fix: coin98 wallet add signMessage method

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

@@ -33,6 +33,16 @@ const mockCoin98WalletOnWindow = () => {
         return "";
       }),
       disconnect: jest.fn(),
+      signMessage: jest.fn().mockReturnValue({
+        signature: Buffer.from([
+          86, 38, 222, 143, 115, 251, 107, 14, 115, 59, 92, 98, 66, 174, 173,
+          124, 209, 189, 191, 180, 89, 25, 125, 254, 97, 240, 178, 98, 65, 70,
+          238, 108, 105, 122, 165, 249, 193, 70, 118, 194, 126, 218, 117, 100,
+          250, 124, 202, 161, 173, 12, 232, 146, 105, 194, 138, 35, 207, 53, 84,
+          218, 45, 220, 10, 4,
+        ]),
+        publicKey,
+      }),
     },
   };
 

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

@@ -6,6 +6,8 @@ import type {
   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 +107,33 @@ const Coin98Wallet: WalletBehaviourFactory<InjectedWallet> = async ({
       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();

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

@@ -1,3 +1,7 @@
+import type {
+  SignedMessage,
+  SignMessageParams,
+} from "@near-wallet-selector/core";
 import type { Signer } from "near-api-js/lib/signer";
 
 interface IConnectParams {
@@ -10,6 +14,7 @@ interface ICoin98Near {
   signer: Signer;
   connect: (params: IConnectParams) => Promise<string>;
   disconnect: () => Promise<void>;
+  signMessage: (params: SignMessageParams) => Promise<SignedMessage>;
 }
 
 export interface InjectedCoin98 {