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import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
import { AssetProxyId } from '@0x/types';
import { BigNumber } from '@0x/utils';
import { Web3Wrapper } from '@0x/web3-wrapper';
import * as _ from 'lodash';
import * as React from 'react';
import { oc } from 'ts-optchain';
import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
import { ColorOption } from '../style/theme';
import { AffiliateInfo, Asset, ZeroExInstantError } from '../types';
import { analytics } from '../util/analytics';
import { gasPriceEstimator } from '../util/gas_price_estimator';
import { util } from '../util/util';
import { Button } from './ui/button';
export interface BuyButtonProps {
accountAddress?: string;
accountEthBalanceInWei?: BigNumber;
buyQuote?: BuyQuote;
assetBuyer: AssetBuyer;
web3Wrapper: Web3Wrapper;
affiliateInfo?: AffiliateInfo;
selectedAsset?: Asset;
onValidationPending: (buyQuote: BuyQuote) => void;
onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
onSignatureDenied: (buyQuote: BuyQuote) => void;
onBuyProcessing: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) => void;
onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
onBuyFailure: (buyQuote: BuyQuote, txHash: string) => void;
}
export class BuyButton extends React.Component<BuyButtonProps> {
public static defaultProps = {
onClick: util.boundNoop,
onBuySuccess: util.boundNoop,
onBuyFailure: util.boundNoop,
};
public render(): React.ReactNode {
const { buyQuote, accountAddress, selectedAsset } = this.props;
const shouldDisableButton = _.isUndefined(buyQuote) || _.isUndefined(accountAddress);
const buttonText =
!_.isUndefined(selectedAsset) && selectedAsset.metaData.assetProxyId === AssetProxyId.ERC20
? `Buy ${selectedAsset.metaData.symbol.toUpperCase()}`
: 'Buy Now';
return (
<Button
width="100%"
onClick={this._handleClick}
isDisabled={shouldDisableButton}
fontColor={ColorOption.white}
>
{buttonText}
</Button>
);
}
private readonly _handleClick = async () => {
// The button is disabled when there is no buy quote anyway.
const { buyQuote, assetBuyer, affiliateInfo, accountAddress, accountEthBalanceInWei, web3Wrapper } = this.props;
if (_.isUndefined(buyQuote) || _.isUndefined(accountAddress)) {
return;
}
this.props.onValidationPending(buyQuote);
const ethNeededForBuy = buyQuote.worstCaseQuoteInfo.totalEthAmount;
// if we don't have a balance for the user, let the transaction through, it will be handled by the wallet
const hasSufficientEth = _.isUndefined(accountEthBalanceInWei) || accountEthBalanceInWei.gte(ethNeededForBuy);
if (!hasSufficientEth) {
analytics.trackBuyNotEnoughEth(buyQuote);
this.props.onValidationFail(buyQuote, ZeroExInstantError.InsufficientETH);
return;
}
let txHash: string | undefined;
const gasInfo = await gasPriceEstimator.getGasInfoAsync();
const feeRecipient = oc(affiliateInfo).feeRecipient();
try {
analytics.trackBuyStarted(buyQuote);
txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, {
feeRecipient,
takerAddress: accountAddress,
gasPrice: gasInfo.gasPriceInWei,
});
} catch (e) {
if (e instanceof Error) {
if (e.message === AssetBuyerError.SignatureRequestDenied) {
analytics.trackBuySignatureDenied(buyQuote);
this.props.onSignatureDenied(buyQuote);
return;
} else if (e.message === AssetBuyerError.TransactionValueTooLow) {
analytics.trackBuySimulationFailed(buyQuote);
this.props.onValidationFail(buyQuote, AssetBuyerError.TransactionValueTooLow);
return;
}
}
throw e;
}
const startTimeUnix = new Date().getTime();
const expectedEndTimeUnix = startTimeUnix + gasInfo.estimatedTimeMs;
this.props.onBuyProcessing(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
try {
analytics.trackBuyTxSubmitted(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
} catch (e) {
if (e instanceof Error && e.message.startsWith(WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX)) {
analytics.trackBuyTxFailed(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
this.props.onBuyFailure(buyQuote, txHash);
return;
}
throw e;
}
analytics.trackBuyTxSucceeded(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
this.props.onBuySuccess(buyQuote, txHash);
};
}
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