core/txpool : small cleanup refactors (ethereum#28654)

Author: ucwong

cmd/geth/logging_test.go

@@ -21,14 +21,14 @@ package main
 import (
 	"bufio"
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"math/rand"
 	"os"
 	"os/exec"
 	"strings"
 	"testing"
-	"encoding/json"
 
 	"github.com/ethereum/go-ethereum/internal/reexec"
 )

core/txpool/legacypool/legacypool.go

@@ -923,8 +923,7 @@ func (pool *LegacyPool) addLocals(txs []*types.Transaction) []error {
 // addLocal enqueues a single local transaction into the pool if it is valid. This is
 // a convenience wrapper around addLocals.
 func (pool *LegacyPool) addLocal(tx *types.Transaction) error {
-	errs := pool.addLocals([]*types.Transaction{tx})
-	return errs[0]
+	return pool.addLocals([]*types.Transaction{tx})[0]
 }
 
 // addRemotes enqueues a batch of transactions into the pool if they are valid. If the
@@ -939,8 +938,7 @@ func (pool *LegacyPool) addRemotes(txs []*types.Transaction) []error {
 // addRemote enqueues a single transaction into the pool if it is valid. This is a convenience
 // wrapper around addRemotes.
 func (pool *LegacyPool) addRemote(tx *types.Transaction) error {
-	errs := pool.addRemotes([]*types.Transaction{tx})
-	return errs[0]
+	return pool.addRemotes([]*types.Transaction{tx})[0]
 }
 
 // addRemotesSync is like addRemotes, but waits for pool reorganization. Tests use this method.