Fix payments manager initialization

main.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/signal"
 	"strings"
+	"sync"
 	"syscall"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -253,7 +254,21 @@ func main() {
 				return err
 			}
 
-			paymentsManager := paymentsmanager.PaymentsManager{}
+			paymentsManager, err := paymentsmanager.NewPaymentsManager(node)
+			if err != nil {
+				return err
+			}
+
+			wg := new(sync.WaitGroup)
+			defer wg.Wait()
+
+			paymentsManager.Start(wg)
+			defer func() {
+				err := paymentsManager.Stop()
+				if err != nil {
+					panic(err)
+				}
+			}()
 
 			cert, err := tls.LoadX509KeyPair(tlsCertFilepath, tlsKeyFilepath)
 			if err != nil {

paymentsmanager/http_middleware.go

@@ -5,14 +5,14 @@ import (
 	"encoding/json"
 	"errors"
 	"io"
+	"log/slog"
 	"math/big"
 	"net/http"
 	"regexp"
 	"strings"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/statechannels/go-nitro/crypto"
-	"golang.org/x/exp/slog"
 )
 
 const (

paymentsmanager/payments_manager.go

@@ -1,6 +1,7 @@
 package paymentsmanager
 
 import (
+	"log/slog"
 	"math/big"
 	"sync"
 	"time"
@@ -10,7 +11,6 @@ import (
 	"github.com/statechannels/go-nitro/node"
 	"github.com/statechannels/go-nitro/payments"
 	"github.com/statechannels/go-nitro/types"
-	"golang.org/x/exp/slog"
 )
 
 const (
@@ -167,7 +167,7 @@ func (pm *PaymentsManager) run() {
 
 			vouchersMap.Add(voucherHash.Hex(), InFlightVoucher{voucher: voucher, amount: paymentAmount})
 		case <-pm.quitChan:
-			slog.Info("stopping voucher subscription loop")
+			slog.Info("stopping voucher subscription loop...")
 			return
 		}
 	}