Quantstamp Token

0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d Copy

ERC20

This contract is an ERC20 token.

Name Quantstamp Token

Symbol QSP

Decimals 18

Total Supply 976,442,388 QSP

About

Quantstamp is a leader in blockchain security providing expert security audits and blockchain solutions. Top crypto and enterprise companies including Ethereum 2.0 (Prysmatic Labs Client), Binance, MakerDAO, Chainlink, eToro, and World Economic Forum choose Quantstamp to secure their blockchain applications. QSP is an ERC-20 token used for verifying smart contracts on the decentralized QSP Security Protocol. Users can buy automated scans of smart contracts with QSP, and validators can earn QSP for helping provide decentralized security scans on the network at protocol.quantstamp.com The decentralized protocol is open source at https://github.com/quantstamp.

Stats

Public Functions 11

Event Types 4

Code Size 14,998 bytes

Events (4)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Burn Event

Parameters

burner	address
value	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
value	uint256

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 0x0000000000000000000000000000000000000000

Source Code

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

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];
  }

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyWhenTransferEnabled checks for the following:

validDestination checks for the following:

_to must not be equal to 0x0

_to must not be equal to the address for this contract

_to must not be equal to owner

_to must not be equal to adminAddr

_to must not be equal to crowdSaleAddr

Requirements

_to must not be equal to 0x0000000000000000000000000000000000000000

Source Code

    function transfer(address _to, uint256 _value) public onlyWhenTransferEnabled validDestination(_to) returns (bool) {
        return super.transfer(_to, _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];
  }

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyWhenTransferEnabled checks for the following:

validDestination checks for the following:

_to must not be equal to 0x0

_to must not be equal to the address for this contract

_to must not be equal to owner

_to must not be equal to adminAddr

_to must not be equal to crowdSaleAddr

Source Code

    function transferFrom(address _from, address _to, uint256 _value) public onlyWhenTransferEnabled validDestination(_to) returns (bool) {
        bool result = super.transferFrom(_from, _to, _value);
        if (result) {
            if (msg.sender == crowdSaleAddr)
                crowdSaleAllowance = crowdSaleAllowance.sub(_value);
            if (msg.sender == adminAddr)
                adminAllowance = adminAllowance.sub(_value);
        }
        return result;
    }

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Source Code

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

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

  function increaseApproval (address _spender, uint _addedValue)
    returns (bool success) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

  function decreaseApproval (address _spender, uint _subtractedValue)
    returns (bool success) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

burn

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following: - owner must be equal to the sender's address - ORtransferEnabled must be true

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

_value must be greater than 0

Source Code

    function burn(uint256 _value) public {
        require(transferEnabled || msg.sender == owner);
        require(balances[msg.sender] >= _value);
        super.burn(_value);
        Transfer(msg.sender, address(0x0), _value);
    }

setCrowdsale

Parameters

Name	Type
_crowdSaleAddr	address
_amountForSale	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

transferEnabled must not be true

_amountForSale must be less than or equal to crowdSaleAllowance

Source Code

    function setCrowdsale(address _crowdSaleAddr, uint256 _amountForSale) external onlyOwner {
        require(!transferEnabled);
        require(_amountForSale <= crowdSaleAllowance);

        // if 0, then full available crowdsale supply is assumed
        uint amount = (_amountForSale == 0) ? crowdSaleAllowance : _amountForSale;

        // Clear allowance of old, and set allowance of new
        approve(crowdSaleAddr, 0);
        approve(_crowdSaleAddr, amount);

        crowdSaleAddr = _crowdSaleAddr;
    }

enableTransfer

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 enableTransfer() external onlyOwner {
        transferEnabled = true;
        approve(crowdSaleAddr, 0);
        approve(adminAddr, 0);
        crowdSaleAllowance = 0;
        adminAllowance = 0;
    }

Quantstamp Token

ERC20

About link description

Stats

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.

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

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

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyWhenTransferEnabled checks for the following:

validDestination 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

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

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyWhenTransferEnabled checks for the following:

validDestination checks for the following:

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

increaseApproval 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

decreaseApproval 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

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

setCrowdsale 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

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

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About

Events (4)

Parameters

Parameters

Parameters

Parameters

transferOwnership

Parameters

Modifiers

Requirements

balanceOf

Parameters

transfer

Parameters

Modifiers

Requirements

allowance

Parameters

transferFrom

Parameters

Modifiers

approve

Parameters

increaseApproval

Parameters

decreaseApproval

Parameters

burn

Parameters

Requirements

setCrowdsale

Parameters

Modifiers

Requirements

enableTransfer

Parameters

Modifiers