diff --git a/holo-key-manager-extension/build-scripts/fixBackgroundScriptForSigning.cjs b/holo-key-manager-extension/build-scripts/fixBackgroundScriptForSigning.cjs
new file mode 100644
index 0000000..6dbd975
--- /dev/null
+++ b/holo-key-manager-extension/build-scripts/fixBackgroundScriptForSigning.cjs
@@ -0,0 +1,31 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+// replaceForFirefox.cjs
+const fs = require('fs');
+const path = require('path');
+const backgroundScriptPath = path.resolve(__dirname, '../build/scripts/background.js');
+
+fs.readFile(backgroundScriptPath, 'utf8', (err, data) => {
+	if (err) {
+		console.error('Error reading the background script file:', err);
+		return;
+	}
+
+	let modifiedData = data.replace(/global\./g, 'self.');
+
+	modifiedData = modifiedData.replace(
+		/var normalize = bufferUtil\.normalize;/g,
+		`var normalize = function (buffer) {
+	if (Buffer.isBuffer(buffer)) return buffer;
+	return Buffer.from(buffer.buffer, buffer.byteOffset, buffer.byteLength);
+};`
+	);
+
+	fs.writeFile(backgroundScriptPath, modifiedData, 'utf8', (err) => {
+		if (err) {
+			console.error('Error writing the modified background script file:', err);
+			return;
+		}
+
+		console.log('Background script file modified successfully.');
+	});
+});
diff --git a/holo-key-manager-extension/package.json b/holo-key-manager-extension/package.json
index f3c1e85..a36dedc 100644
--- a/holo-key-manager-extension/package.json
+++ b/holo-key-manager-extension/package.json
@@ -3,13 +3,15 @@
 	"version": "0.0.3",
 	"private": true,
 	"scripts": {
-		"build": "pnpm build:vite && pnpm build:script && pnpm build:removeInline",
-		"buildDev": "pnpm build:vite && pnpm build:script && pnpm build:removeInline && pnpm build:buildForFirefoxDev",
+		"buildCommon": "pnpm build:vite && pnpm build:script && pnpm build:fixBackgroundScriptForSigning && pnpm build:removeInline",
+		"build": "pnpm buildCommon",
+		"buildDev": "pnpm buildCommon && pnpm build:buildForFirefoxDev",
 		"build:vite": "vite build",
 		"build:script": "cd scripts && pnpm build && cd ..",
 		"build:removeInline": "node build-scripts/removeInlineScript.cjs",
 		"build:replaceForFirefox": "node build-scripts/replaceForFirefox.cjs",
 		"build:buildForFirefoxDev": "node build-scripts/devFirefox.cjs",
+		"build:fixBackgroundScriptForSigning": "node build-scripts/fixBackgroundScriptForSigning.cjs",
 		"preview": "vite preview",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
diff --git a/holo-key-manager-extension/scripts/background.ts b/holo-key-manager-extension/scripts/background.ts
index 6593a83..e783ce6 100644
--- a/holo-key-manager-extension/scripts/background.ts
+++ b/holo-key-manager-extension/scripts/background.ts
@@ -8,6 +8,7 @@ import {
 	SENDER_EXTENSION,
 	SIGN_IN,
 	SIGN_MESSAGE,
+	SIGN_MESSAGE_SUCCESS,
 	SIGN_OUT,
 	SIGN_OUT_SUCCESS,
 	SIGN_UP,
@@ -22,6 +23,12 @@ import {
 	type WindowProperties
 } from '@shared/types';
 
+import { signMessageLogic } from './helpers';
+
+// Important: This script is modified by a
+// post-build script (build-scripts/fixBackgroundScriptForSigning.cjs)
+// which may alter some of its intended behavior.
+
 let windowId: number | undefined;
 
