125 lines
4.6 KiB
Solidity
125 lines
4.6 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 {InitializableOwnable} from "../../lib/InitializableOwnable.sol";
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import {ReentrancyGuard} from "../../lib/ReentrancyGuard.sol";
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import {IQuota} from "../../DODOFee/UserQuota.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 {IERC20} from "../../intf/IERC20.sol";
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import {SafeERC20} from "../../lib/SafeERC20.sol";
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contract InstantFunding is InitializableOwnable, ReentrancyGuard {
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using SafeMath for uint256;
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using SafeERC20 for IERC20;
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// ============ Token & Balance ============
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uint256 public _FUNDS_RESERVE_;
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address public _FUNDS_ADDRESS_;
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address public _TOKEN_ADDRESS_;
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uint256 public _TOTAL_TOKEN_AMOUNT_;
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// ============ Instant Commit Mode ============
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uint256 public _START_TIME_;
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uint256 public _DURATION_;
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uint256 public _START_PRICE_;
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uint256 public _END_PRICE_;
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address _QUOTA_;
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mapping(address => uint256) _FUNDS_USED_;
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mapping(address => uint256) _FUNDS_UNUSED_;
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mapping(address => uint256) _TOKEN_ALLOCATION_;
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uint256 public _TOTAL_ALLOCATED_TOKEN_;
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uint256 public _TOTAL_RAISED_FUNDS_;
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// ============ View Functions ============
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function getCurrentPrice() public view returns (uint256 price) {
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if (block.timestamp <= _START_TIME_) {
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price = _START_PRICE_;
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} else if (block.timestamp >= _START_TIME_.add(_DURATION_)) {
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price = _END_PRICE_;
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} else {
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uint256 timePast = block.timestamp.sub(_START_TIME_);
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price = _START_PRICE_.mul(timePast).div(_DURATION_).add(
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_END_PRICE_.mul(_DURATION_.sub(timePast)).div(_DURATION_)
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);
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}
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}
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function getUserTokenAllocation(address user) public view returns (uint256) {
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return _TOKEN_ALLOCATION_[user];
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}
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function getUserFundsUnused(address user) public view returns (uint256) {
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return _FUNDS_UNUSED_[user];
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}
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function getUserFundsUsed(address user) public view returns (uint256) {
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return _FUNDS_USED_[user];
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}
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// ============ Funding Functions ============
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function depositToken(uint256 amount) external preventReentrant onlyOwner {
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require(block.timestamp < _START_TIME_, "FUNDING_ALREADY_STARTED");
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IERC20(_TOKEN_ADDRESS_).safeTransferFrom(msg.sender, address(this), amount);
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_TOTAL_TOKEN_AMOUNT_ = _TOTAL_TOKEN_AMOUNT_.add(amount);
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}
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function depositFunds(address to)
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external
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preventReentrant
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returns (uint256 newTokenAllocation)
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{
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// input fund check
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uint256 inputFund = IERC20(_FUNDS_ADDRESS_).balanceOf(address(this)).sub(_FUNDS_RESERVE_);
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_FUNDS_RESERVE_ = _FUNDS_RESERVE_.add(inputFund);
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if (_QUOTA_ != address(0)) {
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require(
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inputFund.add(_FUNDS_USED_[to]) <= uint256(IQuota(_QUOTA_).getUserQuota(to)),
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"QUOTA_EXCEED"
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);
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}
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// allocation calculation
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uint256 currentPrice = getCurrentPrice();
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newTokenAllocation = DecimalMath.divFloor(inputFund, currentPrice);
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if (newTokenAllocation.add(_TOTAL_ALLOCATED_TOKEN_) > _TOTAL_TOKEN_AMOUNT_) {
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newTokenAllocation = _TOTAL_TOKEN_AMOUNT_.sub(_TOTAL_ALLOCATED_TOKEN_);
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uint256 fundUsed = DecimalMath.mulFloor(newTokenAllocation, currentPrice);
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_FUNDS_USED_[to] = _FUNDS_USED_[to].add(fundUsed);
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_TOTAL_RAISED_FUNDS_ = _TOTAL_RAISED_FUNDS_.add(fundUsed);
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_FUNDS_UNUSED_[to] = _FUNDS_UNUSED_[to].add(inputFund.sub(fundUsed));
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} else {
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_FUNDS_USED_[to] = _FUNDS_USED_[to].add(inputFund);
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_TOTAL_RAISED_FUNDS_ = _TOTAL_RAISED_FUNDS_.add(inputFund);
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}
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_TOKEN_ALLOCATION_[to] = _TOKEN_ALLOCATION_[to].add(newTokenAllocation);
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_TOTAL_ALLOCATED_TOKEN_ = _TOTAL_ALLOCATED_TOKEN_.add(newTokenAllocation);
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}
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function withdrawFunds(address to, uint256 amount) external preventReentrant {
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require(_FUNDS_UNUSED_[msg.sender] >= amount, "UNUSED_FUND_NOT_ENOUGH");
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_FUNDS_UNUSED_[msg.sender] = _FUNDS_UNUSED_[msg.sender].sub(amount);
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IERC20(_FUNDS_ADDRESS_).safeTransfer(to, amount);
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_FUNDS_RESERVE_ = _FUNDS_RESERVE_.sub(amount);
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}
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function withdrawUnallocatedToken(address to) external preventReentrant onlyOwner {
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IERC20(_TOKEN_ADDRESS_).safeTransfer(to, _TOTAL_TOKEN_AMOUNT_.sub(_TOTAL_ALLOCATED_TOKEN_));
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_TOTAL_TOKEN_AMOUNT_ = _TOTAL_ALLOCATED_TOKEN_;
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}
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}
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