Smart Contract

Access Control

// contract AccessControl {
    mapping(address => uint256) public expiration;

    function grantAccess(address user, uint256 duration) public {
        require(balanceOf(user) >= threshold, "Insufficient balance");
        expiration[user] = block.timestamp + duration;
    }

    function hasAccess(address user) public view returns (bool) {
        return block.timestamp < expiration[user];
    }
}

Payment and Burn Logic

// function payAndBurn(uint256 amount) public {
    require(balanceOf(msg.sender) >= amount, "Insufficient funds");
    burnTokens(amount);
    distributeToNodes(amount / 2);
}