write short note on EOA and contracts address?

EOA stands for Externally Owned Account in the context of Ethereum blockchain. These accounts are controlled by private keys and have no associated code with them. They are the user accounts that can interact with the Ethereum network. They can send transactions (transferring Ether, deploying contracts, calling contract functions), and the transactions they send are included in the blockchain.

A contract address in Ethereum is a specific type of account that has an associated code and is controlled by this code. Unlike EOAs, contract accounts cannot initiate new transactions on their own, they only do so in response to other transactions they have received (from an EOA or from another contract account). The contract code defines the rules and functions that the contract account can perform. The contract address is determined at the time of contract creation and is derived from the creator's address and the number of transactions the creator has sent.

In summary, EOAs and contract addresses are two types of accounts in the Ethereum network. EOAs are controlled by private keys and can initiate transactions, while contract addresses are controlled by their associated code and can only perform transactions in response to received transactions.