The event interest list was an allowlist of two entries, which meant every
capability the chain grew was invisible until somebody remembered to add a line
— the exact failure the metadata-oracle approach exists to avoid. It is a
denylist now.
Nothing is excluded for being unused. Whether a capability is exercised is the
question an analyst is asking: a chain that ships vesting and governance nobody
touches is telling you something, and it can only tell you that if the silence
is recorded rather than filtered on the way in. The rule for exclusion is
narrower than volume and narrower than usefulness — an event carrying no account
can never answer "everything involving this account", which is what the index is
for. Three kinds both name no account and fire every block, so they are skipped:
ZkTree::LeafInserted, QPoW::DifficultyAdjusted, System::ExtrinsicSuccess. They
render as "not indexed" rather than as a zero, because a zero reads as disuse.
Balances::Minted looked like a fourth. It fired exactly as often as
MinerRewarded across a 120-block sample and for the same reason, but it names an
account, minting is not only for miners, and showing a reward twice on one page
is a presentation problem to solve on that page rather than a reason to lose the
record. Kept.
`/:chain/event` is the call index's other half — 19 of 107 kinds fired — and
`/:chain/event/:pallet/:variant` the feed behind a row. Measured on live
mainnet the widening took the index from ~1.2 to ~3.4 rows per block and bought
739 accounts' worth of wormhole transfers that were previously invisible.
Signatures also lose their associated-type ceremony: the runtime writes
`<<T as frame_system::Config>::Lookup as StaticLookup>::Source`, which is
correct and forty characters of scaffolding around one word, and three of those
in a row pushed the counts off the side of the table. Generics are untouched —
`BalanceOf<T>` is information.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jp6a8EDar9ueEhAxzep4V5
rob thijssen
1e8869e7a1
