[Enhancement] Add contract tests for the API layer against the OpenAPI specification

[RUKAYAT-CODER]

Overview

package.json exposes validate:openapi → node scripts/validateOpenApi.js, and src/types/api/schemas.ts plus src/services/api/validation.ts exist for runtime validation — but no workflow runs the validation script, and there is no test asserting that the TypeScript types in src/types/ match the specification. The 409 handler in axios.config.ts has a runtime shape guard precisely because the server contract is not otherwise enforced, which is the symptom of a missing contract test.

Specifications

Features:

• The OpenAPI specification validated in CI
• Generated or asserted types kept in sync with the specification
• Response validation applied at the client boundary for critical endpoints

Tasks:

• Add npm run validate:openapi as a CI step
• Generate types from the specification, or add a test asserting the hand-written types match it
• Apply the src/services/api/validation.ts guards to auth, payment and sync responses
• Extend src/services/api/__tests__/validation.test.ts with contract fixtures

Impacted Files:

• scripts/validateOpenApi.js
• src/types/api/schemas.ts
• src/services/api/validation.ts
• .github/workflows/ci.yml

Acceptance Criteria

• A specification change that breaks the client fails CI
• Critical responses are validated at runtime
• Types and specification cannot silently diverge

[bobo-24]

Hi! I’m a full-stack developer with a strong blockchain background, and I’m confident I can resolve this issue quickly and effectively. I’ll deliver a clean, reliable solution with immediate attention to detail, ensuring it’s completed as soon as possible. Please assign it to me—I’m ready to get started right away.

[webdevayo]

@webdevayo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello Chief, please assign this to me. I'd work on it extensively.

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[ahmadogo]

@ahmadogo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Good day

I have read the requirements of this issue and i am confident that i can solve this

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@ahmadogo's PR #1068 was approved and merged by @RUKAYAT-CODER.

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👏 Great work, @ahmadogo! Keep contributing to rinafcode.

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This issue has been completed by @ahmadogo as part of the Stellar Wave Program's 8th Wave 🥳

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