Eiko: historical results first — 3 October 2026

The prior version opened the existing deposit form above the history. That
missed the approved result-first discovery intent. The plan now leads with
the last completed epoch's percentage versus the passive limit order and its
dates. It does not claim a forecast or a wallet's personal return. The amount
replay and budget-to-options calculators remain deferred.

Loading
- Current-vault history has a small same-origin archive for a first visit,
  plus a localStorage copy of successfully decoded live raw records.
- The archive covers all 24 configured current series. A missing completed
  epoch stays missing; no neighboring strike or invented zero replaces it.
- Earlier-vault lists are cached after the first complete source read. They
  still need that first read; the static archive covers current vaults only.
- Restored results remain visible with Updating while a background read runs.
  Failed updates retain saved results and show update unavailable.
- Current fees, balances, deposits and option quotes are not served from this
  cache. No transaction or valuation formula changed.

Correctness
- Current history is raw ABI data, decoded again with the existing canonical
  eight-word record checks and the same passive-limit calculation.
- Keys include deployment generation, chain, vault, series, token pair and
  decimal convention. Pending strike links must match their exact raw strike.
- Persisted data cannot restore skip permission. Only a successful live read
  in the current browser session permits a skip, for at most 60 seconds.
- Same-count histories are re-read after that interval: reorg replacements
  cannot become permanently cached. Normal app refresh is every 90 seconds.
- Current count and range are read in one multicall. All earlier sources use
  one shared block. Partial/unverified earlier sources cannot refresh a cache.
- Concurrent same-context consumers share a bounded 30-second read. Timeout
  or rejection releases the lock. Late responses cannot repaint another asset.
- Blocked/quota-full localStorage falls back to memory and live reads.

Archive witness
scripts/export-eiko-history.mjs made read-only calls through publicnode and
the official Base RPC. Both returned byte-identical batches at block
52087161, hash
0x9c652ec74491598305dd5128128af6b3ae5c9cef13fce3aea095ca1f1a35d75f.
The block hash was checked again after export. The raw records, address
metadata, decimal checks and anchor are in eiko/history-seed.json.

Review and tests
Fresh Astra review found a delayed-seed/error status race and an equal-time
epoch ordering issue. Both were corrected and have regression tests.
test-history-cache.mjs: ten cases, real ethers decoding with stubbed fetch;
restoration, absent metadata, duplicate reads, same-count replacement, failed
update, wrong context, malformed data, timeout recovery, delayed seed and
all-source inherited-history completeness.
test-plan.mjs checks the headline, negative outcomes, date comparison,
equal-time ordering and no automatic deposit opening.
All 33 root Eiko JavaScript suites were run: 25 passed, the same eight baseline
nonzero exits remained (aave-fork, alpha, chain-focus, core-housekeeping,
m-cutover, markets-r2-live opt-in, no-swap-withdraw, vault-generation).
check-wiring against 6e119846 and diff whitespace checks passed.

Live checks
Production /dev/eiko URL only. Desktop 1440x1000 and phone 390x844.
Fresh and repeat visits, expanding history, opening the real deposit panel,
and console inspection. No transaction was signed.
One repeat-visit trace displayed +15.78% with Updating at 820.5ms after
navigation (DOMContentLoaded 714.5ms), before the first XHR at 873.8ms.
This is an observed trace, not a promised latency. The first archive fetch
in the initial visit completed in about 44ms after it started.
Final checked console: existing WalletConnect dappUrl warning only; an
earlier read exercised RPC fallback and then completed.

Independent Eiko implementation only. No Gyro, Merry, Meryl, indexer or beta
changes. Committed to local dev; no push.