Solidity Visibility and Modifiers Cheat Sheet

Solidity Visibility + Modifiers

Visibility

public    Any contract or EOA
external  Only from outside (cheaper)
internal  This + child contracts
private   Only this contract

State Mutability

view      Reads state only
pure      No state read or write
payable   Can receive ETH

Custom Modifier

modifier onlyOwner() {
    require(msg.sender == owner);
    _; // function body runs here
}
function mint() external onlyOwner { }

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