cmd: use errrors.New instead of empty fmt.Errorf (#27329)

Signed-off-by: jsvisa <delweng@gmail.com>

cmd/devp2p/internal/ethtest/chain.go

@@ -19,6 +19,7 @@ package ethtest
 import (
 	"compress/gzip"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"math/big"
@@ -98,7 +99,7 @@ func (c *Chain) Head() *types.Block {
 
 func (c *Chain) GetHeaders(req *GetBlockHeaders) ([]*types.Header, error) {
 	if req.Amount < 1 {
-		return nil, fmt.Errorf("no block headers requested")
+		return nil, errors.New("no block headers requested")
 	}
 
 	headers := make([]*types.Header, req.Amount)

cmd/devp2p/internal/ethtest/helpers.go

@@ -17,6 +17,7 @@
 package ethtest
 
 import (
+	"errors"
 	"fmt"
 	"net"
 	"reflect"
@@ -185,7 +186,7 @@ loop:
 	}
 	// make sure eth protocol version is set for negotiation
 	if c.negotiatedProtoVersion == 0 {
-		return nil, fmt.Errorf("eth protocol version must be set in Conn")
+		return nil, errors.New("eth protocol version must be set in Conn")
 	}
 	if status == nil {
 		// default status message

cmd/devp2p/internal/ethtest/transaction.go

@@ -17,6 +17,7 @@
 package ethtest
 
 import (
+	"errors"
 	"fmt"
 	"math/big"
 	"strings"
@@ -39,7 +40,7 @@ func (s *Suite) sendSuccessfulTxs(t *utesting.T) error {
 	}
 	for i, tx := range tests {
 		if tx == nil {
-			return fmt.Errorf("could not find tx to send")
+			return errors.New("could not find tx to send")
 		}
 		t.Logf("Testing tx propagation %d: sending tx %v %v %v\n", i, tx.Hash().String(), tx.GasPrice(), tx.Gas())
 		// get previous tx if exists for reference in case of old tx propagation
@@ -348,7 +349,7 @@ func generateTxs(s *Suite, numTxs int) (map[common.Hash]common.Hash, []*types.Tr
 
 	nextTx := getNextTxFromChain(s)
 	if nextTx == nil {
-		return nil, nil, fmt.Errorf("failed to get the next transaction")
+		return nil, nil, errors.New("failed to get the next transaction")
 	}
 	gas := nextTx.Gas()
 
@@ -357,7 +358,7 @@ func generateTxs(s *Suite, numTxs int) (map[common.Hash]common.Hash, []*types.Tr
 	for i := 0; i < numTxs; i++ {
 		tx := generateTx(s.chain.chainConfig, nonce, gas)
 		if tx == nil {
-			return nil, nil, fmt.Errorf("failed to get the next transaction")
+			return nil, nil, errors.New("failed to get the next transaction")
 		}
 		txHashMap[tx.Hash()] = tx.Hash()
 		txs[i] = tx

cmd/devp2p/internal/ethtest/types.go

@@ -18,6 +18,7 @@ package ethtest
 
 import (
 	"crypto/ecdsa"
+	"errors"
 	"fmt"
 	"time"
 
@@ -286,5 +287,5 @@ func (c *Conn) ReadSnap(id uint64) (Message, error) {
 		}
 		return snpMsg.(Message), nil
 	}
-	return nil, fmt.Errorf("request timed out")
+	return nil, errors.New("request timed out")
 }

cmd/devp2p/internal/v4test/discv4tests.go

@@ -19,6 +19,7 @@ package v4test
 import (
 	"bytes"
 	"crypto/rand"
+	"errors"
 	"fmt"
 	"net"
 	"time"
@@ -119,7 +120,7 @@ func (te *testenv) checkPingPong(pingHash []byte) error {
 // and a PING. The two packets do not have to be in any particular order.
 func (te *testenv) checkPong(reply v4wire.Packet, pingHash []byte) error {
 	if reply == nil {
-		return fmt.Errorf("expected PONG reply, got nil")
+		return errors.New("expected PONG reply, got nil")
 	}
 	if reply.Kind() != v4wire.PongPacket {
 		return fmt.Errorf("expected PONG reply, got %v %v", reply.Name(), reply)