100 EXP
Submission Details
Impact:
Likelihood:
Missing ERC-20 Events
Author Revealed upon completion
Root + Impact
Description
-
Describe the normal behavior in one or more sentences
-
Explain the specific issue or problem in one or more sentences
// I rewritten this code and added Missing ERC-20 Events
// This is the code
// SPDX-License-Identifier: MIT
import {ERC20Internals} from "./helpers/ERC20Internals.sol";
import {IERC20Errors} from "./helpers/IERC20Errors.sol";
contract ERC20 is IERC20Errors, ERC20Internals {
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual returns (uint8) {
return 18;
}
function totalSupply() public view virtual returns (uint256) {
return totalSupply_();
}
function balanceOf(address owner) public view virtual returns (uint256) {
return _balanceOf(owner);
}
function transfer(address to, uint256 value) public virtual returns (bool success) {
success = _transfer(msg.sender, to, value);
}
function transferFrom(address from, address to, uint256 value) public virtual returns (bool success) {
address spender = msg.sender;
_spendAllowance(from, spender, value);
success = _transfer(from, to, value);
}
function approve(address spender, uint256 value) public virtual returns (bool success) {
address owner = msg.sender;
success = _approve(owner, spender, value);
}
function allowance(address owner, address spender) public view virtual returns (uint256) {
return _allowance(owner, spender);
}
}
Risk
Likelihood:
-
Reason 1 Missing events
-
Reason 2 Zero-address protection
Impact:
-
Impact 1 Correct transfer/transferFrom behavior
-
Impact 2 Correct approve behavior
Proof of Concept
// Its my first submission of vulnerability
// Hope you like it
// Thank You
Recommended Mitigation
+ add this code
Rewards breakdown
nSLOC
222This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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