diff --git a/core/identity/application/use-cases/HandleAuthCallbackUseCase.test.ts b/core/identity/application/use-cases/HandleAuthCallbackUseCase.test.ts
index 2353464cc..0184e7e4f 100644
--- a/core/identity/application/use-cases/HandleAuthCallbackUseCase.test.ts
+++ b/core/identity/application/use-cases/HandleAuthCallbackUseCase.test.ts
@@ -1,9 +1,11 @@
 import { describe, it, expect, vi, type Mock } from 'vitest';
 import { HandleAuthCallbackUseCase } from './HandleAuthCallbackUseCase';
-import type { IdentityProviderPort } from '../ports/IdentityProviderPort';
-import type { IdentitySessionPort } from '../ports/IdentitySessionPort';
-import type { AuthCallbackCommand, AuthenticatedUser } from '../ports/IdentityProviderPort';
-import type { AuthSession } from '../ports/IdentitySessionPort';
+import type {
+  AuthCallbackCommand,
+  AuthenticatedUser,
+  IdentityProviderPort,
+} from '../ports/IdentityProviderPort';
+import type { AuthSession, IdentitySessionPort } from '../ports/IdentitySessionPort';
 import type { Logger, UseCaseOutputPort } from '@core/shared/application';
 
 describe('HandleAuthCallbackUseCase', () => {
diff --git a/core/media/application/use-cases/RequestAvatarGenerationUseCase.test.ts b/core/media/application/use-cases/RequestAvatarGenerationUseCase.test.ts
new file mode 100644
index 000000000..e1418140d
--- /dev/null
+++ b/core/media/application/use-cases/RequestAvatarGenerationUseCase.test.ts
@@ -0,0 +1,180 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import {
+  RequestAvatarGenerationUseCase,
+  type RequestAvatarGenerationInput,
+  type RequestAvatarGenerationErrorCode,
+  type RequestAvatarGenerationResult,
+} from './RequestAvatarGenerationUseCase';
+import type { IAvatarGenerationRepository } from '../../domain/repositories/IAvatarGenerationRepository';
+import type { FaceValidationPort } from '../ports/FaceValidationPort';
+import type { AvatarGenerationPort } from '../ports/AvatarGenerationPort';
+
+vi.mock('uuid', () => ({
+  v4: () => 'request-1',
+}));
+
+interface TestOutputPort extends UseCaseOutputPort<RequestAvatarGenerationResult> {
+  present: Mock;
+  result?: RequestAvatarGenerationResult;
+}
+
+describe('RequestAvatarGenerationUseCase', () => {
+  let avatarRepo: { save: Mock };
+  let faceValidation: { validateFacePhoto: Mock };
+  let avatarGeneration: { generateAvatars: Mock };
+  let output: TestOutputPort;
+  let logger: Logger;
+  let useCase: RequestAvatarGenerationUseCase;
+
+  beforeEach(() => {
+    avatarRepo = {
+      save: vi.fn(),
+    };
+
+    faceValidation = {
+      validateFacePhoto: vi.fn(),
+    };
+
+    avatarGeneration = {
+      generateAvatars: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn((result: RequestAvatarGenerationResult) => {
+        output.result = result;
+      }),
+    } as unknown as TestOutputPort;
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger;
+
+    useCase = new RequestAvatarGenerationUseCase(
+      avatarRepo as unknown as IAvatarGenerationRepository,
+      faceValidation as unknown as FaceValidationPort,
+      avatarGeneration as unknown as AvatarGenerationPort,
+      output,
+      logger,
+    );
+  });
+
+  it('completes generation and presents avatar URLs', async () => {
+    faceValidation.validateFacePhoto.mockResolvedValue({
+      isValid: true,
+      hasFace: true,
+      faceCount: 1,
+    });
+
+    avatarGeneration.generateAvatars.mockResolvedValue({
+      success: true,
+      avatars: [{ url: 'https://example.com/a.png' }, { url: 'https://example.com/b.png' }],
+    });
+
+    const input: RequestAvatarGenerationInput = {
+      userId: 'user-1',
+      facePhotoData: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as RequestAvatarGenerationInput['suitColor'],
+      style: 'cartoon',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result).toBeInstanceOf(Result);
+    expect(result.isOk()).toBe(true);
+
+    expect(faceValidation.validateFacePhoto).toHaveBeenCalledWith(input.facePhotoData);
+    expect(avatarGeneration.generateAvatars).toHaveBeenCalled();
+    expect(avatarRepo.save).toHaveBeenCalledTimes(4);
+
+    expect(output.present).toHaveBeenCalledWith({
+      requestId: 'request-1',
+      status: 'completed',
+      avatarUrls: ['https://example.com/a.png', 'https://example.com/b.png'],
+    });
+  });
+
+  it('returns FACE_VALIDATION_FAILED when face validation fails', async () => {
+    faceValidation.validateFacePhoto.mockResolvedValue({
+      isValid: false,
+      hasFace: true,
+      faceCount: 1,
+      errorMessage: 'Bad image',
+    });
+
+    const input: RequestAvatarGenerationInput = {
+      userId: 'user-1',
+      facePhotoData: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as RequestAvatarGenerationInput['suitColor'],
+    };
+
+    const result: Result<void, ApplicationErrorCode<RequestAvatarGenerationErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('FACE_VALIDATION_FAILED');
+    expect(err.details?.message).toBe('Bad image');
+
+    expect(avatarGeneration.generateAvatars).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+    expect(avatarRepo.save).toHaveBeenCalledTimes(3);
+  });
+
+  it('returns GENERATION_FAILED when avatar generation fails', async () => {
+    faceValidation.validateFacePhoto.mockResolvedValue({
+      isValid: true,
+      hasFace: true,
+      faceCount: 1,
+    });
+
+    avatarGeneration.generateAvatars.mockResolvedValue({
+      success: false,
+      errorMessage: 'Generation service down',
+      avatars: [],
+    });
+
+    const input: RequestAvatarGenerationInput = {
+      userId: 'user-1',
+      facePhotoData: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as RequestAvatarGenerationInput['suitColor'],
+    };
+
+    const result: Result<void, ApplicationErrorCode<RequestAvatarGenerationErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('GENERATION_FAILED');
+    expect(err.details?.message).toBe('Generation service down');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect(avatarRepo.save).toHaveBeenCalledTimes(4);
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    avatarRepo.save.mockRejectedValueOnce(new Error('DB error'));
+
+    const input: RequestAvatarGenerationInput = {
+      userId: 'user-1',
+      facePhotoData: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as RequestAvatarGenerationInput['suitColor'],
+    };
+
+    const result: Result<void, ApplicationErrorCode<RequestAvatarGenerationErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details?.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/media/application/use-cases/SelectAvatarUseCase.test.ts b/core/media/application/use-cases/SelectAvatarUseCase.test.ts
new file mode 100644
index 000000000..e2a43de19
--- /dev/null
+++ b/core/media/application/use-cases/SelectAvatarUseCase.test.ts
@@ -0,0 +1,126 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import {
+  SelectAvatarUseCase,
+  type SelectAvatarErrorCode,
+  type SelectAvatarInput,
+  type SelectAvatarResult,
+} from './SelectAvatarUseCase';
+import type { IAvatarGenerationRepository } from '../../domain/repositories/IAvatarGenerationRepository';
+import { AvatarGenerationRequest } from '../../domain/entities/AvatarGenerationRequest';
+
+interface TestOutputPort extends UseCaseOutputPort<SelectAvatarResult> {
+  present: Mock;
+  result?: SelectAvatarResult;
+}
+
+describe('SelectAvatarUseCase', () => {
+  let avatarRepo: { findById: Mock; save: Mock };
+  let logger: Logger;
+  let output: TestOutputPort;
+  let useCase: SelectAvatarUseCase;
+
+  beforeEach(() => {
+    avatarRepo = {
+      findById: vi.fn(),
+      save: vi.fn(),
+    };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger;
+
+    output = {
+      present: vi.fn((result: SelectAvatarResult) => {
+        output.result = result;
+      }),
+    } as unknown as TestOutputPort;
+
+    useCase = new SelectAvatarUseCase(
+      avatarRepo as unknown as IAvatarGenerationRepository,
+      output,
+      logger,
+    );
+  });
+
+  it('returns REQUEST_NOT_FOUND when request does not exist', async () => {
+    avatarRepo.findById.mockResolvedValue(null);
+
+    const input: SelectAvatarInput = { requestId: 'missing', selectedIndex: 0 };
+    const result = await useCase.execute(input);
+
+    expect(avatarRepo.findById).toHaveBeenCalledWith('missing');
+    expect(result).toBeInstanceOf(Result);
+    expect(result.isErr()).toBe(true);
+
+    const err = result.unwrapErr() as ApplicationErrorCode<SelectAvatarErrorCode, { message: string }>;
+    expect(err.code).toBe('REQUEST_NOT_FOUND');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns REQUEST_NOT_COMPLETED when request is not completed', async () => {
+    const request = AvatarGenerationRequest.create({
+      id: 'req-1',
+      userId: 'user-1',
+      facePhotoUrl: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as Parameters<typeof AvatarGenerationRequest.create>[0]['suitColor'],
+    });
+
+    avatarRepo.findById.mockResolvedValue(request);
+
+    const input: SelectAvatarInput = { requestId: 'req-1', selectedIndex: 0 };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<SelectAvatarErrorCode, { message: string }>;
+    expect(err.code).toBe('REQUEST_NOT_COMPLETED');
+
+    expect(avatarRepo.save).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('selects avatar and presents selected URL when request is completed', async () => {
+    const request = AvatarGenerationRequest.create({
+      id: 'req-1',
+      userId: 'user-1',
+      facePhotoUrl: 'data:image/png;base64,abc',
+      suitColor: 'red' as unknown as Parameters<typeof AvatarGenerationRequest.create>[0]['suitColor'],
+    });
+    request.completeWithAvatars(['https://example.com/a.png', 'https://example.com/b.png']);
+
+    avatarRepo.findById.mockResolvedValue(request);
+
+    const input: SelectAvatarInput = { requestId: 'req-1', selectedIndex: 1 };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(request.selectedAvatarIndex).toBe(1);
+    expect(request.selectedAvatarUrl).toBe('https://example.com/b.png');
+
+    expect(avatarRepo.save).toHaveBeenCalledWith(request);
+    expect(output.present).toHaveBeenCalledWith({
+      requestId: 'req-1',
+      selectedAvatarUrl: 'https://example.com/b.png',
+    });
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    avatarRepo.findById.mockRejectedValue(new Error('DB error'));
+
+    const input: SelectAvatarInput = { requestId: 'req-1', selectedIndex: 0 };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<SelectAvatarErrorCode, { message: string }>;
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details?.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/media/application/use-cases/UpdateAvatarUseCase.test.ts b/core/media/application/use-cases/UpdateAvatarUseCase.test.ts
new file mode 100644
index 000000000..57f1e1392
--- /dev/null
+++ b/core/media/application/use-cases/UpdateAvatarUseCase.test.ts
@@ -0,0 +1,130 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import {
+  UpdateAvatarUseCase,
+  type UpdateAvatarErrorCode,
+  type UpdateAvatarInput,
+  type UpdateAvatarResult,
+} from './UpdateAvatarUseCase';
+import type { IAvatarRepository } from '../../domain/repositories/IAvatarRepository';
+import { Avatar } from '../../domain/entities/Avatar';
+
+vi.mock('uuid', () => ({
+  v4: () => 'avatar-1',
+}));
+
+interface TestOutputPort extends UseCaseOutputPort<UpdateAvatarResult> {
+  present: Mock;
+  result?: UpdateAvatarResult;
+}
+
+describe('UpdateAvatarUseCase', () => {
