district0x Network Token
ERC20
This contract is an ERC20 token.
Name
district0x Network Token
Symbol
DNT
Decimals
18
Total Supply
1,000,000,000 DNT
About link description
district0x (DNT) is a cryptocurrency and operates on the Ethereum platform. district0x has a current supply of 1,000,000,000 with 600,000,000 in circulation. The last known price of district0x is 0.13952375 USD and is up 22.58 over the last 24 hours. It is currently trading on 27 active market(s) with $60,639,785.74 traded over the last 24 hours. More information can be found at https://district0x.io/.
Identical Contracts
The following contracts have identical source code.
Stats
Public Functions
28
Event Types
7
Code Size
58,393 bytes
Events (7) keyboard_arrow_up
State Variables (17) keyboard_arrow_up
Functions
changeGrantsController keyboard_arrow_up
Modifiers help
onlyGrantsController checks for the following:
Source Code
function changeGrantsController(address _newController) onlyGrantsController {
grantsController = _newController;
}
totalSupply keyboard_arrow_up
balanceOf keyboard_arrow_up
transfer keyboard_arrow_up
Modifiers help
canTransfer checks for the following:
_value
must be less than or equal to
the result of calling transferableTokens with the sender's address, UNKNOWN ARGUMENT
Source Code
function transfer(address _to, uint256 _value)
canTransfer(msg.sender, _value)
returns (bool)
{
return super.transfer(_to, _value);
}
allowance keyboard_arrow_up
transferFrom keyboard_arrow_up
Modifiers help
canTransfer checks for the following:
_value
must be less than or equal to
the result of calling transferableTokens with the sender's address, UNKNOWN ARGUMENT
Source Code
function transferFrom(
address _from,
address _to,
uint256 _value
) canTransfer(_from, _value) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
approve keyboard_arrow_up
approveAndCall keyboard_arrow_up
Source Code
function approveAndCall(
address _spender,
uint256 _amount,
bytes _extraData
) returns (bool success) {
if (!approve(_spender, _amount)) throw;
ApproveAndCallFallBack(_spender).receiveApproval(
msg.sender,
_amount,
this,
_extraData
);
return true;
}
transferableTokens keyboard_arrow_up
Source Code
function transferableTokens(address holder, uint64 time)
public
constant
returns (uint256)
{
uint256 grantIndex = tokenGrantsCount(holder);
if (grantIndex == 0) return balanceOf(holder); // shortcut for holder without grants
// Iterate through all the grants the holder has, and add all non-vested tokens
uint256 nonVested = 0;
for (uint256 i = 0; i < grantIndex; i++) {
nonVested = SafeMath.add(
nonVested,
nonVestedTokens(grants[holder][i], time)
);
}
// Balance - totalNonVested is the amount of tokens a holder can transfer at any given time
uint256 vestedTransferable = SafeMath.sub(balanceOf(holder), nonVested);
// Return the minimum of how many vested can transfer and other value
// in case there are other limiting transferability factors (default is balanceOf)
return
SafeMath.min256(vestedTransferable, super.transferableTokens(holder, time));
}
grantVestedTokens keyboard_arrow_up
Parameters help
Modifiers help
onlyGrantsController checks for the following:
Requirements help
MAX_GRANTS_PER_ADDRESS
must be greater than or equal to
the result of calling tokenGrantsCount with _to
Source Code
function grantVestedTokens(
address _to,
uint256 _value,
uint64 _start,
uint64 _cliff,
uint64 _vesting,
bool _revokable,
bool _burnsOnRevoke
) public onlyGrantsController {
// Check for date inconsistencies that may cause unexpected behavior
if (_cliff < _start || _vesting < _cliff) {
throw;
}
if (tokenGrantsCount(_to) > MAX_GRANTS_PER_ADDRESS) throw; // To prevent a user being spammed and have his balance locked (out of gas attack when calculating vesting).
uint256 count = grants[_to].push(
TokenGrant(
_revokable ? msg.sender : 0, // avoid storing an extra 20 bytes when it is non-revokable
_value,
_cliff,
_vesting,
_start,
_revokable,
_burnsOnRevoke
)
);
transfer(_to, _value);
NewTokenGrant(msg.sender, _to, _value, count - 1);
}
revokeTokenGrant keyboard_arrow_up
Requirements help
Source Code
function revokeTokenGrant(address _holder, uint256 _grantId) public {
TokenGrant grant = grants[_holder][_grantId];
if (!grant.revokable) {
// Check if grant was revokable
throw;
}
if (grant.granter != msg.sender) {
// Only granter can revoke it
throw;
}
address receiver = grant.burnsOnRevoke ? 0xdead : msg.sender;
uint256 nonVested = nonVestedTokens(grant, uint64(now));
// remove grant from array
delete grants[_holder][_grantId];
grants[_holder][_grantId] = grants[_holder][grants[_holder].length.sub(1)];
grants[_holder].length -= 1;
// This will call MiniMe's doTransfer method, so token is transferred according to
// MiniMe Token logic
doTransfer(_holder, receiver, nonVested);
Transfer(_holder, receiver, nonVested);
}
revokeAllTokenGrants keyboard_arrow_up
tokenGrantsCount keyboard_arrow_up
calculateVestedTokens keyboard_arrow_up
Parameters help
Source Code
function calculateVestedTokens(
uint256 tokens,
uint256 time,
uint256 start,
uint256 cliff,
uint256 vesting
) constant returns (uint256) {
// Shortcuts for before cliff and after vesting cases.
if (time < cliff) return 0;
if (time >= vesting) return tokens;
// Interpolate all vested tokens.
