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alby.go
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alby.go
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package main
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"net/url"
"strconv"
"github.com/labstack/echo-contrib/session"
"github.com/labstack/echo/v4"
"github.com/sirupsen/logrus"
"golang.org/x/oauth2"
"gorm.io/gorm"
)
type AlbyOAuthService struct {
cfg *Config
oauthConf *oauth2.Config
db *gorm.DB
Logger *logrus.Logger
}
func NewAlbyOauthService(svc *Service, e *echo.Echo) (result *AlbyOAuthService, err error) {
conf := &oauth2.Config{
ClientID: svc.cfg.AlbyClientId,
ClientSecret: svc.cfg.AlbyClientSecret,
//Todo: do we really need all these permissions?
Scopes: []string{"account:read", "payments:send", "invoices:read", "transactions:read", "invoices:create", "balance:read"},
Endpoint: oauth2.Endpoint{
TokenURL: svc.cfg.OAuthTokenUrl,
AuthURL: svc.cfg.OAuthAuthUrl,
AuthStyle: 2, // use HTTP Basic Authorization https://pkg.go.dev/golang.org/x/oauth2#AuthStyle
},
RedirectURL: svc.cfg.OAuthRedirectUrl,
}
albySvc := &AlbyOAuthService{
cfg: svc.cfg,
oauthConf: conf,
db: svc.db,
Logger: svc.Logger,
}
e.GET("/alby/auth", albySvc.AuthHandler)
e.GET("/alby/callback", albySvc.CallbackHandler)
return albySvc, err
}
func (svc *AlbyOAuthService) FetchUserToken(ctx context.Context, app App) (token *oauth2.Token, err error) {
user := app.User
tok, err := svc.oauthConf.TokenSource(ctx, &oauth2.Token{
AccessToken: user.AccessToken,
RefreshToken: user.RefreshToken,
Expiry: user.Expiry,
}).Token()
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": app.NostrPubkey,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Token error: %v", err)
return nil, err
}
// we always update the user's token for future use
// the oauth library handles the token refreshing
user.AccessToken = tok.AccessToken
user.RefreshToken = tok.RefreshToken
user.Expiry = tok.Expiry // TODO; probably needs some calculation
err = svc.db.Save(&user).Error
if err != nil {
svc.Logger.WithError(err).Error("Error saving user")
return nil, err
}
return tok, nil
}
func (svc *AlbyOAuthService) MakeInvoice(ctx context.Context, senderPubkey string, amount int64, description string, descriptionHash string, expiry int64) (transaction *Nip47Transaction, err error) {
// TODO: move to a shared function
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
}).Errorf("App not found: %v", err)
return nil, err
}
// amount provided in msat, but Alby API currently only supports sats. Will get truncated to a whole sat value
var amountSat int64 = amount / 1000
// make sure amount is not converted to 0
if amount > 0 && amountSat == 0 {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
}).Errorf("amount must be 1000 msat or greater")
return nil, errors.New("amount must be 1000 msat or greater")
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Processing make invoice request")
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return nil, err
}
client := svc.oauthConf.Client(ctx, tok)
body := bytes.NewBuffer([]byte{})
payload := &MakeInvoiceRequest{
Amount: amountSat,
Description: description,
DescriptionHash: descriptionHash,
// TODO: support expiry
}
err = json.NewEncoder(body).Encode(payload)
// TODO: move to a shared function
req, err := http.NewRequest("POST", fmt.Sprintf("%s/invoices", svc.cfg.AlbyAPIURL), body)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /invoices")
return nil, err
}
// TODO: move to creation of HTTP client
req.Header.Set("User-Agent", "NWC")
req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Failed to make invoice: %v", err)
return nil, err
}
if resp.StatusCode < 300 {
responsePayload := &AlbyInvoice{}
err = json.NewDecoder(resp.Body).Decode(responsePayload)
if err != nil {
return nil, err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
"appId": app.ID,
"userId": app.User.ID,
"paymentRequest": responsePayload.PaymentRequest,
"paymentHash": responsePayload.PaymentHash,
}).Info("Make invoice successful")
transaction := albyInvoiceToTransaction(responsePayload)
