previousOwner

newOwner

OwnershipTransferred

owner

renounceOwnership

transferOwnership

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}


Ownable

name_

symbol_

spender

value

Approval

from

Transfer

allowance

amount

approve

account

balanceOf

decimals

subtractedValue

decreaseAllowance

addedValue

increaseAllowance

name

symbol

totalSupply

transfer

transferFrom

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

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

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

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

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}


ERC20

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}


IERC20Metadata

// 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);
}


IERC20

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}


Context

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;

import "./interfaces/IiZiSwapPool.sol";
import "./interfaces/IiZiSwapFlashCallback.sol";
import "./interfaces/IiZiSwapCallback.sol";

import "./libraries/Liquidity.sol";
import "./libraries/Point.sol";
import "./libraries/PointBitmap.sol";
import "./libraries/LogPowMath.sol";
import "./libraries/MulDivMath.sol";
import "./libraries/TwoPower.sol";
import "./libraries/LimitOrder.sol";
import "./libraries/SwapMathY2X.sol";
import "./libraries/SwapMathX2Y.sol";
import "./libraries/SwapMathY2XDesire.sol";
import "./libraries/SwapMathX2YDesire.sol";
import "./libraries/TokenTransfer.sol";
import "./libraries/UserEarn.sol";
import "./libraries/State.sol";
import "./libraries/Oracle.sol";
import "./libraries/OrderOrEndpoint.sol";
import "./libraries/MaxMinMath.sol";

contract FlashModule {

    using Liquidity for mapping(bytes32 =>Liquidity.Data);
    using Liquidity for Liquidity.Data;
    using Point for mapping(int24 =>Point.Data);
    using Point for Point.Data;
    using PointBitmap for mapping(int16 =>uint256);
    using LimitOrder for LimitOrder.Data;
    using UserEarn for UserEarn.Data;
    using UserEarn for mapping(bytes32 =>UserEarn.Data);
    using SwapMathY2X for SwapMathY2X.RangeRetState;
    using SwapMathX2Y for SwapMathX2Y.RangeRetState;
    using Oracle for Oracle.Observation[65535];
    using OrderOrEndpoint for mapping(int24 =>int24);

    int24 internal constant LEFT_MOST_PT = -800000;
    int24 internal constant RIGHT_MOST_PT = 800000;

    /// @notice left most point regularized by pointDelta
    int24 public leftMostPt;
    /// @notice right most point regularized by pointDelta
    int24 public rightMostPt;
    /// @notice maximum liquidSum for each point, see points() in IiZiSwapPool or library Point
    uint128 public maxLiquidPt;

    /// @notice address of iZiSwapFactory
    address public factory;

    /// @notice address of tokenX
    address public tokenX;
    /// @notice address of tokenY
    address public tokenY;
    /// @notice fee amount of this swap pool, 3000 means 0.3%
    uint24 public fee;

    /// @notice minimum number of distance between initialized or limitorder points 
    int24 public pointDelta;

    /// @notice The fee growth as a 128-bit fixpoing fees of tokenX collected per 1 liquidity of the pool
    uint256 public feeScaleX_128;
    /// @notice The fee growth as a 128-bit fixpoing fees of tokenY collected per 1 liquidity of the pool
    uint256 public feeScaleY_128;

    uint160 sqrtRate_96;

    /// @notice some values of pool
    /// see library State or IiZiSwapPool#state for more infomation
    State public state;

    /// @notice the information about a liquidity by the liquidity's key
    mapping(bytes32 =>Liquidity.Data) public liquidities;

    /// @notice 256 packed point (orderOrEndpoint>0) boolean values. See PointBitmap for more information
    mapping(int16 =>uint256) public pointBitmap;

    /// @notice returns infomation of a point in the pool, see Point library of IiZiSwapPool#poitns for more information
    mapping(int24 =>Point.Data) public points;
    /// @notice infomation about a point whether has limit order and whether as an liquidity's endpoint
    mapping(int24 =>int24) public orderOrEndpoint;
    /// @notice limitOrder info on a given point
    mapping(int24 =>LimitOrder.Data) public limitOrderData;
    /// @notice information about a user's limit order (sell tokenY and earn tokenX)
    mapping(bytes32 => UserEarn.Data) public userEarnX;
    /// @notice information about a user's limit order (sell tokenX and earn tokenY)
    mapping(bytes32 => UserEarn.Data) public userEarnY;
    /// @notice observation data array
    Oracle.Observation[65535] public observations;

    uint256 public totalFeeXCharged;
    uint256 public totalFeeYCharged;

    address private original;

    address private swapModuleX2Y;
    address private swapModuleY2X;
    address private liquidityModule;
    address private limitOrderModule;
    address private flashModule;

