github.com/ethereum-optimism/optimism@v1.7.2/packages/contracts-bedrock/snapshots/storageLayout/L2ToL1MessagePasser.json (about)

     1  [
     2    {
     3      "bytes": "32",
     4      "label": "sentMessages",
     5      "offset": 0,
     6      "slot": "0",
     7      "type": "mapping(bytes32 => bool)"
     8    },
     9    {
    10      "bytes": "30",
    11      "label": "msgNonce",
    12      "offset": 0,
    13      "slot": "1",
    14      "type": "uint240"
    15    }
    16  ]