return transaction, nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"amount": amount,
"description": description,
"descriptionHash": descriptionHash,
"expiry": expiry,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
}).Errorf("Make invoice failed %s", string(errorPayload.Message))
return nil, errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) LookupInvoice(ctx context.Context, senderPubkey string, paymentHash string) (transaction *Nip47Transaction, err error) {
// TODO: move to a shared function
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"paymentHash": paymentHash,
}).Errorf("App not found: %v", err)
return nil, err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"paymentHash": paymentHash,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Processing lookup invoice request")
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return nil, err
}
client := svc.oauthConf.Client(ctx, tok)
body := bytes.NewBuffer([]byte{})
// TODO: move to a shared function
req, err := http.NewRequest("GET", fmt.Sprintf("%s/invoices/%s", svc.cfg.AlbyAPIURL, paymentHash), body)
if err != nil {
svc.Logger.WithError(err).Errorf("Error creating request /invoices/%s", paymentHash)
return nil, err
}
req.Header.Set("User-Agent", "NWC")
req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"paymentHash": paymentHash,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Failed to lookup invoice: %v", err)
return nil, err
}
if resp.StatusCode < 300 {
responsePayload := &AlbyInvoice{}
err = json.NewDecoder(resp.Body).Decode(responsePayload)
if err != nil {
return nil, err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"paymentHash": paymentHash,
"appId": app.ID,
"userId": app.User.ID,
"paymentRequest": responsePayload.PaymentRequest,
"settled": responsePayload.Settled,
}).Info("Lookup invoice successful")
transaction = albyInvoiceToTransaction(responsePayload)
return transaction, nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"paymentHash": paymentHash,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
}).Errorf("Lookup invoice failed %s", string(errorPayload.Message))
return nil, errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) GetInfo(ctx context.Context, senderPubkey string) (info *NodeInfo, err error) {
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
}).Errorf("App not found: %v", err)
return nil, err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Info fetch successful")
return &NodeInfo{
Alias: "getalby.com",
Color: "",
Pubkey: "",
Network: "mainnet",
BlockHeight: 0,
BlockHash: "",
}, err
}
func (svc *AlbyOAuthService) GetBalance(ctx context.Context, senderPubkey string) (balance int64, err error) {
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
}).Errorf("App not found: %v", err)
return 0, err
}
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return 0, err
}
client := svc.oauthConf.Client(ctx, tok)
req, err := http.NewRequest("GET", fmt.Sprintf("%s/balance", svc.cfg.AlbyAPIURL), nil)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /balance")
return 0, err
}
req.Header.Set("User-Agent", "NWC")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Failed to fetch balance: %v", err)
return 0, err
}
if resp.StatusCode < 300 {
responsePayload := &BalanceResponse{}
err = json.NewDecoder(resp.Body).Decode(responsePayload)
if err != nil {
return 0, err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Balance fetch successful")
return int64(responsePayload.Balance), nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
}).Errorf("Balance fetch failed %s", string(errorPayload.Message))
return 0, errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) ListTransactions(ctx context.Context, senderPubkey string, from, until, limit, offset uint64, unpaid bool, invoiceType string) (transactions []Nip47Transaction, err error) {
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
}).Errorf("App not found: %v", err)
return nil, err
}
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return nil, err
}
client := svc.oauthConf.Client(ctx, tok)
urlParams := url.Values{}
//urlParams.Add("page", "1")
