Split 0x.js into contract-wrappers, order-watcher but keep 0x.js as a unifying library with the same interface

1 files changed, 6 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>;
+}