{
    "Function": "stakeNRN",
    "File": "src/RankedBattle.sol",
    "Parent Contracts": [],
    "High-Level Calls": [
        "FighterFarm",
        "Neuron",
        "Neuron",
        "FighterFarm",
        "Neuron",
        "StakeAtRisk"
    ],
    "Internal Calls": [
        "require(bool,string)",
        "_getStakingFactor",
        "require(bool,string)",
        "require(bool,string)",
        "require(bool,string)"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function stakeNRN(uint256 amount, uint256 tokenId) external {\n        require(amount > 0, \"Amount cannot be 0\");\n        require(_fighterFarmInstance.ownerOf(tokenId) == msg.sender, \"Caller does not own fighter\");\n        require(_neuronInstance.balanceOf(msg.sender) >= amount, \"Stake amount exceeds balance\");\n        require(hasUnstaked[tokenId][roundId] == false, \"Cannot add stake after unstaking this round\");\n\n        _neuronInstance.approveStaker(msg.sender, address(this), amount);\n        bool success = _neuronInstance.transferFrom(msg.sender, address(this), amount);\n        if (success) {\n            if (amountStaked[tokenId] == 0) {\n                _fighterFarmInstance.updateFighterStaking(tokenId, true);\n            }\n            amountStaked[tokenId] += amount;\n            globalStakedAmount += amount;\n            stakingFactor[tokenId] = _getStakingFactor(\n                tokenId, \n                _stakeAtRiskInstance.getStakeAtRisk(tokenId)\n            );\n            _calculatedStakingFactor[tokenId][roundId] = true;\n            emit Staked(msg.sender, amount);\n        }\n    }"
}