 type SendResponse = (response?: Message) => void;
@@ -149,12 +156,14 @@ const processMessage = async (message: Message, sendResponse: SendResponse) => {
 						})
 					: sendResponseWithSender({ action: NO_KEY_FOR_HAPP });
 			case SIGN_MESSAGE:
-				return (await isAuthenticated(parsedMessage.data.payload.happId))
-					? createOrUpdateDataResponseWindow(sendResponseWithSender, {
-							action: parsedMessage.data.action,
-							payload: parsedMessage.data.payload
-						})
-					: sendResponseWithSender({ action: NOT_AUTHENTICATED });
+				if (await isAuthenticated(parsedMessage.data.payload.happId)) {
+					const signedMessage = await signMessageLogic(parsedMessage.data.payload);
+					return sendResponseWithSender({
+						action: SIGN_MESSAGE_SUCCESS,
+						payload: signedMessage
+					});
+				}
+				return sendResponseWithSender({ action: NOT_AUTHENTICATED });
 			case SIGN_OUT:
 				signOut(parsedMessage.data.payload.happId);
 				return sendResponseWithSender({ action: SIGN_OUT_SUCCESS });
diff --git a/holo-key-manager-extension/scripts/helpers.ts b/holo-key-manager-extension/scripts/helpers.ts
new file mode 100644
index 0000000..c794264
--- /dev/null
+++ b/holo-key-manager-extension/scripts/helpers.ts
@@ -0,0 +1,61 @@
+import { AUTHENTICATED_APPS_LIST, SESSION } from '@shared/const';
+import { base64ToUint8Array, uint8ArrayToBase64 } from '@shared/helpers';
+import { getSessionKey, storageService } from '@shared/services';
+import {
+	AuthenticatedAppsListSchema,
+	type MessageToSign,
+	SuccessMessageSignedSchema
+} from '@shared/types';
+// @ts-expect-error no types for hcSeedBundle
+import * as hcSeedBundle from 'hcSeedBundle';
+
+export const signMessageLogic = async ({ message, happId }: MessageToSign) => {
+	const authenticatedAppsListData = await storageService.getWithoutCallback({
+		key: AUTHENTICATED_APPS_LIST,
+		area: SESSION
+	});
+
+	const parsedAuthenticatedAppsListData =
+		AuthenticatedAppsListSchema.safeParse(authenticatedAppsListData);
+
+	if (!parsedAuthenticatedAppsListData.success) {
+		throw new Error('Failed to parse authenticated apps list data');
+	}
+
+	const index = parsedAuthenticatedAppsListData.data[happId];
+	const sessionKey = await getSessionKey();
+
+	if (!sessionKey.success) {
+		throw new Error('Session data not found');
+	}
+
+	await hcSeedBundle.seedBundleReady;
+
+	const cipherList = hcSeedBundle.UnlockedSeedBundle.fromLocked(
+		base64ToUint8Array(sessionKey.data)
+	);
+
+	if (!(cipherList[0] instanceof hcSeedBundle.LockedSeedCipherPwHash)) {
+		throw new Error('Expecting PwHash');
+	}
+
+	const pw = new TextEncoder().encode(SESSION);
+	const keyUnlocked = cipherList[0].unlock(hcSeedBundle.parseSecret(pw));
+
+	const appKey = keyUnlocked.derive(index);
+
+	const signedMessage = appKey.sign(message);
+
+	keyUnlocked.zero();
+	appKey.zero();
+
+	const validatedSchema = SuccessMessageSignedSchema.safeParse({
+		signature: uint8ArrayToBase64(signedMessage)
+	});
+
+	if (!validatedSchema.success) {
+		throw new Error('Invalid message');
+	}
+
+	return validatedSchema.data;
+};
diff --git a/holo-key-manager-extension/scripts/package.json b/holo-key-manager-extension/scripts/package.json
index 7e8e0d9..78c6a88 100644
--- a/holo-key-manager-extension/scripts/package.json
+++ b/holo-key-manager-extension/scripts/package.json
@@ -5,5 +5,13 @@
   "type": "module",
   "scripts": {
     "build": "rollup -c"
+  },
+  "devDependencies": {
+    "@rollup/plugin-commonjs": "^25.0.7",
+    "@rollup/plugin-inject": "^5.0.5",
+    "@rollup/plugin-node-resolve": "^15.2.3",
+    "@rollup/plugin-replace": "^5.0.5",
+    "buffer": "^6.0.3",
+    "rollup-plugin-node-polyfills": "^0.2.1"
   }
 }
diff --git a/holo-key-manager-extension/scripts/rollup.config.js b/holo-key-manager-extension/scripts/rollup.config.js
index 2188eb5..fbbb756 100644
--- a/holo-key-manager-extension/scripts/rollup.config.js
+++ b/holo-key-manager-extension/scripts/rollup.config.js
@@ -1,4 +1,8 @@
-import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import inject from '@rollup/plugin-inject';
+import { nodeResolve } from '@rollup/plugin-node-resolve';
+import replace from '@rollup/plugin-replace';
+import nodePolyfills from 'rollup-plugin-node-polyfills';
 import tscAlias from 'rollup-plugin-tsc-alias';
 import typescript from 'rollup-plugin-typescript2';
 
