Aarc

Aarc is a modular, chain-agnostic account abstraction toolkit that bundles wallets, liquidity and gas markets into one SDK, so an app supports several smart wallets from a single integration. Developers pick the wallet implementation they need among Safe, Biconomy, Alchemy or ZeroDev instead of adapting to each separately.

The SDK wraps Permit2 batch approvals, ERC20Permit signatures and EIP-2771 relaying, letting users pay gas in stablecoins or have the app sponsor it; on the cross-chain side it treats one user's smart accounts across networks as a single logical account so assets can be moved between chains. For existing externally owned accounts it provides a migration path that moves assets into a smart account while the user keeps control of the original address. A session key's lifetime and call scope are bounded by policy, and one approval cannot exceed the preset contract whitelist; for batch operations the SDK merges several calls into a single signature, cutting the number of confirmations.