ERC20VaultImplementation

{{
  "language": "Solidity",
  "sources": {
    "src/ERC20VaultImplementation.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./UpgradeableBaseVault.sol";
import "./IVaultInitializer.sol";

contract ERC20VaultImplementation is UpgradeableBaseVault, IVaultInitializer {
    using SafeERC20 for IERC20;

    bool private initialized;

    function initialize(
        VaultConfig calldata cfg,
        address _underlying,
        string calldata _name,
        string calldata _symbol,
        address _owner,
        address _principal,
        uint256 _initialAmount,
        address _creator
    ) external payable override {
        if (initialized) revert ALREADY_INITIALIZED();
        initialized = true;

        name = _name;
        symbol = _symbol;
        
        _status = _NOT_ENTERED;
        _paused = false;
        
        underlying = _underlying;
        isEtherPool = false;
        principal = _principal;
        poolCreator = _creator;
        depositFeeBps = cfg.depositFeeBps;
        withdrawalFeeBps = cfg.withdrawalFeeBps;
        projectFeeBps = cfg.projectFeeBps;
        reserveRatioBps = cfg.reserveRatioBps;
        lossCapBps = cfg.lossCapBps;
        maxDepositPercentageBps = cfg.maxDepositPercentageBps;
        bootstrapLock = cfg.bootstrapLock;
        discountTierCount = cfg.discountTierCount;
        
        for (uint8 i = 0; i < 4; i++) {
            discountDurations[i] = cfg.discountDurations[i];
            discountBps[i] = cfg.discountBps[i];
        }
        
        tvlFirstElbow = cfg.tvlFirstElbow;
        tvlSecondElbow = cfg.tvlSecondElbow;
        slope1Bps = cfg.slope1Bps;
        maxFeeBps = cfg.maxFeeBps;
        withdrawCooldown = cfg.withdrawCooldown;
        maxWithdrawPenaltyBps = cfg.maxWithdrawPenaltyBps;
        fastExitWindow = cfg.fastExitWindow;
        fastExitFloorBps = cfg.fastExitFloorBps;
        
        vaultStart = block.timestamp;
        depositsStopped = false;
        
        _transferOwnership(_owner);
        seeder = _owner;

        // Bootstrap with initial amount - mint shares based on actual assets
        uint256 initialAssets = _totalAssets();
        if (initialAssets > 0) {
            _mint(_owner, initialAssets);
            lastExchangeRate = SCALE;
        }
    }

    function deposit(uint256 amount, address receiver, uint256 minShares)
        external
        payable
        nonReentrant
        whenNotPaused
        whenDepositsAllowed
        override
    {
        if (receiver != msg.sender) revert TRANSFERS_DISABLED();
        if (msg.value != 0) revert UNEXPECTED_ETH();
        if (amount == 0) revert ZERO_AMOUNT();
        
        uint256 before = IERC20(underlying).balanceOf(address(this));
        IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
        uint256 afterBal = IERC20(underlying).balanceOf(address(this));
        uint256 received = afterBal - before;

        // Allow first deposit even if cap is configured
        if (maxDepositPercentageBps > 0 && before > 0) {
            if (received > (before * maxDepositPercentageBps) / BPS) {
                revert EXCEEDS_MAX_DEPOSIT();
            }
        }

        uint16 effFeeBps = _feeBpsAtTVL(afterBal);           // ✅ after-deposit TVL
        uint256 net = received - (received * effFeeBps) / BPS;

        uint256 shares = totalSupply() == 0 ? net : (net * totalSupply()) / before;

        if (shares < minShares) revert SLIPPAGE_EXCEEDED();
        _mint(receiver, shares);
        lastDepositTimestamp[receiver] = block.timestamp;
        _updateExchangeRate();
    }

    function withdraw(uint256 shares, address receiver) external override nonReentrant whenNotPaused {
        if (msg.sender == seeder && block.timestamp < vaultStart + bootstrapLock) {
            revert SEEDER_LOCKED();
        }
        if (shares == 0) revert ZERO_SHARES();
        if (receiver == address(0)) revert("ERC20: transfer to the zero address");
        
        uint256 assetsBefore = _totalAssets();
        uint256 gross = shares * assetsBefore / totalSupply();
        uint256 fee = gross * withdrawalFeeBps / BPS;
        uint256 proj = gross * projectFeeBps / BPS;
        