    /// @notice percent to charge from miner's fee
    uint24 public feeChargePercent;

    function balanceX() private view returns (uint256) {
        (bool success, bytes memory data) =
            tokenX.staticcall(abi.encodeWithSelector(IERC20Minimal.balanceOf.selector, address(this)));
        require(success && data.length >= 32);
        return abi.decode(data, (uint256));
    }

    function balanceY() private view returns (uint256) {
        (bool success, bytes memory data) =
            tokenY.staticcall(abi.encodeWithSelector(IERC20Minimal.balanceOf.selector, address(this)));
        require(success && data.length >= 32);
        return abi.decode(data, (uint256));
    }


    /// Delegate call implementation for IiZiSwapPool#flash.
    function flash(
        address recipient,
        uint256 amountX,
        uint256 amountY,
        bytes calldata data
    ) external returns (uint256 actualAmountX, uint256 actualAmountY, uint256 paidX, uint256 paidY) {
        uint128 currentLiquidity = state.liquidity;
        require(currentLiquidity > 0, 'L');

        // even the balance if not enough, the full fees are required to pay
        uint256 feeX = MulDivMath.mulDivCeil(amountX, fee, 1e6);
        uint256 feeY = MulDivMath.mulDivCeil(amountY, fee, 1e6);
        uint256 balanceXBefore = balanceX();
        uint256 balanceYBefore = balanceY();

        actualAmountX = MaxMinMath.min256(amountX, balanceXBefore);
        actualAmountY = MaxMinMath.min256(amountY, balanceYBefore);

        if (actualAmountX > 0) TokenTransfer.transferToken(tokenX, recipient, actualAmountX);
        if (actualAmountY > 0) TokenTransfer.transferToken(tokenY, recipient, actualAmountY);

        IiZiSwapFlashCallback(msg.sender).flashCallback(feeX, feeY, data);
        uint256 balanceXAfter = balanceX();
        uint256 balanceYAfter = balanceY();

        require(balanceXBefore + feeX <= balanceXAfter, 'FX');
        require(balanceYBefore + feeY <= balanceYAfter, 'FY');

        paidX = balanceXAfter - balanceXBefore;
        paidY = balanceYAfter - balanceYBefore;

        if (paidX > 0) {
            uint256 chargedFeeAmount = paidX * feeChargePercent / 100;
            totalFeeXCharged += chargedFeeAmount;
            feeScaleX_128 = feeScaleX_128 + MulDivMath.mulDivFloor(paidX - chargedFeeAmount, TwoPower.Pow128, currentLiquidity);
        }
        if (paidY > 0) {
            uint256 chargedFeeAmount = paidY * feeChargePercent / 100;
            totalFeeYCharged += chargedFeeAmount;
            feeScaleY_128 = feeScaleY_128 + MulDivMath.mulDivFloor(paidY - chargedFeeAmount, TwoPower.Pow128, currentLiquidity);
        }

    }
}

recipient

sender

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.4;

/// @title Minimal ERC20 interface for Uniswap
/// @notice Contains a subset of the full ERC20 interface that is used in Uniswap V3
interface IERC20Minimal {
    /// @notice Returns the balance of a token
    /// @param account The account for which to look up the number of tokens it has, i.e. its balance
    /// @return The number of tokens held by the account
    function balanceOf(address account) external view returns (uint256);

    /// @notice Transfers the amount of token from the `msg.sender` to the recipient
    /// @param recipient The account that will receive the amount transferred
    /// @param amount The number of tokens to send from the sender to the recipient
    /// @return Returns true for a successful transfer, false for an unsuccessful transfer
    function transfer(address recipient, uint256 amount) external returns (bool);

    /// @notice Returns the current allowance given to a spender by an owner
    /// @param owner The account of the token owner
    /// @param spender The account of the token spender
    /// @return The current allowance granted by `owner` to `spender`
    function allowance(address owner, address spender) external view returns (uint256);

    /// @notice Sets the allowance of a spender from the `msg.sender` to the value `amount`
    /// @param spender The account which will be allowed to spend a given amount of the owners tokens
    /// @param amount The amount of tokens allowed to be used by `spender`
    /// @return Returns true for a successful approval, false for unsuccessful
    function approve(address spender, uint256 amount) external returns (bool);

