Glossary
This glossary defines common Smart Accounts Kit terms used across the documentation.
Account abstraction
A mechanism that enables users to manage smart contract accounts containing arbitrary verification logic.
Advanced Permissions
Fine-grained, customizable transaction capabilities that dapps can request from MetaMask extension users.
Bundler
A service that collects user operations from smart accounts, packages them, and submits them to the network.
Caveat
A restriction attached to a delegation that limits how delegated authority can be used.
Caveat enforcer
A smart contract that enforces delegation rules by validating caveat conditions during redemption hooks.
Delegate account
The account that receives delegated authority and can redeem a delegation under its constraints.
Delegation
The ability for a MetaMask smart account to authorize another account to perform specific executions on its behalf.
Delegation Framework
A set of audited smart contracts that handle smart account creation, the delegation lifecycle, and caveat enforcement.
Delegation Manager
The component that validates and redeems delegations, including signature checks and caveat enforcer hooks.
Delegation scope
A predefined authority pattern that sets the initial actions a delegate is allowed to perform.
Delegator account
The account that creates and signs a delegation to grant limited authority to another account.
EIP-7702 smart account
A stateless MetaMask smart account implementation that represents an upgraded EOA.
Externally owned account (EOA)
A private-key-controlled account with no built-in programmable execution logic.
Hybrid smart account
A smart account implementation that supports both an EOA owner and passkey signers.
MetaMask smart account
A smart contract account that supports programmable behavior, delegated permissions, flexible signing options, and other advanced features.
Multisig smart account
A smart account that requires signatures from multiple configured signers to satisfy a threshold.
Open delegation
A delegation that leaves the delegate unspecified, allowing any account to redeem it.
Open redelegation
A redelegation with no specific delegate, allowing any account to redeem inherited permissions.
Passkey
A cryptographic key that can be used to sign transactions instead of a private key.
Paymaster
A service that pays for user operations on behalf of a smart account.
Public Client
An interface for fetching blockchain state, reading from smart contracts, and monitoring transactions.
Redelegation
A delegation that passes on a subset of authority granted by a previous delegation.
Root delegation
The first delegation in a chain, where an account delegates its own authority directly.
Signer
An account that can sign transactions for a smart account.
Smart Accounts Kit
Toolkit for creating, managing, and interacting with MetaMask Smart Accounts, delegations, and Advanced Permissions.
User operation
A signed instruction package that tells a smart account what executions to perform.
Wallet Client
An interface for interacting with blockchain accounts, executing transactions, and signing messages.