        // Use new effective penalty calculation
        VaultConfig memory cfg = VaultConfig({
            depositFeeBps: depositFeeBps,
            withdrawalFeeBps: withdrawalFeeBps,
            projectFeeBps: projectFeeBps,
            reserveRatioBps: reserveRatioBps,
            lossCapBps: lossCapBps,
            maxDepositPercentageBps: maxDepositPercentageBps,
            bootstrapLock: bootstrapLock,
            discountTierCount: discountTierCount,
            discountDurations: discountDurations,
            discountBps: discountBps,
            tvlFirstElbow: tvlFirstElbow,
            tvlSecondElbow: tvlSecondElbow,
            slope1Bps: slope1Bps,
            maxFeeBps: maxFeeBps,
            withdrawCooldown: withdrawCooldown,
            maxWithdrawPenaltyBps: maxWithdrawPenaltyBps,
            fastExitWindow: fastExitWindow,
            fastExitFloorBps: fastExitFloorBps
        });
        uint256 penaltyBps = _effectivePenaltyBps(cfg, msg.sender);
        uint256 penaltyAmount = gross * penaltyBps / BPS;
        uint256 net = gross - fee - proj - penaltyAmount;
        uint256 afterAssets = assetsBefore - net - proj;

        if (afterAssets * BPS < reserveRatioBps * assetsBefore) revert RESERVE_TOO_LOW();

        _burn(msg.sender, shares);
        _send(receiver, net);
        if (proj > 0) {
            uint256 creatorShare = proj / 2;
            uint256 projectShare = proj - creatorShare; // Handles odd amounts
            
            // Send to project address first (more trusted)
            _send(PROJECT_FEE_ADDRESS, projectShare);
            
            // Send to creator second (potentially untrusted)
            // This already uses nonReentrant modifier, but be extra careful
            _send(poolCreator, creatorShare);
        }
        _updateExchangeRate();
    }
}"
    },
    "src/UpgradeableBaseVault.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
import "lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
import "./VaultConfig.sol";
import "./Errors.sol";

/**
 * @title UpgradeableBaseVault
 * @dev Base vault implementation for EIP-1167 proxy pattern
 * This implements ERC20 functionality manually to allow initialization after deployment
 */
abstract contract UpgradeableBaseVault {
    using SafeERC20 for IERC20;

    // ERC20 Storage
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string public name;
    string public symbol;
    uint8 public constant decimals = 18;

    // Ownable Storage
    address private _owner;
    
    // Seeder tracking for bootstrap lock
    address public seeder;

    // ReentrancyGuard Storage
    uint256 internal constant _NOT_ENTERED = 1;
    uint256 internal constant _ENTERED = 2;
    uint256 internal _status;

    // Pausable Storage
    bool internal _paused;

    // Vault specific storage
    address public constant PROJECT_FEE_ADDRESS = 0xB88276aB75113Eb8191B0e0A5D48f36B05AE6eD4;
    
    address public underlying;
    address public principal;
    address public poolCreator;
    bool public isEtherPool;
    bool public depositsStopped;

    uint16 public depositFeeBps;
    uint16 public withdrawalFeeBps;
    uint16 public projectFeeBps;
    uint16 public reserveRatioBps;
    uint16 public lossCapBps;
    uint16 public maxDepositPercentageBps;
    uint32 public bootstrapLock;
    uint8 public discountTierCount;

    uint32[4] public discountDurations;
    uint16[4] public discountBps;

    uint256 public tvlFirstElbow;
    uint256 public tvlSecondElbow;
    uint16 public slope1Bps;
    uint16 public maxFeeBps;
    uint32 public withdrawCooldown;
    uint16 public maxWithdrawPenaltyBps;
    uint32 public fastExitWindow;
    uint16 public fastExitFloorBps;

    uint256 public vaultStart;
    uint256 public lastExchangeRate;

    mapping(address => uint256) public lastDepositTimestamp;

