ERC-20
Source Code
Add Token to MetaMask (Web3)Overview
Max Total Supply
79.603154 GLP
Holders
586
Market
Price
$0.00 @ 0.000000 ETH
Onchain Market Cap
-
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 6 Decimals)
Balance
0.613737 GLPValue
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Contract Name:
GSP
Compiler Version
v0.8.16+commit.07a7930e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {GSPTrader} from "./GSPTrader.sol";
import {GSPFunding} from "./GSPFunding.sol";
import {GSPVault} from "./GSPVault.sol";
/**
* @title DODO GasSavingPool
* @author DODO Breeder
*
* @notice DODO GasSavingPool initialization
*/
contract GSP is GSPTrader, GSPFunding {
/**
* @notice Function will be called in factory, init risk should not be included.
* @param maintainer The dodo's address, who can claim mtFee and own this pool
* @param admin oracle owner address, who can set price.
* @param baseTokenAddress The base token address
* @param quoteTokenAddress The quote token address
* @param lpFeeRate The rate of lp fee, with 18 decimal
* @param mtFeeRate The rate of mt fee, with 18 decimal
* @param i The oracle price, possible to be changed only by maintainer
* @param k The swap curve parameter
* @param isOpenTWAP Useless, always false, just for compatible with old version pool
*/
function init(
address maintainer,
address admin,
address baseTokenAddress,
address quoteTokenAddress,
uint256 lpFeeRate,
uint256 mtFeeRate,
uint256 i,
uint256 k,
bool isOpenTWAP
) external {
// GSP can only be initialized once
require(!_GSP_INITIALIZED_, "GSP_INITIALIZED");
// _GSP_INITIALIZED_ is set to true after initialization
_GSP_INITIALIZED_ = true;
// baseTokenAddress and quoteTokenAddress should not be the same
require(baseTokenAddress != quoteTokenAddress, "BASE_QUOTE_CAN_NOT_BE_SAME");
// _BASE_TOKEN_ and _QUOTE_TOKEN_ should be valid ERC20 tokens
_BASE_TOKEN_ = IERC20(baseTokenAddress);
_QUOTE_TOKEN_ = IERC20(quoteTokenAddress);
// i should be greater than 0 and less than 10**36
require(i > 0 && i <= 10**36);
_I_ = i;
// k should be greater than 0 and less than 10**18
require(k <= 10**18);
_K_ = k;
// _LP_FEE_RATE_ is set when initialization
_LP_FEE_RATE_ = lpFeeRate;
// _MT_FEE_RATE_ is set when initialization
_MT_FEE_RATE_ = mtFeeRate;
// _MAINTAINER_ is set when initialization, the address receives the fee
_MAINTAINER_ = maintainer;
_ADMIN_ = admin;
// _IS_OPEN_TWAP_ is always false
_IS_OPEN_TWAP_ = false;
string memory connect = "_";
string memory suffix = "GSP";
// name of the shares is the combination of suffix, connect and string of the GSP
name = string(abi.encodePacked(suffix, connect, addressToShortString(address(this))));
// symbol of the shares is GLP
symbol = "GLP";
// decimals of the shares is the same as the base token decimals
decimals = IERC20Metadata(baseTokenAddress).decimals();
// initialize DOMAIN_SEPARATOR
buildDomainSeparator();
// ==========================================================================
}
// ============================== Permit ====================================
/**
* @notice DOMAIN_SEPARATOR is used for approve by signature
*/
function buildDomainSeparator() public returns (bytes32){
string memory connect = "_";
string memory suffix = "GSP";
// name of the shares is the combination of suffix, connect and string of the GSP
string memory name = string(abi.encodePacked(suffix, connect, addressToShortString(address(this))));
DOMAIN_SEPARATOR = keccak256(
abi.encode(
// keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f,
keccak256(bytes(name)),
keccak256(bytes("1")),
block.chainid,
address(this)
)
);
return DOMAIN_SEPARATOR;
}
/**
* @notice Convert the address to a shorter string
* @param _addr The address to convert
* @return A string representation of _addr in hexadecimal
*/
function addressToShortString(address _addr) public pure returns (string memory) {
bytes32 value = bytes32(uint256(uint160(_addr)));
bytes memory alphabet = "0123456789abcdef";
bytes memory str = new bytes(8);
for (uint256 i = 0; i < 4; i++) {
str[i * 2] = alphabet[uint8(value[i + 12] >> 4)];
str[1 + i * 2] = alphabet[uint8(value[i + 12] & 0x0f)];
}
return string(str);
}
// ============ Version Control ============
/**
* @notice Return the version of DODOGasSavingPool
* @return The current version is 1.0.1
*/
function version() external pure returns (string memory) {
return "GSP 1.0.1";
}
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
import {DecimalMath} from "../../lib/DecimalMath.sol";
import {PMMPricing} from "../../lib/PMMPricing.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {GSPStorage} from "./GSPStorage.sol";
contract GSPVault is GSPStorage {
using SafeERC20 for IERC20;
// ============ Modifiers ============
/// @notice Check whether the caller is maintainer
modifier onlyMaintainer() {
require(msg.sender == _MAINTAINER_, "ACCESS_DENIED");
_;
}
/// @notice Check whether the caller is admin
modifier onlyAdmin() {
require(msg.sender == _ADMIN_, "ADMIN_ACCESS_DENIED");
_;
}
// ============ Events ============
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
event Mint(address indexed user, uint256 value);
event Burn(address indexed user, uint256 value);
event MtFeeRateChange(uint256 newMtFee);
event IChange(uint256 newI);
event WithdrawMtFee(address indexed token, uint256 amount);
// ============ View Functions ============
/**
* @notice Get the reserves of the pool
* @return baseReserve The base token reserve
* @return quoteReserve The quote token reserve
*/
function getVaultReserve() external view returns (uint256 baseReserve, uint256 quoteReserve) {
baseReserve = _BASE_RESERVE_;
quoteReserve = _QUOTE_RESERVE_;
}
/**
* @notice Get the fee rate of the pool
* @param user Useless, just keep the same interface with old version pool
* @return lpFeeRate The lp fee rate
* @return mtFeeRate The mt fee rate
*/
function getUserFeeRate(address user)
external
view
returns (uint256 lpFeeRate, uint256 mtFeeRate)
{
lpFeeRate = _LP_FEE_RATE_;
mtFeeRate = _MT_FEE_RATE_;
}
// ============ Asset In ============
/**
* @notice Get the amount of base token transferred in
* @dev The amount of base token input should be the base token reserve minus the mt fee in base token
