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import { schemas } from '@0xproject/json-schemas';
import { SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import { constants } from '../constants';
import {
AssetBuyerError,
OrderFetcher,
OrderFetcherRequest,
OrderFetcherResponse,
SignedOrderWithRemainingFillableMakerAssetAmount,
} from '../types';
import { assert } from '../utils/assert';
import { orderUtils } from '../utils/order_utils';
export class ProvidedOrderFetcher implements OrderFetcher {
public readonly providedOrders: SignedOrder[];
/**
* Instantiates a new ProvidedOrderFetcher instance
* @param providedOrders An array of objects that conform to SignedOrder to fetch from.
* @return An instance of ProvidedOrderFetcher
*/
constructor(providedOrders: SignedOrder[]) {
assert.doesConformToSchema('providedOrders', providedOrders, schemas.signedOrdersSchema);
this.providedOrders = providedOrders;
}
/**
* Given an object that conforms to OrderFetcherRequest, return the corresponding OrderFetcherResponse that satisfies the request.
* @param orderFetchRequest An instance of OrderFetcherRequest. See type for more information.
* @return An instance of OrderFetcherResponse. See type for more information.
*/
public async fetchOrdersAsync(orderFetchRequest: OrderFetcherRequest): Promise<OrderFetcherResponse> {
assert.isValidOrderFetcherRequest('orderFetchRequest', orderFetchRequest);
const { makerAssetData, takerAssetData } = orderFetchRequest;
const orders = _.filter(this.providedOrders, order => {
return order.makerAssetData === makerAssetData && order.takerAssetData === takerAssetData;
});
return { orders };
}
}
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