64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
package protocol
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import (
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"math"
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"strings"
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)
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// maxRetries is the maximum number of attempts we do before giving up
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const maxRetries uint64 = 11
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// ENSBackoffTimeMs is the step of the exponential backoff
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// we retry roughly for 17 hours after receiving the message 2^11 * 30000
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const ENSBackoffTimeMs uint64 = 30000
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// We calculate if it's too early to retry, by exponentially backing off
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func verifiedENSRecentlyEnough(now, verifiedAt, retries uint64) bool {
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return now < verifiedAt+ENSBackoffTimeMs*retries*uint64(math.Exp2(float64(retries)))
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}
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func shouldENSBeVerified(c *Contact, now uint64) bool {
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if c.Name == "" {
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return false
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}
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if c.ENSVerified {
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return false
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}
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if c.ENSVerificationRetries >= maxRetries {
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return false
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}
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if verifiedENSRecentlyEnough(now, c.ENSVerifiedAt, c.ENSVerificationRetries) {
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return false
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}
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if !strings.HasSuffix(c.Name, ".eth") {
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return false
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}
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return true
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}
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// This should trigger re-verification of the ENS name for this contact
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func hasENSNameChanged(c *Contact, newName string, clockValue uint64) bool {
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if c.LastENSClockValue > clockValue {
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return false
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}
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if newName == "" {
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return false
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}
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if !strings.HasSuffix(newName, ".eth") {
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return false
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}
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if newName == c.Name {
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return false
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}
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return true
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}
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