billing

Documentation

Index

• Constants
• Variables
• func CalculateBonusAmount(amount currency.Amount, bonusRate int64) currency.Amount
• type Chore
  • func NewChore(log *zap.Logger, paymentTypes []PaymentType, transactionsDB TransactionsDB, ...) *Chore
  • func (chore *Chore) Close() (err error)
  • func (chore *Chore) Run(ctx context.Context) (err error)
  • func (chore *Chore) TestSetPaymentTypes(types []PaymentType)
• type ChoreObservers
• type Config
• type Observer
• type PaymentType
• type Transaction
• type TransactionStatus
• type TransactionType
• type TransactionsDB

Constants

const (
	// TransactionStatusPending indicates that status of this transaction is pending.
	TransactionStatusPending = "pending"
	// TransactionStatusCancelled indicates that status of this transaction is cancelled.
	TransactionStatusCancelled = "cancelled"
	// TransactionStatusCompleted indicates that status of this transaction is complete.
	TransactionStatusCompleted = "complete"
)

const (
	// TransactionTypeCredit indicates that type of this transaction is credit.
	TransactionTypeCredit = "credit"
	// TransactionTypeDebit indicates that type of this transaction is debit.
	TransactionTypeDebit = "debit"
	// TransactionTypeUnknown indicates that type of this transaction is unknown.
	TransactionTypeUnknown = "unknown"
)

const (
	StripeSource         = "stripe"
	StorjScanSource      = "storjscan"
	StorjScanBonusSource = "storjscanbonus"
)

Well-known PaymentType sources.

Variables

var ChoreErr = errs.Class("billing chore")

ChoreErr is billing chore err class.

var ErrInsufficientFunds = errs.New("Insufficient funds for this transaction")

ErrInsufficientFunds represents err when a user balance is too low for some transaction.

var ErrNoTransactions = errs.New("no transactions in the database")

ErrNoTransactions represents err when there is no billing transactions in the DB.

var ErrNoWallet = errs.New("wallet does not exists")

ErrNoWallet represents err when there is no wallet in the DB.

Functions

func CalculateBonusAmount

func CalculateBonusAmount(amount currency.Amount, bonusRate int64) currency.Amount

CalculateBonusAmount calculates bonus for given currency amount and bonus rate.

Types

type Chore

type Chore struct {
	TransactionCycle *sync2.Cycle
	// contains filtered or unexported fields
}

Chore periodically queries for new billing transactions from payment type.

architecture: Chore

func NewChore

func NewChore(log *zap.Logger, paymentTypes []PaymentType, transactionsDB TransactionsDB, interval time.Duration, disableLoop bool, bonusRate int64, observers ChoreObservers) *Chore

NewChore creates new chore.

func (*Chore) Close

func (chore *Chore) Close() (err error)

Close closes all underlying resources.

func (*Chore) Run

func (chore *Chore) Run(ctx context.Context) (err error)

Run runs billing transaction loop.

func (*Chore) TestSetPaymentTypes

func (chore *Chore) TestSetPaymentTypes(types []PaymentType)

TestSetPaymentTypes is used in tests to change the payment types this chore tracks.

type ChoreObservers

type ChoreObservers struct {
	UpgradeUser Observer
	PayInvoices Observer
}

ChoreObservers holds functionality to process confirmed transactions using different types of observers.

type Config

type Config struct {
	Interval    time.Duration `help:"billing chore interval to query for new transactions from all payment types" default:"15s"`
	DisableLoop bool          `help:"flag to disable querying for new billing transactions by billing chore" default:"true"`
}

Config stores needed information for billing service initialization.

type Observer

type Observer interface {
	// Process is called repeatedly for each transaction.
	Process(context.Context, Transaction) error
}

Observer processes a billing transaction.

type PaymentType

type PaymentType interface {
	// Source the source of the payment
	Source() string
	// Type the type of the payment
	Type() TransactionType
	// GetNewTransactions returns new transactions that occurred after the provided last transaction received.
	GetNewTransactions(ctx context.Context, lastTransactionTime time.Time, metadata []byte) ([]Transaction, error)
}

PaymentType is an interface which defines functionality required for all billing payment types. Payment types can include but are not limited to Bitcoin, Ether, credit or debit card, ACH transfer, or even physical transfer of live goats. In each case, a source, type, and method to get new transactions must be defined by the service, though metadata specific to each payment type is also supported (i.e. goat hair type).

type Transaction

type Transaction struct {
	ID          int64
	UserID      uuid.UUID
	Amount      currency.Amount
	Description string
	Source      string
	Status      TransactionStatus
	Type        TransactionType
	Metadata    []byte
	Timestamp   time.Time
	CreatedAt   time.Time
}

Transaction defines billing related transaction info that is stored in the DB.

type TransactionStatus

type TransactionStatus string

TransactionStatus indicates transaction status.

type TransactionType

type TransactionType string

TransactionType indicates transaction type.

type TransactionsDB

type TransactionsDB interface {
	// Insert inserts the provided primary transaction along with zero or more
	// supplemental transactions that. This is NOT intended for bulk insertion,
	// but rather to provide an atomic commit of one or more _related_
	// transactions.
	Insert(ctx context.Context, primaryTx Transaction, supplementalTx ...Transaction) (txIDs []int64, err error)
	// UpdateStatus updates the status of the transaction.
	UpdateStatus(ctx context.Context, txID int64, status TransactionStatus) error
	// UpdateMetadata updates the metadata of the transaction.
	UpdateMetadata(ctx context.Context, txID int64, metadata []byte) error
	// LastTransaction returns the timestamp and metadata of the last known transaction for given source and type.
	LastTransaction(ctx context.Context, txSource string, txType TransactionType) (time.Time, []byte, error)
	// List returns all transactions for the specified user.
	List(ctx context.Context, userID uuid.UUID) ([]Transaction, error)
	// ListSource returns all transactions for the specified user and source.
	ListSource(ctx context.Context, userID uuid.UUID, txSource string) ([]Transaction, error)
	// GetBalance returns the current usable balance for the specified user.
	GetBalance(ctx context.Context, userID uuid.UUID) (currency.Amount, error)
}

TransactionsDB is an interface which defines functionality of DB which stores billing transactions.

architecture: Database