[General] Can we consider all accounts in zkSync as smart contract accounts?

[bxpana]

Environment

Testnet

Provide a brief description of the functionality you're trying to implement and the issue you are running into.

I have recently come across the DefaultAccount in the zkSync contracts codebase.

The zkSync docs say that zkSync has two kinds of accounts, EoAs and smart contracts, but if all EoAs are actually this implementation of smart contract wouldn't we consider all EoA also smart contract accounts?

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[gleenai[bot]]

In zkSync, the concept of accounts differs significantly from that in Ethereum due to the implementation of account abstraction. In zkSync, all accounts, including what are traditionally known as Externally Owned Accounts (EOAs), are treated as smart contract accounts. This is because every address that does not have explicit contract code deployed on it implicitly contains the code defined in the DefaultAccount.sol. This contract is executed whenever a transaction is initiated from such an address.

Here are some key points about account handling in zkSync:

• Account Types: Both smart contract accounts and EOAs in zkSync behave like smart contract accounts due to the underlying account abstraction layer.
• DefaultAccount.sol: This contract acts as the implicit code for addresses that do not have their own deployed contract code. It enables basic transaction and interaction capabilities for these addresses.
• Unified Treatment: This approach allows for a unified treatment of all accounts, simplifying interactions and integrations on the network.

Therefore, in the context of zkSync, it is accurate to consider all accounts, including EOAs, as types of smart contract accounts due to the way transactions are processed and the capabilities that each account has through the DefaultAccount.sol implementation. This is a fundamental aspect of zkSync's design to enhance flexibility and functionality across the network.

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