* @return input The amount of base token transferred in
*/
function getBaseInput() public view returns (uint256 input) {
return _BASE_TOKEN_.balanceOf(address(this)) - uint256(_BASE_RESERVE_) - uint256(_MT_FEE_BASE_);
}
/**
* @notice Get the amount of quote token transferred in
* @dev The amount of quote token input should be the quote token reserve minus the mt fee in quote token
* @return input The amount of quote token transferred in
*/
function getQuoteInput() public view returns (uint256 input) {
return _QUOTE_TOKEN_.balanceOf(address(this)) - uint256(_QUOTE_RESERVE_) - uint256(_MT_FEE_QUOTE_);
}
// ============ Set States ============
/**
* @notice Set the reserves of the pool, internal use only
* @param baseReserve The base token reserve
* @param quoteReserve The quote token reserve
*/
function _setReserve(uint256 baseReserve, uint256 quoteReserve) internal {
// the reserves should be less than the max uint112
require(baseReserve <= type(uint112).max && quoteReserve <= type(uint112).max, "OVERFLOW");
_BASE_RESERVE_ = uint112(baseReserve);
_QUOTE_RESERVE_ = uint112(quoteReserve);
}
/**
* @notice Sync the reserves of the pool, internal use only
* @dev The balances of the pool should be actual balances minus the mt fee
*/
function _sync() internal {
uint256 baseBalance = _BASE_TOKEN_.balanceOf(address(this)) - uint256(_MT_FEE_BASE_);
uint256 quoteBalance = _QUOTE_TOKEN_.balanceOf(address(this)) - uint256(_MT_FEE_QUOTE_);
// the reserves should be less than the max uint112
require(baseBalance <= type(uint112).max && quoteBalance <= type(uint112).max, "OVERFLOW");
if (baseBalance != _BASE_RESERVE_) {
_BASE_RESERVE_ = uint112(baseBalance);
}
if (quoteBalance != _QUOTE_RESERVE_) {
_QUOTE_RESERVE_ = uint112(quoteBalance);
}
}
/// @notice Sync the reserves of the pool
function sync() external nonReentrant {
_sync();
}
/// @notice Correct the rState of the pool, details in pmm algorithm
function correctRState() public {
if (_RState_ == uint32(PMMPricing.RState.BELOW_ONE) && _BASE_RESERVE_<_BASE_TARGET_) {
_RState_ = uint32(PMMPricing.RState.ONE);
_BASE_TARGET_ = _BASE_RESERVE_;
_QUOTE_TARGET_ = _QUOTE_RESERVE_;
}
if (_RState_ == uint32(PMMPricing.RState.ABOVE_ONE) && _QUOTE_RESERVE_<_QUOTE_TARGET_) {
_RState_ = uint32(PMMPricing.RState.ONE);
_BASE_TARGET_ = _BASE_RESERVE_;
_QUOTE_TARGET_ = _QUOTE_RESERVE_;
}
}
/**
* @notice PriceLimit is used for oracle change protection
* @notice It sets a ratio where the relative deviation between the new price and the old price cannot exceed this ratio.
* @dev The default priceLimit is 1e3, the decimals of priceLimit is 1e6
* @param priceLimit The new price limit
*/
function adjustPriceLimit(uint256 priceLimit) external onlyAdmin {
// the default priceLimit is 1e3
require(priceLimit <= 1e6, "INVALID_PRICE_LIMIT");
_PRICE_LIMIT_ = priceLimit;
}
/**
* @notice Adjust oricle price i, only for admin
*/
function adjustPrice(uint256 i) external onlyAdmin {
// the difference between i and _I_ should be less than priceLimit
uint256 offset = i > _I_ ? i - _I_ : _I_ - i;
require((offset * 1e6 / _I_) <= _PRICE_LIMIT_, "EXCEED_PRICE_LIMIT");
_I_ = i;
emit IChange(i);
}
/**
* @notice Adjust mtFee rate, only for maintainer
* @dev The decimals of mtFee rate is 1e18
* @param mtFeeRate The new mtFee rate
*/
function adjustMtFeeRate(uint256 mtFeeRate) external onlyMaintainer {
require(mtFeeRate <= 10**18, "INVALID_MT_FEE_RATE");
_MT_FEE_RATE_ = mtFeeRate;
emit MtFeeRateChange(mtFeeRate);
}
// ============ Asset Out ============
/**
* @notice Transfer base token out, internal use only
* @param to The address of the receiver
* @param amount The amount of base token to transfer out
*/
function _transferBaseOut(address to, uint256 amount) internal {
if (amount > 0) {
_BASE_TOKEN_.safeTransfer(to, amount);
}
}
/**
* @notice Transfer quote token out, internal use only
* @param to The address of the receiver
* @param amount The amount of quote token to transfer out
*/
function _transferQuoteOut(address to, uint256 amount) internal {
if (amount > 0) {
_QUOTE_TOKEN_.safeTransfer(to, amount);
}
}
/// @notice Maintainer withdraw mtFee, only for maintainer
function withdrawMtFeeTotal() external nonReentrant onlyMaintainer {
uint256 mtFeeQuote = _MT_FEE_QUOTE_;
uint256 mtFeeBase = _MT_FEE_BASE_;
_MT_FEE_QUOTE_ = 0;
_transferQuoteOut(_MAINTAINER_, mtFeeQuote);
_MT_FEE_BASE_ = 0;
_transferBaseOut(_MAINTAINER_, mtFeeBase);
emit WithdrawMtFee(address(_QUOTE_TOKEN_), mtFeeQuote);
emit WithdrawMtFee(address(_BASE_TOKEN_), mtFeeBase);
}
// ============ Shares (ERC20) ============
/**
* @dev Transfer token for a specified address
* @param to The address to transfer to.
* @param amount The amount to be transferred.
*/
function transfer(address to, uint256 amount) public returns (bool) {
require(amount <= _SHARES_[msg.sender], "BALANCE_NOT_ENOUGH");
_SHARES_[msg.sender] = _SHARES_[msg.sender] - (amount);
_SHARES_[to] = _SHARES_[to] + amount;
emit Transfer(msg.sender, to, amount);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the the balance of.
* @return balance An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) external view returns (uint256 balance) {
return _SHARES_[owner];
}
/**
* @dev Transfer tokens from one address to another
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param amount uint256 the amount of tokens to be transferred
*/
function transferFrom(
address from,
address to,
uint256 amount
) public returns (bool) {
require(amount <= _SHARES_[from], "BALANCE_NOT_ENOUGH");
require(amount <= _ALLOWED_[from][msg.sender], "ALLOWANCE_NOT_ENOUGH");
_SHARES_[from] = _SHARES_[from] - amount;
_SHARES_[to] = _SHARES_[to] + amount;
_ALLOWED_[from][msg.sender] = _ALLOWED_[from][msg.sender] - amount;
emit Transfer(from, to, amount);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param spender The address which will spend the funds.
* @param amount The amount of tokens to be spent.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
_ALLOWED_[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Function to check the amount of tokens that an owner _ALLOWED_ to a spender.
* @param owner address The address which owns the funds.
