Mass Vehicle Ledger Token

0xa849eaae994fb86afa73382e9bd88c2b6b18dc71 Copy

ERC20

This contract is an ERC20 token.

Name Mass Vehicle Ledger Token

Symbol MVL

Decimals 18

Total Supply 30,000,000,000 MVL

About

MVL (MVL) is a cryptocurrency and operates on the Ethereum platform. MVL has a current supply of 30,000,000,000 with 12,979,354,798.755093 in circulation. The last known price of MVL is 0.01095104 USD and is down -3.86 over the last 24 hours. It is currently trading on 9 active market(s) with $12,681,142.41 traded over the last 24 hours. More information can be found at http://mvlchain.io.

Stats

Public Functions 17

Event Types 5

Code Size 10,716 bytes

Library Use

Uses SafeMath for uint256.

Events (5)

AddTokenLock Event

Parameters

to	address
time	uint256
amount	uint256

Approval Event

Parameters

owner	address
spender	address
value	uint256

Burn Event

Parameters

burner	address
amount	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
value	uint256

Constants (4)

symbol Constant

string

MVL

name Constant

string

Mass Vehicle Ledger Token

decimals Constant

uint8

TOTAL_SUPPLY Constant

uint256

3 * UNKNOWN VALUE * UNKNOWN VALUE

State Variables (11)

owner Variable

address

admin Variable

address

name Variable

string

symbol Variable

string

decimals Variable

uint8

transferEnabled Variable

bool

noTokenLocked Variable

bool

balances Variable

mapping(address => uint256)

Internal Variable

_totalSupply Variable

uint256

Internal Variable

allowed Variable

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

Internal Variable

lockingStates Variable

mapping(address => TokenLockState)

Internal Variable

Functions Expand All Collapse All

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

newOwner must not be equal to owner

newOwner must not be equal to admin

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  require(newOwner != address(0));
  require(newOwner != owner);
  require(newOwner != admin);

  emit OwnershipTransferred(owner, newOwner);
  owner = newOwner;
}

setAdmin

Parameters

Name	Type
newAdmin	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

admin must not be equal to newAdmin

owner must not be equal to newAdmin

One or more of the following: - allowed for the sender's address for oldAdmin must be equal to 0 - OR 0 must be equal to 0

Source Code

function setAdmin(address newAdmin) public onlyOwner {
  address oldAdmin = admin;
  super.setAdmin(newAdmin);
  approve(oldAdmin, 0);
  approve(newAdmin, TOTAL_SUPPLY);
}

unlockAllTokens

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

Source Code

function unlockAllTokens() public onlyOwner {
  noTokenLocked = true;
}

enableTransfer

Parameters

Name	Type
_enable	bool

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function enableTransfer(bool _enable) public onlyOwner {
  transferEnabled = _enable;
}

getMinLockedAmount

Parameters

Name	Type
_addr	address

Properties

Visibility public

Mutability view

Source Code

function getMinLockedAmount(address _addr)
  public
  view
  returns (uint256 locked)
{
  uint256 i;
  uint256 a;
  uint256 t;
  uint256 lockSum = 0;

  // if the address has no limitations just return 0
  TokenLockState storage lockState = lockingStates[_addr];
  if (lockState.latestReleaseTime < now) {
    return 0;
  }

  for (i = 0; i < lockState.tokenLocks.length; i++) {
    a = lockState.tokenLocks[i].amount;
    t = lockState.tokenLocks[i].time;

    if (t > now) {
      lockSum = lockSum.add(a);
    }
  }

  return lockSum;
}

addTokenLock

Parameters

Name	Type
_addr	address
_value	uint256
_release_time	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwnerOrAdmin checks for the following:

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

Requirements

_addr must not be equal to UNKNOWN VALUE

_value must be greater than 0

_release_time must be greater than now

Source Code

function addTokenLock(
  address _addr,
  uint256 _value,
  uint256 _release_time
) public onlyOwnerOrAdmin {
  require(_addr != address(0));
  require(_value > 0);
  require(_release_time > now);

  TokenLockState storage lockState = lockingStates[_addr]; // assigns a pointer. change the member value will update struct itself.
  if (_release_time > lockState.latestReleaseTime) {
    lockState.latestReleaseTime = _release_time;
  }
  lockState.tokenLocks.push(TokenLockInfo(_value, _release_time));

  emit AddTokenLock(_addr, _release_time, _value);
}

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 balance) {
  return balances[_owner];
}

