Populous Platform

0xd4fa1460f537bb9085d22c7bccb5dd450ef28e3a Copy

ERC20

This contract is an ERC20 token.

Name Populous Platform

Symbol PPT

Decimals 8

Total Supply 53,252,246 PPT

About

Populous (PPT) is a cryptocurrency and operates on the Ethereum platform. Populous has a current supply of 53,252,246 with 53,252,245.99438964 in circulation. The last known price of Populous is 1.64901559 USD and is down -0.65 over the last 24 hours. It is currently trading on 16 active market(s) with $1,932,994.54 traded over the last 24 hours. More information can be found at https://populous.world/.

Identical Contracts

The following contracts have identical source code.

DENT (DENT) - 0x3597bfd533a99c9aa083587b074434e61eb0a258

Stats

Public Functions 19

Event Types 8

Code Size 17,775 bytes

Events (8)

Approval Event

Parameters

owner	address
spender	address
value	uint

Burned Event

Parameters

burner	address
burnedAmount	uint

Minted Event

Parameters

receiver	address
amount	uint

MintingAgentChanged Event

Parameters

addr	address
state	bool

Transfer Event

Parameters

from	address
to	address
value	uint

UpdatedTokenInformation Event

Parameters

newName	string
newSymbol	string

Upgrade Event

Parameters

_from	address
_to	address
_value	uint256

UpgradeAgentSet Event

Parameters

agent

address

Constants (1)

BURN_ADDRESS Constant

address

State Variables (15)

totalSupply Variable

uint

name Variable

string

symbol Variable

string

decimals Variable

uint

releaseAgent Variable

address

released Variable

bool

owner Variable

address

mintingFinished Variable

bool

upgradeMaster Variable

address

upgradeAgent Variable

address

totalUpgraded Variable

uint256

transferAgents Variable

mapping(address => bool)

mintAgents Variable

mapping(address => bool)

balances Variable

mapping(address => uint)

Internal Variable

allowed Variable

mapping(address => mapping(address => uint))

Internal Variable

Functions Expand All Collapse All

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability constant

Source Code

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

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];
}

transfer

Parameters

Name	Type
_to	address
_value	uint

Properties

Visibility public

Mutability transaction

Modifiers

canTransfer checks for the following:

Source Code

function transfer(address _to, uint256 _value)
  canTransfer(msg.sender)
  returns (bool success)
{
  // Call StandardToken.transfer()
  return super.transfer(_to, _value);
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint

Properties

Visibility public

Mutability transaction

Modifiers

canTransfer checks for the following:

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) canTransfer(_from) returns (bool success) {
  // Call StandardToken.transferForm()
  return super.transferFrom(_from, _to, _value);
}

approve

Parameters

Name	Type
_spender	address
_value	uint

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following:

Source Code

function approve(address _spender, uint256 _value) 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
  if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;

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

isToken

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function isToken() public constant returns (bool weAre) {
  return true;
}

upgrade

Parameters

Name	Type
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

UNKNOWN VALUE must not be true

value must not be equal to 0

Source Code

function upgrade(uint256 value) public {
  UpgradeState state = getUpgradeState();
  if (
    !(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading)
  ) {
    // Called in a bad state
    throw;
  }

  // Validate input value.
  if (value == 0) throw;

  balances[msg.sender] = safeSub(balances[msg.sender], value);

  // Take tokens out from circulation
  totalSupply = safeSub(totalSupply, value);
  totalUpgraded = safeAdd(totalUpgraded, value);

  // Upgrade agent reissues the tokens
  upgradeAgent.upgradeFrom(msg.sender, value);
  Upgrade(msg.sender, upgradeAgent, value);
}

setUpgradeAgent

Parameters

Name	Type
agent	address

Properties

Visibility public

Mutability transaction

Requirements

the result of calling canUpgrade must not be true

agent must not be equal to 0x0

upgradeMaster must be equal to the sender's address

the result of calling getUpgradeState must not be equal to UpgradeState.Upgrading

the result of calling undefined must not be true

totalSupply must be equal to UNKNOWN VALUE

Source Code

function setUpgradeAgent(address agent) external {
  if (!canUpgrade()) {
    // The token is not yet in a state that we could think upgrading
    throw;
  }

  if (agent == 0x0) throw;
  // Only a master can designate the next agent
  if (msg.sender != upgradeMaster) throw;
  // Upgrade has already begun for an agent
  if (getUpgradeState() == UpgradeState.Upgrading) throw;

  upgradeAgent = UpgradeAgent(agent);

  // Bad interface
  if (!upgradeAgent.isUpgradeAgent()) throw;
  // Make sure that token supplies match in source and target
  if (upgradeAgent.originalSupply() != totalSupply) throw;

  UpgradeAgentSet(upgradeAgent);
}

getUpgradeState

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function getUpgradeState() public constant returns (UpgradeState) {
  if (!canUpgrade()) return UpgradeState.NotAllowed;
  else if (address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent;
  else if (totalUpgraded == 0) return UpgradeState.ReadyToUpgrade;
  else return UpgradeState.Upgrading;
}

setUpgradeMaster

Parameters

Name	Type
master	address

Properties

Visibility public

Mutability transaction

Requirements

master must not be equal to 0x0

upgradeMaster must be equal to the sender's address

Source Code

function setUpgradeMaster(address master) public {
  if (master == 0x0) throw;
  if (msg.sender != upgradeMaster) throw;
  upgradeMaster = master;
}

canUpgrade

Parameters

This function has no parameters.

