> For the complete documentation index, see [llms.txt](https://docs.surged.fun/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.surged.fun/integration/contracts.md).

# Contracts

The package ships these, so you rarely need to copy one:

```ts
import { deployments } from '@surged/sdk'

deployments[5042].launchFactory
```

`GET /config` returns the ones a client needs, read from the chain rather than from a file.

## Arc mainnet, chain id 5042

The full list, with what each contract does, is on [Official addresses](/launchpad/addresses.md). That page is the one to link to when you tell your own users which contracts are Surged's.

A token's own curve is not on that list: there is one per launch, and `GET /launches/{token}` returns it as `curve`.

## Which one you send to

| You want to              | Send to              |
| ------------------------ | -------------------- |
| Buy or sell on the curve | the launch's `curve` |
| Launch a token           | `launchForwarder`    |
| Claim creator fees       | `feeEscrow`          |

## Testnet

Arc testnet is chain id `5042002`, with its own set in `deployments[5042002]`. The contracts are the same code; the addresses are not.

## A redeploy is a version

These addresses live inside the published package, so a redeploy of any contract ships as a minor version bump, never a patch. Pin `~0.2.0` and you stay on contracts that exist.


---

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