* @param spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _ALLOWED_[owner][spender];
}
function _mint(address user, uint256 value) internal {
require(value > 1000, "MINT_AMOUNT_NOT_ENOUGH");
_SHARES_[user] = _SHARES_[user] + value;
totalSupply = totalSupply + value;
emit Mint(user, value);
emit Transfer(address(0), user, value);
}
function _burn(address user, uint256 value) internal {
_SHARES_[user] = _SHARES_[user] - value;
totalSupply = totalSupply - value;
emit Burn(user, value);
emit Transfer(user, address(0), value);
}
// ============================ Permit ======================================
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(deadline >= block.timestamp, "DODO_GSP_LP: EXPIRED");
bytes32 digest =
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(
recoveredAddress != address(0) && recoveredAddress == owner,
"DODO_GSP_LP: INVALID_SIGNATURE"
);
_approve(owner, spender, value);
}
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
import {GSPVault} from "./GSPVault.sol";
import {DecimalMath} from "../../lib/DecimalMath.sol";
import {IDODOCallee} from "../../intf/IDODOCallee.sol";
/// @notice this part focus on Lp tokens, mint and burn
contract GSPFunding is GSPVault {
// ============ Events ============
event BuyShares(address to, uint256 increaseShares, uint256 totalShares);
event SellShares(address payer, address to, uint256 decreaseShares, uint256 totalShares);
// ============ Buy & Sell Shares ============
/// @notice User mint Lp token and deposit tokens, the result is rounded down
/// @dev User first transfer baseToken and quoteToken to GSP, then call buyShares
/// @param to The address will receive shares
/// @return shares The amount of shares user will receive
/// @return baseInput The amount of baseToken user transfer to GSP
/// @return quoteInput The amount of quoteToken user transfer to GSP
function buyShares(address to)
external
nonReentrant
returns (
uint256 shares,
uint256 baseInput,
uint256 quoteInput
)
{
// The balance of baseToken and quoteToken should be the balance minus the fee
uint256 baseBalance = _BASE_TOKEN_.balanceOf(address(this)) - _MT_FEE_BASE_;
uint256 quoteBalance = _QUOTE_TOKEN_.balanceOf(address(this)) - _MT_FEE_QUOTE_;
// The reserve of baseToken and quoteToken
uint256 baseReserve = _BASE_RESERVE_;
uint256 quoteReserve = _QUOTE_RESERVE_;
// The amount of baseToken and quoteToken user transfer to GSP
baseInput = baseBalance - baseReserve;
quoteInput = quoteBalance - quoteReserve;
// BaseToken should be transferred to GSP before calling buyShares
require(baseInput > 0, "NO_BASE_INPUT");
// Round down when withdrawing. Therefore, never be a situation occuring balance is 0 but totalsupply is not 0
// But May Happen，reserve >0 But totalSupply = 0
if (totalSupply == 0) {
// case 1. initial supply
require(quoteBalance > 0, "ZERO_QUOTE_AMOUNT");
// The shares will be minted to user
shares = quoteBalance < DecimalMath.mulFloor(baseBalance, _I_)
? DecimalMath.divFloor(quoteBalance, _I_)
: baseBalance;
// The target will be updated
_BASE_TARGET_ = uint112(shares);
_QUOTE_TARGET_ = uint112(DecimalMath.mulFloor(shares, _I_));
require(_QUOTE_TARGET_ > 0, "QUOTE_TARGET_IS_ZERO");
// Lock 1001 shares permanently in first deposit
require(shares > 2001, "MINT_AMOUNT_NOT_ENOUGH");
_mint(address(0), 1001);
shares -= 1001;
} else if (baseReserve > 0 && quoteReserve > 0) {
// case 2. normal case
uint256 baseInputRatio = DecimalMath.divFloor(baseInput, baseReserve);
uint256 quoteInputRatio = DecimalMath.divFloor(quoteInput, quoteReserve);
uint256 mintRatio = quoteInputRatio < baseInputRatio ? quoteInputRatio : baseInputRatio;
// The shares will be minted to user
shares = DecimalMath.mulFloor(totalSupply, mintRatio);
// The target will be updated
_BASE_TARGET_ = uint112(uint256(_BASE_TARGET_) + (DecimalMath.mulFloor(uint256(_BASE_TARGET_), mintRatio)));
_QUOTE_TARGET_ = uint112(uint256(_QUOTE_TARGET_) + (DecimalMath.mulFloor(uint256(_QUOTE_TARGET_), mintRatio)));
}
// The shares will be minted to user
// The reserve will be updated
_mint(to, shares);
_setReserve(baseBalance, quoteBalance);
emit BuyShares(to, shares, _SHARES_[to]);
}
/// @notice User burn their lp and withdraw their tokens, the result is rounded down
/// @dev User call sellShares, the calculated baseToken and quoteToken amount should geater than minBaseToken and minQuoteToken
/// @param shareAmount The amount of shares user want to sell
/// @param to The address will receive baseToken and quoteToken
/// @param baseMinAmount The minimum amount of baseToken user want to receive
/// @param quoteMinAmount The minimum amount of quoteToken user want to receive
/// @param data The data will be passed to callee contract
/// @param deadline The deadline of this transaction
function sellShares(
uint256 shareAmount,
address to,
uint256 baseMinAmount,
uint256 quoteMinAmount,
bytes calldata data,
uint256 deadline
) external nonReentrant returns (uint256 baseAmount, uint256 quoteAmount) {
// The deadline should be greater than current timestamp
require(deadline >= block.timestamp, "TIME_EXPIRED");
// The amount of shares user want to sell should be less than user's balance
require(shareAmount <= _SHARES_[msg.sender], "GLP_NOT_ENOUGH");
// The balance of baseToken and quoteToken should be the balance minus the fee
uint256 baseBalance = _BASE_TOKEN_.balanceOf(address(this)) - _MT_FEE_BASE_;
uint256 quoteBalance = _QUOTE_TOKEN_.balanceOf(address(this)) - _MT_FEE_QUOTE_;
// The total shares of GSP
uint256 totalShares = totalSupply;
// The amount of baseToken and quoteToken user will receive is calculated by the ratio of user's shares to total shares
baseAmount = baseBalance * shareAmount / totalShares;
quoteAmount = quoteBalance * shareAmount / totalShares;
// The target will be updated
_BASE_TARGET_ = uint112(uint256(_BASE_TARGET_) - DecimalMath._divCeil((uint256(_BASE_TARGET_) * (shareAmount)), totalShares));
_QUOTE_TARGET_ = uint112(uint256(_QUOTE_TARGET_) - DecimalMath._divCeil((uint256(_QUOTE_TARGET_) * (shareAmount)), totalShares));
// The calculated baseToken and quoteToken amount should geater than minBaseToken and minQuoteToken
require(
baseAmount >= baseMinAmount && quoteAmount >= quoteMinAmount,
"WITHDRAW_NOT_ENOUGH"
);
// The shares will be burned from user
