2. Foundation Models

[mrserverless]

• 2.1 Implement models/money.go with decimal support
  • Money struct with Amount (decimal.Decimal) and Currency (string)
  • Arithmetic operations (Add, Subtract, Multiply, Divide)
  • Comparison operations (Equal, GreaterThan, LessThan)
  • JSON marshaling/unmarshaling (string format)
  • Validation (currency code, negative amounts where appropriate)
• 2.2 Implement models/enums.go
  • AccountType (Checking, Savings, CreditCard, Investment)
  • TransactionType (Debit, Credit, Transfer, Payment, Fee)
  • ConsentStatus (Active, Expired, Revoked, Pending)
  • BalanceType (Current, Available, Pending)
• 2.3 Implement models/account.go
  • Account ID, account number, account type
  • Product name, nickname
  • Account status (open, closed, suspended)
  • Open date, close date (optional)
• 2.4 Implement models/balance.go
  • Balance type (current, available)
  • Amount (Money)
  • Timestamp
• 2.5 Implement models/transaction.go
  • Transaction ID, reference
  • Transaction type
  • Amount (Money)
  • Description, merchant name
  • Posting date, value date
  • Running balance (optional)
• 2.6 Implement models/consent.go
  • Consent ID
  • Status (ConsentStatus enum)
  • Scopes (string slice)
  • Grant date, expiry date
  • Revocation date (optional)
• 2.7 Write unit tests for Money model
  • Test arithmetic operations
  • Test JSON serialization/deserialization
  • Test currency validation
  • Test edge cases (zero, negative, very large amounts)
• 2.8 Write unit tests for enum validation

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