Properties

Visibility public

Mutability constant

Source Code

function canUpgrade() public constant returns (bool) {
  return released && super.canUpgrade();
}

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

Source Code

function transferOwnership(address newOwner) onlyOwner {
  if (newOwner != address(0)) {
    owner = newOwner;
  }
}

mint

Parameters

Name	Type
receiver	address
amount	uint

Properties

Visibility public

Mutability transaction

Modifiers

onlyMintAgent checks for the following:

mintAgents for the sender's address must not be true

canMint checks for the following:

mintingFinished must not be true

Source Code

function mint(address receiver, uint256 amount) public onlyMintAgent canMint {
  totalSupply = totalSupply.plus(amount);
  balances[receiver] = balances[receiver].plus(amount);

  // This will make the mint transaction apper in EtherScan.io
  // We can remove this after there is a standardized minting event
  Transfer(0, receiver, amount);
}

setMintAgent

Parameters

Name	Type
addr	address
state	bool

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

canMint checks for the following:

mintingFinished must not be true

Source Code

function setMintAgent(address addr, bool state) public onlyOwner canMint {
  mintAgents[addr] = state;
  MintingAgentChanged(addr, state);
}

setReleaseAgent

Parameters

Name	Type
addr	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

inReleaseState checks for the following:

released must be equal to false

Source Code

function setReleaseAgent(address addr) public onlyOwner inReleaseState(false) {
  // We don't do interface check here as we might want to a normal wallet address to act as a release agent
  releaseAgent = addr;
}

setTransferAgent

Parameters

Name	Type
addr	address
state	bool

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

inReleaseState checks for the following:

released must be equal to false

Source Code

function setTransferAgent(address addr, bool state)
  public
  onlyOwner
  inReleaseState(false)
{
  transferAgents[addr] = state;
}

releaseTokenTransfer

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyReleaseAgent checks for the following:

releaseAgent must be equal to the sender's address

Source Code

function releaseTokenTransfer() public onlyReleaseAgent {
  mintingFinished = true;
  super.releaseTokenTransfer();
}

setTokenInformation

Parameters

Name	Type
_name	string
_symbol	string

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function setTokenInformation(string _name, string _symbol) onlyOwner {
  name = _name;
  symbol = _symbol;

  UpdatedTokenInformation(name, symbol);
}

burn

Parameters

Name	Type
burnAmount	uint

Properties

Visibility public

Mutability transaction

Source Code

function burn(uint256 burnAmount) {
  address burner = msg.sender;
  balances[burner] = safeSub(balances[burner], burnAmount);
  totalSupply = safeSub(totalSupply, burnAmount);
  Burned(burner, burnAmount);
}

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 SafeMath.safeMul

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

One or more of the following: - b must be equal to c / a - OR a must be equal to 0

Source Code

function safeMul(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a * b;
  assert(a == 0 || c / a == b);
  return c;
}

internal SafeMath.safeDiv

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be greater than 0

a must be equal to b * c + UNKNOWN VALUE

Source Code

function safeDiv(uint256 a, uint256 b) internal returns (uint256) {
  assert(b > 0);
  uint256 c = a / b;
  assert(a == b * c + (a % b));
  return c;
}

internal SafeMath.safeSub

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be less than or equal to a

Source Code

function safeSub(uint256 a, uint256 b) internal returns (uint256) {
  assert(b <= a);
  return a - b;
}

internal SafeMath.safeAdd

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

c must be greater than or equal to b

c must be greater than or equal to a

Source Code

function safeAdd(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a + b;
  assert(c >= a && c >= b);
  return c;
}

internal SafeMath.max64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function max64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a >= b ? a : b;
}

internal SafeMath.min64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function min64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a < b ? a : b;
}

internal SafeMath.max256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function max256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a >= b ? a : b;
}

internal SafeMath.min256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function min256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a < b ? a : b;
}

internal SafeMath.assert

Parameters

Name	Type
assertion	bool

Properties

Visibility internal

Mutability transaction

Requirements

assertion must not be true

Source Code

function assert(bool assertion) internal {
  if (!assertion) {
    throw;
  }
}

internal SafeMath.safeMul

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

One or more of the following: - b must be equal to c / a - OR a must be equal to 0