    // Events
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event Paused(address account);
    event Unpaused(address account);
    event Donated(address indexed caller, uint256 amount);
    event DepositsStopped(address indexed principal);
    event DepositsResumed(address indexed principal);
    event PoolUnpaused(address indexed principal);

    // Modifiers
    modifier onlyOwner() {
        if (owner() != msg.sender) revert NOT_OWNER();
        _;
    }

    modifier nonReentrant() {
        if (_status == _ENTERED) revert REENTRANT_CALL();
        _status = _ENTERED;
        _;
        _status = _NOT_ENTERED;
    }

    modifier whenNotPaused() {
        if (paused()) revert PAUSED();
        _;
    }

    modifier whenPaused() {
        if (!paused()) revert NOT_PAUSED();
        _;
    }

    modifier onlyPrincipal() {
        if (msg.sender != principal) revert NOT_PRINCIPAL();
        _;
    }

    modifier whenDepositsAllowed() {
        if (depositsStopped) revert DEPOSITS_STOPPED();
        _;
    }

    // ERC20 Functions
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    function transfer(address to, uint256 amount) public returns (bool) {
        address tokenOwner = msg.sender;
        _transfer(tokenOwner, to, amount);
        return true;
    }

    function allowance(address tokenOwner, address spender) public view returns (uint256) {
        return _allowances[tokenOwner][spender];
    }

    function approve(address spender, uint256 amount) public returns (bool) {
        address tokenOwner = msg.sender;
        _approve(tokenOwner, spender, amount);
        return true;
    }

    function transferFrom(address from, address to, uint256 amount) public returns (bool) {
        address spender = msg.sender;
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    // Ownable Functions
    function owner() public view returns (address) {
        return _owner;
    }

    function renounceOwnership() public onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public onlyOwner {
        if (newOwner == address(0)) revert ZERO_ADDRESS_OWNER();
        _transferOwnership(newOwner);
    }

    // Pausable Functions
    function paused() public view returns (bool) {
        return _paused;
    }

    // Internal functions
    function _transfer(address from, address to, uint256 amount) internal {
        if (from == address(0)) revert ZERO_ADDRESS_FROM();
        if (to == address(0)) revert ZERO_ADDRESS_TO();
        
        // Custom restriction: no transfers except mint/burn
        if (!(from == address(0) || to == address(0))) revert TRANSFERS_DISABLED();

        uint256 fromBalance = _balances[from];
        if (fromBalance < amount) revert INSUFFICIENT_BALANCE();
        unchecked {
            _balances[from] = fromBalance - amount;
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);
    }

    function _mint(address account, uint256 amount) internal {
        if (account == address(0)) revert ZERO_ADDRESS_MINT();

        _totalSupply += amount;
        unchecked {
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal {
        if (account == address(0)) revert ZERO_ADDRESS_BURN();

        uint256 accountBalance = _balances[account];
        if (accountBalance < amount) revert BURN_EXCEEDS_BALANCE();
        unchecked {
            _balances[account] = accountBalance - amount;
            _totalSupply -= amount;
        }

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

    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        if (tokenOwner == address(0)) revert ZERO_ADDRESS_APPROVE_FROM();
        if (spender == address(0)) revert ZERO_ADDRESS_APPROVE_TO();

        _allowances[tokenOwner][spender] = amount;
        emit Approval(tokenOwner, spender, amount);
    }

    function _spendAllowance(address tokenOwner, address spender, uint256 amount) internal {
        uint256 currentAllowance = allowance(tokenOwner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < amount) revert INSUFFICIENT_ALLOWANCE();
            unchecked {
                _approve(tokenOwner, spender, currentAllowance - amount);
            }
        }
    }

    function _transferOwnership(address newOwner) internal {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    function _pause() internal whenNotPaused {
        _paused = true;
        emit Paused(msg.sender);
    }

    function _unpause() internal whenPaused {
        _paused = false;
        emit Unpaused(msg.sender);
    }

