Implement Simple Fetchers

packages/0x.js/src/contract_wrappers/exchange_wrapper.ts

@@ -13,8 +13,8 @@ import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
 import { artifacts } from '../artifacts';
-import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
-import { OrderFilledCancelledLazyStore } from '../stores/order_filled_cancelled_lazy_store';
+import { SimpleBalanceAndAllowanceFetcher } from '../fetchers/simple_balance_and_allowance_fetcher';
+import { SimpleOrderFilledCancelledFetcher } from '../fetchers/simple_order_filled_cancelled_fetcher';
 import {
     BlockRange,
     EventCallback,
@@ -881,11 +881,11 @@ export class ExchangeWrapper extends ContractWrapper {
      * @param   signedOrder   The signedOrder
      */
     public async getOrderStateAsync(signedOrder: SignedOrder): Promise<OrderState> {
-        const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+        const balanceAndProxyAllowanceLazyStore = new SimpleBalanceAndAllowanceFetcher(
             this._tokenWrapper,
             BlockParamLiteral.Latest,
         );
-        const orderFilledCancelledLazyStore = new OrderFilledCancelledLazyStore(this);
+        const orderFilledCancelledLazyStore = new SimpleOrderFilledCancelledFetcher(this);
         const orderStateUtils = new OrderStateUtils(balanceAndProxyAllowanceLazyStore, orderFilledCancelledLazyStore);
         return orderStateUtils.getOrderStateAsync(signedOrder);
     }

packages/0x.js/src/fetchers/simple_balance_and_allowance_fetcher.ts

@@ -0,0 +1,26 @@
+import { BlockParamLiteral } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+
+import {BalanceAndAllowanceFetcher} from '../abstract/balance_and_allowance_fetcher';
+import {TokenWrapper} from '../contract_wrappers/token_wrapper';
+
+export class SimpleBalanceAndAllowanceFetcher implements BalanceAndAllowanceFetcher {
+    private _token: TokenWrapper;
+    private _defaultBlock: BlockParamLiteral;
+    constructor(token: TokenWrapper, defaultBlock: BlockParamLiteral) {
+        this._token = token;
+        this._defaultBlock = defaultBlock;
+    }
+    public async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        return this._token.getBalanceAsync(tokenAddress, userAddress, methodOpts);
+    }
+    public async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        return this._token.getProxyAllowanceAsync(tokenAddress, userAddress, methodOpts);
+    }
+}

packages/0x.js/src/fetchers/simple_order_filled_cancelled_fetcher.ts

@@ -0,0 +1,24 @@
+import { BlockParamLiteral } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+
+import {OrderFilledCancelledFetcher} from '../abstract/order_filled_cancelled_fetcher';
+import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
+
+export class SimpleOrderFilledCancelledFetcher implements OrderFilledCancelledFetcher {
+    private _exchange: ExchangeWrapper;
+    constructor(exchange: ExchangeWrapper) {
+        this._exchange = exchange;
+    }
+    public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: BlockParamLiteral.Pending,
+        };
+        return this._exchange.getFilledTakerAmountAsync(orderHash, methodOpts);
+    }
+    public async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: BlockParamLiteral.Pending,
+        };
+        return this._exchange.getCancelledTakerAmountAsync(orderHash, methodOpts);
+    }
+}

packages/0x.js/src/stores/balance_proxy_allowance_lazy_store.ts

@@ -3,7 +3,7 @@ import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 
 import { TokenWrapper } from '../contract_wrappers/token_wrapper';
-import { BalanceAndAllowanceFetcher } from '../fetchers/balance_and_allowance_fetcher';
+import { BalanceAndAllowanceFetcher } from '../abstract/balance_and_allowance_fetcher';
 
 /**
  * Copy on read store for balances/proxyAllowances of tokens/accounts

packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts

@@ -3,7 +3,7 @@ import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 
 import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
-import { OrderFilledCancelledFetcher } from '../fetchers/order_filled_cancelled_fetcher';
+import { OrderFilledCancelledFetcher } from '../abstract/order_filled_cancelled_fetcher';
 
 /**
  * Copy on read store for filled/cancelled taker amounts

packages/0x.js/src/utils/order_state_utils.ts

@@ -4,8 +4,8 @@ import * as _ from 'lodash';
 
 import { ZeroEx } from '../0x';
 import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
-import { BalanceAndAllowanceFetcher } from '../fetchers/balance_and_allowance_fetcher';
-import { OrderFilledCancelledFetcher } from '../fetchers/order_filled_cancelled_fetcher';
+import { BalanceAndAllowanceFetcher } from '../abstract/balance_and_allowance_fetcher';
+import { OrderFilledCancelledFetcher } from '../abstract/order_filled_cancelled_fetcher';
 import { RemainingFillableCalculator } from '../order_watcher/remaining_fillable_calculator';
 import { ExchangeContractErrs, OrderRelevantState, OrderState, OrderStateInvalid, OrderStateValid } from '../types';