diff options
Diffstat (limited to 'packages/asset-buyer/src/order_fetchers/provided_order_fetcher.ts')
-rw-r--r-- | packages/asset-buyer/src/order_fetchers/provided_order_fetcher.ts | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/packages/asset-buyer/src/order_fetchers/provided_order_fetcher.ts b/packages/asset-buyer/src/order_fetchers/provided_order_fetcher.ts new file mode 100644 index 000000000..7a7ffcdfe --- /dev/null +++ b/packages/asset-buyer/src/order_fetchers/provided_order_fetcher.ts @@ -0,0 +1,32 @@ +import { schemas } from '@0xproject/json-schemas'; +import { SignedOrder } from '@0xproject/types'; +import * as _ from 'lodash'; + +import { OrderFetcher, OrderFetcherRequest, OrderFetcherResponse } from '../types'; +import { assert } from '../utils/assert'; + +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 }; + } +} |