+  let avatarRepo: { findActiveByDriverId: Mock; save: Mock };
+  let logger: Logger;
+  let output: TestOutputPort;
+  let useCase: UpdateAvatarUseCase;
+
+  beforeEach(() => {
+    avatarRepo = {
+      findActiveByDriverId: vi.fn(),
+      save: vi.fn(),
+    };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger;
+
+    output = {
+      present: vi.fn((result: UpdateAvatarResult) => {
+        output.result = result;
+      }),
+    } as unknown as TestOutputPort;
+
+    useCase = new UpdateAvatarUseCase(
+      avatarRepo as unknown as IAvatarRepository,
+      output,
+      logger,
+    );
+  });
+
+  it('creates new avatar when no current active avatar exists', async () => {
+    avatarRepo.findActiveByDriverId.mockResolvedValue(null);
+
+    const input: UpdateAvatarInput = {
+      driverId: 'driver-1',
+      mediaUrl: 'https://example.com/avatar.png',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result).toBeInstanceOf(Result);
+    expect(result.isOk()).toBe(true);
+
+    expect(avatarRepo.findActiveByDriverId).toHaveBeenCalledWith('driver-1');
+    expect(avatarRepo.save).toHaveBeenCalledTimes(1);
+
+    const saved = (avatarRepo.save as unknown as Mock).mock.calls[0]![0] as Avatar;
+    expect(saved.driverId).toBe('driver-1');
+    expect(saved.mediaUrl.value).toBe('https://example.com/avatar.png');
+    expect(saved.isActive).toBe(true);
+
+    expect(output.present).toHaveBeenCalledWith({ avatarId: 'avatar-1', driverId: 'driver-1' });
+  });
+
+  it('deactivates current avatar before saving new avatar', async () => {
+    const currentAvatar = Avatar.reconstitute({
+      id: 'old-avatar',
+      driverId: 'driver-1',
+      mediaUrl: 'https://example.com/old.png',
+      selectedAt: new Date('2020-01-01T00:00:00.000Z'),
+      isActive: true,
+    });
+
+    avatarRepo.findActiveByDriverId.mockResolvedValue(currentAvatar);
+
+    const input: UpdateAvatarInput = {
+      driverId: 'driver-1',
+      mediaUrl: 'https://example.com/new.png',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(avatarRepo.save).toHaveBeenCalledTimes(2);
+
+    const firstSaved = (avatarRepo.save as unknown as Mock).mock.calls[0]![0] as Avatar;
+    expect(firstSaved.id).toBe('old-avatar');
+    expect(firstSaved.isActive).toBe(false);
+
+    const secondSaved = (avatarRepo.save as unknown as Mock).mock.calls[1]![0] as Avatar;
+    expect(secondSaved.id).toBe('avatar-1');
+    expect(secondSaved.isActive).toBe(true);
+
+    expect(output.present).toHaveBeenCalledWith({ avatarId: 'avatar-1', driverId: 'driver-1' });
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    avatarRepo.findActiveByDriverId.mockRejectedValue(new Error('DB error'));
+
+    const input: UpdateAvatarInput = {
+      driverId: 'driver-1',
+      mediaUrl: 'https://example.com/avatar.png',
+    };
+
+    const result: Result<void, ApplicationErrorCode<UpdateAvatarErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details?.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/media/application/use-cases/UploadMediaUseCase.test.ts b/core/media/application/use-cases/UploadMediaUseCase.test.ts
new file mode 100644
index 000000000..66eb39d3b
--- /dev/null
+++ b/core/media/application/use-cases/UploadMediaUseCase.test.ts
@@ -0,0 +1,156 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { Readable } from 'node:stream';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import {
+  UploadMediaUseCase,
+  type MulterFile,
+  type UploadMediaErrorCode,
+  type UploadMediaInput,
+  type UploadMediaResult,
+} from './UploadMediaUseCase';
+import type { IMediaRepository } from '../../domain/repositories/IMediaRepository';
+import type { MediaStoragePort } from '../ports/MediaStoragePort';
+import { Media } from '../../domain/entities/Media';
+
+vi.mock('uuid', () => ({
+  v4: () => 'media-1',
+}));
+
+interface TestOutputPort extends UseCaseOutputPort<UploadMediaResult> {
+  present: Mock;
+  result?: UploadMediaResult;
+}
+
+describe('UploadMediaUseCase', () => {
+  let mediaRepo: { save: Mock };
+  let mediaStorage: { uploadMedia: Mock };
+  let logger: Logger;
+  let output: TestOutputPort;
+  let useCase: UploadMediaUseCase;
+
+  const baseFile: MulterFile = {
+    fieldname: 'file',
+    originalname: 'avatar.png',
+    encoding: '7bit',
+    mimetype: 'image/png',
+    size: 123,
+    buffer: Buffer.from('abc'),
+    stream: Readable.from([]),
+    destination: '/tmp',
+    filename: 'avatar.png',
+    path: '/tmp/avatar.png',
+  };
+
+  beforeEach(() => {
+    mediaRepo = {
+      save: vi.fn(),
+    };
+
+    mediaStorage = {
+      uploadMedia: vi.fn(),
+    };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger;
+
+    output = {
+      present: vi.fn((result: UploadMediaResult) => {
+        output.result = result;
+      }),
+    } as unknown as TestOutputPort;
+
+    useCase = new UploadMediaUseCase(
+      mediaRepo as unknown as IMediaRepository,
+      mediaStorage as unknown as MediaStoragePort,
+      output,
+      logger,
+    );
+  });
+
+  it('returns UPLOAD_FAILED when storage returns unsuccessful result', async () => {
+    mediaStorage.uploadMedia.mockResolvedValue({
+      success: false,
+      errorMessage: 'Upload error',
+    });
+
+    const input: UploadMediaInput = { file: baseFile, uploadedBy: 'user-1' };
+    const result: Result<void, ApplicationErrorCode<UploadMediaErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('UPLOAD_FAILED');
+    expect(err.details?.message).toBe('Upload error');
+
+    expect(mediaRepo.save).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('creates media and presents mediaId/url on success (includes metadata)', async () => {
+    mediaStorage.uploadMedia.mockResolvedValue({
+      success: true,
+      url: 'https://example.com/media.png',
+      filename: 'stored.png',
+    });
+
+    const input: UploadMediaInput = {
+      file: baseFile,
+      uploadedBy: 'user-1',
+      metadata: { foo: 'bar' },
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result).toBeInstanceOf(Result);
+    expect(result.isOk()).toBe(true);
+
+    expect(mediaStorage.uploadMedia).toHaveBeenCalledWith(baseFile.buffer, {
+      filename: baseFile.originalname,
+      mimeType: baseFile.mimetype,
+      metadata: { foo: 'bar' },
+    });
+
+    expect(mediaRepo.save).toHaveBeenCalledTimes(1);
+    const saved = (mediaRepo.save as unknown as Mock).mock.calls[0]![0] as Media;
+    expect(saved.id).toBe('media-1');
+    expect(saved.url.value).toBe('https://example.com/media.png');
+    expect(saved.filename).toBe('stored.png');
+    expect(saved.originalName).toBe('avatar.png');
+    expect(saved.mimeType).toBe('image/png');
+    expect(saved.size).toBe(123);
+    expect(saved.type).toBe('image');
+    expect(saved.uploadedBy).toBe('user-1');
+    expect(saved.metadata).toEqual({ foo: 'bar' });
+
+    expect(output.present).toHaveBeenCalledWith({
+      mediaId: 'media-1',
+      url: 'https://example.com/media.png',
+    });
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    mediaStorage.uploadMedia.mockResolvedValue({
+      success: true,
+      url: 'https://example.com/media.png',
+    });
+    mediaRepo.save.mockRejectedValue(new Error('DB error'));
+
+    const input: UploadMediaInput = { file: baseFile, uploadedBy: 'user-1' };
+    const result: Result<void, ApplicationErrorCode<UploadMediaErrorCode, { message: string }>> =
+      await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details?.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/notifications/application/use-cases/SendNotificationUseCase.test.ts b/core/notifications/application/use-cases/SendNotificationUseCase.test.ts
new file mode 100644
index 000000000..6491be876
--- /dev/null
+++ b/core/notifications/application/use-cases/SendNotificationUseCase.test.ts
@@ -0,0 +1,184 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+
+import {
+  SendNotificationUseCase,
+  type SendNotificationCommand,
+  type SendNotificationErrorCode,
+  type SendNotificationResult,
+} from './SendNotificationUseCase';
+
+import type { INotificationRepository } from '../../domain/repositories/INotificationRepository';
+import type { INotificationPreferenceRepository } from '../../domain/repositories/INotificationPreferenceRepository';
+import type { NotificationGatewayRegistry } from '../ports/NotificationGateway';
+import type { NotificationChannel, NotificationType } from '../../domain/types/NotificationTypes';
+
+vi.mock('uuid', () => ({
+  v4: () => 'notif-1',
+}));
+
+interface TestOutputPort extends UseCaseOutputPort<SendNotificationResult> {
+  present: Mock;
+  result?: SendNotificationResult;
+}
+
+describe('SendNotificationUseCase', () => {
+  let notificationRepository: { create: Mock };
+  let preferenceRepository: { getOrCreateDefault: Mock };
+  let gatewayRegistry: { send: Mock };
+  let logger: Logger;
+  let output: TestOutputPort;
+  let useCase: SendNotificationUseCase;
+
+  beforeEach(() => {
+    notificationRepository = {
+      create: vi.fn(),
+    };
+
+    preferenceRepository = {
+      getOrCreateDefault: vi.fn(),
+    };
+
+    gatewayRegistry = {
+      send: vi.fn(),
+    };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger;
+
+    output = {
+      present: vi.fn((result: SendNotificationResult) => {
+        output.result = result;
+      }),
+    } as unknown as TestOutputPort;
+
+    useCase = new SendNotificationUseCase(
+      notificationRepository as unknown as INotificationRepository,
+      preferenceRepository as unknown as INotificationPreferenceRepository,
+      gatewayRegistry as unknown as NotificationGatewayRegistry,
+      output,
+      logger,
+    );
+  });
+
+  it('creates but does not deliver when type is disabled', async () => {
+    const preferences = {
+      isTypeEnabled: vi.fn().mockReturnValue(false),
+      getEnabledChannelsForType: vi.fn().mockReturnValue(['email'] as NotificationChannel[]),
+      isInQuietHours: vi.fn().mockReturnValue(false),
+    };
+    preferenceRepository.getOrCreateDefault.mockResolvedValue(preferences);
+
+    const command: SendNotificationCommand = {
+      recipientId: 'driver-1',
+      type: 'system_announcement' as NotificationType,
+      title: 'Hello',
+      body: 'World',
+    };
+
+    const result = await useCase.execute(command);
+
+    expect(result).toBeInstanceOf(Result);
+    expect(result.isOk()).toBe(true);
+
+    expect(preferenceRepository.getOrCreateDefault).toHaveBeenCalledWith('driver-1');
+    expect(preferences.isTypeEnabled).toHaveBeenCalledWith('system_announcement');
+    expect(notificationRepository.create).toHaveBeenCalledTimes(1);
+    expect(gatewayRegistry.send).not.toHaveBeenCalled();
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    expect(output.result?.deliveryResults).toEqual([]);
+    expect(output.result?.notification.channel).toBe('in_app');
+    expect(output.result?.notification.status).toBe('dismissed');
+  });
+
+  it('ensures in_app is used and sends external channels when enabled', async () => {
+    const preferences = {
+      isTypeEnabled: vi.fn().mockReturnValue(true),
+      getEnabledChannelsForType: vi.fn().mockReturnValue(['email'] as NotificationChannel[]),
+      isInQuietHours: vi.fn().mockReturnValue(false),
+    };
+    preferenceRepository.getOrCreateDefault.mockResolvedValue(preferences);
+
+    gatewayRegistry.send.mockResolvedValue({
+      success: true,
+      channel: 'email' as NotificationChannel,
+      attemptedAt: new Date(),
