Contract Name:
OneSplitWrap
Contract Source Code:
File 1 of 1 : OneSplitWrap
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @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 `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);
/**
* @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);
}
// File: contracts/IOneSplit.sol
pragma solidity ^0.5.0;
//
// [ msg.sender ]
// | |
// | |
// \_/
// +---------------+ ________________________________
// | OneSplitAudit | _______________________________ \
// +---------------+ \ \
// | | ______________ | | (staticcall)
// | | / ____________ \ | |
// | | (call) / / \ \ | |
// | | / / | | | |
// \_/ | | \_/ \_/
// +--------------+ | | +----------------------+
// | OneSplitWrap | | | | OneSplitViewWrap |
// +--------------+ | | +----------------------+
// | | | | | |
// | | (delegatecall) | | (staticcall) | | (staticcall)
// \_/ | | \_/
// +--------------+ | | +------------------+
// | OneSplit | | | | OneSplitView |
// +--------------+ | | +------------------+
// | | / /
// \ \________________/ /
// \__________________/
//
contract IOneSplitConsts {
// flags = FLAG_DISABLE_UNISWAP + FLAG_DISABLE_BANCOR + ...
uint256 internal constant FLAG_DISABLE_UNISWAP = 0x01;
uint256 internal constant DEPRECATED_FLAG_DISABLE_KYBER = 0x02; // Deprecated
uint256 internal constant FLAG_DISABLE_BANCOR = 0x04;
uint256 internal constant FLAG_DISABLE_OASIS = 0x08;
uint256 internal constant FLAG_DISABLE_COMPOUND = 0x10;
uint256 internal constant FLAG_DISABLE_FULCRUM = 0x20;
uint256 internal constant FLAG_DISABLE_CHAI = 0x40;
uint256 internal constant FLAG_DISABLE_AAVE = 0x80;
uint256 internal constant FLAG_DISABLE_SMART_TOKEN = 0x100;
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_ETH = 0x200; // Deprecated, Turned off by default
uint256 internal constant FLAG_DISABLE_BDAI = 0x400;
uint256 internal constant FLAG_DISABLE_IEARN = 0x800;
uint256 internal constant FLAG_DISABLE_CURVE_COMPOUND = 0x1000;
uint256 internal constant FLAG_DISABLE_CURVE_USDT = 0x2000;
uint256 internal constant FLAG_DISABLE_CURVE_Y = 0x4000;
uint256 internal constant FLAG_DISABLE_CURVE_BINANCE = 0x8000;
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_DAI = 0x10000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_USDC = 0x20000; // Deprecated, Turned off by default
uint256 internal constant FLAG_DISABLE_CURVE_SYNTHETIX = 0x40000;
uint256 internal constant FLAG_DISABLE_WETH = 0x80000;
uint256 internal constant FLAG_DISABLE_UNISWAP_COMPOUND = 0x100000; // Works only when one of assets is ETH or FLAG_ENABLE_MULTI_PATH_ETH
uint256 internal constant FLAG_DISABLE_UNISWAP_CHAI = 0x200000; // Works only when ETH<>DAI or FLAG_ENABLE_MULTI_PATH_ETH
uint256 internal constant FLAG_DISABLE_UNISWAP_AAVE = 0x400000; // Works only when one of assets is ETH or FLAG_ENABLE_MULTI_PATH_ETH
uint256 internal constant FLAG_DISABLE_IDLE = 0x800000;
uint256 internal constant FLAG_DISABLE_MOONISWAP = 0x1000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_V2 = 0x2000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_V2_ETH = 0x4000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_V2_DAI = 0x8000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_V2_USDC = 0x10000000;
uint256 internal constant FLAG_DISABLE_ALL_SPLIT_SOURCES = 0x20000000;
uint256 internal constant FLAG_DISABLE_ALL_WRAP_SOURCES = 0x40000000;
uint256 internal constant FLAG_DISABLE_CURVE_PAX = 0x80000000;
uint256 internal constant FLAG_DISABLE_CURVE_RENBTC = 0x100000000;
uint256 internal constant FLAG_DISABLE_CURVE_TBTC = 0x200000000;
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_USDT = 0x400000000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_WBTC = 0x800000000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_TBTC = 0x1000000000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_RENBTC = 0x2000000000; // Deprecated, Turned off by default
uint256 internal constant FLAG_DISABLE_DFORCE_SWAP = 0x4000000000;
uint256 internal constant FLAG_DISABLE_SHELL = 0x8000000000;
uint256 internal constant FLAG_ENABLE_CHI_BURN = 0x10000000000;
uint256 internal constant FLAG_DISABLE_MSTABLE_MUSD = 0x20000000000;
uint256 internal constant FLAG_DISABLE_CURVE_SBTC = 0x40000000000;
uint256 internal constant FLAG_DISABLE_DMM = 0x80000000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_ALL = 0x100000000000;
uint256 internal constant FLAG_DISABLE_CURVE_ALL = 0x200000000000;
uint256 internal constant FLAG_DISABLE_UNISWAP_V2_ALL = 0x400000000000;
uint256 internal constant FLAG_DISABLE_SPLIT_RECALCULATION = 0x800000000000;
uint256 internal constant FLAG_DISABLE_BALANCER_ALL = 0x1000000000000;
uint256 internal constant FLAG_DISABLE_BALANCER_1 = 0x2000000000000;
uint256 internal constant FLAG_DISABLE_BALANCER_2 = 0x4000000000000;
uint256 internal constant FLAG_DISABLE_BALANCER_3 = 0x8000000000000;
uint256 internal constant DEPRECATED_FLAG_ENABLE_KYBER_UNISWAP_RESERVE = 0x10000000000000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_KYBER_OASIS_RESERVE = 0x20000000000000; // Deprecated, Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_KYBER_BANCOR_RESERVE = 0x40000000000000; // Deprecated, Turned off by default
uint256 internal constant FLAG_ENABLE_REFERRAL_GAS_SPONSORSHIP = 0x80000000000000; // Turned off by default
uint256 internal constant DEPRECATED_FLAG_ENABLE_MULTI_PATH_COMP = 0x100000000000000; // Deprecated, Turned off by default
uint256 internal constant FLAG_DISABLE_KYBER_ALL = 0x200000000000000;
uint256 internal constant FLAG_DISABLE_KYBER_1 = 0x400000000000000;
uint256 internal constant FLAG_DISABLE_KYBER_2 = 0x800000000000000;
uint256 internal constant FLAG_DISABLE_KYBER_3 = 0x1000000000000000;
uint256 internal constant FLAG_DISABLE_KYBER_4 = 0x2000000000000000;
uint256 internal constant FLAG_ENABLE_CHI_BURN_BY_ORIGIN = 0x4000000000000000;
uint256 internal constant FLAG_DISABLE_MOONISWAP_ALL = 0x8000000000000000;
uint256 internal constant FLAG_DISABLE_MOONISWAP_ETH = 0x10000000000000000;
uint256 internal constant FLAG_DISABLE_MOONISWAP_DAI = 0x20000000000000000;
uint256 internal constant FLAG_DISABLE_MOONISWAP_USDC = 0x40000000000000000;
uint256 internal constant FLAG_DISABLE_MOONISWAP_POOL_TOKEN = 0x80000000000000000;
}
contract IOneSplit is IOneSplitConsts {
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags // See constants in IOneSplit.sol
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
);
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags, // See constants in IOneSplit.sol
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
);
function swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 minReturn,
uint256[] memory distribution,
uint256 flags
)
public
payable
returns(uint256 returnAmount);
}
contract IOneSplitMulti is IOneSplit {
function getExpectedReturnWithGasMulti(
IERC20[] memory tokens,
uint256 amount,
uint256[] memory parts,
uint256[] memory flags,
uint256[] memory destTokenEthPriceTimesGasPrices
)
public
view
returns(
uint256[] memory returnAmounts,
uint256 estimateGasAmount,
uint256[] memory distribution
);
function swapMulti(
IERC20[] memory tokens,
uint256 amount,
uint256 minReturn,
uint256[] memory distribution,
uint256[] memory flags
)
public
payable
returns(uint256 returnAmount);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/interface/IUniswapExchange.sol
pragma solidity ^0.5.0;
interface IUniswapExchange {
function getEthToTokenInputPrice(uint256 ethSold) external view returns (uint256 tokensBought);
function getTokenToEthInputPrice(uint256 tokensSold) external view returns (uint256 ethBought);
function ethToTokenSwapInput(uint256 minTokens, uint256 deadline)
external
payable
returns (uint256 tokensBought);
function tokenToEthSwapInput(uint256 tokensSold, uint256 minEth, uint256 deadline)
external
returns (uint256 ethBought);
function tokenToTokenSwapInput(
uint256 tokensSold,
uint256 minTokensBought,
uint256 minEthBought,
uint256 deadline,
address tokenAddr
) external returns (uint256 tokensBought);
}
// File: contracts/interface/IUniswapFactory.sol
pragma solidity ^0.5.0;
interface IUniswapFactory {
function getExchange(IERC20 token) external view returns (IUniswapExchange exchange);
}
// File: contracts/interface/IKyberNetworkContract.sol
pragma solidity ^0.5.0;
interface IKyberNetworkContract {
function searchBestRate(IERC20 src, IERC20 dest, uint256 srcAmount, bool usePermissionless)
external
view
returns (address reserve, uint256 rate);
}
// File: contracts/interface/IKyberNetworkProxy.sol
pragma solidity ^0.5.0;
interface IKyberNetworkProxy {
function getExpectedRateAfterFee(
IERC20 src,
IERC20 dest,
uint256 srcQty,
uint256 platformFeeBps,
bytes calldata hint
) external view returns (uint256 expectedRate);
function tradeWithHintAndFee(
IERC20 src,
uint256 srcAmount,
IERC20 dest,
address payable destAddress,
uint256 maxDestAmount,
uint256 minConversionRate,
address payable platformWallet,
uint256 platformFeeBps,
bytes calldata hint
) external payable returns (uint256 destAmount);
function kyberNetworkContract() external view returns (IKyberNetworkContract);
// TODO: Limit usage by tx.gasPrice
// function maxGasPrice() external view returns (uint256);
// TODO: Limit usage by user cap
// function getUserCapInWei(address user) external view returns (uint256);
// function getUserCapInTokenWei(address user, IERC20 token) external view returns (uint256);
}
// File: contracts/interface/IKyberStorage.sol
pragma solidity ^0.5.0;
interface IKyberStorage {
function getReserveIdsPerTokenSrc(
IERC20 token
) external view returns (bytes32[] memory);
}
// File: contracts/interface/IKyberHintHandler.sol
pragma solidity ^0.5.0;
interface IKyberHintHandler {
enum TradeType {
BestOfAll,
MaskIn,
MaskOut,
Split
}
function buildTokenToEthHint(
IERC20 tokenSrc,
TradeType tokenToEthType,
bytes32[] calldata tokenToEthReserveIds,
uint256[] calldata tokenToEthSplits
) external view returns (bytes memory hint);
function buildEthToTokenHint(
IERC20 tokenDest,
TradeType ethToTokenType,
bytes32[] calldata ethToTokenReserveIds,
uint256[] calldata ethToTokenSplits
) external view returns (bytes memory hint);
}
// File: contracts/interface/IBancorNetwork.sol
pragma solidity ^0.5.0;
interface IBancorNetwork {
function getReturnByPath(address[] calldata path, uint256 amount)
external
view
returns (uint256 returnAmount, uint256 conversionFee);
function claimAndConvert(address[] calldata path, uint256 amount, uint256 minReturn)
external
returns (uint256);
function convert(address[] calldata path, uint256 amount, uint256 minReturn)
external
payable
returns (uint256);
}
// File: contracts/interface/IBancorContractRegistry.sol
pragma solidity ^0.5.0;
contract IBancorContractRegistry {
function addressOf(bytes32 contractName) external view returns (address);
}
// File: contracts/interface/IBancorNetworkPathFinder.sol
pragma solidity ^0.5.0;
interface IBancorNetworkPathFinder {
function generatePath(IERC20 sourceToken, IERC20 targetToken)
external
view
returns (address[] memory);
}
// File: contracts/interface/IBancorConverterRegistry.sol
pragma solidity ^0.5.0;
interface IBancorConverterRegistry {
function getConvertibleTokenSmartTokenCount(IERC20 convertibleToken)
external view returns(uint256);
function getConvertibleTokenSmartTokens(IERC20 convertibleToken)
external view returns(address[] memory);
function getConvertibleTokenSmartToken(IERC20 convertibleToken, uint256 index)
external view returns(address);
function isConvertibleTokenSmartToken(IERC20 convertibleToken, address value)
external view returns(bool);
}
// File: contracts/interface/IBancorEtherToken.sol
pragma solidity ^0.5.0;
contract IBancorEtherToken is IERC20 {
function deposit() external payable;
function withdraw(uint256 amount) external;
}
// File: contracts/interface/IBancorFinder.sol
pragma solidity ^0.5.0;
interface IBancorFinder {
function buildBancorPath(
IERC20 fromToken,
IERC20 destToken
)
external
view
returns(address[] memory path);
}
// File: contracts/interface/IOasisExchange.sol
pragma solidity ^0.5.0;
interface IOasisExchange {
function getBuyAmount(IERC20 buyGem, IERC20 payGem, uint256 payAmt)
external
view
returns (uint256 fillAmt);
function sellAllAmount(IERC20 payGem, uint256 payAmt, IERC20 buyGem, uint256 minFillAmount)
external
returns (uint256 fillAmt);
}
// File: contracts/interface/IWETH.sol
pragma solidity ^0.5.0;
contract IWETH is IERC20 {
function deposit() external payable;
function withdraw(uint256 amount) external;
}
// File: contracts/interface/ICurve.sol
pragma solidity ^0.5.0;
interface ICurve {
// solium-disable-next-line mixedcase
function get_dy_underlying(int128 i, int128 j, uint256 dx) external view returns(uint256 dy);
// solium-disable-next-line mixedcase
function get_dy(int128 i, int128 j, uint256 dx) external view returns(uint256 dy);
// solium-disable-next-line mixedcase
function exchange_underlying(int128 i, int128 j, uint256 dx, uint256 minDy) external;
// solium-disable-next-line mixedcase
function exchange(int128 i, int128 j, uint256 dx, uint256 minDy) external;
}
contract ICurveRegistry {
function get_pool_info(address pool)
external
view
returns(
uint256[8] memory balances,
uint256[8] memory underlying_balances,
uint256[8] memory decimals,
uint256[8] memory underlying_decimals,
address lp_token,
uint256 A,
uint256 fee
);
}
contract ICurveCalculator {
function get_dy(
int128 nCoins,
uint256[8] calldata balances,
uint256 amp,
uint256 fee,
uint256[8] calldata rates,
uint256[8] calldata precisions,
bool underlying,
int128 i,
int128 j,
uint256[100] calldata dx
) external view returns(uint256[100] memory dy);
}
// File: contracts/interface/IChai.sol
pragma solidity ^0.5.0;
interface IPot {
function dsr() external view returns (uint256);
function chi() external view returns (uint256);
function rho() external view returns (uint256);
function drip() external returns (uint256);
function join(uint256) external;
function exit(uint256) external;
}
contract IChai is IERC20 {
function POT() public view returns (IPot);
function join(address dst, uint256 wad) external;
function exit(address src, uint256 wad) external;
}
library ChaiHelper {
IPot private constant POT = IPot(0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7);
uint256 private constant RAY = 10**27;
function _mul(uint256 x, uint256 y) private pure returns (uint256 z) {
require(y == 0 || (z = x * y) / y == x);
}
function _rmul(uint256 x, uint256 y) private pure returns (uint256 z) {
// always rounds down
z = _mul(x, y) / RAY;
}
function _rdiv(uint256 x, uint256 y) private pure returns (uint256 z) {
// always rounds down
z = _mul(x, RAY) / y;
}
function rpow(uint256 x, uint256 n, uint256 base) private pure returns (uint256 z) {
// solium-disable-next-line security/no-inline-assembly
assembly {
switch x
case 0 {
switch n
case 0 {
z := base
}
default {
z := 0
}
}
default {
switch mod(n, 2)
case 0 {
z := base
}
default {
z := x
}
let half := div(base, 2) // for rounding.
