Add deprecation warning on EOASignature middleware (#109)

Author: hazim-j

src/preset/middleware/signature.ts

@@ -1,6 +1,17 @@
 import { ethers } from "ethers";
 import { ISigner, UserOperationMiddlewareFn } from "../../types";
 
+export const EOASignature =
+  (signer: ethers.Signer): UserOperationMiddlewareFn =>
+  async (ctx) => {
+    console.warn(
+      "userop.js: Presets.Middleware.EOASignature is deprecated. Replace with Presets.Middleware.signUserOpHash."
+    );
+    ctx.op.signature = await signer.signMessage(
+      ethers.utils.arrayify(ctx.getUserOpHash())
+    );
+  };
+
 export const signUserOpHash =
   (signer: ISigner): UserOperationMiddlewareFn =>
   async (ctx) => {