74 lines
2.4 KiB
Solidity
74 lines
2.4 KiB
Solidity
/*
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Copyright 2020 DODO ZOO.
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SPDX-License-Identifier: Apache-2.0
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*/
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pragma solidity 0.6.9;
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pragma experimental ABIEncoderV2;
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import {IERC20} from "../intf/IERC20.sol";
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import {SafeMath} from "../lib/SafeMath.sol";
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import {DecimalMath} from "../lib/DecimalMath.sol";
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import {Ownable} from "../lib/Ownable.sol";
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interface IDODOCirculationHelper {
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// vDODO 锁仓不算流通
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function getCirculation() external returns (uint256);
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function getVDODOWithdrawFeeRatio() external returns (uint256);
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}
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contract DODOCirculationHelper is Ownable {
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using SafeMath for uint256;
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// ============ Storage ============
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address immutable _DODO_TOKEN_;
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address[] _LOCKED_CONTRACT_ADDRESS_;
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uint256 public _MIN_PENALTY_RATIO_ = 5 * 10**16; // 5%
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uint256 public _MAX_PENALTY_RATIO_ = 15 * 10**16; // 15%
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constructor(address dodoToken) public {
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_DODO_TOKEN_ = dodoToken;
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} // todo
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function addLockedContractAddress(address lockedContract) external onlyOwner {} // todo
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function removeLockedContractAddress(address lockedContract) external onlyOwner {} // todo
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function getCirculation() public view returns (uint256 circulation) {
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circulation = 10**9;
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//TODO circulation 需要乘以decimals吗?
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for (uint256 i = 0; i < _LOCKED_CONTRACT_ADDRESS_.length; i++) {
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circulation -= IERC20(_DODO_TOKEN_).balanceOf(_LOCKED_CONTRACT_ADDRESS_[i]);
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}
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}
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function getVDODOWithdrawFeeRatio() external view returns (uint256 ratio) {
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uint256 dodoCirculationAmout = getCirculation();
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// (x - 1)^2 / 81 + (y - 15)^2 / 100 = 1
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// y = 5% (x ≤ 1)
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// y = 15% (x ≥ 10)
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// y = 15% - 10% * sqrt(1-[(x-1)/9]^2)
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uint256 x =
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DecimalMath.divCeil(
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dodoCirculationAmout,
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IERC20(_DODO_TOKEN_).balanceOf(address(this))// TODO 这里应该是vdodo的值吧？
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);
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if (x <= 10**18) {
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return _MIN_PENALTY_RATIO_;
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} else if (x >= 10**19) {
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return _MAX_PENALTY_RATIO_;
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} else {
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uint256 xTemp = x.sub(DecimalMath.ONE).div(9);
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uint256 premium = DecimalMath.ONE2.sub(xTemp.mul(xTemp)).sqrt();
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ratio =
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_MAX_PENALTY_RATIO_ -
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DecimalMath.mulFloor(_MAX_PENALTY_RATIO_ - _MIN_PENALTY_RATIO_, premium);
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}
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}
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}
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