Credits Precompile

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.3;
 
/// @dev The Credits contract's address.
address constant CREDITS = 0x0000000000000000000000000000000000000825;
 
/// @dev The Credits contract's instance.
Credits constant CREDITS_CONTRACT = Credits(CREDITS);
 
/// @author The Tangle Team
/// @title Credits Pallet Interface
/// @notice Interface for interacting with the Tangle Credits system
/// @custom:address 0x0000000000000000000000000000000000000825
interface Credits {
    /// @dev Burn TNT tokens to generate credits
    /// @param amount The amount of TNT to burn
    /// @return Success status (0 for success)
    function burn(uint256 amount) external returns (uint8);
 
    /// @dev Claim accumulated credits
    /// @param amount The amount of credits to claim
    /// @param offchainAccountId The off-chain account identifier
    /// @return Success status (0 for success)
    function claimCredits(
        uint256 amount,
        bytes calldata offchainAccountId
    ) external returns (uint8);
 
    /// @dev Get the current credit emission rate for a staked amount
    /// @param stakedAmount The amount of TNT staked
    /// @return The credits earned per block
    function getCurrentRate(uint256 stakedAmount) external view returns (uint256);
 
    /// @dev Calculate accrued credits for an account
    /// @param account The account to check
    /// @return The amount of claimable credits
    function calculateAccruedCredits(address account) external view returns (uint256);
 
    /// @dev Get the current stake tier configuration
    /// @return thresholds Array of stake thresholds
    /// @return rates Array of emission rates per block
    function getStakeTiers() external view returns (
        uint256[] memory thresholds,
        uint256[] memory rates
    );
 
    /// @dev Get stake tier for a specific asset
    /// @param assetId The asset identifier
    /// @return thresholds Array of stake thresholds
    /// @return rates Array of emission rates per block
    function getAssetStakeTiers(uint256 assetId) external view returns (
        uint256[] memory thresholds,
        uint256[] memory rates
    );
 
    /// @dev Events
    event CreditsGrantedFromBurn(address indexed account, uint256 burned, uint256 credits);
    event CreditsClaimed(address indexed account, uint256 amount, bytes offchainAccountId);
}

contract CreditClaimer {
    Credits constant credits = Credits(0x0000000000000000000000000000000000000825);
 
    function claimMyCredits(uint256 amount, string memory accountId) external {
        // Convert string to bytes for off-chain account ID
        bytes memory offchainId = bytes(accountId);
 
        // Claim the credits
        uint8 result = credits.claimCredits(amount, offchainId);
        require(result == 0, "Claim failed");
    }
}