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All addresses on this page are for Arc Testnet. Mainnet addresses are not yet available.

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Stablecoins

Stablecoins are the foundation of the Arc ecosystem, supporting a growing set of fiat-backed and yield-bearing tokens. These assets provide price stability, onchain yield, and multi-currency support for payments, FX, and financial applications. The ERC-20 functions affect native balance movements.

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USDC

USDC is the native EVM asset on Arc and is used for gas fees. An optional ERC-20 interface is also available for developers who need features such as transferFrom, approve, and allowance management. See Stablecoin native model for details on how the native and ERC-20 interfaces share the same underlying balance.
Getting testnet USDC: You can request USDC on Arc Testnet from the Circle Faucet. USDC is required to pay for gas and interact with contracts on Arc.Note: As with any ERC-20 token, always use the decimals() function to interpret balances and transfer amounts accurately. On Arc, the native USDC gas token uses 18 decimals of precision, while the USDC ERC-20 interface uses 6 decimals. Avoid mixing these values directly, as doing so may result in incorrect balance handling. For applications integrating USDC, it’s recommended to rely solely on the standard ERC-20 interface for reading balances and sending transfers.

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EURC

EURC is the euro-denominated stablecoin issued by Circle and supported natively on Arc for use in payments, FX, and other financial applications.
Getting testnet EURC: Testnet EURC can be requested from the Circle Faucet. Select Arc Testnet as the network and EURC as the token to receive a small test allocation.

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USYC

USYC is a yield-bearing token issued by Circle International Bermuda Ltd. and supported on Arc for institutional and DeFi use cases. It represents shares of a tokenized money market fund backed by short-duration U.S. Treasury securities, offering onchain access to regulated, low-risk yield.
USYC is only accessible to institutions outside the United States, subject to eligibility restrictions and a $100,000 USD minimum investment. See USYC Document Certification Requirements for more information.
Getting testnet USYC:
  1. Obtain testnet USDC from the Circle Faucet.
  2. Request allowlisting by opening a ticket with Circle Support and include your Arc Testnet wallet address. Requests are typically processed in 24–48 hours.
  3. Once approved, call the USYC Teller contract or interact with the USYC Portal to deposit testnet USDC and receive testnet USYC.
For more information on issuance, redemption, and eligibility, see USYC Overview.

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Crosschain

The contracts below enable crosschain interoperability between Arc and other blockchains through Circle’s Cross-Chain Transfer Protocol (CCTP) and Gateway. CCTP handles crosschain message passing and stablecoin transfers, while Gateway provides chain-abstracted USDC balances for seamless liquidity movement.

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CCTP

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Gateway

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Payments and settlement

Arc provides payment and settlement contracts that enable foreign exchange and onchain settlement workflows using stablecoins. These components support application-level use cases such as FX execution and escrow-based settlement.

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StableFX

StableFX is an enterprise-grade stablecoin FX engine that combines Request-for-Quote (RFQ) execution with onchain settlement on Arc. The following is the address for the escrow contract used to settle stablecoin swaps.
Before executing FX trades, StableFX must be able to transfer USDC from your wallet. To enable this, you need to grant a USDC allowance to the Permit2 contract. See the Common Ethereum contracts section for the Permit2 address.

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Transaction extensions

Arc provides predeployed contracts for attaching memos to transactions and batching calls with sender preservation. Both contracts route subcalls through the CallFrom precompile, which preserves the original msg.sender in each subcall.
Offchain blocklist operators: If you maintain an offchain blocklist or compliance screening system, you must include the Memo and Multicall3From contract addresses. These contracts preserve msg.sender through the CallFrom precompile, meaning the original caller’s address appears as the sender in subcalls. Your monitoring should account for transactions routed through these contracts to ensure blocklist enforcement is not bypassed.

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Common Ethereum contracts

Arc Testnet includes a set of widely used Ethereum ecosystem contracts for deterministic deployment, batched reads, and standardized token approvals. Although not Circle-managed, these contracts are deployed on Arc to ensure compatibility with common EVM tooling and workflows.

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Test addresses for restricted transfer behavior

To help you exercise the value transfer revert paths described in EVM differences, Arc Testnet seeds a well-known blocklisted address derived from the standard test mnemonic test test test test test test test test test test test junk. Because the mnemonic is public, you can derive its private key locally and sign as the address, for example with Foundry:
Use this address to confirm your contract handles a runtime revert on a value transfer (including as a SELFDESTRUCT beneficiary). See EVM differences for the full set of rules.