feat: set up project

internal/services/btc/notification.go

@@ -0,0 +1,79 @@
+package btc
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"gitea.urkob.com/urko/btc-pay-checker/internal/domain"
+)
+
+func (b *BitcoinService) Notify(ctx context.Context, notifChan chan<- domain.Notification) {
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt, syscall.SIGTERM)
+
+	q := &Zmq{}
+	if err := q.Connect(b.zmqAddress); err != nil {
+		log.Fatal("Failed to connect to ZeroMQ socket:", err)
+	}
+
+	blockChan := make(chan string)
+	go q.Listen(blockChan)
+
+	go func() {
+		for blockHash := range blockChan {
+			block, err := b.getBlock(blockHash)
+			if err != nil {
+				log.Println("Error b.GetBlock:", err)
+				continue
+			}
+
+			log.Println("block readed", block.Hash)
+			for _, txid := range block.Tx {
+				tx, err := b.getRawTransaction(txid, block.Hash)
+				if err != nil {
+					log.Println("Error b.getRawTransaction:", err)
+					continue
+				}
+
+				if !tx.InActiveChain {
+					log.Printf("tx is not active on chain | block %s | tx %s \n", blockHash, txid)
+					continue
+				}
+
+				receiverAddress := false
+				amount := 0.0
+				for _, output := range tx.Vout {
+					if output.ScriptPubKey.Address == b.walletAddress {
+						receiverAddress = true
+						amount = output.Value
+						break
+					}
+				}
+
+				if !receiverAddress {
+					continue
+				}
+
+				if receiverAddress {
+					log.Println("Transaction has been completed")
+					notifChan <- domain.Notification{
+						BlockHash: blockHash,
+						Tx:        txid,
+						Amount:    amount,
+						DoneAt:    time.Now(),
+					}
+					break
+				}
+			}
+		}
+	}()
+
+	<-interrupt
+	if err := q.Close(); err != nil {
+		log.Println("Error closing ZeroMQ socket:", err)
+	}
+}