// As before cliff the shortcut returns 0, we can use just calculate a value
// in the vesting rect (as shown in above's figure)
// vestedTokens = tokens * (time - start) / (vesting - start)
uint256 vestedTokens = SafeMath.div(
SafeMath.mul(tokens, SafeMath.sub(time, start)),
SafeMath.sub(vesting, start)
);
return vestedTokens;
}
tokenGrant keyboard_arrow_up
Source Code
function tokenGrant(address _holder, uint256 _grantId)
constant
returns (
address granter,
uint256 value,
uint256 vested,
uint64 start,
uint64 cliff,
uint64 vesting,
bool revokable,
bool burnsOnRevoke
)
{
TokenGrant grant = grants[_holder][_grantId];
granter = grant.granter;
value = grant.value;
start = grant.start;
cliff = grant.cliff;
vesting = grant.vesting;
revokable = grant.revokable;
burnsOnRevoke = grant.burnsOnRevoke;
vested = vestedTokens(grant, uint64(now));
}
lastTokenIsTransferableDate keyboard_arrow_up
Source Code
function lastTokenIsTransferableDate(address holder)
public
constant
returns (uint64 date)
{
date = uint64(now);
uint256 grantIndex = grants[holder].length;
for (uint256 i = 0; i < grantIndex; i++) {
date = SafeMath.max64(grants[holder][i].vesting, date);
}
}
changeController keyboard_arrow_up
Modifiers help
onlyController checks for the following:
Source Code
function changeController(address _newController) onlyController {
controller = _newController;
}
transfer keyboard_arrow_up
Requirements help
Source Code
function transfer(address _to, uint256 _amount) returns (bool success) {
if (!transfersEnabled) throw;
return doTransfer(msg.sender, _to, _amount);
}
transferFrom keyboard_arrow_up
Requirements help
Source Code
function transferFrom(
address _from,
address _to,
uint256 _amount
) returns (bool success) {
// The controller of this contract can move tokens around at will,
// this is important to recognize! Confirm that you trust the
// controller of this contract, which in most situations should be
// another open source smart contract or 0x0
if (msg.sender != controller) {
if (!transfersEnabled) throw;
// The standard ERC 20 transferFrom functionality
if (allowed[_from][msg.sender] < _amount) return false;
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
}
return doTransfer(_from, _to, _amount);
}
approve keyboard_arrow_up
Requirements help
One or more of the following:
Source Code
function approve(address _spender, uint256 _amount) returns (bool success) {
if (!transfersEnabled) throw;
// 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 ((_amount != 0) && (allowed[msg.sender][_spender] != 0)) throw;
// Alerts the token controller of the approve function call
if (isContract(controller)) {
if (!TokenController(controller).onApprove(msg.sender, _spender, _amount))
throw;
}
allowed[msg.sender][_spender] = _amount;
Approval(msg.sender, _spender, _amount);
return true;
}
balanceOfAt keyboard_arrow_up
Source Code
function balanceOfAt(address _owner, uint256 _blockNumber)
constant
returns (uint256)
{
// These next few lines are used when the balance of the token is
// requested before a check point was ever created for this token, it
// requires that the `parentToken.balanceOfAt` be queried at the
// genesis block for that token as this contains initial balance of
// this token
if (
(balances[_owner].length == 0) ||
(balances[_owner][0].fromBlock > _blockNumber)
) {
if (address(parentToken) != 0) {
return
parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
} else {
// Has no parent
return 0;
}
// This will return the expected balance during normal situations
} else {
return getValueAt(balances[_owner], _blockNumber);
}
}
totalSupplyAt keyboard_arrow_up
Source Code
function totalSupplyAt(uint256 _blockNumber) constant returns (uint256) {
// These next few lines are used when the totalSupply of the token is
// requested before a check point was ever created for this token, it
// requires that the `parentToken.totalSupplyAt` be queried at the
// genesis block for this token as that contains totalSupply of this
// token at this block number.
