USDK

0x1c48f86ae57291f7686349f12601910bd8d470bb Copy

ERC20

This contract is an ERC20 token.

Name USDK

Symbol USDK

Decimals 18

Total Supply 32,478,711 USDK

About

USDK (USDK) is a cryptocurrency and operates on the Ethereum platform. USDK has a current supply of 28,600,072. The last known price of USDK is 1.00091268 USD and is down -0.08 over the last 24 hours. It is currently trading on 19 active market(s) with $98,318,944.61 traded over the last 24 hours. More information can be found at https://www.oklink.com/.

Stats

Public Functions 20

Event Types 12

Code Size 15,142 bytes

Library Use

Uses SafeMath for uint256.

Events (12)

AddressFrozen Event

Parameters

addr

address

AddressUnfrozen Event

Parameters

addr

address

Approval Event

Parameters

owner	address
spender	address
value	uint256

FrozenAddressWiped Event

Parameters

addr

address

LawEnforcementRoleSet Event

Parameters

oldLawEnforcementRole	address
newLawEnforcementRole	address

OwnershipTransferred Event

Parameters

oldOwner	address
newOwner	address

Pause Event

Parameters

SupplyControllerSet Event

Parameters

oldSupplyController	address
newSupplyController	address

SupplyDecreased Event

Parameters

from	address
value	uint256

SupplyIncreased Event

Parameters

to	address
value	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

Unpause Event

Parameters

Constants (3)

name Constant

string

USDK

symbol Constant

string

USDK

decimals Constant

uint8

State Variables (9)

owner Variable

address

paused Variable

bool

lawEnforcementRole Variable

address

supplyController Variable

address

initialized Variable

bool

Internal Variable

balances Variable

mapping(address => uint256)

Internal Variable

totalSupply_ Variable

uint256

Internal Variable

_allowed Variable

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

Internal Variable

frozen Variable

mapping(address => bool)

Internal Variable

Functions Expand All Collapse All

initialize

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Requirements

initialized must not be true

Source Code

function initialize() public {
  require(!initialized, "already initialized");
  owner = msg.sender;
  lawEnforcementRole = address(0);
  totalSupply_ = 0;
  supplyController = msg.sender;
  initialized = true;
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

paused must not be true

Requirements

_to must not be equal to UNKNOWN VALUE

frozen for the sender's address must not be true

frozen for _to must not be true

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

Source Code

function transfer(address _to, uint256 _value)
  public
  whenNotPaused
  returns (bool)
{
  require(_to != address(0), "cannot transfer to address zero");
  require(!frozen[_to] && !frozen[msg.sender], "address frozen");
  require(_value <= balances[msg.sender], "insufficient funds");

  balances[msg.sender] = balances[msg.sender].sub(_value);
  balances[_to] = balances[_to].add(_value);
  emit Transfer(msg.sender, _to, _value);
  return true;
}

balanceOf

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability view

Source Code

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

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

paused must not be true

Requirements

_to must not be equal to UNKNOWN VALUE

frozen for the sender's address must not be true

frozen for _from must not be true

frozen for _to must not be true

_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 whenNotPaused returns (bool) {
  require(_to != address(0), "cannot transfer to address zero");
  require(
    !frozen[_to] && !frozen[_from] && !frozen[msg.sender],
    "address frozen"
  );
  require(_value <= balances[_from], "insufficient funds");
  require(_value <= _allowed[_from][msg.sender], "insufficient allowance");

  balances[_from] = balances[_from].sub(_value);
  balances[_to] = balances[_to].add(_value);
  _allowed[_from][msg.sender] = _allowed[_from][msg.sender].sub(_value);
  emit Transfer(_from, _to, _value);
  return true;
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

paused must not be true

Requirements

frozen for the sender's address must not be true

frozen for spender must not be true

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 value)
  public
  whenNotPaused
  returns (bool)
{
  _approve(msg.sender, spender, value);
  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 _allowed[_owner][spender];
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

paused must not be true

Requirements

frozen for the sender's address must not be true

frozen for spender must not be true

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)
  public
  whenNotPaused
  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

Modifiers

whenNotPaused checks for the following:

paused must not be true

Requirements

frozen for the sender's address must not be true

frozen for spender must not be true

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)
  public
  whenNotPaused
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowed[msg.sender][spender].sub(subtractedValue)
  );
  return true;
}

transferOwnership

Parameters

Name	Type
_newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

_newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address _newOwner) public onlyOwner {
  require(_newOwner != address(0), "cannot transfer ownership to address zero");
  emit OwnershipTransferred(owner, _newOwner);
  owner = _newOwner;
}

pause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

paused must not be true

Source Code

function pause() public onlyOwner {
  require(!paused, "already paused");
  paused = true;
  emit Pause();
}

unpause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

paused must be true

Source Code

function unpause() public onlyOwner {
  require(paused, "already unpaused");
  paused = false;
  emit Unpause();
}

setLawEnforcementRole

Parameters

Name	Type
_newLawEnforcementRole	address

Properties

Visibility public

Mutability transaction

Requirements

_newLawEnforcementRole must not be equal to UNKNOWN VALUE

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

Source Code

function setLawEnforcementRole(address _newLawEnforcementRole) public {
  require(
    _newLawEnforcementRole != address(0),
    "lawEnforcementRole cannot address(0)"
  );
  require(
    msg.sender == lawEnforcementRole || msg.sender == owner,
    "only lawEnforcementRole or Owner"
  );
  emit LawEnforcementRoleSet(lawEnforcementRole, _newLawEnforcementRole);
  lawEnforcementRole = _newLawEnforcementRole;
}

