ArcSuite

ArcSuite is a unified cross-chain operations hub built into UnitFlow. It consolidates four distinct actions (bridge, swap, send, and cross-chain swap) into a single tabbed interface, all powered by Circle's App Kit SDK (@circle-fin/app-kit).

Key Highlights

Tabs

Bridge

Transfers USDC between any two supported chains via CCTP. The bridge flow executes four on-chain steps:

1. Approve USDC - grants the TokenMessenger allowance.
2. Burn on source chain - calls depositForBurn via the App Kit.
3. Await CCTP attestation - polls Circle's attestation service until the burn is signed.
4. Mint on destination chain - calls receiveMessage on the destination MessageTransmitter.

Both the source and destination chains are automatically added to the user's wallet if not already present. A step-by-step progress tracker is shown during the transaction.

The fee is inclusive: the protocol deducts min($0.01, 1% of amount) from the entered amount so the user's total wallet debit equals exactly what they typed. The fee is forwarded to the protocol fee recipient via AppKit.bridge({ config: { customFee: { value, recipientAddress } } }).

Swap

Swaps stablecoins on Arc Testnet using the App Kit's kit.swap() method. Currently supports USDC / EURC on Arc Testnet.

Before executing, the UI calls kit.estimateSwap() on blur to show the estimated output, minimum received, and protocol fee breakdown. The swap call is proxied through a local Next.js API route to avoid CORS restrictions on Circle's API.

Send

Sends USDC, EURC, or the native token to any wallet address on a supported chain using kit.send(). The recipient address is validated as a checksummed EVM address before submission.

Cross-Chain Swap

Combines a swap and a bridge into a single two-step flow:

1. Swap on Arc Testnet - swaps the input token (EURC or USDC) to USDC using kit.swap().
2. Bridge to destination - bridges the USDC output from Arc Testnet to the chosen destination chain via CCTP using kit.bridge().

Both Arc Testnet and the destination chain are added to the wallet automatically before execution begins. The UI shows separate progress trackers for each step. The bridge amount is taken directly from the swap's amountOut, with the inclusive bridge fee deducted before the CCTP call.

Supported Chains

SDK Integration

ArcSuite uses two Circle packages:

• @circle-fin/app-kit - provides the AppKit class with bridge(), swap(), estimateSwap(), and send() methods.
• @circle-fin/adapter-viem-v2 - wraps the connected wallet's EIP-1193 provider into a viem-compatible adapter via createViemAdapterFromProvider().

The EIP-1193 provider is obtained from the active wagmi connector using a getEIP1193Provider(connector, walletClient) helper that handles both injected and WalletConnect connectors.

Fee Configuration

Component Structure