Implement Simple Fetchers

4 files changed, 50 insertions, 12 deletions

diff --git a/packages/0x.js/src/fetchers/balance_and_allowance_fetcher.ts b/packages/0x.js/src/fetchers/balance_and_allowance_fetcher.ts
deleted file mode 100644
index f7b1183f1..000000000
--- a/packages/0x.js/src/fetchers/balance_and_allowance_fetcher.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import { BigNumber } from '@0xproject/utils';
-
-export abstract class BalanceAndAllowanceFetcher {
-    public abstract async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
-    public abstract async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
-}
diff --git a/packages/0x.js/src/fetchers/order_filled_cancelled_fetcher.ts b/packages/0x.js/src/fetchers/order_filled_cancelled_fetcher.ts
deleted file mode 100644
index 81ae04b9c..000000000
--- a/packages/0x.js/src/fetchers/order_filled_cancelled_fetcher.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import { BigNumber } from '@0xproject/utils';
-
-export abstract class OrderFilledCancelledFetcher {
-    public abstract async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber>;
-    public abstract async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber>;
-}
diff --git a/packages/0x.js/src/fetchers/simple_balance_and_allowance_fetcher.ts b/packages/0x.js/src/fetchers/simple_balance_and_allowance_fetcher.ts
new file mode 100644
index 000000000..2aa1cc2b7
--- /dev/null
+++ b/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);
+    }
+}
diff --git a/packages/0x.js/src/fetchers/simple_order_filled_cancelled_fetcher.ts b/packages/0x.js/src/fetchers/simple_order_filled_cancelled_fetcher.ts
new file mode 100644
index 000000000..e24f02726
--- /dev/null
+++ b/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);
+    }
+}