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chore: require a fee receiver at build time, ignore internal docs

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The build now fails fast when KYBERSWAP_FEE_RECEIVER is unset instead of
shipping a bundle that sweeps output fees nowhere. Documents the key in
.env.example alongside what it actually costs: 0 bps on direct swaps, 9 bps
on ZAP's embedded swap leg.

Docs are written for the private tree and get copied in by mistake during a
sync, so *.md is ignored by default and publishing one is opt-in.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
labrinyang
2026-07-22 23:57:00 +08:00
co-authored by Claude Opus 4.8
parent 4e317eff6d
commit 3a392cb141
5 changed files with 42 additions and 20 deletions
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vite.config.ts
+7 -4
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@@ -6,16 +6,20 @@ import { fileURLToPath } from 'node:url'
// envPrefix exposes exactly those keys to the client bundle.
//
// SECRET RULE: `RPC` (private key-bearing URL) is for personal/local builds only —
// a build meant for public serving must NOT have it set (see README "Chain reads").
// a build meant for public serving must NOT have it set (see README "Deploy").
// A public build reads the chain through same-origin `/rpc` instead; the dev and
// preview servers below emulate that reverse proxy so the mode is testable locally.
export default defineConfig(({ mode }) => {
const envDir = fileURLToPath(new URL('.', import.meta.url))
const env = loadEnv(mode, envDir, ['RPC'])
const env = loadEnv(mode, envDir, ['RPC', 'KYBERSWAP_'])
const feeReceiver = (process.env.KYBERSWAP_FEE_RECEIVER ?? env.KYBERSWAP_FEE_RECEIVER ?? '').trim()
if (!/^0x[0-9a-fA-F]{40}$/.test(feeReceiver)) {
throw new Error('KYBERSWAP_FEE_RECEIVER must be a valid address; the swap/zap fee sweep requires a configured receiver (see .env.example)')
}
// local emulation of the production reverse proxies, so the server deployment
// mode is fully testable via `RPC="" npm run build && npm run preview`:
// - /rpc -> the .env RPC (or RPC_PROXY_TARGET override); key stays in node
// - /kyber -> the public kyber aggregator
// - /kyber -> read-only Kyber valuation endpoint
const upstream = (process.env.RPC_PROXY_TARGET ?? env.RPC ?? '').trim()
const passthru = (prefix: string, target: string) => ({
target,
@@ -23,7 +27,6 @@ export default defineConfig(({ mode }) => {
rewrite: (p: string) => p.replace(new RegExp(`^${prefix}`), ''),
})
const proxy: Record<string, object> = {
'/kyber-setting': passthru('/kyber-setting', 'https://ks-setting.kyberswap.com'),
'/kyber': passthru('/kyber', 'https://aggregator-api.kyberswap.com'),
'/dexscreener': passthru('/dexscreener', 'https://api.dexscreener.com'),
'/goldsky': passthru('/goldsky', 'https://api.goldsky.com'),