[Tech Debt] Remove entire credits system — credits will not be used

[sonikro]

Decision

The credits system will not be used in TF2-QuickServer. All credit-related code across core, providers, and entrypoints is dead weight. This issue tracks complete removal.

Note: This subsumes parts of #267 (BuyCredits command) and #276 (PayPal/Adyen payment integrations) — those can be resolved as part of this effort or handled together.

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Full Scope of Removal

Core layer (packages/core/)

Domain models (delete files):

• src/domain/CreditOrder.ts
• src/domain/CreditOrderRequest.ts
• src/domain/CreditsConfig.ts
• Remove CreditsConfig export from src/domain/index.ts

Repositories (delete files):

• src/repository/CreditOrdersRepository.ts
• src/repository/UserCreditsRepository.ts

Services (delete file):

• src/services/PaymentService.ts

Use cases (delete files + tests):

• src/usecase/ConsumeCreditsFromRunningServers.ts + .test.ts
• src/usecase/CreateCreditsPurchaseOrder.ts + .test.ts
• src/usecase/HandleOrderPaid.ts + .test.ts
• src/usecase/TerminateServersWithoutCredit.ts + .test.ts

Modify (do not delete):

• src/usecase/CreateServerForUser.ts — remove credit check block (lines ~85–94), remove userCreditsRepository dep
• src/utils/ConfigManager.ts — remove getCreditsConfig() method and CreditsConfig import
• index.ts — remove all exports for deleted files

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Providers layer (packages/providers/)

Delete files + tests:

• src/repository/SQliteCreditOrdersRepository.ts
• src/repository/SQliteUserCreditsRepository.ts
• src/services/AdyenPaymentService.ts + .test.ts
• src/services/PaypalPaymentService.ts + .test.ts
• src/services/PaypalPaymentServiceTypes.ts

Modify:

• src/repository/index.ts — remove exports for deleted repos
• src/services/index.ts — remove exports for deleted services
• src/utils/DefaultConfigManager.ts — remove getCreditsConfig() impl
• package.json — remove @adyen/api-library dependency

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Entrypoints layer (packages/entrypoints/)

Delete directories + tests:

• src/commands/BuyCredits/ (entire directory)
• src/commands/GetBalance/ (entire directory)

Delete files:

• src/jobs/ConsumeCreditsRoutine.ts + .test.ts
• src/jobs/TerminateServersWithoutCreditRoutine.ts + .test.ts
• src/http/middlewares/adyenMiddleware.ts
• src/http/middlewares/paypalMiddleware.ts
• src/http/middlewares/PayPalOrderApprovedWebhookPayload.ts

Modify:

• src/commands/index.ts — remove BuyCredits (commented out) and GetBalance command registrations
• src/jobs/index.ts — remove exports for deleted routines
• src/discordBot.ts — remove all instantiation of: SQliteUserCreditsRepository, SQliteCreditOrdersRepository, PaypalPaymentService, AdyenPaymentService, ConsumeCreditsFromRunningServers, TerminateServersWithoutCredit, CreateCreditsPurchaseOrder; remove all imports and wiring for these

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Migrations (migrations/)

⚠️ Do NOT delete existing migration files. Migrations are append-only. Instead, create new migration files that drop the tables:

• Create migrations/YYYYMMDDHHMMSS_drop_user_credits.ts — drops user_credits table
• Create migrations/YYYYMMDDHHMMSS_drop_credit_orders.ts — drops credit_orders table

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Config (config/)

• Remove credits block from config/default.json (currently { "credits": { "enabled": false } })

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Verify After Removal

• make test (or npm run test) must pass
• Build must succeed with no TypeScript errors
• No remaining references to credits, CreditOrder, UserCredits, PaymentService, ConsumeCredits, or TerminateServersWithoutCredit outside of git history