fix: coin98 wallet add signMessage method

packages/coin98-wallet/src/lib/coin98-wallet.ts

@@ -6,6 +6,8 @@
   Account,
   Optional,
   Transaction,
+  SignMessageParams,
+  SignedMessage,
 } from "@near-wallet-selector/core";
 import { getActiveAccount } from "@near-wallet-selector/core";
 import type { InjectedCoin98 } from "./injected-coin98-wallet";
@@ -105,6 +107,28 @@
       return getAccounts();
     },
 
+    async signMessage({message, nonce, recipient, state}: SignMessageParams): Promise<SignedMessage>{
+      if (!_state.wallet) {
+        throw new Error("Wallet is not installed");
+      }
+
+      logger.log("Coin98:signMessage", {
+        message,
+        nonce,
+        recipient,
+        state,
+      });
+
+      const signature = await _state.wallet.near.signMessage({
+        message,
+        nonce,
+        recipient,
+        state,
+      });
+
+      return signature;
+    },
+
     async signOut() {
       // Ignore if unsuccessful (returns false).
       await _state.wallet.near.disconnect();
@@ -129,7 +153,7 @@
       return provider.sendTransaction(signedTransactions[0]);
     },
 
-    async signAndSendTransactions({ transactions }) {
+    async signAndSendTransactions({ transactions }) {                            
       logger.log("signAndSendTransactions", { transactions });
 
       const signedTransactions = await signTransactions(

packages/coin98-wallet/src/lib/injected-coin98-wallet.ts

@@ -1,3 +1,4 @@
+import { SignedMessage, SignMessageParams } from "@near-wallet-selector/core";
 import type { Signer } from "near-api-js/lib/signer";
 
 interface IConnectParams {
@@ -10,6 +11,7 @@
   signer: Signer;
   connect: (params: IConnectParams) => Promise<string>;
   disconnect: () => Promise<void>;
+  signMessage: (params: SignMessageParams) => Promise<SignedMessage>;
 }
 
 export interface InjectedCoin98 {