avoiding_common_attacks.md

Avoiding Common Attacks

Integer overflows/underflows

I'm avoiding integer overflows/underflows by using OpenZeppelin’s SafeMath library. Check Property.sol contract.

DoS with (Unexpected) revert

By setting up a pull payment system. Check withdraw at Property.sol contract.

Reentrancy on a Single Function

By changing state before sending ETH. Check withdraw at Property.sol contract.

Race conditions and cross-function state dependency

This attack could've occured by leveraging two functions, buyShare at Property.sol and _transfer at ERC20, this prevented at _transfer as the sender balance is reduced before receiver balance increased.