diff --git a/jest.config.js b/jest.config.js
index 69cd14f..7cbaf7f 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -20,7 +20,10 @@ module.exports = {
   setupFilesAfterEnv: ['<rootDir>/tests/setup.ts'],
   moduleNameMapper: {
     '^@/(.*)$': '<rootDir>/src/$1',
-    '^pkg/(.*)$': '<rootDir>/pkg/$1'
+    '^~/(.*)$': '<rootDir>/src/$1',
+    '^pkg/(.*)$': '<rootDir>/pkg/$1',
+    '^(.*)\\?raw$': '<rootDir>/tests/rawFileMock.js',
+    '\\.(css|less|sass|scss)$': '<rootDir>/tests/styleMock.js'
   },
   testTimeout: 10000,
   transform: {
diff --git a/tests/rawFileMock.js b/tests/rawFileMock.js
new file mode 100644
index 0000000..9dc5fc1
--- /dev/null
+++ b/tests/rawFileMock.js
@@ -0,0 +1 @@
+module.exports = '';
diff --git a/tests/styleMock.js b/tests/styleMock.js
new file mode 100644
index 0000000..f053ebf
--- /dev/null
+++ b/tests/styleMock.js
@@ -0,0 +1 @@
+module.exports = {};
diff --git a/tests/unit/channel-messages.test.ts b/tests/unit/channel-messages.test.ts
new file mode 100644
index 0000000..503ecf1
--- /dev/null
+++ b/tests/unit/channel-messages.test.ts
@@ -0,0 +1,155 @@
+import { registerAllListeners } from '../../src/router';
+import { MessageType } from '../../src/models/process.model';
+
+// Mocks TokenService
+jest.mock('../../src/services/token', () => {
+  class TokenServiceMock {
+    static async getInstance() { return new TokenServiceMock(); }
+    async generateSessionToken(origin: string) {
+      return { accessToken: `access-${origin}`, refreshToken: `refresh-${origin}` };
+    }
+    async validateToken(token: string, origin: string) { return true; }
+    async refreshAccessToken(refreshToken: string, origin: string) { return `new-access-${origin}`; }
+  }
+  return { __esModule: true, default: TokenServiceMock };
+});
+
+// Mocks Services
+jest.mock('../../src/services/service', () => {
+  class ServicesMock {
+    static instance: any;
+    static async getInstance() {
+      if (!ServicesMock.instance) ServicesMock.instance = new ServicesMock();
+      return ServicesMock.instance;
+    }
+    isPaired() { return true; }
+    async confirmPairing() { /* no-op */ }
+    getPairingProcessId() { return 'pair-123'; }
+    async getProcesses() { return { 'p1': { id: 'p1' } as any }; }
+    async getMyProcesses() { return ['p1', 'p2']; }
+    async getProcess(id: string) { return { states: [{ state_id: 'a'.repeat(64), public_data: {}, pcd_commitment: {}, validation_tokens: [] }] } as any; }
+    async decryptAttribute() { return null; }
+    decodeValue(v: any) { return v; }
+    getHashForFile() { return 'hash-abc'; }
+    getMerkleProofForFile() { return { proof: true } as any; }
+    validateMerkleProof() { return true; }
+    async createPrdUpdate() { return {}; }
+    async approveChange() { return { updated_process: { id: 'p1' } }; }
+    async updateProcess() { return { updated_process: { id: 'p1' } }; }
+    async createProcess() { return { updated_process: { process_id: 'pid', current_process: { states: [{ state_id: 'a'.repeat(64) }] } } } as any; }
+    async handleApiReturn() { /* no-op */ }
+  }
+  return { __esModule: true, default: ServicesMock };
+});
+
+// Mocks ModalService (used by REQUEST_LINK)
+jest.mock('../../src/services/modal.service', () => {
+  class ModalServiceMock {
+    static async getInstance() { return new ModalServiceMock(); }
+    async showConfirmationModal() { return true; }
+  }
+  return { __esModule: true, default: ModalServiceMock };
+});
+
+describe('postMessage interfaces (registerAllListeners)', () => {
+  const ORIGIN = 'https://host.test';
+  let postSpy: jest.SpyInstance;
+
+  beforeAll(async () => {
+    postSpy = jest.spyOn(window.parent, 'postMessage');
+    await registerAllListeners();
