Hydro

0xebbdf302c940c6bfd49c6b165f457fdb324649bc Copy

ERC20

This contract is an ERC20 token.

Name Hydro

Symbol HYDRO

Decimals 18

Total Supply 11,111,111,111 HYDRO

About

Stats

Public Functions 12

Event Types 4

Code Size 8,680 bytes

Library Use

Uses SafeMath for uint256.

Events (4)

Approval Event

Parameters

_owner	address
_spender	address
_amount	uint256

Burn Event

Parameters

_burner	address
_amount	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

_from	address
_to	address
_amount	uint256

State Variables (8)

name Variable

string

decimals Variable

uint8

symbol Variable

string

totalSupply Variable

uint

raindropAddress Variable

address

owner Variable

address

balances Variable

mapping(address => uint256)

allowed Variable

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

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

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  require(newOwner != address(0));
  emit OwnershipTransferred(owner, newOwner);
  owner = newOwner;
}

transfer

Parameters

Name	Type
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function transfer(address _to, uint256 _amount) public returns (bool success) {
  doTransfer(msg.sender, _to, _amount);
  return true;
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

_amount must be less than or equal to allowed for _from for the sender's address

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

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _amount
) public returns (bool success) {
  // The standard ERC 20 transferFrom functionality
  require(allowed[_from][msg.sender] >= _amount);
  allowed[_from][msg.sender] -= _amount;
  doTransfer(_from, _to, _amount);
  return true;
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability constant

Source Code

function balanceOf(address _owner) public constant returns (uint256 balance) {
  return balances[_owner];
}

approve

Parameters

Name	Type
_spender	address
_amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following:

Source Code

function approve(address _spender, uint256 _amount)
  public
  returns (bool success)
{
  // To change the approve amount you first have to reduce the addresses`
  //  allowance to zero by calling `approve(_spender,0)` if it is not
  //  already 0 to mitigate the race condition described here:
  //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
  require((_amount == 0) || (allowed[msg.sender][_spender] == 0));

  allowed[msg.sender][_spender] = _amount;
  emit Approval(msg.sender, _spender, _amount);
  return true;
}

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
) public returns (bool success) {
  tokenRecipient spender = tokenRecipient(_spender);
  if (approve(_spender, _value)) {
    spender.receiveApproval(msg.sender, _value, this, _extraData);
    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

Requirements

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

Source Code

function burn(uint256 _value) public onlyOwner {
  require(balances[msg.sender] >= _value);
  balances[msg.sender] = balances[msg.sender].sub(_value);
  totalSupply = totalSupply.sub(_value);
}

allowance

Parameters

Name	Type
_owner	address
_spender	address

Properties

Visibility public

Mutability constant

Source Code

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

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function totalSupply() public constant returns (uint256) {
  return totalSupply;
}

setRaindropAddress

Parameters

Name	Type
_raindrop	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function setRaindropAddress(address _raindrop) public onlyOwner {
  raindropAddress = _raindrop;
}

authenticate

Parameters

Name	Type
_value	uint
_challenge	uint
_partnerId	uint

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function authenticate(
  uint256 _value,
  uint256 _challenge,
  uint256 _partnerId
) public {
  Raindrop raindrop = Raindrop(raindropAddress);
  raindrop.authenticate(msg.sender, _value, _challenge, _partnerId);
  doTransfer(msg.sender, owner, _value);
}

setBalances

Parameters

Name	Type
_addressList	address[]
_amounts	uint[]

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

the number of values in _addressList must be equal to the number of values in _amounts

Source Code

function setBalances(address[] _addressList, uint256[] _amounts)
  public
  onlyOwner
{
  require(_addressList.length == _amounts.length);
  for (uint256 i = 0; i < _addressList.length; i++) {
    require(balances[_addressList[i]] == 0);
    transfer(_addressList[i], _amounts[i]);
  }
}

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 HydroToken.doTransfer

Parameters

Name	Type
_from	address
_to	address
_amount	uint

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function doTransfer(
  address _from,
  address _to,
  uint256 _amount
) internal {
  // Do not allow transfer to 0x0 or the token contract itself
  require((_to != 0) && (_to != address(this)));
  require(_amount <= balances[_from]);
  balances[_from] = balances[_from].sub(_amount);
  balances[_to] = balances[_to].add(_amount);
  emit Transfer(_from, _to, _amount);
}

Hydro

ERC20

About

Stats

Library Use

Events (4) keyboard_arrow_up

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.

State Variables (8) keyboard_arrow_up

name Variable

decimals Variable

symbol Variable

totalSupply Variable

raindropAddress Variable

owner Variable

balances Variable

allowed 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

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

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

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

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

burn 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

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

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

setRaindropAddress 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

authenticate 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

Events (4)

Parameters

Parameters

Parameters

Parameters

State Variables (8)

transferOwnership

Parameters

Modifiers

Requirements

transfer

Parameters

Requirements

transferFrom

Parameters

Requirements

balanceOf

Parameters

approve

Parameters

Requirements

approveAndCall

Parameters

burn

Parameters

Modifiers

Requirements

allowance

Parameters

totalSupply

Parameters

setRaindropAddress

Parameters

Modifiers

authenticate

Parameters

Requirements

setBalances

Parameters

Modifiers

Requirements

internal HydroToken.doTransfer

Parameters

Requirements