+      externalId: 'email-1',
+    });
+
+    const command: SendNotificationCommand = {
+      recipientId: 'driver-1',
+      type: 'system_announcement' as NotificationType,
+      title: 'Hello',
+      body: 'World',
+    };
+
+    const result = await useCase.execute(command);
+
+    expect(result.isOk()).toBe(true);
+
+    // in_app notification must be created, email should be sent via gateway
+    expect(notificationRepository.create).toHaveBeenCalledTimes(1);
+    expect(gatewayRegistry.send).toHaveBeenCalledTimes(1);
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    expect(output.result?.notification.channel).toBe('in_app');
+    expect(output.result?.deliveryResults.length).toBe(2);
+
+    const channels = output.result!.deliveryResults.map(r => r.channel).sort();
+    expect(channels).toEqual(['email', 'in_app']);
+  });
+
+  it('filters external channels during quiet hours', async () => {
+    const preferences = {
+      isTypeEnabled: vi.fn().mockReturnValue(true),
+      getEnabledChannelsForType: vi.fn().mockReturnValue(['email', 'discord'] as NotificationChannel[]),
+      isInQuietHours: vi.fn().mockReturnValue(true),
+    };
+    preferenceRepository.getOrCreateDefault.mockResolvedValue(preferences);
+
+    const command: SendNotificationCommand = {
+      recipientId: 'driver-1',
+      type: 'system_announcement' as NotificationType,
+      title: 'Hello',
+      body: 'World',
+    };
+
+    const result = await useCase.execute(command);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(notificationRepository.create).toHaveBeenCalledTimes(1);
+    expect(gatewayRegistry.send).not.toHaveBeenCalled();
+
+    expect(output.result?.deliveryResults.length).toBe(1);
+    expect(output.result?.deliveryResults[0]?.channel).toBe('in_app');
+  });
+
+  it('returns REPOSITORY_ERROR when preference repository throws', async () => {
+    preferenceRepository.getOrCreateDefault.mockRejectedValue(new Error('DB error'));
+
+    const command: SendNotificationCommand = {
+      recipientId: 'driver-1',
+      type: 'system_announcement' as NotificationType,
+      title: 'Hello',
+      body: 'World',
+    };
+
+    const result: Result<void, ApplicationErrorCode<SendNotificationErrorCode, { message: string }>> =
+      await useCase.execute(command);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr();
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details?.message).toBe('DB error');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/AwardPrizeUseCase.test.ts b/core/payments/application/use-cases/AwardPrizeUseCase.test.ts
new file mode 100644
index 000000000..221bfc0e3
--- /dev/null
+++ b/core/payments/application/use-cases/AwardPrizeUseCase.test.ts
@@ -0,0 +1,104 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { AwardPrizeUseCase, type AwardPrizeInput } from './AwardPrizeUseCase';
+import type { IPrizeRepository } from '../../domain/repositories/IPrizeRepository';
+import { PrizeType, type Prize } from '../../domain/entities/Prize';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('AwardPrizeUseCase', () => {
+  let prizeRepository: { findById: Mock; update: Mock };
+  let output: { present: Mock };
+  let useCase: AwardPrizeUseCase;
+
+  beforeEach(() => {
+    prizeRepository = {
+      findById: vi.fn(),
+      update: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new AwardPrizeUseCase(
+      prizeRepository as unknown as IPrizeRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns PRIZE_NOT_FOUND when prize does not exist', async () => {
+    prizeRepository.findById.mockResolvedValue(null);
+
+    const input: AwardPrizeInput = { prizeId: 'prize-1', driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('PRIZE_NOT_FOUND');
+    expect(prizeRepository.update).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns PRIZE_ALREADY_AWARDED when prize is already awarded', async () => {
+    const prize: Prize = {
+      id: 'prize-1',
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: true,
+      awardedTo: 'driver-x',
+      awardedAt: new Date(),
+      createdAt: new Date(),
+    };
+    prizeRepository.findById.mockResolvedValue(prize);
+
+    const input: AwardPrizeInput = { prizeId: 'prize-1', driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('PRIZE_ALREADY_AWARDED');
+    expect(prizeRepository.update).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('awards prize and presents updated prize', async () => {
+    const prize: Prize = {
+      id: 'prize-1',
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: false,
+      createdAt: new Date('2024-01-01T00:00:00.000Z'),
+    };
+
+    prizeRepository.findById.mockResolvedValue(prize);
+    prizeRepository.update.mockImplementation(async (p: Prize) => p);
+
+    const input: AwardPrizeInput = { prizeId: 'prize-1', driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(prizeRepository.update).toHaveBeenCalledWith(
+      expect.objectContaining({
+        id: 'prize-1',
+        awarded: true,
+        awardedTo: 'driver-1',
+        awardedAt: expect.any(Date),
+      }),
+    );
+
+    expect(output.present).toHaveBeenCalledWith({
+      prize: expect.objectContaining({
+        id: 'prize-1',
+        awarded: true,
+        awardedTo: 'driver-1',
+        awardedAt: expect.any(Date),
+      }),
+    });
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/CreatePrizeUseCase.test.ts b/core/payments/application/use-cases/CreatePrizeUseCase.test.ts
new file mode 100644
index 000000000..9b7e54b0d
--- /dev/null
+++ b/core/payments/application/use-cases/CreatePrizeUseCase.test.ts
@@ -0,0 +1,102 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { CreatePrizeUseCase, type CreatePrizeInput } from './CreatePrizeUseCase';
+import type { IPrizeRepository } from '../../domain/repositories/IPrizeRepository';
+import { PrizeType, type Prize } from '../../domain/entities/Prize';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('CreatePrizeUseCase', () => {
+  let prizeRepository: { findByPosition: Mock; create: Mock };
+  let output: { present: Mock };
+  let useCase: CreatePrizeUseCase;
+
+  beforeEach(() => {
+    prizeRepository = {
+      findByPosition: vi.fn(),
+      create: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new CreatePrizeUseCase(
+      prizeRepository as unknown as IPrizeRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns PRIZE_ALREADY_EXISTS when prize already exists for position', async () => {
+    const existingPrize: Prize = {
+      id: 'prize-existing',
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: false,
+      createdAt: new Date(),
+    };
+
+    prizeRepository.findByPosition.mockResolvedValue(existingPrize);
+
+    const input: CreatePrizeInput = {
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('PRIZE_ALREADY_EXISTS');
+    expect(prizeRepository.create).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('creates prize and presents created prize', async () => {
+    prizeRepository.findByPosition.mockResolvedValue(null);
+    prizeRepository.create.mockImplementation(async (p: Prize) => p);
+
+    const input: CreatePrizeInput = {
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      description: 'Top prize',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(prizeRepository.findByPosition).toHaveBeenCalledWith('league-1', 'season-1', 1);
+
+    expect(prizeRepository.create).toHaveBeenCalledWith({
+      id: expect.stringContaining('prize-'),
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: false,
+      createdAt: expect.any(Date),
+      description: 'Top prize',
+    });
+
+    expect(output.present).toHaveBeenCalledWith({
+      prize: expect.objectContaining({
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        position: 1,
+        awarded: false,
+      }),
+    });
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/DeletePrizeUseCase.test.ts b/core/payments/application/use-cases/DeletePrizeUseCase.test.ts
new file mode 100644
index 000000000..94b579e12
--- /dev/null
+++ b/core/payments/application/use-cases/DeletePrizeUseCase.test.ts
@@ -0,0 +1,87 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { DeletePrizeUseCase, type DeletePrizeInput } from './DeletePrizeUseCase';
+import type { IPrizeRepository } from '../../domain/repositories/IPrizeRepository';
+import { PrizeType, type Prize } from '../../domain/entities/Prize';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('DeletePrizeUseCase', () => {
+  let prizeRepository: { findById: Mock; delete: Mock };
+  let output: { present: Mock };
+  let useCase: DeletePrizeUseCase;
+
+  beforeEach(() => {
+    prizeRepository = {
+      findById: vi.fn(),
+      delete: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new DeletePrizeUseCase(
+      prizeRepository as unknown as IPrizeRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns PRIZE_NOT_FOUND when prize does not exist', async () => {
+    prizeRepository.findById.mockResolvedValue(null);
+
+    const input: DeletePrizeInput = { prizeId: 'prize-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('PRIZE_NOT_FOUND');
+    expect(prizeRepository.delete).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns CANNOT_DELETE_AWARDED_PRIZE when prize is awarded', async () => {
+    const prize: Prize = {
+      id: 'prize-1',
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: true,
+      awardedTo: 'driver-1',
+      awardedAt: new Date(),
+      createdAt: new Date(),
+    };
+    prizeRepository.findById.mockResolvedValue(prize);
+
+    const input: DeletePrizeInput = { prizeId: 'prize-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('CANNOT_DELETE_AWARDED_PRIZE');
+    expect(prizeRepository.delete).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('deletes prize and presents success', async () => {
+    const prize: Prize = {
+      id: 'prize-1',
+      leagueId: 'league-1',
+      seasonId: 'season-1',
+      position: 1,
+      name: 'Winner',
+      amount: 100,
+      type: PrizeType.CASH,
+      awarded: false,
+      createdAt: new Date(),
+    };
+    prizeRepository.findById.mockResolvedValue(prize);
+    prizeRepository.delete.mockResolvedValue(undefined);
+
+    const input: DeletePrizeInput = { prizeId: 'prize-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(prizeRepository.delete).toHaveBeenCalledWith('prize-1');
+    expect(output.present).toHaveBeenCalledWith({ success: true });
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/GetPrizesUseCase.test.ts b/core/payments/application/use-cases/GetPrizesUseCase.test.ts
new file mode 100644
index 000000000..9db4224ec
--- /dev/null
+++ b/core/payments/application/use-cases/GetPrizesUseCase.test.ts
@@ -0,0 +1,110 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { GetPrizesUseCase, type GetPrizesInput } from './GetPrizesUseCase';
+import type { IPrizeRepository } from '../../domain/repositories/IPrizeRepository';
+import { PrizeType, type Prize } from '../../domain/entities/Prize';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('GetPrizesUseCase', () => {
+  let prizeRepository: {
+    findByLeagueId: Mock;
+    findByLeagueIdAndSeasonId: Mock;
+  };
+  let output: { present: Mock };
+  let useCase: GetPrizesUseCase;
+
+  beforeEach(() => {
+    prizeRepository = {
+      findByLeagueId: vi.fn(),
+      findByLeagueIdAndSeasonId: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new GetPrizesUseCase(
+      prizeRepository as unknown as IPrizeRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('retrieves and sorts prizes by leagueId when seasonId is not provided', async () => {
