Build Next-Gen Biometric dApps

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IROYIToken {
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    function burn(uint256 amount) external;
}

contract BiometricPaymaster {
    IROYIToken public immutable royiToken;
    address public immutable stakingVault;
    address public immutable treasury;

    constructor(address _royi, address _vault, address _treasury) {
        royiToken = IROYIToken(_royi);
        stakingVault = _vault;
        treasury = _treasury;
    }

    function processVerificationFee(address user, uint256 feeAmount) external {
        // Collect ROYI verification fee
        royiToken.transferFrom(user, address(this), feeAmount);

        // Organic Real-Yield Distribution: 50% Staking, 30% Burn, 20% Treasury
        uint256 stakingShare = (feeAmount * 50) / 100;
        uint256 burnShare = (feeAmount * 30) / 100;
        uint256 treasuryShare = feeAmount - stakingShare - burnShare;

        royiToken.transferFrom(address(this), stakingVault, stakingShare);
        royiToken.burn(burnShare); // Send to null address 0x000...000
        royiToken.transferFrom(address(this), treasury, treasuryShare);
    }
}