diff options
Diffstat (limited to 'packages/asset-buyer/src/order_providers/basic_order_provider.ts')
-rw-r--r-- | packages/asset-buyer/src/order_providers/basic_order_provider.ts | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/packages/asset-buyer/src/order_providers/basic_order_provider.ts b/packages/asset-buyer/src/order_providers/basic_order_provider.ts new file mode 100644 index 000000000..76685f27a --- /dev/null +++ b/packages/asset-buyer/src/order_providers/basic_order_provider.ts @@ -0,0 +1,41 @@ +import { schemas } from '@0x/json-schemas'; +import { SignedOrder } from '@0x/types'; +import * as _ from 'lodash'; + +import { OrderProvider, OrderProviderRequest, OrderProviderResponse } from '../types'; +import { assert } from '../utils/assert'; + +export class BasicOrderProvider implements OrderProvider { + public readonly orders: SignedOrder[]; + /** + * Instantiates a new BasicOrderProvider instance + * @param orders An array of objects that conform to SignedOrder to fetch from. + * @return An instance of BasicOrderProvider + */ + constructor(orders: SignedOrder[]) { + assert.doesConformToSchema('orders', orders, schemas.signedOrdersSchema); + this.orders = orders; + } + /** + * Given an object that conforms to OrderFetcherRequest, return the corresponding OrderProviderResponse that satisfies the request. + * @param orderProviderRequest An instance of OrderFetcherRequest. See type for more information. + * @return An instance of OrderProviderResponse. See type for more information. + */ + public async getOrdersAsync(orderProviderRequest: OrderProviderRequest): Promise<OrderProviderResponse> { + assert.isValidOrderProviderRequest('orderProviderRequest', orderProviderRequest); + const { makerAssetData, takerAssetData } = orderProviderRequest; + const orders = _.filter(this.orders, order => { + return order.makerAssetData === makerAssetData && order.takerAssetData === takerAssetData; + }); + return { orders }; + } + /** + * Given a taker asset data string, return all availabled paired maker asset data strings. + * @param takerAssetData A string representing the taker asset data. + * @return An array of asset data strings that can be purchased using takerAssetData. + */ + public async getAvailableMakerAssetDatasAsync(takerAssetData: string): Promise<string[]> { + const ordersWithTakerAssetData = _.filter(this.orders, { takerAssetData }); + return _.map(ordersWithTakerAssetData, order => order.makerAssetData); + } +} |