Chroma

0x915044526758533dfb918eceb6e44bc21632060d Copy

ERC20

This contract is an ERC20 token.

Name Chroma

Symbol CHR

Decimals 6

Total Supply 475,191,731 CHR

About

Stats

Public Functions 16

Event Types 5

Code Size 14,343 bytes

Events (5)

Approval Event

Parameters

owner	address
spender	address
value	uint256

MinterSet Event

Parameters

account

address

Transfer Event

Parameters

from	address
to	address
value	uint256

TransferFromChromia Event

Parameters

to	address
refID	bytes32
value	uint256

TransferToChromia Event

Parameters

from	address
to	bytes32
value	uint256

Constants (1)

DECIMALS Constant

uint8

State Variables (8)

_minter Variable

address

Internal Variable

_cap Variable

uint256

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowed Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_decimals Variable

uint8

Internal Variable

Functions Expand All Collapse All

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;
}

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];
}

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];
}

transfer

Parameters

Name	Type
to	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function transfer(address to, uint256 value) public returns (bool) {
  _transfer(msg.sender, to, value);
  return true;
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

spender 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
from	address
to	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

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

Source Code

function transferFrom(
  address from,
  address to,
  uint256 value
) public returns (bool) {
  _transfer(from, to, value);
  _approve(from, msg.sender, _allowed[from][msg.sender].sub(value));
  return true;
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

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, _allowed[msg.sender][spender].add(addedValue));
  return true;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

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,
    _allowed[msg.sender][spender].sub(subtractedValue)
  );
  return true;
}

cap

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function cap() public view returns (uint256) {
  return _cap;
}

transferToChromia

Parameters

Name	Type
to	bytes32
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function transferToChromia(bytes32 to, uint256 value) public {
  _burn(msg.sender, value);
  emit TransferToChromia(msg.sender, to, value);
}

transferFromChromia

Parameters

Name	Type
to	address
value	uint256
refID	bytes32

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Requirements

UNKNOWN VALUE must be less than or equal to the result of calling cap

account must not be equal to UNKNOWN VALUE

Source Code

function transferFromChromia(
  address to,
  uint256 value,
  bytes32 refID
) public onlyMinter returns (bool) {
  _mint(to, value);
  emit TransferFromChromia(to, refID, value);
  return true;
}

isMinter

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function isMinter(address account) public view returns (bool) {
  return _minter == account;
}

changeMinter

Parameters

Name	Type
newMinter	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Source Code

function changeMinter(address newMinter) public onlyMinter {
  _setMinter(newMinter);
}

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 Chromia._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

UNKNOWN VALUE must be less than or equal to the result of calling cap

account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(totalSupply().add(value) <= cap(), "ERC20Capped: cap exceeded");
  super._mint(account, value);
}

internal Chromia._setMinter

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _setMinter(address account) internal {
  _minter = account;
  emit MinterSet(account);
}

internal ERC20._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

  _balances[from] = _balances[from].sub(value);
  _balances[to] = _balances[to].add(value);
  emit Transfer(from, to, value);
}

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

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

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));

  _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

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

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(spender != address(0));
  require(owner != address(0));

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

internal ERC20._burnFrom

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 _burnFrom(address account, uint256 value) internal {
  _burn(account, value);
  _approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}

Chroma

ERC20

About

Stats

Events (5) keyboard_arrow_up

Approval Event

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

MinterSet 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.

TransferFromChromia Event

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

TransferToChromia Event

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

Constants (1) keyboard_arrow_up

DECIMALS Constant

State Variables (8) keyboard_arrow_up

_minter Variable

_cap Variable

_balances Variable

_allowed Variable

_totalSupply Variable

_name Variable

_symbol Variable

_decimals Variable

Functions Expand All Collapse All

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

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

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

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

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

cap 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

Events (5)

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (1)

State Variables (8)

name

Parameters

symbol

Parameters

decimals

Parameters

totalSupply

Parameters

balanceOf

Parameters

allowance

Parameters

transfer

Parameters

Requirements

approve

Parameters

Requirements

transferFrom

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

cap

Parameters

transferToChromia

Parameters

Requirements

transferFromChromia

Parameters

Modifiers

Requirements

isMinter

Parameters

changeMinter

Parameters

Modifiers

internal Chromia._mint

Parameters

Requirements

internal Chromia._setMinter

Parameters

internal ERC20._transfer

Parameters

Requirements

internal ERC20._mint

Parameters

Requirements

internal ERC20._burn

Parameters

Requirements

internal ERC20._approve

Parameters

Requirements

internal ERC20._burnFrom

Parameters

Requirements