publish payment receipt info to Nostr relay

nostr/nostrfy.go

@@ -0,0 +1,96 @@
+package nostrfy
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"github.com/boltcard/boltcard/db"
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip04"
+	log "github.com/sirupsen/logrus"
+)
+
+func SendNostrfication(card_id int, card_name string, payOrRec int) {
+	requestURL := fmt.Sprintf("https://%s/.well-known/nostr.json?name=%s", db.Get_setting("HOST_DOMAIN"), card_name)
+	req, err := http.NewRequest(http.MethodGet, requestURL, nil)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	resBody, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		log.Warn(err.Error())
+	}
+	nipNames := make(map[string]interface{})
+	if strings.Contains(string(resBody), "names") {
+		var res map[string]any
+		if err := json.Unmarshal([]byte(resBody), &res); err != nil {
+			log.Warn(err.Error())
+			return
+		}
+		nnames := res["names"].(map[string]any)
+		for key, value := range nnames {
+			nipNames[key] = value.(string)
+		}
+	} else {
+		log.Warn("No NIP-05 addresses...Unable to send payment/receipt info")
+		return
+	}
+
+	bolt_bot_privkey := db.Get_setting("NOSTR_BOT_PRIVKEY_HEX")
+	nostr_rel_list := db.Get_setting("NOSTR_RELAYS_LIST")
+	if bolt_bot_privkey != "" && nostr_rel_list != "" && len(nipNames) != 0 {
+		last_tnx, err := db.Get_latest_card_tx(card_id, payOrRec)
+		if err != nil {
+			log.Warn(err.Error())
+			return
+		}
+		nmsg := fmt.Sprintf("you made payment of %d sats via BoltCard", last_tnx.Tx_amount_msats/1000)
+		if payOrRec == db.NostrRec {
+			nmsg = fmt.Sprintf("you received %d sats via BoltCard service", last_tnx.Tx_amount_msats/1000)
+		}
+		tags := make(nostr.Tags, 0)
+		for nkey, npub := range nipNames {
+			msg := fmt.Sprintf("Hey %s, %s - %s", nkey, nmsg, last_tnx.Tx_time)
+			pub, _ := nostr.GetPublicKey(bolt_bot_privkey)
+			css, _ := nip04.ComputeSharedSecret(npub.(string), bolt_bot_privkey)
+			emsg, _ := nip04.Encrypt(msg, css)
+			tag1 := nostr.Tag{"p", npub.(string)}
+			tt := tags.AppendUnique(tag1)
+			ev := nostr.Event{
+				PubKey:    pub,
+				CreatedAt: nostr.Now(),
+				Kind:      4,
+				Tags:      tt,
+				Content:   emsg,
+			}
+			// calling Sign sets the event ID field and the event Sig field
+			ev.Sign(bolt_bot_privkey)
+			for _, url := range []string{nostr_rel_list} {
+				ctx := context.WithValue(context.Background(), "url", url)
+				relay, err := nostr.RelayConnect(ctx, url)
+				if err != nil {
+					log.Warn(err.Error())
+					continue
+				}
+				_, err = relay.Publish(ctx, ev)
+				if err != nil {
+					log.Warn(err.Error())
+					continue
+				}
+				log.WithFields(log.Fields{"published to ": url}).Info("payment/reciept message sent")
+			}
+		}
+	}
+}