+    const prizes: Prize[] = [
+      {
+        id: 'p2',
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        position: 2,
+        name: 'Second',
+        amount: 50,
+        type: PrizeType.CASH,
+        awarded: false,
+        createdAt: new Date(),
+      },
+      {
+        id: 'p1',
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        position: 1,
+        name: 'First',
+        amount: 100,
+        type: PrizeType.CASH,
+        awarded: false,
+        createdAt: new Date(),
+      },
+    ];
+    prizeRepository.findByLeagueId.mockResolvedValue(prizes);
+
+    const input: GetPrizesInput = { leagueId: 'league-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(prizeRepository.findByLeagueId).toHaveBeenCalledWith('league-1');
+    expect(prizeRepository.findByLeagueIdAndSeasonId).not.toHaveBeenCalled();
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as unknown as Mock).mock.calls[0]![0]!.prizes as Prize[];
+    expect(presented.map(p => p.position)).toEqual([1, 2]);
+    expect(presented.map(p => p.id)).toEqual(['p1', 'p2']);
+  });
+
+  it('retrieves and sorts prizes by leagueId and seasonId when provided', async () => {
+    const prizes: Prize[] = [
+      {
+        id: 'p3',
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        position: 3,
+        name: 'Third',
+        amount: 25,
+        type: PrizeType.CASH,
+        awarded: false,
+        createdAt: new Date(),
+      },
+      {
+        id: 'p1',
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        position: 1,
+        name: 'First',
+        amount: 100,
+        type: PrizeType.CASH,
+        awarded: false,
+        createdAt: new Date(),
+      },
+    ];
+    prizeRepository.findByLeagueIdAndSeasonId.mockResolvedValue(prizes);
+
+    const input: GetPrizesInput = { leagueId: 'league-1', seasonId: 'season-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(prizeRepository.findByLeagueIdAndSeasonId).toHaveBeenCalledWith('league-1', 'season-1');
+    expect(prizeRepository.findByLeagueId).not.toHaveBeenCalled();
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as unknown as Mock).mock.calls[0]![0]!.prizes as Prize[];
+    expect(presented.map(p => p.position)).toEqual([1, 3]);
+    expect(presented.map(p => p.id)).toEqual(['p1', 'p3']);
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/GetSponsorBillingUseCase.test.ts b/core/payments/application/use-cases/GetSponsorBillingUseCase.test.ts
new file mode 100644
index 000000000..5c2fc4d50
--- /dev/null
+++ b/core/payments/application/use-cases/GetSponsorBillingUseCase.test.ts
@@ -0,0 +1,114 @@
+import { describe, it, expect, vi, type Mock } from 'vitest';
+import { GetSponsorBillingUseCase, type GetSponsorBillingInput } from './GetSponsorBillingUseCase';
+import type { IPaymentRepository } from '../../domain/repositories/IPaymentRepository';
+import type { Payment } from '../../domain/entities/Payment';
+import { PaymentStatus, PaymentType, PayerType } from '../../domain/entities/Payment';
+import type { ISeasonSponsorshipRepository } from '@core/racing/domain/repositories/ISeasonSponsorshipRepository';
+import { SeasonSponsorship } from '@core/racing/domain/entities/season/SeasonSponsorship';
+import { Money } from '@core/racing/domain/value-objects/Money';
+
+describe('GetSponsorBillingUseCase', () => {
+  let paymentRepository: { findByFilters: Mock };
+  let seasonSponsorshipRepository: { findBySponsorId: Mock };
+  let useCase: GetSponsorBillingUseCase;
+
+  beforeEach(() => {
+    paymentRepository = {
+      findByFilters: vi.fn(),
+    };
+
+    seasonSponsorshipRepository = {
+      findBySponsorId: vi.fn(),
+    };
+
+    useCase = new GetSponsorBillingUseCase(
+      paymentRepository as unknown as IPaymentRepository,
+      seasonSponsorshipRepository as unknown as ISeasonSponsorshipRepository,
+    );
+  });
+
+  it('derives invoices and stats from payments and sponsorships', async () => {
+    const sponsorId = 'sponsor-1';
+
+    const payments: Payment[] = [
+      {
+        id: 'pay-1',
+        type: PaymentType.SPONSORSHIP,
+        amount: 100,
+        platformFee: 10,
+        netAmount: 90,
+        payerId: sponsorId,
+        payerType: PayerType.SPONSOR,
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        status: PaymentStatus.COMPLETED,
+        createdAt: new Date('2024-01-01T00:00:00.000Z'),
+        completedAt: new Date('2024-01-01T00:00:00.000Z'),
+      },
+      {
+        id: 'pay-2',
+        type: PaymentType.SPONSORSHIP,
+        amount: 50,
+        platformFee: 5,
+        netAmount: 45,
+        payerId: sponsorId,
+        payerType: PayerType.SPONSOR,
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        status: PaymentStatus.PENDING,
+        createdAt: new Date('2024-02-01T00:00:00.000Z'),
+      },
+    ];
+
+    paymentRepository.findByFilters.mockResolvedValue(payments);
+
+    const sponsorships = [
+      SeasonSponsorship.create({
+        id: 'ss-1',
+        seasonId: 'season-1',
+        leagueId: 'league-1',
+        sponsorId,
+        tier: 'main',
+        pricing: Money.create(100, 'USD'),
+        status: 'active',
+      }),
+      SeasonSponsorship.create({
+        id: 'ss-2',
+        seasonId: 'season-2',
+        leagueId: 'league-1',
+        sponsorId,
+        tier: 'secondary',
+        pricing: Money.create(50, 'USD'),
+        status: 'pending',
+      }),
+    ];
+
+    seasonSponsorshipRepository.findBySponsorId.mockResolvedValue(sponsorships);
+
+    const input: GetSponsorBillingInput = { sponsorId };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    const value = result.unwrap();
+
+    expect(paymentRepository.findByFilters).toHaveBeenCalledWith({
+      payerId: sponsorId,
+      type: PaymentType.SPONSORSHIP,
+    });
+
+    expect(seasonSponsorshipRepository.findBySponsorId).toHaveBeenCalledWith(sponsorId);
+
+    expect(value.paymentMethods).toEqual([]);
+    expect(value.invoices).toHaveLength(2);
+
+    // totals: each invoice adds 19% VAT
+    // pay-1 total: 100 + 19 = 119 (paid)
+    // pay-2 total: 50 + 9.5 = 59.5 (pending)
+    expect(value.stats.totalSpent).toBeCloseTo(119, 5);
+    expect(value.stats.pendingAmount).toBeCloseTo(59.5, 5);
+
+    expect(value.stats.activeSponsorships).toBe(1);
+    expect(value.stats.nextPaymentDate).not.toBeNull();
+    expect(value.stats.nextPaymentAmount).not.toBeNull();
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/GetWalletUseCase.test.ts b/core/payments/application/use-cases/GetWalletUseCase.test.ts
new file mode 100644
index 000000000..3ad6589e9
--- /dev/null
+++ b/core/payments/application/use-cases/GetWalletUseCase.test.ts
@@ -0,0 +1,142 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import { GetWalletUseCase, type GetWalletInput } from './GetWalletUseCase';
+import type { ITransactionRepository, IWalletRepository } from '../../domain/repositories/IWalletRepository';
+import type { Transaction, Wallet } from '../../domain/entities/Wallet';
+import { TransactionType } from '../../domain/entities/Wallet';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('GetWalletUseCase', () => {
+  let walletRepository: {
+    findByLeagueId: Mock;
+    create: Mock;
+  };
+
+  let transactionRepository: {
+    findByWalletId: Mock;
+  };
+
+  let output: {
+    present: Mock;
+  };
+
+  let useCase: GetWalletUseCase;
+
+  beforeEach(() => {
+    walletRepository = {
+      findByLeagueId: vi.fn(),
+      create: vi.fn(),
+    };
+
+    transactionRepository = {
+      findByWalletId: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new GetWalletUseCase(
+      walletRepository as unknown as IWalletRepository,
+      transactionRepository as unknown as ITransactionRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns INVALID_INPUT when leagueId is missing', async () => {
+    const input = { leagueId: '' } as unknown as GetWalletInput;
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('INVALID_INPUT');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('presents existing wallet and transactions sorted desc by createdAt', async () => {
+    const input: GetWalletInput = { leagueId: 'league-1' };
+
+    const wallet: Wallet = {
+      id: 'wallet-1',
+      leagueId: 'league-1',
+      balance: 50,
+      totalRevenue: 100,
+      totalPlatformFees: 5,
+      totalWithdrawn: 10,
+      currency: 'USD',
+      createdAt: new Date('2025-01-01T00:00:00.000Z'),
+    };
+
+    const older: Transaction = {
+      id: 'txn-older',
+      walletId: 'wallet-1',
+      type: TransactionType.DEPOSIT,
+      amount: 25,
+      description: 'Older',
+      createdAt: new Date('2025-01-01T00:00:00.000Z'),
+    };
+
+    const newer: Transaction = {
+      id: 'txn-newer',
+      walletId: 'wallet-1',
+      type: TransactionType.WITHDRAWAL,
+      amount: 10,
+      description: 'Newer',
+      createdAt: new Date('2025-01-02T00:00:00.000Z'),
+    };
+
+    walletRepository.findByLeagueId.mockResolvedValue(wallet);
+    transactionRepository.findByWalletId.mockResolvedValue([older, newer]);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(transactionRepository.findByWalletId).toHaveBeenCalledWith('wallet-1');
+    expect(output.present).toHaveBeenCalledWith({
+      wallet,
+      transactions: [newer, older],
+    });
+  });
+
+  it('creates wallet when missing, then presents wallet and transactions', async () => {
+    const input: GetWalletInput = { leagueId: 'league-1' };
+
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+    vi.spyOn(Math, 'random').mockReturnValue(0.123456789);
+
+    try {
+      walletRepository.findByLeagueId.mockResolvedValue(null);
+
+      walletRepository.create.mockImplementation(async (w: Wallet) => w);
+
+      transactionRepository.findByWalletId.mockResolvedValue([]);
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(walletRepository.create).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: expect.stringMatching(/^wallet-1735689600000-[a-z0-9]{9}$/),
+          leagueId: 'league-1',
+          balance: 0,
+          totalRevenue: 0,
+          totalPlatformFees: 0,
+          totalWithdrawn: 0,
+          currency: 'USD',
+          createdAt: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      const createdWalletArg = walletRepository.create.mock.calls[0]?.[0] as Wallet;
+      expect(transactionRepository.findByWalletId).toHaveBeenCalledWith(createdWalletArg.id);
+
+      expect(output.present).toHaveBeenCalledWith({
+        wallet: createdWalletArg,
+        transactions: [],
+      });
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/UpdateMemberPaymentUseCase.test.ts b/core/payments/application/use-cases/UpdateMemberPaymentUseCase.test.ts
new file mode 100644
index 000000000..c9c7977bc
--- /dev/null
+++ b/core/payments/application/use-cases/UpdateMemberPaymentUseCase.test.ts
@@ -0,0 +1,170 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import { UpdateMemberPaymentUseCase, type UpdateMemberPaymentInput } from './UpdateMemberPaymentUseCase';
+import type { IMembershipFeeRepository, IMemberPaymentRepository } from '../../domain/repositories/IMembershipFeeRepository';
+import { MemberPaymentStatus, type MemberPayment } from '../../domain/entities/MemberPayment';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('UpdateMemberPaymentUseCase', () => {
+  let membershipFeeRepository: {
+    findById: Mock;
+  };
+
+  let memberPaymentRepository: {