    // Vault specific functions
    function _totalAssets() internal view returns (uint256) {
        return isEtherPool ? address(this).balance : IERC20(underlying).balanceOf(address(this));
    }

    function _send(address to, uint256 amount) internal {
        if (isEtherPool) {
            (bool ok,) = to.call{value: amount}("");
            if (!ok) revert ETH_TRANSFER_FAIL();
        } else {
            IERC20(underlying).safeTransfer(to, amount);
        }
    }

    function _updateExchangeRate() internal {
        uint256 supply = totalSupply();
        if (supply == 0) {
            // No LPs → nothing to protect; let next deposit establish a fresh baseline.
            lastExchangeRate = 0;
            return;
        }

        uint256 newRate = (_totalAssets() * SCALE) / supply;
        // Enforce loss cap only when LPs exist
        if (
            lastExchangeRate > 0 &&
            newRate < lastExchangeRate &&
            ((lastExchangeRate - newRate) * BPS) / lastExchangeRate >= lossCapBps
        ) {
            _pause();
        }
        lastExchangeRate = newRate;
    }

    function _currentDiscountBps() internal view returns (uint16) {
        uint256 elapsed = block.timestamp - vaultStart;
        for (uint8 i = 0; i < discountTierCount; i++) {
            if (elapsed <= discountDurations[i]) return discountBps[i];
        }
        return 0;
    }

    function _feeBpsAtTVL(uint256 tvl) internal view returns (uint16) {
        uint16 disc = _currentDiscountBps();
        uint16 baseAfter = depositFeeBps > disc ? depositFeeBps - disc : 0;
        return _calculateDynamicFee(tvl, baseAfter);
    }

    function _effectiveDepositFeeBps() internal view returns (uint16) {
        uint256 currentTVL = _totalAssets();
        return _feeBpsAtTVL(currentTVL);
    }

    function _calculateDynamicFee(uint256 tvl, uint16 baseFee) internal view returns (uint16) {
        if (tvl < tvlFirstElbow) {
            return baseFee;
        }

        if (tvl < tvlSecondElbow) {
            uint256 tvlProgress = tvl - tvlFirstElbow;
            uint256 tvlRange = tvlSecondElbow - tvlFirstElbow;
            uint256 additionalFee = (slope1Bps * tvlProgress) / tvlRange;

            uint256 totalFee = baseFee + additionalFee;
            return totalFee > maxFeeBps ? maxFeeBps : uint16(totalFee);
        }

        uint256 cappedFee = baseFee + slope1Bps;
        return cappedFee > maxFeeBps ? maxFeeBps : uint16(cappedFee);
    }

    // Withdrawal penalty helper functions
    function _linearPenaltyBps(VaultConfig memory c, uint256 t) internal pure returns (uint256) {
        if (t >= c.withdrawCooldown || c.withdrawCooldown == 0) return 0;
        return uint256(c.maxWithdrawPenaltyBps) * (c.withdrawCooldown - t) / c.withdrawCooldown;
    }

    function _fastExitFloorBps(VaultConfig memory c, uint256 t) internal pure returns (uint256) {
        return (t < c.fastExitWindow) ? c.fastExitFloorBps : 0;
    }

    function _effectivePenaltyBps(VaultConfig memory c, address user) internal view returns (uint256) {
        uint256 t = block.timestamp - lastDepositTimestamp[user];
        uint256 linear = _linearPenaltyBps(c, t);
        uint256 floor  = _fastExitFloorBps(c, t);
        return linear > floor ? linear : floor;  // pick the harsher, not both
    }

    function previewDepositFee(uint256 depositAmount) external view returns (uint256 feeAmount, uint16 feeBps) {
        uint256 tvlAfter = _totalAssets() + depositAmount;
        feeBps = _feeBpsAtTVL(tvlAfter);
        feeAmount = (depositAmount * feeBps) / BPS;
    }

    function getCurrentFeeTier()
        external
        view
        returns (
            string memory tierName,
            uint256 currentTVL,
            uint16 currentFeeBps,
            uint256 nextTierThreshold,
            uint16 nextTierFeeBps
        )
    {
        currentTVL = _totalAssets();

