461 lines
12 KiB
Go
461 lines
12 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package stripecoinpayments
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import (
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"context"
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"fmt"
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"time"
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"github.com/stripe/stripe-go"
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"github.com/stripe/stripe-go/client"
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"github.com/zeebo/errs"
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"go.uber.org/zap"
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"gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/satellite/console"
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"storj.io/storj/satellite/payments"
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"storj.io/storj/satellite/payments/coinpayments"
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)
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var (
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// Error defines stripecoinpayments service error.
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Error = errs.Class("stripecoinpayments service error")
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mon = monkit.Package()
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)
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// Config stores needed information for payment service initialization.
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type Config struct {
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StripeSecretKey string `help:"stripe API secret key" default:""`
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CoinpaymentsPublicKey string `help:"coinpayments API public key" default:""`
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CoinpaymentsPrivateKey string `help:"coinpayments API private key key" default:""`
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TransactionUpdateInterval time.Duration `help:"amount of time we wait before running next transaction update loop" devDefault:"1m" releaseDefault:"30m"`
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AccountBalanceUpdateInterval time.Duration `help:"amount of time we wait before running next account balance update loop" devDefault:"3m" releaseDefault:"1h30m"`
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}
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// Service is an implementation for payment service via Stripe and Coinpayments.
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//
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// architecture: Service
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type Service struct {
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log *zap.Logger
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db DB
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projectsDB console.Projects
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stripeClient *client.API
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coinPayments *coinpayments.Client
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}
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// NewService creates a Service instance.
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func NewService(log *zap.Logger, config Config, db DB, projectsDB console.Projects) *Service {
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stripeClient := client.New(config.StripeSecretKey, nil)
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coinPaymentsClient := coinpayments.NewClient(
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coinpayments.Credentials{
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PublicKey: config.CoinpaymentsPublicKey,
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PrivateKey: config.CoinpaymentsPrivateKey,
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},
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)
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return &Service{
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log: log,
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db: db,
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projectsDB: projectsDB,
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stripeClient: stripeClient,
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coinPayments: coinPaymentsClient,
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}
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}
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// Accounts exposes all needed functionality to manage payment accounts.
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func (service *Service) Accounts() payments.Accounts {
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return &accounts{service: service}
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}
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// updateTransactionsLoop updates all pending transactions in a loop.
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func (service *Service) updateTransactionsLoop(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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const limit = 25
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before := time.Now()
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txsPage, err := service.db.Transactions().ListPending(ctx, 0, limit, before)
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if err != nil {
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return err
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}
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if err := service.updateTransactions(ctx, txsPage.IDList()); err != nil {
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return err
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}
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for txsPage.Next {
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if err = ctx.Err(); err != nil {
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return err
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}
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txsPage, err = service.db.Transactions().ListPending(ctx, txsPage.NextOffset, limit, before)
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if err != nil {
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return err
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}
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if err := service.updateTransactions(ctx, txsPage.IDList()); err != nil {
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return err
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}
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}
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return nil
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}
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// updateTransactions updates statuses and received amount for given transactions.
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func (service *Service) updateTransactions(ctx context.Context, ids coinpayments.TransactionIDList) (err error) {
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defer mon.Task()(&ctx, ids)(&err)
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if len(ids) == 0 {
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service.log.Debug("no transactions found, skipping update")
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return nil
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}
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infos, err := service.coinPayments.Transactions().ListInfos(ctx, ids)
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if err != nil {
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return err
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}
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var updates []TransactionUpdate
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var applies coinpayments.TransactionIDList
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for id, info := range infos {
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updates = append(updates,
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TransactionUpdate{
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TransactionID: id,
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Status: info.Status,
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Received: info.Received,
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},
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)
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// moment of transition to received state, which indicates
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// that customer funds were accepted, so we can apply this
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// amount to customer balance. So we create intent to update
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// customer balance in the future.
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if info.Status == coinpayments.StatusReceived {
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applies = append(applies, id)
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}
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}
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return service.db.Transactions().Update(ctx, updates, applies)
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}
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// applyAccountBalanceLoop fetches all unapplied transaction in a loop, applying transaction
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// received amount to stripe customer balance.