+  });
+
+  afterEach(() => {
+    postSpy.mockClear();
+  });
+
+  afterAll(() => {
+    postSpy.mockRestore();
+  });
+
+  function dispatch(data: any) {
+    window.dispatchEvent(new MessageEvent('message', { data, origin: ORIGIN }));
+  }
+
+  async function waitForLastCall(expectedType?: string, prevCount?: number) {
+    const start = Date.now();
+    const timeoutMs = 1000;
+    // eslint-disable-next-line no-constant-condition
+    while (true) {
+      const calls = postSpy.mock.calls;
+      const countOk = prevCount === undefined ? calls.length > 0 : calls.length > (prevCount || 0);
+      if (countOk) {
+        const last = calls[calls.length - 1] as any;
+        const payload = last && last[0];
+        if (!expectedType || (payload && payload.type === expectedType)) {
+          return last;
+        }
+      }
+      if (Date.now() - start > timeoutMs) throw new Error('Timeout waiting for postMessage');
+      await new Promise(r => setTimeout(r, 10));
+    }
+  }
+
+  it('REQUEST_LINK -> LINK_ACCEPTED avec tokens', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.REQUEST_LINK, messageId: 'm1' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.LINK_ACCEPTED, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.LINK_ACCEPTED);
+    expect(payload.accessToken).toContain('access-');
+    expect(payload.refreshToken).toContain('refresh-');
+    expect(payload.messageId).toBe('m1');
+  });
+
+  it('VALIDATE_TOKEN -> VALIDATE_TOKEN avec isValid=true', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.VALIDATE_TOKEN, accessToken: 'a', refreshToken: 'r', messageId: 'm2' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.VALIDATE_TOKEN, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.VALIDATE_TOKEN);
+    expect(payload.isValid).toBe(true);
+    expect(payload.messageId).toBe('m2');
+  });
+
+  it('RENEW_TOKEN -> RENEW_TOKEN avec nouveau accessToken', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.RENEW_TOKEN, refreshToken: 'r', messageId: 'm3' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.RENEW_TOKEN, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.RENEW_TOKEN);
+    expect(typeof payload.accessToken).toBe('string');
+    expect(payload.refreshToken).toBe('r');
+    expect(payload.messageId).toBe('m3');
+  });
+
+  it('GET_PAIRING_ID -> GET_PAIRING_ID avec userPairingId', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.GET_PAIRING_ID, accessToken: 'a', messageId: 'm4' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.GET_PAIRING_ID, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.GET_PAIRING_ID);
+    expect(payload.userPairingId).toBe('pair-123');
+    expect(payload.messageId).toBe('m4');
+  });
+
+  it('GET_MY_PROCESSES -> GET_MY_PROCESSES avec liste', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.GET_MY_PROCESSES, accessToken: 'a', messageId: 'm5' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.GET_MY_PROCESSES, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.GET_MY_PROCESSES);
+    expect(Array.isArray(payload.myProcesses)).toBe(true);
+    expect(payload.messageId).toBe('m5');
+  });
+
+  it('HASH_VALUE -> VALUE_HASHED avec hash', async () => {
+    const prev = postSpy.mock.calls.length;
+    dispatch({ type: MessageType.HASH_VALUE, accessToken: 'a', commitedIn: 'c', label: 'L', fileBlob: { type: 'application/octet-stream', data: new Uint8Array([1]) }, messageId: 'm6' });
+    const [payload, targetOrigin] = (await waitForLastCall(MessageType.VALUE_HASHED, prev)) as any;
+    expect(targetOrigin).toBe(ORIGIN);
+    expect(payload.type).toBe(MessageType.VALUE_HASHED);
+    expect(payload.hash).toBe('hash-abc');
+    expect(payload.messageId).toBe('m6');
+  });
+});