for {
n := div(n, 2)
} n {
n := div(n, 2)
} {
let xx := mul(x, x)
if iszero(eq(div(xx, x), x)) {
revert(0, 0)
}
let xxRound := add(xx, half)
if lt(xxRound, xx) {
revert(0, 0)
}
x := div(xxRound, base)
if mod(n, 2) {
let zx := mul(z, x)
if and(iszero(iszero(x)), iszero(eq(div(zx, x), z))) {
revert(0, 0)
}
let zxRound := add(zx, half)
if lt(zxRound, zx) {
revert(0, 0)
}
z := div(zxRound, base)
}
}
}
}
}
function potDrip() private view returns (uint256) {
return _rmul(rpow(POT.dsr(), now - POT.rho(), RAY), POT.chi());
}
function chaiPrice(IChai chai) internal view returns(uint256) {
return chaiToDai(chai, 1e18);
}
function daiToChai(
IChai /*chai*/,
uint256 amount
) internal view returns (uint256) {
uint256 chi = (now > POT.rho()) ? potDrip() : POT.chi();
return _rdiv(amount, chi);
}
function chaiToDai(
IChai /*chai*/,
uint256 amount
) internal view returns (uint256) {
uint256 chi = (now > POT.rho()) ? potDrip() : POT.chi();
return _rmul(chi, amount);
}
}
// File: contracts/interface/ICompound.sol
pragma solidity ^0.5.0;
contract ICompound {
function markets(address cToken)
external
view
returns (bool isListed, uint256 collateralFactorMantissa);
}
contract ICompoundToken is IERC20 {
function underlying() external view returns (address);
function exchangeRateStored() external view returns (uint256);
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
}
contract ICompoundEther is IERC20 {
function mint() external payable;
function redeem(uint256 redeemTokens) external returns (uint256);
}
// File: contracts/interface/ICompoundRegistry.sol
pragma solidity ^0.5.0;
contract ICompoundRegistry {
function tokenByCToken(ICompoundToken cToken) external view returns(IERC20);
function cTokenByToken(IERC20 token) external view returns(ICompoundToken);
}
// File: contracts/interface/IAaveToken.sol
pragma solidity ^0.5.0;
contract IAaveToken is IERC20 {
function underlyingAssetAddress() external view returns (IERC20);
function redeem(uint256 amount) external;
}
interface IAaveLendingPool {
function core() external view returns (address);
function deposit(IERC20 token, uint256 amount, uint16 refCode) external payable;
}
// File: contracts/interface/IAaveRegistry.sol
pragma solidity ^0.5.0;
contract IAaveRegistry {
function tokenByAToken(IAaveToken aToken) external view returns(IERC20);
function aTokenByToken(IERC20 token) external view returns(IAaveToken);
}
// File: contracts/interface/IMooniswap.sol
pragma solidity ^0.5.0;
interface IMooniswapRegistry {
function pools(IERC20 token1, IERC20 token2) external view returns(IMooniswap);
function isPool(address addr) external view returns(bool);
}
interface IMooniswap {
function fee() external view returns (uint256);
function tokens(uint256 i) external view returns (IERC20);
function deposit(uint256[] calldata amounts, uint256 minReturn) external payable returns(uint256 fairSupply);
function withdraw(uint256 amount, uint256[] calldata minReturns) external;
function getBalanceForAddition(IERC20 token) external view returns(uint256);
function getBalanceForRemoval(IERC20 token) external view returns(uint256);
function getReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount
)
external
view
returns(uint256 returnAmount);
function swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 minReturn,
address referral
)
external
payable
returns(uint256 returnAmount);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
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'
// solhint-disable-next-line max-line-length
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));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: contracts/UniversalERC20.sol
pragma solidity ^0.5.0;
library UniversalERC20 {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 private constant ZERO_ADDRESS = IERC20(0x0000000000000000000000000000000000000000);
IERC20 private constant ETH_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
function universalTransfer(IERC20 token, address to, uint256 amount) internal returns(bool) {
if (amount == 0) {
return true;
}
if (isETH(token)) {
address(uint160(to)).transfer(amount);
} else {
token.safeTransfer(to, amount);
return true;
}
}
function universalTransferFrom(IERC20 token, address from, address to, uint256 amount) internal {
if (amount == 0) {
return;
}
if (isETH(token)) {
require(from == msg.sender && msg.value >= amount, "Wrong useage of ETH.universalTransferFrom()");
if (to != address(this)) {
address(uint160(to)).transfer(amount);
}
if (msg.value > amount) {
msg.sender.transfer(msg.value.sub(amount));
}
} else {
token.safeTransferFrom(from, to, amount);
}
}
function universalTransferFromSenderToThis(IERC20 token, uint256 amount) internal {
if (amount == 0) {
return;
}
if (isETH(token)) {
if (msg.value > amount) {
// Return remainder if exist
msg.sender.transfer(msg.value.sub(amount));
}
} else {
token.safeTransferFrom(msg.sender, address(this), amount);
}
}
function universalApprove(IERC20 token, address to, uint256 amount) internal {
if (!isETH(token)) {
if (amount == 0) {
token.safeApprove(to, 0);
return;
}
uint256 allowance = token.allowance(address(this), to);
if (allowance < amount) {
if (allowance > 0) {
token.safeApprove(to, 0);
}
token.safeApprove(to, amount);
}
}
}
function universalBalanceOf(IERC20 token, address who) internal view returns (uint256) {
if (isETH(token)) {
return who.balance;
} else {
return token.balanceOf(who);
}
}
function universalDecimals(IERC20 token) internal view returns (uint256) {
if (isETH(token)) {
return 18;
}
(bool success, bytes memory data) = address(token).staticcall.gas(10000)(
abi.encodeWithSignature("decimals()")
);
if (!success || data.length == 0) {
(success, data) = address(token).staticcall.gas(10000)(
abi.encodeWithSignature("DECIMALS()")
);
}
return (success && data.length > 0) ? abi.decode(data, (uint256)) : 18;
}
function isETH(IERC20 token) internal pure returns(bool) {
return (address(token) == address(ZERO_ADDRESS) || address(token) == address(ETH_ADDRESS));
}
function eq(IERC20 a, IERC20 b) internal pure returns(bool) {
return a == b || (isETH(a) && isETH(b));
}
function notExist(IERC20 token) internal pure returns(bool) {
return (address(token) == address(-1));
}
}
// File: contracts/interface/IUniswapV2Exchange.sol
pragma solidity ^0.5.0;
interface IUniswapV2Exchange {
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
}
library UniswapV2ExchangeLib {
using SafeMath for uint256;
using UniversalERC20 for IERC20;
function getReturn(
IUniswapV2Exchange exchange,
IERC20 fromToken,
IERC20 destToken,
uint amountIn
) internal view returns (uint256) {
uint256 reserveIn = fromToken.universalBalanceOf(address(exchange));
uint256 reserveOut = destToken.universalBalanceOf(address(exchange));
uint256 amountInWithFee = amountIn.mul(997);
uint256 numerator = amountInWithFee.mul(reserveOut);
uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);
return (denominator == 0) ? 0 : numerator.div(denominator);
}
}
// File: contracts/interface/IUniswapV2Factory.sol
pragma solidity ^0.5.0;
interface IUniswapV2Factory {
function getPair(IERC20 tokenA, IERC20 tokenB) external view returns (IUniswapV2Exchange pair);
}
// File: contracts/interface/IDForceSwap.sol
pragma solidity ^0.5.0;
interface IDForceSwap {
function getAmountByInput(IERC20 input, IERC20 output, uint256 amount) external view returns(uint256);
function swap(IERC20 input, IERC20 output, uint256 amount) external;
}
// File: contracts/interface/IShell.sol
pragma solidity ^0.5.0;
interface IShell {
function viewOriginTrade(
address origin,
address target,
uint256 originAmount
) external view returns (uint256);
function swapByOrigin(
address origin,
address target,
uint256 originAmount,
uint256 minTargetAmount,
uint256 deadline
) external returns (uint256);
}
// File: contracts/interface/IMStable.sol
pragma solidity ^0.5.0;
contract IMStable is IERC20 {
function getSwapOutput(
IERC20 _input,
IERC20 _output,
uint256 _quantity
)
external
view
returns (bool, string memory, uint256 output);
function swap(
IERC20 _input,
IERC20 _output,
uint256 _quantity,
address _recipient
)
external
returns (uint256 output);
function redeem(
IERC20 _basset,
uint256 _bassetQuantity
)
external
returns (uint256 massetRedeemed);
}
interface IMassetValidationHelper {
/**
* @dev Returns a valid bAsset to redeem
* @param _mAsset Masset addr
* @return valid bool
* @return string message
* @return address of bAsset to redeem
*/
function suggestRedeemAsset(
IERC20 _mAsset
)
external
view
returns (
bool valid,
string memory err,
address token
);
/**
* @dev Returns a valid bAsset with which to mint
* @param _mAsset Masset addr
* @return valid bool
* @return string message
* @return address of bAsset to mint
*/
function suggestMintAsset(
IERC20 _mAsset
)
external
view
returns (
bool valid,
string memory err,
address token
);
/**
* @dev Determines if a given Redemption is valid
* @param _mAsset Address of the given mAsset (e.g. mUSD)
* @param _mAssetQuantity Amount of mAsset to redeem (in mUSD units)
* @param _outputBasset Desired output bAsset
* @return valid
* @return validity reason
* @return output in bAsset units
* @return bAssetQuantityArg - required input argument to the 'redeem' call
*/
function getRedeemValidity(
IERC20 _mAsset,
uint256 _mAssetQuantity,
IERC20 _outputBasset
)
external
view
returns (
bool valid,
string memory,
uint256 output,
uint256 bassetQuantityArg
);
}
// File: contracts/interface/IBalancerPool.sol
pragma solidity ^0.5.0;
interface IBalancerPool {
function getSwapFee()
external view returns (uint256 balance);
function getDenormalizedWeight(IERC20 token)
external view returns (uint256 balance);
function getBalance(IERC20 token)
external view returns (uint256 balance);
function swapExactAmountIn(
IERC20 tokenIn,
uint256 tokenAmountIn,
IERC20 tokenOut,
uint256 minAmountOut,
uint256 maxPrice
)
external
returns (uint256 tokenAmountOut, uint256 spotPriceAfter);
}
// 0xA961672E8Db773be387e775bc4937C678F3ddF9a
interface IBalancerHelper {
function getReturns(
IBalancerPool pool,
IERC20 fromToken,
IERC20 destToken,
uint256[] calldata amounts
)
external
view
returns(uint256[] memory rets);
}
// File: contracts/interface/IBalancerRegistry.sol
pragma solidity ^0.5.0;
interface IBalancerRegistry {
event PoolAdded(
address indexed pool
);
event PoolTokenPairAdded(
address indexed pool,
address indexed fromToken,
address indexed destToken
);
event IndicesUpdated(
address indexed fromToken,
address indexed destToken,
bytes32 oldIndices,
bytes32 newIndices
);
// Get info about pool pair for 1 SLOAD
function getPairInfo(address pool, address fromToken, address destToken)
external view returns(uint256 weight1, uint256 weight2, uint256 swapFee);
// Pools
function checkAddedPools(address pool)
external view returns(bool);
function getAddedPoolsLength()
external view returns(uint256);
function getAddedPools()
external view returns(address[] memory);
function getAddedPoolsWithLimit(uint256 offset, uint256 limit)
external view returns(address[] memory result);
// Tokens
function getAllTokensLength()
external view returns(uint256);
function getAllTokens()
external view returns(address[] memory);
function getAllTokensWithLimit(uint256 offset, uint256 limit)
external view returns(address[] memory result);
// Pairs
function getPoolsLength(address fromToken, address destToken)
external view returns(uint256);
function getPools(address fromToken, address destToken)
external view returns(address[] memory);
function getPoolsWithLimit(address fromToken, address destToken, uint256 offset, uint256 limit)
external view returns(address[] memory result);
function getBestPools(address fromToken, address destToken)
external view returns(address[] memory pools);
function getBestPoolsWithLimit(address fromToken, address destToken, uint256 limit)
external view returns(address[] memory pools);
// Get swap rates
function getPoolReturn(address pool, address fromToken, address destToken, uint256 amount)
external view returns(uint256);
function getPoolReturns(address pool, address fromToken, address destToken, uint256[] calldata amounts)
external view returns(uint256[] memory result);
// Add and update registry
function addPool(address pool) external returns(uint256 listed);
function addPools(address[] calldata pools) external returns(uint256[] memory listed);
function updatedIndices(address[] calldata tokens, uint256 lengthLimit) external;
}
// File: contracts/BalancerLib.sol
pragma solidity ^0.5.0;
library BalancerLib {
uint public constant BONE = 10**18;
uint public constant MIN_BOUND_TOKENS = 2;
uint public constant MAX_BOUND_TOKENS = 8;
uint public constant MIN_FEE = BONE / 10**6;
uint public constant MAX_FEE = BONE / 10;
uint public constant EXIT_FEE = 0;
uint public constant MIN_WEIGHT = BONE;
uint public constant MAX_WEIGHT = BONE * 50;
uint public constant MAX_TOTAL_WEIGHT = BONE * 50;
uint public constant MIN_BALANCE = BONE / 10**12;
uint public constant INIT_POOL_SUPPLY = BONE * 100;
uint public constant MIN_BPOW_BASE = 1 wei;
uint public constant MAX_BPOW_BASE = (2 * BONE) - 1 wei;
uint public constant BPOW_PRECISION = BONE / 10**10;
uint public constant MAX_IN_RATIO = BONE / 2;
uint public constant MAX_OUT_RATIO = (BONE / 3) + 1 wei;
function btoi(uint a)
internal pure
returns (uint)
{
return a / BONE;
}
function bfloor(uint a)
internal pure
returns (uint)
{
return btoi(a) * BONE;
}
function badd(uint a, uint b)
internal pure
returns (uint)
{
uint c = a + b;
require(c >= a, "ERR_ADD_OVERFLOW");
return c;
}
function bsub(uint a, uint b)
internal pure
returns (uint)
{
(uint c, bool flag) = bsubSign(a, b);
require(!flag, "ERR_SUB_UNDERFLOW");
return c;
}
function bsubSign(uint a, uint b)
internal pure
returns (uint, bool)
{
if (a >= b) {
return (a - b, false);
} else {
return (b - a, true);
}
}
function bmul(uint a, uint b)
internal pure
returns (uint)
{
uint c0 = a * b;
require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW");
uint c1 = c0 + (BONE / 2);
require(c1 >= c0, "ERR_MUL_OVERFLOW");
uint c2 = c1 / BONE;
return c2;
}
function bdiv(uint a, uint b)
internal pure
returns (uint)
{
require(b != 0, "ERR_DIV_ZERO");
uint c0 = a * BONE;
require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow
uint c1 = c0 + (b / 2);
require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require
uint c2 = c1 / b;
return c2;
}
// DSMath.wpow
function bpowi(uint a, uint n)
internal pure
returns (uint)
{
uint z = n % 2 != 0 ? a : BONE;
for (n /= 2; n != 0; n /= 2) {
a = bmul(a, a);
if (n % 2 != 0) {
z = bmul(z, a);
}
}
return z;
}
// Compute b^(e.w) by splitting it into (b^e)*(b^0.w).
// Use `bpowi` for `b^e` and `bpowK` for k iterations
// of approximation of b^0.w
function bpow(uint base, uint exp)
internal pure
returns (uint)
{
require(base >= MIN_BPOW_BASE, "ERR_BPOW_BASE_TOO_LOW");
require(base <= MAX_BPOW_BASE, "ERR_BPOW_BASE_TOO_HIGH");
uint whole = bfloor(exp);
uint remain = bsub(exp, whole);
uint wholePow = bpowi(base, btoi(whole));
if (remain == 0) {
return wholePow;
}
uint partialResult = bpowApprox(base, remain, BPOW_PRECISION);
return bmul(wholePow, partialResult);
}
function bpowApprox(uint base, uint exp, uint precision)
internal pure
returns (uint)
{
// term 0:
uint a = exp;
(uint x, bool xneg) = bsubSign(base, BONE);
uint term = BONE;
uint sum = term;
bool negative = false;
// term(k) = numer / denom
// = (product(a - i - 1, i=1-->k) * x^k) / (k!)
// each iteration, multiply previous term by (a-(k-1)) * x / k
// continue until term is less than precision
for (uint i = 1; term >= precision; i++) {
uint bigK = i * BONE;
(uint c, bool cneg) = bsubSign(a, bsub(bigK, BONE));
term = bmul(term, bmul(c, x));
term = bdiv(term, bigK);
if (term == 0) break;
if (xneg) negative = !negative;
if (cneg) negative = !negative;
if (negative) {
sum = bsub(sum, term);
} else {
sum = badd(sum, term);
}
}
return sum;
}
/**********************************************************************************************
// calcSpotPrice //
// sP = spotPrice //
// bI = tokenBalanceIn ( bI / wI ) 1 //
// bO = tokenBalanceOut sP = ----------- * ---------- //
// wI = tokenWeightIn ( bO / wO ) ( 1 - sF ) //
// wO = tokenWeightOut //
// sF = swapFee //
**********************************************************************************************/
function calcSpotPrice(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint swapFee
)
internal pure
returns (uint spotPrice)
{
uint numer = bdiv(tokenBalanceIn, tokenWeightIn);
uint denom = bdiv(tokenBalanceOut, tokenWeightOut);
uint ratio = bdiv(numer, denom);
uint scale = bdiv(BONE, bsub(BONE, swapFee));
return (spotPrice = bmul(ratio, scale));
}
/**********************************************************************************************
// calcOutGivenIn //
// aO = tokenAmountOut //
// bO = tokenBalanceOut //
// bI = tokenBalanceIn / / bI \ (wI / wO) \ //
// aI = tokenAmountIn aO = bO * | 1 - | -------------------------- | ^ | //
// wI = tokenWeightIn \ \ ( bI + ( aI * ( 1 - sF )) / / //
// wO = tokenWeightOut //
// sF = swapFee //
**********************************************************************************************/
function calcOutGivenIn(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountIn,
uint swapFee
)
internal pure
returns (uint tokenAmountOut)
{
uint weightRatio = bdiv(tokenWeightIn, tokenWeightOut);
uint adjustedIn = bsub(BONE, swapFee);
adjustedIn = bmul(tokenAmountIn, adjustedIn);
uint y = bdiv(tokenBalanceIn, badd(tokenBalanceIn, adjustedIn));
if (y == 0) {
return 0;
}
uint foo = bpow(y, weightRatio);
uint bar = bsub(BONE, foo);
tokenAmountOut = bmul(tokenBalanceOut, bar);
return tokenAmountOut;
}
/**********************************************************************************************
// calcInGivenOut //
// aI = tokenAmountIn //
// bO = tokenBalanceOut / / bO \ (wO / wI) \ //
// bI = tokenBalanceIn bI * | | ------------ | ^ - 1 | //
// aO = tokenAmountOut aI = \ \ ( bO - aO ) / / //
// wI = tokenWeightIn -------------------------------------------- //
// wO = tokenWeightOut ( 1 - sF ) //
// sF = swapFee //
**********************************************************************************************/
function calcInGivenOut(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountOut,
uint swapFee
)
internal pure
returns (uint tokenAmountIn)
{
uint weightRatio = bdiv(tokenWeightOut, tokenWeightIn);
uint diff = bsub(tokenBalanceOut, tokenAmountOut);
uint y = bdiv(tokenBalanceOut, diff);
if (y == 0) {
return 0;
}
uint foo = bpow(y, weightRatio);
foo = bsub(foo, BONE);
tokenAmountIn = bsub(BONE, swapFee);
tokenAmountIn = bdiv(bmul(tokenBalanceIn, foo), tokenAmountIn);
return tokenAmountIn;
}
/**********************************************************************************************
// calcPoolOutGivenSingleIn //
// pAo = poolAmountOut / \ //
// tAi = tokenAmountIn /// / // wI \ \\ \ wI \ //
// wI = tokenWeightIn //| tAi *| 1 - || 1 - -- | * sF || + tBi \ -- \ //
// tW = totalWeight pAo=|| \ \ \\ tW / // | ^ tW | * pS - pS //
// tBi = tokenBalanceIn \\ ------------------------------------- / / //
// pS = poolSupply \\ tBi / / //
// sF = swapFee \ / //
**********************************************************************************************/
function calcPoolOutGivenSingleIn(
uint tokenBalanceIn,
uint tokenWeightIn,
uint poolSupply,
uint totalWeight,
uint tokenAmountIn,
uint swapFee
)
internal pure
returns (uint poolAmountOut)
{
// Charge the trading fee for the proportion of tokenAi
/// which is implicitly traded to the other pool tokens.
