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deposit multi token to single token

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This commit is contained in:
Samyak Jain 2020-05-05 18:29:17 +10:00
parent 373fb858ad
commit 089a4d62c1
1 changed files with 31 additions and 48 deletions
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79
contracts/connectors/curve.sol
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@ -8,51 +8,32 @@ import { DSMath } from "../common/math.sol";
interface ICurve {
function get_virtual_price() external returns (uint256 out);
function underlying_coins(int128 i) external view returns (address token);
function underlying_coins(int128 tokenId) external view returns (address token);
function calc_token_amount(uint256[4] calldata amounts, bool deposit) external returns (uint256 amount);
function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external;
function get_dy(int128 i, int128 j, uint256 dx)
external
returns (uint256 out);
function get_dy(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt) external returns (uint256 buyTokenAmt);
function get_dy_underlying(int128 i, int128 j, uint256 dx)
external
returns (uint256 out);
// Used when there's an underlying token. Example:- cdai, cusdc, etc. If not then
function get_dy_underlying(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt) external returns (uint256 buyTokenAmt);
function exchange(
int128 sellTokenId,
int128 buyTokenId,
uint256 sellTokenAmt,
uint256 minBuyToken
) external;
function exchange(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt, uint256 minBuyToken) external;
function exchange_underlying(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
// Used when there's an underlying token. Example:- cdai, cusdc, etc.
function exchange_underlying(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt, uint256 minBuyToken) external;
function remove_liquidity(
uint256 _amount,
uint256[4] calldata min_amounts
) external;
function remove_liquidity(uint256 _amount, uint256[4] calldata min_amounts) external;
function remove_liquidity_imbalance(uint256[4] calldata amounts, uint256 max_burn_amount)
external;
function remove_liquidity_imbalance(uint256[4] calldata amounts, uint256 max_burn_amount) external;
}
interface ICurveZap {
function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external returns (uint256 amount);
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
function remove_liquidity_one_coin(uint256 _token_amount, int128 i, uint256 min_uamount) external;
}
@ -122,6 +103,7 @@ contract CurveProtocol is CurveHelpers {
uint256 getId,
uint256 setId
);
event LogDeposit(uint256 amts, uint256 mintAmt, uint256 getId, uint256 setId);
event LogDepositLiquidity(uint256[4] amts, uint256 mintAmt, uint256[4] getId, uint256 setId);
event LogWithdrawLiquidityImbalance(uint256[4] amts, uint256 burnAmt, uint256[4] getId, uint256 setId);
event LogWithdrawLiquidityOneCoin(address receiveCoin, uint256 withdrawnAmt, uint256 curveAmt, uint256 getId, uint256 setId);
@ -144,7 +126,7 @@ contract CurveProtocol is CurveHelpers {
uint _sellAmt18 = convertTo18(_sellToken.decimals(), _sellAmt);
uint _slippageAmt = convert18ToDec(_buyToken.decimals(), wmul(unitAmt, _sellAmt18));
uint _buyAmt = curve.get_dy_underlying(getTokenI(sellAddr), getTokenI(buyAddr), _sellAmt);
uint _buyAmt = curve.get_dy(getTokenI(sellAddr), getTokenI(buyAddr), _sellAmt);
curve.exchange(getTokenI(sellAddr), getTokenI(buyAddr), _sellAmt, _slippageAmt);
@ -157,26 +139,27 @@ contract CurveProtocol is CurveHelpers {
}
function deposit(uint256[4] calldata amounts, uint256 slippage, uint256[4] calldata getId, uint256 setId) external {
uint256[4] memory _amts;
ICurve curve = ICurve(getCurveSwapAddr());
function deposit(address token, uint amt, uint unitAmt, uint getId, uint setId) external {
uint256 _amt = getUint(getId, amt);
for(uint256 i = 0; i < 4; i++) {
uint256 _amt = getUint(getId[i], amounts[i]);
TokenInterface token = TokenInterface(getTokenAddr(curve, i));
_amt = _amt == uint(-1) ? token.balanceOf(address(this)) : _amt;
_amts[i] = _amt;
if(_amt == 0) continue;
token.approve(address(curve), _amt);
}
uint[4] memory _amts;
_amts[uint(getTokenI(token))] = _amt;
uint256 min_mint_amount = ICurve(address(curve)).calc_token_amount(_amts, true);
curve.add_liquidity(_amts, mul(min_mint_amount, sub(100, slippage)) / 100);
uint _amt18 = convertTo18(TokenInterface(token).decimals(), amt);
uint _slippageAmt = wmul(unitAmt, _amt18);
uint256 mintAmount = TokenInterface(getCurveTokenAddr()).balanceOf(address(this));
emit LogDepositLiquidity(_amts, mintAmount, getId, setId);
bytes32 _eventCode = keccak256("LogDepositLiquidity(uint256[],uint256,uint256[],uint256)");
bytes memory _eventParam = abi.encode(_amts, mintAmount, getId, setId);
TokenInterface curveTokenContract = TokenInterface(getCurveTokenAddr());
uint initialCurveBal = curveTokenContract.balanceOf(address(this));
ICurve(getCurveSwapAddr()).add_liquidity(_amts, _slippageAmt);
uint finalCurveBal = curveTokenContract.balanceOf(address(this));
uint mintAmt = sub(finalCurveBal, initialCurveBal);
emit LogDeposit(_amt, mintAmt, getId, setId);
bytes32 _eventCode = keccak256("LogDepositLiquidity(uint256,uint256,uint256,uint256)");
bytes memory _eventParam = abi.encode(_amt, mintAmt, getId, setId);
emitEvent(_eventCode, _eventParam);
}