import {
  RepoEvent,
  isAccount,
  isCommit,
  isIdentity,
  isSync,
} from './firehose/lexicons'

export const didAndSeqForEvt = (
  evt: RepoEvent,
): { did: string; seq: number } | undefined => {
  if (isCommit(evt)) return { seq: evt.seq, did: evt.repo }
  else if (isAccount(evt) || isIdentity(evt) || isSync(evt))
    return { seq: evt.seq, did: evt.did }
  return undefined
}