Created
March 5, 2023 00:01
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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.8.3+commit.8d00100c.js&optimize=false&runs=200&gist=
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// SPDX-License-Identifier: GNU GENERAL PUBLIC LICENSE V3 | |
pragma solidity =0.8.3; | |
contract WBNB { | |
string public name = "Wrapped BNB"; | |
string public symbol = "WBNB"; | |
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; | |
receive() 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); | |
balanceOf[msg.sender] -= wad; | |
payable(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); | |
if (src != msg.sender && allowance[src][msg.sender] != type(uint).max) { | |
require(allowance[src][msg.sender] >= wad); | |
allowance[src][msg.sender] -= wad; | |
} | |
balanceOf[src] -= wad; | |
balanceOf[dst] += wad; | |
emit Transfer(src, dst, wad); | |
return true; | |
} | |
} |
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