ERC20
This contract is an ERC20 token.
Name
CNN Token
Symbol
CNN
Decimals
18
Total Supply
100,000,000,000 CNN
About
link
Content Neutrality Network (CNN) is a cryptocurrency and operates on the Ethereum platform. Content Neutrality Network has a current supply of 100,000,000,000 with 39,035,223,816 in circulation. The last known price of Content Neutrality Network is 0.00004731 USD and is up 1.93 over the last 24 hours. It is currently trading on 5 active market(s) with $86,360.66 traded over the last 24 hours. More information can be found at https://cnntoken.io/.
Stats
Public Functions
10
Event Types
3
Code Size
8,520 bytes
State Variables (6) keyboard_arrow_up
Functions
balanceOf keyboard_arrow_up
transfer keyboard_arrow_up
Requirements help
Source Code
function transfer(address _to, uint256 _value) public returns (bool) {
return _transfer(msg.sender, _to, _value);
}
transferFrom keyboard_arrow_up
Requirements help
Source Code
function transferFrom(
address _from,
address _to,
uint256 _value
) public returns (bool) {
require(_value <= allowances[_from][msg.sender]); // Check allowance
allowances[_from][msg.sender] -= _value;
return _transfer(_from, _to, _value);
}
approve keyboard_arrow_up
Source Code
function approve(address _spender, uint256 _value) public returns (bool) {
allowances[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
allowance keyboard_arrow_up
approveAndCall keyboard_arrow_up
Source Code
function approveAndCall(
address _spender,
uint256 _value,
bytes _extraData
) public returns (bool) {
if (approve(_spender, _value)) {
TokenRecipient spender = TokenRecipient(_spender);
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
return false;
}
burn keyboard_arrow_up
Requirements help
Source Code
function burn(uint256 _value) public returns (bool) {
require(balances[msg.sender] >= _value); // Check if the sender has enough
balances[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
burnFrom keyboard_arrow_up
Requirements help
Source Code
function burnFrom(address _from, uint256 _value) public returns (bool) {
require(balances[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowances[_from][msg.sender]); // Check allowance
balances[_from] -= _value; // Subtract from the targeted balance
allowances[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
Burn(_from, _value);
return true;
}
increaseApproval keyboard_arrow_up
Requirements help
allowances for the sender's address for _spender + _addedValue
must be greater than
allowances for the sender's address for _spender
Source Code
function increaseApproval(address _spender, uint256 _addedValue)
public
returns (bool)
{
// Check for overflows
require(
allowances[msg.sender][_spender] + _addedValue >
allowances[msg.sender][_spender]
);
allowances[msg.sender][_spender] += _addedValue;
Approval(msg.sender, _spender, allowances[msg.sender][_spender]);
return true;
}
decreaseApproval keyboard_arrow_up
Source Code
function decreaseApproval(address _spender, uint256 _subtractedValue)
public
returns (bool)
{
uint256 oldValue = allowances[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowances[msg.sender][_spender] = 0;
} else {
allowances[msg.sender][_spender] = oldValue - _subtractedValue;
}
Approval(msg.sender, _spender, allowances[msg.sender][_spender]);
return true;
}
Internal Functions
Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.
internal CNNTokenBase._transfer keyboard_arrow_up
Requirements help
Source Code
function _transfer(
address _from,
address _to,
uint256 _value
) internal returns (bool) {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balances[_from] >= _value);
// Check for overflows
require(balances[_to] + _value > balances[_to]);
// Save this for an assertion in the future
uint256 previousBalances = balances[_from] + balances[_to];
// Subtract from the sender
balances[_from] -= _value;
// Add the same to the recipient
balances[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balances[_from] + balances[_to] == previousBalances);
return true;
}
