2 files changed, 51 insertions, 1 deletions
diff --git a/packages/forwarder-helper/src/forwarder_helper_impl.ts b/packages/forwarder-helper/src/forwarder_helper_impl.ts
index e69de29bb..1069bca73 100644
--- a/packages/forwarder-helper/src/forwarder_helper_impl.ts
+++ b/packages/forwarder-helper/src/forwarder_helper_impl.ts
@@ -0,0 +1,50 @@
+import { SignedOrder } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+
+import {
+    ForwarderHelper,
+    MarketBuyOrdersInfo,
+    MarketBuyOrdersInfoRequest,
+    MarketSellOrdersInfo,
+    MarketSellOrdersInfoRequest,
+} from './types';
+
+export class ForwarderHelperImpl implements ForwarderHelper {
+    private _orders: SignedOrder[];
+    private _feeOrders: SignedOrder[];
+    private _remainingFillableMakerAssetAmountsIfExists?: BigNumber[];
+    private _remainingFillableFeeAmountsIfExists?: BigNumber[];
+    constructor(
+        orders: SignedOrder[],
+        feeOrders: SignedOrder[] = [] as SignedOrder[],
+        remainingFillableMakerAssetAmounts?: BigNumber[],
+        remainingFillableFeeAmounts?: BigNumber[],
+    ) {
+        this._orders = orders;
+        this._feeOrders = feeOrders;
+        this._remainingFillableMakerAssetAmountsIfExists = remainingFillableMakerAssetAmounts;
+        this._remainingFillableFeeAmountsIfExists = remainingFillableFeeAmounts;
+    }
+    public getMarketBuyOrdersInfo(request: MarketBuyOrdersInfoRequest): MarketBuyOrdersInfo {
+        const { makerAssetFillAmount, feePercentage, acceptableEthAmountRange } = request;
+        return {
+            makerAssetFillAmount,
+            orders: this._orders,
+            feeOrders: this._feeOrders,
+            minEthAmount: new BigNumber(0),
+            maxEthAmount: new BigNumber(0),
+            feePercentage,
+        };
+    }
+    public getMarketSellOrdersInfo(request: MarketSellOrdersInfoRequest): MarketSellOrdersInfo {
+        const { ethAmount, feePercentage, acceptableFillAmountRange } = request;
+        return {
+            ethAmount,
+            orders: this._orders,
+            feeOrders: this._feeOrders,
+            minFillAmount: new BigNumber(0),
+            maxFillAmount: new BigNumber(0),
+            feePercentage,
+        };
+    }
+}
diff --git a/packages/forwarder-helper/src/types.ts b/packages/forwarder-helper/src/types.ts
index 23eaa1281..c6d4083a9 100644
--- a/packages/forwarder-helper/src/types.ts
+++ b/packages/forwarder-helper/src/types.ts
@@ -46,9 +46,9 @@ export interface MarketBuyOrdersInfo {
     makerAssetFillAmount: BigNumber;
     orders: SignedOrder[];
     feeOrders: SignedOrder[];
-    feePercentage?: BigNumber;
     minEthAmount: BigNumber;
     maxEthAmount: BigNumber;
+    feePercentage?: BigNumber;
 }
 
 /**