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func (service *Service) updateAccountBalanceLoop(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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const limit = 25
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before := time.Now()
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txsPage, err := service.db.Transactions().ListUnapplied(ctx, 0, limit, before)
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if err != nil {
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return err
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}
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for _, tx := range txsPage.Transactions {
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if err = ctx.Err(); err != nil {
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return err
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}
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if err = service.applyTransactionBalance(ctx, tx); err != nil {
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return err
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}
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}
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for txsPage.Next {
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if err = ctx.Err(); err != nil {
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return err
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}
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txsPage, err := service.db.Transactions().ListUnapplied(ctx, txsPage.NextOffset, limit, before)
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if err != nil {
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return err
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}
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for _, tx := range txsPage.Transactions {
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if err = ctx.Err(); err != nil {
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return err
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}
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if err = service.applyTransactionBalance(ctx, tx); err != nil {
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return err
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}
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}
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}
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return nil
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}
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// applyTransactionBalance applies transaction received amount to stripe customer balance.
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func (service *Service) applyTransactionBalance(ctx context.Context, tx Transaction) (err error) {
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defer mon.Task()(&ctx)(&err)
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cusID, err := service.db.Customers().GetCustomerID(ctx, tx.AccountID)
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if err != nil {
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return err
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}
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if err = service.db.Transactions().Consume(ctx, tx.ID); err != nil {
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return err
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}
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// TODO: add conversion logic
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amount, _ := tx.Received.Int64()
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params := &stripe.CustomerBalanceTransactionParams{
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Amount: stripe.Int64(amount),
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Customer: stripe.String(cusID),
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Currency: stripe.String(string(stripe.CurrencyUSD)),
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Description: stripe.String("storj token deposit"),
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}
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params.AddMetadata("txID", tx.ID.String())
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_, err = service.stripeClient.CustomerBalanceTransactions.New(params)
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return err
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}
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// PrepareInvoiceProjectRecords iterates through all projects and creates invoice records if
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// none exists.
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func (service *Service) PrepareInvoiceProjectRecords(ctx context.Context, period time.Time) (err error) {
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defer mon.Task()(&ctx)(&err)
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const limit = 25
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now := time.Now().UTC()
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utc := period.UTC()
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start := time.Date(utc.Year(), utc.Month(), 1, 0, 0, 0, 0, time.UTC)
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end := time.Date(utc.Year(), utc.Month()+1, 1, 0, 0, 0, 0, time.UTC)
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if end.After(now) {
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return Error.New("prepare is for past periods only")
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}
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projsPage, err := service.projectsDB.List(ctx, 0, limit, end)
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if err != nil {
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return Error.Wrap(err)
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}
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if err = service.createProjectRecords(ctx, projsPage.Projects, start, end); err != nil {
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return Error.Wrap(err)
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}
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for projsPage.Next {
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if err = ctx.Err(); err != nil {
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return Error.Wrap(err)
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}
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projsPage, err = service.projectsDB.List(ctx, projsPage.NextOffset, limit, end)
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if err != nil {
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return Error.Wrap(err)
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}
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if err = service.createProjectRecords(ctx, projsPage.Projects, start, end); err != nil {
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return Error.Wrap(err)
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}
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}
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return nil
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}
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// createProjectRecords creates invoice project record if none exists.
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func (service *Service) createProjectRecords(ctx context.Context, projects []console.Project, start, end time.Time) (err error) {
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defer mon.Task()(&ctx)(&err)
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var records []CreateProjectRecord
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for _, project := range projects {
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if err = ctx.Err(); err != nil {
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return err
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}
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if err = service.db.ProjectRecords().Check(ctx, project.ID, start, end); err != nil {
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if err == ErrProjectRecordExists {
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continue
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}
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return err
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}
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// TODO: account for usage data.
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records = append(records,
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CreateProjectRecord{
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ProjectID: project.ID,
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Storage: 0,
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Egress: 0,
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Objects: 0,
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},
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)
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}
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return service.db.ProjectRecords().Create(ctx, records, start, end)
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}
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// InvoiceApplyProjectRecords iterates through unapplied invoice project records and creates invoice line items
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// for stripe customer.
