import { ECSignature, ExchangeContractErrs, Web3Provider, ZeroEx, ZeroExError } from '0x.js';
import { constants as sharedConstants, EtherscanLinkSuffixes, Networks } from '@0xproject/react-shared';
import { BigNumber } from '@0xproject/utils';
import deepEqual = require('deep-equal');
import * as _ from 'lodash';
import * as moment from 'moment';
import { Order, Providers, ScreenWidths, Side, SideToAssetToken, Token, TokenByAddress } from 'ts/types';
import { configs } from 'ts/utils/configs';
import { constants } from 'ts/utils/constants';
import * as u2f from 'ts/vendor/u2f_api';
import Web3 = require('web3');
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(
exchangeContractAddress: string,
sideToAssetToken: SideToAssetToken,
expirationUnixTimestampSec: BigNumber,
orderTakerAddress: string,
orderMakerAddress: string,
makerFee: BigNumber,
takerFee: BigNumber,
feeRecipient: string,
ecSignature: ECSignature,
tokenByAddress: TokenByAddress,
orderSalt: BigNumber,
): Order {
const makerToken = tokenByAddress[sideToAssetToken[Side.Deposit].address];
const takerToken = tokenByAddress[sideToAssetToken[Side.Receive].address];
const order = {
signedOrder: {
maker: orderMakerAddress,
taker: orderTakerAddress,
makerFee: makerFee.toString(),
takerFee: takerFee.toString(),
makerTokenAmount: sideToAssetToken[Side.Deposit].amount.toString(),
takerTokenAmount: sideToAssetToken[Side.Receive].amount.toString(),
makerTokenAddress: makerToken.address,
takerTokenAddress: takerToken.address,
expirationUnixTimestampSec: expirationUnixTimestampSec.toString(),
feeRecipient,
salt: orderSalt.toString(),
ecSignature,
exchangeContractAddress,
},
metadata: {
makerToken: {
name: makerToken.name,
symbol: makerToken.symbol,
decimals: makerToken.decimals,
},
takerToken: {
name: takerToken.name,
symbol: takerToken.symbol,
decimals: takerToken.decimals,
},
},
};
return order;
},
async 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 = bassCssGridSize / items;
if (!_.isInteger(colSize)) {
throw new Error(`Number of cols must be divisible by ${bassCssGridSize}`);
}
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;
}
},
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';
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 configs.DOMAIN_DEVELOPMENT:
return 'development';
case configs.DOMAIN_STAGING:
return 'staging';
case configs.DOMAIN_PRODUCTION:
return 'production';
default:
return 'production';
}
},
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;
},
zeroExErrToHumanReadableErrMsg(error: ZeroExError | ExchangeContractErrs, takerAddress: string): string {
const ZeroExErrorToHumanReadableError: { [error: string]: string } = {
[ZeroExError.ExchangeContractDoesNotExist]: 'Exchange contract does not exist',
[ZeroExError.EtherTokenContractDoesNotExist]: 'EtherToken contract does not exist',
[ZeroExError.TokenTransferProxyContractDoesNotExist]: 'TokenTransferProxy contract does not exist',
[ZeroExError.TokenRegistryContractDoesNotExist]: 'TokenRegistry contract does not exist',
[ZeroExError.TokenContractDoesNotExist]: 'Token contract does not exist',
[ZeroExError.ZRXContractDoesNotExist]: 'ZRX contract does not exist',
[ZeroExError.UnhandledError]: 'Unhandled error occured',
[ZeroExError.UserHasNoAssociatedAddress]: 'User has no addresses available',
[ZeroExError.InvalidSignature]: 'Order signature is not valid',
[ZeroExError.ContractNotDeployedOnNetwork]: 'Contract is not deployed on the detected network',
[ZeroExError.InvalidJump]: 'Invalid jump occured while executing the transaction',
[ZeroExError.OutOfGas]: 'Transaction ran out of gas',
[ZeroExError.NoNetworkId]: 'No network id detected',
};
const exchangeContractErrorToHumanReadableError: {
[error: string]: string;
} = {
[ExchangeContractErrs.OrderFillExpired]: 'This order has expired',
[ExchangeContractErrs.OrderCancelExpired]: 'This order has expired',
[ExchangeContractErrs.OrderCancelAmountZero]: "Order cancel amount can't be 0",
[ExchangeContractErrs.OrderAlreadyCancelledOrFilled]:
'This order has already been completely filled or cancelled',
[ExchangeContractErrs.OrderFillAmountZero]: "Order fill amount can't be 0",
[ExchangeContractErrs.OrderRemainingFillAmountZero]:
'This order has already been completely filled or cancelled',
[ExchangeContractErrs.OrderFillRoundingError]:
'Rounding error will occur when filling this order. Please try filling a different amount.',
[ExchangeContractErrs.InsufficientTakerBalance]:
'Taker no longer has a sufficient balance to complete this order',
[ExchangeContractErrs.InsufficientTakerAllowance]:
'Taker no longer has a sufficient allowance to complete this order',
[ExchangeContractErrs.InsufficientMakerBalance]:
'Maker no longer has a sufficient balance to complete this order',
[ExchangeContractErrs.InsufficientMakerAllowance]:
'Maker no longer has a sufficient allowance to complete this order',
[ExchangeContractErrs.InsufficientTakerFeeBalance]: 'Taker no longer has a sufficient balance to pay fees',
[ExchangeContractErrs.InsufficientTakerFeeAllowance]:
'Taker no longer has a sufficient allowance to pay fees',
[ExchangeContractErrs.InsufficientMakerFeeBalance]: 'Maker no longer has a sufficient balance to pay fees',
[ExchangeContractErrs.InsufficientMakerFeeAllowance]:
'Maker no longer has a sufficient allowance to pay fees',
[ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker]: `This order can only be filled by ${takerAddress}`,
[ExchangeContractErrs.InsufficientRemainingFillAmount]: 'Insufficient remaining fill amount',
};
const humanReadableErrorMsg =
exchangeContractErrorToHumanReadableError[error] || ZeroExErrorToHumanReadableError[error];
return humanReadableErrorMsg;
},
isParityNode(nodeVersion: string): boolean {
return _.includes(nodeVersion, 'Parity');
},
isTestRpc(nodeVersion: string): boolean {
return _.includes(nodeVersion, 'TestRPC');
},
isTestNetwork(networkId: number): boolean {
const isTestNetwork = _.includes(
[
sharedConstants.NETWORK_ID_BY_NAME[Networks.Kovan],
sharedConstants.NETWORK_ID_BY_NAME[Networks.Rinkeby],
sharedConstants.NETWORK_ID_BY_NAME[Networks.Ropsten],
],
networkId,
);
return isTestNetwork;
},
getCurrentBaseUrl() {
const port = window.location.port;
const hasPort = !_.isUndefined(port);
const baseUrl = `https://${window.location.hostname}${hasPort ? `:${port}` : ''}`;
return baseUrl;
},
async onPageLoadAsync(): Promise<void> {
if (document.readyState === 'complete') {
return; // Already loaded
}
return new Promise<void>((resolve, reject) => {
window.onload = () => resolve();
});
},
getProviderType(provider: Web3.Provider): Providers | string {
const constructorName = provider.constructor.name;
let parsedProviderName = constructorName;
switch (constructorName) {
case 'EthereumProvider':
parsedProviderName = Providers.Mist;
break;
default:
parsedProviderName = constructorName;
break;
}
if ((provider as any).isParity) {
parsedProviderName = Providers.Parity;
} else if ((provider as any).isMetaMask) {
parsedProviderName = Providers.Metamask;
}
return parsedProviderName;
},
};