    /// @notice Transfers `amount` tokens from `sender` to `recipient` up to the allowance given to the `msg.sender`
    /// @param sender The account from which the transfer will be initiated
    /// @param recipient The recipient of the transfer
    /// @param amount The amount of the transfer
    /// @return Returns true for a successful transfer, false for unsuccessful
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /// @notice Event emitted when tokens are transferred from one address to another, either via `#transfer` or `#transferFrom`.
    /// @param from The account from which the tokens were sent, i.e. the balance decreased
    /// @param to The account to which the tokens were sent, i.e. the balance increased
    /// @param value The amount of tokens that were transferred
    event Transfer(address indexed from, address indexed to, uint256 value);

    /// @notice Event emitted when the approval amount for the spender of a given owner's tokens changes.
    /// @param owner The account that approved spending of its tokens
    /// @param spender The account for which the spending allowance was modified
    /// @param value The new allowance from the owner to the spender
    event Approval(address indexed owner, address indexed spender, uint256 value);
    
}


IERC20Minimal

data

swapX2YCallback

swapY2XCallback

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;

interface IiZiSwapMintCallback {

    /// @notice Called to msg.sender in iZiSwapPool#mint call
    /// @param x Amount of tokenX need to pay from miner
    /// @param y Amount of tokenY need to pay from miner
    /// @param data Any data passed through by the msg.sender via the iZiSwapPool#mint call
    function mintDepositCallback(
        uint256 x,
        uint256 y,
        bytes calldata data
    ) external;

}

interface IiZiSwapCallback {

    /// @notice Called to msg.sender in iZiSwapPool#swapY2X(DesireX) call
    /// @param x Amount of tokenX trader will acquire
    /// @param y Amount of tokenY trader will pay
    /// @param data Any dadta passed though by the msg.sender via the iZiSwapPool#swapY2X(DesireX) call
    function swapY2XCallback(
        uint256 x,
        uint256 y,
        bytes calldata data
    ) external;

    /// @notice Called to msg.sender in iZiSwapPool#swapX2Y(DesireY) call
    /// @param x Amount of tokenX trader will pay
    /// @param y Amount of tokenY trader will require
    /// @param data Any dadta passed though by the msg.sender via the iZiSwapPool#swapX2Y(DesireY) call
    function swapX2YCallback(
        uint256 x,
        uint256 y,
        bytes calldata data
    ) external;

}

interface IiZiSwapAddLimOrderCallback {

    /// @notice Called to msg.sender in iZiSwapPool#addLimOrderWithX(Y) call
    /// @param x Amount of tokenX seller will pay
    /// @param y Amount of tokenY seller will pay
    /// @param data Any dadta passed though by the msg.sender via the iZiSwapPool#addLimOrderWithX(Y) call
    function payCallback(
        uint256 x,
        uint256 y,
        bytes calldata data
    ) external;

}

IiZiSwapCallback

tokenX

tokenY

pointDelta

pool

NewPool

chargeReceiver

defaultFeeChargePercent

deployPoolParams

currentPoint

feeChargePercent

enableFeeAmount

fee2pointDelta

flashModule

limitOrderModule

liquidityModule

_chargeReceiver

modifyChargeReceiver

_defaultFeeChargePercent

modifyDefaultFeeChargePercent

newPool

swapX2YModule

swapY2XModule

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;

interface IiZiSwapFactory {

    /// @notice emit when successfuly create a new pool (calling iZiSwapFactory#newPool)
    /// @param tokenX address of erc-20 tokenX
    /// @param tokenY address of erc-20 tokenY
    /// @param fee fee amount of swap (3000 means 0.3%)
    /// @param pointDelta minimum number of distance between initialized or limitorder points
    /// @param pool address of swap pool
    event NewPool(
        address indexed tokenX,
        address indexed tokenY,
        uint24 indexed fee,
        uint24 pointDelta,
        address pool
    );

    /// @notice module to support swap from tokenX to tokenY
    /// @return swapX2YModule address
    function swapX2YModule() external returns (address);

    /// @notice module to support swap from tokenY to tokenX
    /// @return swapY2XModule address
    function swapY2XModule() external returns (address);

    /// @notice module to support mint/burn/collect function of pool
    /// @return liquidityModule address
    function liquidityModule() external returns (address);

    /// @notice address of module for user to manage limit orders
    /// @return limitOrderModule address
    function limitOrderModule() external returns (address);

    /// @notice address of module for flash loan
    /// @return flashModule address
    function flashModule() external returns (address);

    /// @notice default fee rate from miner's fee gain
    /// @return defaultFeeChargePercent default fee rate * 100
    function defaultFeeChargePercent() external returns (uint24);

