fix: use errors to avoid fmt (#367)

Signed-off-by: Chris Gianelloni <[email protected]>

Author: wolf31o2

internal/node/chainsync.go

@@ -15,7 +15,7 @@
 package node
 
 import (
-	"fmt"
+	"errors"
 	"time"
 
 	"github.com/blinklabs-io/cardano-node-api/internal/config"
@@ -123,7 +123,7 @@ func chainSyncRollForwardHandler(
 				}
 		*/
 		default:
-			return fmt.Errorf("unknown block data")
+			return errors.New("unknown block data")
 		}
 	}
 	return nil

internal/node/node.go

@@ -1,4 +1,4 @@
-// Copyright 2023 Blink Labs Software
+// Copyright 2025 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,6 +15,7 @@
 package node
 
 import (
+	"errors"
 	"fmt"
 	"os"
 
@@ -69,7 +70,7 @@ func GetConnection(connCfg *ConnectionConfig) (*ouroboros.Connection, error) {
 			return nil, fmt.Errorf("failure connecting to node via UNIX socket: %s", err)
 		}
 	} else {
-		return nil, fmt.Errorf("you must specify either the UNIX socket path or the address/port for your cardano-node")
+		return nil, errors.New("you must specify either the UNIX socket path or the address/port for your cardano-node")
 	}
 	return oConn, nil
 }

internal/utxorpc/submit.go

@@ -1,4 +1,4 @@
-// Copyright 2024 Blink Labs Software
+// Copyright 2025 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@ package utxorpc
 import (
 	"context"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"log"
 	"log/slog"
@@ -179,7 +180,7 @@ func (s *submitServiceServer) WaitForTx(
 		case evt, ok := <-eventChan:
 			if !ok {
 				logger.Error("Event channel closed unexpectedly.")
-				return fmt.Errorf("event channel closed")
+				return errors.New("event channel closed")
 			}
 
 			// Process the event

internal/utxorpc/sync.go

@@ -1,4 +1,4 @@
-// Copyright 2024 Blink Labs Software
+// Copyright 2025 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@ package utxorpc
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log"
 
@@ -215,7 +216,7 @@ func (s *chainSyncServiceServer) FollowTip(
 		evt, ok := <-eventChan
 		if !ok {
 			log.Printf("ERROR: channel closed")
-			return fmt.Errorf("ERROR: channel closed")
+			return errors.New("ERROR: channel closed")
 		}
 
 		switch evt.Type {
@@ -225,7 +226,7 @@ func (s *chainSyncServiceServer) FollowTip(
 			context := evt.Context
 			if context == nil {
 				log.Printf("ERROR: empty block context")
-				return fmt.Errorf("ERROR: empty block context")
+				return errors.New("ERROR: empty block context")
 			}
 			bc := context.(input_chainsync.BlockContext)
 			// Get event payload to get the block data

internal/utxorpc/watch.go

@@ -1,4 +1,4 @@
-// Copyright 2024 Blink Labs Software
+// Copyright 2025 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@ package utxorpc
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log"
 
@@ -82,7 +83,7 @@ func (s *watchServiceServer) WatchTx(
 		evt, ok := <-eventChan
 		if !ok {
 			log.Printf("ERROR: channel closed")
-			return fmt.Errorf("ERROR: channel closed")
+			return errors.New("ERROR: channel closed")
 		}
 
 		switch evt.Type {
@@ -91,7 +92,7 @@ func (s *watchServiceServer) WatchTx(
 			context := evt.Context
 			if context == nil {
 				log.Printf("ERROR: empty block context")
-				return fmt.Errorf("ERROR: empty block context")
+				return errors.New("ERROR: empty block context")
 			}
 			bc := context.(input_chainsync.BlockContext)
 			// Get event payload to get the block data