service.go

package centrauthsrv

//import (
//	"errors"
//
//	"github.com/ethereum/go-ethereum/common"
//	"github.com/ethereum/go-ethereum/crypto"
//	common3 "github.com/iden3/go-iden3/common"
//	"github.com/iden3/go-iden3/services/claimsrv"
//	"github.com/iden3/go-iden3/utils"
//)
//
//// Auth validates that the given AuthMsg data matches the requirments
//func Auth(authMsg AuthMsg) error {
//	err := VerifyChallengeTimestamp(authMsg.Challenge)
//	if err != nil {
//		return err
//	}
//
//	sigBytes, err := common3.HexDecode(authMsg.Signature)
//	if err != nil {
//		return err
//	}
//
//	// check the authMsg.KSignProof
//	proofOfKSign, err := authMsg.KSignProof.Unhex()
//	if err != nil {
//		return err
//	}
//
//	// TODO get the Relay address, now it's hardcoded, will be getted from the counterfactual contract of the Relay
//	addrBytes, err := common3.HexDecode("0xe0fbce58cfaa72812103f003adce3f284fe5fc7c")
//	if err != nil {
//		return err
//	}
//	relayAddr := common.BytesToAddress(addrBytes)
//	if !claimsrv.CheckProofClaimUser(relayAddr, proofOfKSign, 140) { //TODO send the address of the Relay, to check the signature of proofOfKSign
//		return errors.New("ProofKSign can not be verified")
//	}
//
//	// verify the Signature of the Challenge with the KSign
//	if !utils.VerifySigEthMsg(crypto.PubkeyToAddress(authMsg.KSignPk.PublicKey),
//		sigBytes, []byte(authMsg.Challenge)) {
//		return errors.New("signature of challenge can not be verified")
//	}
//
//	return nil
//}