@@ -8,7 +12,20 @@ const createConfig = (input, file) => ({
 		file,
 		format: 'esm'
 	},
-	plugins: [tscAlias(), typescript(), resolve()]
+	plugins: [
+		tscAlias(),
+		nodePolyfills(),
+		nodeResolve({ preferBuiltins: true }),
+		commonjs(),
+		inject({
+			Buffer: ['buffer', 'Buffer']
+		}),
+		replace({
+			preventAssignment: true,
+			global: 'self'
+		}),
+		typescript()
+	]
 });
 
 export default [
diff --git a/holo-key-manager-extension/scripts/tsconfig.json b/holo-key-manager-extension/scripts/tsconfig.json
index fb03610..31e0b3a 100644
--- a/holo-key-manager-extension/scripts/tsconfig.json
+++ b/holo-key-manager-extension/scripts/tsconfig.json
@@ -3,5 +3,5 @@
 	"compilerOptions": {
 		"outDir": "../build"
 	},
-	"include": ["background.ts", "content.ts"]
+	"include": ["background.ts", "content.ts", "helpers.ts"]
 }
diff --git a/holo-key-manager-extension/src/lib/helpers/queries.ts b/holo-key-manager-extension/src/lib/helpers/queries.ts
index 5855abc..96296d3 100644
--- a/holo-key-manager-extension/src/lib/helpers/queries.ts
+++ b/holo-key-manager-extension/src/lib/helpers/queries.ts
@@ -7,19 +7,16 @@ import {
 	BACKGROUND_SCRIPT_RECEIVED_DATA,
 	LOCAL,
 	PASSWORD,
-	SESSION,
-	SESSION_STORAGE_KEY
+	SESSION
 } from '$shared/const';
 import { parseMessageSchema, uint8ArrayToBase64 } from '$shared/helpers';
-import { sendMessage, storageService } from '$shared/services';
+import { getSessionKey, sendMessage, storageService } from '$shared/services';
 import {
 	AppsListSchema,
 	AuthenticatedAppsListSchema,
 	HashSaltSchema,
 	type Message,
-	PubKeySchema,
-	SessionStateSchema,
-	SuccessMessageSignedSchema
+	PubKeySchema
 } from '$shared/types';
 
 export const handleSuccess = (queryClient: QueryClient, queryKey: string[]) => () =>
@@ -33,14 +30,6 @@ export const getPassword = async () => {
 	return HashSaltSchema.safeParse(data);
 };
 
-export const getSessionKey = async () => {
-	const data = await storageService.getWithoutCallback({
-		key: SESSION_STORAGE_KEY,
-		area: SESSION
-	});
-	return SessionStateSchema.safeParse(data);
-};
-
 export const fetchAndParseAppsList = async () => {
 	const appsListData = await storageService.getWithoutCallback({
 		key: APPS_LIST,
@@ -103,29 +92,3 @@ export const deriveSignPubKey = async (newIndex: number) => {
 