// The baseToken and quoteToken will be transferred to user
// The reserve will be synced
_burn(msg.sender, shareAmount);
_transferBaseOut(to, baseAmount);
_transferQuoteOut(to, quoteAmount);
_sync();
// If the data is not empty, the callee contract will be called
if (data.length > 0) {
//Same as DVM
IDODOCallee(to).DVMSellShareCall(
msg.sender,
shareAmount,
baseAmount,
quoteAmount,
data
);
}
emit SellShares(msg.sender, to, shareAmount, _SHARES_[msg.sender]);
}
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
import {GSPVault} from "./GSPVault.sol";
import {DecimalMath} from "../../lib/DecimalMath.sol";
import {PMMPricing} from "../../lib/PMMPricing.sol";
import {IDODOCallee} from "../../intf/IDODOCallee.sol";
/// @notice this contract deal with swap
contract GSPTrader is GSPVault {
// ============ Events ============
event DODOSwap(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
address trader,
address receiver
);
event DODOFlashLoan(address borrower, address assetTo, uint256 baseAmount, uint256 quoteAmount);
event RChange(PMMPricing.RState newRState);
// ============ Trade Functions ============
/**
* @notice User sell base tokens, user pay tokens first. Must be used with a router
* @dev The base token balance is the actual balance minus the mt fee
* @param to The recipient of the output
* @return receiveQuoteAmount Amount of quote token received
*/
function sellBase(address to) external nonReentrant returns (uint256 receiveQuoteAmount) {
uint256 baseBalance = _BASE_TOKEN_.balanceOf(address(this)) - _MT_FEE_BASE_;
uint256 baseInput = baseBalance - uint256(_BASE_RESERVE_);
uint256 mtFee;
uint256 newBaseTarget;
PMMPricing.RState newRState;
// calculate the amount of quote token to receive and mt fee
(receiveQuoteAmount, mtFee, newRState, newBaseTarget) = querySellBase(tx.origin, baseInput);
// transfer quote token to recipient
_transferQuoteOut(to, receiveQuoteAmount);
// update mt fee in quote token
_MT_FEE_QUOTE_ = _MT_FEE_QUOTE_ + mtFee;
// update TARGET
if (_RState_ != uint32(newRState)) {
require(newBaseTarget <= type(uint112).max, "OVERFLOW");
_BASE_TARGET_ = uint112(newBaseTarget);
_RState_ = uint32(newRState);
emit RChange(newRState);
}
// update reserve
_setReserve(baseBalance, _QUOTE_TOKEN_.balanceOf(address(this)) - _MT_FEE_QUOTE_);
emit DODOSwap(
address(_BASE_TOKEN_),
address(_QUOTE_TOKEN_),
baseInput,
receiveQuoteAmount,
msg.sender,
to
);
}
/**
* @notice User sell quote tokens, user pay tokens first. Must be used with a router
* @param to The recipient of the output
* @return receiveBaseAmount Amount of base token received
*/
function sellQuote(address to) external nonReentrant returns (uint256 receiveBaseAmount) {
uint256 quoteBalance = _QUOTE_TOKEN_.balanceOf(address(this)) - _MT_FEE_QUOTE_;
uint256 quoteInput = quoteBalance - uint256(_QUOTE_RESERVE_);
uint256 mtFee;
uint256 newQuoteTarget;
PMMPricing.RState newRState;
// calculate the amount of base token to receive and mt fee
(receiveBaseAmount, mtFee, newRState, newQuoteTarget) = querySellQuote(
tx.origin,
quoteInput
);
// transfer base token to recipient
_transferBaseOut(to, receiveBaseAmount);
// update mt fee in base token
_MT_FEE_BASE_ = _MT_FEE_BASE_ + mtFee;
// update TARGET
if (_RState_ != uint32(newRState)) {
require(newQuoteTarget <= type(uint112).max, "OVERFLOW");
_QUOTE_TARGET_ = uint112(newQuoteTarget);
_RState_ = uint32(newRState);
emit RChange(newRState);
}
// update reserve
_setReserve((_BASE_TOKEN_.balanceOf(address(this)) - _MT_FEE_BASE_), quoteBalance);
emit DODOSwap(
address(_QUOTE_TOKEN_),
address(_BASE_TOKEN_),
quoteInput,
receiveBaseAmount,
msg.sender,
to
);
}
/**
* @notice inner flashloan, pay tokens out first, call external contract and check tokens left
* @param baseAmount The base token amount user require
* @param quoteAmount The quote token amount user require
* @param assetTo The address who uses above tokens
* @param data The external contract's callData
*/
function flashLoan(
uint256 baseAmount,
uint256 quoteAmount,
address assetTo,
bytes calldata data
) external nonReentrant {
_transferBaseOut(assetTo, baseAmount);
_transferQuoteOut(assetTo, quoteAmount);
if (data.length > 0)
IDODOCallee(assetTo).DSPFlashLoanCall(msg.sender, baseAmount, quoteAmount, data);
uint256 baseBalance = _BASE_TOKEN_.balanceOf(address(this)) - _MT_FEE_BASE_;
uint256 quoteBalance = _QUOTE_TOKEN_.balanceOf(address(this)) - _MT_FEE_QUOTE_;
// no input -> pure loss
require(
baseBalance >= _BASE_RESERVE_ || quoteBalance >= _QUOTE_RESERVE_,
"FLASH_LOAN_FAILED"
);
// sell quote case
// quote input + base output
if (baseBalance < _BASE_RESERVE_) {
uint256 quoteInput = quoteBalance - uint256(_QUOTE_RESERVE_);
(
uint256 receiveBaseAmount,
uint256 mtFee,
PMMPricing.RState newRState,
uint256 newQuoteTarget
) = querySellQuote(tx.origin, quoteInput); // revert if quoteBalance<quoteReserve
require(
(uint256(_BASE_RESERVE_) - baseBalance) <= receiveBaseAmount,
"FLASH_LOAN_FAILED"
);
_MT_FEE_BASE_ = _MT_FEE_BASE_ + mtFee;
if (_RState_ != uint32(newRState)) {
require(newQuoteTarget <= type(uint112).max, "OVERFLOW");
_QUOTE_TARGET_ = uint112(newQuoteTarget);
_RState_ = uint32(newRState);
emit RChange(newRState);
}
emit DODOSwap(
address(_QUOTE_TOKEN_),
address(_BASE_TOKEN_),
quoteInput,
receiveBaseAmount,
msg.sender,
assetTo
);
}
// sell base case
// base input + quote output
if (quoteBalance < _QUOTE_RESERVE_) {
uint256 baseInput = baseBalance - uint256(_BASE_RESERVE_);
(
uint256 receiveQuoteAmount,
uint256 mtFee,
PMMPricing.RState newRState,
uint256 newBaseTarget
) = querySellBase(tx.origin, baseInput); // revert if baseBalance<baseReserve
require(
(uint256(_QUOTE_RESERVE_) - quoteBalance) <= receiveQuoteAmount,
"FLASH_LOAN_FAILED"
);
_MT_FEE_QUOTE_ = _MT_FEE_QUOTE_ + mtFee;
if (_RState_ != uint32(newRState)) {
require(newBaseTarget <= type(uint112).max, "OVERFLOW");
_BASE_TARGET_ = uint112(newBaseTarget);
_RState_ = uint32(newRState);
emit RChange(newRState);
}
emit DODOSwap(
address(_BASE_TOKEN_),
address(_QUOTE_TOKEN_),
baseInput,
receiveQuoteAmount,
msg.sender,
assetTo
);
}
_sync();
emit DODOFlashLoan(msg.sender, assetTo, baseAmount, quoteAmount);
}
// ============ Query Functions ============
/**
* @notice Return swap result, for query, sellBase side.
