Neutrino USD

0x674c6ad92fd080e4004b2312b45f796a192d27a0 Copy

ERC20

This contract is an ERC20 token.

Name Neutrino USD

Symbol USDN

Decimals 18

Total Supply 309,281,087 USDN

About

Neutrino USD (USDN) is a cryptocurrency and operates on the Ethereum platform. Neutrino USD has a current supply of 397,595,858.8219527 with 397,595,282.279442 in circulation. The last known price of Neutrino USD is 0.99872197 USD and is up 0.19 over the last 24 hours. It is currently trading on 29 active market(s) with $13,231,386.98 traded over the last 24 hours. More information can be found at https://neutrino.at/.

Stats

Public Functions 16

Event Types 4

Code Size 11,580 bytes

Events (4)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Deprecate Event

Parameters

account

address

Reward Event

Parameters

id	uint256
amount	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

Constants (1)

PERCENT_FACTOR Constant

uint256

UNKNOWN VALUE

State Variables (10)

_percents Variable

uint256[]

Internal Variable

_liquidTotalSupply Variable

uint256

Internal Variable

_liquidDeposit Variable

uint256

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_deposits Variable

mapping(address => uint256)

Internal Variable

_rewardIndexForAccount Variable

mapping(address => uint256)

Internal Variable

_allowances Variable

mapping(address => mapping(address => uint256))

Internal Variable

_owner Variable

address

Internal Variable

_admin Variable

address

Internal Variable

deprecated Variable

bool

Internal Variable

Functions Expand All Collapse All

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

One or more of the following: - _admin must be equal to the sender's address - OR _owner must be equal to the sender's address

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) external virtual onlyOwner {
  require(newOwner != address(0), "Ownable: new owner is the zero address");
  _owner = newOwner;
}

deprecate

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

One or more of the following: - _admin must be equal to the sender's address - OR _owner must be equal to the sender's address

Source Code

function deprecate() external onlyOwner {
  deprecated = true;
  emit Deprecate(msg.sender);
}

deposit

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

One or more of the following: - _admin must be equal to the sender's address - OR _owner must be equal to the sender's address

onlyNotDeprecated checks for the following:

deprecated must not be true

Requirements

amount must be greater than 0

account must not be equal to UNKNOWN VALUE

liquidDeposit must be less than or equal to liquidDeposit + amount

Source Code

function deposit(address account, uint256 amount)
  external
  virtual
  override
  onlyOwner
  onlyNotDeprecated
  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;
}

stake

Parameters

Name	Type
reward	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

One or more of the following: - _admin must be equal to the sender's address - OR _owner must be equal to the sender's address

onlyNotDeprecated checks for the following:

deprecated must not be true

Requirements

reward must be greater than 0

liquidTotalSupply must be less than or equal to liquidTotalSupply + liquidDeposit

Source Code

function stake(uint256 reward)
  external
  virtual
  override
  onlyOwner
  onlyNotDeprecated
  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;
}

withdraw

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

One or more of the following: - _admin must be equal to the sender's address - OR _owner must be equal to the sender's address

onlyNotDeprecated checks for the following:

deprecated must not be true

Source Code

function withdraw(address account)
  external
  virtual
  override
  onlyOwner
  onlyNotDeprecated
  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;
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Requirements

liquidTotalSupply must be less than or equal to liquidTotalSupply + liquidDeposit

Source Code

function totalSupply() external view virtual override returns (uint256) {
  uint256 liquidTotalSupply = _liquidTotalSupply;
  uint256 liquidDeposit = _liquidDeposit;

  require(
    liquidTotalSupply + liquidDeposit >= liquidTotalSupply,
    "addition overflow for total supply"
  );
  return liquidTotalSupply + liquidDeposit;
}

balanceOf

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address account)
  public
  view
  virtual
  override
  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;
  }
}

allowance

Parameters

Name	Type
owner	address
spender	address

Properties

Visibility public

Mutability view

Source Code

function allowance(address owner, address spender)
  external
  view
  virtual
  override
  returns (uint256)
{
  return _allowances[owner][spender];
}