// That proportion is (1- weightTokenIn)
// tokenAiAfterFee = tAi * (1 - (1-weightTi) * poolFee);
uint normalizedWeight = bdiv(tokenWeightIn, totalWeight);
uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee);
uint tokenAmountInAfterFee = bmul(tokenAmountIn, bsub(BONE, zaz));
uint newTokenBalanceIn = badd(tokenBalanceIn, tokenAmountInAfterFee);
uint tokenInRatio = bdiv(newTokenBalanceIn, tokenBalanceIn);
// uint newPoolSupply = (ratioTi ^ weightTi) * poolSupply;
uint poolRatio = bpow(tokenInRatio, normalizedWeight);
uint newPoolSupply = bmul(poolRatio, poolSupply);
poolAmountOut = bsub(newPoolSupply, poolSupply);
return poolAmountOut;
}
/**********************************************************************************************
// calcSingleInGivenPoolOut //
// tAi = tokenAmountIn //(pS + pAo)\ / 1 \\ //
// pS = poolSupply || --------- | ^ | --------- || * bI - bI //
// pAo = poolAmountOut \\ pS / \(wI / tW)// //
// bI = balanceIn tAi = -------------------------------------------- //
// wI = weightIn / wI \ //
// tW = totalWeight | 1 - ---- | * sF //
// sF = swapFee \ tW / //
**********************************************************************************************/
function calcSingleInGivenPoolOut(
uint tokenBalanceIn,
uint tokenWeightIn,
uint poolSupply,
uint totalWeight,
uint poolAmountOut,
uint swapFee
)
internal pure
returns (uint tokenAmountIn)
{
uint normalizedWeight = bdiv(tokenWeightIn, totalWeight);
uint newPoolSupply = badd(poolSupply, poolAmountOut);
uint poolRatio = bdiv(newPoolSupply, poolSupply);
//uint newBalTi = poolRatio^(1/weightTi) * balTi;
uint boo = bdiv(BONE, normalizedWeight);
uint tokenInRatio = bpow(poolRatio, boo);
uint newTokenBalanceIn = bmul(tokenInRatio, tokenBalanceIn);
uint tokenAmountInAfterFee = bsub(newTokenBalanceIn, tokenBalanceIn);
// Do reverse order of fees charged in joinswap_ExternAmountIn, this way
// ``` pAo == joinswap_ExternAmountIn(Ti, joinswap_PoolAmountOut(pAo, Ti)) ```
//uint tAi = tAiAfterFee / (1 - (1-weightTi) * swapFee) ;
uint zar = bmul(bsub(BONE, normalizedWeight), swapFee);
tokenAmountIn = bdiv(tokenAmountInAfterFee, bsub(BONE, zar));
return tokenAmountIn;
}
/**********************************************************************************************
// calcSingleOutGivenPoolIn //
// tAo = tokenAmountOut / / \\ //
// bO = tokenBalanceOut / // pS - (pAi * (1 - eF)) \ / 1 \ \\ //
// pAi = poolAmountIn | bO - || ----------------------- | ^ | --------- | * b0 || //
// ps = poolSupply \ \\ pS / \(wO / tW)/ // //
// wI = tokenWeightIn tAo = \ \ // //
// tW = totalWeight / / wO \ \ //
// sF = swapFee * | 1 - | 1 - ---- | * sF | //
// eF = exitFee \ \ tW / / //
**********************************************************************************************/
function calcSingleOutGivenPoolIn(
uint tokenBalanceOut,
uint tokenWeightOut,
uint poolSupply,
uint totalWeight,
uint poolAmountIn,
uint swapFee
)
internal pure
returns (uint tokenAmountOut)
{
uint normalizedWeight = bdiv(tokenWeightOut, totalWeight);
// charge exit fee on the pool token side
// pAiAfterExitFee = pAi*(1-exitFee)
uint poolAmountInAfterExitFee = bmul(poolAmountIn, bsub(BONE, EXIT_FEE));
uint newPoolSupply = bsub(poolSupply, poolAmountInAfterExitFee);
uint poolRatio = bdiv(newPoolSupply, poolSupply);
// newBalTo = poolRatio^(1/weightTo) * balTo;
uint tokenOutRatio = bpow(poolRatio, bdiv(BONE, normalizedWeight));
uint newTokenBalanceOut = bmul(tokenOutRatio, tokenBalanceOut);
uint tokenAmountOutBeforeSwapFee = bsub(tokenBalanceOut, newTokenBalanceOut);
// charge swap fee on the output token side
//uint tAo = tAoBeforeSwapFee * (1 - (1-weightTo) * swapFee)
uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee);
tokenAmountOut = bmul(tokenAmountOutBeforeSwapFee, bsub(BONE, zaz));
return tokenAmountOut;
}
/**********************************************************************************************
// calcPoolInGivenSingleOut //
// pAi = poolAmountIn // / tAo \\ / wO \ \ //
// bO = tokenBalanceOut // | bO - -------------------------- |\ | ---- | \ //
// tAo = tokenAmountOut pS - || \ 1 - ((1 - (tO / tW)) * sF)/ | ^ \ tW / * pS | //
// ps = poolSupply \\ -----------------------------------/ / //
// wO = tokenWeightOut pAi = \\ bO / / //
// tW = totalWeight ------------------------------------------------------------- //
// sF = swapFee ( 1 - eF ) //
// eF = exitFee //
**********************************************************************************************/
function calcPoolInGivenSingleOut(
uint tokenBalanceOut,
uint tokenWeightOut,
uint poolSupply,
uint totalWeight,
uint tokenAmountOut,
uint swapFee
)
internal pure
returns (uint poolAmountIn)
{
// charge swap fee on the output token side
uint normalizedWeight = bdiv(tokenWeightOut, totalWeight);
//uint tAoBeforeSwapFee = tAo / (1 - (1-weightTo) * swapFee) ;
uint zoo = bsub(BONE, normalizedWeight);
uint zar = bmul(zoo, swapFee);
uint tokenAmountOutBeforeSwapFee = bdiv(tokenAmountOut, bsub(BONE, zar));
uint newTokenBalanceOut = bsub(tokenBalanceOut, tokenAmountOutBeforeSwapFee);
uint tokenOutRatio = bdiv(newTokenBalanceOut, tokenBalanceOut);
//uint newPoolSupply = (ratioTo ^ weightTo) * poolSupply;
uint poolRatio = bpow(tokenOutRatio, normalizedWeight);
uint newPoolSupply = bmul(poolRatio, poolSupply);
uint poolAmountInAfterExitFee = bsub(poolSupply, newPoolSupply);
// charge exit fee on the pool token side
// pAi = pAiAfterExitFee/(1-exitFee)
poolAmountIn = bdiv(poolAmountInAfterExitFee, bsub(BONE, EXIT_FEE));
return poolAmountIn;
}
}
// File: contracts/OneSplitBase.sol
pragma solidity ^0.5.0;
contract IOneSplitView is IOneSplitConsts {
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
);
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
);
}
library DisableFlags {
function check(uint256 flags, uint256 flag) internal pure returns(bool) {
return (flags & flag) != 0;
}
}
contract OneSplitRoot is IOneSplitView {
using SafeMath for uint256;
using DisableFlags for uint256;
using UniversalERC20 for IERC20;
using UniversalERC20 for IWETH;
using UniswapV2ExchangeLib for IUniswapV2Exchange;
using ChaiHelper for IChai;
uint256 constant internal DEXES_COUNT = 34;
IERC20 constant internal ETH_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
IERC20 constant internal ZERO_ADDRESS = IERC20(0);
IBancorEtherToken constant internal bancorEtherToken = IBancorEtherToken(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IWETH constant internal weth = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
IChai constant internal chai = IChai(0x06AF07097C9Eeb7fD685c692751D5C66dB49c215);
IERC20 constant internal dai = IERC20(0x6B175474E89094C44Da98b954EedeAC495271d0F);
IERC20 constant internal usdc = IERC20(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48);
IERC20 constant internal usdt = IERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7);
IERC20 constant internal tusd = IERC20(0x0000000000085d4780B73119b644AE5ecd22b376);
IERC20 constant internal busd = IERC20(0x4Fabb145d64652a948d72533023f6E7A623C7C53);
IERC20 constant internal susd = IERC20(0x57Ab1ec28D129707052df4dF418D58a2D46d5f51);
IERC20 constant internal pax = IERC20(0x8E870D67F660D95d5be530380D0eC0bd388289E1);
IERC20 constant internal renbtc = IERC20(0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D);
IERC20 constant internal wbtc = IERC20(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
IERC20 constant internal tbtc = IERC20(0x1bBE271d15Bb64dF0bc6CD28Df9Ff322F2eBD847);
IERC20 constant internal hbtc = IERC20(0x0316EB71485b0Ab14103307bf65a021042c6d380);
IERC20 constant internal sbtc = IERC20(0xfE18be6b3Bd88A2D2A7f928d00292E7a9963CfC6);
IKyberNetworkProxy constant internal kyberNetworkProxy = IKyberNetworkProxy(0x9AAb3f75489902f3a48495025729a0AF77d4b11e);
IKyberStorage constant internal kyberStorage = IKyberStorage(0xC8fb12402cB16970F3C5F4b48Ff68Eb9D1289301);
IKyberHintHandler constant internal kyberHintHandler = IKyberHintHandler(0xa1C0Fa73c39CFBcC11ec9Eb1Afc665aba9996E2C);
IUniswapFactory constant internal uniswapFactory = IUniswapFactory(0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95);
IBancorContractRegistry constant internal bancorContractRegistry = IBancorContractRegistry(0x52Ae12ABe5D8BD778BD5397F99cA900624CfADD4);
IBancorNetworkPathFinder constant internal bancorNetworkPathFinder = IBancorNetworkPathFinder(0x6F0cD8C4f6F06eAB664C7E3031909452b4B72861);
//IBancorConverterRegistry constant internal bancorConverterRegistry = IBancorConverterRegistry(0xf6E2D7F616B67E46D708e4410746E9AAb3a4C518);
IBancorFinder constant internal bancorFinder = IBancorFinder(0x2B344e14dc2641D11D338C053C908c7A7D4c30B9);
IOasisExchange constant internal oasisExchange = IOasisExchange(0x794e6e91555438aFc3ccF1c5076A74F42133d08D);
ICurve constant internal curveCompound = ICurve(0xA2B47E3D5c44877cca798226B7B8118F9BFb7A56);
ICurve constant internal curveUSDT = ICurve(0x52EA46506B9CC5Ef470C5bf89f17Dc28bB35D85C);
ICurve constant internal curveY = ICurve(0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51);
ICurve constant internal curveBinance = ICurve(0x79a8C46DeA5aDa233ABaFFD40F3A0A2B1e5A4F27);
ICurve constant internal curveSynthetix = ICurve(0xA5407eAE9Ba41422680e2e00537571bcC53efBfD);
ICurve constant internal curvePAX = ICurve(0x06364f10B501e868329afBc005b3492902d6C763);
ICurve constant internal curveRenBTC = ICurve(0x93054188d876f558f4a66B2EF1d97d16eDf0895B);
ICurve constant internal curveTBTC = ICurve(0x9726e9314eF1b96E45f40056bEd61A088897313E);
ICurve constant internal curveSBTC = ICurve(0x7fC77b5c7614E1533320Ea6DDc2Eb61fa00A9714);
IShell constant internal shell = IShell(0xA8253a440Be331dC4a7395B73948cCa6F19Dc97D);
IAaveLendingPool constant internal aave = IAaveLendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119);
ICompound constant internal compound = ICompound(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
ICompoundEther constant internal cETH = ICompoundEther(0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5);
IMooniswapRegistry constant internal mooniswapRegistry = IMooniswapRegistry(0xc12A7e093832E2d2267df225BAca60bD2B74C65F);
IUniswapV2Factory constant internal uniswapV2 = IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
IDForceSwap constant internal dforceSwap = IDForceSwap(0x03eF3f37856bD08eb47E2dE7ABc4Ddd2c19B60F2);
IMStable constant internal musd = IMStable(0xe2f2a5C287993345a840Db3B0845fbC70f5935a5);
IMassetValidationHelper constant internal musd_helper = IMassetValidationHelper(0xaBcC93c3be238884cc3309C19Afd128fAfC16911);
IBalancerRegistry constant internal balancerRegistry = IBalancerRegistry(0x65e67cbc342712DF67494ACEfc06fe951EE93982);
ICurveCalculator constant internal curveCalculator = ICurveCalculator(0xc1DB00a8E5Ef7bfa476395cdbcc98235477cDE4E);
ICurveRegistry constant internal curveRegistry = ICurveRegistry(0x7002B727Ef8F5571Cb5F9D70D13DBEEb4dFAe9d1);
ICompoundRegistry constant internal compoundRegistry = ICompoundRegistry(0xF451Dbd7Ba14BFa7B1B78A766D3Ed438F79EE1D1);
IAaveRegistry constant internal aaveRegistry = IAaveRegistry(0xEd8b133B7B88366E01Bb9E38305Ab11c26521494);
IBalancerHelper constant internal balancerHelper = IBalancerHelper(0xA961672E8Db773be387e775bc4937C678F3ddF9a);
int256 internal constant VERY_NEGATIVE_VALUE = -1e72;
function _findBestDistribution(
uint256 s, // parts
int256[][] memory amounts // exchangesReturns
)
internal
pure
returns(
int256 returnAmount,
uint256[] memory distribution
)
{
uint256 n = amounts.length;
int256[][] memory answer = new int256[][](n); // int[n][s+1]
uint256[][] memory parent = new uint256[][](n); // int[n][s+1]
for (uint i = 0; i < n; i++) {
answer[i] = new int256[](s + 1);
parent[i] = new uint256[](s + 1);
}
for (uint j = 0; j <= s; j++) {
answer[0][j] = amounts[0][j];
for (uint i = 1; i < n; i++) {
answer[i][j] = -1e72;
}
parent[0][j] = 0;
}
for (uint i = 1; i < n; i++) {
for (uint j = 0; j <= s; j++) {
answer[i][j] = answer[i - 1][j];
parent[i][j] = j;
for (uint k = 1; k <= j; k++) {
if (answer[i - 1][j - k] + amounts[i][k] > answer[i][j]) {
answer[i][j] = answer[i - 1][j - k] + amounts[i][k];
parent[i][j] = j - k;
}
}
}
}
distribution = new uint256[](DEXES_COUNT);
uint256 partsLeft = s;
for (uint curExchange = n - 1; partsLeft > 0; curExchange--) {
distribution[curExchange] = partsLeft - parent[curExchange][partsLeft];
partsLeft = parent[curExchange][partsLeft];
}
returnAmount = (answer[n - 1][s] == VERY_NEGATIVE_VALUE) ? 0 : answer[n - 1][s];
}
function _kyberReserveIdByTokens(
IERC20 fromToken,
IERC20 destToken
) internal view returns(bytes32) {
if (!fromToken.isETH() && !destToken.isETH()) {
return 0;
}
bytes32[] memory reserveIds = kyberStorage.getReserveIdsPerTokenSrc(
fromToken.isETH() ? destToken : fromToken
);
for (uint i = 0; i < reserveIds.length; i++) {
if ((uint256(reserveIds[i]) >> 248) != 0xBB && // Bridge
reserveIds[i] != 0xff4b796265722046707200000000000000000000000000000000000000000000 && // Reserve 1
reserveIds[i] != 0xffabcd0000000000000000000000000000000000000000000000000000000000 && // Reserve 2
reserveIds[i] != 0xff4f6e65426974205175616e7400000000000000000000000000000000000000) // Reserve 3
{
return reserveIds[i];
}
}
return 0;
}
function _scaleDestTokenEthPriceTimesGasPrice(
IERC20 fromToken,
IERC20 destToken,
uint256 destTokenEthPriceTimesGasPrice
) internal view returns(uint256) {
if (fromToken == destToken) {
return destTokenEthPriceTimesGasPrice;
}
uint256 mul = _cheapGetPrice(ETH_ADDRESS, destToken, 0.01 ether);
uint256 div = _cheapGetPrice(ETH_ADDRESS, fromToken, 0.01 ether);
if (div > 0) {
return destTokenEthPriceTimesGasPrice.mul(mul).div(div);
}
return 0;
}
function _cheapGetPrice(
IERC20 fromToken,
IERC20 destToken,
uint256 amount
) internal view returns(uint256 returnAmount) {
(returnAmount,,) = this.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
1,
FLAG_DISABLE_SPLIT_RECALCULATION |
FLAG_DISABLE_ALL_SPLIT_SOURCES |
FLAG_DISABLE_UNISWAP_V2_ALL |
FLAG_DISABLE_UNISWAP,
0
);
}
function _linearInterpolation(
uint256 value,
uint256 parts
) internal pure returns(uint256[] memory rets) {
rets = new uint256[](parts);
for (uint i = 0; i < parts; i++) {
rets[i] = value.mul(i + 1).div(parts);
}
}
function _tokensEqual(IERC20 tokenA, IERC20 tokenB) internal pure returns(bool) {
return ((tokenA.isETH() && tokenB.isETH()) || tokenA == tokenB);
}
}
contract OneSplitViewWrapBase is IOneSplitView, OneSplitRoot {
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags // See constants in IOneSplit.sol
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, , distribution) = this.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
0
);
}
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _getExpectedReturnRespectingGasFloor(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _getExpectedReturnRespectingGasFloor(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags, // See constants in IOneSplit.sol
uint256 destTokenEthPriceTimesGasPrice
)
internal
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
);
}
contract OneSplitView is IOneSplitView, OneSplitRoot {
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags // See constants in IOneSplit.sol
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, , distribution) = getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
0
);
}
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags, // See constants in IOneSplit.sol
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
distribution = new uint256[](DEXES_COUNT);
if (fromToken == destToken) {
return (amount, 0, distribution);
}
function(IERC20,IERC20,uint256,uint256,uint256) view returns(uint256[] memory, uint256)[DEXES_COUNT] memory reserves = _getAllReserves(flags);
int256[][] memory matrix = new int256[][](DEXES_COUNT);
uint256[DEXES_COUNT] memory gases;
bool atLeastOnePositive = false;
for (uint i = 0; i < DEXES_COUNT; i++) {
uint256[] memory rets;
(rets, gases[i]) = reserves[i](fromToken, destToken, amount, parts, flags);
// Prepend zero and sub gas
int256 gas = int256(gases[i].mul(destTokenEthPriceTimesGasPrice).div(1e18));
matrix[i] = new int256[](parts + 1);
for (uint j = 0; j < rets.length; j++) {
matrix[i][j + 1] = int256(rets[j]) - gas;
atLeastOnePositive = atLeastOnePositive || (matrix[i][j + 1] > 0);
}
}
