refactor: use errors.New to replace fmt.Errorf with no parameters

cmd/juno/dbcmd.go

@@ -2,6 +2,7 @@
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 
@@ -265,7 +266,7 @@
 func openDB(path string) (db.DB, error) {
 	_, err := os.Stat(path)
 	if os.IsNotExist(err) {
-		return nil, fmt.Errorf("database path does not exist")
+		return nil, errors.New("database path does not exist")
 	}
 
 	database, err := pebble.New(path)

core/trie/key.go

@@ -3,6 +3,7 @@ package trie
 import (
 	"bytes"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"math/big"
 
@@ -111,7 +112,7 @@ func (k *Key) shiftRight(n uint8) {
 // MostSignificantBits returns a new key with the most significant n bits of the current key.
 func (k *Key) MostSignificantBits(n uint8) (*Key, error) {
 	if n > k.len {
-		return nil, fmt.Errorf("cannot get more bits than the key length")
+		return nil, errors.New("cannot get more bits than the key length")
 	}
 
 	keyCopy := k.Copy()

core/trie/trie.go

@@ -191,7 +191,7 @@
 // Put adds a new StorageNode or updates an existing one.
 func (s *StorageNodeSet) Put(key Key, node *StorageNode) error {
 	if node == nil {
-		return fmt.Errorf("cannot put nil node")
+		return errors.New("cannot put nil node")
 	}
 
 	// If key exists, update the node

p2p/starknet/iterator.go

@@ -2,8 +2,6 @@ package starknet
 
 import (
 	"errors"
-	"fmt"
-
 	"github.com/NethermindEth/juno/blockchain"
 	"github.com/NethermindEth/juno/core"
 	"github.com/NethermindEth/juno/core/felt"
@@ -23,10 +21,10 @@ type iterator struct {
 
 func newIteratorByNumber(bcReader blockchain.Reader, blockNumber, limit, step uint64, forward bool) (*iterator, error) {
 	if step == 0 {
-		return nil, fmt.Errorf("step is zero")
+		return nil, errors.New("step is zero")
 	}
 	if limit == 0 {
-		return nil, fmt.Errorf("limit is zero")
+		return nil, errors.New("limit is zero")
 	}
 
 	return &iterator{
@@ -41,7 +39,7 @@ func newIteratorByNumber(bcReader blockchain.Reader, blockNumber, limit, step ui
 
 func newIteratorByHash(bcReader blockchain.Reader, blockHash *felt.Felt, limit, step uint64, forward bool) (*iterator, error) {
 	if blockHash == nil {
-		return nil, fmt.Errorf("block hash is nil")
+		return nil, errors.New("block hash is nil")
 	}
 
 	block, err := bcReader.BlockByHash(blockHash)

rpc/l1.go

@@ -2,6 +2,7 @@
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/big"
 
@@ -81,7 +82,7 @@
 
 func (h *Handler) messageToL2Logs(ctx context.Context, txHash *common.Hash) ([]*common.Hash, *jsonrpc.Error) {
 	if h.l1Client == nil {
-		return nil, jsonrpc.Err(jsonrpc.InternalError, fmt.Errorf("11 client not found, cannot serve starknet_getMessage"))
+		return nil, jsonrpc.Err(jsonrpc.InternalError, errors.New("11 client not found, cannot serve starknet_getMessage"))
 	}
 
 	receipt, err := h.l1Client.TransactionReceipt(ctx, *txHash)

rpc/transaction.go

@@ -609,7 +609,7 @@ func (h *Handler) AddTransaction(ctx context.Context, tx BroadcastedTransaction)
 	}, nil
 }
 
-var errTransactionNotFound = fmt.Errorf("transaction not found")
+var errTransactionNotFound = errors.New("transaction not found")
 
 func (h *Handler) TransactionStatus(ctx context.Context, hash felt.Felt) (*TransactionStatus, *jsonrpc.Error) {
 	receipt, txErr := h.TransactionReceiptByHash(hash)