{
    "Function": "roll",
    "File": "contracts/Cauldron.sol",
    "Parent Contracts": [
        "contracts/utils/access/AccessControl.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "require(bool,string)",
        "_tweak",
        "_level",
        "vaultData",
        "require(bool,string)",
        "auth",
        "_pour"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function roll(bytes12 vaultId, bytes6 newSeriesId, int128 art)\n        external\n        auth\n        returns (DataTypes.Vault memory, DataTypes.Balances memory)\n    {\n        (DataTypes.Vault memory vault_, DataTypes.Series memory oldSeries_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n        DataTypes.Series memory newSeries_ = series[newSeriesId];\n        require (oldSeries_.baseId == newSeries_.baseId, \"Mismatched bases in series\");\n        \n        // Change the vault series\n        vault_.seriesId = newSeriesId;\n        _tweak(vaultId, vault_);\n\n        // Change the vault balances\n        balances_ = _pour(vaultId, vault_, balances_, newSeries_, 0, art);\n\n        require(_level(vault_, balances_, newSeries_) >= 0, \"Undercollateralized\");\n        emit VaultRolled(vaultId, newSeriesId, balances_.art);\n\n        return (vault_, balances_);\n    }"
}