if (!atLeastOnePositive) {
for (uint i = 0; i < DEXES_COUNT; i++) {
for (uint j = 1; j < parts + 1; j++) {
if (matrix[i][j] == 0) {
matrix[i][j] = VERY_NEGATIVE_VALUE;
}
}
}
}
(, distribution) = _findBestDistribution(parts, matrix);
(returnAmount, estimateGasAmount) = _getReturnAndGasByDistribution(
Args({
fromToken: fromToken,
destToken: destToken,
amount: amount,
parts: parts,
flags: flags,
destTokenEthPriceTimesGasPrice: destTokenEthPriceTimesGasPrice,
distribution: distribution,
matrix: matrix,
gases: gases,
reserves: reserves
})
);
return (returnAmount, estimateGasAmount, distribution);
}
struct Args {
IERC20 fromToken;
IERC20 destToken;
uint256 amount;
uint256 parts;
uint256 flags;
uint256 destTokenEthPriceTimesGasPrice;
uint256[] distribution;
int256[][] matrix;
uint256[DEXES_COUNT] gases;
function(IERC20,IERC20,uint256,uint256,uint256) view returns(uint256[] memory, uint256)[DEXES_COUNT] reserves;
}
function _getReturnAndGasByDistribution(
Args memory args
) internal view returns(uint256 returnAmount, uint256 estimateGasAmount) {
bool[DEXES_COUNT] memory exact = [
true, // "Uniswap",
false, // "Kyber",
false, // "Bancor",
false, // "Oasis",
true, // "Curve Compound",
true, // "Curve USDT",
true, // "Curve Y",
true, // "Curve Binance",
true, // "Curve Synthetix",
true, // "Uniswap Compound",
true, // "Uniswap CHAI",
true, // "Uniswap Aave",
true, // "Mooniswap 1",
true, // "Uniswap V2",
true, // "Uniswap V2 (ETH)",
true, // "Uniswap V2 (DAI)",
true, // "Uniswap V2 (USDC)",
true, // "Curve Pax",
true, // "Curve RenBTC",
true, // "Curve tBTC",
true, // "Dforce XSwap",
false, // "Shell",
true, // "mStable",
true, // "Curve sBTC"
true, // "Balancer 1"
true, // "Balancer 2"
true, // "Balancer 3"
true, // "Kyber 1"
true, // "Kyber 2"
true, // "Kyber 3"
true, // "Kyber 4"
true, // "Mooniswap 2"
true, // "Mooniswap 3"
true // "Mooniswap 4"
];
for (uint i = 0; i < DEXES_COUNT; i++) {
if (args.distribution[i] > 0) {
if (args.distribution[i] == args.parts || exact[i] || args.flags.check(FLAG_DISABLE_SPLIT_RECALCULATION)) {
estimateGasAmount = estimateGasAmount.add(args.gases[i]);
int256 value = args.matrix[i][args.distribution[i]];
returnAmount = returnAmount.add(uint256(
(value == VERY_NEGATIVE_VALUE ? 0 : value) +
int256(args.gases[i].mul(args.destTokenEthPriceTimesGasPrice).div(1e18))
));
}
else {
(uint256[] memory rets, uint256 gas) = args.reserves[i](args.fromToken, args.destToken, args.amount.mul(args.distribution[i]).div(args.parts), 1, args.flags);
estimateGasAmount = estimateGasAmount.add(gas);
returnAmount = returnAmount.add(rets[0]);
}
}
}
}
function _getAllReserves(uint256 flags)
internal
pure
returns(function(IERC20,IERC20,uint256,uint256,uint256) view returns(uint256[] memory, uint256)[DEXES_COUNT] memory)
{
bool invert = flags.check(FLAG_DISABLE_ALL_SPLIT_SOURCES);
return [
invert != flags.check(FLAG_DISABLE_UNISWAP_ALL | FLAG_DISABLE_UNISWAP) ? _calculateNoReturn : calculateUniswap,
_calculateNoReturn, // invert != flags.check(FLAG_DISABLE_KYBER) ? _calculateNoReturn : calculateKyber,
invert != flags.check(FLAG_DISABLE_BANCOR) ? _calculateNoReturn : calculateBancor,
invert != flags.check(FLAG_DISABLE_OASIS) ? _calculateNoReturn : calculateOasis,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_COMPOUND) ? _calculateNoReturn : calculateCurveCompound,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_USDT) ? _calculateNoReturn : calculateCurveUSDT,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_Y) ? _calculateNoReturn : calculateCurveY,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_BINANCE) ? _calculateNoReturn : calculateCurveBinance,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_SYNTHETIX) ? _calculateNoReturn : calculateCurveSynthetix,
invert != flags.check(FLAG_DISABLE_UNISWAP_ALL | FLAG_DISABLE_UNISWAP_COMPOUND) ? _calculateNoReturn : calculateUniswapCompound,
invert != flags.check(FLAG_DISABLE_UNISWAP_ALL | FLAG_DISABLE_UNISWAP_CHAI) ? _calculateNoReturn : calculateUniswapChai,
invert != flags.check(FLAG_DISABLE_UNISWAP_ALL | FLAG_DISABLE_UNISWAP_AAVE) ? _calculateNoReturn : calculateUniswapAave,
invert != flags.check(FLAG_DISABLE_MOONISWAP_ALL | FLAG_DISABLE_MOONISWAP) ? _calculateNoReturn : calculateMooniswap,
invert != flags.check(FLAG_DISABLE_UNISWAP_V2_ALL | FLAG_DISABLE_UNISWAP_V2) ? _calculateNoReturn : calculateUniswapV2,
invert != flags.check(FLAG_DISABLE_UNISWAP_V2_ALL | FLAG_DISABLE_UNISWAP_V2_ETH) ? _calculateNoReturn : calculateUniswapV2ETH,
invert != flags.check(FLAG_DISABLE_UNISWAP_V2_ALL | FLAG_DISABLE_UNISWAP_V2_DAI) ? _calculateNoReturn : calculateUniswapV2DAI,
invert != flags.check(FLAG_DISABLE_UNISWAP_V2_ALL | FLAG_DISABLE_UNISWAP_V2_USDC) ? _calculateNoReturn : calculateUniswapV2USDC,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_PAX) ? _calculateNoReturn : calculateCurvePAX,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_RENBTC) ? _calculateNoReturn : calculateCurveRenBTC,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_TBTC) ? _calculateNoReturn : calculateCurveTBTC,
invert != flags.check(FLAG_DISABLE_DFORCE_SWAP) ? _calculateNoReturn : calculateDforceSwap,
invert != flags.check(FLAG_DISABLE_SHELL) ? _calculateNoReturn : calculateShell,
invert != flags.check(FLAG_DISABLE_MSTABLE_MUSD) ? _calculateNoReturn : calculateMStableMUSD,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_SBTC) ? _calculateNoReturn : calculateCurveSBTC,
invert != flags.check(FLAG_DISABLE_BALANCER_ALL | FLAG_DISABLE_BALANCER_1) ? _calculateNoReturn : calculateBalancer1,
invert != flags.check(FLAG_DISABLE_BALANCER_ALL | FLAG_DISABLE_BALANCER_2) ? _calculateNoReturn : calculateBalancer2,
invert != flags.check(FLAG_DISABLE_BALANCER_ALL | FLAG_DISABLE_BALANCER_3) ? _calculateNoReturn : calculateBalancer3,
invert != flags.check(FLAG_DISABLE_KYBER_ALL | FLAG_DISABLE_KYBER_1) ? _calculateNoReturn : calculateKyber1,
invert != flags.check(FLAG_DISABLE_KYBER_ALL | FLAG_DISABLE_KYBER_2) ? _calculateNoReturn : calculateKyber2,
invert != flags.check(FLAG_DISABLE_KYBER_ALL | FLAG_DISABLE_KYBER_3) ? _calculateNoReturn : calculateKyber3,
invert != flags.check(FLAG_DISABLE_KYBER_ALL | FLAG_DISABLE_KYBER_4) ? _calculateNoReturn : calculateKyber4,
invert != flags.check(FLAG_DISABLE_MOONISWAP_ALL | FLAG_DISABLE_MOONISWAP_ETH) ? _calculateNoReturn : calculateMooniswapOverETH,
invert != flags.check(FLAG_DISABLE_MOONISWAP_ALL | FLAG_DISABLE_MOONISWAP_DAI) ? _calculateNoReturn : calculateMooniswapOverDAI,
invert != flags.check(FLAG_DISABLE_MOONISWAP_ALL | FLAG_DISABLE_MOONISWAP_USDC) ? _calculateNoReturn : calculateMooniswapOverUSDC
];
}
function _calculateNoGas(
IERC20 /*fromToken*/,
IERC20 /*destToken*/,
uint256 /*amount*/,
uint256 /*parts*/,
uint256 /*destTokenEthPriceTimesGasPrice*/,
uint256 /*flags*/,
uint256 /*destTokenEthPrice*/
) internal view returns(uint256[] memory /*rets*/, uint256 /*gas*/) {
this;
}
// View Helpers
struct Balances {
uint256 src;
uint256 dst;
}
function _calculateBalancer(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 poolIndex
) internal view returns(uint256[] memory rets, uint256 gas) {
address[] memory pools = balancerRegistry.getBestPoolsWithLimit(
address(fromToken.isETH() ? weth : fromToken),
address(destToken.isETH() ? weth : destToken),
poolIndex + 1
);
if (poolIndex >= pools.length) {
return (new uint256[](parts), 0);
}
rets = balancerHelper.getReturns(
IBalancerPool(pools[poolIndex]),
fromToken.isETH() ? weth : fromToken,
destToken.isETH() ? weth : destToken,
_linearInterpolation(amount, parts)
);
gas = 75_000 + (fromToken.isETH() || destToken.isETH() ? 0 : 65_000);
}
function calculateBalancer1(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateBalancer(
fromToken,
destToken,
amount,
parts,
0
);
}
function calculateBalancer2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateBalancer(
fromToken,
destToken,
amount,
parts,
1
);
}
function calculateBalancer3(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateBalancer(
fromToken,
destToken,
amount,
parts,
2
);
}
function calculateMStableMUSD(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = new uint256[](parts);
if ((fromToken != usdc && fromToken != dai && fromToken != usdt && fromToken != tusd) ||
(destToken != usdc && destToken != dai && destToken != usdt && destToken != tusd))
{
return (rets, 0);
}
for (uint i = 1; i <= parts; i *= 2) {
(bool success, bytes memory data) = address(musd).staticcall(abi.encodeWithSelector(
musd.getSwapOutput.selector,
fromToken,
destToken,
amount.mul(parts.div(i)).div(parts)
));
if (success && data.length > 0) {
(,, uint256 maxRet) = abi.decode(data, (bool,string,uint256));
if (maxRet > 0) {
for (uint j = 0; j < parts.div(i); j++) {
rets[j] = maxRet.mul(j + 1).div(parts.div(i));
}
break;
}
}
}
return (
rets,
700_000
);
}
function _getCurvePoolInfo(
ICurve curve,
bool haveUnderlying
) internal view returns(
uint256[8] memory balances,
uint256[8] memory precisions,
uint256[8] memory rates,
uint256 amp,
uint256 fee
) {
uint256[8] memory underlying_balances;
uint256[8] memory decimals;
uint256[8] memory underlying_decimals;
(
balances,
underlying_balances,
decimals,
underlying_decimals,
/*address lp_token*/,
amp,
fee
) = curveRegistry.get_pool_info(address(curve));
for (uint k = 0; k < 8 && balances[k] > 0; k++) {
precisions[k] = 10 ** (18 - (haveUnderlying ? underlying_decimals : decimals)[k]);
if (haveUnderlying) {
rates[k] = underlying_balances[k].mul(1e18).div(balances[k]);
} else {
rates[k] = 1e18;
}
}
}
function _calculateCurveSelector(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
ICurve curve,
bool haveUnderlying,
IERC20[] memory tokens
) internal view returns(uint256[] memory rets) {
rets = new uint256[](parts);
int128 i = 0;
int128 j = 0;
for (uint t = 0; t < tokens.length; t++) {
if (fromToken == tokens[t]) {
i = int128(t + 1);
}
if (destToken == tokens[t]) {
j = int128(t + 1);
}
}
if (i == 0 || j == 0) {
return rets;
}
bytes memory data = abi.encodePacked(
uint256(haveUnderlying ? 1 : 0),
uint256(i - 1),
uint256(j - 1),
_linearInterpolation100(amount, parts)
);
(
uint256[8] memory balances,
uint256[8] memory precisions,
uint256[8] memory rates,
uint256 amp,
uint256 fee
) = _getCurvePoolInfo(curve, haveUnderlying);
bool success;
(success, data) = address(curveCalculator).staticcall(
abi.encodePacked(
abi.encodeWithSelector(
curveCalculator.get_dy.selector,
tokens.length,
balances,
amp,
fee,
rates,
precisions
),
data
)
);
if (!success || data.length == 0) {
return rets;
}
uint256[100] memory dy = abi.decode(data, (uint256[100]));
for (uint t = 0; t < parts; t++) {
rets[t] = dy[t];
}
}
function _linearInterpolation100(
uint256 value,
uint256 parts
) internal pure returns(uint256[100] memory rets) {
for (uint i = 0; i < parts; i++) {
rets[i] = value.mul(i + 1).div(parts);
}
}
function calculateCurveCompound(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](2);
tokens[0] = dai;
tokens[1] = usdc;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveCompound,
true,
tokens
), 720_000);
}
function calculateCurveUSDT(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](3);
tokens[0] = dai;
tokens[1] = usdc;
tokens[2] = usdt;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveUSDT,
true,
tokens
), 720_000);
}
function calculateCurveY(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](4);
tokens[0] = dai;
tokens[1] = usdc;
tokens[2] = usdt;
tokens[3] = tusd;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveY,
true,
tokens
), 1_400_000);
}
function calculateCurveBinance(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](4);
tokens[0] = dai;
tokens[1] = usdc;
tokens[2] = usdt;
tokens[3] = busd;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveBinance,
true,
tokens
), 1_400_000);
}
function calculateCurveSynthetix(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](4);
tokens[0] = dai;
tokens[1] = usdc;
tokens[2] = usdt;
tokens[3] = susd;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveSynthetix,
true,
tokens
), 200_000);
}
function calculateCurvePAX(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](4);
tokens[0] = dai;
tokens[1] = usdc;
tokens[2] = usdt;
tokens[3] = pax;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curvePAX,
true,
tokens
), 1_000_000);
}
function calculateCurveRenBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](2);
tokens[0] = renbtc;
tokens[1] = wbtc;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveRenBTC,
false,
tokens
), 130_000);
}
function calculateCurveTBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](3);
tokens[0] = tbtc;
tokens[1] = wbtc;
tokens[2] = hbtc;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveTBTC,
false,
tokens
), 145_000);
}
function calculateCurveSBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20[] memory tokens = new IERC20[](3);
tokens[0] = renbtc;
tokens[1] = wbtc;
tokens[2] = sbtc;
return (_calculateCurveSelector(
fromToken,
destToken,
amount,
parts,
curveSBTC,
false,
tokens
), 150_000);
}
function calculateShell(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
(bool success, bytes memory data) = address(shell).staticcall(abi.encodeWithSelector(
shell.viewOriginTrade.selector,
fromToken,
destToken,
amount
));
if (!success || data.length == 0) {
return (new uint256[](parts), 0);
}
uint256 maxRet = abi.decode(data, (uint256));
return (_linearInterpolation(maxRet, parts), 300_000);
}
function calculateDforceSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
(bool success, bytes memory data) = address(dforceSwap).staticcall(
abi.encodeWithSelector(
dforceSwap.getAmountByInput.selector,
fromToken,
destToken,
amount
)
);
if (!success || data.length == 0) {
return (new uint256[](parts), 0);
}
uint256 maxRet = abi.decode(data, (uint256));
uint256 available = destToken.universalBalanceOf(address(dforceSwap));
if (maxRet > available) {
return (new uint256[](parts), 0);
}
return (_linearInterpolation(maxRet, parts), 160_000);
}
function _calculateUniswapFormula(uint256 fromBalance, uint256 toBalance, uint256 amount) internal pure returns(uint256) {
if (amount == 0) {
return 0;
}
return amount.mul(toBalance).mul(997).div(
fromBalance.mul(1000).add(amount.mul(997))
);
}
function _calculateUniswap(
IERC20 fromToken,
IERC20 destToken,
uint256[] memory amounts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = amounts;
if (!fromToken.isETH()) {
IUniswapExchange fromExchange = uniswapFactory.getExchange(fromToken);
if (fromExchange == IUniswapExchange(0)) {
return (new uint256[](rets.length), 0);
}
uint256 fromTokenBalance = fromToken.universalBalanceOf(address(fromExchange));
uint256 fromEtherBalance = address(fromExchange).balance;
for (uint i = 0; i < rets.length; i++) {
rets[i] = _calculateUniswapFormula(fromTokenBalance, fromEtherBalance, rets[i]);
}
}
if (!destToken.isETH()) {
IUniswapExchange toExchange = uniswapFactory.getExchange(destToken);
if (toExchange == IUniswapExchange(0)) {
return (new uint256[](rets.length), 0);
}
uint256 toEtherBalance = address(toExchange).balance;
uint256 toTokenBalance = destToken.universalBalanceOf(address(toExchange));
for (uint i = 0; i < rets.length; i++) {
rets[i] = _calculateUniswapFormula(toEtherBalance, toTokenBalance, rets[i]);
}
}
return (rets, fromToken.isETH() || destToken.isETH() ? 60_000 : 100_000);
}
function calculateUniswap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateUniswap(
fromToken,
destToken,
_linearInterpolation(amount, parts),
flags
);
}
function _calculateUniswapWrapped(
IERC20 fromToken,
IERC20 midToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 midTokenPrice,
uint256 flags,
uint256 gas1,
uint256 gas2
) internal view returns(uint256[] memory rets, uint256 gas) {
if (!fromToken.isETH() && destToken.isETH()) {
(rets, gas) = _calculateUniswap(
midToken,
destToken,
_linearInterpolation(amount.mul(1e18).div(midTokenPrice), parts),
flags
);
return (rets, gas + gas1);
}
else if (fromToken.isETH() && !destToken.isETH()) {
(rets, gas) = _calculateUniswap(
fromToken,
midToken,
_linearInterpolation(amount, parts),
flags
);
for (uint i = 0; i < parts; i++) {
rets[i] = rets[i].mul(midTokenPrice).div(1e18);
}
return (rets, gas + gas2);
}
return (new uint256[](parts), 0);
}
function calculateUniswapCompound(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20 midPreToken;
