Pausability
Add an emergency stop mechanism to your smart contracts.
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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(). ...