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This is an example Reentrancy Guard for teaching purposes
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >=0.7.0 <0.9.0; | |
| contract ReentrancyGuard { | |
| bool private guardLocked; | |
| modifier noReentry() { | |
| require(!guardLocked, "Prevented by noReentry in ReentrancyGuard"); | |
| guardLocked = true; | |
| _; | |
| guardLocked = false; | |
| } | |
| } |
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Used as an example in This Blog Post