import * as _ from 'lodash';
import {
SideToAssetToken,
SignatureData,
Order,
Side,
TokenByAddress,
OrderParty,
ScreenWidths,
EtherscanLinkSuffixes,
Token,
Networks,
} from 'ts/types';
import * as moment from 'moment';
import isMobile = require('is-mobile');
import * as u2f from 'ts/vendor/u2f_api';
import deepEqual = require('deep-equal');
import ethUtil = require('ethereumjs-util');
import BigNumber from 'bignumber.js';
import {constants} from 'ts/utils/constants';
const LG_MIN_EM = 64;
const MD_MIN_EM = 52;
export const utils = {
assert(condition: boolean, message: string) {
if (!condition) {
throw new Error(message);
}
},
spawnSwitchErr(name: string, value: any) {
return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
},
isNumeric(n: string) {
return !isNaN(parseFloat(n)) && isFinite(Number(n));
},
// This default unix timestamp is used for orders where the user does not specify an expiry date.
// It is a fixed constant so that both the redux store's INITIAL_STATE and components can check for
// whether a user has set an expiry date or not. It is set unrealistically high so as not to collide
// with actual values a user would select.
initialOrderExpiryUnixTimestampSec(): BigNumber {
const m = moment('2050-01-01');
return new BigNumber(m.unix());
},
convertToUnixTimestampSeconds(date: moment.Moment, time?: moment.Moment): BigNumber {
const finalMoment = date;
if (!_.isUndefined(time)) {
finalMoment.hours(time.hours());
finalMoment.minutes(time.minutes());
}
return new BigNumber(finalMoment.unix());
},
convertToMomentFromUnixTimestamp(unixTimestampSec: BigNumber): moment.Moment {
return moment.unix(unixTimestampSec.toNumber());
},
convertToReadableDateTimeFromUnixTimestamp(unixTimestampSec: BigNumber): string {
const m = this.convertToMomentFromUnixTimestamp(unixTimestampSec);
const formattedDate: string = m.format('h:MMa MMMM D YYYY');
return formattedDate;
},
generateOrder(networkId: number, exchangeContract: string, sideToAssetToken: SideToAssetToken,
orderExpiryTimestamp: BigNumber, orderTakerAddress: string, orderMakerAddress: string,
makerFee: BigNumber, takerFee: BigNumber, feeRecipient: string,
signatureData: SignatureData, tokenByAddress: TokenByAddress, orderSalt: BigNumber): Order {
const makerToken = tokenByAddress[sideToAssetToken[Side.deposit].address];
const takerToken = tokenByAddress[sideToAssetToken[Side.receive].address];
const order = {
maker: {
address: orderMakerAddress,
token: {
name: makerToken.name,
symbol: makerToken.symbol,
decimals: makerToken.decimals,
address: makerToken.address,
},
amount: sideToAssetToken[Side.deposit].amount.toString(),
feeAmount: makerFee.toString(),
},
taker: {
address: orderTakerAddress,
token: {
name: takerToken.name,
symbol: takerToken.symbol,
decimals: takerToken.decimals,
address: takerToken.address,
},
amount: sideToAssetToken[Side.receive].amount.toString(),
feeAmount: takerFee.toString(),
},
expiration: orderExpiryTimestamp.toString(),
feeRecipient,
salt: orderSalt.toString(),
signature: signatureData,
exchangeContract,
networkId,
};
return order;
},
consoleLog(message: string) {
/* tslint:disable */
console.log(message);
/* tslint:enable */
},
sleepAsync(ms: number) {
return new Promise(resolve => setTimeout(resolve, ms));
},
deepEqual(actual: any, expected: any, opts?: {strict: boolean}) {
return deepEqual(actual, expected, opts);
},
getColSize(items: number) {
const bassCssGridSize = 12; // Source: http://basscss.com/#basscss-grid
const colSize = 12 / items;
if (!_.isInteger(colSize)) {
throw new Error('Number of cols must be divisible by 12');
}
return colSize;
},
getScreenWidth() {
const documentEl = document.documentElement;
const body = document.getElementsByTagName('body')[0];
const widthInPx = window.innerWidth || documentEl.clientWidth || body.clientWidth;
const bodyStyles: any = window.getComputedStyle(document.querySelector('body'));
const widthInEm = widthInPx / parseFloat(bodyStyles['font-size']);
// This logic mirrors the CSS media queries in BassCSS for the `lg-`, `md-` and `sm-` CSS
// class prefixes. Do not edit these.
