj[key];
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});
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}
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export function addressSummary(
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address,
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firstSegLength = 10,
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lastSegLength = 4,
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includeHex = true,
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) {
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if (!address) {
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return '';
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}
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let checked = toChecksumHexAddress(address);
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if (!includeHex) {
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checked = ethUtil.stripHexPrefix(checked);
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}
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return checked
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? `${checked.slice(0, firstSegLength)}...${checked.slice(
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checked.length - lastSegLength,
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)}`
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: '...';
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}
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export function isValidDomainName(address) {
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const match = punycode
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.toASCII(address)
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.toLowerCase()
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// Checks that the domain consists of at least one valid domain pieces separated by periods, followed by a tld
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// Each piece of domain name has only the characters a-z, 0-9, and a hyphen (but not at the start or end of chunk)
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// A chunk has minimum length of 1, but minimum tld is set to 2 for now (no 1-character tlds exist yet)
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.match(
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/^(?:[a-z0-9](?:[-a-z0-9]*[a-z0-9])?\.)+[a-z0-9][-a-z0-9]*[a-z0-9]$/u,
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);
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return match !== null;
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}
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export function isOriginContractAddress(to, sendTokenAddress) {
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if (!to || !sendTokenAddress) {
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return false;
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}
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return to.toLowerCase() === sendTokenAddress.toLowerCase();
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}
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// Takes wei Hex, returns wei BN, even if input is null
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export function numericBalance(balance) {
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if (!balance) {
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return new ethUtil.BN(0, 16);
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}
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const stripped = ethUtil.stripHexPrefix(balance);
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return new ethUtil.BN(stripped, 16);
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}
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// Takes hex, returns [beforeDecimal, afterDecimal]
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export function parseBalance(balance) {
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let afterDecimal;
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const wei = numericBalance(balance);
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const weiString = wei.toString();
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const trailingZeros = /0+$/u;
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const beforeDecimal =
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weiString.length > 18 ? weiString.slice(0, weiString.length - 18) : '0';
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afterDecimal = `000000000000000000${wei}`
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.slice(-18)
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.replace(trailingZeros, '');
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if (afterDecimal === '') {
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afterDecimal = '0';
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}
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return [beforeDecimal, afterDecimal];
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}
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// Takes wei hex, returns an object with three properties.
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// Its "formatted" property is what we generally use to render values.
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export function formatBalance(
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balance,
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decimalsToKeep,
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needsParse = true,
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ticker = 'ETH',
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) {
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const parsed = needsParse ? parseBalance(balance) : balance.split('.');
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const beforeDecimal = parsed[0];
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let afterDecimal = parsed[1];
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let formatted = 'None';
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if (decimalsToKeep === undefined) {
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if (beforeDecimal === '0') {
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if (afterDecimal !== '0') {
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const sigFigs = afterDecimal.match(/^0*(.{2})/u); // default: grabs 2 most significant digits
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if (sigFigs) {
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afterDecimal = sigFigs[0];
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}
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formatted = `0.${afterDecimal} ${ticker}`;
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}
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} else {
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formatted = `${beforeDecimal}.${afterDecimal.slice(0, 3)} ${ticker}`;
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}
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} else {
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afterDecimal += Array(decimalsToKeep).join('0');
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formatted = `${beforeDecimal}.${afterDecimal.slice(
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0,
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decimalsToKeep,
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)} ${ticker}`;
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}
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return formatted;
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}
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export function getContractAtAddress(tokenAddress) {
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return global.eth.contract(abi).at(tokenAddress);
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}
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export function getRandomFileName() {
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let fileName = '';
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const charBank = [
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...'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
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];
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const fileNameLength = Math.floor(Math.random() * 7 + 6);
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for (let i = 0; i < fileNameLength; i++) {
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fileName += charBank[Math.floor(Math.random() * charBank.length)];
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}
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return fileName;
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}
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export function exportAsFile(filename, data, type = 'text/csv') {
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// eslint-disable-next-line no-param-reassign
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filename = filename || getRandomFileName();
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// source: https://stackoverflow.com/a/33542499 by Ludovic Feltz
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const blob = new window.Blob([data], { type });
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if (window.navigator.msSaveOrOpenBlob) {
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window.navigator.msSaveBlob(blob, filename);
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} else {
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const elem = window.document.createElement('a');
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elem.target = '_blank';
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elem.href = window.URL.createObjectURL(blob);
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elem.download = filename;
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document.body.appendChild(elem);
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elem.click();
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document.body.removeChild(elem);
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}
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}
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/**
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* Shortens an Ethereum address for display, preserving the beginning and end.