* @param trader Useless, just to keep the same interface with old version pool
* @param payBaseAmount The amount of base token user want to sell
* @return receiveQuoteAmount The amount of quote token user will receive
* @return mtFee The amount of mt fee charged
* @return newRState The new RState after swap
* @return newBaseTarget The new base target after swap
*/
function querySellBase(address trader, uint256 payBaseAmount)
public
view
returns (
uint256 receiveQuoteAmount,
uint256 mtFee,
PMMPricing.RState newRState,
uint256 newBaseTarget
)
{
PMMPricing.PMMState memory state = getPMMState();
(receiveQuoteAmount, newRState) = PMMPricing.sellBaseToken(state, payBaseAmount);
uint256 lpFeeRate = _LP_FEE_RATE_;
uint256 mtFeeRate = _MT_FEE_RATE_;
mtFee = DecimalMath.mulFloor(receiveQuoteAmount, mtFeeRate);
receiveQuoteAmount = receiveQuoteAmount
- DecimalMath.mulFloor(receiveQuoteAmount, lpFeeRate)
- mtFee;
newBaseTarget = state.B0;
}
/**
* @notice Return swap result, for query, sellQuote side
* @param trader Useless, just for keeping the same interface with old version pool
* @param payQuoteAmount The amount of quote token user want to sell
* @return receiveBaseAmount The amount of base token user will receive
* @return mtFee The amount of mt fee charged
* @return newRState The new RState after swap
* @return newQuoteTarget The new quote target after swap
*/
function querySellQuote(address trader, uint256 payQuoteAmount)
public
view
returns (
uint256 receiveBaseAmount,
uint256 mtFee,
PMMPricing.RState newRState,
uint256 newQuoteTarget
)
{
PMMPricing.PMMState memory state = getPMMState();
(receiveBaseAmount, newRState) = PMMPricing.sellQuoteToken(state, payQuoteAmount);
uint256 lpFeeRate = _LP_FEE_RATE_;
uint256 mtFeeRate = _MT_FEE_RATE_;
mtFee = DecimalMath.mulFloor(receiveBaseAmount, mtFeeRate);
receiveBaseAmount = receiveBaseAmount
- DecimalMath.mulFloor(receiveBaseAmount, lpFeeRate)
- mtFee;
newQuoteTarget = state.Q0;
}
}// 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);
}// 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);
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
import {DODOMath} from "../../lib/DODOMath.sol";
import {DecimalMath} from "../../lib/DecimalMath.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {PMMPricing} from "../../lib/PMMPricing.sol";
/// @notice this contract is used for store state and read state
contract GSPStorage is ReentrancyGuard {
// ============ Storage for Setup ============
// _GSP_INITIALIZED_ will be set to true when the init function is called
bool internal _GSP_INITIALIZED_;
// GSP does not open TWAP by default
// _IS_OPEN_TWAP_ can be set to true when the init function is called
bool public _IS_OPEN_TWAP_ = false;
// ============ Core Address ============
// _MAINTAINER_ is the maintainer of GSP
address public _MAINTAINER_;
// _ADMIN_ can set price
address public _ADMIN_;
// _BASE_TOKEN_ and _QUOTE_TOKEN_ should be ERC20 token
IERC20 public _BASE_TOKEN_;
IERC20 public _QUOTE_TOKEN_;
// _BASE_RESERVE_ and _QUOTE_RESERVE_ are the current reserves of the GSP
uint112 public _BASE_RESERVE_;
uint112 public _QUOTE_RESERVE_;
// _BLOCK_TIMESTAMP_LAST_ is used when calculating TWAP
uint32 public _BLOCK_TIMESTAMP_LAST_;
// _BASE_PRICE_CUMULATIVE_LAST_ is used when calculating TWAP
uint256 public _BASE_PRICE_CUMULATIVE_LAST_;
// _BASE_TARGET_ and _QUOTE_TARGET_ are recalculated when the pool state changes
uint112 public _BASE_TARGET_;
uint112 public _QUOTE_TARGET_;
// _RState_ is the current R state of the GSP
uint32 public _RState_;
// ============ Shares (ERC20) ============
// symbol is the symbol of the shares
string public symbol;
// decimals is the decimals of the shares
uint8 public decimals;
// name is the name of the shares
string public name;
// totalSupply is the total supply of the shares
uint256 public totalSupply;
// _SHARES_ is the mapping from account to share balance, record the share balance of each account
mapping(address => uint256) internal _SHARES_;
mapping(address => mapping(address => uint256)) internal _ALLOWED_;
// ================= Permit ======================
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH =
0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint256) public nonces;
// ============ Variables for Pricing ============
// _MT_FEE_RATE_ is the fee rate of mt fee
uint256 public _MT_FEE_RATE_;
// _LP_FEE_RATE_ is the fee rate of lp fee
uint256 public _LP_FEE_RATE_;
uint256 public _K_;
uint256 public _I_;
// _PRICE_LIMIT_ is 1/1000 by default, which is used to limit the setting range of I
uint256 public _PRICE_LIMIT_ = 1e3;
// ============ Mt Fee ============
// _MT_FEE_BASE_ represents the mt fee in base token
uint256 public _MT_FEE_BASE_;
// _MT_FEE_QUOTE_ represents the mt fee in quote token
uint256 public _MT_FEE_QUOTE_;
// _MT_FEE_RATE_MODEL_ is useless, just for compatible with old version pool
address public _MT_FEE_RATE_MODEL_ = address(0);
// ============ Helper Functions ============
/// @notice Return the PMM state of the pool from inner or outside
/// @dev B0 and Q0 are calculated in adjustedTarget
/// @return state The current PMM state
function getPMMState() public view returns (PMMPricing.PMMState memory state) {
state.i = _I_;
state.K = _K_;
state.B = _BASE_RESERVE_;
state.Q = _QUOTE_RESERVE_;
state.B0 = _BASE_TARGET_; // will be calculated in adjustedTarget
state.Q0 = _QUOTE_TARGET_;
state.R = PMMPricing.RState(_RState_);
PMMPricing.adjustedTarget(state);
}
/// @notice Return the PMM state variables used for routeHelpers
/// @return i The price index
/// @return K The K value
/// @return B The base token reserve
/// @return Q The quote token reserve
/// @return B0 The base token target
/// @return Q0 The quote token target
/// @return R The R state of the pool
function getPMMStateForCall()
external
view
returns (
uint256 i,
uint256 K,
uint256 B,
uint256 Q,
uint256 B0,
uint256 Q0,
uint256 R
)
{
PMMPricing.PMMState memory state = getPMMState();
i = state.i;
K = state.K;
B = state.B;
Q = state.Q;
B0 = state.B0;
Q0 = state.Q0;
R = uint256(state.R);
}
/// @notice Return the adjusted mid price
/// @return midPrice The current mid price
function getMidPrice() public view returns (uint256 midPrice) {
return PMMPricing.getMidPrice(getPMMState());
}
/// @notice Return the total mt fee maintainer can claim
/// @dev The total mt fee is represented in two types: in base token and in quote token
/// @return mtFeeBase The total mt fee in base token
/// @return mtFeeQuote The total mt fee in quote token
function getMtFeeTotal() public view returns (uint256 mtFeeBase, uint256 mtFeeQuote) {
mtFeeBase = _MT_FEE_BASE_;
mtFeeQuote = _MT_FEE_QUOTE_;
}
}// 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));
}
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
pragma experimental ABIEncoderV2;
import {DecimalMath} from "../lib/DecimalMath.sol";
import {DODOMath} from "../lib/DODOMath.sol";
/**
* @title Pricing
* @author DODO Breeder
*
* @notice DODO Pricing model
*/
library PMMPricing {
enum RState {ONE, ABOVE_ONE, BELOW_ONE}
struct PMMState {
uint256 i;
uint256 K;
uint256 B;
uint256 Q;
uint256 B0;
uint256 Q0;
RState R;
}
// ============ buy & sell ============
/**
* @notice Inner calculation based on pmm algorithm, sell base
* @param state The current PMM state