freeze

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyLawEnforcementRole checks for the following:

lawEnforcementRole must be equal to the sender's address

Requirements

frozen for _addr must not be true

Source Code

function freeze(address _addr) public onlyLawEnforcementRole {
  require(!frozen[_addr], "address already frozen");
  frozen[_addr] = true;
  emit AddressFrozen(_addr);
}

unfreeze

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyLawEnforcementRole checks for the following:

lawEnforcementRole must be equal to the sender's address

Source Code

function unfreeze(address _addr) public onlyLawEnforcementRole {
  require(frozen[_addr], "address already unfrozen");
  frozen[_addr] = false;
  emit AddressUnfrozen(_addr);
}

wipeFrozenAddress

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyLawEnforcementRole checks for the following:

lawEnforcementRole must be equal to the sender's address

Source Code

function wipeFrozenAddress(address _addr) public onlyLawEnforcementRole {
  require(frozen[_addr], "address is not frozen");
  uint256 _balance = balances[_addr];
  balances[_addr] = 0;
  totalSupply_ = totalSupply_.sub(_balance);
  emit FrozenAddressWiped(_addr);
  emit SupplyDecreased(_addr, _balance);
  emit Transfer(_addr, address(0), _balance);
}

isFrozen

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability view

Source Code

function isFrozen(address _addr) public view returns (bool) {
  return frozen[_addr];
}

setSupplyController

Parameters

Name	Type
_newSupplyController	address

Properties

Visibility public

Mutability transaction

Requirements

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

_newSupplyController must not be equal to UNKNOWN VALUE

Source Code

function setSupplyController(address _newSupplyController) public {
  require(
    msg.sender == supplyController || msg.sender == owner,
    "only SupplyController or Owner"
  );
  require(
    _newSupplyController != address(0),
    "cannot set supply controller to address zero"
  );
  emit SupplyControllerSet(supplyController, _newSupplyController);
  supplyController = _newSupplyController;
}

increaseSupply

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlySupplyController checks for the following:

supplyController must be equal to the sender's address

Source Code

function increaseSupply(uint256 _value)
  public
  onlySupplyController
  returns (bool success)
{
  totalSupply_ = totalSupply_.add(_value);
  balances[supplyController] = balances[supplyController].add(_value);
  emit SupplyIncreased(supplyController, _value);
  emit Transfer(address(0), supplyController, _value);
  return true;
}

decreaseSupply

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlySupplyController checks for the following:

supplyController must be equal to the sender's address

Requirements

_value must be less than or equal to balances for supplyController

Source Code

function decreaseSupply(uint256 _value)
  public
  onlySupplyController
  returns (bool success)
{
  require(_value <= balances[supplyController], "not enough supply");
  balances[supplyController] = balances[supplyController].sub(_value);
  totalSupply_ = totalSupply_.sub(_value);
  emit SupplyDecreased(supplyController, _value);
  emit Transfer(supplyController, address(0), _value);
  return true;
}

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 USDKImplementation._approve

Parameters

Name	Type
_owner	address
spender	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

frozen for the sender's address must not be true

frozen for spender must not be true

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

spender must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address _owner,
  address spender,
  uint256 value
) internal {
  require(!frozen[spender] && !frozen[_owner], "address frozen");
  require(spender != address(0) && _owner != address(0), "not address(0)");
  _allowed[_owner][spender] = value;
  emit Approval(_owner, spender, value);
}

USDK

ERC20

About link

Stats

Library Use

Events (12) keyboard_arrow_up

AddressFrozen Event

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

AddressUnfrozen Event

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

Approval Event

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

FrozenAddressWiped Event

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

LawEnforcementRoleSet 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.

Pause Event

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

SupplyControllerSet Event

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

SupplyDecreased Event

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

SupplyIncreased 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.

Unpause Event

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

Constants (3) keyboard_arrow_up

name Constant

symbol Constant

decimals Constant

State Variables (9) keyboard_arrow_up

owner Variable

paused Variable

lawEnforcementRole Variable

supplyController Variable

initialized Variable

balances Variable

totalSupply_ Variable

_allowed Variable

frozen Variable

Functions Expand All Collapse All

initialize 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

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

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

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

whenNotPaused 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

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

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

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

whenNotPaused 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

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

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

whenNotPaused 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

allowance keyboard_arrow_up

About

Events (12)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (3)

State Variables (9)

initialize

Parameters

Requirements

totalSupply

Parameters

transfer

Parameters

Modifiers

Requirements

balanceOf

Parameters

transferFrom

Parameters

Modifiers

Requirements

approve

Parameters

Modifiers

Requirements

allowance

Parameters

increaseAllowance

Parameters

Modifiers

Requirements

decreaseAllowance

Parameters

Modifiers

Requirements

transferOwnership

Parameters

Modifiers

Requirements

pause

Parameters

Modifiers

Requirements

unpause

Parameters

Modifiers

Requirements

setLawEnforcementRole

Parameters

Requirements

freeze

Parameters

Modifiers

Requirements

unfreeze

Parameters

Modifiers

wipeFrozenAddress

Parameters

Modifiers

isFrozen

Parameters

setSupplyController

Parameters