VeChain Token

0xd850942ef8811f2a866692a623011bde52a462c1 Copy

ERC20

This contract is an ERC20 token.

Name VeChain Token

Symbol VEN

Decimals 18

Total Supply 1,000,000,000 VEN

About

Stats

Public Functions 14

Event Types 2

Code Size 20,778 bytes

Library Use

Uses SafeMath for uint256.

Events (2)

Approval Event

Parameters

_owner	address
_spender	address
_value	uint256

Transfer Event

Parameters

_from	address
_to	address
_value	uint256

Structs (2)

Supplies Struct

Members

total	uint128
rawTokens	uint128

Account Struct

Members

balance	uint112
rawTokens	uint112
lastMintedTimestamp	uint32

Constants (3)

name Constant

string

VeChain Token

decimals Constant

uint8

symbol Constant

string

VEN

State Variables (5)

owner Variable

address

supplies Variable

Supplies

Internal Variable

accounts Variable

mapping(address => Account)

Internal Variable

allowed Variable

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

Internal Variable

bonusOffered Variable

uint256

Internal Variable

Functions Expand All Collapse All

setOwner

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

Source Code

function setOwner(address _newOwner) onlyOwner {
  owner = _newOwner;
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function totalSupply() constant returns (uint256 supply) {
  return supplies.total;
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability constant

Source Code

function balanceOf(address _owner) constant returns (uint256 balance) {
  if (accounts[_owner].rawTokens == 0) return accounts[_owner].balance;

  if (bonusOffered > 0) {
    uint256 bonus = bonusOffered.mul(accounts[_owner].rawTokens).div(
      supplies.rawTokens
    );

    return bonus.add(accounts[_owner].balance).add(accounts[_owner].rawTokens);
  }

  return uint256(accounts[_owner].balance).add(accounts[_owner].rawTokens);
}

transfer

Parameters

Name	Type
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

null

Source Code

function transfer(address _to, uint256 _amount) returns (bool success) {
  require(isSealed());

  // implicitly claim bonus for both sender and receiver
  claimBonus(msg.sender);
  claimBonus(_to);

  // according to VEN's total supply, never overflow here
  if (accounts[msg.sender].balance >= _amount && _amount > 0) {
    accounts[msg.sender].balance -= uint112(_amount);
    accounts[_to].balance = _amount.add(accounts[_to].balance).toUINT112();
    Transfer(msg.sender, _to, _amount);
    return true;
  } else {
    return false;
  }
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

null

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _amount
) returns (bool success) {
  require(isSealed());

  // implicitly claim bonus for both sender and receiver
  claimBonus(_from);
  claimBonus(_to);

  // according to VEN's total supply, never overflow here
  if (
    accounts[_from].balance >= _amount &&
    allowed[_from][msg.sender] >= _amount &&
    _amount > 0
  ) {
    accounts[_from].balance -= uint112(_amount);
    allowed[_from][msg.sender] -= _amount;
    accounts[_to].balance = _amount.add(accounts[_to].balance).toUINT112();
    Transfer(_from, _to, _amount);
    return true;
  } else {
    return false;
  }
}

approve

Parameters

Name	Type
_spender	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Source Code

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

allowance

Parameters

Name	Type
_owner	address
_spender	address

Properties

Visibility public

Mutability constant

Source Code

function allowance(address _owner, address _spender)
  constant
  returns (uint256 remaining)
{
  return allowed[_owner][_spender];
}

constructor

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

function() {
  revert();
}

isSealed

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function isSealed() constant returns (bool) {
  return owner == 0;
}

lastMintedTimestamp

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability constant

Source Code

function lastMintedTimestamp(address _owner) constant returns (uint32) {
  return accounts[_owner].lastMintedTimestamp;
}

approveAndCall

Parameters

Name	Type
_spender	address
_value	uint256
_extraData	bytes

Properties

Visibility public

Mutability transaction

Source Code

function approveAndCall(
  address _spender,
  uint256 _value,
  bytes _extraData
) returns (bool success) {
  allowed[msg.sender][_spender] = _value;
  Approval(msg.sender, _spender, _value);

  //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
  //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
  //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
  //if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { revert(); }
  ApprovalReceiver(_spender).receiveApproval(
    msg.sender,
    _value,
    this,
    _extraData
  );
  return true;
}

mint

Parameters

Name	Type
_owner	address
_amount	uint256
_isRaw	bool
timestamp	uint32

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function mint(
  address _owner,
  uint256 _amount,
  bool _isRaw,
  uint32 timestamp
) onlyOwner {
  if (_isRaw) {
    accounts[_owner].rawTokens = _amount
    .add(accounts[_owner].rawTokens)
    .toUINT112();
    supplies.rawTokens = _amount.add(supplies.rawTokens).toUINT128();
  } else {
    accounts[_owner].balance = _amount
    .add(accounts[_owner].balance)
    .toUINT112();
  }

  accounts[_owner].lastMintedTimestamp = timestamp;

  supplies.total = _amount.add(supplies.total).toUINT128();
  Transfer(0, _owner, _amount);
}

offerBonus

Parameters

Name	Type
_bonus	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function offerBonus(uint256 _bonus) onlyOwner {
  bonusOffered = bonusOffered.add(_bonus);
  supplies.total = _bonus.add(supplies.total).toUINT128();
  Transfer(0, this, _bonus);
}

seal

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 seal() onlyOwner {
  setOwner(0);
}

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 VEN.claimBonus

Parameters

Name	Type
_owner	address

Properties

Visibility internal

Mutability transaction

Requirements

null

Source Code

function claimBonus(address _owner) internal {
  require(isSealed());
  if (accounts[_owner].rawTokens != 0) {
    uint256 realBalance = balanceOf(_owner);
    uint256 bonus = realBalance.sub(accounts[_owner].balance).sub(
      accounts[_owner].rawTokens
    );

    accounts[_owner].balance = realBalance.toUINT112();
    accounts[_owner].rawTokens = 0;
    if (bonus > 0) {
      Transfer(this, _owner, bonus);
    }
  }
}

VeChain Token

ERC20

About

Stats

Library Use

Events (2) keyboard_arrow_up

Approval 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.

Structs (2) keyboard_arrow_up

Supplies Struct

Members

Account Struct

Members

Constants (3) keyboard_arrow_up

name Constant

decimals Constant

symbol Constant

State Variables (5) keyboard_arrow_up

owner Variable

supplies Variable

accounts Variable

allowed Variable

bonusOffered Variable

Functions Expand All Collapse All

setOwner 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

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

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

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

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

constructor 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

isSealed 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

lastMintedTimestamp 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

approveAndCall 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

mint 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

Events (2)

Parameters

Parameters

Structs (2)

Constants (3)

State Variables (5)

setOwner

Parameters

Modifiers

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

transferFrom

Parameters

Requirements

approve

Parameters

allowance

Parameters

constructor

Parameters

isSealed

Parameters

lastMintedTimestamp

Parameters

approveAndCall

Parameters

mint

Parameters

Modifiers

offerBonus

Parameters

Modifiers

seal

Parameters

Modifiers

internal VEN.claimBonus

Parameters

Requirements