* @param payBaseAmount The amount of base token user want to sell
* @return receiveQuoteAmount The amount of quote token user will receive
* @return newR The new R status after swap
*/
function sellBaseToken(PMMState memory state, uint256 payBaseAmount)
internal
pure
returns (uint256 receiveQuoteAmount, RState newR)
{
if (state.R == RState.ONE) {
// case 1: R=1
// R falls below one
receiveQuoteAmount = _ROneSellBaseToken(state, payBaseAmount);
newR = RState.BELOW_ONE;
} else if (state.R == RState.ABOVE_ONE) {
uint256 backToOnePayBase = state.B0 - state.B;
uint256 backToOneReceiveQuote = state.Q - state.Q0;
// case 2: R>1
// complex case, R status depends on trading amount
if (payBaseAmount < backToOnePayBase) {
// case 2.1: R status do not change
receiveQuoteAmount = _RAboveSellBaseToken(state, payBaseAmount);
newR = RState.ABOVE_ONE;
if (receiveQuoteAmount > backToOneReceiveQuote) {
// [Important corner case!] may enter this branch when some precision problem happens. And consequently contribute to negative spare quote amount
// to make sure spare quote>=0, mannually set receiveQuote=backToOneReceiveQuote
receiveQuoteAmount = backToOneReceiveQuote;
}
} else if (payBaseAmount == backToOnePayBase) {
// case 2.2: R status changes to ONE
receiveQuoteAmount = backToOneReceiveQuote;
newR = RState.ONE;
} else {
// case 2.3: R status changes to BELOW_ONE
receiveQuoteAmount = backToOneReceiveQuote + (
_ROneSellBaseToken(state, (payBaseAmount - backToOnePayBase))
);
newR = RState.BELOW_ONE;
}
} else {
// state.R == RState.BELOW_ONE
// case 3: R<1
receiveQuoteAmount = _RBelowSellBaseToken(state, payBaseAmount);
newR = RState.BELOW_ONE;
}
}
/**
* @notice Inner calculation based on pmm algorithm, sell quote
* @param state The current PMM state
* @param payQuoteAmount The amount of quote token user want to sell
* @return receiveBaseAmount The amount of base token user will receive
* @return newR The new R status after swap
*/
function sellQuoteToken(PMMState memory state, uint256 payQuoteAmount)
internal
pure
returns (uint256 receiveBaseAmount, RState newR)
{
if (state.R == RState.ONE) {
receiveBaseAmount = _ROneSellQuoteToken(state, payQuoteAmount);
newR = RState.ABOVE_ONE;
} else if (state.R == RState.ABOVE_ONE) {
receiveBaseAmount = _RAboveSellQuoteToken(state, payQuoteAmount);
newR = RState.ABOVE_ONE;
} else {
uint256 backToOnePayQuote = state.Q0 - state.Q;
uint256 backToOneReceiveBase = state.B - state.B0;
if (payQuoteAmount < backToOnePayQuote) {
receiveBaseAmount = _RBelowSellQuoteToken(state, payQuoteAmount);
newR = RState.BELOW_ONE;
if (receiveBaseAmount > backToOneReceiveBase) {
receiveBaseAmount = backToOneReceiveBase;
}
} else if (payQuoteAmount == backToOnePayQuote) {
receiveBaseAmount = backToOneReceiveBase;
newR = RState.ONE;
} else {
receiveBaseAmount = backToOneReceiveBase + (
_ROneSellQuoteToken(state, payQuoteAmount - backToOnePayQuote)
);
newR = RState.ABOVE_ONE;
}
}
}
// ============ R = 1 cases ============
function _ROneSellBaseToken(PMMState memory state, uint256 payBaseAmount)
internal
pure
returns (
uint256 // receiveQuoteToken
)
{
// in theory Q2 <= targetQuoteTokenAmount
// however when amount is close to 0, precision problems may cause Q2 > targetQuoteTokenAmount
return
DODOMath._SolveQuadraticFunctionForTrade(
state.Q0,
state.Q0,
payBaseAmount,
state.i,
state.K
);
}
function _ROneSellQuoteToken(PMMState memory state, uint256 payQuoteAmount)
internal
pure
returns (
uint256 // receiveBaseToken
)
{
return
DODOMath._SolveQuadraticFunctionForTrade(
state.B0,
state.B0,
payQuoteAmount,
DecimalMath.reciprocalFloor(state.i),
state.K
);
}
// ============ R < 1 cases ============
function _RBelowSellQuoteToken(PMMState memory state, uint256 payQuoteAmount)
internal
pure
returns (
uint256 // receiveBaseToken
)
{
return
DODOMath._GeneralIntegrate(
state.Q0,
state.Q + payQuoteAmount,
state.Q,
DecimalMath.reciprocalFloor(state.i),
state.K
);
}
function _RBelowSellBaseToken(PMMState memory state, uint256 payBaseAmount)
internal
pure
returns (
uint256 // receiveQuoteToken
)
{
return
DODOMath._SolveQuadraticFunctionForTrade(
state.Q0,
state.Q,
payBaseAmount,
state.i,
state.K
);
}
// ============ R > 1 cases ============
function _RAboveSellBaseToken(PMMState memory state, uint256 payBaseAmount)
internal
pure
returns (
uint256 // receiveQuoteToken
)
{
return
DODOMath._GeneralIntegrate(
state.B0,
state.B + payBaseAmount,
state.B,
state.i,
state.K
);
}
function _RAboveSellQuoteToken(PMMState memory state, uint256 payQuoteAmount)
internal
pure
returns (
uint256 // receiveBaseToken
)
{
return
DODOMath._SolveQuadraticFunctionForTrade(
state.B0,
state.B,
payQuoteAmount,
DecimalMath.reciprocalFloor(state.i),
state.K
);
}
// ============ Helper functions ============
function adjustedTarget(PMMState memory state) internal pure {
if (state.R == RState.BELOW_ONE) {
state.Q0 = DODOMath._SolveQuadraticFunctionForTarget(
state.Q,
state.B - state.B0,
state.i,
state.K
);
} else if (state.R == RState.ABOVE_ONE) {
state.B0 = DODOMath._SolveQuadraticFunctionForTarget(
state.B,
state.Q - state.Q0,
DecimalMath.reciprocalFloor(state.i),
state.K
);
}
}
function getMidPrice(PMMState memory state) internal pure returns (uint256) {
if (state.R == RState.BELOW_ONE) {
uint256 R = DecimalMath.divFloor(state.Q0 * state.Q0 / state.Q, state.Q);
R = DecimalMath.ONE - state.K + (DecimalMath.mulFloor(state.K, R));
return DecimalMath.divFloor(state.i, R);
} else {
uint256 R = DecimalMath.divFloor(state.B0 * state.B0 / state.B, state.B);
R = DecimalMath.ONE - state.K + (DecimalMath.mulFloor(state.K, R));
return DecimalMath.mulFloor(state.i, R);
}
}
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.16;
pragma experimental ABIEncoderV2;
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
/**
* @title DecimalMath
* @author DODO Breeder
*
* @notice Functions for fixed point number with 18 decimals
*/
library DecimalMath {
uint256 internal constant ONE = 10 ** 18;
uint256 internal constant ONE2 = 10 ** 36;
function mul(uint256 target, uint256 d) internal pure returns (uint256) {
return target * d / (10 ** 18);
}
function mulFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target * d / (10 ** 18);
}
function mulCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return _divCeil(target * d, 10 ** 18);
}
function div(uint256 target, uint256 d) internal pure returns (uint256) {
return target * (10 ** 18) / d;
}
function divFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target * (10 ** 18) / d;
}
function divCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return _divCeil(target * (10 ** 18), d);
}
function reciprocalFloor(uint256 target) internal pure returns (uint256) {
return uint256(10 ** 36) / target;
}
function reciprocalCeil(uint256 target) internal pure returns (uint256) {
return _divCeil(uint256(10 ** 36), target);
}
function sqrt(uint256 target) internal pure returns (uint256) {
return Math.sqrt(target * ONE);
}
function powFloor(uint256 target, uint256 e) internal pure returns (uint256) {
if (e == 0) {
return 10 ** 18;
} else if (e == 1) {
return target;
} else {
uint256 p = powFloor(target, e / 2);
p = p * p / (10 ** 18);
if (e % 2 == 1) {
p = p * target / (10 ** 18);
}
return p;
}
}
function _divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 quotient = a / b;
