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import { AssetBuyer, 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 { connect } from 'react-redux';
import { Dispatch } from 'redux';
import { Action, actions } from '../redux/actions';
import { State } from '../redux/reducer';
import { ColorOption } from '../style/theme';
import { ERC20Asset, OrderProcessState, ZeroExInstantError } from '../types';
import { getBestAddress } from '../util/address';
import { errorUtil } from '../util/error';
import { web3Wrapper } from '../util/web3_wrapper';
import { AssetAmountInput } from '../components/asset_amount_input';
import { ETH_DECIMALS } from '../constants';
export interface SelectedAssetAmountInputProps {
fontColor?: ColorOption;
fontSize?: string;
}
interface ConnectedState {
assetBuyer?: AssetBuyer;
value?: BigNumber;
asset?: ERC20Asset;
}
interface ConnectedDispatch {
updateBuyQuote: (assetBuyer?: AssetBuyer, value?: BigNumber, asset?: ERC20Asset) => void;
}
interface ConnectedProps {
value?: BigNumber;
asset?: ERC20Asset;
onChange: (value?: BigNumber, asset?: ERC20Asset) => void;
}
type FinalProps = ConnectedProps & SelectedAssetAmountInputProps;
const mapStateToProps = (state: State, _ownProps: SelectedAssetAmountInputProps): ConnectedState => {
const selectedAsset = state.selectedAsset;
if (_.isUndefined(selectedAsset) || selectedAsset.metaData.assetProxyId !== AssetProxyId.ERC20) {
return {
value: state.selectedAssetAmount,
};
}
return {
assetBuyer: state.assetBuyer,
value: state.selectedAssetAmount,
asset: selectedAsset as ERC20Asset,
};
};
const updateBuyQuoteAsync = async (
assetBuyer: AssetBuyer,
dispatch: Dispatch<Action>,
asset: ERC20Asset,
assetAmount: BigNumber,
): Promise<void> => {
// get a new buy quote.
const baseUnitValue = Web3Wrapper.toBaseUnitAmount(assetAmount, asset.metaData.decimals);
// mark quote as pending
dispatch(actions.setQuoteRequestStatePending());
let newBuyQuote: BuyQuote | undefined;
try {
newBuyQuote = await assetBuyer.getBuyQuoteAsync(asset.assetData, baseUnitValue);
} catch (error) {
dispatch(actions.setQuoteRequestStateFailure());
errorUtil.errorFlasher.flashNewError(dispatch, error);
return;
}
// We have a successful new buy quote
errorUtil.errorFlasher.clearError(dispatch);
// invalidate the last buy quote.
dispatch(actions.updateLatestBuyQuote(newBuyQuote));
// set error if user doesn't have appropriate balance
const takerAddress = await getBestAddress();
const balanceWei = await web3Wrapper.getBalanceInWeiAsync(takerAddress);
if (balanceWei < newBuyQuote.worstCaseQuoteInfo.totalEthAmount) {
const balanceError = new Error(ZeroExInstantError.InsufficientBalance);
errorUtil.errorFlasher.flashNewError(dispatch, balanceError);
}
};
const debouncedUpdateBuyQuoteAsync = _.debounce(updateBuyQuoteAsync, 200, { trailing: true });
const mapDispatchToProps = (
dispatch: Dispatch<Action>,
_ownProps: SelectedAssetAmountInputProps,
): ConnectedDispatch => ({
updateBuyQuote: (assetBuyer, value, asset) => {
// Update the input
dispatch(actions.updateSelectedAssetAmount(value));
// invalidate the last buy quote.
dispatch(actions.updateLatestBuyQuote(undefined));
// reset our buy state
dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.NONE }));
if (!_.isUndefined(value) && !_.isUndefined(asset) && !_.isUndefined(assetBuyer)) {
// even if it's debounced, give them the illusion it's loading
dispatch(actions.setQuoteRequestStatePending());
// tslint:disable-next-line:no-floating-promises
debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value);
}
},
});
const mergeProps = (
connectedState: ConnectedState,
connectedDispatch: ConnectedDispatch,
ownProps: SelectedAssetAmountInputProps,
): FinalProps => {
return {
...ownProps,
asset: connectedState.asset,
value: connectedState.value,
onChange: (value, asset) => {
connectedDispatch.updateBuyQuote(connectedState.assetBuyer, value, asset);
},
};
};
export const SelectedAssetAmountInput: React.ComponentClass<SelectedAssetAmountInputProps> = connect(
mapStateToProps,
mapDispatchToProps,
mergeProps,
)(AssetAmountInput);
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