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// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

// Contracts
import {YieldInbox} from "src/YieldInbox.sol";

// Libraries
import {ERC20} from "lib/solmate/src/tokens/ERC20.sol";
import {SafeTransferLib} from "lib/solmate/src/utils/SafeTransferLib.sol";
import {FixedPointMathLib} from "lib/solmate/src/utils/FixedPointMathLib.sol";

// Interfaces
import {IBlast} from "src/interfaces/IBlast.sol";
import {IBlastPoints} from "src/interfaces/IBlastPoints.sol";
import {IERC20Rebasing, YieldMode} from "src/interfaces/IERC20Rebasing.sol";

contract ybUSDB is ERC20 {
  using SafeTransferLib for address;
  using SafeTransferLib for IERC20Rebasing;
  using FixedPointMathLib for uint256;

  // Errors
  error ZeroAssets();
  error ZeroShares();

  // Configs
  address public dev;
  IBlastPoints public immutable blastPoints;
  IERC20Rebasing public immutable asset;
  YieldInbox public immutable yieldInbox;

  // States
  uint256 internal _totalAssets;

  // Events
  event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares);
  event Withdraw(
    address indexed caller, address indexed receiver, address indexed owner, uint256 assets, uint256 shares
  );

  constructor(IERC20Rebasing _usdb, IBlast _blast, IBlastPoints _blastPoints, address _blastPointsOperator)
    ERC20("ybUSDB", "ybUSDB", 18)
  {
    // Effect
    dev = msg.sender;
    blastPoints = _blastPoints;
    asset = _usdb;
    yieldInbox = new YieldInbox();

    // Config before deposit dead shares
    asset.configure(YieldMode.CLAIMABLE);
    _blast.configureClaimableGas();
    _blast.configureGovernor(msg.sender);
    _blastPoints.configurePointsOperator(_blastPointsOperator);

    deposit(0.1 ether, address(0));
  }

  /// @notice Claim all pending yield and update _totalAssets.
  function claimAllYield() public {
    uint256 _claimable = asset.getClaimableAmount(address(this));
    if (_claimable == 0) return;

    _claimable = asset.claim(address(yieldInbox), _claimable);
    yieldInbox.crawlBack(asset, address(this), _claimable);
    _totalAssets += _claimable;
  }

  /// @notice Deposit USDB to mint ybUSDB.
  /// @dev This function follows ERC-4626 standard.
  /// @param _assets The amount of USDB to deposit.
  /// @param _receiver The receiver of ybUSDB.
  function deposit(uint256 _assets, address _receiver) public returns (uint256 _shares) {
    // Claim all pending yield
    claimAllYield();

    // Check for rounding error.
    if ((_shares = previewDeposit(_assets)) == 0) revert ZeroShares();

    // Transfer from depositor
    asset.safeTransferFrom(msg.sender, address(this), _assets);

    // Effect
    // Update totalAssets
    _totalAssets += _assets;
    // Mint ybUSDB
    _mint(_receiver, _shares);

    // Log
    emit Deposit(msg.sender, _receiver, _assets, _shares);
  }

  /// @notice Mint ybUSDB by specifying the amount of ybUSDB to mint.
  /// @param _shares The amount of ybUSDB to mint.
  /// @param _receiver The receiver of ybUSDB.
  function mint(uint256 _shares, address _receiver) external returns (uint256 _assets) {
    // Claim all pending yield
    claimAllYield();

    _assets = previewMint(_shares);

    // Transfer from depositor
    asset.safeTransferFrom(msg.sender, address(this), _assets);

    // Effect
    // Update totalAssets
    _totalAssets += _assets;
    // Mint ybUSDB
    _mint(_receiver, _shares);

    // Log
    emit Deposit(msg.sender, _receiver, _assets, _shares);
  }

  /// @notice Redeem ybUSDB to USDB by specifying the amount of ybUSDB to redeem.
  /// @dev This function follows ERC-4626 standard.
  /// @param _shares The amount of ybUSDB to redeem.
  /// @param _receiver The receiver of the assets.
  /// @param _owner The owner of the ybUSDB.
  function redeem(uint256 _shares, address _receiver, address _owner) public returns (uint256 _assets) {
    // Claim all pending yield
    claimAllYield();

    if (msg.sender != _owner) {
      // If msg.sender is not the owner, then check allowance
      uint256 _allowed = allowance[_owner][msg.sender];
      if (_allowed != type(uint256).max) {
        // If not unlimited allowance, then decrease allowance.
        // This should be reverted if the allowance is not enough.
        allowance[_owner][msg.sender] = _allowed - _shares;
      }
    }

