# paivana — `paivana.hacktivism.ch`

GNU Taler **paivana-httpd** reverse-proxy paywall (DD 95 / DD 76 style), GOA payments.

| Item | Value |
|------|--------|
| Live | `/home/hernani/koopa-paivana/` |
| Containers | `koopa-paivana`, `koopa-paivana-upstream` |
| Image | `localhost/koopa-paivana:latest` (built from `Containerfile`); process **uid 1000** `paivana-httpd` |
| Upstream | `nginxinc/nginx-unprivileged` on **:8080** (not root nginx:80) |
| Host port | **9025** → Caddy `paivana.hacktivism.ch` |
| Currency | **GOA** |
| Merchant | `https://taler.hacktivism.ch/instances/goa-shop/` |
| Template | `paivana` (`template_type: paivana`, amount **`GOA:4200`**, `website_regex: .*`) |
| Access | **`-g`** site-wide: pay once → example upstream free to browse |
| Upstream | example site in `upstream/` (compose service) |

## Layout

| Path | Role |
|------|------|
| `Containerfile` | Multi-stage: build paivana-httpd from `git.taler.net/paivana` + Taler libs |
| `compose.yml` | `koopa-paivana` + nginx upstream |
| `conf/paivana.conf.template` | Config; secrets substituted at start |
| `entrypoint.sh` | Inject secrets → run `paivana-httpd -g -f` |
| `secrets/` | **not in git** — live only |
| `upstream/` | Protected demo content |
| `container-koopa-paivana.service` | systemd --user oneshot compose up |
| `taler-systems.gpg` | Deb signing key (build context) |

## Secrets (live)

| File | Role |
|------|------|
| `~/koopa-paivana/secrets/merchant-access-token` | `secret-token:…` for goa-shop |
| `~/koopa-paivana/secrets/paivana-secret` | cookie MAC secret (stable across restarts) |

Mirror notes: `koopa-admin-secrets` → `koopa/home-hernani/koopa-paivana/secrets/` (paths only / examples).

## Was kaputt war (klar · 2026-07)

Drei **unabhängige** Defekte; Symptom oft gleich (Paywall 502 / tot / kein Template).
Stand: behoben auf koopa; nicht wiederholen.

### 1) Boot-Race: extra systemd-Unit nur für Upstream

| | |
|--|--|
| **Symptom** | Nach Reboot: `container-koopa-paivana-upstream.service` **failed** / start-limit-hit; Upstream fehlt oder Compose und Unit kämpfen. |
| **Ursache** | Separate User-Unit tat nur `podman start koopa-paivana-upstream` **ohne** dass Compose die Container schon angelegt hatte → **exit 125**. Compose-Unit startet **beide** Services (`paivana` + `upstream`) ohnehin. |
| **Fix** | **Nur** `container-koopa-paivana.service` (compose up). Separate Upstream-Unit: `disable --now`. Nicht neu anlegen. |
| **Nicht verwechseln mit** | Problem 2 (Merchant noch down → 502 trotz laufender Container). |

### 2) Start-Reihenfolge: Paivana vor Merchant-Apps → **502**

| | |
|--|--|
| **Symptom** | `paivana.hacktivism.ch` / `:9025` **502** nach Boot; Container laufen, Paywall/Template-Flow tot. |
| **Ursache** | Merchant-Container ist hoch, aber **In-App** (`taler-merchant-httpd` etc.) startet erst über `taler-merchant-apps.service` / `ensure-taler-apps`. Paivana braucht die **private Merchant-API** (Template `paivana` / goa-shop). Zu früh → 502. |
| **Fix** | Drop-in `configs/systemd/user/container-koopa-paivana.service.d/order.conf`: `After=` / `Wants=` `taler-merchant-apps.service` (+ ggf. merchant-Container). Siehe `2026/2026-07-16--reboot-recovery.md`. |
| **Check** | Merchant `https://taler.hacktivism.ch/config` **200**, dann Paivana smoke (unten). |

