lgn21st
5/17/2017 - 7:12 PM
aragon.sol
pragma solidity ^0.4.8;
contract ERC20 {
function totalSupply() constant returns (uint);
function balanceOf(address who) constant returns (uint);
function allowance(address owner, address spender) constant returns (uint);
function transfer(address to, uint value) returns (bool ok);
function transferFrom(address from, address to, uint value) returns (bool ok);
function approve(address spender, uint value) returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract SafeMath {
function safeMul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeDiv(uint a, uint b) internal returns (uint) {
assert(b > 0);
uint c = a / b;
assert(a == b * c + a % b);
return c;
}
function safeSub(uint a, uint b) internal returns (uint) {
assert(b <= a);
return a - b;
}
function safeAdd(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c>=a && c>=b);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
function assert(bool assertion) internal {
if (!assertion) {
throw;
}
}
}
contract ApproveAndCallReceiver {
function receiveApproval(address _from, uint256 _amount, address _token, bytes _data);
}
contract Controlled {
/// @notice The address of the controller is the only address that can call
/// a function with this modifier
modifier onlyController { if (msg.sender != controller) throw; _; }
address public controller;
function Controlled() { controller = msg.sender;}
/// @notice Changes the controller of the contract
/// @param _newController The new controller of the contract
function changeController(address _newController) onlyController {
controller = _newController;
}
}
contract AbstractSale {
function saleFinalized() constant returns (bool);
}
contract SaleWallet {
// Public variables
address public multisig;
uint public finalBlock;
AbstractSale public tokenSale;
// @dev Constructor initializes public variables
// @param _multisig The address of the multisig that will receive the funds
// @param _finalBlock Block after which the multisig can request the funds
function SaleWallet(address _multisig, uint _finalBlock, address _tokenSale) {
multisig = _multisig;
finalBlock = _finalBlock;
tokenSale = AbstractSale(_tokenSale);
}
// @dev Receive all sent funds without any further logic
function () public payable {}
// @dev Withdraw function sends all the funds to the wallet if conditions are correct
function withdraw() public {
if (msg.sender != multisig) throw; // Only the multisig can request it
if (block.number > finalBlock) return doWithdraw(); // Allow after the final block
if (tokenSale.saleFinalized()) return doWithdraw(); // Allow when sale is finalized
}
function doWithdraw() internal {
if (!multisig.send(this.balance)) throw;
}
}
contract Controller {
/// @notice Called when `_owner` sends ether to the MiniMe Token contract
/// @param _owner The address that sent the ether to create tokens
/// @return True if the ether is accepted, false if it throws
function proxyPayment(address _owner) payable returns(bool);
/// @notice Notifies the controller about a token transfer allowing the
/// controller to react if desired
/// @param _from The origin of the transfer
/// @param _to The destination of the transfer
/// @param _amount The amount of the transfer
/// @return False if the controller does not authorize the transfer
function onTransfer(address _from, address _to, uint _amount) returns(bool);
/// @notice Notifies the controller about an approval allowing the
/// controller to react if desired
/// @param _owner The address that calls `approve()`
/// @param _spender The spender in the `approve()` call
/// @param _amount The amount in the `approve()` call
/// @return False if the controller does not authorize the approval
function onApprove(address _owner, address _spender, uint _amount)
returns(bool);
}
contract ANPlaceholder is Controller {
address public sale;
ANT public token;
function ANPlaceholder(address _sale, address _ant) {
sale = _sale;
token = ANT(_ant);
}
function changeController(address network) public {
if (msg.sender != sale) throw;
token.changeController(network);
suicide(network);
}
// In between the sale and the network. Default settings for allowing token transfers.
function proxyPayment(address _owner) payable public returns (bool) {
throw;
return false;
}
function onTransfer(address _from, address _to, uint _amount) public returns (bool) {
return true;
}
function onApprove(address _owner, address _spender, uint _amount) public returns (bool) {
return true;
}
}
contract MiniMeToken is ERC20, Controlled {
string public name; //The Token's name: e.g. DigixDAO Tokens
uint8 public decimals; //Number of decimals of the smallest unit
string public symbol; //An identifier: e.g. REP
string public version = 'MMT_0.1'; //An arbitrary versioning scheme
/// @dev `Checkpoint` is the structure that attaches a block number to a
/// given value, the block number attached is the one that last changed the
/// value
struct Checkpoint {
// `fromBlock` is the block number that the value was generated from
uint128 fromBlock;
// `value` is the amount of tokens at a specific block number
uint128 value;
}
// `parentToken` is the Token address that was cloned to produce this token;
// it will be 0x0 for a token that was not cloned
MiniMeToken public parentToken;
// `parentSnapShotBlock` is the block number from the Parent Token that was
// used to determine the initial distribution of the Clone Token
uint public parentSnapShotBlock;
// `creationBlock` is the block number that the Clone Token was created
uint public creationBlock;
// `balances` is the map that tracks the balance of each address, in this
// contract when the balance changes the block number that the change
// occurred is also included in the map
mapping (address => Checkpoint[]) balances;
// `allowed` tracks any extra transfer rights as in all ERC20 tokens
mapping (address => mapping (address => uint256)) allowed;
// Tracks the history of the `totalSupply` of the token
Checkpoint[] totalSupplyHistory;
// Flag that determines if the token is transferable or not.