if (widthInEm > LG_MIN_EM) {
return ScreenWidths.LG;
} else if (widthInEm > MD_MIN_EM) {
return ScreenWidths.MD;
} else {
return ScreenWidths.SM;
}
},
isUserOnMobile(): boolean {
const isUserOnMobile = isMobile();
return isUserOnMobile;
},
getEtherScanLinkIfExists(addressOrTxHash: string, networkId: number, suffix: EtherscanLinkSuffixes): string {
const networkName = constants.networkNameById[networkId];
if (_.isUndefined(networkName)) {
return undefined;
}
const etherScanPrefix = networkName === Networks.mainnet ? '' : `${networkName.toLowerCase()}.`;
return `https://${etherScanPrefix}etherscan.io/${suffix}/${addressOrTxHash}`;
},
setUrlHash(anchorId: string) {
window.location.hash = anchorId;
},
async isU2FSupportedAsync(): Promise<boolean> {
const w = (window as any);
return new Promise((resolve: (isSupported: boolean) => void) => {
if (w.u2f && !w.u2f.getApiVersion) {
// u2f object was found (Firefox with extension)
resolve(true);
} else {
// u2f object was not found. Using Google polyfill
// HACK: u2f.getApiVersion will simply not return a version if the
// U2F call fails for any reason. Because of this, we set a hard 3sec
// timeout to the request on our end.
const getApiVersionTimeoutMs = 3000;
const intervalId = setTimeout(() => {
resolve(false);
}, getApiVersionTimeoutMs);
u2f.getApiVersion((version: number) => {
clearTimeout(intervalId);
resolve(true);
});
}
});
},
// This checks the error message returned from an injected Web3 instance on the page
// after a user was prompted to sign a message or send a transaction and decided to
// reject the request.
didUserDenyWeb3Request(errMsg: string) {
const metamaskDenialErrMsg = 'User denied message';
const paritySignerDenialErrMsg = 'Request has been rejected';
const ledgerDenialErrMsg = 'Invalid status 6985';
const isUserDeniedErrMsg = _.includes(errMsg, metamaskDenialErrMsg) ||
_.includes(errMsg, paritySignerDenialErrMsg) ||
_.includes(errMsg, ledgerDenialErrMsg);
return isUserDeniedErrMsg;
},
getCurrentEnvironment() {
switch (location.host) {
case constants.DEVELOPMENT_DOMAIN:
return 'development';
case constants.STAGING_DOMAIN:
return 'staging';
case constants.PRODUCTION_DOMAIN:
return 'production';
default:
return 'production';
}
},
getIdFromName(name: string) {
const id = name.replace(/ /g, '-');
return id;
},
getAddressBeginAndEnd(address: string): string {
const truncatedAddress = `${address.substring(0, 6)}...${address.substr(-4)}`; // 0x3d5a...b287
return truncatedAddress;
},
hasUniqueNameAndSymbol(tokens: Token[], token: Token) {
if (token.isRegistered) {
return true; // Since it's registered, it is the canonical token
}
const registeredTokens = _.filter(tokens, t => t.isRegistered);
const tokenWithSameNameIfExists = _.find(registeredTokens, {name: token.name});
const isUniqueName = _.isUndefined(tokenWithSameNameIfExists);
const tokenWithSameSymbolIfExists = _.find(registeredTokens, {name: token.symbol});
const isUniqueSymbol = _.isUndefined(tokenWithSameSymbolIfExists);
return isUniqueName && isUniqueSymbol;
},
};
