Function getEventExpiration

src/utils/event.ts:239–250

(event: Event)

}

export const getEventExpiration = (event: Event): number | undefined => {
  const [, rawExpirationTime] = event.tags.find((tag) => tag.length >= 2 && tag[0] === EventTags.Expiration) ?? []
  if (!rawExpirationTime) {
    return
  }

  const expirationTime = Number(rawExpirationTime)

  if (Number.isSafeInteger(expirationTime) && Math.log10(expirationTime) < 10) {
    return expirationTime
  }
}

export const getEventProofOfWork = (eventId: EventId): number => {
  return getLeadingZeroBits(Buffer.from(eventId, 'hex'))