1 files changed, 11 insertions, 0 deletions
diff --git a/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_lazy_store.ts b/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_lazy_store.ts
new file mode 100644
index 000000000..38e08b7fe
--- /dev/null
+++ b/packages/order-utils/src/abstract/abstract_balance_and_proxy_allowance_lazy_store.ts
@@ -0,0 +1,11 @@
+import { BigNumber } from '@0xproject/utils';
+
+export abstract class AbstractBalanceAndProxyAllowanceLazyStore {
+    public abstract async getBalanceAsync(assetData: string, userAddress: string): Promise<BigNumber>;
+    public abstract async getProxyAllowanceAsync(assetData: string, userAddress: string): Promise<BigNumber>;
+    public abstract setBalance(assetData: string, userAddress: string, balance: BigNumber): void;
+    public abstract deleteBalance(assetData: string, userAddress: string): void;
+    public abstract setProxyAllowance(assetData: string, userAddress: string, proxyAllowance: BigNumber): void;
+    public abstract deleteProxyAllowance(assetData: string, userAddress: string): void;
+    public abstract deleteAll(): void;
+}