> ## Documentation Index
> Fetch the complete documentation index at: https://na-834f3010.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Arc

> App Kit flows, Arc decimals, StableFX, and marketplace settlement.

Arc Testnet chain id is `5042002`. CCTP domain is `26`. Marketplace settlement uses Arc USDC ERC-20 at `0x3600…0000` with 6 decimals.

| Group                | Actions                                                                                              |
| -------------------- | ---------------------------------------------------------------------------------------------------- |
| Bridge / swap / send | Bridge USDC, retry, swap, swap+bridge, status, send                                                  |
| Unified balance      | Deposit, depositFor, spend (needs a delegate), delegates, remove fund, balances                      |
| Estimates            | Bridge, swap, send, spend, token rates, supported chains                                             |
| Chain                | Config, genesis addresses, native vs ERC-20 USDC, EURC, gas floor, finality, memo, deploy/read/write |
| Identity             | ERC-8004 register, ERC-8183 job                                                                      |
| StableFX             | Quote, execute taker, status                                                                         |

Privy server wallets cannot sign Gateway spends. Add a delegate first.