Address Contract Partially Verified
Address
0x674C6Ad92Fd080e4004b2312b45f796a192D27a0
Balance
0 ETH
Nonce
1
Code Size
6694 bytes
Creator
0x90f85042...cd7D at tx 0x0a8a492d...8d5fde
Indexed Transactions
0
Contract Bytecode
6694 bytes
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Verified Source Code Partial Match
Compiler: v0.6.8+commit.0bbfe453
EVM: istanbul
Optimization: Yes (200 runs)
USDN.sol 308 lines
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.8;
interface Staking {
function deposit(address account, uint256 amount) external returns (bool);
function withdraw(address account) external returns (bool);
function stake(uint256 reward) external returns (bool);
event Reward(uint256 id, uint256 amount);
}
interface ERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function increaseAllowance(address spender, uint256 addedValue) external returns (bool);
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
abstract contract Ownable {
address private _owner;
address private _admin;
constructor () public {
_owner = msg.sender;
_admin = msg.sender;
}
modifier onlyOwner() {
require(_owner == msg.sender || _admin == msg.sender, "Ownable: caller is not the owner or admin");
_;
}
function transferOwnership(address newOwner) external virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_owner = newOwner;
}
}
abstract contract Deprecateble is Ownable {
bool internal deprecated;
modifier onlyNotDeprecated() {
require(!deprecated, "Deprecateble: contract is deprecated");
_;
}
function deprecate() external onlyOwner {
deprecated = true;
emit Deprecate(msg.sender);
}
event Deprecate(address indexed account);
}
abstract contract StandartToken is Staking, ERC20, Ownable, Deprecateble {
uint256[] private _percents;
uint256 private _liquidTotalSupply;
uint256 private _liquidDeposit;
uint256 constant private PERCENT_FACTOR = 10 ** 12;
mapping(address => uint256) private _balances;
mapping(address => uint256) private _deposits;
mapping(address => uint256) private _rewardIndexForAccount;
mapping(address => mapping(address => uint256)) private _allowances;
constructor () public {
_percents.push(PERCENT_FACTOR);
}
function deposit(address account, uint256 amount) external onlyOwner onlyNotDeprecated override virtual returns (bool) {
require(amount > 0, "amount should be > 0");
require(account != address(0), "deposit to the zero address");
uint256 liquidDeposit = _liquidDeposit;
require(liquidDeposit + amount >= liquidDeposit, "addition overflow for deposit");
_liquidDeposit = liquidDeposit + amount;
uint256 oldDeposit = _deposits[account];
if (oldDeposit == 0) {
_balances[account] = balanceOf(account);
_rewardIndexForAccount[account] = _percents.length - 1;
_deposits[account] = amount;
} else {
uint256 rewardIndex = _rewardIndexForAccount[account];
if (rewardIndex == _percents.length - 1) {
require(oldDeposit + amount >= oldDeposit, "addition overflow for deposit");
_deposits[account] = oldDeposit + amount;
} else {
_balances[account] = balanceOf(account);
_rewardIndexForAccount[account] = _percents.length - 1;
_deposits[account] = amount;
}
}
emit Transfer(address(0), account, amount);
return true;
}
function stake(uint256 reward) external onlyOwner onlyNotDeprecated override virtual returns (bool) {
require(reward > 0, "reward should be > 0");
uint256 liquidTotalSupply = _liquidTotalSupply;
uint256 liquidDeposit = _liquidDeposit;
if (liquidTotalSupply == 0) {
_percents.push(PERCENT_FACTOR);
} else {
uint256 oldPercent = _percents[_percents.length - 1];
uint256 percent = reward * PERCENT_FACTOR / liquidTotalSupply;
require(percent + PERCENT_FACTOR >= percent, "addition overflow for percent");
uint256 newPercent = percent + PERCENT_FACTOR;
_percents.push(newPercent * oldPercent / PERCENT_FACTOR);
require(liquidTotalSupply + reward >= liquidTotalSupply, "addition overflow for total supply + reward");
liquidTotalSupply = liquidTotalSupply + reward;
}
require(liquidTotalSupply + liquidDeposit >= liquidTotalSupply, "addition overflow for total supply");
_liquidTotalSupply = liquidTotalSupply + liquidDeposit;
_liquidDeposit = 0;
emit Reward(_percents.length, reward);
return true;
}
function withdraw(address account) external onlyOwner onlyNotDeprecated override virtual returns (bool) {
uint256 oldDeposit = _deposits[account];
uint256 rewardIndex = _rewardIndexForAccount[account];
if (rewardIndex == _percents.length - 1) {
uint256 balance = _balances[account];
require(balance <= _liquidTotalSupply, "subtraction overflow for total supply");
_liquidTotalSupply = _liquidTotalSupply - balance;
require(oldDeposit <= _liquidDeposit, "subtraction overflow for liquid deposit");
_liquidDeposit = _liquidDeposit - oldDeposit;
require(balance + oldDeposit >= balance, "addition overflow for total balance + oldDeposit");
emit Transfer(account, address(0), balance + oldDeposit);
} else {
uint256 balance = balanceOf(account);
uint256 liquidTotalSupply = _liquidTotalSupply;
require(balance <= liquidTotalSupply, "subtraction overflow for total supply");
_liquidTotalSupply = liquidTotalSupply - balance;
emit Transfer(account, address(0), balance);
}
_balances[account] = 0;
_deposits[account] = 0;
