[FCT] FirmaChain Token

0xe1bad922f84b198a08292fb600319300ae32471b Copy

ERC20

This contract is an ERC20 token.

Name [FCT] FirmaChain Token

Symbol FCT

Decimals 18

Total Supply 600,000,000 FCT

About

FirmaChain (FCT) is a cryptocurrency launched in 2019and operates on the Ethereum platform. FirmaChain has a current supply of 600,000,000 with 184,275,043.149559 in circulation. The last known price of FirmaChain is 0.0902231 USD and is down -7.18 over the last 24 hours. It is currently trading on 6 active market(s) with $7,193,235.72 traded over the last 24 hours. More information can be found at https://firmachain.org/#/.

Stats

Public Functions 16

Event Types 7

Code Size 11,051 bytes

Library Use

Uses SafeMath for uint256.

Events (7)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Burn Event

Parameters

_from	address
_amount	uint256

Mint Event

Parameters

_to	address
_amount	uint256

OwnershipExtended Event

Parameters

host	address
guest	address

OwnershipRemoved Event

Parameters

removedOwner

address

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
value	uint256

Constants (4)

TOTAL_CAP Constant

uint256

600000000

name Constant

string

[FCT] FirmaChain Token

symbol Constant

string

FCT

decimals Constant

uint256

State Variables (6)

isTransferable Variable

bool

Internal Variable

allowed Variable

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

Internal Variable

balances Variable

mapping(address => uint256)

Internal Variable

totalSupply_ Variable

uint256

Internal Variable

owners Variable

mapping(address => bool)

Internal Variable

unremovableOwner Variable

address

Internal Variable

Functions Expand All Collapse All

addOwner

Parameters

Name	Type
guest	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Requirements

guest must not be equal to UNKNOWN VALUE

Source Code

function addOwner(address guest) public onlyOwner {
  require(guest != address(0));
  owners[guest] = true;
  emit OwnershipExtended(msg.sender, guest);
}

removeOwner

Parameters

Name	Type
removedOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Requirements

removedOwner must not be equal to UNKNOWN VALUE

unremovableOwner must not be equal to removedOwner

Source Code

function removeOwner(address removedOwner) public onlyOwner {
  require(removedOwner != address(0));
  require(unremovableOwner != removedOwner);
  delete owners[removedOwner];
  emit OwnershipRemoved(removedOwner);
}

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Requirements

newOwner must not be equal to UNKNOWN VALUE

unremovableOwner must not be equal to the sender's address

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  require(newOwner != address(0));
  require(unremovableOwner != msg.sender);
  owners[newOwner] = true;
  delete owners[msg.sender];
  emit OwnershipTransferred(msg.sender, newOwner);
}

isOwner

Parameters

Name	Type
addr	address

Properties

Visibility public

Mutability view

Source Code

function isOwner(address addr) public view returns (bool) {
  return owners[addr];
}

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
_owner	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address _owner) public view returns (uint256) {
  return balances[_owner];
}

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: -isTransferable must be true

_to must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for the sender's address

Source Code

function transfer(address _to, uint256 _value) public returns (bool) {
  require(isTransferable || owners[msg.sender]);
  return super.transfer(_to, _value);
}

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 allowed[_owner][_spender];
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: -isTransferable must be true

_to must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for _from

_value must be less than or equal to allowed for _from for the sender's address

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public returns (bool) {
  require(isTransferable || owners[msg.sender]);
  return super.transferFrom(_from, _to, _value);
}

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Source Code

function approve(address _spender, uint256 _value) public returns (bool) {
  allowed[msg.sender][_spender] = _value;
  emit Approval(msg.sender, _spender, _value);
  return true;
}

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function increaseApproval(address _spender, uint256 _addedValue)
  public
  returns (bool)
{
  allowed[msg.sender][_spender] = (
    allowed[msg.sender][_spender].add(_addedValue)
  );
  emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function decreaseApproval(address _spender, uint256 _subtractedValue)
  public
  returns (bool)
{
  uint256 oldValue = allowed[msg.sender][_spender];
  if (_subtractedValue > oldValue) {
    allowed[msg.sender][_spender] = 0;
  } else {
    allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
  }
  emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

unlock

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Source Code

function unlock() external onlyOwner {
  isTransferable = true;
}

lock

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Source Code

function lock() external onlyOwner {
  isTransferable = false;
}

mint

Parameters

Name	Type
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function mint(address _to, uint256 _amount) public onlyOwner returns (bool) {
  require(_to != address(0));

  totalSupply_ = totalSupply_.add(_amount);
  balances[_to] = balances[_to].add(_amount);

  emit Mint(_to, _amount);
  emit Transfer(address(0), _to, _amount);

  return true;
}

burn

Parameters

Name	Type
_amount	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

Requirements

_amount must be less than or equal to balances for the sender's address

Source Code

function burn(uint256 _amount) public onlyOwner {
  require(_amount <= balances[msg.sender]);

  totalSupply_ = totalSupply_.sub(_amount);
  balances[msg.sender] = balances[msg.sender].sub(_amount);

  emit Burn(msg.sender, _amount);
  emit Transfer(msg.sender, address(0), _amount);
}

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.

[FCT] FirmaChain Token

ERC20

About link description

Stats

Library Use

Events (7) keyboard_arrow_up

Approval Event

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

Burn Event

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

Mint Event

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

OwnershipExtended Event

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

OwnershipRemoved Event

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

OwnershipTransferred 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 (4) keyboard_arrow_up

TOTAL_CAP Constant

name Constant

symbol Constant

decimals Constant

State Variables (6) keyboard_arrow_up

isTransferable Variable

allowed Variable

balances Variable

totalSupply_ Variable

owners Variable

unremovableOwner Variable

Functions Expand All Collapse All

addOwner 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

removeOwner 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

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

isOwner 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

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

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

About

Events (7)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (4)

State Variables (6)

addOwner

Parameters

Modifiers

Requirements

removeOwner

Parameters

Modifiers

Requirements

transferOwnership

Parameters

Modifiers

Requirements

isOwner

Parameters

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

allowance

Parameters

transferFrom

Parameters

Requirements

approve

Parameters

increaseApproval

Parameters

decreaseApproval

Parameters

unlock

Parameters

Modifiers

lock

Parameters

Modifiers

mint

Parameters

Modifiers

Requirements

burn

Parameters

Modifiers

Requirements