if (!fromToken.isETH() && destToken.isETH()) {
midPreToken = fromToken;
}
else if (!destToken.isETH() && fromToken.isETH()) {
midPreToken = destToken;
}
if (!midPreToken.isETH()) {
ICompoundToken midToken = compoundRegistry.cTokenByToken(midPreToken);
if (midToken != ICompoundToken(0)) {
return _calculateUniswapWrapped(
fromToken,
midToken,
destToken,
amount,
parts,
midToken.exchangeRateStored(),
flags,
200_000,
200_000
);
}
}
return (new uint256[](parts), 0);
}
function calculateUniswapChai(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken == dai && destToken.isETH() ||
fromToken.isETH() && destToken == dai)
{
return _calculateUniswapWrapped(
fromToken,
chai,
destToken,
amount,
parts,
chai.chaiPrice(),
flags,
180_000,
160_000
);
}
return (new uint256[](parts), 0);
}
function calculateUniswapAave(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
IERC20 midPreToken;
if (!fromToken.isETH() && destToken.isETH()) {
midPreToken = fromToken;
}
else if (!destToken.isETH() && fromToken.isETH()) {
midPreToken = destToken;
}
if (!midPreToken.isETH()) {
IAaveToken midToken = aaveRegistry.aTokenByToken(midPreToken);
if (midToken != IAaveToken(0)) {
return _calculateUniswapWrapped(
fromToken,
midToken,
destToken,
amount,
parts,
1e18,
flags,
310_000,
670_000
);
}
}
return (new uint256[](parts), 0);
}
function calculateKyber1(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateKyber(
fromToken,
destToken,
amount,
parts,
flags,
0xff4b796265722046707200000000000000000000000000000000000000000000 // 0x63825c174ab367968EC60f061753D3bbD36A0D8F
);
}
function calculateKyber2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateKyber(
fromToken,
destToken,
amount,
parts,
flags,
0xffabcd0000000000000000000000000000000000000000000000000000000000 // 0x7a3370075a54B187d7bD5DceBf0ff2B5552d4F7D
);
}
function calculateKyber3(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateKyber(
fromToken,
destToken,
amount,
parts,
flags,
0xff4f6e65426974205175616e7400000000000000000000000000000000000000 // 0x4f32BbE8dFc9efD54345Fc936f9fEF1048746fCF
);
}
function calculateKyber4(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
bytes32 reserveId = _kyberReserveIdByTokens(fromToken, destToken);
if (reserveId == 0) {
return (new uint256[](parts), 0);
}
return _calculateKyber(
fromToken,
destToken,
amount,
parts,
flags,
reserveId
);
}
function _kyberGetRate(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/,
bytes memory hint
) private view returns(uint256) {
(, bytes memory data) = address(kyberNetworkProxy).staticcall(
abi.encodeWithSelector(
kyberNetworkProxy.getExpectedRateAfterFee.selector,
fromToken,
destToken,
amount,
10,
hint
)
);
return (data.length == 32) ? abi.decode(data, (uint256)) : 0;
}
function _calculateKyber(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
bytes32 reserveId
) internal view returns(uint256[] memory rets, uint256 gas) {
bytes memory fromHint;
bytes memory destHint;
{
bytes32[] memory reserveIds = new bytes32[](1);
reserveIds[0] = reserveId;
(bool success, bytes memory data) = address(kyberHintHandler).staticcall(
abi.encodeWithSelector(
kyberHintHandler.buildTokenToEthHint.selector,
fromToken,
IKyberHintHandler.TradeType.MaskIn,
reserveIds,
new uint256[](0)
)
);
fromHint = success ? abi.decode(data, (bytes)) : bytes("");
(success, data) = address(kyberHintHandler).staticcall(
abi.encodeWithSelector(
kyberHintHandler.buildEthToTokenHint.selector,
destToken,
IKyberHintHandler.TradeType.MaskIn,
reserveIds,
new uint256[](0)
)
);
destHint = success ? abi.decode(data, (bytes)) : bytes("");
}
uint256 fromTokenDecimals = 10 ** IERC20(fromToken).universalDecimals();
uint256 destTokenDecimals = 10 ** IERC20(destToken).universalDecimals();
rets = new uint256[](parts);
for (uint i = 0; i < parts; i++) {
if (i > 0 && rets[i - 1] == 0) {
break;
}
rets[i] = amount.mul(i + 1).div(parts);
if (!fromToken.isETH()) {
if (fromHint.length == 0) {
rets[i] = 0;
break;
}
uint256 rate = _kyberGetRate(
fromToken,
ETH_ADDRESS,
rets[i],
flags,
fromHint
);
rets[i] = rate.mul(rets[i]).div(fromTokenDecimals);
}
if (!destToken.isETH() && rets[i] > 0) {
if (destHint.length == 0) {
rets[i] = 0;
break;
}
uint256 rate = _kyberGetRate(
ETH_ADDRESS,
destToken,
rets[i],
10,
destHint
);
rets[i] = rate.mul(rets[i]).mul(destTokenDecimals).div(1e36);
}
}
return (rets, 100_000);
}
function calculateBancor(
IERC20 /*fromToken*/,
IERC20 /*destToken*/,
uint256 /*amount*/,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
return (new uint256[](parts), 0);
// IBancorNetwork bancorNetwork = IBancorNetwork(bancorContractRegistry.addressOf("BancorNetwork"));
// address[] memory path = bancorFinder.buildBancorPath(
// fromToken.isETH() ? bancorEtherToken : fromToken,
// destToken.isETH() ? bancorEtherToken : destToken
// );
// rets = _linearInterpolation(amount, parts);
// for (uint i = 0; i < parts; i++) {
// (bool success, bytes memory data) = address(bancorNetwork).staticcall.gas(500000)(
// abi.encodeWithSelector(
// bancorNetwork.getReturnByPath.selector,
// path,
// rets[i]
// )
// );
// if (!success || data.length == 0) {
// for (; i < parts; i++) {
// rets[i] = 0;
// }
// break;
// } else {
// (uint256 ret,) = abi.decode(data, (uint256,uint256));
// rets[i] = ret;
// }
// }
// return (rets, path.length.mul(150_000));
}
function calculateOasis(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = _linearInterpolation(amount, parts);
for (uint i = 0; i < parts; i++) {
(bool success, bytes memory data) = address(oasisExchange).staticcall.gas(500000)(
abi.encodeWithSelector(
oasisExchange.getBuyAmount.selector,
destToken.isETH() ? weth : destToken,
fromToken.isETH() ? weth : fromToken,
rets[i]
)
);
if (!success || data.length == 0) {
for (; i < parts; i++) {
rets[i] = 0;
}
break;
} else {
rets[i] = abi.decode(data, (uint256));
}
}
return (rets, 500_000);
}
function calculateMooniswapMany(
IERC20 fromToken,
IERC20 destToken,
uint256[] memory amounts
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = new uint256[](amounts.length);
IMooniswap mooniswap = mooniswapRegistry.pools(
fromToken.isETH() ? ZERO_ADDRESS : fromToken,
destToken.isETH() ? ZERO_ADDRESS : destToken
);
if (mooniswap == IMooniswap(0)) {
return (rets, 0);
}
uint256 fee = mooniswap.fee();
uint256 fromBalance = mooniswap.getBalanceForAddition(fromToken.isETH() ? ZERO_ADDRESS : fromToken);
uint256 destBalance = mooniswap.getBalanceForRemoval(destToken.isETH() ? ZERO_ADDRESS : destToken);
if (fromBalance == 0 || destBalance == 0) {
return (rets, 0);
}
for (uint i = 0; i < amounts.length; i++) {
uint256 amount = amounts[i].sub(amounts[i].mul(fee).div(1e18));
rets[i] = amount.mul(destBalance).div(
fromBalance.add(amount)
);
}
return (rets, (fromToken.isETH() || destToken.isETH()) ? 80_000 : 110_000);
}
function calculateMooniswap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
return calculateMooniswapMany(
fromToken,
destToken,
_linearInterpolation(amount, parts)
);
}
function calculateMooniswapOverETH(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken.isETH() || destToken.isETH()) {
return (new uint256[](parts), 0);
}
(uint256[] memory results, uint256 gas1) = calculateMooniswap(fromToken, ZERO_ADDRESS, amount, parts, flags);
(rets, gas) = calculateMooniswapMany(ZERO_ADDRESS, destToken, results);
gas = gas.add(gas1);
}
function calculateMooniswapOverDAI(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken == dai || destToken == dai) {
return (new uint256[](parts), 0);
}
(uint256[] memory results, uint256 gas1) = calculateMooniswap(fromToken, dai, amount, parts, flags);
(rets, gas) = calculateMooniswapMany(dai, destToken, results);
gas = gas.add(gas1);
}
function calculateMooniswapOverUSDC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken == usdc || destToken == usdc) {
return (new uint256[](parts), 0);
}
(uint256[] memory results, uint256 gas1) = calculateMooniswap(fromToken, usdc, amount, parts, flags);
(rets, gas) = calculateMooniswapMany(usdc, destToken, results);
gas = gas.add(gas1);
}
function calculateUniswapV2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
return _calculateUniswapV2(
fromToken,
destToken,
_linearInterpolation(amount, parts),
flags
);
}
function calculateUniswapV2ETH(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken.isETH() || fromToken == weth || destToken.isETH() || destToken == weth) {
return (new uint256[](parts), 0);
}
return _calculateUniswapV2OverMidToken(
fromToken,
weth,
destToken,
amount,
parts,
flags
);
}
function calculateUniswapV2DAI(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken == dai || destToken == dai) {
return (new uint256[](parts), 0);
}
return _calculateUniswapV2OverMidToken(
fromToken,
dai,
destToken,
amount,
parts,
flags
);
}
function calculateUniswapV2USDC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
if (fromToken == usdc || destToken == usdc) {
return (new uint256[](parts), 0);
}
return _calculateUniswapV2OverMidToken(
fromToken,
usdc,
destToken,
amount,
parts,
flags
);
}
function _calculateUniswapV2(
IERC20 fromToken,
IERC20 destToken,
uint256[] memory amounts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = new uint256[](amounts.length);
IERC20 fromTokenReal = fromToken.isETH() ? weth : fromToken;
IERC20 destTokenReal = destToken.isETH() ? weth : destToken;
IUniswapV2Exchange exchange = uniswapV2.getPair(fromTokenReal, destTokenReal);
if (exchange != IUniswapV2Exchange(0)) {
uint256 fromTokenBalance = fromTokenReal.universalBalanceOf(address(exchange));
uint256 destTokenBalance = destTokenReal.universalBalanceOf(address(exchange));
for (uint i = 0; i < amounts.length; i++) {
rets[i] = _calculateUniswapFormula(fromTokenBalance, destTokenBalance, amounts[i]);
}
return (rets, 50_000);
}
}
function _calculateUniswapV2OverMidToken(
IERC20 fromToken,
IERC20 midToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
) internal view returns(uint256[] memory rets, uint256 gas) {
rets = _linearInterpolation(amount, parts);
uint256 gas1;
uint256 gas2;
(rets, gas1) = _calculateUniswapV2(fromToken, midToken, rets, flags);
(rets, gas2) = _calculateUniswapV2(midToken, destToken, rets, flags);
return (rets, gas1 + gas2);
}
function _calculateNoReturn(
IERC20 /*fromToken*/,
IERC20 /*destToken*/,
uint256 /*amount*/,
uint256 parts,
uint256 /*flags*/
) internal view returns(uint256[] memory rets, uint256 gas) {
this;
return (new uint256[](parts), 0);
}
}
contract OneSplitBaseWrap is IOneSplit, OneSplitRoot {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags // See constants in IOneSplit.sol
) internal {
if (fromToken == destToken) {
return;
}
_swapFloor(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _swapFloor(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 /*flags*/ // See constants in IOneSplit.sol
) internal;
}
contract OneSplit is IOneSplit, OneSplitRoot {
IOneSplitView public oneSplitView;
constructor(IOneSplitView _oneSplitView) public {
oneSplitView = _oneSplitView;
}
function() external payable {
// solium-disable-next-line security/no-tx-origin
require(msg.sender != tx.origin);
}
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, , distribution) = getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
0
);
}
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return oneSplitView.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 minReturn,
uint256[] memory distribution,
uint256 flags // See constants in IOneSplit.sol
) public payable returns(uint256 returnAmount) {
if (fromToken == destToken) {
return amount;
}
function(IERC20,IERC20,uint256,uint256)[DEXES_COUNT] memory reserves = [
_swapOnUniswap,
_swapOnNowhere,
_swapOnBancor,
_swapOnOasis,
_swapOnCurveCompound,
_swapOnCurveUSDT,
_swapOnCurveY,
_swapOnCurveBinance,
_swapOnCurveSynthetix,
_swapOnUniswapCompound,
_swapOnUniswapChai,
_swapOnUniswapAave,
_swapOnMooniswap,
_swapOnUniswapV2,
_swapOnUniswapV2ETH,
_swapOnUniswapV2DAI,
_swapOnUniswapV2USDC,
_swapOnCurvePAX,
_swapOnCurveRenBTC,
_swapOnCurveTBTC,
_swapOnDforceSwap,
_swapOnShell,
_swapOnMStableMUSD,
_swapOnCurveSBTC,
_swapOnBalancer1,
_swapOnBalancer2,
_swapOnBalancer3,
_swapOnKyber1,
_swapOnKyber2,
_swapOnKyber3,
_swapOnKyber4,
_swapOnMooniswapETH,
_swapOnMooniswapDAI,
_swapOnMooniswapUSDC
];
require(distribution.length <= reserves.length, "OneSplit: Distribution array should not exceed reserves array size");
uint256 parts = 0;
uint256 lastNonZeroIndex = 0;
for (uint i = 0; i < distribution.length; i++) {
if (distribution[i] > 0) {
parts = parts.add(distribution[i]);
lastNonZeroIndex = i;
}
}
if (parts == 0) {
if (fromToken.isETH()) {
msg.sender.transfer(msg.value);
return msg.value;
}
return amount;
}
fromToken.universalTransferFrom(msg.sender, address(this), amount);
uint256 remainingAmount = fromToken.universalBalanceOf(address(this));
for (uint i = 0; i < distribution.length; i++) {
if (distribution[i] == 0) {
continue;
}
uint256 swapAmount = amount.mul(distribution[i]).div(parts);
if (i == lastNonZeroIndex) {
swapAmount = remainingAmount;
}
remainingAmount -= swapAmount;
reserves[i](fromToken, destToken, swapAmount, flags);
}
returnAmount = destToken.universalBalanceOf(address(this));
require(returnAmount >= minReturn, "OneSplit: Return amount was not enough");
destToken.universalTransfer(msg.sender, returnAmount);
fromToken.universalTransfer(msg.sender, fromToken.universalBalanceOf(address(this)));
}
// Swap helpers
function _swapOnCurveCompound(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) + (fromToken == usdc ? 2 : 0);
int128 j = (destToken == dai ? 1 : 0) + (destToken == usdc ? 2 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveCompound), amount);
curveCompound.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnCurveUSDT(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) +
(fromToken == usdc ? 2 : 0) +
(fromToken == usdt ? 3 : 0);
int128 j = (destToken == dai ? 1 : 0) +
(destToken == usdc ? 2 : 0) +
(destToken == usdt ? 3 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveUSDT), amount);
curveUSDT.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnCurveY(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) +
(fromToken == usdc ? 2 : 0) +
(fromToken == usdt ? 3 : 0) +
(fromToken == tusd ? 4 : 0);
int128 j = (destToken == dai ? 1 : 0) +
(destToken == usdc ? 2 : 0) +
(destToken == usdt ? 3 : 0) +
(destToken == tusd ? 4 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveY), amount);
curveY.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnCurveBinance(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) +
(fromToken == usdc ? 2 : 0) +
(fromToken == usdt ? 3 : 0) +
(fromToken == busd ? 4 : 0);
int128 j = (destToken == dai ? 1 : 0) +
(destToken == usdc ? 2 : 0) +
(destToken == usdt ? 3 : 0) +
(destToken == busd ? 4 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveBinance), amount);
curveBinance.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnCurveSynthetix(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) +
(fromToken == usdc ? 2 : 0) +
(fromToken == usdt ? 3 : 0) +
(fromToken == susd ? 4 : 0);
int128 j = (destToken == dai ? 1 : 0) +
(destToken == usdc ? 2 : 0) +
(destToken == usdt ? 3 : 0) +
(destToken == susd ? 4 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveSynthetix), amount);
curveSynthetix.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnCurvePAX(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == dai ? 1 : 0) +
(fromToken == usdc ? 2 : 0) +
(fromToken == usdt ? 3 : 0) +
(fromToken == pax ? 4 : 0);
int128 j = (destToken == dai ? 1 : 0) +
(destToken == usdc ? 2 : 0) +
(destToken == usdt ? 3 : 0) +
(destToken == pax ? 4 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curvePAX), amount);
curvePAX.exchange_underlying(i - 1, j - 1, amount, 0);
}
function _swapOnShell(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
fromToken.universalApprove(address(shell), amount);
shell.swapByOrigin(
address(fromToken),
address(destToken),
amount,
0,
now + 50
);
}
function _swapOnMStableMUSD(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
fromToken.universalApprove(address(musd), amount);
musd.swap(
fromToken,
destToken,
amount,
address(this)
);
}
function _swapOnCurveRenBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == renbtc ? 1 : 0) +
