status-im/status-go

package ens

import (
    "math"
    "strings"
)

type VerificationRecord struct {
    PublicKey           string
    Name                string
    Clock               uint64
    Verified            bool
    VerifiedAt          uint64
    VerificationRetries uint64
    NextRetry           uint64
}

// We calculate if it's too early to retry, by exponentially backing off
func (e *VerificationRecord) CalculateNextRetry() {
    e.NextRetry = e.VerifiedAt + ENSBackoffTimeSec*uint64(math.Exp2(float64(e.VerificationRetries)))
}

func (e *VerificationRecord) Valid() bool {
    return e.Name != "" && strings.HasSuffix(e.Name, ".eth") && e.Clock > 0
}