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zeekay
b76299d500
Two related changes that get the explorer SPA rendering real chain
data without waiting for upstream luxfi/explore to ship a Next.js
static export.
1. Runtime SPA overlay (config.go, frontend.go)
New cfg.StaticDir (also EXPLORER_STATIC_DIR env var). When set,
the frontend prefers the on-disk copy of any static asset over the
embedded FS — so a ConfigMap-mounted SPA shell replaces the
embedded 60-byte placeholder without rebuilding the binary. The
embedded FS remains the source of truth at build time and the
fallback when no overlay is configured.
handleSPA + serveBrandFile both check overlay > embedded. Tests
cover overlay-present, overlay-missing-file fallback, no-overlay,
and env-var-only configuration.
2. Substantive SPA shell (static/index.html)
Replaced the 60-byte stub (<div id="root"></div>) with a vanilla
JS SPA — ~7KB, zero dependencies, no React/Next.js. Reads
window.ENV from /envs.js, fetches /v1/indexer/{slug}/{stats,blocks,
transactions}, renders KPIs + Latest Blocks + Latest Transactions
with per-chain switching and brand color/title overrides. Polls
every 15s. Stores selected chain in URL hash + localStorage.
This is the explorer's default UI until upstream luxfi/explore
ships output: 'export' and the Dockerfile's optional pnpm-build
overlay activates.
Dockerfile: drop the leftover merge-conflict markers around the SPA
build stage, keep the explanatory comment.
Tests: 4 new in frontend_test.go covering overlay precedence + env-var
fallback. All existing tests (registry, realtime) still pass.