if (
(totalSupplyHistory.length == 0) ||
(totalSupplyHistory[0].fromBlock > _blockNumber)
) {
if (address(parentToken) != 0) {
return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
} else {
return 0;
}
// This will return the expected totalSupply during normal situations
} else {
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
createCloneToken keyboard_arrow_up
Parameters help
Source Code
function createCloneToken(
string _cloneTokenName,
uint8 _cloneDecimalUnits,
string _cloneTokenSymbol,
uint256 _snapshotBlock,
bool _transfersEnabled
) returns (address) {
if (_snapshotBlock == 0) _snapshotBlock = block.number;
MiniMeToken cloneToken = tokenFactory.createCloneToken(
this,
_snapshotBlock,
_cloneTokenName,
_cloneDecimalUnits,
_cloneTokenSymbol,
_transfersEnabled
);
cloneToken.changeController(msg.sender);
// An event to make the token easy to find on the blockchain
NewCloneToken(address(cloneToken), _snapshotBlock);
return address(cloneToken);
}
generateTokens keyboard_arrow_up
Modifiers help
onlyController checks for the following:
Source Code
function generateTokens(address _owner, uint256 _amount)
onlyController
returns (bool)
{
uint256 curTotalSupply = getValueAt(totalSupplyHistory, block.number);
updateValueAtNow(totalSupplyHistory, curTotalSupply.add(_amount));
var previousBalanceTo = balanceOf(_owner);
updateValueAtNow(balances[_owner], previousBalanceTo.add(_amount));
Transfer(0, _owner, _amount);
return true;
}
destroyTokens keyboard_arrow_up
Modifiers help
onlyController checks for the following:
Requirements help
Source Code
function destroyTokens(address _owner, uint256 _amount)
onlyController
returns (bool)
{
uint256 curTotalSupply = getValueAt(totalSupplyHistory, block.number);
if (curTotalSupply < _amount) throw;
updateValueAtNow(totalSupplyHistory, curTotalSupply.sub(_amount));
var previousBalanceFrom = balanceOf(_owner);
if (previousBalanceFrom < _amount) throw;
updateValueAtNow(balances[_owner], previousBalanceFrom.sub(_amount));
Transfer(_owner, 0, _amount);
return true;
}
enableTransfers keyboard_arrow_up
Modifiers help
onlyController checks for the following:
Source Code
function enableTransfers(bool _transfersEnabled) onlyController {
transfersEnabled = _transfersEnabled;
}
constructor keyboard_arrow_up
claimTokens keyboard_arrow_up
Modifiers help
onlyController checks for the following:
Source Code
function claimTokens(address _token, address _claimer) onlyController {
if (_token == 0x0) {
_claimer.transfer(this.balance);
return;
}
ERC20Basic token = ERC20Basic(_token);
uint256 balance = token.balanceOf(this);
token.transfer(_claimer, balance);
ClaimedTokens(_token, _claimer, balance);
}
Internal Functions
Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.
internal MiniMeToken.doTransfer keyboard_arrow_up
Requirements help
Source Code
function doTransfer(
address _from,
address _to,
uint256 _amount
) internal returns (bool) {
if (_amount == 0) {
return true;
}
if (parentSnapShotBlock >= block.number) throw;
// Do not allow transfer to 0x0 or the token contract itself
if ((_to == 0) || (_to == address(this))) throw;
// If the amount being transfered is more than the balance of the
// account the transfer returns false
var previousBalanceFrom = balanceOfAt(_from, block.number);
if (previousBalanceFrom < _amount) {
return false;
}
// Alerts the token controller of the transfer
if (isContract(controller)) {
if (!TokenController(controller).onTransfer(_from, _to, _amount)) throw;
}
// First update the balance array with the new value for the address
// sending the tokens
updateValueAtNow(balances[_from], previousBalanceFrom.sub(_amount));
// Then update the balance array with the new value for the address
// receiving the tokens
var previousBalanceTo = balanceOfAt(_to, block.number);
updateValueAtNow(balances[_to], previousBalanceTo.add(_amount));
// An event to make the transfer easy to find on the blockchain
Transfer(_from, _to, _amount);
return true;
}
internal MiniMeToken.getValueAt keyboard_arrow_up
Source Code
function getValueAt(Checkpoint[] storage checkpoints, uint256 _block)
internal
constant
returns (uint256)
{
if (checkpoints.length == 0) return 0;
// Shortcut for the actual value
if (_block >= checkpoints[checkpoints.length - 1].fromBlock)
return checkpoints[checkpoints.length - 1].value;
if (_block < checkpoints[0].fromBlock) return 0;
// Binary search of the value in the array
uint256 min = 0;
uint256 max = checkpoints.length - 1;
while (max > min) {
uint256 mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock <= _block) {
min = mid;
} else {
max = mid - 1;
}
}
return checkpoints[min].value;
}
internal MiniMeToken.updateValueAtNow keyboard_arrow_up
Source Code
function updateValueAtNow(Checkpoint[] storage checkpoints, uint256 _value)
internal
{
if (
(checkpoints.length == 0) ||
(checkpoints[checkpoints.length - 1].fromBlock < block.number)
) {
Checkpoint newCheckPoint = checkpoints[checkpoints.length++];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
} else {
Checkpoint oldCheckPoint = checkpoints[checkpoints.length - 1];
oldCheckPoint.value = uint128(_value);
}
}
internal MiniMeToken.isContract keyboard_arrow_up
internal MiniMeToken.min keyboard_arrow_up
internal ERC20.doTransfer keyboard_arrow_up
internal VestedToken.vestedTokens keyboard_arrow_up
Source Code
function vestedTokens(TokenGrant grant, uint64 time)
private
constant
returns (uint256)
{
return
calculateVestedTokens(
grant.value,
uint256(time),
uint256(grant.start),
uint256(grant.cliff),
uint256(grant.vesting)
);
}