// TODO: clarify gt/lt vs from to in NWC spec
if from != 0 {
urlParams.Add("q[created_at_gt]", strconv.FormatUint(from, 10))
}
if until != 0 {
urlParams.Add("q[created_at_lt]", strconv.FormatUint(until, 10))
}
if limit != 0 {
urlParams.Add("items", strconv.FormatUint(limit, 10))
}
// TODO: Add Offset and Unpaid
endpoint := "/invoices"
switch invoiceType {
case "incoming":
endpoint += "/incoming"
case "outgoing":
endpoint += "/outgoing"
}
requestUrl := fmt.Sprintf("%s%s?%s", svc.cfg.AlbyAPIURL, endpoint, urlParams.Encode())
req, err := http.NewRequest("GET", requestUrl, nil)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /invoices")
return nil, err
}
req.Header.Set("User-Agent", "NWC")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
"requestUrl": requestUrl,
}).Errorf("Failed to fetch invoices: %v", err)
return nil, err
}
var invoices []AlbyInvoice
if resp.StatusCode < 300 {
err = json.NewDecoder(resp.Body).Decode(&invoices)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
"requestUrl": requestUrl,
}).Errorf("Failed to decode invoices: %v", err)
return nil, err
}
transactions = []Nip47Transaction{}
for _, invoice := range invoices {
transaction := albyInvoiceToTransaction(&invoice)
transactions = append(transactions, *transaction)
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
"requestUrl": requestUrl,
}).Info("List transactions successful")
return transactions, nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
"requestUrl": requestUrl,
}).Errorf("List transactions failed %s", string(errorPayload.Message))
return nil, errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) SendPaymentSync(ctx context.Context, senderPubkey, payReq string) (preimage string, err error) {
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"bolt11": payReq,
}).Errorf("App not found: %v", err)
return "", err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"bolt11": payReq,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Processing payment request")
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return "", err
}
client := svc.oauthConf.Client(ctx, tok)
body := bytes.NewBuffer([]byte{})
payload := &PayRequest{
Invoice: payReq,
}
err = json.NewEncoder(body).Encode(payload)
req, err := http.NewRequest("POST", fmt.Sprintf("%s/payments/bolt11", svc.cfg.AlbyAPIURL), body)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /payments/bolt11")
return "", err
}
req.Header.Set("User-Agent", "NWC")
req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"bolt11": payReq,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Failed to pay invoice: %v", err)
return "", err
}
if resp.StatusCode < 300 {
responsePayload := &PayResponse{}
err = json.NewDecoder(resp.Body).Decode(responsePayload)
if err != nil {
return "", err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"bolt11": payReq,
"appId": app.ID,
"userId": app.User.ID,
"paymentHash": responsePayload.PaymentHash,
}).Info("Payment successful")
return responsePayload.Preimage, nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"bolt11": payReq,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
}).Errorf("Payment failed %s", string(errorPayload.Message))
return "", errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) SendKeysend(ctx context.Context, senderPubkey string, amount int64, destination, preimage string, custom_records []TLVRecord) (preImage string, err error) {
app := App{}
err = svc.db.Preload("User").First(&app, &App{
NostrPubkey: senderPubkey,
}).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"payeePubkey": destination,
}).Errorf("App not found: %v", err)
return "", err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"payeePubkey": destination,
"appId": app.ID,
"userId": app.User.ID,
}).Info("Processing keysend request")
tok, err := svc.FetchUserToken(ctx, app)
if err != nil {
return "", err
}
client := svc.oauthConf.Client(ctx, tok)
customRecordsMap := make(map[string]string)
for _, record := range custom_records {
customRecordsMap[strconv.FormatUint(record.Type, 10)] = record.Value
}
body := bytes.NewBuffer([]byte{})
payload := &KeysendRequest{
Amount: amount,
