Arc Testnet

Supported testnet. Sauce supports transactions on Ethereum, Base, Arc and Solana, and the testnets Arc Testnet, Base Sepolia, Ethereum Sepolia, Solana Devnet and Solana Testnet. On Arc Testnet a program compiles and simulates, and the sauce command and the MCP server build its transactions and send them. Arc Testnet is a test network: its coin and tokens have no value.

Fact	Value
Support	supported: transactions are built and sent
Slug (`--chain`)	`arc-testnet`
Chain id	5042002
Kind	EVM
Network	testnet: its coin and tokens have no value
Name in a program	`ArcTestnet`
In TypeScript	`import { ArcTestnet } from "@eco-incorp/sauce"`: its tokens and protocol namespaces are properties of it
Native coin	USDC (USDC), 18 decimals; also the ERC-20 `USDC` (6 decimals), one balance
Minimum base fee	20 gwei: a transaction with a lower `maxFeePerGas` is never included
Sauce	the engine, Kitchen and Routers, at the same addresses on every EVM chain: Deployments
CCTP domain	26

Notes

Arc Testnet is Arc’s model exactly: USDC is the native coin at 18 decimals and the ERC-20 0x3600000000000000000000000000000000000000 at 6, one balance, with the same minimum base fee. Every note on the Arc page holds here too. Its USDC and EURC come from Circle’s faucet. Arc Testnet has no DEX, lending market or oracle in the registry: it is for USDC and EURC moves, CCTP and Circle Gateway. For a pool, a swap, Morpho, Aave or Aerodrome, compile and simulate on arc. USDC has the same address on both; EURC differs, and WETH and USYC exist only on arc.

In a program

Compiled with --chain arc-testnet, a program names Arc Testnet’s tokens and contracts with no import; the same file compiled for another chain resolves each name there, or fails where the chain does not have it.

function main() {
  // `EURC` is Arc Testnet's EURC: `0x89B50855Aa3bE2F677cD6303Cec089B5F319D72a`.
  const held = EURC.balanceOf(pot);
  // `Token(address)` is any other ERC-20, and works for a symbol's address too.
  require(Token(EURC).balanceOf(pot) == held);
  // `Cctp.TokenMessenger` is Arc Testnet's tokenMessenger: `0x8FE6B999Dc680CcFDD5Bf7EB0974218be2542DAA`.
  require(Cctp.TokenMessenger != 0);
  // The same contract, qualified by the chain's name, from a program on any chain.
  require(ArcTestnet.Cctp.TokenMessenger == Cctp.TokenMessenger);
}

Tokens

Symbol	Address	Decimals
`EURC`	`0x89B50855Aa3bE2F677cD6303Cec089B5F319D72a`	6
`USDC`	`0x3600000000000000000000000000000000000000`	6

Protocols

Every protocol the registry records here, each contract with how a program names it: its namespace contract, or its ABI imported from ./protocols/<slug>/<Export>.json and bound to the address.

Protocol	Contract	Address	In a program
CCTP	tokenMessenger	`0x8FE6B999Dc680CcFDD5Bf7EB0974218be2542DAA`	`Cctp.TokenMessenger`
Circle Gateway	gatewayMinter	`0x0022222ABE238Cc2C7Bb1f21003F0a260052475B`	`CircleGateway.GatewayMinter`
Circle Gateway	gatewayWallet	`0x0077777d7EBA4688BDeF3E311b846F25870A19B9`	`CircleGateway.GatewayWallet`

Next steps

Chains: every other chain, with its support.
Names and registries: how a name in a program becomes an address on the chain it is compiled for.
Glossary: the words these pages use, in plain terms.

Start here

Integration guides

Language reference

SauceScript libraries

Runtime and security

Troubleshooting and production

Chains and protocols

@eco-incorp/sauce

@eco-incorp/sauce-compiler

Notes

In a program

Tokens

Protocols

Next steps

​Notes

​In a program

​Tokens

​Protocols

​Next steps

Notes

In a program

Tokens

Protocols

Next steps