Registry

The registry is a contract deployed on L1, that contains addresses for the Rollup. It also keeps track of the different versions that have been deployed and let you query prior deployments easily.

Links: Interface (GitHub link), Implementation (GitHub link).

numberOfVersions()

Retrieves the number of versions that have been deployed.

registry_number_of_versions

function numberOfVersions() external view returns (uint256);

^{_{Source code: l1-contracts/src/core/interfaces/messagebridge/IRegistry.sol#L31-L33}}

Name	Description
ReturnValue	The number of versions that have been deployed

getRollup()

Retrieves the current rollup contract.

registry_get_rollup

function getRollup() external view returns (IRollup);

^{_{Source code: l1-contracts/src/core/interfaces/messagebridge/IRegistry.sol#L12-L14}}

Name	Description
ReturnValue	The current rollup

getVersionFor(address _rollup)

Retrieve the version of a specific rollup contract.

registry_get_version_for

function getVersionFor(address _rollup) external view returns (uint256);

^{_{Source code: l1-contracts/src/core/interfaces/messagebridge/IRegistry.sol#L16-L18}}

Name	Description
_rollup	The address of the rollup to lookup
ReturnValue	The version number of _rollup

Edge cases

Will revert with Registry__RollupNotRegistered(_rollup) if the rollup have not been registered.

getSnapshot(uint256 _version)

Retrieve the snapshot of a specific version.

registry_snapshot

/**
 * @notice Struct for storing address of cross communication components and the block number when it was updated
 * @param rollup - The address of the rollup contract
 * @param blockNumber - The block number of the snapshot
 */
struct RegistrySnapshot {
  address rollup;
  uint256 blockNumber;
}

^{_{Source code: l1-contracts/src/core/libraries/DataStructures.sol#L66-L76}}

registry_get_snapshot

function getSnapshot(uint256 _version)
  external
  view
  returns (DataStructures.RegistrySnapshot memory);

^{_{Source code: l1-contracts/src/core/interfaces/messagebridge/IRegistry.sol#L20-L25}}

Name	Description
_version	The version number to fetch data for
ReturnValue.rollup	The address of the rollup for the _version
ReturnValue.blockNumber	The block number of the snapshot creation

getCurrentSnapshot()

Retrieves the snapshot for the current version.

registry_get_current_snapshot

function getCurrentSnapshot() external view returns (DataStructures.RegistrySnapshot memory);

^{_{Source code: l1-contracts/src/core/interfaces/messagebridge/IRegistry.sol#L27-L29}}

Name	Description
ReturnValue.rollup	The address of the rollup for the current _version
ReturnValue.blockNumber	The block number of the snapshot creation