1 files changed, 10 insertions, 0 deletions
diff --git a/packages/contracts/src/abstract/abstract_asset_wrapper.ts b/packages/contracts/src/abstract/abstract_asset_wrapper.ts
new file mode 100644
index 000000000..d7ab58fea
--- /dev/null
+++ b/packages/contracts/src/abstract/abstract_asset_wrapper.ts
@@ -0,0 +1,10 @@
+import { BigNumber } from '@0xproject/utils';
+
+export abstract class AbstractAssetWrapper {
+    public abstract getProxyId(): number;
+    public abstract async setBalancesAndAllowancesAsync(): Promise<void>;
+    public abstract async getBalanceAsync(owner: string, assetData: string): Promise<BigNumber>;
+    public abstract async getProxyAllowanceAsync(owner: string, assetData: string): Promise<BigNumber>;
+    public abstract getTokenOwnerAddresses(): string[];
+    public abstract getTokenAddresses(): string[];
+}