uint256 remainder = a - quotient * b;
if (remainder > 0) {
return quotient + 1;
} else {
return quotient;
}
}
}/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.8.16;
pragma experimental ABIEncoderV2;
interface IDODOCallee {
function DVMSellShareCall(
address sender,
uint256 burnShareAmount,
uint256 baseAmount,
uint256 quoteAmount,
bytes calldata data
) external;
function DVMFlashLoanCall(
address sender,
uint256 baseAmount,
uint256 quoteAmount,
bytes calldata data
) external;
function DPPFlashLoanCall(
address sender,
uint256 baseAmount,
uint256 quoteAmount,
bytes calldata data
) external;
function DSPFlashLoanCall(
address sender,
uint256 baseAmount,
uint256 quoteAmount,
bytes calldata data
) external;
function CPCancelCall(
address sender,
uint256 amount,
bytes calldata data
) external;
function CPClaimBidCall(
address sender,
uint256 baseAmount,
uint256 quoteAmount,
bytes calldata data
) external;
function NFTRedeemCall(
address payable assetTo,
uint256 quoteAmount,
bytes calldata
) external;
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.16;
pragma experimental ABIEncoderV2;
import {DecimalMath} from "./DecimalMath.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
/**
* @title DODOMath
* @author DODO Breeder
*
* @notice Functions for complex calculating. Including ONE Integration and TWO Quadratic solutions
*/
library DODOMath {
using Math for uint256;
/*
Integrate dodo curve from V1 to V2
require V0>=V1>=V2>0
res = (1-k)i(V1-V2)+ikV0*V0(1/V2-1/V1)
let V1-V2=delta
res = i*delta*(1-k+k(V0^2/V1/V2))
i is the price of V-res trading pair
support k=1 & k=0 case
[round down]
*/
function _GeneralIntegrate(
uint256 V0,
uint256 V1,
uint256 V2,
uint256 i,
uint256 k
) internal pure returns (uint256) {
require(V0 > 0, "TARGET_IS_ZERO");
uint256 fairAmount = i * (V1 - V2); // i*delta
if (k == 0) {
return fairAmount / DecimalMath.ONE;
}
uint256 V0V0V1V2 = DecimalMath.divFloor(V0 * V0 / V1, V2);
uint256 penalty = DecimalMath.mulFloor(k, V0V0V1V2); // k(V0^2/V1/V2)
return (DecimalMath.ONE - k + penalty) * fairAmount / DecimalMath.ONE2;
}
/*
Follow the integration function above
i*deltaB = (Q2-Q1)*(1-k+kQ0^2/Q1/Q2)
Assume Q2=Q0, Given Q1 and deltaB, solve Q0
i is the price of delta-V trading pair
give out target of V
support k=1 & k=0 case
[round down]
*/
function _SolveQuadraticFunctionForTarget(
uint256 V1,
uint256 delta,
uint256 i,
uint256 k
) internal pure returns (uint256) {
if (k == 0) {
return V1 + DecimalMath.mulFloor(i, delta);
}
// V0 = V1*(1+(sqrt-1)/2k)
// sqrt = √(1+4kidelta/V1)
// premium = 1+(sqrt-1)/2k
// uint256 sqrt = (4 * k).mul(i).mul(delta).div(V1).add(DecimalMath.ONE2).sqrt();
if (V1 == 0) {
return 0;
}
uint256 sqrt;
uint256 ki = 4 * k * i;
if (ki == 0) {
sqrt = DecimalMath.ONE;
} else if ((ki * delta) / ki == delta) {
sqrt =((ki * delta) / V1 + DecimalMath.ONE2).sqrt();
} else {
sqrt = (ki / V1 * delta + DecimalMath.ONE2).sqrt();
}
uint256 premium =
DecimalMath.divFloor(sqrt - DecimalMath.ONE, k * 2) + DecimalMath.ONE;
// V0 is greater than or equal to V1 according to the solution
return DecimalMath.mulFloor(V1, premium);
}
/*
Follow the integration expression above, we have:
i*deltaB = (Q2-Q1)*(1-k+kQ0^2/Q1/Q2)
Given Q1 and deltaB, solve Q2
This is a quadratic function and the standard version is
aQ2^2 + bQ2 + c = 0, where
a=1-k
-b=(1-k)Q1-kQ0^2/Q1+i*deltaB
c=-kQ0^2
and Q2=(-b+sqrt(b^2+4(1-k)kQ0^2))/2(1-k)
note: another root is negative, abondan
if deltaBSig=true, then Q2>Q1, user sell Q and receive B
if deltaBSig=false, then Q2<Q1, user sell B and receive Q
return |Q1-Q2|
as we only support sell amount as delta, the deltaB is always negative
the input ideltaB is actually -ideltaB in the equation
i is the price of delta-V trading pair
support k=1 & k=0 case
[round down]
*/
function _SolveQuadraticFunctionForTrade(
uint256 V0,
uint256 V1,
uint256 delta,
uint256 i,
uint256 k
) internal pure returns (uint256) {
require(V0 > 0, "TARGET_IS_ZERO");
if (delta == 0) {
return 0;
}
if (k == 0) {
// why v1
return DecimalMath.mulFloor(i, delta) > V1 ? V1 : DecimalMath.mulFloor(i, delta);
}
if (k == DecimalMath.ONE) {
// if k==1
// Q2=Q1/(1+ideltaBQ1/Q0/Q0)
// temp = ideltaBQ1/Q0/Q0
// Q2 = Q1/(1+temp)
// Q1-Q2 = Q1*(1-1/(1+temp)) = Q1*(temp/(1+temp))
// uint256 temp = i.mul(delta).mul(V1).div(V0.mul(V0));
uint256 temp;
uint256 idelta = i * (delta);
if (idelta == 0) {
temp = 0;
} else if ((idelta * V1) / idelta == V1) {
temp = (idelta * V1) / (V0 * V0);
} else {
temp = delta * (V1) / (V0) * (i) / (V0);
}
return V1 * (temp) / (temp + (DecimalMath.ONE));
}
// calculate -b value and sig
// b = kQ0^2/Q1-i*deltaB-(1-k)Q1
// part1 = (1-k)Q1 >=0
// part2 = kQ0^2/Q1-i*deltaB >=0
// bAbs = abs(part1-part2)
// if part1>part2 => b is negative => bSig is false
// if part2>part1 => b is positive => bSig is true
uint256 part2 = k * (V0) / (V1) * (V0) + (i * (delta)); // kQ0^2/Q1-i*deltaB
uint256 bAbs = (DecimalMath.ONE - k) * (V1); // (1-k)Q1
bool bSig;
if (bAbs >= part2) {
bAbs = bAbs - part2;
bSig = false;
} else {
bAbs = part2 - bAbs;
bSig = true;
}
bAbs = bAbs / (DecimalMath.ONE);
// calculate sqrt
uint256 squareRoot = DecimalMath.mulFloor((DecimalMath.ONE - k) * (4), DecimalMath.mulFloor(k, V0) * (V0)); // 4(1-k)kQ0^2
squareRoot = Math.sqrt((bAbs * bAbs) + squareRoot); // sqrt(b*b+4(1-k)kQ0*Q0)
// final res
uint256 denominator = (DecimalMath.ONE - k) * 2; // 2(1-k)
uint256 numerator;
if (bSig) {
numerator = squareRoot - bAbs;
if (numerator == 0) {
revert("DODOMath: should not be 0");
}
} else {
numerator = bAbs + squareRoot;
}
uint256 V2 = DecimalMath.divCeil(numerator, denominator);
if (V2 > V1) {
return 0;
} else {
return V1 - V2;
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}// 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);
}
}
}// 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);
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"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":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"increaseShares","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalShares","type":"uint256"}],"name":"BuyShares","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"borrower","type":"address"},{"indexed":false,"internalType":"address","name":"assetTo","type":"address"},{"indexed":false,"internalType":"uint256","name":"baseAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"quoteAmount","type":"uint256"}],"name":"DODOFlashLoan","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"fromToken","type":"address"},{"indexed":false,"internalType":"address","name":"toToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"fromAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toAmount","type":"uint256"},{"indexed":false,"internalType":"address","name":"trader","type":"address"},{"indexed":false,"internalType":"address","name":"receiver","type":"address"}],"name":"DODOSwap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newI","type":"uint256"}],"name":"IChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newMtFee","type":"uint256"}],"name":"MtFeeRateChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"enum