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import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
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, ZeroExInstantError } from '../types';
import { getBestAddress } from '../util/address';
import { balanceUtil } from '../util/balance';
import { gasPriceEstimator } from '../util/gas_price_estimator';
import { util } from '../util/util';
import { Button } from './ui/button';
import { Text } from './ui/text';
export interface BuyButtonProps {
buyQuote?: BuyQuote;
assetBuyer?: AssetBuyer;
affiliateInfo?: AffiliateInfo;
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 shouldDisableButton = _.isUndefined(this.props.buyQuote) || _.isUndefined(this.props.assetBuyer);
return (
<Button width="100%" onClick={this._handleClick} isDisabled={shouldDisableButton}>
<Text fontColor={ColorOption.white} fontWeight={600} fontSize="20px">
Buy
</Text>
</Button>
);
}
private readonly _handleClick = async () => {
// The button is disabled when there is no buy quote anyway.
const { buyQuote, assetBuyer, affiliateInfo } = this.props;
if (_.isUndefined(buyQuote) || _.isUndefined(assetBuyer)) {
return;
}
this.props.onValidationPending(buyQuote);
const web3Wrapper = new Web3Wrapper(assetBuyer.provider);
const takerAddress = await getBestAddress(web3Wrapper);
const hasSufficientEth = await balanceUtil.hasSufficientEth(takerAddress, buyQuote, web3Wrapper);
if (!hasSufficientEth) {
this.props.onValidationFail(buyQuote, ZeroExInstantError.InsufficientETH);
return;
}
let txHash: string | undefined;
const gasInfo = await gasPriceEstimator.getGasInfoAsync();
const feeRecipient = oc(affiliateInfo).feeRecipient();
try {
txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, {
feeRecipient,
takerAddress,
gasPrice: gasInfo.gasPriceInWei,
});
} catch (e) {
if (e instanceof Error) {
if (e.message === AssetBuyerError.SignatureRequestDenied) {
this.props.onSignatureDenied(buyQuote);
return;
} else if (e.message === AssetBuyerError.TransactionValueTooLow) {
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 {
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
} catch (e) {
if (e instanceof Error && e.message.startsWith(WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX)) {
this.props.onBuyFailure(buyQuote, txHash);
return;
}
throw e;
}
this.props.onBuySuccess(buyQuote, txHash);
};
}
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