> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/api/linea-smart-contracts/messageservice/l2/v1/l2messagemanagerv1.md](https://docs.linea.build/api/linea-smart-contracts/messageservice/l2/v1/l2messagemanagerv1.md). # L2MessageManagerV1 # `L2MessageManagerV1` ### INBOX_STATUS_UNKNOWN ```solidity uint8 INBOX_STATUS_UNKNOWN ``` The 3 status constants for L1 to L2 message statuses. ### INBOX_STATUS_RECEIVED ```solidity uint8 INBOX_STATUS_RECEIVED ``` ### INBOX_STATUS_CLAIMED ```solidity uint8 INBOX_STATUS_CLAIMED ``` ### inboxL1L2MessageStatus ```solidity mapping(bytes32 => uint256) inboxL1L2MessageStatus ``` _Mapping to store L1->L2 message hashes status. messageHash => messageStatus (0: unknown, 1: received, 2: claimed)._ ### _updateL1L2MessageStatusToClaimed ```solidity function _updateL1L2MessageStatusToClaimed(bytes32 _messageHash) internal ``` Update the status of L1->L2 message when a user claims a message on L2. #### Parameters | Name | Type | Description | | --- | --- | --- | | _messageHash | bytes32 | Hash of the message. | Contributions not accepted These reference pages are automatically generated based on Linea's [smart contracts](https://github.com/Consensys/linea-monorepo/tree/main/contracts/src). To ensure they accurately match the deployed smart contracts, we cannot accept any contributions that edit these pages.