STAKE

0x0ae055097c6d159879521c384f1d2123d1f195e6 Copy

ERC20

This contract is an ERC20 token.

Name STAKE

Symbol STAKE

Decimals 18

Total Supply 8,642,506 STAKE

About

xDai (STAKE) is a cryptocurrency and operates on the Ethereum platform. xDai has a current supply of 8,382,505.79789401 with 5,931,767.74222667 in circulation. The last known price of xDai is 6.83034808 USD and is down -2.44 over the last 24 hours. It is currently trading on 23 active market(s) with $881,553.20 traded over the last 24 hours. More information can be found at http://xdaichain.com/.

Stats

Public Functions 27

Event Types 8

Code Size 43,915 bytes

Events (8)

Approval Event

Parameters

owner	address
spender	address
value	uint256

BridgeAdded Event

Parameters

bridge

address

BridgeRemoved Event

Parameters

bridge

address

ContractFallbackCallFailed Event

Parameters

from	address
to	address
value	uint256

Mint Event

Parameters

to	address
amount	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
value	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256
data	bytes

Constants (4)

F_ADDR Constant

address

0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF

MAX_BRIDGES Constant

uint256

version Constant

string

PERMIT_TYPEHASH Constant

bytes32

0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb

State Variables (15)

bridgeCount Variable

uint256

distributionAddress Variable

address

privateOfferingDistributionAddress Variable

address

advisorsRewardDistributionAddress Variable

address

DOMAIN_SEPARATOR Variable

bytes32

bridgePointers Variable

mapping(address => address)

nonces Variable

mapping(address => uint256)

_owner Variable

address

Internal Variable

expirations Variable

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

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowances 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
account	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address account) public view returns (uint256) {
  return _balances[account];
}

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

success must be true

Source Code

function transfer(address _to, uint256 _value) public returns (bool) {
  _superTransfer(_to, _value);
  _callAfterTransfer(msg.sender, _to, _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 _allowances[owner][spender];
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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 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

success must be true

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public returns (bool) {
  _superTransferFrom(_from, _to, _value);
  _callAfterTransfer(_from, _to, _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

spender must not be equal to UNKNOWN VALUE

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  public
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowances[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

spender must not be equal to UNKNOWN VALUE

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowances[msg.sender][spender].sub(subtractedValue)
  );
  return true;
}

push

Parameters

Name	Type
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

_to must not be equal to UNKNOWN VALUE

Source Code

function push(address _to, uint256 _amount) public {
  transferFrom(msg.sender, _to, _amount);
}

pull

Parameters

Name	Type
_from	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

_to must not be equal to UNKNOWN VALUE

Source Code

function pull(address _from, uint256 _amount) public {
  transferFrom(_from, msg.sender, _amount);
}

move

Parameters

Name	Type
_from	address
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

_to must not be equal to UNKNOWN VALUE

Source Code

function move(
  address _from,
  address _to,
  uint256 _amount
) public {
  transferFrom(_from, _to, _amount);
}

permit

Parameters

Name	Type
_holder	address
_spender	address
_nonce	uint256
_expiry	uint256
_allowed	bool
_v	uint8
_r	bytes32
_s	bytes32

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: - _expiry must be greater than or equal to the result of calling _now - OR _expiry must be equal to 0

_holder must be equal to the result of calling ecrecover with digest, _v, _r, _s

_nonce must be equal to UNKNOWN VALUE

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

_spender must not be equal to UNKNOWN VALUE

Source Code

function permit(
  address _holder,
  address _spender,
  uint256 _nonce,
  uint256 _expiry,
  bool _allowed,
  uint8 _v,
  bytes32 _r,
  bytes32 _s
) external {
  require(_expiry == 0 || _now() <= _expiry, "invalid expiry");

  bytes32 digest = keccak256(
    abi.encodePacked(
      "\x19\x01",
      DOMAIN_SEPARATOR,
      keccak256(
        abi.encode(
          PERMIT_TYPEHASH,
          _holder,
          _spender,
          _nonce,
          _expiry,
          _allowed
        )
      )
    )
  );

  require(
    _holder == ecrecover(digest, _v, _r, _s),
    "invalid signature or parameters"
  );
  require(_nonce == nonces[_holder]++, "invalid nonce");

  uint256 amount = _allowed ? uint256(-1) : 0;
  _approve(_holder, _spender, amount);

  expirations[_holder][_spender] = _allowed ? _expiry : 0;
}

owner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function owner() public view returns (address) {
  return _owner;
}

isOwner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function isOwner() public view returns (bool) {
  return msg.sender == _owner;
}

renounceOwnership

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Source Code

function renounceOwnership() public onlyOwner {
  revert("not implemented");
}

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  _transferOwnership(newOwner);
}

isBridge

Parameters

Name	Type
_address	address

Properties

Visibility public

Mutability view

Source Code

function isBridge(address _address) public view returns (bool) {
  return _address != F_ADDR && bridgePointers[_address] != address(0);
}

transferAndCall

Parameters

Name	Type
_to	address
_value	uint256
_data	bytes

Properties

Visibility public

Mutability transaction

Modifiers

validRecipient checks for the following:

_to must not be equal to UNKNOWN VALUE

Requirements

success must be true

Source Code

function transferAndCall(
  address _to,
  uint256 _value,
  bytes calldata _data
) external validRecipient(_to) returns (bool) {
  _superTransfer(_to, _value);
  emit Transfer(msg.sender, _to, _value, _data);

  if (_to.isContract()) {
    require(
      _contractFallback(msg.sender, _to, _value, _data),
      "contract call failed"
    );
  }
  return true;
}

transferDistribution

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: - advisorsRewardDistributionAddress must be equal to the sender's address - OR privateOfferingDistributionAddress must be equal to the sender's address - OR distributionAddress must be equal to the sender's address

success must be true

Source Code

function transferDistribution(address _to, uint256 _value)
  public
  returns (bool)
{
  require(
    msg.sender == distributionAddress ||
      msg.sender == privateOfferingDistributionAddress ||
      msg.sender == advisorsRewardDistributionAddress,
    "wrong sender"
  );
  _superTransfer(_to, _value);
  return true;
}

claimTokens

Parameters

Name	Type
_token	address
_to	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

validRecipient checks for the following:

_to must not be equal to UNKNOWN VALUE

Source Code

function claimTokens(address _token, address payable _to)
  public
  onlyOwner
  validRecipient(_to)
{
  if (_token == address(0)) {
    uint256 value = address(this).balance;
    if (!_to.send(value)) {
      // solium-disable-line security/no-send
      // We use the `Sacrifice` trick to be sure the coins can be 100% sent to the receiver.
      // Otherwise, if the receiver is a contract which has a revert in its fallback function,
      // the sending will fail.
      (new Sacrifice).value(value)(_to);
    }
  } else {
    ERC20 token = ERC20(_token);
    uint256 balance = token.balanceOf(address(this));
    token.safeTransfer(_to, balance);
  }
}

mint

Parameters

Name	Type
_account	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyBridge checks for the following:

null

Requirements

_account must not be equal to UNKNOWN VALUE

Source Code

function mint(address _account, uint256 _amount)
  external
  onlyBridge
  returns (bool)
{
  _mint(_account, _amount);
  emit Mint(_account, _amount);
  return true;
}

addBridge

Parameters

Name	Type
_bridge	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Requirements

bridgeCount must be less than MAX_BRIDGES

the result of calling isBridge with _bridge must not be true

firstBridge must not be equal to UNKNOWN VALUE

Source Code

function addBridge(address _bridge) external onlyOwner {
  require(
    bridgeCount < MAX_BRIDGES,
    "can't add one more bridge due to a limit"
  );
  require(_bridge.isContract(), "not a contract address");
  require(!isBridge(_bridge), "bridge already exists");

  address firstBridge = bridgePointers[F_ADDR];
  require(firstBridge != address(0), "first bridge is zero address");
  bridgePointers[F_ADDR] = _bridge;
  bridgePointers[_bridge] = firstBridge;
  bridgeCount = bridgeCount.add(1);

  emit BridgeAdded(_bridge);
}

removeBridge

Parameters

Name	Type
_bridge	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Requirements

null

next must not be equal to UNKNOWN VALUE

Source Code

function removeBridge(address _bridge) external onlyOwner {
  require(isBridge(_bridge), "bridge isn't existed");

  address nextBridge = bridgePointers[_bridge];
  address index = F_ADDR;
  address next = bridgePointers[index];
  require(next != address(0), "zero address found");

  while (next != _bridge) {
    index = next;
    next = bridgePointers[index];

    require(next != F_ADDR && next != address(0), "invalid address found");
  }

  bridgePointers[index] = nextBridge;
  delete bridgePointers[_bridge];
  bridgeCount = bridgeCount.sub(1);

  emit BridgeRemoved(_bridge);
}

bridgeList

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Requirements

nextBridge must not be equal to UNKNOWN VALUE

Source Code

function bridgeList() external view returns (address[] memory) {
  address[] memory list = new address[](bridgeCount);
  uint256 counter = 0;
  address nextBridge = bridgePointers[F_ADDR];
  require(nextBridge != address(0), "zero address found");

  while (nextBridge != F_ADDR) {
    list[counter] = nextBridge;
    nextBridge = bridgePointers[nextBridge];
    counter++;

    require(nextBridge != address(0), "zero address found");
  }

  return list;
}

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 ERC677BridgeToken._superTransfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