 	return validatedSchema.data;
 };
-
-export const signMessage = async (message: string, index: number) => {
-	const sessionKey = await getSessionKey();
-
-	if (!sessionKey.success) {
-		throw new Error('Session data not found');
-	}
-
-	const keyUnlocked = await unlockKey(sessionKey.data, SESSION);
-	const appKey = keyUnlocked.derive(index);
-
-	const signedMessage = appKey.sign(message);
-
-	keyUnlocked.zero();
-	appKey.zero();
-
-	const validatedSchema = SuccessMessageSignedSchema.safeParse({
-		signature: uint8ArrayToBase64(signedMessage)
-	});
-
-	if (!validatedSchema.success) {
-		throw new Error('Invalid message');
-	}
-
-	return validatedSchema.data;
-};
diff --git a/holo-key-manager-extension/src/lib/queries/applicationQueries.ts b/holo-key-manager-extension/src/lib/queries/applicationQueries.ts
index 9048059..9f33ca1 100644
--- a/holo-key-manager-extension/src/lib/queries/applicationQueries.ts
+++ b/holo-key-manager-extension/src/lib/queries/applicationQueries.ts
@@ -5,8 +5,7 @@ import {
 	fetchAndParseAppsList,
 	fetchAuthenticatedAppsList,
 	handleSuccess,
-	sendMessageAndHandleResponse,
-	signMessage
+	sendMessageAndHandleResponse
 } from '$helpers';
 import {
 	APPLICATION_KEYS,
@@ -17,7 +16,6 @@ import {
 	SENDER_EXTENSION,
 	SESSION,
 	SIGN_IN_SUCCESS,
-	SIGN_MESSAGE_SUCCESS,
 	SIGN_UP_SUCCESS
 } from '$shared/const';
 import { storageService } from '$shared/services';
@@ -121,26 +119,6 @@ export function createSignInWithKeyMutation(queryClient: QueryClient) {
 	});
 }
 
-export function createMessageMutation() {
-	return createMutation({
-		mutationFn: async (signMessageData: { happId: string; message: string }) => {
-			const { happId, message } = signMessageData;
-
-			const currentAuthenticatedAppsList = await fetchAuthenticatedAppsList(happId);
-
-			const index = currentAuthenticatedAppsList[happId];
-
-			const signedMessage = await signMessage(message, index);
-
-			await sendMessageAndHandleResponse({
-				sender: SENDER_EXTENSION,
-				action: SIGN_MESSAGE_SUCCESS,
-				payload: signedMessage
-			});
-		}
-	});
-}
-
 export function createSignedInApplicationKeysIndexQuery() {
 	return (happId: string) => {
 		return createQuery({
diff --git a/holo-key-manager-extension/src/lib/queries/extensionQueries.ts b/holo-key-manager-extension/src/lib/queries/extensionQueries.ts
index 6b62433..c2c1897 100644
--- a/holo-key-manager-extension/src/lib/queries/extensionQueries.ts
+++ b/holo-key-manager-extension/src/lib/queries/extensionQueries.ts
@@ -1,9 +1,9 @@
 import { createMutation, createQuery, QueryClient } from '@tanstack/svelte-query';
 
-import { getSessionKey, handleSuccess } from '$helpers';
+import { handleSuccess } from '$helpers';
 import { unlockKey } from '$services';
 import { DEVICE_KEY, LOCAL, PASSWORD, SESSION_DATA_KEY, SETUP_KEY } from '$shared/const';
-import { isSetupComplete, storageService } from '$shared/services';
+import { getSessionKey, isSetupComplete, storageService } from '$shared/services';
 import { EncryptedDeviceKeySchema, HashSaltSchema } from '$shared/types';
 import { deviceKeyContentStore, passphraseStore } from '$stores';
 
