# ReleaseRegistry [Git Source](https://github.com/yearn/vault-periphery/blob/516f95edcd36e28b714b52408c05009b430900e3/src/registry/ReleaseRegistry.sol) **Inherits:** Governance2Step **Author:** yearn.finance Used by Yearn Governance to track onchain all releases of the V3 vaults by API Version. ## State Variables ### name ```solidity string public constant name = "Yearn V3 Release Registry"; ``` ### numReleases ```solidity uint256 public numReleases; ``` ### factories ```solidity mapping(uint256 => address) public factories; ``` ### tokenizedStrategies ```solidity mapping(uint256 => address) public tokenizedStrategies; ``` ### releaseTargets ```solidity mapping(string => uint256) public releaseTargets; ``` ## Functions ### constructor ```solidity constructor(address _governance) Governance2Step(_governance); ``` ### latestFactory Returns the latest factory. ```solidity function latestFactory() external view virtual returns (address); ``` **Returns** |Name|Type|Description| |----|----|-----------| |``|`address`|The address of the factory for the latest release.| ### latestTokenizedStrategy Returns the latest tokenized strategy. ```solidity function latestTokenizedStrategy() external view virtual returns (address); ``` **Returns** |Name|Type|Description| |----|----|-----------| |``|`address`|The address of the tokenized strategy for the latest release.| ### latestRelease Returns the api version of the latest release. ```solidity function latestRelease() external view virtual returns (string memory); ``` **Returns** |Name|Type|Description| |----|----|-----------| |``|`string`|The api version of the latest release.| ### newRelease Issue a new release using a deployed factory. *Stores the factory address in `factories` and the release target in `releaseTargets` with its associated API version. Throws if caller isn't `governance`. Throws if the api version is the same as the previous release. Throws if the factory does not have the same api version as the tokenized strategy. Emits a `NewRelease` event.* ```solidity function newRelease(address _factory, address _tokenizedStrategy) external virtual onlyGovernance; ``` **Parameters** |Name|Type|Description| |----|----|-----------| |`_factory`|`address`|The factory that will be used create new vaults.| |`_tokenizedStrategy`|`address`|| ## Events ### NewRelease ```solidity event NewRelease( uint256 indexed releaseId, address indexed factory, address indexed tokenizedStrategy, string apiVersion ); ```