Accounts

Accounts

Source

There are two types of accounts in Ethereum - Externally Owned Accounts - Contracts Accounts

Externally owned accounts (EOAs)

An externally controlled account

• has an ether balance,
• can send transactions (ether transfer or trigger contract code),
• is controlled by private keys,
• has no associated code.

Contract accounts

A contract

• has an ether balance,
• has associated code,
• code execution is triggered by transactions or messages (calls) received from other contracts.
• when executed - perform operations of arbitrary complexity - manipulate its own persistent storage, i.e., can have its own permanent state - can call other contracts