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@wolz-CODElife
Created June 17, 2022 00:18
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//SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
// Import the necessary files and lib
import "./Interfaces/IERC4626.sol";
import "./Interfaces/IERC20.sol";
import "https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol";
// create your contract and inherit the your imports
contract TokenizedVault is IERC4626, ERC20 {
// create an event that will the withdraw and deposit function
event Deposit(address caller, uint256 amt);
event Withdraw(address caller, uint256 amt, uint256 per);
// create your variables and immutables
ERC20 public immutable asset;
// a mapping that checks if a user has deposited
mapping(address => uint256) shareHolder;
constructor(ERC20 _underlying, string memory _name, string memory _symbol )
ERC20(_name, _symbol, 18) {
asset = _underlying;
}
// DEPOSIT/WITHDRAWAL LOGIC
// a deposit function that receives assets fron users
function deposit(uint256 assets) public{
// checks that the deposit is higher than 0
require (assets > 0, "Deposit less than Zero");
asset.transferFrom(msg.sender, address(this), assets);
// checks the value of assets the holder has
shareHolder[msg.sender] += assets;
// mints the reciept(shares)
_mint(msg.sender, assets);
emit Deposit(msg.sender, assets);
}
// returns total number of assets
function totalAssets() public view override returns(uint256) {
return asset.balanceOf(address(this));
}
// users to return shares and get thier token back before they can withdraw, and requiers that the user has a deposit
function redeem(uint256 shares, address receiver ) internal returns (uint256 assets) {
require(shareHolder[msg.sender] > 0, "Not a share holder");
shareHolder[msg.sender] -= shares;
uint256 per = (10 * shares) / 100;
_burn(msg.sender, shares);
assets =shares + per;
emit Withdraw(receiver, assets, per);
return assets;
}
// allow msg.sender to withdraw his deposit plus interest
function withdraw(uint256 shares, address receiver) public {
uint256 payout = redeem(shares, receiver);
asset.transfer(receiver, payout);
}
}
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