Safety and gas
Smart contracts are public and irreversible, so checks and simple storage matter.
What you will be able to do
- Check effects interactions order.
- Avoid unbounded loops.
- Use custom errors.
In plain English
Smart contracts are public and irreversible, so checks and simple storage matter.
- Check effects interactions order.
- Avoid unbounded loops.
- Use custom errors.
pragma solidity ^0.8.24;
error NotOwner();
contract Owned {
address public owner = msg.sender;
modifier onlyOwner() {
if (msg.sender != owner) revert NotOwner();
_;
}
}Your turn
EasyExplain it back
Answer from memory: What is a reentrancy risk?
TEXT · starter
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Knowledge checkQuestion 1
What is a reentrancy risk?
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