Add functions to clear stores cache

src/stores/balance_proxy_allowance_lazy_store.ts

@@ -42,6 +42,11 @@ export class BalanceAndProxyAllowanceLazyStore {
         }
         this.balance[tokenAddress][userAddress] = balance;
     }
+    public deleteBalance(tokenAddress: string, userAddress: string): void {
+        if (!_.isUndefined(this.balance[tokenAddress])) {
+            delete this.balance[tokenAddress][userAddress];
+        }
+    }
     public async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
         if (_.isUndefined(this.proxyAllowance[tokenAddress]) ||
             _.isUndefined(this.proxyAllowance[tokenAddress][userAddress])) {
@@ -60,4 +65,9 @@ export class BalanceAndProxyAllowanceLazyStore {
         }
         this.proxyAllowance[tokenAddress][userAddress] = proxyAllowance;
     }
+    public deleteProxyAllowance(tokenAddress: string, userAddress: string): void {
+        if (!_.isUndefined(this.proxyAllowance[tokenAddress])) {
+            delete this.proxyAllowance[tokenAddress][userAddress];
+        }
+    }
 }

src/stores/order_filled_cancelled_lazy_store.ts

@@ -35,6 +35,9 @@ export class OrderFilledCancelledLazyStore {
     public setFilledTakerAmount(orderHash: string, filledTakerAmount: BigNumber): void {
         this.filledTakerAmount[orderHash] = filledTakerAmount;
     }
+    public deleteFilledTakerAmount(orderHash: string): void {
+        delete this.filledTakerAmount[orderHash];
+    }
     public async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
         if (_.isUndefined(this.cancelledTakerAmount[orderHash])) {
             const methodOpts = {
@@ -49,4 +52,7 @@ export class OrderFilledCancelledLazyStore {
     public setCancelledTakerAmount(orderHash: string, cancelledTakerAmount: BigNumber): void {
         this.cancelledTakerAmount[orderHash] = cancelledTakerAmount;
     }
+    public deleteCancelledTakerAmount(orderHash: string): void {
+        delete this.cancelledTakerAmount[orderHash];
+    }
 }