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handle_pay_keysend_request.go
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handle_pay_keysend_request.go
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package main
import (
"context"
"encoding/json"
"fmt"
"github.com/nbd-wtf/go-nostr"
"github.com/sirupsen/logrus"
)
func (svc *Service) HandlePayKeysendEvent(ctx context.Context, request *Nip47Request, event *nostr.Event, app App, ss []byte) (result *nostr.Event, err error) {
nostrEvent := NostrEvent{App: app, NostrId: event.ID, Content: event.Content, State: "received"}
err = svc.db.Create(&nostrEvent).Error
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"eventId": event.ID,
"eventKind": event.Kind,
"appId": app.ID,
}).Errorf("Failed to save nostr event: %v", err)
return nil, err
}
payParams := &Nip47KeysendParams{}
err = json.Unmarshal(request.Params, payParams)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"eventId": event.ID,
"eventKind": event.Kind,
"appId": app.ID,
}).Errorf("Failed to decode nostr event: %v", err)
return nil, err
}
// We use pay_invoice permissions for budget and max amount
hasPermission, code, message := svc.hasPermission(&app, event, NIP_47_PAY_INVOICE_METHOD, payParams.Amount)
if !hasPermission {
svc.Logger.WithFields(logrus.Fields{
"eventId": event.ID,
"eventKind": event.Kind,
"appId": app.ID,
"senderPubkey": payParams.Pubkey,
}).Errorf("App does not have permission: %s %s", code, message)
return svc.createResponse(event, Nip47Response{
ResultType: request.Method,
Error: &Nip47Error{
Code: code,
Message: message,
}}, ss)
}
payment := Payment{App: app, NostrEvent: nostrEvent, Amount: uint(payParams.Amount / 1000)}
insertPaymentResult := svc.db.Create(&payment)
if insertPaymentResult.Error != nil {
return nil, insertPaymentResult.Error
}
svc.Logger.WithFields(logrus.Fields{
"eventId": event.ID,
"eventKind": event.Kind,
"appId": app.ID,
"senderPubkey": payParams.Pubkey,
}).Info("Sending payment")
preimage, err := svc.lnClient.SendKeysend(ctx, event.PubKey, payParams.Amount/1000, payParams.Pubkey, payParams.Preimage, payParams.TLVRecords)
if err != nil {
svc.Logger.WithFields(logrus.Fields{
"eventId": event.ID,
"eventKind": event.Kind,
"appId": app.ID,
"senderPubkey": payParams.Pubkey,
}).Infof("Failed to send payment: %v", err)
nostrEvent.State = NOSTR_EVENT_STATE_HANDLER_ERROR
svc.db.Save(&nostrEvent)
return svc.createResponse(event, Nip47Response{
ResultType: request.Method,
Error: &Nip47Error{
Code: NIP_47_ERROR_INTERNAL,
Message: fmt.Sprintf("Something went wrong while paying invoice: %s", err.Error()),
},
}, ss)
}
payment.Preimage = &preimage
nostrEvent.State = NOSTR_EVENT_STATE_HANDLER_EXECUTED
svc.db.Save(&nostrEvent)
svc.db.Save(&payment)
return svc.createResponse(event, Nip47Response{
ResultType: request.Method,
Result: Nip47PayResponse{
Preimage: preimage,
},
}, ss)
}