1 files changed, 4 insertions, 0 deletions
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 419611695..442fbb2d6 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -1,5 +1,9 @@
 import { BigNumber } from 'bignumber.js';
 
+export interface Provider {
+    sendAsync(payload: JSONRPCRequestPayload, callback: (err: Error, result: JSONRPCResponsePayload) => void): void;
+}
+
 export type ContractAbi = AbiDefinition[];
 
 export type AbiDefinition = FunctionAbi | EventAbi;