Files
explore/lib/requestHost.ts
T
zeekay 608243e03a refactor(pchain): Subnet -> Net; add the mainnet explorer ingress
Drops "subnet" from the P-chain surface, which is not our vocabulary:

    useSubnets          -> useNets      (useSubnets.ts deleted)
    PChainSubnet        -> PChainNet
    GetSubnetsResponse  -> GetNetsResponse

One "subnet" deliberately survives — `subnetID` in lib/api/pchain/wire.spec.ts.
That is the UPSTREAM P-chain wire field, read through a raw
Record<string,string> cast, so renaming it would break response parsing. The
rule is about our own language, not about lying to the wire.

Also adds deploy/k8s/explore-fe/ingress-mainnet.yaml. explore.lux.network is
served by the Next.js deployment explore-fe-lux (ghcr.io/luxfi/explore), not
the Go `explorer` binary, which only backs api-explore.lux.network. This
replaces drift where the plain Ingress pointed explore.lux.network at
explorer:80 — the Go binary's embedded, stale build.

Two pre-commit gates had to be satisfied, both legitimate:
- eslint max-len: three className lines (BridgePage 230 chars, ChainRow 188 x2)
  exceeded the 160 limit; wrapped.
- cspell: `platformvm` flagged unknown. It is the P-chain VM's actual name, so
  it is added to cspell.jsonc `words` rather than renamed in code. (Note for
  the next person: .cspell-words.txt is listed under ignorePaths — it is a file
  excluded from checking, NOT the dictionary. Adding a word there does nothing.)

Verified: tsc --noEmit reports ZERO errors in every file this commit touches and
zero stale-symbol errors, so the rename resolves completely. The project's 223
pre-existing errors are all in untouched files and unchanged by this commit.
2026-07-26 09:11:38 -07:00

58 lines
2.0 KiB
TypeScript

// Request-scoped hostname store for stateless SSR.
//
// Next.js pages router bakes `NEXT_PUBLIC_APP_HOST` at BUILD time — the
// same image served from 6 different hostnames would SSR with the same
// brand every time. That kills horizontal scaling because every deploy
// must be rebuilt per hostname.
//
// This store captures `req.headers.host` at the start of each SSR render
// (see `_document.tsx`), so `getHostname()` on the server returns the
// actual requested host. The same docker image serves all chains on the
// Lux primary network (C, Zoo, Hanzo, SPC, Pars L1s) at distinct
// explore-*.lux.network hosts — one image, N hosts.
//
// Client side is unaffected: `window.location.hostname` continues to be
// the source of truth post-hydration.
import { AsyncLocalStorage } from 'async_hooks';
const store = new AsyncLocalStorage<string>();
/**
* Run an async function with a captured request hostname. All calls to
* `getRequestHost()` inside the callback (or transitively) will receive
* this hostname.
*/
export function withRequestHost<T>(host: string, fn: () => Promise<T> | T): Promise<T> | T {
return store.run(host, fn);
}
/**
* Returns the hostname of the currently-rendering SSR request, or an
* empty string when called outside a scoped run (e.g. during build,
* static pages, or edge functions where no request is bound).
*/
export function getRequestHost(): string {
return store.getStore() ?? '';
}
/**
* Parse a raw Host header ("explore.zoo.network:3000") into just the
* hostname part. Handles IPv4, IPv6 (bracketed), and missing port.
*/
export function parseHostHeader(hostHeader: string | undefined): string {
if (!hostHeader) return '';
const h = hostHeader.trim();
// IPv6 in brackets: [::1]:3000
if (h.startsWith('[')) {
const end = h.indexOf(']');
return end > 0 ? h.slice(1, end) : h;
}
// Strip :port
const colon = h.lastIndexOf(':');
if (colon > 0 && /^\d+$/.test(h.slice(colon + 1))) {
return h.slice(0, colon);
}
return h;
}