+    findByFeeIdAndDriverId: Mock;
+    create: Mock;
+    update: Mock;
+  };
+
+  let output: {
+    present: Mock;
+  };
+
+  let useCase: UpdateMemberPaymentUseCase;
+
+  beforeEach(() => {
+    membershipFeeRepository = {
+      findById: vi.fn(),
+    };
+
+    memberPaymentRepository = {
+      findByFeeIdAndDriverId: vi.fn(),
+      create: vi.fn(),
+      update: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new UpdateMemberPaymentUseCase(
+      membershipFeeRepository as unknown as IMembershipFeeRepository,
+      memberPaymentRepository as unknown as IMemberPaymentRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns MEMBERSHIP_FEE_NOT_FOUND when fee does not exist', async () => {
+    const input: UpdateMemberPaymentInput = {
+      feeId: 'fee-1',
+      driverId: 'driver-1',
+    };
+
+    membershipFeeRepository.findById.mockResolvedValue(null);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('MEMBERSHIP_FEE_NOT_FOUND');
+    expect(memberPaymentRepository.findByFeeIdAndDriverId).not.toHaveBeenCalled();
+    expect(memberPaymentRepository.create).not.toHaveBeenCalled();
+    expect(memberPaymentRepository.update).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('creates a new payment when missing, applies status and paidAt when PAID', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+    vi.spyOn(Math, 'random').mockReturnValue(0.123456789);
+
+    try {
+      const input: UpdateMemberPaymentInput = {
+        feeId: 'fee-1',
+        driverId: 'driver-1',
+        status: MemberPaymentStatus.PAID,
+      };
+
+      const fee = {
+        id: 'fee-1',
+        leagueId: 'league-1',
+        type: 'season',
+        amount: 100,
+        enabled: true,
+        createdAt: new Date('2024-01-01T00:00:00.000Z'),
+        updatedAt: new Date('2024-01-02T00:00:00.000Z'),
+      };
+
+      membershipFeeRepository.findById.mockResolvedValue(fee);
+      memberPaymentRepository.findByFeeIdAndDriverId.mockResolvedValue(null);
+      memberPaymentRepository.create.mockImplementation(async (p: MemberPayment) => ({ ...p }));
+      memberPaymentRepository.update.mockImplementation(async (p: MemberPayment) => p);
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(memberPaymentRepository.create).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: expect.stringMatching(/^mp-1735689600000-[a-z0-9]{9}$/),
+          feeId: 'fee-1',
+          driverId: 'driver-1',
+          amount: 100,
+          platformFee: 10,
+          netAmount: 90,
+          status: MemberPaymentStatus.PENDING,
+          dueDate: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      expect(memberPaymentRepository.update).toHaveBeenCalledWith(
+        expect.objectContaining({
+          status: MemberPaymentStatus.PAID,
+          paidAt: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      const updated = memberPaymentRepository.update.mock.calls[0]?.[0] as MemberPayment;
+      expect(output.present).toHaveBeenCalledWith({ payment: updated });
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
+  it('updates existing payment status and parses paidAt string', async () => {
+    const input: UpdateMemberPaymentInput = {
+      feeId: 'fee-1',
+      driverId: 'driver-1',
+      status: MemberPaymentStatus.PAID,
+      paidAt: '2025-02-01T00:00:00.000Z',
+    };
+
+    const fee = {
+      id: 'fee-1',
+      leagueId: 'league-1',
+      type: 'season',
+      amount: 100,
+      enabled: true,
+      createdAt: new Date('2024-01-01T00:00:00.000Z'),
+      updatedAt: new Date('2024-01-02T00:00:00.000Z'),
+    };
+
+    const existingPayment: MemberPayment = {
+      id: 'mp-1',
+      feeId: 'fee-1',
+      driverId: 'driver-1',
+      amount: 100,
+      platformFee: 10,
+      netAmount: 90,
+      status: MemberPaymentStatus.PENDING,
+      dueDate: new Date('2025-01-01T00:00:00.000Z'),
+    };
+
+    membershipFeeRepository.findById.mockResolvedValue(fee);
+    memberPaymentRepository.findByFeeIdAndDriverId.mockResolvedValue(existingPayment);
+    memberPaymentRepository.update.mockImplementation(async (p: MemberPayment) => p);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(memberPaymentRepository.update).toHaveBeenCalledWith(
+      expect.objectContaining({
+        id: 'mp-1',
+        status: MemberPaymentStatus.PAID,
+        paidAt: new Date('2025-02-01T00:00:00.000Z'),
+      }),
+    );
+
+    const updated = memberPaymentRepository.update.mock.calls[0]?.[0] as MemberPayment;
+    expect(output.present).toHaveBeenCalledWith({ payment: updated });
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/UpdatePaymentStatusUseCase.test.ts b/core/payments/application/use-cases/UpdatePaymentStatusUseCase.test.ts
new file mode 100644
index 000000000..ec4a7fb25
--- /dev/null
+++ b/core/payments/application/use-cases/UpdatePaymentStatusUseCase.test.ts
@@ -0,0 +1,154 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import { UpdatePaymentStatusUseCase, type UpdatePaymentStatusInput } from './UpdatePaymentStatusUseCase';
+import type { IPaymentRepository } from '../../domain/repositories/IPaymentRepository';
+import { PaymentStatus, PaymentType, PayerType, type Payment } from '../../domain/entities/Payment';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('UpdatePaymentStatusUseCase', () => {
+  let paymentRepository: {
+    findById: Mock;
+    update: Mock;
+  };
+
+  let output: {
+    present: Mock;
+  };
+
+  let useCase: UpdatePaymentStatusUseCase;
+
+  beforeEach(() => {
+    paymentRepository = {
+      findById: vi.fn(),
+      update: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new UpdatePaymentStatusUseCase(
+      paymentRepository as unknown as IPaymentRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('returns PAYMENT_NOT_FOUND when payment does not exist', async () => {
+    const input: UpdatePaymentStatusInput = {
+      paymentId: 'payment-1',
+      status: PaymentStatus.COMPLETED,
+    };
+
+    paymentRepository.findById.mockResolvedValue(null);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    expect(result.unwrapErr().code).toBe('PAYMENT_NOT_FOUND');
+    expect(paymentRepository.update).not.toHaveBeenCalled();
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('sets completedAt when status becomes COMPLETED', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+
+    try {
+      const input: UpdatePaymentStatusInput = {
+        paymentId: 'payment-1',
+        status: PaymentStatus.COMPLETED,
+      };
+
+      const existingPayment: Payment = {
+        id: 'payment-1',
+        type: PaymentType.SPONSORSHIP,
+        amount: 100,
+        platformFee: 5,
+        netAmount: 95,
+        payerId: 'payer-1',
+        payerType: PayerType.SPONSOR,
+        leagueId: 'league-1',
+        status: PaymentStatus.PENDING,
+        createdAt: new Date('2024-12-31T00:00:00.000Z'),
+      };
+
+      paymentRepository.findById.mockResolvedValue(existingPayment);
+      paymentRepository.update.mockImplementation(async (p: Payment) => ({ ...p }));
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(paymentRepository.update).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: 'payment-1',
+          status: PaymentStatus.COMPLETED,
+          completedAt: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      const savedPayment = paymentRepository.update.mock.results[0]?.value;
+      await expect(savedPayment).resolves.toEqual(
+        expect.objectContaining({
+          id: 'payment-1',
+          status: PaymentStatus.COMPLETED,
+          completedAt: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      const presentedPayment = (output.present.mock.calls[0]?.[0] as { payment: Payment }).payment;
+      expect(presentedPayment.status).toBe(PaymentStatus.COMPLETED);
+      expect(presentedPayment.completedAt).toEqual(new Date('2025-01-01T00:00:00.000Z'));
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
+  it('preserves completedAt when status is not COMPLETED', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2026-01-01T00:00:00.000Z'));
+
+    try {
+      const input: UpdatePaymentStatusInput = {
+        paymentId: 'payment-1',
+        status: PaymentStatus.FAILED,
+      };
+
+      const existingCompletedAt = new Date('2025-01-01T00:00:00.000Z');
+
+      const existingPayment: Payment = {
+        id: 'payment-1',
+        type: PaymentType.SPONSORSHIP,
+        amount: 100,
+        platformFee: 5,
+        netAmount: 95,
+        payerId: 'payer-1',
+        payerType: PayerType.SPONSOR,
+        leagueId: 'league-1',
+        status: PaymentStatus.COMPLETED,
+        createdAt: new Date('2024-12-31T00:00:00.000Z'),
+        completedAt: existingCompletedAt,
+      };
+
+      paymentRepository.findById.mockResolvedValue(existingPayment);
+      paymentRepository.update.mockImplementation(async (p: Payment) => ({ ...p }));
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(paymentRepository.update).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: 'payment-1',
+          status: PaymentStatus.FAILED,
+          completedAt: existingCompletedAt,
+        }),
+      );
+
+      const presentedPayment = (output.present.mock.calls[0]?.[0] as { payment: Payment }).payment;
+      expect(presentedPayment.status).toBe(PaymentStatus.FAILED);
+      expect(presentedPayment.completedAt).toEqual(existingCompletedAt);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/UpsertMembershipFeeUseCase.test.ts b/core/payments/application/use-cases/UpsertMembershipFeeUseCase.test.ts
new file mode 100644
index 000000000..f5e1a90f4
--- /dev/null
+++ b/core/payments/application/use-cases/UpsertMembershipFeeUseCase.test.ts
@@ -0,0 +1,127 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import { UpsertMembershipFeeUseCase, type UpsertMembershipFeeInput } from './UpsertMembershipFeeUseCase';
+import type { IMembershipFeeRepository } from '../../domain/repositories/IMembershipFeeRepository';
+import { MembershipFeeType, type MembershipFee } from '../../domain/entities/MembershipFee';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+
+describe('UpsertMembershipFeeUseCase', () => {
+  let membershipFeeRepository: {
+    findByLeagueId: Mock;
+    create: Mock;
+    update: Mock;
+  };
+
+  let output: {
+    present: Mock;
+  };
+
+  let useCase: UpsertMembershipFeeUseCase;
+
+  beforeEach(() => {
+    membershipFeeRepository = {
+      findByLeagueId: vi.fn(),
+      create: vi.fn(),
+      update: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    };
+
+    useCase = new UpsertMembershipFeeUseCase(
+      membershipFeeRepository as unknown as IMembershipFeeRepository,
+      output as unknown as UseCaseOutputPort<unknown>,
+    );
+  });
+
+  it('creates a fee when none exists and presents it', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+    vi.spyOn(Math, 'random').mockReturnValue(0.123456789);
+
+    try {
+      const input: UpsertMembershipFeeInput = {
+        leagueId: 'league-1',
+        type: MembershipFeeType.SEASON,
+        amount: 100,
+      };
+
+      membershipFeeRepository.findByLeagueId.mockResolvedValue(null);
+      membershipFeeRepository.create.mockImplementation(async (fee: MembershipFee) => ({ ...fee }));
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(membershipFeeRepository.create).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: expect.stringMatching(/^fee-1735689600000-[a-z0-9]{9}$/),
+          leagueId: 'league-1',
+          type: MembershipFeeType.SEASON,
