avoiding_common_attacks.md

Avoiding Common Attacks

Use Specific Compiler Pragma

Used a specific compiler version pragma solidity 0.8.0 which has overflow checks and SafeMath built in.

Use Modifiers Only for Validation

hasFunds

• validates user's account balance has sufficient funds for withdraw amount

isHodler

• validates a user has held a deposit in the bank for a specified length of time before rewarding with Galleon ERC20 tokens

Re-entrancy Guard

nonReentrant functions

• deposit
• withdraw (wei)
• transfer ERC20 tokens to user