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.