    /// @notice Enables a fee amount with the given pointDelta
    /// @dev Fee amounts may never be removed once enabled
    /// @param fee fee amount (3000 means 0.3%)
    /// @param pointDelta The spacing between points to be enforced for all pools created with the given fee amount
    function enableFeeAmount(uint24 fee, uint24 pointDelta) external;

    /// @notice Create a new pool which not exists.
    /// @param tokenX address of tokenX
    /// @param tokenY address of tokenY
    /// @param fee fee amount
    /// @param currentPoint initial point (log 1.0001 of price)
    /// @return address of newly created pool
    function newPool(
        address tokenX,
        address tokenY,
        uint24 fee,
        int24 currentPoint
    ) external returns (address);

    /// @notice Charge receiver of all pools.
    /// @return address of charge receiver
    function chargeReceiver() external view returns(address);

    /// @notice Get pool of (tokenX, tokenY, fee), address(0) for not exists.
    /// @param tokenX address of tokenX
    /// @param tokenY address of tokenY
    /// @param fee fee amount
    /// @return address of pool
    function pool(
        address tokenX,
        address tokenY,
        uint24 fee
    ) external view returns(address);

    /// @notice Get point delta of a given fee amount.
    /// @param fee fee amount
    /// @return pointDelta the point delta
    function fee2pointDelta(uint24 fee) external view returns (int24 pointDelta);

    /// @notice Change charge receiver, only owner of factory can call.
    /// @param _chargeReceiver address of new receiver
    function modifyChargeReceiver(address _chargeReceiver) external;

    /// @notice Change defaultFeeChargePercent
    /// @param _defaultFeeChargePercent new charge percent
    function modifyDefaultFeeChargePercent(uint24 _defaultFeeChargePercent) external;

    function deployPoolParams() external view returns(
        address tokenX,
        address tokenY,
        uint24 fee,
        int24 currentPoint,
        int24 pointDelta,
        uint24 feeChargePercent
    );
    
}

IiZiSwapFactory

feeX

feeY

flashCallback

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

interface IiZiSwapFlashCallback {

    /// @notice Call the msg.sender after sending tokens in IiZiSwapPool#flash.
    /// @dev Must repay the tokens to the pool within one call.
    /// @param feeX the fee amount in tokenX due to the pool by the end of the flash
    /// @param feeY the fee amount in tokenY due to the pool by the end of the flash
    /// @param data any data passed through by the caller
    function flashCallback(
        uint256 feeX,
        uint256 feeY,
        bytes calldata data
    ) external;

}


IiZiSwapFlashCallback

addAmount

acquireAmount

point

claimSold

claimEarn

sellXEarnY

AddLimitOrder

leftPoint

rightPoint

liquidity

amountX

amountY

Burn

collectDec

collectEarn

CollectLimitOrder

CollectLiquidity

decreaseAmount

DecLimitOrder

paidX

paidY

Flash

Mint

Swap

addLimOrderWithX

orderX

acquireY

addLimOrderWithY

orderY

acquireX

assignX

fromLegacy

assignLimOrderEarnX

actualAssignX

assignY

assignLimOrderEarnY

actualAssignY

leftPt

rightPt

liquidDelta

burn

amountXLim

amountYLim

collect

actualAmountX

actualAmountY

collectFeeCharged

isEarnY

collectLimOrder

actualCollectDec

actualCollectEarn

deltaX

decLimOrderWithX

actualDeltaX

legacyAccEarn

deltaY

decLimOrderWithY

actualDeltaY

newNextQueueLen

expandObservationQueue

flash

limitOrderData

sellingX

earnY

accEarnY

legacyAccEarnY

legacyEarnY

sellingY

earnX

legacyEarnX

accEarnX

legacyAccEarnX

limitOrderSnapshot

limitOrders

lastFeeScaleX_128

lastFeeScaleY_128

tokenOwedX

tokenOwedY

liquiditySnapshot

deltaLiquidities

mint

newFeeChargePercent

modifyFeeChargePercent

index

observations

timestamp

accPoint

init

secondsAgos

observe

accPoints

orderOrEndpoint

wordPosition

pointBitmap

points

liquidSum

accFeeXOut_128

accFeeYOut_128

isEndpt

sqrtRate_96

state

sqrtPrice_96

observationCurrentIndex

observationQueueLen

observationNextQueueLen

locked

liquidityX

lowPt

swapX2Y

desireY

swapX2YDesireY

highPt

swapY2X

desireX

swapY2XDesireX

totalFeeXCharged

totalFeeYCharged

userEarnX

lastAccEarn

sellingRemain

sellingDec

earn

legacyEarn

earnAssign

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