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func (service *Service) InvoiceApplyProjectRecords(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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const limit = 25
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before := time.Now()
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recordsPage, err := service.db.ProjectRecords().ListUnapplied(ctx, 0, limit, before)
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if err != nil {
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return Error.Wrap(err)
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}
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if err = service.applyProjectRecords(ctx, recordsPage.Records); err != nil {
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return Error.Wrap(err)
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}
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for recordsPage.Next {
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if err = ctx.Err(); err != nil {
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return Error.Wrap(err)
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}
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recordsPage, err = service.db.ProjectRecords().ListUnapplied(ctx, recordsPage.NextOffset, limit, before)
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if err != nil {
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return Error.Wrap(err)
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}
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if err = service.applyProjectRecords(ctx, recordsPage.Records); err != nil {
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return Error.Wrap(err)
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}
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}
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return nil
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}
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// applyProjectRecords applies invoice intents as invoice line items to stripe customer.
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func (service *Service) applyProjectRecords(ctx context.Context, records []ProjectRecord) (err error) {
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defer mon.Task()(&ctx)(&err)
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for _, record := range records {
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if err = ctx.Err(); err != nil {
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return err
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}
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proj, err := service.projectsDB.Get(ctx, record.ProjectID)
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if err != nil {
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return err
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}
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cusID, err := service.db.Customers().GetCustomerID(ctx, proj.OwnerID)
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if err != nil {
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if err == ErrNoCustomer {
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continue
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}
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return err
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}
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if err = service.createInvoiceItems(ctx, cusID, proj.Name, record); err != nil {
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return err
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}
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}
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return nil
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}
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// createInvoiceItems consumes invoice project record and creates invoice line items for stripe customer.
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func (service *Service) createInvoiceItems(ctx context.Context, cusID, projName string, record ProjectRecord) (err error) {
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defer mon.Task()(&ctx)(&err)
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if err = service.db.ProjectRecords().Consume(ctx, record.ID); err != nil {
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return err
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}
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// TODO: add and apply pricing.
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projectItem := &stripe.InvoiceItemParams{
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Amount: stripe.Int64(0),
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Currency: stripe.String(string(stripe.CurrencyUSD)),
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Customer: stripe.String(cusID),
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Description: stripe.String(fmt.Sprintf("project %s", projName)),
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Period: &stripe.InvoiceItemPeriodParams{
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End: stripe.Int64(record.PeriodEnd.Unix()),
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Start: stripe.Int64(record.PeriodStart.Unix()),
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},
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}
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projectItem.AddMetadata("projectID", record.ProjectID.String())
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_, err = service.stripeClient.InvoiceItems.New(projectItem)
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return err
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}
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// CreateInvoices lists through all customers and creates invoices.
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func (service *Service) CreateInvoices(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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const limit = 25
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before := time.Now()
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cusPage, err := service.db.Customers().List(ctx, 0, limit, before)
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if err != nil {
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return Error.Wrap(err)
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}
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for _, cus := range cusPage.Customers {
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if err = ctx.Err(); err != nil {
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return Error.Wrap(err)
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}
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if err = service.createInvoice(ctx, cus.ID); err != nil {
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return Error.Wrap(err)
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}
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}
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for cusPage.Next {
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if err = ctx.Err(); err != nil {
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return Error.Wrap(err)
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}
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cusPage, err = service.db.Customers().List(ctx, cusPage.NextOffset, limit, before)
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if err != nil {
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return Error.Wrap(err)
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}
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for _, cus := range cusPage.Customers {
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if err = ctx.Err(); err != nil {
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return Error.Wrap(err)
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}
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if err = service.createInvoice(ctx, cus.ID); err != nil {
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return Error.Wrap(err)
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}
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}
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}
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return nil
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}
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// createInvoice creates invoice for stripe customer. Returns nil error if there are no
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// pending invoice line items for customer.
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func (service *Service) createInvoice(ctx context.Context, cusID string) (err error) {
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defer mon.Task()(&ctx)(&err)
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_, err = service.stripeClient.Invoices.New(
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&stripe.InvoiceParams{
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Customer: stripe.String(cusID),
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AutoAdvance: stripe.Bool(true),
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},
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)
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if err != nil {
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if stripeErr, ok := err.(*stripe.Error); ok {
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switch stripeErr.Code {
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case stripe.ErrorCodeInvoiceNoCustomerLineItems:
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return nil
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default:
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return err
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}
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}
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}
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return nil
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}
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