A short non-reversible digest of the key, the row's identity in a store.
k<index> plus the key's last four characters, for log lines.
ok: hand out freely. resting: a quota rest until until. failed: out until a probe passes or a recheck re-admits it.
Optional kindThe kind of the last failure, set while resting or failed.
Optional untilWhen a quota rest ends (epoch ms).
Consecutive auth or billing failures since the last success; sets the recheck delay.
Optional lastThe start time of the last request that succeeded with this key.
Optional lastThe start time of the last request that failed with this key.
Optional nextWhen the next probe of a failed key may run (epoch ms).
When this state was last changed (epoch ms); a store keeps the newest.
The record's shape version; a store ignores other versions.
One key's standing in a pool.
fingerprintandlabelidentify the key without holding it.