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# Audits
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| Date | Version | Commit | Auditor | Scope | Links |
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| ------------- | ------- | -------------------------------------------------------------------------------- | ------------ | -------------------- | ----------------------------------------------------------- |
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| December 2024 | v5.2.0 | [`98d28f9`](https://github.com/openzeppelin/openzeppelin-contracts/tree/98d28f9) | OpenZeppelin | v5.2 Changes | [🔗](./2024-12-v5.2.pdf) |
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| October 2024 | v5.1.0 | [`aba9ff6`](https://github.com/openzeppelin/openzeppelin-contracts/tree/aba9ff6) | OpenZeppelin | v5.1 Changes | [🔗](./2024-10-v5.1.pdf) |
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| October 2023 | v5.0.0 | [`b5a3e69`](https://github.com/openzeppelin/openzeppelin-contracts/tree/b5a3e69) | OpenZeppelin | v5.0 Changes | [🔗](./2023-10-v5.0.pdf) |
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| May 2023 | v4.9.0 | [`91df66c`](https://github.com/openzeppelin/openzeppelin-contracts/tree/91df66c) | OpenZeppelin | v4.9 Changes | [🔗](./2023-05-v4.9.pdf) |
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| October 2022 | v4.8.0 | [`14f98db`](https://github.com/openzeppelin/openzeppelin-contracts/tree/14f98db) | OpenZeppelin | ERC4626, Checkpoints | [🔗](./2022-10-ERC4626.pdf) [🔗](./2022-10-Checkpoints.pdf) |
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| October 2018 | v2.0.0 | [`dac5bcc`](https://github.com/openzeppelin/openzeppelin-contracts/tree/dac5bcc) | LevelK | Everything | [🔗](./2018-10.pdf) |
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| March 2017 | v1.0.4 | [`9c5975a`](https://github.com/openzeppelin/openzeppelin-contracts/tree/9c5975a) | New Alchemy | Everything | [🔗](./2017-03.md) |
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# Formal Verification
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| Date | Version | Commit | Tool | Scope | Links |
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| ------------ | ------- | --------- | ------- | -------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
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| May 2022 | v4.7.0 | `109778c` | Certora | Initializable, GovernorPreventLateQuorum, ERC1155Burnable, ERC1155Pausable, ERC1155Supply, ERC1155Holder, ERC1155Receiver | [🔗](../certora/reports/2022-05.pdf) |
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| March 2022 | v4.4.0 | `4088540` | Certora | ERC20Votes, ERC20FlashMint, ERC20Wrapper, TimelockController, ERC721Votes, Votes, AccessControl, ERC1155 | [🔗](../certora/reports/2022-03.pdf) |
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| October 2021 | v4.4.0 | `4088540` | Certora | Governor, GovernorCountingSimple, GovernorProposalThreshold, GovernorTimelockControl, GovernorVotes, GovernorVotesQuorumFraction | [🔗](../certora/reports/2021-10.pdf) |
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