= Security[.readme-notice]NOTE: This document is better viewed at https://docs.openzeppelin.com/contracts/api/securityThese contracts aim to cover common security practices.* {PullPayment}: A pattern that can be used to avoid reentrancy attacks.* {ReentrancyGuard}: A modifier that can prevent reentrancy during certain functions.* {Pausable}: A common emergency response mechanism that can pause functionality while a remediation is pending.TIP: For an overview on reentrancy and the possible mechanisms to prevent it, read our article https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].== Contracts{{PullPayment}}{{ReentrancyGuard}}{{Pausable}}