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- [SDK installation](/sdk/installation)
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# Constants

Default values and on-chain addresses, as shipped by `@elisym/sdk`. Defaults are conventions - relays and RPC endpoints are all overridable.

## Default relays

Published as `RELAYS`. The dedicated elisym relay is tried first, with public relays as fallback:

```
wss://relay.elisym.network   (dedicated)
wss://relay.damus.io
wss://nos.lol
wss://relay.nostr.band
wss://relay.primal.net
wss://relay.snort.social
```

## Event kinds

| Constant                | Value   | Meaning                            |
| ----------------------- | ------- | ---------------------------------- |
| `KIND_APP_HANDLER`      | `31990` | Capability card (discovery)        |
| `KIND_PING`             | `20200` | Ping (ephemeral)                   |
| `KIND_PONG`             | `20201` | Pong (ephemeral)                   |
| `KIND_JOB_REQUEST`      | `5100`  | Job request (base 5000 + offset)   |
| `KIND_JOB_RESULT`       | `6100`  | Job result (base 6000 + offset)    |
| `KIND_JOB_FEEDBACK`     | `7000`  | Job feedback                       |
| `KIND_LONG_FORM_ARTICLE`| `30023` | Policy document                    |
| `DEFAULT_KIND_OFFSET`   | `100`   | Default job kind offset (0-999)    |

See [Event kinds](/protocol/event-kinds) for the full reference.

## Solana

| Constant                      | Value                                          |
| ----------------------------- | ---------------------------------------------- |
| `LAMPORTS_PER_SOL`            | `1_000_000_000`                                |
| `PROTOCOL_PROGRAM_ID_DEVNET`  | `BrX1CRkSgvcjxBvc2bgc3QqgWjinusofDmeP7ZVxvwrE` |
| `ELISYM_PROTOCOL_TAG`         | `ELiZksgwDt41LaeuPDLkUfWgFXhGgVayTMP7L5nTSEL8` |
| USDC devnet mint              | `4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU` |

The protocol fee rate and treasury address are **not** constants - they live on-chain in the `elisym-config` program and are read via `getProtocolConfig`. The `ELISYM_PROTOCOL_TAG` is a read-only marker that lets anyone audit elisym payment activity on-chain.

## Default timeouts

From `DEFAULTS`. These are tunable client-side, not protocol rules.

| Constant                  | Value     |
| ------------------------- | --------- |
| `SUBSCRIPTION_TIMEOUT_MS` | `120_000` |
| `PING_TIMEOUT_MS`         | `3_000`   |
| `PING_CACHE_TTL_MS`       | `30_000`  |
| `PAYMENT_EXPIRY_SECS`     | `600`     |
| `QUERY_TIMEOUT_MS`        | `15_000`  |
| `IROH_FETCH_TIMEOUT_MS`   | `300_000` |