return true;
}
// ERC20
function totalSupply() external view override virtual returns (uint256) {
uint256 liquidTotalSupply = _liquidTotalSupply;
uint256 liquidDeposit = _liquidDeposit;
require(liquidTotalSupply + liquidDeposit >= liquidTotalSupply, "addition overflow for total supply");
return liquidTotalSupply + liquidDeposit;
}
function balanceOf(address account) public view override virtual returns (uint256) {
uint256 balance = _balances[account];
uint256 oldDeposit = _deposits[account];
if (balance == 0 && oldDeposit == 0) {
return 0;
}
uint256 rewardIndex = _rewardIndexForAccount[account];
if (rewardIndex == _percents.length - 1) {
require(balance + oldDeposit >= balance, "addition overflow for balance");
return balance + oldDeposit;
}
if (oldDeposit == 0) {
uint256 profit = _percents[_percents.length - 1];
return profit * balance / _percents[rewardIndex];
} else {
uint256 newBalance = balance * _percents[_percents.length - 1] / _percents[rewardIndex];
uint256 profit = oldDeposit * _percents[_percents.length - 1] / _percents[rewardIndex + 1];
require(profit + newBalance >= newBalance, "addition overflow for balance");
return profit + newBalance;
}
}
function allowance(address owner, address spender) external view override virtual returns (uint256) {
return _allowances[owner][spender];
}
function _approve(address owner, address spender, uint256 amount) internal onlyNotDeprecated virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function approve(address spender, uint256 amount) external override virtual returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external override virtual returns (bool) {
uint256 temp = _allowances[msg.sender][spender];
require(temp + addedValue >= temp, "addition overflow");
_approve(msg.sender, spender, temp + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external override virtual returns (bool) {
uint256 temp = _allowances[msg.sender][spender];
require(subtractedValue <= temp, "ERC20: decreased allowance below zero");
_approve(msg.sender, spender, temp - subtractedValue);
return true;
}
function transfer(address recipient, uint256 amount) external override virtual returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override virtual returns (bool) {
_transfer(sender, recipient, amount);
uint256 temp = _allowances[sender][msg.sender];
require(amount <= temp, "ERC20: transfer amount exceeds allowance");
_approve(sender, msg.sender, temp - amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal onlyNotDeprecated virtual {
require(amount > 0, "amount should be > 0");
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 oldDeposit = _deposits[sender];
uint256 rewardIndex = _rewardIndexForAccount[sender];
uint256 depositDiff = 0;
if (oldDeposit == 0 || rewardIndex != _percents.length - 1) {
uint256 senderBalance = balanceOf(sender);
require(amount <= senderBalance, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_deposits[sender] = 0;
_rewardIndexForAccount[sender] = _percents.length - 1;
} else {
if (amount <= oldDeposit) {
_deposits[sender] = oldDeposit - amount;
depositDiff = amount;
} else {
uint256 senderBalance = _balances[sender];
require(amount - oldDeposit <= senderBalance, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - (amount - oldDeposit);
_deposits[sender] = 0;
depositDiff = oldDeposit;
}
}
oldDeposit = _deposits[recipient];
rewardIndex = _rewardIndexForAccount[recipient];
if (oldDeposit == 0 || rewardIndex != _percents.length - 1) {
uint256 recipientBalance = balanceOf(recipient);
require((amount - depositDiff) + recipientBalance >= recipientBalance, "ERC20: addition overflow for recipient balance");
_balances[recipient] = recipientBalance + (amount - depositDiff);
_rewardIndexForAccount[recipient] = _percents.length - 1;
_deposits[recipient] = depositDiff;
} else {
uint256 recipientBalance = _balances[recipient];
_balances[recipient] = recipientBalance + (amount - depositDiff);
_deposits[recipient] = oldDeposit + depositDiff;
}
emit Transfer(sender, recipient, amount);
}
}
contract USDN is StandartToken {
function name() external pure returns (string memory) {
return "Neutrino USD";
}
function symbol() external pure returns (string memory) {
return "USDN";
}
function decimals() external pure returns (uint8) {
return 18;
}
}
Read Contract
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
Write Contract 10 functions
These functions modify contract state and require a wallet transaction to execute.
approve 0x095ea7b3
address spender
uint256 amount
returns: bool
decreaseAllowance 0xa457c2d7
address spender
uint256 subtractedValue
returns: bool
deposit 0x47e7ef24
address account
uint256 amount
returns: bool
deprecate 0x0fcc0c28
No parameters
increaseAllowance 0x39509351
address spender
uint256 addedValue
returns: bool
stake 0xa694fc3a
uint256 reward
returns: bool
transfer 0xa9059cbb
address recipient
uint256 amount
returns: bool
transferFrom 0x23b872dd
address sender
address recipient
uint256 amount
returns: bool
transferOwnership 0xf2fde38b
address newOwner
withdraw 0x51cff8d9
address account
returns: bool
Token Balances (2)
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