# Arc Testnet Support > DFNS now supports Arc’s testnet. - Author: Chris Sutton (Chief Product Officer) - Published: 2026-06-05 - Category: Product - Canonical: https://dfns.co/article/arc-testnet-support/ - All DFNS articles: https://dfns.co/llms-full.txt --- DFNS now supports Arc on its public testnet, bringing the open, purpose-built Layer 1 blockchain designed by Circle into the DFNS platform as a fully operational environment for institutions and developers building payments, FX, treasury, and tokenized asset applications on stablecoin-native rails. ## What is Arc? Arc is an enterprise-grade public Layer 1 designed by Circle, purpose-built for the world’s financial markets, real-time money movement, and agentic economic activity. Key technical characteristics include: * **USDC as native gas:** transaction fees are paid in USDC by default, giving predictable, dollar-denominated costs and removing the need to hold a volatile native token. * **Full EVM compatibility:** developers can build on Arc using familiar Ethereum tooling such as Solidity, Foundry, and Hardhat rather than learning a new environment. * **Deterministic sub-second finality:** Arc uses the Malachite BFT consensus engine, a high-performance implementation of Tendermint, to deliver finality in under one second. * **Built-in FX engine:** StableFX is a native FX layer that supports real-time stablecoin conversions. * **Opt-in privacy:** an optional privacy layer, exposed through an EVM precompile, will enable enterprises to selectively shield sensitive financial data while preserving auditability. * **Circle platform integration:** native support for USDC, EURC, USYC, Wallets, CCTP, Gateway, and Circle Payments Network (CPN). * **Designed for all tokenized value:** beyond USDC, Arc is built to host other stablecoins, tokenized deposits, and tokenized equities, and commodities. ## Full testnet support on DFNS DFNS provides support for Arc testnet, giving institutions and developers access to a complete, programmable wallet infrastructure layer: * **Wallet creation:** provisioning via API and dashboard * **Native transfers:** send and receive testnet USDC * **Token transfers:** support for tokens deployed on Arc, including stablecoins and tokenized assets * **Smart contract execution:** interact with onchain applications and financial workflows * **Transaction broadcast:** submit transactions to Arc testnet * **Secure signing:** all operations run through DFNS' key orchestrator (MPC, HSM, Offline Signer) * **Balance retrieval:** query USDC and token balances across wallets * **Webhook notifications:** real-time transaction and balance updates All operations are secured by DFNS' zero trust architecture trusted by 400+ fintechs and institutions globally, with SOC 2 Type II, ISO 27001, ISO 27017, and ISO 27018 certifications. ## Use cases Arc's combination of stablecoin gas, EVM compatibility, sub-second finality, and a built-in FX engine makes it a strong environment for institutional payments and settlement use cases. Examples include: * **Stablecoin payments and settlement:** leverage Arc's predictable stablecoin fees and sub-second finality for high-throughput payment flows * **Cross-border FX:** use StableFX for real-time multi-currency stablecoin conversions across corridors * **Treasury automation:** manage stablecoin and token balances programmatically with approval quorums, and audit trails built in * **Real-world asset tokenization:** issue, manage, and transfer tokenized financial assets with a unified infrastructure and granular approval workflows * **Cross-chain applications:** connect Arc to 20+ supported networks through CCTP and Gateway, orchestrating flows across chains from a single DFNS control plane Adding Arc testnet means institutions can build, test, and validate their Arc integration on DFNS now, with a clear path to production wallet operations when Arc goes live. Arc joins 60+ blockchain networks supported on DFNS, powering digital asset operations for 400+ institutional clients worldwide. Learn more about Arc: [arc.io](https://arc.io) Get started on DFNS: [app.dfns.io](https://app.dfns.io/) Circle has a commercial relationship with DFNS. Arc testnet is offered by Circle Technology Services, LLC (“CTS”). CTS is a software provider and does not provide regulated financial or advisory services. You are solely responsible for services you provide to users, including obtaining any necessary licenses or approvals and otherwise complying with applicable laws. Arc has not been reviewed or approved by the New York State Department of Financial Services. The product features described in these materials are for informational purposes only. All product features may be modified, delayed, or cancelled without prior notice, at any time and at the sole discretion of Circle Technology Services, LLC. Nothing herein constitutes a commitment, warranty, guarantee or investment advice.