(fromToken == wbtc ? 2 : 0);
int128 j = (destToken == renbtc ? 1 : 0) +
(destToken == wbtc ? 2 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveRenBTC), amount);
curveRenBTC.exchange(i - 1, j - 1, amount, 0);
}
function _swapOnCurveTBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == tbtc ? 1 : 0) +
(fromToken == wbtc ? 2 : 0) +
(fromToken == hbtc ? 3 : 0);
int128 j = (destToken == tbtc ? 1 : 0) +
(destToken == wbtc ? 2 : 0) +
(destToken == hbtc ? 3 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveTBTC), amount);
curveTBTC.exchange(i - 1, j - 1, amount, 0);
}
function _swapOnCurveSBTC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
int128 i = (fromToken == renbtc ? 1 : 0) +
(fromToken == wbtc ? 2 : 0) +
(fromToken == sbtc ? 3 : 0);
int128 j = (destToken == renbtc ? 1 : 0) +
(destToken == wbtc ? 2 : 0) +
(destToken == sbtc ? 3 : 0);
if (i == 0 || j == 0) {
return;
}
fromToken.universalApprove(address(curveSBTC), amount);
curveSBTC.exchange(i - 1, j - 1, amount, 0);
}
function _swapOnDforceSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
fromToken.universalApprove(address(dforceSwap), amount);
dforceSwap.swap(fromToken, destToken, amount);
}
function _swapOnUniswap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
uint256 returnAmount = amount;
if (!fromToken.isETH()) {
IUniswapExchange fromExchange = uniswapFactory.getExchange(fromToken);
if (fromExchange != IUniswapExchange(0)) {
fromToken.universalApprove(address(fromExchange), returnAmount);
returnAmount = fromExchange.tokenToEthSwapInput(returnAmount, 1, now);
}
}
if (!destToken.isETH()) {
IUniswapExchange toExchange = uniswapFactory.getExchange(destToken);
if (toExchange != IUniswapExchange(0)) {
returnAmount = toExchange.ethToTokenSwapInput.value(returnAmount)(1, now);
}
}
}
function _swapOnUniswapCompound(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
if (!fromToken.isETH()) {
ICompoundToken fromCompound = compoundRegistry.cTokenByToken(fromToken);
fromToken.universalApprove(address(fromCompound), amount);
fromCompound.mint(amount);
_swapOnUniswap(IERC20(fromCompound), destToken, IERC20(fromCompound).universalBalanceOf(address(this)), flags);
return;
}
if (!destToken.isETH()) {
ICompoundToken toCompound = compoundRegistry.cTokenByToken(destToken);
_swapOnUniswap(fromToken, IERC20(toCompound), amount, flags);
toCompound.redeem(IERC20(toCompound).universalBalanceOf(address(this)));
destToken.universalBalanceOf(address(this));
return;
}
}
function _swapOnUniswapChai(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
if (fromToken == dai) {
fromToken.universalApprove(address(chai), amount);
chai.join(address(this), amount);
_swapOnUniswap(IERC20(chai), destToken, IERC20(chai).universalBalanceOf(address(this)), flags);
return;
}
if (destToken == dai) {
_swapOnUniswap(fromToken, IERC20(chai), amount, flags);
chai.exit(address(this), chai.balanceOf(address(this)));
return;
}
}
function _swapOnUniswapAave(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
if (!fromToken.isETH()) {
IAaveToken fromAave = aaveRegistry.aTokenByToken(fromToken);
fromToken.universalApprove(aave.core(), amount);
aave.deposit(fromToken, amount, 1101);
_swapOnUniswap(IERC20(fromAave), destToken, IERC20(fromAave).universalBalanceOf(address(this)), flags);
return;
}
if (!destToken.isETH()) {
IAaveToken toAave = aaveRegistry.aTokenByToken(destToken);
_swapOnUniswap(fromToken, IERC20(toAave), amount, flags);
toAave.redeem(toAave.balanceOf(address(this)));
return;
}
}
function _swapOnMooniswap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
IMooniswap mooniswap = mooniswapRegistry.pools(
fromToken.isETH() ? ZERO_ADDRESS : fromToken,
destToken.isETH() ? ZERO_ADDRESS : destToken
);
fromToken.universalApprove(address(mooniswap), amount);
mooniswap.swap.value(fromToken.isETH() ? amount : 0)(
fromToken.isETH() ? ZERO_ADDRESS : fromToken,
destToken.isETH() ? ZERO_ADDRESS : destToken,
amount,
0,
0x4D37f28D2db99e8d35A6C725a5f1749A085850a3
);
}
function _swapOnMooniswapETH(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnMooniswap(fromToken, ZERO_ADDRESS, amount, flags);
_swapOnMooniswap(ZERO_ADDRESS, destToken, address(this).balance, flags);
}
function _swapOnMooniswapDAI(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnMooniswap(fromToken, dai, amount, flags);
_swapOnMooniswap(dai, destToken, dai.balanceOf(address(this)), flags);
}
function _swapOnMooniswapUSDC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnMooniswap(fromToken, usdc, amount, flags);
_swapOnMooniswap(usdc, destToken, usdc.balanceOf(address(this)), flags);
}
function _swapOnNowhere(
IERC20 /*fromToken*/,
IERC20 /*destToken*/,
uint256 /*amount*/,
uint256 /*flags*/
) internal {
revert("This source was deprecated");
}
function _swapOnKyber1(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnKyber(
fromToken,
destToken,
amount,
flags,
0xff4b796265722046707200000000000000000000000000000000000000000000
);
}
function _swapOnKyber2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnKyber(
fromToken,
destToken,
amount,
flags,
0xffabcd0000000000000000000000000000000000000000000000000000000000
);
}
function _swapOnKyber3(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnKyber(
fromToken,
destToken,
amount,
flags,
0xff4f6e65426974205175616e7400000000000000000000000000000000000000
);
}
function _swapOnKyber4(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnKyber(
fromToken,
destToken,
amount,
flags,
_kyberReserveIdByTokens(fromToken, destToken)
);
}
function _swapOnKyber(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/,
bytes32 reserveId
) internal {
uint256 returnAmount = amount;
bytes32[] memory reserveIds = new bytes32[](1);
reserveIds[0] = reserveId;
if (!fromToken.isETH()) {
bytes memory fromHint = kyberHintHandler.buildTokenToEthHint(
fromToken,
IKyberHintHandler.TradeType.MaskIn,
reserveIds,
new uint256[](0)
);
fromToken.universalApprove(address(kyberNetworkProxy), amount);
returnAmount = kyberNetworkProxy.tradeWithHintAndFee(
fromToken,
returnAmount,
ETH_ADDRESS,
address(this),
uint256(-1),
0,
0x4D37f28D2db99e8d35A6C725a5f1749A085850a3,
10,
fromHint
);
}
if (!destToken.isETH()) {
bytes memory destHint = kyberHintHandler.buildEthToTokenHint(
destToken,
IKyberHintHandler.TradeType.MaskIn,
reserveIds,
new uint256[](0)
);
returnAmount = kyberNetworkProxy.tradeWithHintAndFee.value(returnAmount)(
ETH_ADDRESS,
returnAmount,
destToken,
address(this),
uint256(-1),
0,
0x4D37f28D2db99e8d35A6C725a5f1749A085850a3,
10,
destHint
);
}
}
function _swapOnBancor(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
IBancorNetwork bancorNetwork = IBancorNetwork(bancorContractRegistry.addressOf("BancorNetwork"));
address[] memory path = bancorNetworkPathFinder.generatePath(
fromToken.isETH() ? bancorEtherToken : fromToken,
destToken.isETH() ? bancorEtherToken : destToken
);
fromToken.universalApprove(address(bancorNetwork), amount);
bancorNetwork.convert.value(fromToken.isETH() ? amount : 0)(path, amount, 1);
}
function _swapOnOasis(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal {
if (fromToken.isETH()) {
weth.deposit.value(amount)();
}
IERC20 approveToken = fromToken.isETH() ? weth : fromToken;
approveToken.universalApprove(address(oasisExchange), amount);
oasisExchange.sellAllAmount(
fromToken.isETH() ? weth : fromToken,
amount,
destToken.isETH() ? weth : destToken,
1
);
if (destToken.isETH()) {
weth.withdraw(weth.balanceOf(address(this)));
}
}
function _swapOnUniswapV2Internal(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/
) internal returns(uint256 returnAmount) {
if (fromToken.isETH()) {
weth.deposit.value(amount)();
}
IERC20 fromTokenReal = fromToken.isETH() ? weth : fromToken;
IERC20 toTokenReal = destToken.isETH() ? weth : destToken;
IUniswapV2Exchange exchange = uniswapV2.getPair(fromTokenReal, toTokenReal);
returnAmount = exchange.getReturn(fromTokenReal, toTokenReal, amount);
fromTokenReal.universalTransfer(address(exchange), amount);
if (uint256(address(fromTokenReal)) < uint256(address(toTokenReal))) {
exchange.swap(0, returnAmount, address(this), "");
} else {
exchange.swap(returnAmount, 0, address(this), "");
}
if (destToken.isETH()) {
weth.withdraw(weth.balanceOf(address(this)));
}
}
function _swapOnUniswapV2OverMid(
IERC20 fromToken,
IERC20 midToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnUniswapV2Internal(
midToken,
destToken,
_swapOnUniswapV2Internal(
fromToken,
midToken,
amount,
flags
),
flags
);
}
function _swapOnUniswapV2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnUniswapV2Internal(
fromToken,
destToken,
amount,
flags
);
}
function _swapOnUniswapV2ETH(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnUniswapV2OverMid(
fromToken,
weth,
destToken,
amount,
flags
);
}
function _swapOnUniswapV2DAI(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnUniswapV2OverMid(
fromToken,
dai,
destToken,
amount,
flags
);
}
function _swapOnUniswapV2USDC(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnUniswapV2OverMid(
fromToken,
usdc,
destToken,
amount,
flags
);
}
function _swapOnBalancerX(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 /*flags*/,
uint256 poolIndex
) internal {
address[] memory pools = balancerRegistry.getBestPoolsWithLimit(
address(fromToken.isETH() ? weth : fromToken),
address(destToken.isETH() ? weth : destToken),
poolIndex + 1
);
if (fromToken.isETH()) {
weth.deposit.value(amount)();
}
(fromToken.isETH() ? weth : fromToken).universalApprove(pools[poolIndex], amount);
IBalancerPool(pools[poolIndex]).swapExactAmountIn(
fromToken.isETH() ? weth : fromToken,
amount,
destToken.isETH() ? weth : destToken,
0,
uint256(-1)
);
if (destToken.isETH()) {
weth.withdraw(weth.balanceOf(address(this)));
}
}
function _swapOnBalancer1(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnBalancerX(fromToken, destToken, amount, flags, 0);
}
function _swapOnBalancer2(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnBalancerX(fromToken, destToken, amount, flags, 1);
}
function _swapOnBalancer3(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 flags
) internal {
_swapOnBalancerX(fromToken, destToken, amount, flags, 2);
}
}
// File: contracts/OneSplitCompound.sol
pragma solidity ^0.5.0;
contract OneSplitCompoundView is OneSplitViewWrapBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _compoundGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _compoundGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_COMPOUND)) {
IERC20 underlying = compoundRegistry.tokenByCToken(ICompoundToken(address(fromToken)));
if (underlying != IERC20(0)) {
uint256 compoundRate = ICompoundToken(address(fromToken)).exchangeRateStored();
(returnAmount, estimateGasAmount, distribution) = _compoundGetExpectedReturn(
underlying,
destToken,
amount.mul(compoundRate).div(1e18),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 295_000, distribution);
}
underlying = compoundRegistry.tokenByCToken(ICompoundToken(address(destToken)));
if (underlying != IERC20(0)) {
uint256 _destTokenEthPriceTimesGasPrice = destTokenEthPriceTimesGasPrice;
uint256 compoundRate = ICompoundToken(address(destToken)).exchangeRateStored();
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
underlying,
amount,
parts,
flags,
_destTokenEthPriceTimesGasPrice.mul(compoundRate).div(1e18)
);
return (returnAmount.mul(1e18).div(compoundRate), estimateGasAmount + 430_000, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitCompound is OneSplitBaseWrap {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_compoundSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _compoundSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_COMPOUND)) {
IERC20 underlying = compoundRegistry.tokenByCToken(ICompoundToken(address(fromToken)));
if (underlying != IERC20(0)) {
ICompoundToken(address(fromToken)).redeem(amount);
uint256 underlyingAmount = underlying.universalBalanceOf(address(this));
return _compoundSwap(
underlying,
destToken,
underlyingAmount,
distribution,
flags
);
}
underlying = compoundRegistry.tokenByCToken(ICompoundToken(address(destToken)));
if (underlying != IERC20(0)) {
super._swap(
fromToken,
underlying,
amount,
distribution,
flags
);
uint256 underlyingAmount = underlying.universalBalanceOf(address(this));
if (underlying.isETH()) {
cETH.mint.value(underlyingAmount)();
} else {
underlying.universalApprove(address(destToken), underlyingAmount);
ICompoundToken(address(destToken)).mint(underlyingAmount);
}
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/interface/IFulcrum.sol
pragma solidity ^0.5.0;
contract IFulcrumToken is IERC20 {
function tokenPrice() external view returns (uint256);
function loanTokenAddress() external view returns (address);
function mintWithEther(address receiver) external payable returns (uint256 mintAmount);
function mint(address receiver, uint256 depositAmount) external returns (uint256 mintAmount);
function burnToEther(address receiver, uint256 burnAmount)
external
returns (uint256 loanAmountPaid);
function burn(address receiver, uint256 burnAmount) external returns (uint256 loanAmountPaid);
}
// File: contracts/OneSplitFulcrum.sol
pragma solidity ^0.5.0;
contract OneSplitFulcrumBase {
using UniversalERC20 for IERC20;
function _isFulcrumToken(IERC20 token) internal view returns(IERC20) {
if (token.isETH()) {
return IERC20(-1);
}
(bool success, bytes memory data) = address(token).staticcall.gas(5000)(abi.encodeWithSignature(
"name()"
));
if (!success) {
return IERC20(-1);
}
bool foundBZX = false;
for (uint i = 0; i + 6 < data.length; i++) {
if (data[i + 0] == "F" &&
data[i + 1] == "u" &&
data[i + 2] == "l" &&
data[i + 3] == "c" &&
data[i + 4] == "r" &&
data[i + 5] == "u" &&
data[i + 6] == "m")
{
foundBZX = true;
break;
}
}
if (!foundBZX) {
return IERC20(-1);
}
(success, data) = address(token).staticcall.gas(5000)(abi.encodeWithSelector(
IFulcrumToken(address(token)).loanTokenAddress.selector
));
if (!success) {
return IERC20(-1);
}
return abi.decode(data, (IERC20));
}
}
contract OneSplitFulcrumView is OneSplitViewWrapBase, OneSplitFulcrumBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _fulcrumGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _fulcrumGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_FULCRUM)) {
IERC20 underlying = _isFulcrumToken(fromToken);
if (underlying != IERC20(-1)) {
uint256 fulcrumRate = IFulcrumToken(address(fromToken)).tokenPrice();
(returnAmount, estimateGasAmount, distribution) = _fulcrumGetExpectedReturn(
underlying,
destToken,
amount.mul(fulcrumRate).div(1e18),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 381_000, distribution);
}
underlying = _isFulcrumToken(destToken);
if (underlying != IERC20(-1)) {
uint256 _destTokenEthPriceTimesGasPrice = destTokenEthPriceTimesGasPrice;
uint256 fulcrumRate = IFulcrumToken(address(destToken)).tokenPrice();
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
underlying,
amount,
parts,
flags,
_destTokenEthPriceTimesGasPrice.mul(fulcrumRate).div(1e18)
);
return (returnAmount.mul(1e18).div(fulcrumRate), estimateGasAmount + 354_000, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitFulcrum is OneSplitBaseWrap, OneSplitFulcrumBase {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_fulcrumSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _fulcrumSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_FULCRUM)) {
IERC20 underlying = _isFulcrumToken(fromToken);
if (underlying != IERC20(-1)) {
if (underlying.isETH()) {
IFulcrumToken(address(fromToken)).burnToEther(address(this), amount);
} else {
IFulcrumToken(address(fromToken)).burn(address(this), amount);
}
uint256 underlyingAmount = underlying.universalBalanceOf(address(this));
return super._swap(
underlying,
destToken,
underlyingAmount,
distribution,
flags
);
}
underlying = _isFulcrumToken(destToken);
if (underlying != IERC20(-1)) {
super._swap(
fromToken,
underlying,
amount,
distribution,
flags
);
uint256 underlyingAmount = underlying.universalBalanceOf(address(this));
if (underlying.isETH()) {
IFulcrumToken(address(destToken)).mintWithEther.value(underlyingAmount)(address(this));
} else {
underlying.universalApprove(address(destToken), underlyingAmount);
IFulcrumToken(address(destToken)).mint(address(this), underlyingAmount);
}
