package logic

import (
	"bytes"
	"errors"
	"github.com/matchsystems/werr"
	"math"
	"mic-wallet/common"
	"mic-wallet/server/repository/entities"
	"time"
)

func ValidateNewTransaction(tx *entities.NewTransactionOpts, txHash []byte) error {
	if bytes.Compare(tx.ReceiverPublicKey, tx.SenderPublicKey) == 0 {
		return errors.New("cannot send to yourself")
	}
	valid, err := common.VerifyTransactionSignature(tx.SenderPublicKey, tx.Signature, txHash, tx.CreatedAt)
	if err != nil {
		return werr.Wrapf(err, "failed to verify signature")
	}
	if !valid {
		return errors.New("invalid signature")
	}

	now := time.Now().UTC()
	// Sent data has to be in UTC timezone
	if time.Duration(math.Abs(float64(tx.CreatedAt.Sub(now)))) > time.Minute*1 {
		return errors.New("invalid transaction created_at time")
	}
	return nil
}