+          amount: 100,
+          enabled: true,
+          createdAt: new Date('2025-01-01T00:00:00.000Z'),
+          updatedAt: new Date('2025-01-01T00:00:00.000Z'),
+        }),
+      );
+
+      const createdFee = (output.present.mock.calls[0]?.[0] as { fee: MembershipFee }).fee;
+      expect(createdFee.enabled).toBe(true);
+      expect(createdFee.amount).toBe(100);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
+  it('updates an existing fee and sets enabled=false when amount is 0', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-02T00:00:00.000Z'));
+
+    try {
+      const input: UpsertMembershipFeeInput = {
+        leagueId: 'league-1',
+        seasonId: 'season-2',
+        type: MembershipFeeType.MONTHLY,
+        amount: 0,
+      };
+
+      const existingFee: MembershipFee = {
+        id: 'fee-1',
+        leagueId: 'league-1',
+        seasonId: 'season-1',
+        type: MembershipFeeType.SEASON,
+        amount: 100,
+        enabled: true,
+        createdAt: new Date('2024-01-01T00:00:00.000Z'),
+        updatedAt: new Date('2024-01-01T00:00:00.000Z'),
+      };
+
+      membershipFeeRepository.findByLeagueId.mockResolvedValue(existingFee);
+      membershipFeeRepository.update.mockImplementation(async (fee: MembershipFee) => ({ ...fee }));
+
+      const result = await useCase.execute(input);
+
+      expect(result.isOk()).toBe(true);
+
+      expect(membershipFeeRepository.update).toHaveBeenCalledWith(
+        expect.objectContaining({
+          id: 'fee-1',
+          leagueId: 'league-1',
+          seasonId: 'season-2',
+          type: MembershipFeeType.MONTHLY,
+          amount: 0,
+          enabled: false,
+          updatedAt: new Date('2025-01-02T00:00:00.000Z'),
+        }),
+      );
+
+      const updatedFee = (output.present.mock.calls[0]?.[0] as { fee: MembershipFee }).fee;
+      expect(updatedFee.enabled).toBe(false);
+      expect(updatedFee.amount).toBe(0);
+      expect(updatedFee.seasonId).toBe('season-2');
+      expect(updatedFee.type).toBe(MembershipFeeType.MONTHLY);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+});
\ No newline at end of file
diff --git a/core/payments/application/use-cases/index.test.ts b/core/payments/application/use-cases/index.test.ts
new file mode 100644
index 000000000..05563cf80
--- /dev/null
+++ b/core/payments/application/use-cases/index.test.ts
@@ -0,0 +1,28 @@
+import { describe, expect, it } from 'vitest';
+import * as useCases from './index';
+
+describe('payments use-cases barrel exports', () => {
+  it('re-exports all expected use cases', () => {
+    const exported = useCases as unknown as Record<string, unknown>;
+
+    const expectedExports = [
+      'AwardPrizeUseCase',
+      'CreatePaymentUseCase',
+      'CreatePrizeUseCase',
+      'DeletePrizeUseCase',
+      'GetMembershipFeesUseCase',
+      'GetPaymentsUseCase',
+      'GetPrizesUseCase',
+      'GetSponsorBillingUseCase',
+      'GetWalletUseCase',
+      'ProcessWalletTransactionUseCase',
+      'UpdateMemberPaymentUseCase',
+      'UpdatePaymentStatusUseCase',
+      'UpsertMembershipFeeUseCase',
+    ];
+
+    for (const name of expectedExports) {
+      expect(exported[name], `missing export: ${name}`).toBeDefined();
+    }
+  });
+});
\ No newline at end of file
diff --git a/core/racing/application/use-cases/GetSeasonSponsorshipsUseCase.test.ts b/core/racing/application/use-cases/GetSeasonSponsorshipsUseCase.test.ts
new file mode 100644
index 000000000..e6073cdab
--- /dev/null
+++ b/core/racing/application/use-cases/GetSeasonSponsorshipsUseCase.test.ts
@@ -0,0 +1,207 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  GetSeasonSponsorshipsUseCase,
+  type GetSeasonSponsorshipsInput,
+  type GetSeasonSponsorshipsResult,
+  type GetSeasonSponsorshipsErrorCode,
+} from './GetSeasonSponsorshipsUseCase';
+import type { ISeasonSponsorshipRepository } from '../../domain/repositories/ISeasonSponsorshipRepository';
+import type { ISeasonRepository } from '../../domain/repositories/ISeasonRepository';
+import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
+import type { ILeagueMembershipRepository } from '../../domain/repositories/ILeagueMembershipRepository';
+import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
+import { Season } from '../../domain/entities/season/Season';
+import { League } from '../../domain/entities/League';
+import { SeasonSponsorship } from '../../domain/entities/season/SeasonSponsorship';
+import { Money } from '../../domain/value-objects/Money';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+
+describe('GetSeasonSponsorshipsUseCase', () => {
+  let seasonSponsorshipRepository: {
+    findBySeasonId: Mock;
+  };
+  let seasonRepository: {
+    findById: Mock;
+  };
+  let leagueRepository: {
+    findById: Mock;
+  };
+  let leagueMembershipRepository: {
+    getLeagueMembers: Mock;
+  };
+  let raceRepository: {
+    findByLeagueId: Mock;
+  };
+
+  let output: UseCaseOutputPort<GetSeasonSponsorshipsResult> & { present: Mock };
+
+  let useCase: GetSeasonSponsorshipsUseCase;
+
+  beforeEach(() => {
+    seasonSponsorshipRepository = {
+      findBySeasonId: vi.fn(),
+    };
+    seasonRepository = {
+      findById: vi.fn(),
+    };
+    leagueRepository = {
+      findById: vi.fn(),
+    };
+    leagueMembershipRepository = {
+      getLeagueMembers: vi.fn(),
+    };
+    raceRepository = {
+      findByLeagueId: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    } as unknown as UseCaseOutputPort<GetSeasonSponsorshipsResult> & { present: Mock };
+
+    useCase = new GetSeasonSponsorshipsUseCase(
+      seasonSponsorshipRepository as unknown as ISeasonSponsorshipRepository,
+      seasonRepository as unknown as ISeasonRepository,
+      leagueRepository as unknown as ILeagueRepository,
+      leagueMembershipRepository as unknown as ILeagueMembershipRepository,
+      raceRepository as unknown as IRaceRepository,
+      output,
+    );
+  });
+
+  it('returns SEASON_NOT_FOUND when season does not exist', async () => {
+    const input: GetSeasonSponsorshipsInput = { seasonId: 'season-1' };
+
+    seasonRepository.findById.mockResolvedValue(null);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      GetSeasonSponsorshipsErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('SEASON_NOT_FOUND');
+    expect(err.details.message).toBe('Season not found');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns LEAGUE_NOT_FOUND when league for season does not exist', async () => {
+    const input: GetSeasonSponsorshipsInput = { seasonId: 'season-1' };
+
+    const season = Season.create({
+      id: 'season-1',
+      leagueId: 'league-1',
+      gameId: 'game-1',
+      name: 'Season 1',
+      status: 'active',
+    });
+
+    seasonRepository.findById.mockResolvedValue(season);
+    leagueRepository.findById.mockResolvedValue(null);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      GetSeasonSponsorshipsErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('LEAGUE_NOT_FOUND');
+    expect(err.details.message).toBe('League not found for season');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('presents sponsorship details with computed metrics', async () => {
+    const input: GetSeasonSponsorshipsInput = { seasonId: 'season-1' };
+
+    const season = Season.create({
+      id: 'season-1',
+      leagueId: 'league-1',
+      gameId: 'game-1',
+      name: 'Season 1',
+      status: 'active',
+      startDate: new Date('2025-01-01T00:00:00.000Z'),
+      endDate: new Date('2025-02-01T00:00:00.000Z'),
+    });
+
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'Test',
+      ownerId: 'owner-1',
+    });
+
+    const sponsorship = SeasonSponsorship.create({
+      id: 'sponsorship-1',
+      sponsorId: 'sponsor-1',
+      seasonId: 'season-1',
+      tier: 'main',
+      pricing: Money.create(1000, 'USD'),
+      activatedAt: new Date('2025-01-02T00:00:00.000Z'),
+      createdAt: new Date('2025-01-01T00:00:00.000Z'),
+    });
+
+    seasonRepository.findById.mockResolvedValue(season);
+    leagueRepository.findById.mockResolvedValue(league);
+    seasonSponsorshipRepository.findBySeasonId.mockResolvedValue([sponsorship]);
+
+    leagueMembershipRepository.getLeagueMembers.mockResolvedValue([
+      { driverId: 'driver-1' },
+      { driverId: 'driver-2' },
+      { driverId: 'driver-3' },
+    ]);
+
+    raceRepository.findByLeagueId.mockResolvedValue([
+      { id: 'race-1', status: 'completed' },
+      { id: 'race-2', status: 'completed' },
+      { id: 'race-3', status: 'scheduled' },
+    ]);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as Mock).mock.calls[0]?.[0] as GetSeasonSponsorshipsResult;
+
+    expect(presented.seasonId).toBe('season-1');
+    expect(presented.sponsorships).toHaveLength(1);
+
+    const detail = presented.sponsorships[0]!;
+    expect(detail.id).toBe('sponsorship-1');
+    expect(detail.leagueId).toBe('league-1');
+    expect(detail.leagueName).toBe('Test League');
+    expect(detail.seasonId).toBe('season-1');
+    expect(detail.seasonName).toBe('Season 1');
+    expect(detail.seasonStartDate).toEqual(new Date('2025-01-01T00:00:00.000Z'));
+    expect(detail.seasonEndDate).toEqual(new Date('2025-02-01T00:00:00.000Z'));
+    expect(detail.activatedAt).toEqual(new Date('2025-01-02T00:00:00.000Z'));
+
+    expect(detail.metrics.drivers).toBe(3);
+    expect(detail.metrics.races).toBe(3);
+    expect(detail.metrics.completedRaces).toBe(2);
+    expect(detail.metrics.impressions).toBe(2 * 3 * 100);
+
+    expect(detail.pricing).toEqual({ amount: 1000, currency: 'USD' });
+    expect(detail.platformFee).toEqual({ amount: 100, currency: 'USD' });
+    expect(detail.netAmount).toEqual({ amount: 900, currency: 'USD' });
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    const input: GetSeasonSponsorshipsInput = { seasonId: 'season-1' };
+
+    seasonRepository.findById.mockRejectedValue(new Error('DB error'));
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      GetSeasonSponsorshipsErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB error');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/racing/application/use-cases/GetSponsorUseCase.test.ts b/core/racing/application/use-cases/GetSponsorUseCase.test.ts
new file mode 100644
index 000000000..2db453027
--- /dev/null
+++ b/core/racing/application/use-cases/GetSponsorUseCase.test.ts
@@ -0,0 +1,88 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  GetSponsorUseCase,
+  type GetSponsorInput,
+  type GetSponsorResult,
+  type GetSponsorErrorCode,
+} from './GetSponsorUseCase';
+import type { ISponsorRepository } from '../../domain/repositories/ISponsorRepository';
+import { Sponsor } from '../../domain/entities/sponsor/Sponsor';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+
+describe('GetSponsorUseCase', () => {
+  let sponsorRepository: {
+    findById: Mock;
+  };
+
+  let output: UseCaseOutputPort<GetSponsorResult> & { present: Mock };
+
+  let useCase: GetSponsorUseCase;
+
+  beforeEach(() => {
+    sponsorRepository = {
+      findById: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    } as unknown as UseCaseOutputPort<GetSponsorResult> & { present: Mock };
+
+    useCase = new GetSponsorUseCase(
+      sponsorRepository as unknown as ISponsorRepository,
+      output,
+    );
+  });
+
+  it('presents sponsor when found', async () => {
+    const sponsor = Sponsor.create({
+      id: 'sponsor-1',
+      name: 'Test Sponsor',
+      contactEmail: 'test@example.com',
