fix: token override when scanning (#2910)

contracts/contracts.go

@@ -1,6 +1,9 @@
 package contracts
 
 import (
+	"context"
+	"errors"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/status-im/status-go/contracts/directory"
@@ -159,6 +162,15 @@ func (c *ContractMaker) NewEthScan(chainID uint64) (*ethscan.BalanceScanner, err
 		return nil, err
 	}
 
+	bytecode, err := backend.CodeAt(context.Background(), contractAddr, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(bytecode) == 0 {
+		return nil, errors.New("is not a contract")
+	}
+
 	return ethscan.NewBalanceScanner(
 		contractAddr,
 		backend,

services/wallet/token.go

@@ -47,13 +47,13 @@ func NewTokenManager(
 	networkManager *network.Manager,
 ) *TokenManager {
 	tokenManager := &TokenManager{db, RPCClient, networkManager}
-
 	// Check the networks' custom tokens to see if we must update the tokenStore
 	networks := networkManager.GetConfiguredNetworks()
 	for _, network := range networks {
 		if len(network.TokenOverrides) == 0 {
 			continue
 		}
+
 		for _, overrideToken := range network.TokenOverrides {
 			tokensMap, ok := tokenStore[network.ChainID]
 			if !ok {