# InstantAdPay — site

Membership advertising with immutable on-chain settlement. Zero-dependency
Node server (RM Circle pattern): static pages + JSON API + SSE ledger.

## Architecture

- `server.js` — http server: pages, `/api/*`, `/join/<id>` sponsor links, SSE feed
- `chain.js` — contract reader + persistent event indexer (free public RPCs)
- `auth.js` — SIWE wallet sign-in (EIP-4361), sessions in the volume
- `accounts.js` — site-side records only (free members, first-touch sponsor
  attribution, handles). The CHAIN is the source of truth for money/credits.
- `public/` — landing, live ledger, member area; no client libraries

## Chain flip (rehearsal → mainnet)

Everything chain-specific lives in `data/config.json` (volume):
`{contract, chainId, chainName, explorer, rpcs, deployBlock}`.
Defaults point at the **Amoy rehearsal** deployment. Launch = deploy the
mainnet contract, wipe `accounts.json`/`sessions.json`/`chain-index.json`,
PATCH `/api/admin/chain` with the mainnet values, set `rehearsal:false` via
`/api/admin/site`. Same code, different config.

## Run

```
PORT=3100 node server.js       # DATA_DIR defaults to ./data
```

Admin API auth: `Authorization: Bearer $ADMIN_PASSWORD`.

Spec: `../CONTRACT-SPEC.md` (v1.0.3-frozen). Contracts: `../contracts/`.