PMMPricing.RState","name":"newRState","type":"uint8"}],"name":"RChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"payer","type":"address"},{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"decreaseShares","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalShares","type":"uint256"}],"name":"SellShares","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":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawMtFee","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_ADMIN_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BASE_PRICE_CUMULATIVE_LAST_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BASE_RESERVE_","outputs":[{"internalType":"uint112","name":"","type":"uint112"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BASE_TARGET_","outputs":[{"internalType":"uint112","name":"","type":"uint112"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BASE_TOKEN_","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BLOCK_TIMESTAMP_LAST_","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_IS_OPEN_TWAP_","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_I_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_K_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_LP_FEE_RATE_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_MAINTAINER_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_MT_FEE_BASE_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_MT_FEE_QUOTE_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_MT_FEE_RATE_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_MT_FEE_RATE_MODEL_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_PRICE_LIMIT_","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_QUOTE_RESERVE_","outputs":[{"internalType":"uint112","name":"","type":"uint112"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_QUOTE_TARGET_","outputs":[{"internalType":"uint112","name":"","type":"uint112"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_QUOTE_TOKEN_","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_RState_","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"addressToShortString","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"mtFeeRate","type":"uint256"}],"name":"adjustMtFeeRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"i","type":"uint256"}],"name":"adjustPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"priceLimit","type":"uint256"}],"name":"adjustPriceLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","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":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buildDomainSeparator","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"buyShares","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"uint256","name":"baseInput","type":"uint256"},{"internalType":"uint256","name":"quoteInput","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"correctRState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"baseAmount","type":"uint256"},{"internalType":"uint256","name":"quoteAmount","type":"uint256"},{"internalType":"address","name":"assetTo","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"flashLoan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getBaseInput","outputs":[{"internalType":"uint256","name":"input","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMidPrice","outputs":[{"internalType":"uint256","name":"midPrice","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMtFeeTotal","outputs":[{"internalType":"uint256","name":"mtFeeBase","type":"uint256"},{"internalType":"uint256","name":"mtFeeQuote","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPMMState","outputs":[{"components":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"K","type":"uint256"},{"internalType":"uint256","name":"B","type":"uint256"},{"internalType":"uint256","name":"Q","type":"uint256"},{"internalType":"uint256","name":"B0","type":"uint256"},{"internalType":"uint256","name":"Q0","type":"uint256"},{"internalType":"enum PMMPricing.RState","name":"R","type":"uint8"}],"internalType":"struct PMMPricing.PMMState","name":"state","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPMMStateForCall","outputs":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"K","type":"uint256"},{"internalType":"uint256","name":"B","type":"uint256"},{"internalType":"uint256","name":"Q","type":"uint256"},{"internalType":"uint256","name":"B0","type":"uint256"},{"internalType":"uint256","name":"Q0","type":"uint256"},{"internalType":"uint256","name":"R","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getQuoteInput","outputs":[{"internalType":"uint256","name":"input","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUserFeeRate","outputs":[{"internalType":"uint256","name":"lpFeeRate","type":"uint256"},{"internalType":"uint256","name":"mtFeeRate","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVaultReserve","outputs":[{"internalType":"uint256","name":"baseReserve","type":"uint256"},{"internalType":"uint256","name":"quoteReserve","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"maintainer","type":"address"},{"internalType":"address","name":"admin","type":"address"},{"internalType":"address","name":"baseTokenAddress","type":"address"},{"internalType":"address","name":"quoteTokenAddress","type":"address"},{"internalType":"uint256","name":"lpFeeRate","type":"uint256"},{"internalType":"uint256","name":"mtFeeRate","type":"uint256"},{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"k","type":"uint256"},{"internalType":"bool","name":"isOpenTWAP","type":"bool"}],"name":"init","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"trader","type":"address"},{"internalType":"uint256","name":"payBaseAmount","type":"uint256"}],"name":"querySellBase","outputs":[{"internalType":"uint256","name":"receiveQuoteAmount","type":"uint256"},{"internalType":"uint256","name":"mtFee","type":"uint256"},{"internalType":"enum PMMPricing.RState","name":"newRState","type":"uint8"},{"internalType":"uint256","name":"newBaseTarget","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"trader","type":"address"},{"internalType":"uint256","name":"payQuoteAmount","type":"uint256"}],"name":"querySellQuote","outputs":[{"internalType":"uint256","name":"receiveBaseAmount","type":"uint256"},{"internalType":"uint256","name":"mtFee","type":"uint256"},{"internalType":"enum PMMPricing.RState","name":"newRState","type":"uint8"},{"internalType":"uint256","name":"newQuoteTarget","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"sellBase","outputs":[{"internalType":"uint256","name":"receiveQuoteAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"sellQuote","outputs":[{"internalType":"uint256","name":"receiveBaseAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"shareAmount","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"baseMinAmount","type":"uint256"},{"internalType":"uint256","name":"quoteMinAmount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"sellShares","outputs":[{"internalType":"uint256","name":"baseAmount","type":"uint256"},{"internalType":"uint256","name":"quoteAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sync","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"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":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"withdrawMtFeeTotal","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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