storj/satellite/payments/stripecoinpayments/accounts.go
crawter c4cbc6ff2f satellite/payments: promotional coupons generation functional added
Change-Id: Ie0df256503114ca377d81bf7c8b26cc90a1f5b26
2020-01-20 11:01:55 +00:00

273 lines
8.2 KiB
Go

// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package stripecoinpayments
import (
"context"
"time"
"github.com/skyrings/skyring-common/tools/uuid"
"github.com/stripe/stripe-go"
"storj.io/common/memory"
"storj.io/storj/private/date"
"storj.io/storj/satellite/payments"
)
// ensures that accounts implements payments.Accounts.
var _ payments.Accounts = (*accounts)(nil)
// accounts is an implementation of payments.Accounts.
type accounts struct {
service *Service
}
// CreditCards exposes all needed functionality to manage account credit cards.
func (accounts *accounts) CreditCards() payments.CreditCards {
return &creditCards{service: accounts.service}
}
// Invoices exposes all needed functionality to manage account invoices.
func (accounts *accounts) Invoices() payments.Invoices {
return &invoices{service: accounts.service}
}
// Setup creates a payment account for the user.
// If account is already set up it will return nil.
func (accounts *accounts) Setup(ctx context.Context, userID uuid.UUID, email string) (err error) {
defer mon.Task()(&ctx, userID, email)(&err)
_, err = accounts.service.db.Customers().GetCustomerID(ctx, userID)
if err == nil {
return nil
}
params := &stripe.CustomerParams{
Email: stripe.String(email),
}
customer, err := accounts.service.stripeClient.Customers.New(params)
if err != nil {
return Error.Wrap(err)
}
// TODO: delete customer from stripe, if db insertion fails
return Error.Wrap(accounts.service.db.Customers().Insert(ctx, userID, customer.ID))
}
// Balance returns an integer amount in cents that represents the current balance of payment account.
func (accounts *accounts) Balance(ctx context.Context, userID uuid.UUID) (_ int64, err error) {
defer mon.Task()(&ctx, userID)(&err)
customerID, err := accounts.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return 0, Error.Wrap(err)
}
c, err := accounts.service.stripeClient.Customers.Get(customerID, nil)
if err != nil {
return 0, Error.Wrap(err)
}
// add all active coupons amount to balance.
coupons, err := accounts.service.db.Coupons().ListByUserIDAndStatus(ctx, userID, payments.CouponActive)
if err != nil {
return 0, Error.Wrap(err)
}
var couponsAmount int64 = 0
for _, coupon := range coupons {
alreadyUsed, err := accounts.service.db.Coupons().TotalUsage(ctx, coupon.ID)
if err != nil {
return 0, Error.Wrap(err)
}
couponsAmount += coupon.Amount - alreadyUsed
}
return -c.Balance + couponsAmount, nil
}
// AddCoupon attaches a coupon for payment account.
func (accounts *accounts) AddCoupon(ctx context.Context, userID, projectID uuid.UUID, amount int64, duration int, description string, couponType payments.CouponType) (err error) {
defer mon.Task()(&ctx, userID, amount, duration, description, couponType)(&err)
coupon := payments.Coupon{
UserID: userID,
Status: payments.CouponActive,
ProjectID: projectID,
Amount: amount,
Description: description,
Duration: duration,
Type: couponType,
}
return Error.Wrap(accounts.service.db.Coupons().Insert(ctx, coupon))
}
// ProjectCharges returns how much money current user will be charged for each project.
func (accounts *accounts) ProjectCharges(ctx context.Context, userID uuid.UUID) (charges []payments.ProjectCharge, err error) {
defer mon.Task()(&ctx, userID)(&err)
// to return empty slice instead of nil if there are no projects
charges = make([]payments.ProjectCharge, 0)
projects, err := accounts.service.projectsDB.GetOwn(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
start, end := date.MonthBoundary(time.Now().UTC())
// TODO: we should improve performance of this block of code. It takes ~4-5 sec to get project charges.
for _, project := range projects {
usage, err := accounts.service.usageDB.GetProjectTotal(ctx, project.ID, start, end)
if err != nil {
return charges, Error.Wrap(err)
}
charges = append(charges, payments.ProjectCharge{
ProjectID: project.ID,
// TODO: check precision
Egress: usage.Egress * accounts.service.EgressPrice / int64(memory.TB),
ObjectCount: int64(usage.ObjectCount * float64(accounts.service.PerObjectPrice)),
StorageGbHrs: int64(usage.Storage*float64(accounts.service.TBhPrice)) / int64(memory.TB),
})
}
return charges, nil
}
// Charges returns list of all credit card charges related to account.
