facadepattern

type CardTokenizer interface {
	Tokenize(ctx context.Context, cardNumber string, expiryMM, expiryYY int, cvv string) (token string, err error)
}

type ChargeRequest struct {
	Amount                     float64
	Currency                   string
	CardNumber                 string
	CardExpiryMM, CardExpiryYY int
	CVV                        string
	CustomerID                 string
	Metadata                   map[string]string
}

type ChargeResponse struct {
	TransactionID string
	Status        string
	ProviderRef   string
	Amount        float64
	Currency      string
	Timestamp     time.Time
}

type CurrencyConverter interface {
	Convert(ctx context.Context, amount float64, from, to string) (converted float64, err error)
}

type FixedConverter struct {
	TargetCurrency string
	Rate           float64
}

type FraudChecker interface {
	Check(ctx context.Context, req ChargeRequest) (ok bool, reason string, err error)
}

type GatewayClient interface {
	Charge(ctx context.Context, token string, amount float64, currency string, metadata map[string]string) (providedRef string, err error)
}

type HttpGateway struct {
}

type MemoryStore struct {
	// contains filtered or unexported fields
}

type PaymentFacade struct {
	// contains filtered or unexported fields
}

type SimpleFraud struct {
}

type SimpleTokenizer struct {
}

type TransactionStore interface {
	Save(ctx context.Context, resp ChargeResponse) error
}