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyValidDestination checks for the following:

_to must not be equal to UNKNOWN VALUE

_to must not be equal to owner

canTransfer checks for the following:

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

One or more of the following:

Requirements

_to must not be equal to UNKNOWN VALUE

_value must be greater than 0

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

Source Code

function transfer(address _to, uint256 _value)
  public
  onlyValidDestination(_to)
  canTransfer(msg.sender, _value)
  returns (bool success)
{
  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 remaining)
{
  return allowed[_owner][_spender];
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyValidDestination checks for the following:

_to must not be equal to UNKNOWN VALUE

_to must not be equal to owner

canTransfer checks for the following:

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

One or more of the following:

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
)
  public
  onlyValidDestination(_to)
  canTransfer(_from, _value)
  returns (bool success)
{
  // SafeMath.sub will throw if there is not enough balance.
  balances[_from] = balances[_from].sub(_value);
  balances[_to] = balances[_to].add(_value);
  allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); // this will throw if we don't have enough allowance

  // this event comes from BasicToken.sol
  emit Transfer(_from, _to, _value);

  return true;
}

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: - allowed for the sender's address for oldAdmin must be equal to 0 - OR 0 must be equal to 0

Source Code

function approve(address _spender, uint256 _value) public returns (bool) {
  require(_value == 0 || allowed[msg.sender][_spender] == 0);

  allowed[msg.sender][_spender] = _value;
  emit Approval(msg.sender, _spender, _value);

  return true;
}

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint256

Properties

Visibility public

Mutability transaction

Source Code

function increaseApproval(address _spender, uint256 _addedValue)
  public
  returns (bool success)
{
  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	uint256

Properties

Visibility public

Mutability transaction

Source Code

function decreaseApproval(address _spender, uint256 _subtractedValue)
  public
  returns (bool success)
{
  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;
}

burn

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function burn(uint256 _value) public onlyOwner {
  balances[msg.sender] = balances[msg.sender].sub(_value);
  _totalSupply = _totalSupply.sub(_value);
  emit Burn(msg.sender, _value);
  emit Transfer(msg.sender, address(0), _value);
}

canTransferIfLocked

Parameters

Name	Type
_sender	address
_value	uint256

Properties

Visibility public

Mutability view

Source Code

function canTransferIfLocked(address _sender, uint256 _value)
  public
  view
  returns (bool)
{
  uint256 after_math = balances[_sender].sub(_value);
  return after_math >= getMinLockedAmount(_sender);
}

constructor

Parameters

This function has no parameters.

Properties

Visibility public

Mutability payable

Source Code

function() public payable {
  // don't send eth directly to token contract
  revert();
}

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.

Mass Vehicle Ledger Token

ERC20

About link description

Stats

Library Use

Events (5) keyboard_arrow_up

AddTokenLock 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.

Burn 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

symbol Constant

name Constant

decimals Constant

TOTAL_SUPPLY Constant

State Variables (11) keyboard_arrow_up

owner Variable

admin Variable

name Variable

symbol Variable

decimals Variable

transferEnabled Variable

noTokenLocked Variable

balances Variable

_totalSupply Variable

allowed Variable

lockingStates Variable

Functions Expand All Collapse All

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

setAdmin 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

unlockAllTokens 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:

Source Code

enableTransfer 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:

Source Code

getMinLockedAmount 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

addTokenLock 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.

onlyOwnerOrAdmin 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

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

About

Events (5)

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (4)

State Variables (11)

transferOwnership

Parameters

Modifiers

Requirements

setAdmin

Parameters

Modifiers

Requirements

unlockAllTokens

Parameters

Modifiers

enableTransfer

Parameters

Modifiers

getMinLockedAmount

Parameters

addTokenLock

Parameters

Modifiers

Requirements

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Modifiers

Requirements

allowance

Parameters

transferFrom

Parameters

Modifiers

approve

Parameters

Requirements

increaseApproval

Parameters

decreaseApproval

Parameters

burn

Parameters

Modifiers

canTransferIfLocked

Parameters

constructor

Parameters