success must be true

Source Code

function _superTransfer(address _to, uint256 _value) internal {
  bool success;
  if (
    msg.sender == distributionAddress ||
    msg.sender == privateOfferingDistributionAddress ||
    msg.sender == advisorsRewardDistributionAddress
  ) {
    // Allow sending tokens to `address(0)` by
    // Distribution, PrivateOffering, or AdvisorsReward contract
    _balances[msg.sender] = _balances[msg.sender].sub(_value);
    _balances[_to] = _balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    success = true;
  } else {
    success = super.transfer(_to, _value);
  }
  require(success, "transfer failed");
}

internal ERC677BridgeToken._superTransferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

success must be true

Source Code

function _superTransferFrom(
  address _from,
  address _to,
  uint256 _value
) internal {
  bool success = super.transferFrom(_from, _to, _value);
  require(success, "transfer failed");
}

internal ERC677BridgeToken._callAfterTransfer

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility internal

Mutability transaction

Source Code

function _callAfterTransfer(
  address _from,
  address _to,
  uint256 _value
) internal {
  if (
    _to.isContract() && !_contractFallback(_from, _to, _value, new bytes(0))
  ) {
    require(!isBridge(_to), "you can't transfer to bridge contract");
    require(
      _to != distributionAddress,
      "you can't transfer to Distribution contract"
    );
    require(
      _to != privateOfferingDistributionAddress,
      "you can't transfer to PrivateOffering contract"
    );
    require(
      _to != advisorsRewardDistributionAddress,
      "you can't transfer to AdvisorsReward contract"
    );
    emit ContractFallbackCallFailed(_from, _to, _value);
  }
}

internal ERC677BridgeToken._contractFallback

Parameters

Name	Type
_from	address
_to	address
_value	uint256
_data	bytes

Properties

Visibility private

Mutability transaction

Source Code

function _contractFallback(
  address _from,
  address _to,
  uint256 _value,
  bytes memory _data
) private returns (bool) {
  string memory signature = "onTokenTransfer(address,uint256,bytes)";
  // solium-disable-next-line security/no-low-level-calls
  (bool success, ) = _to.call(
    abi.encodeWithSignature(signature, _from, _value, _data)
  );
  return success;
}

internal Ownable.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _owner = msg.sender;
  emit OwnershipTransferred(address(0), _owner);
}

internal Ownable._transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility internal

Mutability transaction

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function _transferOwnership(address newOwner) internal {
  require(newOwner != address(0), "Ownable: new owner is the zero address");
  emit OwnershipTransferred(_owner, newOwner);
  _owner = newOwner;
}

internal ERC20Permittable._now

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _now() internal view returns (uint256) {
  return now;
}

internal ERC20._transfer

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

_to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address sender,
  address recipient,
  uint256 amount
) internal {
  require(sender != address(0), "ERC20: transfer from the zero address");
  require(recipient != address(0), "ERC20: transfer to the zero address");

  _balances[sender] = _balances[sender].sub(amount);
  _balances[recipient] = _balances[recipient].add(amount);
  emit Transfer(sender, recipient, amount);
}

internal ERC20._mint

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 amount) internal {
  require(account != address(0), "ERC20: mint to the zero address");

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

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0), "ERC20: burn from the zero address");

  _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

_spender must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(owner != address(0), "ERC20: approve from the zero address");
  require(spender != address(0), "ERC20: approve to the zero address");

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

internal ERC20._burnFrom

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

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

_spender must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 amount) internal {
  _burn(account, amount);
  _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
}

STAKE

ERC20

About link description

Stats

Events (8) keyboard_arrow_up

Approval Event

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

BridgeAdded Event

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

BridgeRemoved Event

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

ContractFallbackCallFailed 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.

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.

Transfer Event

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

Constants (4) keyboard_arrow_up

F_ADDR Constant

MAX_BRIDGES Constant

version Constant

PERMIT_TYPEHASH Constant

State Variables (15) keyboard_arrow_up

bridgeCount Variable

distributionAddress Variable

privateOfferingDistributionAddress Variable

advisorsRewardDistributionAddress Variable

DOMAIN_SEPARATOR Variable

bridgePointers Variable

nonces Variable

_owner Variable

expirations Variable

_balances Variable

_allowances 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

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

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

About

Events (8)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (4)

State Variables (15)

name

Parameters

symbol

Parameters

decimals

Parameters

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

allowance

Parameters

approve

Parameters

Requirements

transferFrom

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

push

Parameters

Requirements

pull

Parameters

Requirements

move

Parameters

Requirements

permit

Parameters

Requirements

owner

Parameters

isOwner

Parameters

renounceOwnership

Parameters

Modifiers

transferOwnership

Parameters

Modifiers

Requirements

isBridge

Parameters

transferAndCall

Parameters

Modifiers

Requirements

transferDistribution

Parameters

Requirements