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* Returns the given address if it is no longer than 10 characters.
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* Shortened addresses are 13 characters long.
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*
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* Example output: 0xabcd...1234
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*
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* @param {string} address - The address to shorten.
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* @returns {string} The shortened address, or the original if it was no longer
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* than 10 characters.
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*/
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export function shortenAddress(address = '') {
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if (address.length < 11) {
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return address;
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}
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return `${address.slice(0, 6)}...${address.slice(-4)}`;
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}
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export function getAccountByAddress(accounts = [], targetAddress) {
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return accounts.find(({ address }) => address === targetAddress);
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}
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/**
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* Strips the following schemes from URL strings:
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* - http
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* - https
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*
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* @param {string} urlString - The URL string to strip the scheme from.
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* @returns {string} The URL string, without the scheme, if it was stripped.
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*/
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export function stripHttpSchemes(urlString) {
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return urlString.replace(/^https?:\/\//u, '');
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}
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/**
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* Strips the following schemes from URL strings:
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* - https
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*
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* @param {string} urlString - The URL string to strip the scheme from.
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* @returns {string} The URL string, without the scheme, if it was stripped.
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*/
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export function stripHttpsScheme(urlString) {
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return urlString.replace(/^https:\/\//u, '');
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}
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/**
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* Checks whether a URL-like value (object or string) is an extension URL.
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*
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* @param {string | URL | object} urlLike - The URL-like value to test.
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* @returns {boolean} Whether the URL-like value is an extension URL.
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*/
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export function isExtensionUrl(urlLike) {
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const EXT_PROTOCOLS = ['chrome-extension:', 'moz-extension:'];
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if (typeof urlLike === 'string') {
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for (const protocol of EXT_PROTOCOLS) {
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if (urlLike.startsWith(protocol)) {
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return true;
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}
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}
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}
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if (urlLike?.protocol) {
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return EXT_PROTOCOLS.includes(urlLike.protocol);
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}
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return false;
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}
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/**
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* Checks whether an address is in a passed list of objects with address properties. The check is performed on the
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* lowercased version of the addresses.
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*
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* @param {string} address - The hex address to check
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* @param {Array} list - The array of objects to check
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* @returns {boolean} Whether or not the address is in the list
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*/
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export function checkExistingAddresses(address, list = []) {
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if (!address) {
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return false;
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}
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const matchesAddress = (obj) => {
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return obj.address.toLowerCase() === address.toLowerCase();
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};
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return list.some(matchesAddress);
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}
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/**
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* Given a number and specified precision, returns that number in base 10 with a maximum of precision
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* significant digits, but without any trailing zeros after the decimal point To be used when wishing
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* to display only as much digits to the user as necessary
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*
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* @param {string | number | BigNumber} n - The number to format
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* @param {number} precision - The maximum number of significant digits in the return value
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* @returns {string} The number in decimal form, with <= precision significant digits and no decimal trailing zeros
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*/
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export function toPrecisionWithoutTrailingZeros(n, precision) {
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return new BigNumber(n)
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.toPrecision(precision)
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.replace(/(\.[0-9]*[1-9])0*|(\.0*)/u, '$1');
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}
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/**
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* Given and object where all values are strings, returns the same object with all values
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* now prefixed with '0x'
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*/
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export function addHexPrefixToObjectValues(obj) {
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return Object.keys(obj).reduce((newObj, key) => {
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return { ...newObj, [key]: addHexPrefix(obj[key]) };
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}, {});
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}
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/**
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* Given the standard set of information about a transaction, returns a transaction properly formatted for
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* publishing via JSON RPC and web3
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*
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* @param {boolean} [sendToken] - Indicates whether or not the transaciton is a token transaction
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* @param {string} data - A hex string containing the data to include in the transaction
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* @param {string} to - A hex address of the tx recipient address
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* @param {string} from - A hex address of the tx sender address
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* @param {string} gas - A hex representation of the gas value for the transaction
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* @param {string} gasPrice - A hex representation of the gas price for the transaction
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* @returns {Object} An object ready for submission to the blockchain, with all values appropriately hex prefixed
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*/
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export function constructTxParams({
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sendToken,
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data,
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to,
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amount,
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from,
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gas,
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gasPrice,
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}) {
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const txParams = {
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data,
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from,
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value: '0',
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gas,
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gasPrice,
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};
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if (!sendToken) {
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txParams.value = amount;
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txParams.to = to;
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}
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return addHexPrefixToObjectValues(txParams);
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}
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