        // What the depositor actually pays *today* (includes discount, dynamic elbow logic)
        currentFeeBps = _effectiveDepositFeeBps();

        // Derive baseAfter (depositFee minus current discount) to preview next tier consistently
        uint16 disc = _currentDiscountBps();
        uint16 baseAfter = depositFeeBps > disc ? depositFeeBps - disc : 0;

        if (currentTVL < tvlFirstElbow) {
            tierName = "Tier A (Early Stage)";
            nextTierThreshold = tvlFirstElbow;
            nextTierFeeBps = _calculateDynamicFee(nextTierThreshold, baseAfter);
        } else if (currentTVL < tvlSecondElbow) {
            tierName = "Tier B (Growth Stage)";
            nextTierThreshold = tvlSecondElbow;
            nextTierFeeBps = _calculateDynamicFee(nextTierThreshold, baseAfter);
        } else {
            tierName = "Tier C (Mature Stage)";
            nextTierThreshold = type(uint256).max;
            nextTierFeeBps = _calculateDynamicFee(nextTierThreshold, baseAfter);
        }
    }

    // Public functions
    function donate(uint256 amount) external payable nonReentrant whenDepositsAllowed {
        if (isEtherPool) {
            if (!(msg.value == amount && amount > 0)) revert BAD_ETH_AMT();
        } else {
            if (amount == 0) revert BAD_TOKEN_AMT();
            IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
        }
        _updateExchangeRate();
        emit Donated(msg.sender, amount);
    }

    function stopPool() external onlyPrincipal {
        if (depositsStopped) revert ALREADY_STOPPED();
        depositsStopped = true;
        emit DepositsStopped(principal);
    }

    function resumePool() external onlyPrincipal {
        if (!depositsStopped) revert NOT_STOPPED();
        depositsStopped = false;
        emit DepositsResumed(principal);
    }

    function unpause() external onlyPrincipal {
        _unpause();
        emit PoolUnpaused(principal);
    }

    function deposit(uint256 amount, address receiver, uint256 minShares) external payable virtual;
    function withdraw(uint256 shares, address receiver) external virtual;
}"
    },
    "src/IVaultInitializer.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./VaultConfig.sol";

interface IVaultInitializer {
    function initialize(
        VaultConfig calldata cfg,
        address underlying,
        string calldata name,
        string calldata symbol,
        address owner,
        address principal,
        uint256 initialAmount,
        address creator
    ) external payable;
}"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}
"
    },
    "src/VaultConfig.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

uint256 constant BPS = 10_000;
uint256 constant SCALE = 1e18;

