feat: Add support for signMessage in Sender

packages/sender/src/lib/injected-sender.ts

@@ -2,7 +2,11 @@
 
 // Empty string if we haven't signed in before.
 import type { Account, providers } from "near-api-js";
-import type { AccountImportData } from "@near-wallet-selector/core";
+import type {
+  AccountImportData,
+  SignedMessage,
+  SignMessageParams,
+} from "@near-wallet-selector/core";
 
 export interface AccessKey {
   publicKey: {
@@ -104,6 +108,15 @@ interface SignAndSendTransactionsResponse {
   type: "sender-wallet-extensionResult";
 }
 
+interface SignMessageResponse {
+  actionType: "DAPP/POPUP_RESPONSE";
+  method: "signMessage";
+  notificationId: number;
+  error?: string;
+  response?: SignedMessage;
+  type: "sender-wallet-extensionResult";
+}
+
 interface Transaction {
   receiverId: string;
   actions: Array<Action>;
@@ -150,4 +163,5 @@ export interface InjectedSender {
     params: RequestSignTransactionsParams
   ) => Promise<SignAndSendTransactionsResponse>;
   batchImport: (params: batchImportParams) => Promise<unknown>;
+  signMessage: (params: SignMessageParams) => Promise<SignMessageResponse>;
 }

packages/sender/src/lib/sender.spec.ts

@@ -67,6 +67,14 @@ const mockSenderOnWindow = () => {
         ),
       })
     ),
+    signMessage: jest.fn().mockResolvedValue({
+      error: undefined,
+      response: {
+        accountId,
+        publicKey: "ed25519:test",
+        signature: "testSignature",
+      },
+    }),
     batchImport: jest.fn(),
   };
 
@@ -170,3 +178,24 @@ describe("importAccountsInSecureContext", () => {
     }
   });
 });
+
+describe("signMessage", () => {
+  it("sign message", async () => {
+    const { wallet, injectedSender } = await createSenderWallet();
+
+    const message = {
+      message: "test message",
+      nonce: Buffer.from("30990309-30990309-390A303-292090"),
+      recipient: "test.app",
+    };
+
+    const result = await wallet.signMessage!(message);
+
+    expect(injectedSender?.signMessage).toHaveBeenCalled();
+    expect(result).toEqual({
+      accountId,
+      publicKey: "ed25519:test",
+      signature: "testSignature",
+    });
+  });
+});

packages/sender/src/lib/sender.ts

@@ -252,6 +252,20 @@ const Sender: WalletBehaviourFactory<InjectedWallet> = async ({
       };
     },
 
+    async signMessage(message) {
+      return _state.wallet.signMessage(message).then((res) => {
+        if (res.error) {
+          throw new Error(res.error);
+        }
+
+        if (!res?.response) {
+          throw new Error("Invalid response");
+        }
+
+        return res.response;
+      });
+    },
+
     async signAndSendTransaction({ signerId, receiverId, actions }) {
       logger.log("signAndSendTransaction", { signerId, receiverId, actions });