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add Curve 3pool to 1proto #46

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add Curve 3pool to 1proto #46

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1 change: 1 addition & 0 deletions contracts/IOneSplit.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,7 @@ contract IOneSplitConsts {
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;
uint256 internal constant FLAG_DISABLE_CURVE_3pool= 0x100000000000000000;
}


Expand Down
54 changes: 50 additions & 4 deletions contracts/OneSplitBase.sol
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Expand Up @@ -80,7 +80,7 @@ contract OneSplitRoot is IOneSplitView {
using UniswapV2ExchangeLib for IUniswapV2Exchange;
using ChaiHelper for IChai;

uint256 constant internal DEXES_COUNT = 34;
uint256 constant internal DEXES_COUNT = 35;
IERC20 constant internal ETH_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
IERC20 constant internal ZERO_ADDRESS = IERC20(0);

Expand Down Expand Up @@ -118,6 +118,7 @@ contract OneSplitRoot is IOneSplitView {
ICurve constant internal curveRenBTC = ICurve(0x93054188d876f558f4a66B2EF1d97d16eDf0895B);
ICurve constant internal curveTBTC = ICurve(0x9726e9314eF1b96E45f40056bEd61A088897313E);
ICurve constant internal curveSBTC = ICurve(0x7fC77b5c7614E1533320Ea6DDc2Eb61fa00A9714);
ICurve constant internal curve3pool = ICurve(0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7);
IShell constant internal shell = IShell(0xA8253a440Be331dC4a7395B73948cCa6F19Dc97D);
IAaveLendingPool constant internal aave = IAaveLendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119);
ICompound constant internal compound = ICompound(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
Expand Down Expand Up @@ -479,7 +480,8 @@ contract OneSplitView is IOneSplitView, OneSplitRoot {
true, // "Kyber 4"
true, // "Mooniswap 2"
true, // "Mooniswap 3"
true // "Mooniswap 4"
true, // "Mooniswap 4"
true // "Curve 3pool"
];

for (uint i = 0; i < DEXES_COUNT; i++) {
Expand Down Expand Up @@ -541,7 +543,8 @@ contract OneSplitView is IOneSplitView, OneSplitRoot {
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
invert != flags.check(FLAG_DISABLE_MOONISWAP_ALL | FLAG_DISABLE_MOONISWAP_USDC) ? _calculateNoReturn : calculateMooniswapOverUSDC,
invert != flags.check(FLAG_DISABLE_CURVE_ALL | FLAG_DISABLE_CURVE_3pool) ? _calculateNoReturn : calculateCurve3pool
];
}

Expand Down Expand Up @@ -987,6 +990,28 @@ contract OneSplitView is IOneSplitView, OneSplitRoot {
), 150_000);
}

function calculateCurve3pool(
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,
curve3pool,
false,
tokens
), 130_000);
}

function calculateShell(
IERC20 fromToken,
IERC20 destToken,
Expand Down Expand Up @@ -1838,7 +1863,8 @@ contract OneSplit is IOneSplit, OneSplitRoot {
_swapOnKyber4,
_swapOnMooniswapETH,
_swapOnMooniswapDAI,
_swapOnMooniswapUSDC
_swapOnMooniswapUSDC,
_swapOnCurve3pool
];

require(distribution.length <= reserves.length, "OneSplit: Distribution array should not exceed reserves array size");
Expand Down Expand Up @@ -2097,6 +2123,26 @@ contract OneSplit is IOneSplit, OneSplitRoot {
curveSBTC.exchange(i - 1, j - 1, amount, 0);
}

function _swapOnCurve3pool(
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(curveSBTC), amount);
curve3pool.exchange(i - 1, j - 1, amount, 0);
}

function _swapOnDforceSwap(
IERC20 fromToken,
IERC20 destToken,
Expand Down
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