72 lines
2.5 KiB
Solidity
72 lines
2.5 KiB
Solidity
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/*
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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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import {IDODOApproveProxy} from "../DODOApproveProxy.sol";
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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 {SafeERC20} from "../../lib/SafeERC20.sol";
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import {ReentrancyGuard} from "../../lib/ReentrancyGuard.sol";
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interface IDODODrops {
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function _BUY_TOKEN_() external view returns (address);
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function _FEE_MODEL_() external view returns (address);
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function getSellingInfo() external view returns (uint256, uint256, uint256);
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function buyTickets(address assetTo, uint256 ticketAmount) external;
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}
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interface IDropsFeeModel {
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function getPayAmount(address mysteryBox, address user, uint256 originalPrice, uint256 ticketAmount) external view returns (uint256, uint256);
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}
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/**
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* @title DODO DropsProxy
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* @author DODO Breeder
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*
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* @notice Entrance of Drops in DODO platform
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*/
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contract DODODropsProxy is ReentrancyGuard {
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using SafeMath for uint256;
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// ============ Storage ============
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address constant _BASE_COIN_ = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
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address public immutable _DODO_APPROVE_PROXY_;
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// ============ Events ============
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event BuyTicket(address indexed account, address indexed mysteryBox, uint256 ticketAmount);
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fallback() external payable {}
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receive() external payable {}
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constructor(address dodoApproveProxy) public {
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_DODO_APPROVE_PROXY_ = dodoApproveProxy;
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}
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function buyTickets(address payable dodoDrops, uint256 ticketAmount) external payable preventReentrant {
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(uint256 curPrice, uint256 sellAmount,) = IDODODrops(dodoDrops).getSellingInfo();
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require(curPrice > 0 && sellAmount > 0, "CAN_NOT_BUY");
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require(ticketAmount <= sellAmount, "TICKETS_NOT_ENOUGH");
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address feeModel = IDODODrops(dodoDrops)._FEE_MODEL_();
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(uint256 payAmount,) = IDropsFeeModel(feeModel).getPayAmount(dodoDrops, msg.sender, curPrice, ticketAmount);
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require(payAmount > 0, "UnQualified");
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address buyToken = IDODODrops(dodoDrops)._BUY_TOKEN_();
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if(buyToken == _BASE_COIN_) {
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require(msg.value == payAmount, "PAYAMOUNT_NOT_ENOUGH");
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dodoDrops.transfer(payAmount);
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}else {
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IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(buyToken, msg.sender, dodoDrops, payAmount);
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}
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IDODODrops(dodoDrops).buyTickets(msg.sender, ticketAmount);
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emit BuyTicket(msg.sender, dodoDrops, ticketAmount);
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}
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} |