# devplace-node

Native donor client for the DevPlace community node network. One static Go binary, standard library only.

## What you share

When running, and only inside the limits you configured:

- Your internet connection and your IP address, used to fetch public pages from the destinations on the allowlist (today: `reddit.com`, `redd.it` and their subdomains) over ports 80 and 443, GET only.
- The fetched public page, which DevPlace receives and may cache for a short time.
- Byte counters (up and down) so your daily cap and your lifetime totals are correct.

## What is never shared

- Your cookies, logins, accounts and browser. The client has no cookie jar and drops `Cookie`, `Authorization` and `Proxy-Authorization` from every request. It uses no browser profile and reads no files besides its own config.
- Any access to your local network: addresses that are private, loopback, link-local, CGNAT or multicast are refused after local DNS resolution, and the connection goes to the address that was checked.
- Any destination outside the baked-in allowlist. A list sent by the server can only be equal or narrower. Redirects that leave the allowlist are refused.
- Anything on ports other than 80 and 443.

The device secret (`dpn_...`) is stored in the config file with mode 0600 and is never logged or printed.

## Use

```
devplace-node login --server https://devplace.net --secret dpn_...
devplace-node status
devplace-node run
devplace-node version
```

Create the device secret on your DevPlace profile after consenting to bandwidth sharing. `login` asks the server to accept the secret before storing it (`--no-verify` skips that). The secret can also come from `DEVPLACE_NODE_SECRET`. Every command takes `--config PATH`.

`run` is quiet: it logs start, disconnects, and one totals line per day. Add `-v` for detail. Exit code 3 means the server ended this device for good (revoked, suspended, kill switch, no consent, not adult, replaced by another instance of the same device); fix the cause and start it again.

## Config file

Stored at `<user config dir>/devplace-node/config.json`, with `usage.json` (today's byte count) beside it.

```json
{
  "server": "https://devplace.net",
  "secret": "dpn_...",
  "bandwidth_mb_day": 500,
  "max_concurrent": 2,
  "max_tunnels": 2,
  "active_from": "",
  "active_to": "",
  "timezone": ""
}
```

`active_from` and `active_to` are `HH:MM` in `timezone` (empty means the system timezone); a window may wrap midnight. These limits are enforced locally and the server can only make them stricter.

## Build and package

`./build.sh [outdir]` cross-compiles linux/amd64, linux/arm64, darwin/arm64, darwin/amd64 and windows/amd64 with `CGO_ENABLED=0 -trimpath`, and writes `manifest.json` (name, os, arch, sha256, size, version) beside the binaries. `VERSION=1.2.3 ./build.sh` overrides the version.

`packaging/` holds a systemd user unit (`loginctl enable-linger $USER` keeps it running without a login), a launchd plist, a Windows scheduled-task script and a container compose file.

## Tests

`go vet ./... && go test ./...`