Account Abstraction (EVM)
Learn about the key concepts of Account-Abstraction as implemented in JapserVault
Key Terms from ERC-4337
Account Abstraction
Most generally, Account Abstraction (AA) aims to circumvent the limits of status quo externally-owned accounts for users, introducing more efficient and maintainable ways for them to interact with Ethereum.
In ERC-4337, this is achieved via the introduction a separate transaction-like system. The core components of this system are as follows:
UserOperations
A simple data structure that describes a transaction that is being initiated on behalf of a user.
It must not be confused with an EVM transaction, although it is similar. They can be considered pseudo-transaction objects.
User Operation Mempool
This is a separate mempool where pending UserOperations are sent.
Bundlers
These are nodes that listen in on at least one UserOperation mempool and bundle UserOperations into batches for execution in a single transaction, which involves invoking the EntryPoint.handleOps().
Entrypoint
Each chain is to have just a single whitelisted EntryPoint contract deployed. Bundlers whitelist the supported EntryPoint.
The EntryPoint verifies and executes the bundles of UserOperations sent to it.
Paymaster
A contract that sponsors the gas fees for transactions initiated for the UserOperations of users.
Further Readings
Many existing resources go into greater detail on these concepts.
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