### 3) Pasta / DNS: Container erreicht Merchant nicht (Timeout / AAAA)

| | |
|--|--|
| **Symptom** | Paivana läuft, aber Template-Laden / Merchant-Calls **hängen oder scheitern**; Logs: Timeouts Richtung `taler.hacktivism.ch`. |
| **Ursache** | Rootless **pasta** hairpint öffentliche DNS nicht sauber. `extra_hosts: …:host-gateway` allein reichte nicht: oft gewinnt noch die **öffentliche AAAA**, Connection timeout. Merchant sitzt am Host (**~:9010**), erreichbar über Pasta-IPv4 **`172.17.0.1`**. |
| **Fix** | In `compose.yml` feste IPv4-Hosts (nicht nur host-gateway): |

```yaml
extra_hosts:
  - "taler.hacktivism.ch:172.17.0.1"
  - "bank.hacktivism.ch:172.17.0.1"
  - "exchange.hacktivism.ch:172.17.0.1"
```

| | |
|--|--|
| **Commit** | `f26bf6a` (pin Taler hosts to pasta IPv4) |

### Kurz: was *nicht* das Problem war

- Caddy-Vhost an sich (leitet auf **9025**).
- Fehlen des Templates im Merchant (Template `paivana` / GOA:4200 war angelegt; ohne Merchant-Apps oder ohne Routing wirkt es so, als fehlte es).
- „Nur nginx-Upstream“ — Upstream ist unprivileged nginx **:8080**; ohne Problem 1/2/3 ist das stabil.

### Erwartet gesund

| Check | Expect |
|-------|--------|
| `curl -si http://127.0.0.1:9025/` | **302** → `/.well-known/paivana/templates/paivana#…` |
| `https://paivana.hacktivism.ch/` | **402** paywall HTML + `paivana: taler://pay-template/…` |
| monitoring `urls` | `www.paivana` OK |
| e2e (GOA, lokal) | `e2e.paivana` Template-Pay **GOA:4200** (wenn `E2E_PAIVANA=1`) |

---

## Ops

```bash
# as hernani on koopa
cd ~/koopa-paivana
podman compose build
podman compose up -d
podman logs -f koopa-paivana
curl -si http://127.0.0.1:9025/ | head   # 302 → /.well-known/paivana/templates/paivana#…
```

Autostart (**only** the compose unit — starts **both** `koopa-paivana` and
`koopa-paivana-upstream`):

```bash
mkdir -p ~/.config/systemd/user
cp ~/koopa-paivana/container-koopa-paivana.service ~/.config/systemd/user/
# required on koopa: After= merchant apps
#   configs/systemd/user/container-koopa-paivana.service.d/order.conf
systemctl --user daemon-reload
systemctl --user enable --now container-koopa-paivana.service
```

**Do not** enable a separate `container-koopa-paivana-upstream.service` that only
runs `podman start koopa-paivana-upstream` — see failure **#1** above.  
If such a unit exists:  
`systemctl --user disable --now container-koopa-paivana-upstream.service`.

## Network notes

See failure **#3**. Live compose pins Taler hostnames to pasta IPv4
`172.17.0.1` so `paivana-httpd` reaches the host merchant private API without
public AAAA timeouts.

## Caddy

Vhost → `127.0.0.1:9025` (see `configs/caddy/Caddyfile`).  
Flags `-g` (site-wide payment) and `-f` (X-Forwarded-For).

## Merchant template

```bash
curl -X POST 'https://taler.hacktivism.ch/instances/goa-shop/private/templates' \
  -H "Authorization: Bearer secret-token:…" \
  -H 'Content-Type: application/json' \
  -d '{
    "template_id": "paivana",
    "template_description": "Paivana paywall (GOA)",
    "template_contract": {
      "template_type": "paivana",
      "summary": "Access to paivana.hacktivism.ch",
      "website_regex": ".*",
      "choices": [{ "amount": "GOA:4200", "description": "Unlock example site (then free to browse)" }]
    }
  }'
```

## Docs

- https://docs.taler.net/taler-paivana-manual.html
- https://docs.taler.net/design-documents/095-captcha-100.html
- https://docs.taler.net/design-documents/076-paywall-proxy.html
- https://docs.taler.net/manpages/paivana.conf.5.html