approve

Parameters

Name	Type
spender	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

spender must not be equal to UNKNOWN VALUE

Source Code

function approve(address spender, uint256 amount)
  external
  virtual
  override
  returns (bool)
{
  _approve(msg.sender, spender, amount);
  return true;
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

temp must be less than or equal to temp + addedValue

the sender's address must not be equal to UNKNOWN VALUE

spender must not be equal to UNKNOWN VALUE

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  external
  virtual
  override
  returns (bool)
{
  uint256 temp = _allowances[msg.sender][spender];
  require(temp + addedValue >= temp, "addition overflow");
  _approve(msg.sender, spender, temp + addedValue);
  return true;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

subtractedValue must be less than or equal to temp

the sender's address must not be equal to UNKNOWN VALUE

spender must not be equal to UNKNOWN VALUE

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  external
  virtual
  override
  returns (bool)
{
  uint256 temp = _allowances[msg.sender][spender];
  require(subtractedValue <= temp, "ERC20: decreased allowance below zero");
  _approve(msg.sender, spender, temp - subtractedValue);
  return true;
}

transfer

Parameters

Name	Type
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

amount must be greater than 0

the sender's address must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

Source Code

function transfer(address recipient, uint256 amount)
  external
  virtual
  override
  returns (bool)
{
  _transfer(msg.sender, recipient, amount);
  return true;
}

transferFrom

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

amount must be greater than 0

the sender's address must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

amount must be less than or equal to temp

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address sender,
  address recipient,
  uint256 amount
) external virtual override 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;
}

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability pure

Source Code

function name() external pure returns (string memory) {
  return "Neutrino USD";
}

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability pure

Source Code

function symbol() external pure returns (string memory) {
  return "USDN";
}

decimals

Parameters

This function has no parameters.

Properties

Visibility public

Mutability pure

Source Code

function decimals() external pure returns (uint8) {
  return 18;
}

Internal Functions Expand All Collapse All

Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.

internal StandartToken._approve

Parameters

Name	Type
owner	address
spender	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Modifiers

onlyNotDeprecated checks for the following:

deprecated must not be true

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 amount
) internal virtual onlyNotDeprecated {
  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);
}

internal StandartToken._transfer

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Modifiers

onlyNotDeprecated checks for the following:

deprecated must not be true

Requirements

amount must be greater than 0

the sender's address must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address sender,
  address recipient,
  uint256 amount
) internal virtual onlyNotDeprecated {
  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);
}

Neutrino USD

ERC20

About link description

Stats

Events (4) keyboard_arrow_up

Approval Event

Parameters help Event parameters list the data that an event contains.

Deprecate Event

Parameters help Event parameters list the data that an event contains.

Reward Event

Parameters help Event parameters list the data that an event contains.

Transfer Event

Parameters help Event parameters list the data that an event contains.

Constants (1) keyboard_arrow_up

PERCENT_FACTOR Constant

State Variables (10) keyboard_arrow_up

_percents Variable

_liquidTotalSupply Variable

_liquidDeposit Variable

_balances Variable

_deposits Variable

_rewardIndexForAccount Variable

_allowances Variable

_owner Variable

_admin Variable

deprecated Variable

Functions Expand All Collapse All

transferOwnership keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

deprecate keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

Source Code

deposit keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

onlyNotDeprecated checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

stake keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

onlyNotDeprecated checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

withdraw keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

onlyNotDeprecated checks for the following:

Source Code

totalSupply keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

balanceOf keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

allowance keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

approve keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

About

Events (4)

Parameters

Parameters

Parameters

Parameters

Constants (1)

State Variables (10)

transferOwnership

Parameters

Modifiers

Requirements

deprecate

Parameters

Modifiers

deposit

Parameters

Modifiers

Requirements

stake

Parameters

Modifiers

Requirements

withdraw

Parameters

Modifiers

totalSupply

Parameters

Requirements

balanceOf

Parameters

allowance

Parameters

approve

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

transfer

Parameters

Requirements

transferFrom

Parameters

Requirements

name

Parameters

symbol

Parameters

decimals

Parameters

internal StandartToken._approve

Parameters

Modifiers

Requirements

internal StandartToken._transfer

Parameters

Modifiers

Requirements