+    });
+
+    sponsorRepository.findById.mockResolvedValue(sponsor);
+
+    const input: GetSponsorInput = { sponsorId: 'sponsor-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(output.present).toHaveBeenCalledWith({ sponsor });
+  });
+
+  it('returns SPONSOR_NOT_FOUND when sponsor does not exist', async () => {
+    sponsorRepository.findById.mockResolvedValue(null);
+
+    const input: GetSponsorInput = { sponsorId: 'sponsor-404' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      GetSponsorErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('SPONSOR_NOT_FOUND');
+    expect(err.details.message).toBe('Sponsor not found');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    sponsorRepository.findById.mockRejectedValue(new Error('DB error'));
+
+    const input: GetSponsorInput = { sponsorId: 'sponsor-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      GetSponsorErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB error');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/racing/application/use-cases/ReopenRaceUseCase.test.ts b/core/racing/application/use-cases/ReopenRaceUseCase.test.ts
new file mode 100644
index 000000000..02c522f6e
--- /dev/null
+++ b/core/racing/application/use-cases/ReopenRaceUseCase.test.ts
@@ -0,0 +1,174 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  ReopenRaceUseCase,
+  type ReopenRaceInput,
+  type ReopenRaceResult,
+  type ReopenRaceErrorCode,
+} from './ReopenRaceUseCase';
+import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
+import type { Logger } from '@core/shared/application';
+import { Race } from '../../domain/entities/Race';
+import { SessionType } from '../../domain/value-objects/SessionType';
+import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+
+describe('ReopenRaceUseCase', () => {
+  let raceRepository: {
+    findById: Mock;
+    update: Mock;
+  };
+  let logger: {
+    debug: Mock;
+    warn: Mock;
+    info: Mock;
+    error: Mock;
+  };
+  let output: UseCaseOutputPort<ReopenRaceResult> & { present: Mock };
+
+  let useCase: ReopenRaceUseCase;
+
+  beforeEach(() => {
+    raceRepository = {
+      findById: vi.fn(),
+      update: vi.fn(),
+    };
+
+    logger = {
+      debug: vi.fn(),
+      warn: vi.fn(),
+      info: vi.fn(),
+      error: vi.fn(),
+    };
+
+    output = {
+      present: vi.fn(),
+    } as unknown as UseCaseOutputPort<ReopenRaceResult> & { present: Mock };
+
+    useCase = new ReopenRaceUseCase(
+      raceRepository as unknown as IRaceRepository,
+      logger as unknown as Logger,
+      output,
+    );
+  });
+
+  it('returns RACE_NOT_FOUND when race does not exist', async () => {
+    const input: ReopenRaceInput = { raceId: 'race-404', reopenedById: 'admin-1' };
+
+    raceRepository.findById.mockResolvedValue(null);
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      ReopenRaceErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('RACE_NOT_FOUND');
+    expect(err.details.message).toContain('race-404');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('reopens a completed race, persists, and presents the result', async () => {
+    const race = Race.create({
+      id: 'race-1',
+      leagueId: 'league-1',
+      scheduledAt: new Date('2025-01-01T00:00:00.000Z'),
+      track: 'Track 1',
+      car: 'Car 1',
+      sessionType: SessionType.main(),
+      status: 'completed',
+    });
+
+    raceRepository.findById.mockResolvedValue(race);
+    raceRepository.update.mockResolvedValue(race.reopen());
+
+    const input: ReopenRaceInput = { raceId: 'race-1', reopenedById: 'admin-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+
+    expect(raceRepository.update).toHaveBeenCalledWith(
+      expect.objectContaining({
+        id: 'race-1',
+        status: 'scheduled',
+      }),
+    );
+
+    expect(output.present).toHaveBeenCalledWith({
+      race: expect.objectContaining({
+        id: 'race-1',
+        status: 'scheduled',
+      }),
+    });
+
+    expect(logger.info).toHaveBeenCalled();
+  });
+
+  it('returns INVALID_RACE_STATE when race is already scheduled', async () => {
+    const race = Race.create({
+      id: 'race-1',
+      leagueId: 'league-1',
+      scheduledAt: new Date('2025-01-01T00:00:00.000Z'),
+      track: 'Track 1',
+      car: 'Car 1',
+      sessionType: SessionType.main(),
+      status: 'scheduled',
+    });
+
+    raceRepository.findById.mockResolvedValue(race);
+
+    const input: ReopenRaceInput = { raceId: 'race-1', reopenedById: 'admin-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      ReopenRaceErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('INVALID_RACE_STATE');
+    expect(err.details.message).toContain('already scheduled');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns INVALID_RACE_STATE when race is running', async () => {
+    const race = Race.create({
+      id: 'race-1',
+      leagueId: 'league-1',
+      scheduledAt: new Date('2025-01-01T00:00:00.000Z'),
+      track: 'Track 1',
+      car: 'Car 1',
+      sessionType: SessionType.main(),
+      status: 'running',
+    });
+
+    raceRepository.findById.mockResolvedValue(race);
+
+    const input: ReopenRaceInput = { raceId: 'race-1', reopenedById: 'admin-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      ReopenRaceErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('INVALID_RACE_STATE');
+    expect(err.details.message).toContain('running race');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws unexpected error', async () => {
+    raceRepository.findById.mockRejectedValue(new Error('DB error'));
+
+    const input: ReopenRaceInput = { raceId: 'race-1', reopenedById: 'admin-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      ReopenRaceErrorCode,
+      { message: string }
+    >;
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB error');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/core/racing/application/use-cases/WithdrawFromLeagueWalletUseCase.test.ts b/core/racing/application/use-cases/WithdrawFromLeagueWalletUseCase.test.ts
new file mode 100644
index 000000000..56f860b64
--- /dev/null
+++ b/core/racing/application/use-cases/WithdrawFromLeagueWalletUseCase.test.ts
@@ -0,0 +1,292 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  WithdrawFromLeagueWalletUseCase,
+  type WithdrawFromLeagueWalletErrorCode,
+  type WithdrawFromLeagueWalletInput,
+  type WithdrawFromLeagueWalletResult,
+} from './WithdrawFromLeagueWalletUseCase';
+import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
+import type { ILeagueWalletRepository } from '../../domain/repositories/ILeagueWalletRepository';
+import type { ITransactionRepository } from '../../domain/repositories/ITransactionRepository';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { League } from '../../domain/entities/League';
+import { LeagueWallet } from '../../domain/entities/league-wallet/LeagueWallet';
+import { Money } from '../../domain/value-objects/Money';
+
+describe('WithdrawFromLeagueWalletUseCase', () => {
+  let leagueRepository: { findById: Mock };
+  let walletRepository: { findByLeagueId: Mock; update: Mock };
+  let transactionRepository: { create: Mock };
+  let logger: Logger & { error: Mock };
+  let output: UseCaseOutputPort<WithdrawFromLeagueWalletResult> & { present: Mock };
+  let useCase: WithdrawFromLeagueWalletUseCase;
+
+  beforeEach(() => {
+    leagueRepository = { findById: vi.fn() };
+    walletRepository = { findByLeagueId: vi.fn(), update: vi.fn() };
+    transactionRepository = { create: vi.fn() };
+
+    logger = { error: vi.fn() } as unknown as Logger & { error: Mock };
+
+    output = { present: vi.fn() } as unknown as UseCaseOutputPort<WithdrawFromLeagueWalletResult> & {
+      present: Mock;
+    };
+
+    useCase = new WithdrawFromLeagueWalletUseCase(
+      leagueRepository as unknown as ILeagueRepository,
+      walletRepository as unknown as ILeagueWalletRepository,
+      transactionRepository as unknown as ITransactionRepository,
+      logger,
+      output,
+    );
+  });
+
+  it('returns LEAGUE_NOT_FOUND when league is missing', async () => {
+    leagueRepository.findById.mockResolvedValue(null);
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'owner-1',
+      amount: 100,
+      currency: 'USD',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      WithdrawFromLeagueWalletErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('LEAGUE_NOT_FOUND');
+    expect(err.details.message).toBe('League with id league-1 not found');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns WALLET_NOT_FOUND when wallet is missing', async () => {
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'desc',
+      ownerId: 'owner-1',
+    });
+
+    leagueRepository.findById.mockResolvedValue(league);
+    walletRepository.findByLeagueId.mockResolvedValue(null);
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'owner-1',
+      amount: 100,
+      currency: 'USD',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      WithdrawFromLeagueWalletErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('WALLET_NOT_FOUND');
+    expect(err.details.message).toBe('Wallet for league league-1 not found');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns UNAUTHORIZED_WITHDRAWAL when requester is not owner', async () => {
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'desc',
+      ownerId: 'owner-1',
+    });
+
+    const wallet = LeagueWallet.create({
+      id: 'wallet-1',
+      leagueId: 'league-1',
+      balance: Money.create(1000, 'USD'),
+    });
+
+    leagueRepository.findById.mockResolvedValue(league);
+    walletRepository.findByLeagueId.mockResolvedValue(wallet);
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'not-owner',
+      amount: 100,
+      currency: 'USD',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      WithdrawFromLeagueWalletErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('UNAUTHORIZED_WITHDRAWAL');
+    expect(err.details.message).toBe('Only the league owner can withdraw from the league wallet');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('returns INSUFFICIENT_FUNDS when wallet cannot withdraw amount', async () => {
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'desc',
+      ownerId: 'owner-1',
+    });
+
+    const wallet = LeagueWallet.create({
+      id: 'wallet-1',
+      leagueId: 'league-1',
+      balance: Money.create(100, 'USD'),
+    });
+
+    leagueRepository.findById.mockResolvedValue(league);
+    walletRepository.findByLeagueId.mockResolvedValue(wallet);
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'owner-1',
+      amount: 200,
+      currency: 'USD',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      WithdrawFromLeagueWalletErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('INSUFFICIENT_FUNDS');
+    expect(err.details.message).toBe('Insufficient balance for withdrawal');
+    expect(output.present).not.toHaveBeenCalled();
+  });
+
+  it('creates withdrawal transaction and updates wallet on success', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'desc',
+      ownerId: 'owner-1',
+    });
+
+    const startingBalance = Money.create(1000, 'USD');
+    const wallet = LeagueWallet.create({
+      id: 'wallet-1',
+      leagueId: 'league-1',
+      balance: startingBalance,
+    });
+
+    leagueRepository.findById.mockResolvedValue(league);
+    walletRepository.findByLeagueId.mockResolvedValue(wallet);
+    transactionRepository.create.mockResolvedValue(undefined);