struct VaultConfig {
    uint16 depositFeeBps;
    uint16 withdrawalFeeBps;
    uint16 projectFeeBps;
    uint16 reserveRatioBps;
    uint16 lossCapBps;
    uint16 maxDepositPercentageBps;
    uint32 bootstrapLock;
    uint8 discountTierCount;
    uint32[4] discountDurations;
    uint16[4] discountBps;
    uint256 tvlFirstElbow;
    uint256 tvlSecondElbow;
    uint16 slope1Bps;
    uint16 maxFeeBps;
    uint32 withdrawCooldown;
    uint16 maxWithdrawPenaltyBps;
    uint32 fastExitWindow;
    uint16 fastExitFloorBps;
}"
    },
    "src/Errors.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// Common custom errors for gas savings
error NOT_PRINCIPAL();
error DEPOSITS_STOPPED();
error ZERO_PRINCIPAL();
error ETH_TRANSFER_FAIL();
error BAD_ETH_AMT();
error BAD_TOKEN_AMT();
error ALREADY_STOPPED();
error NOT_STOPPED();
error TRANSFERS_DISABLED();
error UNEXPECTED_ETH();
error ZERO_AMOUNT();
error EXCEEDS_MAX_DEPOSIT();
error SLIPPAGE_EXCEEDED();
error ZERO_SHARES();
error RESERVE_TOO_LOW();
error INIT_ZERO();
error ZERO_TOKEN();
error INVALID_POOL_COUNT();
error PROTOCOL_FEE_TOO_LOW();
error PROTOCOL_FEE_TOO_HIGH();
error TRADING_FEE_TOO_LOW();
error TRADING_FEE_TOO_HIGH();
error INVALID_POOL();
error POOL_NOT_ETH();
error POOL_TOKEN_MISMATCH();
error MUST_SUM_TO_10000();
error STRATEGY_INACTIVE();
error SLIPPAGE_TOO_HIGH();
error BAD_MINSHARES_LEN();
error POOL_DEPOSITS_STOPPED();
error POOL_PAUSED();
error NO_POSITION();
error INVALID_PERCENTAGE();
error NO_TOKENS_RECEIVED();
error NO_TOKENS_RECEIVED_FOR_SWAP();
error ETH_FEE_TRANSFER_FAILED();
error ETH_TRANSFER_FAILED();
error MAX_FEE_TOO_HIGH();
error SLOPE_TOO_STEEP();
error INV_DEP_FEE();
error INV_WD_FEE();
error INV_PROJ_FEE();
error INV_RES_RATIO();
error INV_LOSS_CAP();
error INV_MAX_DEP_PCT();
error INV_COOLDOWN();
error INV_PENALTY();
error INV_FAST_EXIT_WINDOW();
error INV_FAST_EXIT_FLOOR();
error INV_TIER_CNT();
error INV_DUR_0();
error INV_DUR_SEQ();
error INV_DISC_BPS();
error INV_TVL_ELBOW_1();
error INV_TVL_ELBOW_2();
error INV_MAX_FEE();
error ZERO_ETH_AMOUNT();
error SEEDER_LOCKED();
error STRATEGY_FEE_TOO_LOW();

// Additional errors for require statement replacements
error ALREADY_INITIALIZED();
error FACTORY_ALREADY_SET();
error FACTORY_ZERO_ADDRESS();
error INVALID_ETHER_VAULT_IMPL();
error INVALID_ERC20_VAULT_IMPL();
error CLONE_FAILED();
error CLONE2_FAILED();
error NOT_OWNER();
error REENTRANT_CALL();
error PAUSED();
error NOT_PAUSED();
error ZERO_ADDRESS_OWNER();
error ZERO_ADDRESS_FROM();
error ZERO_ADDRESS_TO();
error INSUFFICIENT_BALANCE();
error ZERO_ADDRESS_MINT();
error ZERO_ADDRESS_BURN();
error BURN_EXCEEDS_BALANCE();
error ZERO_ADDRESS_APPROVE_FROM();
error ZERO_ADDRESS_APPROVE_TO();
error INSUFFICIENT_ALLOWANCE();
error TICK_OUT_OF_RANGE();
error ZERO_DENOMINATOR();
error MATH_OVERFLOW();
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Permit.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}
"
    },
    "lib/openzeppelin-contracts/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
"
    }
  },
  "settings": {
    "remappings": [
      "ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/",
      "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
      "forge-std/=lib/forge-std/src/",
      "openzeppelin-contracts/=lib/openzeppelin-contracts/",
      "openzeppelin/=lib/openzeppelin-contracts/contracts/",
      "v3-core/=lib/v3-core/",
      "v3-periphery/=lib/v3-periphery/contracts/"
    ],
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "metadata": {
      "useLiteralContent": false,
      "bytecodeHash": "ipfs",
      "appendCBOR": true
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "evmVersion": "cancun",
    "viaIR": true
  }
}}