Destination: destination,
CustomRecords: customRecordsMap,
}
err = json.NewEncoder(body).Encode(payload)
// here we don't use the preimage from params
req, err := http.NewRequest("POST", fmt.Sprintf("%s/payments/keysend", svc.cfg.AlbyAPIURL), body)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /payments/keysend")
return "", err
}
req.Header.Set("User-Agent", "NWC")
req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"payeePubkey": destination,
"appId": app.ID,
"userId": app.User.ID,
}).Errorf("Failed to pay keysend: %v", err)
return "", err
}
if resp.StatusCode < 300 {
responsePayload := &PayResponse{}
err = json.NewDecoder(resp.Body).Decode(responsePayload)
if err != nil {
return "", err
}
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"payeePubkey": destination,
"appId": app.ID,
"userId": app.User.ID,
"preimage": responsePayload.Preimage,
"paymentHash": responsePayload.PaymentHash,
}).Info("Keysend payment successful")
return responsePayload.Preimage, nil
}
errorPayload := &ErrorResponse{}
err = json.NewDecoder(resp.Body).Decode(errorPayload)
svc.Logger.WithFields(logrus.Fields{
"senderPubkey": senderPubkey,
"payeePubkey": destination,
"appId": app.ID,
"userId": app.User.ID,
"APIHttpStatus": resp.StatusCode,
}).Errorf("Payment failed %s", string(errorPayload.Message))
return "", errors.New(errorPayload.Message)
}
func (svc *AlbyOAuthService) AuthHandler(c echo.Context) error {
appName := c.QueryParam("c") // c - for client
// clear current session
sess, _ := session.Get(CookieName, c)
if sess.Values["user_id"] != nil {
delete(sess.Values, "user_id")
sess.Options.MaxAge = 0
sess.Options.SameSite = http.SameSiteLaxMode
if svc.cfg.CookieDomain != "" {
sess.Options.Domain = svc.cfg.CookieDomain
}
sess.Save(c.Request(), c.Response())
}
url := svc.oauthConf.AuthCodeURL(appName) // pass on the appName as state
return c.Redirect(302, url)
}
func (svc *AlbyOAuthService) CallbackHandler(c echo.Context) error {
code := c.QueryParam("code")
tok, err := svc.oauthConf.Exchange(c.Request().Context(), code)
if err != nil {
svc.Logger.WithError(err).Error("Failed to exchange token")
return err
}
client := svc.oauthConf.Client(c.Request().Context(), tok)
req, err := http.NewRequest("GET", fmt.Sprintf("%s/user/me", svc.cfg.AlbyAPIURL), nil)
if err != nil {
svc.Logger.WithError(err).Error("Error creating request /me")
return err
}
req.Header.Set("User-Agent", "NWC")
res, err := client.Do(req)
if err != nil {
svc.Logger.WithError(err).Error("Failed to fetch /me")
return err
}
me := AlbyMe{}
err = json.NewDecoder(res.Body).Decode(&me)
if err != nil {
svc.Logger.WithError(err).Error("Failed to decode API response")
return err
}
user := User{}
svc.db.FirstOrInit(&user, User{AlbyIdentifier: me.Identifier})
user.AccessToken = tok.AccessToken
user.RefreshToken = tok.RefreshToken
user.Expiry = tok.Expiry // TODO; probably needs some calculation
user.Email = me.Email
user.LightningAddress = me.LightningAddress
svc.db.Save(&user)
sess, _ := session.Get(CookieName, c)
sess.Options.MaxAge = 0
sess.Options.SameSite = http.SameSiteLaxMode
if svc.cfg.CookieDomain != "" {
sess.Options.Domain = svc.cfg.CookieDomain
}
sess.Values["user_id"] = user.ID
sess.Save(c.Request(), c.Response())
return c.Redirect(302, "/")
}
func albyInvoiceToTransaction(invoice *AlbyInvoice) *Nip47Transaction {
description := invoice.Comment
if description == "" {
description = invoice.Memo
}
var preimage string
if invoice.SettledAt != nil {
preimage = invoice.Preimage
}
var expiresAt *int64
if invoice.ExpiresAt != nil {
expiresAtUnix := invoice.ExpiresAt.Unix()
expiresAt = &expiresAtUnix
}
var settledAt *int64
if invoice.SettledAt != nil {
settledAtUnix := invoice.SettledAt.Unix()
settledAt = &settledAtUnix
}
return &Nip47Transaction{
Type: invoice.Type,
Invoice: invoice.PaymentRequest,
Description: description,
DescriptionHash: invoice.DescriptionHash,
Preimage: preimage,
PaymentHash: invoice.PaymentHash,
Amount: invoice.Amount * 1000,
FeesPaid: 0, // TODO: support fees
CreatedAt: invoice.CreatedAt.Unix(),
ExpiresAt: expiresAt,
SettledAt: settledAt,
Metadata: invoice.Metadata,
}
}