Arc network & USDC

Arc Testnet

• Arc network setup
• USDC on Arc
• ArcScan explorer

Two interfaces, one balance

Native USDC uses 18 decimals for gas and msg.value. The ERC-20 interface uses 6 decimals for balances, transfers and approvals. One USDC is 10^18 native units or 10^6 ERC-20 units. Do not add the two balances together or compare their raw integers.

Archery sends zero native value with pool calls and uses ERC-20 approvals and transferFrom. No wrap or unwrap is needed. A MAX amount must leave enough USDC for the complete transaction's gas; a pending reward cannot pay the upfront fee.

Multicall3From

Multicall3From preserves a directly calling EOA as msg.sender at each batch target. This allows an approval and the action that uses it to share a transaction. Approve the actual Router or Position Manager, not the batch contract.

Archery call helpers use aggregate so a reverting subcall reverts the whole batch. The contract cannot forward msg.value, and it does not insert one function's return value into the next call. Quotes determine the encoded amounts; simulate the complete sequence before signing. Smart wallets require their own compatible execution path.

• Arc transaction extensions

Composed transactions

Arc Mainnet

These documents and all published Archery addresses describe Arc Testnet. Mainnet details will be published separately.