Source Code

function safeMul(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a * b;
  assert(a == 0 || c / a == b);
  return c;
}

internal SafeMath.safeDiv

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be greater than 0

a must be equal to b * c + UNKNOWN VALUE

Source Code

function safeDiv(uint256 a, uint256 b) internal returns (uint256) {
  assert(b > 0);
  uint256 c = a / b;
  assert(a == b * c + (a % b));
  return c;
}

internal SafeMath.safeSub

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be less than or equal to a

Source Code

function safeSub(uint256 a, uint256 b) internal returns (uint256) {
  assert(b <= a);
  return a - b;
}

internal SafeMath.safeAdd

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

c must be greater than or equal to b

c must be greater than or equal to a

Source Code

function safeAdd(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a + b;
  assert(c >= a && c >= b);
  return c;
}

internal SafeMath.max64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function max64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a >= b ? a : b;
}

internal SafeMath.min64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function min64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a < b ? a : b;
}

internal SafeMath.max256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function max256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a >= b ? a : b;
}

internal SafeMath.min256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function min256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a < b ? a : b;
}

internal SafeMath.assert

Parameters

Name	Type
assertion	bool

Properties

Visibility internal

Mutability transaction

Requirements

assertion must not be true

Source Code

function assert(bool assertion) internal {
  if (!assertion) {
    throw;
  }
}

internal SafeMath.safeMul

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

One or more of the following: - b must be equal to c / a - OR a must be equal to 0

Source Code

function safeMul(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a * b;
  assert(a == 0 || c / a == b);
  return c;
}

internal SafeMath.safeDiv

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be greater than 0

a must be equal to b * c + UNKNOWN VALUE

Source Code

function safeDiv(uint256 a, uint256 b) internal returns (uint256) {
  assert(b > 0);
  uint256 c = a / b;
  assert(a == b * c + (a % b));
  return c;
}

internal SafeMath.safeSub

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

b must be less than or equal to a

Source Code

function safeSub(uint256 a, uint256 b) internal returns (uint256) {
  assert(b <= a);
  return a - b;
}

internal SafeMath.safeAdd

Parameters

Name	Type
a	uint
b	uint

Properties

Visibility internal

Mutability transaction

Requirements

c must be greater than or equal to b

c must be greater than or equal to a

Source Code

function safeAdd(uint256 a, uint256 b) internal returns (uint256) {
  uint256 c = a + b;
  assert(c >= a && c >= b);
  return c;
}

internal SafeMath.max64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function max64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a >= b ? a : b;
}

internal SafeMath.min64

Parameters

Name	Type
a	uint64
b	uint64

Properties

Visibility internal

Mutability constant

Source Code

function min64(uint64 a, uint64 b) internal constant returns (uint64) {
  return a < b ? a : b;
}

internal SafeMath.max256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function max256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a >= b ? a : b;
}

internal SafeMath.min256

Parameters

Name	Type
a	uint256
b	uint256

Properties

Visibility internal

Mutability constant

Source Code

function min256(uint256 a, uint256 b) internal constant returns (uint256) {
  return a < b ? a : b;
}

internal SafeMath.assert

Parameters

Name	Type
assertion	bool

Properties

Visibility internal

Mutability transaction

Requirements

assertion must not be true

Source Code

function assert(bool assertion) internal {
  if (!assertion) {
    throw;
  }
}

Populous Platform

ERC20

About link description

Identical Contracts

Stats

Events (8) keyboard_arrow_up

Approval Event

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

Burned Event

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

Minted Event

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

MintingAgentChanged 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.

UpdatedTokenInformation Event

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

Upgrade Event

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

UpgradeAgentSet Event

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

Constants (1) keyboard_arrow_up

BURN_ADDRESS Constant

State Variables (15) keyboard_arrow_up

totalSupply Variable

name Variable

symbol Variable

decimals Variable

releaseAgent Variable

released Variable

owner Variable

mintingFinished Variable

upgradeMaster Variable

upgradeAgent Variable

totalUpgraded Variable

transferAgents Variable

mintAgents Variable

balances Variable

allowed Variable

Functions Expand All Collapse All

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

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

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.

canTransfer checks for the following:

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.

canTransfer 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

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

isToken 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

upgrade 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

setUpgradeAgent 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

About

Events (8)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (1)

State Variables (15)

balanceOf

Parameters

allowance

Parameters

transfer

Parameters

Modifiers

transferFrom

Parameters

Modifiers

approve

Parameters

Requirements

isToken

Parameters

upgrade

Parameters

Requirements

setUpgradeAgent

Parameters

Requirements

getUpgradeState

Parameters

setUpgradeMaster

Parameters

Requirements

canUpgrade

Parameters

transferOwnership

Parameters

Modifiers

mint

Parameters

Modifiers

setMintAgent

Parameters

Modifiers

setReleaseAgent

Parameters

Modifiers

setTransferAgent

Parameters

Modifiers

releaseTokenTransfer

Parameters

Modifiers

setTokenInformation

Parameters

Modifiers

burn

Parameters

internal SafeMath.safeMul

Parameters

Requirements