diff --git a/holo-key-manager-extension/src/lib/queries/index.ts b/holo-key-manager-extension/src/lib/queries/index.ts
index f9be748..ef64b65 100644
--- a/holo-key-manager-extension/src/lib/queries/index.ts
+++ b/holo-key-manager-extension/src/lib/queries/index.ts
@@ -3,7 +3,6 @@ import { useQueryClient } from '@tanstack/svelte-query';
 import {
 	createApplicationKeyMutation,
 	createApplicationKeysQuery,
-	createMessageMutation,
 	createSignInWithKeyMutation
 } from './applicationQueries';
 import {
@@ -31,7 +30,6 @@ export function appQueries() {
 	const setupPasswordQuery = createSetupPasswordQuery();
 	const applicationKeysQueryFunction = createApplicationKeysQuery();
 	const signInMutation = createSignInMutation(queryClient);
-	const messageMutation = createMessageMutation();
 	const storeDeviceKey = createStoreDeviceKey(queryClient);
 	const recoverDeviceKeyMutation = createRecoverDeviceKeyMutation();
 	const applicationKeyMutation = createApplicationKeyMutation(queryClient);
@@ -49,7 +47,6 @@ export function appQueries() {
 		recoverDeviceKeyMutation,
 		passwordAndStoreDeviceKeyMutation,
 		applicationKeysQueryFunction,
-		signInWithKeyMutation,
-		messageMutation
+		signInWithKeyMutation
 	};
 }
diff --git a/holo-key-manager-extension/src/lib/services/index.ts b/holo-key-manager-extension/src/lib/services/index.ts
index bfd61b7..3fff6c8 100644
--- a/holo-key-manager-extension/src/lib/services/index.ts
+++ b/holo-key-manager-extension/src/lib/services/index.ts
@@ -1 +1 @@
-export * from './generate-keys';
+export * from './manage-keys';
diff --git a/holo-key-manager-extension/src/lib/services/generate-keys.ts b/holo-key-manager-extension/src/lib/services/manage-keys.ts
similarity index 100%
rename from holo-key-manager-extension/src/lib/services/generate-keys.ts
rename to holo-key-manager-extension/src/lib/services/manage-keys.ts
diff --git a/holo-key-manager-extension/src/lib/stores/keys-store.ts b/holo-key-manager-extension/src/lib/stores/keys-store.ts
index 69c6b59..bd0e0fb 100644
--- a/holo-key-manager-extension/src/lib/stores/keys-store.ts
+++ b/holo-key-manager-extension/src/lib/stores/keys-store.ts
@@ -1,9 +1,8 @@
 import { writable } from 'svelte/store';
 
+import { generateKeys } from '$services';
 import type { KeysState } from '$types';
 
-import { generateKeys } from '../services/generate-keys';
-
 const initKeysStore = () => {
 	const initialState: KeysState = {
 		keys: {
diff --git a/holo-key-manager-extension/src/routes/+page.svelte b/holo-key-manager-extension/src/routes/+page.svelte
index d90a055..48df6f9 100644
--- a/holo-key-manager-extension/src/routes/+page.svelte
+++ b/holo-key-manager-extension/src/routes/+page.svelte
@@ -19,7 +19,7 @@
 	onMount(async () => {
 		if (isChromePermissionsSafe()) {
 			const permissions = await chrome.permissions.getAll();
-			permissionGranted = permissions.origins?.includes('*://localhost/*') ?? false;
+			permissionGranted = permissions.origins?.includes('<all_urls>') ?? false;
 		}
 	});
 
diff --git a/holo-key-manager-extension/src/routes/webapp-extension/setup/+page.svelte b/holo-key-manager-extension/src/routes/webapp-extension/setup/+page.svelte
index fa12161..8639309 100644
--- a/holo-key-manager-extension/src/routes/webapp-extension/setup/+page.svelte
+++ b/holo-key-manager-extension/src/routes/webapp-extension/setup/+page.svelte
@@ -4,7 +4,7 @@
 	import { goto } from '$app/navigation';
 	import { ActionPage } from '$components';
 	import { extractDetailsFromUrl } from '$helpers';
-	import { SIGN_IN, SIGN_MESSAGE } from '$shared/const';
+	import { SIGN_IN } from '$shared/const';
 
 	const submitFormData = () => {
 		goto(`create-key?${new URLSearchParams(window.location.search)}`);
@@ -14,9 +14,6 @@
 		if ($extractDetailsFromUrl.action === SIGN_IN) {
 			goto(`select-key-to-login?${new URLSearchParams(window.location.search)}`);
 		}
-		if ($extractDetailsFromUrl.action === SIGN_MESSAGE) {
-			goto(`sign-message?${new URLSearchParams(window.location.search)}`);
-		}
 	});
 </script>
 
