4. Mock Provider Implementation

[mrserverless]

• 4.1 Implement providers/mock/provider.go
  • MockProvider struct
  • Implements all domain interfaces (AccountService, TransactionService, BalanceService, ConsentService)
  • In-memory data storage (maps keyed by ID)
  • NewMockProvider() constructor with sample data
• 4.2 Create sample data
  • 3 sample accounts (checking, savings, credit card)
  • Multi-currency accounts (AUD, USD)
  • Realistic account numbers, names, balances
• 4.3 Create sample transactions
  • 11 sample transactions distributed across accounts
  • Various transaction types (debit, credit, transfer, payment, fee)
  • Realistic merchants (groceries, utilities, salary, ATM, etc.)
  • Date range: last 90 days
  • Running balances calculated correctly
• 4.4 Create sample consents
  • 3 sample consents (1 active, 1 expired, 1 revoked)
  • Realistic scopes (account:read, transaction:read, balance:read)
  • Date ranges (grant, expiry, revocation)
• 4.5 Implement AccountService methods
  • RetrieveCurrentAccount - lookup by ID, return error if not found
  • RetrieveCurrentAccountBalance - return current balance
• 4.6 Implement TransactionService methods
  • RetrievePaymentTransaction - lookup by ID
  • RetrievePaymentTransactionHistory - filter by account, date range, pagination
• 4.7 Implement BalanceService methods
  • RetrieveAccountBalance - return current and available balances
• 4.8 Implement ConsentService methods
  • RetrieveConsent - lookup by ID
  • RetrieveConsentStatus - return status only
• 4.9 Write integration tests for mock provider
  • Test all service operations with sample data
  • Test error cases (not found, invalid inputs)
  • Test pagination and filtering

Source: openspec/changes/bootstrap-mvp-foundation/tasks.md