func NewSolo(logger *logrus.Logger) *Solo {
	return &Solo{
		logger: logger.WithField("module", "solo"),
	}
}
NewSolo returns a Solo object with nil State and Service
package solo
import (
	"fmt"
	"strconv"
	"time"
	geth_common "github.com/ethereum/go-ethereum/common"
	"github.com/mosaicnetworks/evm-lite/src/service"
	"github.com/mosaicnetworks/evm-lite/src/state"
	"github.com/sirupsen/logrus"
)
type Solo struct {
	txIndex int
	state   *state.State
	service *service.Service
	logger  *logrus.Entry
}