+    walletRepository.update.mockResolvedValue(undefined);
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'owner-1',
+      amount: 250,
+      currency: 'USD',
+      reason: 'Payout',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(result.unwrap()).toBeUndefined();
+
+    expect(transactionRepository.create).toHaveBeenCalledTimes(1);
+    const createdTx = (transactionRepository.create as Mock).mock.calls[0]![0] as {
+      id: { toString(): string };
+      type: string;
+      amount: { amount: number; currency: string };
+      description: string | undefined;
+      metadata: Record<string, unknown> | undefined;
+      walletId: { toString(): string };
+    };
+
+    const expectedTransactionId = `txn-${new Date('2025-01-01T00:00:00.000Z').getTime()}`;
+
+    expect(createdTx.id.toString()).toBe(expectedTransactionId);
+    expect(createdTx.type).toBe('withdrawal');
+    expect(createdTx.amount.amount).toBe(250);
+    expect(createdTx.amount.currency).toBe('USD');
+    expect(createdTx.description).toBe('Payout');
+    expect(createdTx.metadata).toEqual({ reason: 'Payout', requestedById: 'owner-1' });
+    expect(createdTx.walletId.toString()).toBe(wallet.id.toString());
+
+    expect(walletRepository.update).toHaveBeenCalledTimes(1);
+    const updatedWallet = (walletRepository.update as Mock).mock.calls[0]![0] as LeagueWallet;
+
+    expect(updatedWallet.balance.amount).toBe(750);
+    expect(updatedWallet.balance.currency).toBe('USD');
+    expect(updatedWallet.getTransactionIds()).toContain(expectedTransactionId);
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as Mock).mock.calls[0]![0] as WithdrawFromLeagueWalletResult;
+
+    expect(presented.leagueId).toBe('league-1');
+    expect(presented.amount.amount).toBe(250);
+    expect(presented.amount.currency).toBe('USD');
+    expect(presented.transactionId).toBe(expectedTransactionId);
+    expect(presented.walletBalanceAfter.amount).toBe(750);
+    expect(presented.walletBalanceAfter.currency).toBe('USD');
+
+    const createOrder = (transactionRepository.create as Mock).mock.invocationCallOrder[0]!;
+    const updateOrder = (walletRepository.update as Mock).mock.invocationCallOrder[0]!;
+    expect(createOrder).toBeLessThan(updateOrder);
+
+    vi.useRealTimers();
+  });
+
+  it('returns REPOSITORY_ERROR and logs when repository throws', async () => {
+    const league = League.create({
+      id: 'league-1',
+      name: 'Test League',
+      description: 'desc',
+      ownerId: 'owner-1',
+    });
+
+    const wallet = LeagueWallet.create({
+      id: 'wallet-1',
+      leagueId: 'league-1',
+      balance: Money.create(1000, 'USD'),
+    });
+
+    leagueRepository.findById.mockResolvedValue(league);
+    walletRepository.findByLeagueId.mockResolvedValue(wallet);
+
+    transactionRepository.create.mockRejectedValue(new Error('DB down'));
+
+    const input: WithdrawFromLeagueWalletInput = {
+      leagueId: 'league-1',
+      requestedById: 'owner-1',
+      amount: 100,
+      currency: 'USD',
+    };
+
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+    const err = result.unwrapErr() as ApplicationErrorCode<
+      WithdrawFromLeagueWalletErrorCode,
+      { message: string }
+    >;
+
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB down');
+    expect(output.present).not.toHaveBeenCalled();
+    expect(logger.error).toHaveBeenCalledTimes(1);
+  });
+});
\ No newline at end of file
diff --git a/core/social/application/use-cases/GetCurrentUserSocialUseCase.test.ts b/core/social/application/use-cases/GetCurrentUserSocialUseCase.test.ts
new file mode 100644
index 000000000..ac7284045
--- /dev/null
+++ b/core/social/application/use-cases/GetCurrentUserSocialUseCase.test.ts
@@ -0,0 +1,118 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  GetCurrentUserSocialUseCase,
+  type GetCurrentUserSocialApplicationError,
+  type GetCurrentUserSocialInput,
+  type GetCurrentUserSocialResult,
+} from './GetCurrentUserSocialUseCase';
+import type { ISocialGraphRepository } from '../../domain/repositories/ISocialGraphRepository';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+import { Driver } from '@core/racing/domain/entities/Driver';
+
+describe('GetCurrentUserSocialUseCase', () => {
+  let socialGraphRepository: ISocialGraphRepository & { getFriends: Mock };
+  let logger: Logger & { debug: Mock; info: Mock; warn: Mock; error: Mock };
+  let output: UseCaseOutputPort<GetCurrentUserSocialResult> & { present: Mock };
+  let useCase: GetCurrentUserSocialUseCase;
+
+  beforeEach(() => {
+    socialGraphRepository = {
+      getFriends: vi.fn(),
+      getFriendIds: vi.fn(),
+      getSuggestedFriends: vi.fn(),
+    } as unknown as ISocialGraphRepository & { getFriends: Mock };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger & { debug: Mock; info: Mock; warn: Mock; error: Mock };
+
+    output = {
+      present: vi.fn(),
+    } as unknown as UseCaseOutputPort<GetCurrentUserSocialResult> & { present: Mock };
+
+    useCase = new GetCurrentUserSocialUseCase(socialGraphRepository, logger, output);
+  });
+
+  it('presents current user social with mapped friends', async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2025-01-01T00:00:00.000Z'));
+
+    const friends = [
+      Driver.create({
+        id: 'friend-1',
+        iracingId: '123',
+        name: 'Friend One',
+        country: 'US',
+      }),
+    ];
+
+    socialGraphRepository.getFriends.mockResolvedValue(friends);
+
+    const input: GetCurrentUserSocialInput = { driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(result.unwrap()).toBeUndefined();
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as Mock).mock.calls[0]![0] as GetCurrentUserSocialResult;
+
+    expect(presented.currentUser).toEqual({
+      driverId: 'driver-1',
+      displayName: '',
+      avatarUrl: '',
+      countryCode: '',
+    });
+
+    expect(presented.friends).toHaveLength(1);
+    expect(presented.friends[0]).toEqual({
+      driverId: 'friend-1',
+      displayName: 'Friend One',
+      avatarUrl: '',
+      countryCode: '',
+      isOnline: false,
+      lastSeen: new Date('2025-01-01T00:00:00.000Z'),
+    });
+
+    expect(logger.warn).not.toHaveBeenCalled();
+
+    vi.useRealTimers();
+  });
+
+  it('warns and presents empty friends list when no friends exist', async () => {
+    socialGraphRepository.getFriends.mockResolvedValue([]);
+
+    const input: GetCurrentUserSocialInput = { driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(output.present).toHaveBeenCalledTimes(1);
+
+    const presented = (output.present as Mock).mock.calls[0]![0] as GetCurrentUserSocialResult;
+    expect(presented.friends).toEqual([]);
+
+    expect(logger.warn).toHaveBeenCalledTimes(1);
+    expect((logger.warn as Mock).mock.calls[0]![0]).toBe(
+      'GetCurrentUserSocialUseCase.execute: No friends found for driverId: driver-1',
+    );
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    socialGraphRepository.getFriends.mockRejectedValue(new Error('DB error'));
+
+    const input: GetCurrentUserSocialInput = { driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+
+    const err = result.unwrapErr() as GetCurrentUserSocialApplicationError;
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect(logger.error).toHaveBeenCalledTimes(1);
+  });
+});
\ No newline at end of file
diff --git a/core/social/application/use-cases/GetUserFeedUseCase.test.ts b/core/social/application/use-cases/GetUserFeedUseCase.test.ts
new file mode 100644
index 000000000..0dbcd1062
--- /dev/null
+++ b/core/social/application/use-cases/GetUserFeedUseCase.test.ts
@@ -0,0 +1,113 @@
+import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
+import {
+  GetUserFeedUseCase,
+  type GetUserFeedApplicationError,
+  type GetUserFeedInput,
+  type GetUserFeedResult,
+} from './GetUserFeedUseCase';
+import type { IFeedRepository } from '../../domain/repositories/IFeedRepository';
+import type { FeedItem } from '../../domain/types/FeedItem';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
+
+describe('GetUserFeedUseCase', () => {
+  let feedRepository: IFeedRepository & { getFeedForDriver: Mock };
+  let logger: Logger & { debug: Mock; info: Mock; warn: Mock; error: Mock };
+  let output: UseCaseOutputPort<GetUserFeedResult> & { present: Mock };
+  let useCase: GetUserFeedUseCase;
+
+  beforeEach(() => {
+    feedRepository = {
+      getFeedForDriver: vi.fn(),
+      getGlobalFeed: vi.fn(),
+    } as unknown as IFeedRepository & { getFeedForDriver: Mock };
+
+    logger = {
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    } as unknown as Logger & { debug: Mock; info: Mock; warn: Mock; error: Mock };
+
+    output = {
+      present: vi.fn(),
+    } as unknown as UseCaseOutputPort<GetUserFeedResult> & { present: Mock };
+
+    useCase = new GetUserFeedUseCase(feedRepository, logger, output);
+  });
+
+  it('presents feed items when repository returns items', async () => {
+    const items: FeedItem[] = [
+      {
+        id: 'item-1',
+        timestamp: new Date('2025-01-01T00:00:00.000Z'),
+        type: 'friend-joined-league',
+        actorFriendId: 'friend-1',
+        leagueId: 'league-1',
+        headline: 'Friend joined a league',
+        body: 'Friend joined League 1',
+        ctaLabel: 'View league',
+        ctaHref: '/leagues/league-1',
+      },
+      {
+        id: 'item-2',
+        timestamp: new Date('2025-01-02T00:00:00.000Z'),
+        type: 'friend-finished-race',
+        actorDriverId: 'driver-2',
+        raceId: 'race-1',
+        position: 3,
+        headline: 'Race finished',
+      },
+    ];
+
+    feedRepository.getFeedForDriver.mockResolvedValue(items);
+
+    const input: GetUserFeedInput = { driverId: 'driver-1', limit: 10 };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(result.unwrap()).toBeUndefined();
+
+    expect(feedRepository.getFeedForDriver).toHaveBeenCalledTimes(1);
+    expect(feedRepository.getFeedForDriver).toHaveBeenCalledWith('driver-1', 10);
+
+    expect(output.present).toHaveBeenCalledTimes(1);
+    const presented = (output.present as Mock).mock.calls[0]![0] as GetUserFeedResult;
+    expect(presented.items).toEqual(items);
+
+    expect(logger.warn).not.toHaveBeenCalled();
+  });
+
+  it('warns and presents empty list when no items exist', async () => {
+    feedRepository.getFeedForDriver.mockResolvedValue([]);
+
+    const input: GetUserFeedInput = { driverId: 'driver-1' };
+    const result = await useCase.execute(input);
+
+    expect(result.isOk()).toBe(true);
+    expect(output.present).toHaveBeenCalledTimes(1);
+
+    const presented = (output.present as Mock).mock.calls[0]![0] as GetUserFeedResult;
+    expect(presented.items).toEqual([]);
+
+    expect(logger.warn).toHaveBeenCalledTimes(1);
+    expect((logger.warn as Mock).mock.calls[0]![0]).toBe(
+      'No feed items found for driverId: driver-1',
+    );
+  });
+
+  it('returns REPOSITORY_ERROR when repository throws', async () => {
+    feedRepository.getFeedForDriver.mockRejectedValue(new Error('DB error'));
+
+    const input: GetUserFeedInput = { driverId: 'driver-1', limit: 5 };
+    const result = await useCase.execute(input);
+
+    expect(result.isErr()).toBe(true);
+
+    const err = result.unwrapErr() as GetUserFeedApplicationError;
+    expect(err.code).toBe('REPOSITORY_ERROR');
+    expect(err.details.message).toBe('DB error');
+
+    expect(output.present).not.toHaveBeenCalled();
+    expect(logger.error).toHaveBeenCalledTimes(1);
+  });
+});
\ No newline at end of file