func (accounts *accounts) Charges(ctx context.Context, userID uuid.UUID) (_ []payments.Charge, err error) {
defer mon.Task()(&ctx, userID)(&err)
customerID, err := accounts.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
params := &stripe.ChargeListParams{
Customer: stripe.String(customerID),
}
params.Filters.AddFilter("limit", "", "100")
iter := accounts.service.stripeClient.Charges.List(params)
var charges []payments.Charge
for iter.Next() {
charge := iter.Charge()
// ignore all non credit card charges
if charge.PaymentMethodDetails.Type != stripe.ChargePaymentMethodDetailsTypeCard {
continue
}
if charge.PaymentMethodDetails.Card == nil {
continue
}
charges = append(charges, payments.Charge{
ID: charge.ID,
Amount: charge.Amount,
CardInfo: payments.CardInfo{
ID: charge.PaymentMethod,
Brand: string(charge.PaymentMethodDetails.Card.Brand),
LastFour: charge.PaymentMethodDetails.Card.Last4,
},
CreatedAt: time.Unix(charge.Created, 0).UTC(),
})
}
if err = iter.Err(); err != nil {
return nil, Error.Wrap(err)
}
return charges, nil
}
// Coupons return list of all coupons of specified payment account.
func (accounts *accounts) Coupons(ctx context.Context, userID uuid.UUID) (coupons []payments.Coupon, err error) {
defer mon.Task()(&ctx, userID)(&err)
coupons, err = accounts.service.db.Coupons().ListByUserID(ctx, userID)
return coupons, Error.Wrap(err)
}
// PopulatePromotionalCoupons is used to populate promotional coupons through all active users who already have
// a project, payment method and do not have a promotional coupon yet.
// And updates project limits to selected size.
func (accounts *accounts) PopulatePromotionalCoupons(ctx context.Context, duration int, amount int64, projectLimit memory.Size) (err error) {
defer mon.Task()(&ctx, duration, amount, projectLimit)(&err)
const limit = 50
before := time.Now()
cusPage, err := accounts.service.db.Customers().List(ctx, 0, limit, before)
if err != nil {
return Error.Wrap(err)
}
// taking only users that attached a payment method.
var usersIDs []uuid.UUID
for _, cus := range cusPage.Customers {
params := &stripe.PaymentMethodListParams{
Type: stripe.String(string(stripe.PaymentMethodTypeCard)),
Customer: stripe.String(cus.ID),
}
paymentMethodsIterator := accounts.service.stripeClient.PaymentMethods.List(params)
for paymentMethodsIterator.Next() {
// if user has at least 1 payment method - break a loop.
usersIDs = append(usersIDs, cus.UserID)
break
}
if err = paymentMethodsIterator.Err(); err != nil {
return Error.Wrap(err)
}
}
err = accounts.service.db.Coupons().PopulatePromotionalCoupons(ctx, usersIDs, duration, amount, projectLimit)
if err != nil {
return Error.Wrap(err)
}
for cusPage.Next {
// we have to wait before each iteration because
// Stripe has rate limits - 100 read and 100 write operations per second per secret key.
time.Sleep(time.Second)
var usersIDs []uuid.UUID
for _, cus := range cusPage.Customers {
params := &stripe.PaymentMethodListParams{
Type: stripe.String(string(stripe.PaymentMethodTypeCard)),
Customer: stripe.String(cus.ID),
}
paymentMethodsIterator := accounts.service.stripeClient.PaymentMethods.List(params)
for paymentMethodsIterator.Next() {
usersIDs = append(usersIDs, cus.UserID)
break
}
if err = paymentMethodsIterator.Err(); err != nil {
return Error.Wrap(err)
}
}
err = accounts.service.db.Coupons().PopulatePromotionalCoupons(ctx, usersIDs, duration, amount, projectLimit)
if err != nil {
return Error.Wrap(err)
}
}
return nil
}
// StorjTokens exposes all storj token related functionality.
func (accounts *accounts) StorjTokens() payments.StorjTokens {
return &storjTokens{service: accounts.service}
}