    // Check for rounding error.
    if ((_assets = previewRedeem(_shares)) == 0) revert ZeroAssets();

    // Effect
    _burn(_owner, _shares);
    _totalAssets -= _assets;

    // Interaction
    // Transfer assets out
    asset.safeTransfer(_receiver, _assets);

    emit Withdraw(msg.sender, _receiver, _owner, _assets, _shares);
  }

  /// @notice Withdraw USDB by specifying the amount of assets that user wishes to receive.
  /// @dev This function follows ERC-4626 standard.
  /// @param _assets The amount of assets that user wishes to receive.
  /// @param _receiver The receiver of the assets.
  /// @param _owner The owner of the ybUSDB.
  function withdraw(uint256 _assets, address _receiver, address _owner) public returns (uint256 _shares) {
    // Claim all pending yield
    claimAllYield();

    _shares = previewWithdraw(_assets);

    if (msg.sender != _owner) {
      // If msg.sender is not the owner, then check allowance
      uint256 _allowed = allowance[_owner][msg.sender];
      if (_allowed != type(uint256).max) {
        // If not unlimited allowance, then decrease allowance.
        // This should be reverted if the allowance is not enough.
        allowance[_owner][msg.sender] = _allowed - _shares;
      }
    }

    // Effect
    _burn(_owner, _shares);
    _totalAssets -= _assets;

    // Interaction
    // Transfer assets out
    asset.safeTransfer(_receiver, _assets);

    emit Withdraw(msg.sender, _receiver, _owner, _assets, _shares);
  }

  /// @notice Return the total assets managed by this contract.
  /// @dev Unclaimed yield is included.
  function totalAssets() public view returns (uint256) {
    return _totalAssets + asset.getClaimableAmount(address(this));
  }

  /// @notice Preview the amount of ybUSDB to mint by specifying the amount of assets to deposit.
  /// @param _assets The amount of assets to deposit.
  function previewDeposit(uint256 _assets) public view returns (uint256 _shares) {
    return convertToShares(_assets);
  }

  /// @notice Preview the amount of assets to receive by specifying the amount of ybUSDB to redeem.
  /// @param _shares The amount of ybUSDB to redeem.
  function previewRedeem(uint256 _shares) public view returns (uint256 _assets) {
    return convertToAssets(_shares);
  }

  /// @notice Preview the amount of USDB needed to mint by specifying the amount of ybUSDB.
  /// @param _shares The amount of ybUSDB to mint.
  function previewMint(uint256 _shares) public view returns (uint256 _assets) {
    // SLOAD
    uint256 _totalSupply = totalSupply;
    return _totalSupply == 0 ? _shares : _shares.mulDivUp(totalAssets(), _totalSupply);
  }

  /// @notice Preview the amount of ybUSDB needed by specifying the amount of USDB wishes to receive.
  /// @param _assets The amount of USDB wishes to receive.
  function previewWithdraw(uint256 _assets) public view returns (uint256 _shares) {
    // SLOAD
    uint256 _totalSupply = totalSupply;
    return _totalSupply == 0 ? _assets : _assets.mulDivUp(_totalSupply, totalAssets());
  }

  /// @notice Convert the amount of assets to ybUSDB.
  /// @param _assets The amount of assets to convert.
  function convertToShares(uint256 _assets) public view returns (uint256 _shares) {
    // SLOAD
    uint256 _totalSupply = totalSupply;
    return _totalSupply == 0 ? _assets : _assets.mulDivDown(_totalSupply, totalAssets());
  }

  /// @notice Convert the amount of ybUSDB to assets.
  /// @param _shares The amount of ybUSDB to convert.
  function convertToAssets(uint256 _shares) public view returns (uint256 _assets) {
    // SLOAD
    uint256 _totalSupply = totalSupply;
    return _totalSupply == 0 ? _shares : _shares.mulDivDown(totalAssets(), _totalSupply);
  }

  /// @notice Return the amount of assets that can be deposited to ybUSDB.
  function maxDeposit(address) external pure returns (uint256) {
    return type(uint256).max;
  }

  /// @notice Return the amount of ybUSDB that can be minted.
  function maxMint(address) external pure returns (uint256) {
    return type(uint256).max;
  }

