Pausability
Explore the Pausable design pattern in Solidity that introduces an emergency stop mechanism to smart contracts. Understand how to implement pause and unpause functions using OpenZeppelin's contracts, manage contract states with modifiers, and secure your contracts from exploits by restricting actions during pauses. Learn to balance contract security with decentralization by implementing pausability alongside ownership control.
We'll cover the following...
The Pausable design pattern
The Pausable design pattern adds an emergency stop mechanism to our contracts, defined in the OpenZeppelin abstract contract Pausable.sol, which can be imported with import "@openzeppelin/contracts/security/Pausable.sol"; command.
Description
This abstract contract is built around an internal boolean variable, _paused, whose value can be set by two virtual, internal functions _pause() and _unpause(), and read by a getter function paused(). ...