COS

0x7d3cb11f8c13730c24d01826d8f2005f0e1b348f Copy

ERC20

This contract is an ERC20 token.

Name COS

Symbol COS

Decimals 18

Total Supply 200,000,000 COS

About

Stats

Public Functions 14

Event Types 2

Code Size 14,965 bytes

Events (2)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (6)

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_decimals Variable

uint8

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowances Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

Functions Expand All Collapse All

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalSupply() public view returns (uint256) {
  return _totalSupply;
}

balanceOf

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address account) public view returns (uint256) {
  return _balances[account];
}

transfer

Parameters

Name	Type
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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) public returns (bool) {
  _transfer(msg.sender, recipient, amount);
  return true;
}

allowance

Parameters

Name	Type
owner	address
spender	address

Properties

Visibility public

Mutability view

Source Code

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

burn

Parameters

Name	Type
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function burn(uint256 amount) public {
  _burn(msg.sender, amount);
}

burnFrom

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

account must not be equal to UNKNOWN VALUE

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

Source Code

function burnFrom(address account, uint256 amount) public {
  _burnFrom(account, amount);
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

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

Source Code

function approve(address spender, uint256 value) public returns (bool) {
  _approve(msg.sender, spender, value);
  return true;
}

transferFrom

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

recipient must not be equal to UNKNOWN VALUE

account must not be equal to UNKNOWN VALUE

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

Source Code

function transferFrom(
  address sender,
  address recipient,
  uint256 amount
) public returns (bool) {
  _transfer(sender, recipient, amount);
  _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
  return true;
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

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

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  public
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowances[msg.sender][spender].add(addedValue)
  );
  return true;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

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

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowances[msg.sender][spender].sub(subtractedValue)
  );
  return true;
}

airdrop

Parameters

Name	Type
_recipients	address[]
_values	uint256[]

Properties

Visibility public

Mutability transaction

Requirements

the number of values in _recipients must be equal to the number of values in _values

Source Code

function airdrop(address[] calldata _recipients, uint256[] calldata _values)
  external
  returns (bool)
{
  require(_recipients.length == _values.length, "Inconsistent data lengths");
  uint256 senderBalance = _balances[msg.sender];
  uint256 length = _values.length;
  for (uint256 i = 0; i < length; i++) {
    uint256 value = _values[i];
    address to = _recipients[i];
    require(senderBalance >= value, "Insufficient Balance");
    require(to != address(0), "Address is Null");
    if (msg.sender != _recipients[i]) {
      transfer(to, value);
    }
  }
  return true;
}

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function name() public view returns (string memory) {
  return _name;
}

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function symbol() public view returns (string memory) {
  return _symbol;
}

decimals

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function decimals() public view returns (uint8) {
  return _decimals;
}

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 ERC20._transfer

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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 {
  require(sender != address(0), "ERC20: transfer from the zero address");
  require(recipient != address(0), "ERC20: transfer to the zero address");

  _balances[sender] = _balances[sender].sub(amount);
  _balances[recipient] = _balances[recipient].add(amount);
  emit Transfer(sender, recipient, amount);
}

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0), "ERC20: burn from the zero address");

  _totalSupply = _totalSupply.sub(value);
  _balances[account] = _balances[account].sub(value);
  emit Transfer(account, address(0), value);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

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

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(owner != address(0), "ERC20: approve from the zero address");
  require(spender != address(0), "ERC20: approve to the zero address");

  _allowances[owner][spender] = value;
  emit Approval(owner, spender, value);
}

internal ERC20._burnFrom

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

account must not be equal to UNKNOWN VALUE

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

Source Code

function _burnFrom(address account, uint256 amount) internal {
  _burn(account, amount);
  _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
}

COS

ERC20

About

Stats

Events (2) keyboard_arrow_up

Approval 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.

State Variables (6) keyboard_arrow_up

_name Variable

_symbol Variable

_decimals Variable

_balances Variable

_allowances Variable

_totalSupply Variable

Functions Expand All Collapse All

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

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

transfer 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

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

burn 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

burnFrom 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

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.

Source Code

transferFrom 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

increaseAllowance 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

decreaseAllowance 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

airdrop 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

name 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

symbol 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

decimals keyboard_arrow_up

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

Properties

Events (2)

Parameters

Parameters

State Variables (6)

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

allowance

Parameters

burn

Parameters

Requirements

burnFrom

Parameters

Requirements

approve

Parameters

Requirements

transferFrom

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

airdrop

Parameters

Requirements

name

Parameters

symbol

Parameters

decimals

Parameters

internal ERC20._transfer

Parameters

Requirements

internal ERC20._burn

Parameters

Requirements

internal ERC20._approve

Parameters

Requirements

internal ERC20._burnFrom

Parameters

Requirements