diff --git a/holo-key-manager-extension/src/routes/webapp-extension/sign-message/+page.svelte b/holo-key-manager-extension/src/routes/webapp-extension/sign-message/+page.svelte
deleted file mode 100644
index 87425a3..0000000
--- a/holo-key-manager-extension/src/routes/webapp-extension/sign-message/+page.svelte
+++ /dev/null
@@ -1,30 +0,0 @@
-<script lang="ts">
-	import { Button, LogoCloseBar } from '$components';
-	import { dismissWindow, extractDetailsFromUrl } from '$helpers';
-	import { appQueries } from '$queries';
-
-	const { messageMutation } = appQueries();
-</script>
-
-<div class="mt-4 flex h-screen flex-col">
-	<LogoCloseBar />
-	<div class="flex flex-col">
-		<h1 class="mx-auto mt-4 text-center text-2xl font-bold">Sign message</h1>
-	</div>
-	<div class="mt-auto">
-		<Button
-			label="Click to sign a message"
-			onClick={() =>
-				$messageMutation.mutate(
-					{
-						happId: $extractDetailsFromUrl.happId,
-						message: $extractDetailsFromUrl.message
-					},
-					{
-						onSuccess: dismissWindow
-					}
-				)}
-			extraBottomMargin
-		/>
-	</div>
-</div>
diff --git a/holo-key-manager-extension/static/manifest.json b/holo-key-manager-extension/static/manifest.json
index 1911870..1cf6882 100644
--- a/holo-key-manager-extension/static/manifest.json
+++ b/holo-key-manager-extension/static/manifest.json
@@ -1,7 +1,7 @@
 {
 	"name": "Holo key manager",
 	"description": "A browser extension to manage holo keys",
-	"version": "0.0.47",
+	"version": "0.0.48",
 	"manifest_version": 3,
 	"action": {
 		"default_title": "Holo key manager",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d2b1b91..0abff9a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -128,11 +128,7 @@ importers:
         specifier: ^5.2.4
         version: 5.2.4
 
-  holo-key-manager-js-client:
-    dependencies:
-      dotenv:
-        specifier: ^16.4.5
-        version: 16.4.5
+  holo-key-manager-js-client: {}
 
   shared:
     dependencies:
@@ -1364,11 +1360,6 @@ packages:
       esutils: 2.0.3
     dev: true
 
-  /dotenv@16.4.5:
-    resolution: {integrity: sha512-ZmdL2rui+eB2YwhsWzjInR8LldtZHGDoQ1ugH85ppHKwpUHL7j7rN0Ti9NCnGiQbhaZ11FpR+7ao1dNsmduNUg==}
-    engines: {node: '>=12'}
-    dev: false
-
   /eastasianwidth@0.2.0:
     resolution: {integrity: sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==}
 
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index fd6497c..0cba016 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,4 +1,5 @@
 packages:
   - 'holo-key-manager-js-client'
   - 'holo-key-manager-extension'
+  - 'holo-key-manager-extension-scripts'
   - 'shared'
diff --git a/shared/services/storage.ts b/shared/services/storage.ts
index 6d79fa4..9081348 100644
--- a/shared/services/storage.ts
+++ b/shared/services/storage.ts
@@ -1,4 +1,11 @@
-import { APPS_LIST, AUTHENTICATED_APPS_LIST, DEVICE_KEY, LOCAL, SESSION } from '../const';
+import {
+	APPS_LIST,
+	AUTHENTICATED_APPS_LIST,
+	DEVICE_KEY,
+	LOCAL,
+	SESSION,
+	SESSION_STORAGE_KEY
+} from '../const';
 import { isChromeStorageSafe } from '../helpers';
 import {
 	AppsListSchema,
@@ -6,6 +13,7 @@ import {
 	AuthenticatedAppsListSchema,
 	type ChangesType,
 	EncryptedDeviceKeySchema,
+	SessionStateSchema,
 	type StorageService
 } from '../types';
 
@@ -97,3 +105,11 @@ export const signOut = async (happId: string) => {
 		});
 	}
 };
+
+export const getSessionKey = async () => {
+	const data = await storageService.getWithoutCallback({
+		key: SESSION_STORAGE_KEY,
+		area: SESSION
+	});
+	return SessionStateSchema.safeParse(data);
+};
diff --git a/shared/types/message.ts b/shared/types/message.ts
index e8b9556..14b590e 100644
--- a/shared/types/message.ts
+++ b/shared/types/message.ts
@@ -35,6 +35,8 @@ export const MessageToSignSchema = HappIdSchema.extend({
 	message: z.string()
 });
 
+export type MessageToSign = z.infer<typeof MessageToSignSchema>;
+
 export const PubKeySchema = z.object({
 	pubKey: z.string()
 });