Olyseum

0x6595b8fd9c920c81500dca94e53cdc712513fb1f Copy

ERC20

This contract is an ERC20 token.

Name Olyseum

Symbol OLY

Decimals 18

Total Supply 5,000,000,000 OLY

About

Olyseum (OLY) is a cryptocurrency and operates on the Ethereum platform. Olyseum has a current supply of 5,000,000,000 with 1,166,187,285.615249 in circulation. The last known price of Olyseum is 0.01660545 USD and is down -0.72 over the last 24 hours. It is currently trading on 7 active market(s) with $658,793.39 traded over the last 24 hours. More information can be found at https://olyseum.com/.

Stats

Public Functions 13

Event Types 3

Code Size 19,369 bytes

Library Use

Uses SafeMath for uint256.

Events (3)

Approval Event

Parameters

owner	address
spender	address
value	uint256

DeferredTransfer Event

Parameters

paymentSigner	address
nonce	uint256
paymentAmount	uint256
paymentCollector	address
paymentFee	uint256
feeCollector	address
statusSuccessful	bool

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (8)

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_decimals Variable

uint8

Internal Variable

_initialized Variable

bool

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowances Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

usedNonces Variable

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

Internal Variable

Functions Expand All Collapse All

initialize

Parameters

Name	Type
name	string
symbol	string
decimals	uint8
totalSupply	uint256
tokenHolder	address

Properties

Visibility public

Mutability transaction

Requirements

_initialized must not be true

totalSupply must be greater than 0

tokenHolder must not be equal to UNKNOWN VALUE

Source Code

function initialize(
  string memory name,
  string memory symbol,
  uint8 decimals,
  uint256 totalSupply,
  address tokenHolder
) public {
  require(!_initialized, "This contract is already initialized");
  require(totalSupply > 0, "Total supply must be greater than 0");

  _name = name;
  _symbol = symbol;
  _decimals = decimals;
  _mint(tokenHolder, totalSupply);
  _initialized = true;
}

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
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

recipient must not be equal to UNKNOWN VALUE

Source Code

function transfer(address recipient, uint256 amount) public returns (bool) {
  _transfer(msg.sender, recipient, amount);
  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
sender	address
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

recipient must not be equal to UNKNOWN VALUE

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

Source Code

function transferFrom(
  address sender,
  address recipient,
  uint256 amount
) public returns (bool) {
  _transfer(sender, recipient, amount);
  _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
  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

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

Source Code

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

publishMessages

Parameters

Name	Type
nonces	uint256[]
paymentAmounts	uint256[]
paymentCollectors	address[]
paymentFees	uint256[]
feeCollectors	address[]
sigsR	bytes32[]
sigsS	bytes32[]
sigsV	uint8[]

Properties

Visibility public

Mutability transaction

Requirements

the number of values in sigsS must be equal to the number of values in sigsV

the number of values in sigsR must be equal to the number of values in sigsS

the number of values in feeCollectors must be equal to the number of values in sigsR

the number of values in paymentFees must be equal to the number of values in feeCollectors

the number of values in paymentCollectors must be equal to the number of values in paymentFees

the number of values in paymentAmounts must be equal to the number of values in paymentCollectors

the number of values in nonces must be equal to the number of values in paymentAmounts

Source Code

function publishMessages(
  uint256[] memory nonces,
  uint256[] memory paymentAmounts,
  address[] memory paymentCollectors,
  uint256[] memory paymentFees,
  address[] memory feeCollectors,
  bytes32[] memory sigsR,
  bytes32[] memory sigsS,
  uint8[] memory sigsV
) public {
  require(
    nonces.length == paymentAmounts.length &&
      paymentAmounts.length == paymentCollectors.length &&
      paymentCollectors.length == paymentFees.length &&
      paymentFees.length == feeCollectors.length &&
      feeCollectors.length == sigsR.length &&
      sigsR.length == sigsS.length &&
      sigsS.length == sigsV.length,
    "Inconsistent message data received"
  );

  for (uint256 i = 0; i < nonces.length; i++) {
    executeMessage(
      nonces[i],
      paymentAmounts[i],
      paymentCollectors[i],
      paymentFees[i],
      feeCollectors[i],
      sigsR[i],
      sigsS[i],
      sigsV[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 OlyToken._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

recipient 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 OlyToken._mint

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

tokenHolder 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 OlyToken._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 OlyToken._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

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 OlyToken._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

Source Code

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

internal OlyToken.executeMessage

Parameters

Name	Type
nonce	uint256
paymentAmount	uint256
paymentCollector	address
paymentFee	uint256
feeCollector	address
sigR	bytes32
sigS	bytes32
sigV	uint8

Properties

Visibility private

Mutability transaction

Source Code

function executeMessage(
  uint256 nonce,
  uint256 paymentAmount,
  address paymentCollector,
  uint256 paymentFee,
  address feeCollector,
  bytes32 sigR,
  bytes32 sigS,
  uint8 sigV
) private {
  bytes32 hash = keccak256(
    abi.encodePacked(
      string("\x19Ethereum Signed Message:\n164Olyseum v1 Transfer Message:"),
      nonce,
      paymentAmount,
      paymentCollector,
      paymentFee,
      msg.sender
    )
  );

  address user = ecrecover(hash, sigV, sigR, sigS);
  uint256 balance = _balances[user];
  bool success = false;
  uint256 totalExpenditure = paymentAmount.add(paymentFee);

  if (
    balance >= totalExpenditure &&
    !usedNonces[user][nonce] &&
    paymentCollector != address(0) &&
    feeCollector != address(0)
  ) {
    success = true;
    usedNonces[user][nonce] = true;

    // Execute transfer
    _balances[user] = balance.sub(totalExpenditure);
    _balances[paymentCollector] = _balances[paymentCollector].add(
      paymentAmount
    );
    _balances[feeCollector] = _balances[feeCollector].add(paymentFee);

    emit Transfer(user, paymentCollector, paymentAmount);
    emit Transfer(user, feeCollector, paymentFee);
  }

  emit DeferredTransfer(
    user,
    nonce,
    paymentAmount,
    paymentCollector,
    paymentFee,
    feeCollector,
    success
  );
}

Olyseum

ERC20

About link description

Stats

Library Use

Events (3) keyboard_arrow_up

Approval Event

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

DeferredTransfer 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

_symbol Variable

_decimals Variable

_initialized Variable

_balances Variable

_allowances Variable

_totalSupply Variable

usedNonces 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

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

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

increaseAllowance 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

decreaseAllowance 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

publishMessages 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.

About

Events (3)

Parameters

Parameters

Parameters

State Variables (8)

initialize

Parameters

Requirements

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

publishMessages

Parameters

Requirements

internal OlyToken._transfer

Parameters

Requirements

internal OlyToken._mint

Parameters

Requirements

internal OlyToken._burn

Parameters

Requirements

internal OlyToken._approve

Parameters

Requirements

internal OlyToken._burnFrom

Parameters

Requirements

internal OlyToken.executeMessage

Parameters