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/OneSplitChai.sol
pragma solidity ^0.5.0;
contract OneSplitChaiView is OneSplitViewWrapBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_CHAI)) {
if (fromToken == IERC20(chai)) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
dai,
destToken,
chai.chaiToDai(amount),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 197_000, distribution);
}
if (destToken == IERC20(chai)) {
uint256 price = chai.chaiPrice();
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
dai,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice.mul(1e18).div(price)
);
return (returnAmount.mul(price).div(1e18), estimateGasAmount + 168_000, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitChai is OneSplitBaseWrap {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_CHAI)) {
if (fromToken == IERC20(chai)) {
chai.exit(address(this), amount);
return super._swap(
dai,
destToken,
dai.balanceOf(address(this)),
distribution,
flags
);
}
if (destToken == IERC20(chai)) {
super._swap(
fromToken,
dai,
amount,
distribution,
flags
);
uint256 daiBalance = dai.balanceOf(address(this));
dai.universalApprove(address(chai), daiBalance);
chai.join(address(this), daiBalance);
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/interface/IBdai.sol
pragma solidity ^0.5.0;
contract IBdai is IERC20 {
function join(uint256) external;
function exit(uint256) external;
}
// File: contracts/OneSplitBdai.sol
pragma solidity ^0.5.0;
contract OneSplitBdaiBase {
IBdai internal constant bdai = IBdai(0x6a4FFAafa8DD400676Df8076AD6c724867b0e2e8);
IERC20 internal constant btu = IERC20(0xb683D83a532e2Cb7DFa5275eED3698436371cc9f);
}
contract OneSplitBdaiView is OneSplitViewWrapBase, OneSplitBdaiBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_BDAI)) {
if (fromToken == IERC20(bdai)) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
dai,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 227_000, distribution);
}
if (destToken == IERC20(bdai)) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
dai,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 295_000, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitBdai is OneSplitBaseWrap, OneSplitBdaiBase {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_BDAI)) {
if (fromToken == IERC20(bdai)) {
bdai.exit(amount);
uint256 btuBalance = btu.balanceOf(address(this));
if (btuBalance > 0) {
(,uint256[] memory btuDistribution) = getExpectedReturn(
btu,
destToken,
btuBalance,
1,
flags
);
_swap(
btu,
destToken,
btuBalance,
btuDistribution,
flags
);
}
return super._swap(
dai,
destToken,
amount,
distribution,
flags
);
}
if (destToken == IERC20(bdai)) {
super._swap(fromToken, dai, amount, distribution, flags);
uint256 daiBalance = dai.balanceOf(address(this));
dai.universalApprove(address(bdai), daiBalance);
bdai.join(daiBalance);
return;
}
}
return super._swap(fromToken, destToken, amount, distribution, flags);
}
}
// File: contracts/interface/IIearn.sol
pragma solidity ^0.5.0;
contract IIearn is IERC20 {
function token() external view returns(IERC20);
function calcPoolValueInToken() external view returns(uint256);
function deposit(uint256 _amount) external;
function withdraw(uint256 _shares) external;
}
// File: contracts/OneSplitIearn.sol
pragma solidity ^0.5.0;
contract OneSplitIearnBase {
function _yTokens() internal pure returns(IIearn[13] memory) {
return [
IIearn(0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01),
IIearn(0x04Aa51bbcB46541455cCF1B8bef2ebc5d3787EC9),
IIearn(0x73a052500105205d34Daf004eAb301916DA8190f),
IIearn(0x83f798e925BcD4017Eb265844FDDAbb448f1707D),
IIearn(0xd6aD7a6750A7593E092a9B218d66C0A814a3436e),
IIearn(0xF61718057901F84C4eEC4339EF8f0D86D2B45600),
IIearn(0x04bC0Ab673d88aE9dbC9DA2380cB6B79C4BCa9aE),
IIearn(0xC2cB1040220768554cf699b0d863A3cd4324ce32),
IIearn(0xE6354ed5bC4b393a5Aad09f21c46E101e692d447),
IIearn(0x26EA744E5B887E5205727f55dFBE8685e3b21951),
IIearn(0x99d1Fa417f94dcD62BfE781a1213c092a47041Bc),
IIearn(0x9777d7E2b60bB01759D0E2f8be2095df444cb07E),
IIearn(0x1bE5d71F2dA660BFdee8012dDc58D024448A0A59)
];
}
}
contract OneSplitIearnView is OneSplitViewWrapBase, OneSplitIearnBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _iearnGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _iearnGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (!flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == !flags.check(FLAG_DISABLE_IEARN)) {
IIearn[13] memory yTokens = _yTokens();
for (uint i = 0; i < yTokens.length; i++) {
if (fromToken == IERC20(yTokens[i])) {
(returnAmount, estimateGasAmount, distribution) = _iearnGetExpectedReturn(
yTokens[i].token(),
destToken,
amount
.mul(yTokens[i].calcPoolValueInToken())
.div(yTokens[i].totalSupply()),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 260_000, distribution);
}
}
for (uint i = 0; i < yTokens.length; i++) {
if (destToken == IERC20(yTokens[i])) {
uint256 _destTokenEthPriceTimesGasPrice = destTokenEthPriceTimesGasPrice;
IERC20 token = yTokens[i].token();
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
token,
amount,
parts,
flags,
_destTokenEthPriceTimesGasPrice
.mul(yTokens[i].calcPoolValueInToken())
.div(yTokens[i].totalSupply())
);
return(
returnAmount
.mul(yTokens[i].totalSupply())
.div(yTokens[i].calcPoolValueInToken()),
estimateGasAmount + 743_000,
distribution
);
}
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitIearn is OneSplitBaseWrap, OneSplitIearnBase {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_iearnSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _iearnSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_IEARN)) {
IIearn[13] memory yTokens = _yTokens();
for (uint i = 0; i < yTokens.length; i++) {
if (fromToken == IERC20(yTokens[i])) {
IERC20 underlying = yTokens[i].token();
yTokens[i].withdraw(amount);
_iearnSwap(underlying, destToken, underlying.balanceOf(address(this)), distribution, flags);
return;
}
}
for (uint i = 0; i < yTokens.length; i++) {
if (destToken == IERC20(yTokens[i])) {
IERC20 underlying = yTokens[i].token();
super._swap(fromToken, underlying, amount, distribution, flags);
uint256 underlyingBalance = underlying.balanceOf(address(this));
underlying.universalApprove(address(yTokens[i]), underlyingBalance);
yTokens[i].deposit(underlyingBalance);
return;
}
}
}
return super._swap(fromToken, destToken, amount, distribution, flags);
}
}
// File: contracts/interface/IIdle.sol
pragma solidity ^0.5.0;
contract IIdle is IERC20 {
function token()
external view returns (IERC20);
function tokenPrice()
external view returns (uint256);
function mintIdleToken(uint256 _amount, uint256[] calldata _clientProtocolAmounts)
external returns (uint256 mintedTokens);
function redeemIdleToken(uint256 _amount, bool _skipRebalance, uint256[] calldata _clientProtocolAmounts)
external returns (uint256 redeemedTokens);
}
// File: contracts/OneSplitIdle.sol
pragma solidity ^0.5.0;
contract OneSplitIdleBase {
function _idleTokens() internal pure returns(IIdle[8] memory) {
// https://developers.idle.finance/contracts-and-codebase
return [
// V3
IIdle(0x78751B12Da02728F467A44eAc40F5cbc16Bd7934),
IIdle(0x12B98C621E8754Ae70d0fDbBC73D6208bC3e3cA6),
IIdle(0x63D27B3DA94A9E871222CB0A32232674B02D2f2D),
IIdle(0x1846bdfDB6A0f5c473dEc610144513bd071999fB),
IIdle(0xcDdB1Bceb7a1979C6caa0229820707429dd3Ec6C),
IIdle(0x42740698959761BAF1B06baa51EfBD88CB1D862B),
// V2
IIdle(0x10eC0D497824e342bCB0EDcE00959142aAa766dD),
IIdle(0xeB66ACc3d011056B00ea521F8203580C2E5d3991)
];
}
}
contract OneSplitIdleView is OneSplitViewWrapBase, OneSplitIdleBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _idleGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _idleGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
internal
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (!flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == !flags.check(FLAG_DISABLE_IDLE)) {
IIdle[8] memory tokens = _idleTokens();
for (uint i = 0; i < tokens.length; i++) {
if (fromToken == IERC20(tokens[i])) {
(returnAmount, estimateGasAmount, distribution) = _idleGetExpectedReturn(
tokens[i].token(),
destToken,
amount.mul(tokens[i].tokenPrice()).div(1e18),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 2_400_000, distribution);
}
}
for (uint i = 0; i < tokens.length; i++) {
if (destToken == IERC20(tokens[i])) {
uint256 _destTokenEthPriceTimesGasPrice = destTokenEthPriceTimesGasPrice;
uint256 _price = tokens[i].tokenPrice();
IERC20 token = tokens[i].token();
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
token,
amount,
parts,
flags,
_destTokenEthPriceTimesGasPrice.mul(_price).div(1e18)
);
return (returnAmount.mul(1e18).div(_price), estimateGasAmount + 1_300_000, distribution);
}
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitIdle is OneSplitBaseWrap, OneSplitIdleBase {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_idleSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _idleSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
if (!flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == !flags.check(FLAG_DISABLE_IDLE)) {
IIdle[8] memory tokens = _idleTokens();
for (uint i = 0; i < tokens.length; i++) {
if (fromToken == IERC20(tokens[i])) {
IERC20 underlying = tokens[i].token();
uint256 minted = tokens[i].redeemIdleToken(amount, true, new uint256[](0));
_idleSwap(underlying, destToken, minted, distribution, flags);
return;
}
}
for (uint i = 0; i < tokens.length; i++) {
if (destToken == IERC20(tokens[i])) {
IERC20 underlying = tokens[i].token();
super._swap(fromToken, underlying, amount, distribution, flags);
uint256 underlyingBalance = underlying.balanceOf(address(this));
underlying.universalApprove(address(tokens[i]), underlyingBalance);
tokens[i].mintIdleToken(underlyingBalance, new uint256[](0));
return;
}
}
}
return super._swap(fromToken, destToken, amount, distribution, flags);
}
}
// File: contracts/OneSplitAave.sol
pragma solidity ^0.5.0;
contract OneSplitAaveView is OneSplitViewWrapBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags, // See constants in IOneSplit.sol
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _aaveGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _aaveGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_AAVE)) {
IERC20 underlying = aaveRegistry.tokenByAToken(IAaveToken(address(fromToken)));
if (underlying != IERC20(0)) {
(returnAmount, estimateGasAmount, distribution) = _aaveGetExpectedReturn(
underlying,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 670_000, distribution);
}
underlying = aaveRegistry.tokenByAToken(IAaveToken(address(destToken)));
if (underlying != IERC20(0)) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
underlying,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 310_000, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitAave is OneSplitBaseWrap {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_aaveSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _aaveSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_AAVE)) {
IERC20 underlying = aaveRegistry.tokenByAToken(IAaveToken(address(fromToken)));
if (underlying != IERC20(0)) {
IAaveToken(address(fromToken)).redeem(amount);
return _aaveSwap(
underlying,
destToken,
amount,
distribution,
flags
);
}
underlying = aaveRegistry.tokenByAToken(IAaveToken(address(destToken)));
if (underlying != IERC20(0)) {
super._swap(
fromToken,
underlying,
amount,
distribution,
flags
);
uint256 underlyingAmount = underlying.universalBalanceOf(address(this));
underlying.universalApprove(aave.core(), underlyingAmount);
aave.deposit.value(underlying.isETH() ? underlyingAmount : 0)(
underlying.isETH() ? ETH_ADDRESS : underlying,
underlyingAmount,
1101
);
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/OneSplitWeth.sol
pragma solidity ^0.5.0;
contract OneSplitWethView is OneSplitViewWrapBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _wethGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _wethGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_WETH)) {
if (fromToken == weth || fromToken == bancorEtherToken) {
return super.getExpectedReturnWithGas(ETH_ADDRESS, destToken, amount, parts, flags, destTokenEthPriceTimesGasPrice);
}
if (destToken == weth || destToken == bancorEtherToken) {
return super.getExpectedReturnWithGas(fromToken, ETH_ADDRESS, amount, parts, flags, destTokenEthPriceTimesGasPrice);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitWeth is OneSplitBaseWrap {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_wethSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _wethSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_WETH)) {
if (fromToken == weth) {
weth.withdraw(weth.balanceOf(address(this)));
super._swap(
ETH_ADDRESS,
destToken,
amount,
distribution,
flags
);
return;
}
if (fromToken == bancorEtherToken) {
bancorEtherToken.withdraw(bancorEtherToken.balanceOf(address(this)));
super._swap(
ETH_ADDRESS,
destToken,
amount,
distribution,
flags
);
return;
}
if (destToken == weth) {
_wethSwap(
fromToken,
ETH_ADDRESS,
amount,
distribution,
flags
);
weth.deposit.value(address(this).balance)();
return;
}
if (destToken == bancorEtherToken) {
_wethSwap(
fromToken,
ETH_ADDRESS,
amount,
distribution,
flags
);
bancorEtherToken.deposit.value(address(this).balance)();
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/OneSplitMStable.sol
pragma solidity ^0.5.0;
contract OneSplitMStableView is OneSplitViewWrapBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_MSTABLE_MUSD)) {
if (fromToken == IERC20(musd)) {
{
(bool valid1,, uint256 res1,) = musd_helper.getRedeemValidity(musd, amount, destToken);
if (valid1) {
return (res1, 300_000, new uint256[](DEXES_COUNT));
}
}
(bool valid,, address token) = musd_helper.suggestRedeemAsset(musd);
if (valid) {
(,, returnAmount,) = musd_helper.getRedeemValidity(musd, amount, IERC20(token));
if (IERC20(token) != destToken) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
IERC20(token),
destToken,
returnAmount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
} else {
distribution = new uint256[](DEXES_COUNT);
}
return (returnAmount, estimateGasAmount + 300_000, distribution);
}
}
if (destToken == IERC20(musd)) {
if (fromToken == usdc || fromToken == dai || fromToken == usdt || fromToken == tusd) {
(,, returnAmount) = musd.getSwapOutput(fromToken, destToken, amount);
return (returnAmount, 300_000, new uint256[](DEXES_COUNT));
}
else {
IERC20 _destToken = destToken;
(bool valid,, address token) = musd_helper.suggestMintAsset(_destToken);
if (valid) {
if (IERC20(token) != fromToken) {
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
IERC20(token),
amount,
parts,
flags,
_scaleDestTokenEthPriceTimesGasPrice(
_destToken,
IERC20(token),
destTokenEthPriceTimesGasPrice
)
);
} else {
returnAmount = amount;
}
(,, returnAmount) = musd.getSwapOutput(IERC20(token), _destToken, returnAmount);
return (returnAmount, estimateGasAmount + 300_000, distribution);
}
}
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitMStable is OneSplitBaseWrap {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_MSTABLE_MUSD)) {
if (fromToken == IERC20(musd)) {
if (destToken == usdc || destToken == dai || destToken == usdt || destToken == tusd) {
(,,, uint256 result) = musd_helper.getRedeemValidity(fromToken, amount, destToken);
musd.redeem(
destToken,
result
);
}
else {
(,,, uint256 result) = musd_helper.getRedeemValidity(fromToken, amount, dai);
musd.redeem(
dai,
result
);
super._swap(
dai,
destToken,
dai.balanceOf(address(this)),
distribution,
flags
);
}
return;
}
if (destToken == IERC20(musd)) {
if (fromToken == usdc || fromToken == dai || fromToken == usdt || fromToken == tusd) {
fromToken.universalApprove(address(musd), amount);
musd.swap(
fromToken,
destToken,
amount,
address(this)
);
}
else {
super._swap(
fromToken,
dai,
amount,
distribution,
flags
);
musd.swap(
dai,
destToken,
dai.balanceOf(address(this)),
address(this)
);
}
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: contracts/interface/IDMM.sol
pragma solidity ^0.5.0;
interface IDMMController {
function getUnderlyingTokenForDmm(IERC20 token) external view returns(IERC20);
}
contract IDMM is IERC20 {
function getCurrentExchangeRate() public view returns(uint256);
function mint(uint256 underlyingAmount) public returns(uint256);
