diff --git a/package.json b/package.json
index 1ff708107..db74933ec 100644
--- a/package.json
+++ b/package.json
@@ -69,6 +69,7 @@
     "lint": "nx workspace-lint && nx run-many --target=lint --all --parallel",
     "lint:fix": "nx run-many --target=lint --all --fix",
     "serve:react": "nx serve react --host=0.0.0.0",
+    "build:react": "nx build react --host=0.0.0.0",
     "serve:angular": "nx serve angular",
     "prepack": "yarn build:core && yarn build:all",
     "test": "nx run-many --target=test --all",
@@ -92,6 +93,7 @@
     "@meteorwallet/sdk": "^1.0.9",
     "@mintbase-js/wallet": "0.6.0-beta.3",
     "@near-snap/sdk": "^0.6.0",
+    "@near-wallet-selector/modal-ui": "^8.9.8",
     "@peersyst/near-mobile-signer": "^1.0.10",
     "@ramper/near": "^0.0.30",
     "@walletconnect/modal": "^2.6.2",
diff --git a/packages/coin98-wallet/src/lib/coin98-wallet.spec.ts b/packages/coin98-wallet/src/lib/coin98-wallet.spec.ts
index c60fcf635..90507b0c3 100644
--- a/packages/coin98-wallet/src/lib/coin98-wallet.spec.ts
+++ b/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,
+      }),
     },
   };
 
diff --git a/packages/coin98-wallet/src/lib/coin98-wallet.ts b/packages/coin98-wallet/src/lib/coin98-wallet.ts
index 5ce20c3a5..a2479d230 100644
--- a/packages/coin98-wallet/src/lib/coin98-wallet.ts
+++ b/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();
diff --git a/packages/coin98-wallet/src/lib/injected-coin98-wallet.ts b/packages/coin98-wallet/src/lib/injected-coin98-wallet.ts
index 72eff4f2e..c500ba26a 100644
--- a/packages/coin98-wallet/src/lib/injected-coin98-wallet.ts
+++ b/packages/coin98-wallet/src/lib/injected-coin98-wallet.ts
@@ -1,3 +1,4 @@
+import type { SignedMessage, SignMessageParams } from "@near-wallet-selector/core";
 import type { Signer } from "near-api-js/lib/signer";
 
 interface IConnectParams {
@@ -10,6 +11,7 @@ interface ICoin98Near {
   signer: Signer;
   connect: (params: IConnectParams) => Promise<string>;
   disconnect: () => Promise<void>;
+  signMessage: (params: SignMessageParams) => Promise<SignedMessage>;
 }
 
 export interface InjectedCoin98 {