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WrappedNative.sol
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WrappedNative.sol
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pragma solidity ^0.5.15;
// From: https://etherscan.io/address/0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2#code
contract WrappedNative {
string public name;
string public symbol;
uint8 public decimals = 18;
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
event Deposit(address indexed dst, uint wad);
event Withdrawal(address indexed src, uint wad);
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
constructor(string memory _name, string memory _symbol)
public
{
name = _name;
symbol = _symbol;
}
function()
external
payable
{
deposit();
}
function deposit()
public
payable
{
balanceOf[msg.sender] += msg.value;
emit Deposit(msg.sender, msg.value);
}
function withdraw(uint wad)
public
{
require(balanceOf[msg.sender] >= wad, "Insufficient funds");
balanceOf[msg.sender] -= wad;
msg.sender.transfer(wad);
emit Withdrawal(msg.sender, wad);
}
function totalSupply()
public
view
returns (uint)
{
return address(this).balance;
}
function approve(address guy, uint wad)
public
returns (bool)
{
allowance[msg.sender][guy] = wad;
emit Approval(msg.sender, guy, wad);
return true;
}
function transfer(address dst, uint wad)
public
returns (bool)
{
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public
returns (bool)
{
require(balanceOf[src] >= wad, "Insufficient funds");
if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
require(allowance[src][msg.sender] >= wad, "Insufficient funds");
allowance[src][msg.sender] -= wad;
}
balanceOf[src] -= wad;
balanceOf[dst] += wad;
emit Transfer(src, dst, wad);
return true;
}
}