use-modular-wallets
Overview
Modular Wallets are flexible smart contract accounts (MSCAs) that extend functionality through installable modules. Built on ERC-4337 (account abstraction) and ERC-6900 (modular smart contract framework), they support passkey authentication, gasless transactions, batch operations, and custom logic modules (multisig, subscriptions, session keys). MSCAs are lazily deployed -- gas fees for account creation are deferred until the first outbound transaction.
Prerequisites / Setup
Installation
npm install @circle-fin/modular-wallets-core viem
For passkey recovery, also install:
npm install bip39
Environment Variables
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