function redeem(uint256 amount) public returns(uint256);
}
// File: contracts/OneSplitDMM.sol
pragma solidity ^0.5.0;
contract OneSplitDMMBase {
IDMMController internal constant _dmmController = IDMMController(0x4CB120Dd1D33C9A3De8Bc15620C7Cd43418d77E2);
function _getDMMUnderlyingToken(IERC20 token) internal view returns(IERC20) {
(bool success, bytes memory data) = address(_dmmController).staticcall(
abi.encodeWithSelector(
_dmmController.getUnderlyingTokenForDmm.selector,
token
)
);
if (!success || data.length == 0) {
return IERC20(-1);
}
return abi.decode(data, (IERC20));
}
function _getDMMExchangeRate(IDMM dmm) internal view returns(uint256) {
(bool success, bytes memory data) = address(dmm).staticcall(
abi.encodeWithSelector(
dmm.getCurrentExchangeRate.selector
)
);
if (!success || data.length == 0) {
return 0;
}
return abi.decode(data, (uint256));
}
}
contract OneSplitDMMView is OneSplitViewWrapBase, OneSplitDMMBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return _dmmGetExpectedReturn(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _dmmGetExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
private
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_DMM)) {
IERC20 underlying = _getDMMUnderlyingToken(fromToken);
if (underlying != IERC20(-1)) {
if (underlying == weth) {
underlying = ETH_ADDRESS;
}
IERC20 _fromToken = fromToken;
(returnAmount, estimateGasAmount, distribution) = _dmmGetExpectedReturn(
underlying,
destToken,
amount.mul(_getDMMExchangeRate(IDMM(address(_fromToken)))).div(1e18),
parts,
flags,
destTokenEthPriceTimesGasPrice
);
return (returnAmount, estimateGasAmount + 295_000, distribution);
}
underlying = _getDMMUnderlyingToken(destToken);
if (underlying != IERC20(-1)) {
if (underlying == weth) {
underlying = ETH_ADDRESS;
}
uint256 price = _getDMMExchangeRate(IDMM(address(destToken)));
(returnAmount, estimateGasAmount, distribution) = super.getExpectedReturnWithGas(
fromToken,
underlying,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice.mul(price).div(1e18)
);
return (
returnAmount.mul(1e18).div(price),
estimateGasAmount + 430_000,
distribution
);
}
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitDMM is OneSplitBaseWrap, OneSplitDMMBase {
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
_dmmSwap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
function _dmmSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
if (fromToken == destToken) {
return;
}
if (flags.check(FLAG_DISABLE_ALL_WRAP_SOURCES) == flags.check(FLAG_DISABLE_DMM)) {
IERC20 underlying = _getDMMUnderlyingToken(fromToken);
if (underlying != IERC20(-1)) {
IDMM(address(fromToken)).redeem(amount);
uint256 balance = underlying.universalBalanceOf(address(this));
if (underlying == weth) {
weth.withdraw(balance);
}
_dmmSwap(
(underlying == weth) ? ETH_ADDRESS : underlying,
destToken,
balance,
distribution,
flags
);
}
underlying = _getDMMUnderlyingToken(destToken);
if (underlying != IERC20(-1)) {
super._swap(
fromToken,
(underlying == weth) ? ETH_ADDRESS : underlying,
amount,
distribution,
flags
);
uint256 underlyingAmount = ((underlying == weth) ? ETH_ADDRESS : underlying).universalBalanceOf(address(this));
if (underlying == weth) {
weth.deposit.value(underlyingAmount);
}
underlying.universalApprove(address(destToken), underlyingAmount);
IDMM(address(destToken)).mint(underlyingAmount);
return;
}
}
return super._swap(
fromToken,
destToken,
amount,
distribution,
flags
);
}
}
// File: @openzeppelin/contracts/math/Math.sol
pragma solidity ^0.5.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @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, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// File: contracts/OneSplitMooniswapPoolToken.sol
pragma solidity ^0.5.0;
contract OneSplitMooniswapTokenBase {
using SafeMath for uint256;
using Math for uint256;
using UniversalERC20 for IERC20;
struct TokenInfo {
IERC20 token;
uint256 reserve;
}
struct PoolDetails {
TokenInfo[2] tokens;
uint256 totalSupply;
}
function _getPoolDetails(IMooniswap pool) internal view returns (PoolDetails memory details) {
for (uint i = 0; i < 2; i++) {
IERC20 token = pool.tokens(i);
details.tokens[i] = TokenInfo({
token: token,
reserve: token.universalBalanceOf(address(pool))
});
}
details.totalSupply = IERC20(address(pool)).totalSupply();
}
}
contract OneSplitMooniswapTokenView is OneSplitViewWrapBase, OneSplitMooniswapTokenBase {
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 toToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns (
uint256 returnAmount,
uint256,
uint256[] memory distribution
)
{
if (fromToken.eq(toToken)) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
if (!flags.check(FLAG_DISABLE_MOONISWAP_POOL_TOKEN)) {
bool isPoolTokenFrom = mooniswapRegistry.isPool(address(fromToken));
bool isPoolTokenTo = mooniswapRegistry.isPool(address(toToken));
if (isPoolTokenFrom && isPoolTokenTo) {
(
uint256 returnETHAmount,
uint256[] memory poolTokenFromDistribution
) = _getExpectedReturnFromMooniswapPoolToken(
fromToken,
ETH_ADDRESS,
amount,
parts,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
(
uint256 returnPoolTokenToAmount,
uint256[] memory poolTokenToDistribution
) = _getExpectedReturnToMooniswapPoolToken(
ETH_ADDRESS,
toToken,
returnETHAmount,
parts,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
for (uint i = 0; i < poolTokenToDistribution.length; i++) {
poolTokenFromDistribution[i] |= poolTokenToDistribution[i] << 128;
}
return (returnPoolTokenToAmount, 0, poolTokenFromDistribution);
}
if (isPoolTokenFrom) {
(returnAmount, distribution) = _getExpectedReturnFromMooniswapPoolToken(
fromToken,
toToken,
amount,
parts,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
return (returnAmount, 0, distribution);
}
if (isPoolTokenTo) {
(returnAmount, distribution) = _getExpectedReturnToMooniswapPoolToken(
fromToken,
toToken,
amount,
parts,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
return (returnAmount, 0, distribution);
}
}
return super.getExpectedReturnWithGas(
fromToken,
toToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _getExpectedReturnFromMooniswapPoolToken(
IERC20 poolToken,
IERC20 toToken,
uint256 amount,
uint256 parts,
uint256 flags
)
private
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
distribution = new uint256[](DEXES_COUNT);
PoolDetails memory details = _getPoolDetails(IMooniswap(address(poolToken)));
for (uint i = 0; i < 2; i++) {
uint256 exchangeAmount = amount
.mul(details.tokens[i].reserve)
.div(details.totalSupply);
if (toToken.eq(details.tokens[i].token)) {
returnAmount = returnAmount.add(exchangeAmount);
continue;
}
(uint256 ret, ,uint256[] memory dist) = super.getExpectedReturnWithGas(
details.tokens[i].token,
toToken,
exchangeAmount,
parts,
flags,
0
);
returnAmount = returnAmount.add(ret);
for (uint j = 0; j < distribution.length; j++) {
distribution[j] |= dist[j] << (i * 8);
}
}
return (returnAmount, distribution);
}
function _getExpectedReturnToMooniswapPoolToken(
IERC20 fromToken,
IERC20 poolToken,
uint256 amount,
uint256 parts,
uint256 flags
)
private
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
distribution = new uint256[](DEXES_COUNT);
PoolDetails memory details = _getPoolDetails(IMooniswap(address(poolToken)));
// will overwritten to liquidity amounts
uint256[2] memory amounts;
amounts[0] = amount.div(2);
amounts[1] = amount.sub(amounts[0]);
uint256[] memory dist = new uint256[](distribution.length);
for (uint i = 0; i < 2; i++) {
if (fromToken.eq(details.tokens[i].token)) {
continue;
}
(amounts[i], ,dist) = super.getExpectedReturnWithGas(
fromToken,
details.tokens[i].token,
amounts[i],
parts,
flags,
0
);
for (uint j = 0; j < distribution.length; j++) {
distribution[j] |= dist[j] << (i * 8);
}
}
returnAmount = uint256(-1);
for (uint i = 0; i < 2; i++) {
returnAmount = Math.min(
returnAmount,
details.totalSupply.mul(amounts[i]).div(details.tokens[i].reserve)
);
}
return (
returnAmount,
distribution
);
}
}
contract OneSplitMooniswapToken is OneSplitBaseWrap, OneSplitMooniswapTokenBase {
function _swap(
IERC20 fromToken,
IERC20 toToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
if (fromToken.eq(toToken)) {
return;
}
if (!flags.check(FLAG_DISABLE_MOONISWAP_POOL_TOKEN)) {
bool isPoolTokenFrom = mooniswapRegistry.isPool(address(fromToken));
bool isPoolTokenTo = mooniswapRegistry.isPool(address(toToken));
if (isPoolTokenFrom && isPoolTokenTo) {
uint256[] memory dist = new uint256[](distribution.length);
for (uint i = 0; i < distribution.length; i++) {
dist[i] = distribution[i] & ((1 << 128) - 1);
}
uint256 ethBalanceBefore = ETH_ADDRESS.universalBalanceOf(address(this));
_swapFromMooniswapToken(
fromToken,
ETH_ADDRESS,
amount,
dist,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
for (uint i = 0; i < distribution.length; i++) {
dist[i] = distribution[i] >> 128;
}
uint256 ethBalanceAfter = ETH_ADDRESS.universalBalanceOf(address(this));
return _swapToMooniswapToken(
ETH_ADDRESS,
toToken,
ethBalanceAfter.sub(ethBalanceBefore),
dist,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
}
if (isPoolTokenFrom) {
return _swapFromMooniswapToken(
fromToken,
toToken,
amount,
distribution,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
}
if (isPoolTokenTo) {
return _swapToMooniswapToken(
fromToken,
toToken,
amount,
distribution,
FLAG_DISABLE_MOONISWAP_POOL_TOKEN
);
}
}
return super._swap(
fromToken,
toToken,
amount,
distribution,
flags
);
}
function _swapFromMooniswapToken(
IERC20 poolToken,
IERC20 toToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
IERC20[2] memory tokens = [
IMooniswap(address(poolToken)).tokens(0),
IMooniswap(address(poolToken)).tokens(1)
];
IMooniswap(address(poolToken)).withdraw(
amount,
new uint256[](0)
);
uint256[] memory dist = new uint256[](distribution.length);
for (uint i = 0; i < 2; i++) {
if (toToken.eq(tokens[i])) {
continue;
}
for (uint j = 0; j < distribution.length; j++) {
dist[j] = (distribution[j] >> (i * 8)) & 0xFF;
}
super._swap(
tokens[i],
toToken,
tokens[i].universalBalanceOf(address(this)),
dist,
flags
);
}
}
function _swapToMooniswapToken(
IERC20 fromToken,
IERC20 poolToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) private {
IERC20[2] memory tokens = [
IMooniswap(address(poolToken)).tokens(0),
IMooniswap(address(poolToken)).tokens(1)
];
// will overwritten to liquidity amounts
uint256[] memory amounts = new uint256[](2);
amounts[0] = amount.div(2);
amounts[1] = amount.sub(amounts[0]);
uint256[] memory dist = new uint256[](distribution.length);
for (uint i = 0; i < 2; i++) {
if (fromToken.eq(tokens[i])) {
continue;
}
for (uint j = 0; j < distribution.length; j++) {
dist[j] = (distribution[j] >> (i * 8)) & 0xFF;
}
super._swap(
fromToken,
tokens[i],
amounts[i],
dist,
flags
);
amounts[i] = tokens[i].universalBalanceOf(address(this));
tokens[i].universalApprove(address(poolToken), amounts[i]);
}
uint256 ethValue = (tokens[0].isETH() ? amounts[0] : 0) + (tokens[1].isETH() ? amounts[1] : 0);
IMooniswap(address(poolToken)).deposit.value(ethValue)(
amounts,
0
);
for (uint i = 0; i < 2; i++) {
tokens[i].universalTransfer(
msg.sender,
tokens[i].universalBalanceOf(address(this))
);
}
}
}
// File: contracts/OneSplit.sol
pragma solidity ^0.5.0;
contract OneSplitViewWrap is
OneSplitViewWrapBase,
OneSplitMStableView,
OneSplitChaiView,
OneSplitBdaiView,
OneSplitAaveView,
OneSplitFulcrumView,
OneSplitCompoundView,
OneSplitIearnView,
OneSplitIdleView,
OneSplitWethView,
OneSplitDMMView,
OneSplitMooniswapTokenView
{
IOneSplitView public oneSplitView;
constructor(IOneSplitView _oneSplit) public {
oneSplitView = _oneSplit;
}
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, , distribution) = getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
0
);
}
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags, // See constants in IOneSplit.sol
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
if (fromToken == destToken) {
return (amount, 0, new uint256[](DEXES_COUNT));
}
return super.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function _getExpectedReturnRespectingGasFloor(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
internal
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return oneSplitView.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
}
contract OneSplitWrap is
OneSplitBaseWrap,
OneSplitMStable,
OneSplitChai,
OneSplitBdai,
OneSplitAave,
OneSplitFulcrum,
OneSplitCompound,
OneSplitIearn,
OneSplitIdle,
OneSplitWeth,
OneSplitDMM,
OneSplitMooniswapToken
{
IOneSplitView public oneSplitView;
IOneSplit public oneSplit;
constructor(IOneSplitView _oneSplitView, IOneSplit _oneSplit) public {
oneSplitView = _oneSplitView;
oneSplit = _oneSplit;
}
function() external payable {
// solium-disable-next-line security/no-tx-origin
require(msg.sender != tx.origin);
}
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
)
public
view
returns(
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, , distribution) = getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
0
);
}
function getExpectedReturnWithGas(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags,
uint256 destTokenEthPriceTimesGasPrice
)
public
view
returns(
uint256 returnAmount,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
return oneSplitView.getExpectedReturnWithGas(
fromToken,
destToken,
amount,
parts,
flags,
destTokenEthPriceTimesGasPrice
);
}
function getExpectedReturnWithGasMulti(
IERC20[] memory tokens,
uint256 amount,
uint256[] memory parts,
uint256[] memory flags,
uint256[] memory destTokenEthPriceTimesGasPrices
)
public
view
returns(
uint256[] memory returnAmounts,
uint256 estimateGasAmount,
uint256[] memory distribution
)
{
uint256[] memory dist;
returnAmounts = new uint256[](tokens.length - 1);
for (uint i = 1; i < tokens.length; i++) {
if (tokens[i - 1] == tokens[i]) {
returnAmounts[i - 1] = (i == 1) ? amount : returnAmounts[i - 2];
continue;
}
IERC20[] memory _tokens = tokens;
(
returnAmounts[i - 1],
amount,
dist
) = getExpectedReturnWithGas(
_tokens[i - 1],
_tokens[i],
(i == 1) ? amount : returnAmounts[i - 2],
parts[i - 1],
flags[i - 1],
destTokenEthPriceTimesGasPrices[i - 1]
);
estimateGasAmount = estimateGasAmount.add(amount);
if (distribution.length == 0) {
distribution = new uint256[](dist.length);
}
for (uint j = 0; j < distribution.length; j++) {
distribution[j] = distribution[j].add(dist[j] << (8 * (i - 1)));
}
}
}
function swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 minReturn,
uint256[] memory distribution,
uint256 flags
) public payable returns(uint256 returnAmount) {
fromToken.universalTransferFrom(msg.sender, address(this), amount);
uint256 confirmed = fromToken.universalBalanceOf(address(this));
_swap(fromToken, destToken, confirmed, distribution, flags);
returnAmount = destToken.universalBalanceOf(address(this));
require(returnAmount >= minReturn, "OneSplit: actual return amount is less than minReturn");
destToken.universalTransfer(msg.sender, returnAmount);
fromToken.universalTransfer(msg.sender, fromToken.universalBalanceOf(address(this)));
}
function swapMulti(
IERC20[] memory tokens,
uint256 amount,
uint256 minReturn,
uint256[] memory distribution,
uint256[] memory flags
) public payable returns(uint256 returnAmount) {
tokens[0].universalTransferFrom(msg.sender, address(this), amount);
returnAmount = tokens[0].universalBalanceOf(address(this));
for (uint i = 1; i < tokens.length; i++) {
if (tokens[i - 1] == tokens[i]) {
continue;
}
uint256[] memory dist = new uint256[](distribution.length);
for (uint j = 0; j < distribution.length; j++) {
dist[j] = (distribution[j] >> (8 * (i - 1))) & 0xFF;
}
_swap(
tokens[i - 1],
tokens[i],
returnAmount,
dist,
flags[i - 1]
);
returnAmount = tokens[i].universalBalanceOf(address(this));
tokens[i - 1].universalTransfer(msg.sender, tokens[i - 1].universalBalanceOf(address(this)));
}
require(returnAmount >= minReturn, "OneSplit: actual return amount is less than minReturn");
tokens[tokens.length - 1].universalTransfer(msg.sender, returnAmount);
}
function _swapFloor(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256[] memory distribution,
uint256 flags
) internal {
fromToken.universalApprove(address(oneSplit), amount);
oneSplit.swap.value(fromToken.isETH() ? amount : 0)(
fromToken,
destToken,
amount,
0,
distribution,
flags
);
}
}