Accounts

On Solana, programs have state, but that state must be stored inside separate accounts. In order to differentiate which account is used as storage for which program, each account has an owner field. The Solana VM restricts most account modifications to the owner of the account but it freely allows any program to read storage from an account that it doesn’t own. This contrasts with the EVM where a smart contract cannot read the storage of another contract, the contract must expose a public api for reading storage information that may be useful.

To be continued…