2 files changed, 14 insertions, 0 deletions
diff --git a/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_fetcher.ts b/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_fetcher.ts
new file mode 100644
index 000000000..857c6167f
--- /dev/null
+++ b/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_fetcher.ts
@@ -0,0 +1,6 @@
+import { BigNumber } from '@0xproject/utils';
+
+export abstract class AbstractBalanceAndProxyAllowanceFetcher {
+    public abstract async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
+    public abstract async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
+}
diff --git a/packages/order-utils/src/abstract/abstract_order_filled_cancelled_fetcher.ts b/packages/order-utils/src/abstract/abstract_order_filled_cancelled_fetcher.ts
new file mode 100644
index 000000000..f54bed6f1
--- /dev/null
+++ b/packages/order-utils/src/abstract/abstract_order_filled_cancelled_fetcher.ts
@@ -0,0 +1,8 @@
+import { BigNumber } from '@0xproject/utils';
+
+export abstract class AbstractOrderFilledCancelledFetcher {
+    public abstract async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber>;
+    public abstract async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber>;
+    public abstract async getUnavailableTakerAmountAsync(orderHash: string): Promise<BigNumber>;
+    public abstract getZRXTokenAddress(): string;
+}