  /// @notice Return the amount of USDB that can be withdrawn from ybUSDB.
  /// @param _owner The owner of the ybUSDB.
  function maxWithdraw(address _owner) external view returns (uint256) {
    return convertToAssets(balanceOf[_owner]);
  }

  /// @notice Return the amount of ybUSDB that can be redeemed.
  /// @param _owner The owner of the ybUSDB.
  function maxRedeem(address _owner) external view returns (uint256) {
    return balanceOf[_owner];
  }

  function setDev(address _dev) external {
    require(msg.sender == dev, "FORBIDDEN");
    dev = _dev;
  }

  function setPointsOperator(address _pointsOperator) external {
    require(msg.sender == dev, "FORBIDDEN");
    blastPoints.configurePointsOperator(_pointsOperator);
  }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
    /*//////////////////////////////////////////////////////////////
                    SIMPLIFIED FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    uint256 internal constant MAX_UINT256 = 2**256 - 1;

    uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
    }

    function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
    }

    function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
    }

    /*//////////////////////////////////////////////////////////////
                    LOW LEVEL FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // Divide x * y by the denominator.
            z := div(mul(x, y), denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // If x * y modulo the denominator is strictly greater than 0,
            // 1 is added to round up the division of x * y by the denominator.
            z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator))
        }
    }

    function rpow(
        uint256 x,
        uint256 n,
        uint256 scalar
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            switch x
            case 0 {
                switch n
                case 0 {
                    // 0 ** 0 = 1
                    z := scalar
                }
                default {
                    // 0 ** n = 0
                    z := 0
                }
            }
            default {
                switch mod(n, 2)
                case 0 {
                    // If n is even, store scalar in z for now.
                    z := scalar
                }
                default {
                    // If n is odd, store x in z for now.
                    z := x
                }

                // Shifting right by 1 is like dividing by 2.
                let half := shr(1, scalar)

                for {
                    // Shift n right by 1 before looping to halve it.
                    n := shr(1, n)
                } n {
                    // Shift n right by 1 each iteration to halve it.
                    n := shr(1, n)
                } {
                    // Revert immediately if x ** 2 would overflow.
                    // Equivalent to iszero(eq(div(xx, x), x)) here.
                    if shr(128, x) {
                        revert(0, 0)
                    }

                    // Store x squared.
                    let xx := mul(x, x)

                    // Round to the nearest number.
                    let xxRound := add(xx, half)

                    // Revert if xx + half overflowed.
                    if lt(xxRound, xx) {
                        revert(0, 0)
                    }

                    // Set x to scaled xxRound.
                    x := div(xxRound, scalar)

                    // If n is even:
                    if mod(n, 2) {
                        // Compute z * x.
                        let zx := mul(z, x)

                        // If z * x overflowed:
                        if iszero(eq(div(zx, x), z)) {
                            // Revert if x is non-zero.
                            if iszero(iszero(x)) {
                                revert(0, 0)
                            }
                        }

                        // Round to the nearest number.
                        let zxRound := add(zx, half)

                        // Revert if zx + half overflowed.
                        if lt(zxRound, zx) {
                            revert(0, 0)
                        }

                        // Return properly scaled zxRound.
                        z := div(zxRound, scalar)
                    }
                }
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
                        GENERAL NUMBER UTILITIES
    //////////////////////////////////////////////////////////////*/

    function sqrt(uint256 x) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            let y := x // We start y at x, which will help us make our initial estimate.

            z := 181 // The "correct" value is 1, but this saves a multiplication later.

            // This segment is to get a reasonable initial estimate for the Babylonian method. With a bad
            // start, the correct # of bits increases ~linearly each iteration instead of ~quadratically.

            // We check y >= 2^(k + 8) but shift right by k bits
            // each branch to ensure that if x >= 256, then y >= 256.
            if iszero(lt(y, 0x10000000000000000000000000000000000)) {
                y := shr(128, y)
                z := shl(64, z)
            }
            if iszero(lt(y, 0x1000000000000000000)) {
                y := shr(64, y)
                z := shl(32, z)
            }
            if iszero(lt(y, 0x10000000000)) {
                y := shr(32, y)
                z := shl(16, z)
            }
            if iszero(lt(y, 0x1000000)) {
                y := shr(16, y)
                z := shl(8, z)
            }

            // Goal was to get z*z*y within a small factor of x. More iterations could
            // get y in a tighter range. Currently, we will have y in [256, 256*2^16).
            // We ensured y >= 256 so that the relative difference between y and y+1 is small.
            // That's not possible if x < 256 but we can just verify those cases exhaustively.

            // Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256.
            // Correctness can be checked exhaustively for x < 256, so we assume y >= 256.
            // Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps.

            // For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range
            // (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256.

            // Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate
            // sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18.

            // There is no overflow risk here since y < 2^136 after the first branch above.
            z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181.

            // Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough.
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))

            // If x+1 is a perfect square, the Babylonian method cycles between
            // floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor.
            // See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division
            // Since the ceil is rare, we save gas on the assignment and repeat division in the rare case.
            // If you don't care whether the floor or ceil square root is returned, you can remove this statement.
            z := sub(z, lt(div(x, z), z))
        }
    }

    function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Mod x by y. Note this will return
            // 0 instead of reverting if y is zero.
            z := mod(x, y)
        }
    }

    function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            // Divide x by y. Note this will return
            // 0 instead of reverting if y is zero.
            r := div(x, y)
        }
    }

    function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Add 1 to x * y if x % y > 0. Note this will
            // return 0 instead of reverting if y is zero.
            z := add(gt(mod(x, y), 0), div(x, y))
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "from" argument.
            mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

enum YieldMode {
  AUTOMATIC,
  VOID,
  CLAIMABLE
}

enum GasMode {
  VOID,
  CLAIMABLE
}

interface IBlast {
  function configureClaimableYield() external;
  function claimAllYield(address contractAddress, address receipientOfYield) external returns (uint256);
  function readClaimableYield(address contractAddress) external view returns (uint256);
  function configureGovernor(address governorAddress) external;
  function configureClaimableGas() external;
  function claimAllGas(address contractAddress, address receipientOfGas) external returns (uint256);
  function readGasParams(address contractAddress)
    external
    view
    returns (uint256 etherSeconds, uint256 etherBalance, uint256 lastUpdated, GasMode);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IBlastPoints {
  function configurePointsOperator(address operator) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import {ERC20} from "lib/solmate/src/tokens/ERC20.sol";

enum YieldMode {
  AUTOMATIC,
  VOID,
  CLAIMABLE
}

abstract contract IERC20Rebasing is ERC20 {
  function configure(YieldMode) external virtual returns (uint256);
  function claim(address recipient, uint256 amount) external virtual returns (uint256);
  function getClaimableAmount(address account) external view virtual returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import {ERC20} from "lib/solmate/src/tokens/ERC20.sol";
import {SafeTransferLib} from "lib/solmate/src/utils/SafeTransferLib.sol";

contract YieldInbox {
  using SafeTransferLib for ERC20;

  // Config
  address public immutable controller;

  constructor() {
    controller = msg.sender;
  }

  function crawlBack(ERC20 _token, address _to, uint256 _amount) external {
    require(msg.sender == controller, "!auth");
    _token.safeTransfer(_to, _amount);
  }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 255
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IBlastPoints","name":"_blastPoints","type":"address"},{"internalType":"address","name":"_blastPointsOperator","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ZeroAssets","type":"error"},{"inputs":[],"name":"ZeroShares","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"assets","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"assets","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"asset","outputs":[{"internalType":"contract IERC20Rebasing","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"blastPoints","outputs":[{"internalType":"contract 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ernalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_assets","type":"uint256"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"_shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"yieldInbox","outputs":[{"internalType":"contract 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000000000000000000000000430000000000000000000000000000000000000300000000000000000000000043000000000000000000000000000000000000020000000000000000000000002536fe9ab3f511540f2f9e2ec2a805005c3dd800000000000000000000000000c4d6713e4223b66708dd0167aacf756d2d314192

-----Decoded View---------------
Arg [0] : _usdb (address): 0x4300000000000000000000000000000000000003
Arg [1] : _blast (address): 0x4300000000000000000000000000000000000002
Arg [2] : _blastPoints (address): 0x2536FE9ab3F511540F2f9e2eC2A805005C3Dd800
Arg [3] : _blastPointsOperator (address): 0xC4D6713E4223B66708DD0167aAcf756D2D314192

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000004300000000000000000000000000000000000003
Arg [1] : 0000000000000000000000004300000000000000000000000000000000000002
Arg [2] : 0000000000000000000000002536fe9ab3f511540f2f9e2ec2a805005c3dd800
Arg [3] : 000000000000000000000000c4d6713e4223b66708dd0167aacf756d2d314192