bool public transfersEnabled;
// The factory used to create new clone tokens
MiniMeTokenFactory public tokenFactory;
////////////////
// Constructor
////////////////
/// @notice Constructor to create a MiniMeToken
/// @param _tokenFactory The address of the MiniMeTokenFactory contract that
/// will create the Clone token contracts, the token factory needs to be
/// deployed first
/// @param _parentToken Address of the parent token, set to 0x0 if it is a
/// new token
/// @param _parentSnapShotBlock Block of the parent token that will
/// determine the initial distribution of the clone token, set to 0 if it
/// is a new token
/// @param _tokenName Name of the new token
/// @param _decimalUnits Number of decimals of the new token
/// @param _tokenSymbol Token Symbol for the new token
/// @param _transfersEnabled If true, tokens will be able to be transferred
function MiniMeToken(
address _tokenFactory,
address _parentToken,
uint _parentSnapShotBlock,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol,
bool _transfersEnabled
) {
tokenFactory = MiniMeTokenFactory(_tokenFactory);
name = _tokenName; // Set the name
decimals = _decimalUnits; // Set the decimals
symbol = _tokenSymbol; // Set the symbol
parentToken = MiniMeToken(_parentToken);
parentSnapShotBlock = _parentSnapShotBlock;
transfersEnabled = _transfersEnabled;
creationBlock = block.number;
}
///////////////////
// ERC20 Methods
///////////////////
/// @notice Send `_amount` tokens to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _amount The amount of tokens to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _amount) returns (bool success) {
if (!transfersEnabled) throw;
return doTransfer(msg.sender, _to, _amount);
}
/// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
/// is approved by `_from`
/// @param _from The address holding the tokens being transferred
/// @param _to The address of the recipient
/// @param _amount The amount of tokens to be transferred
/// @return True if the transfer was successful
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) throw;
allowed[_from][msg.sender] -= _amount;
}
return doTransfer(_from, _to, _amount);
}
/// @dev This is the actual transfer function in the token contract, it can
/// only be called by other functions in this contract.
/// @param _from The address holding the tokens being transferred
/// @param _to The address of the recipient
/// @param _amount The amount of tokens to be transferred
/// @return True if the transfer was successful
function doTransfer(address _from, address _to, uint _amount
) internal returns(bool) {
if (_amount == 0) {
return true;
}
// 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) {
throw;
}
// Alerts the token controller of the transfer
if (isContract(controller)) {
if (!Controller(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 - _amount);
// Then update the balance array with the new value for the address
// receiving the tokens
var previousBalanceTo = balanceOfAt(_to, block.number);
if (previousBalanceTo + _amount < previousBalanceTo) throw; // Check for overflow
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
// An event to make the transfer easy to find on the blockchain
Transfer(_from, _to, _amount);
return true;
}
/// @param _owner The address that's balance is being requested
/// @return The balance of `_owner` at the current block
function balanceOf(address _owner) constant returns (uint256 balance) {
return balanceOfAt(_owner, block.number);
}
/// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on
/// its behalf. This is a modified version of the ERC20 approve function
/// to be a little bit safer
/// @param _spender The address of the account able to transfer the tokens
/// @param _amount The amount of tokens to be approved for transfer
/// @return True if the approval was successful
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 (!Controller(controller).onApprove(msg.sender, _spender, _amount))
throw;
}
allowed[msg.sender][_spender] = _amount;
Approval(msg.sender, _spender, _amount);
return true;
}
/// @dev This function makes it easy to read the `allowed[]` map
/// @param _owner The address of the account that owns the token
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens of _owner that _spender is allowed
/// to spend
function allowance(address _owner, address _spender
) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/// @notice `msg.sender` approves `_spender` to send `_amount` tokens on
/// its behalf, and then a function is triggered in the contract that is
/// being approved, `_spender`. This allows users to use their tokens to
/// interact with contracts in one function call instead of two
/// @param _spender The address of the contract able to transfer the tokens
/// @param _amount The amount of tokens to be approved for transfer
/// @return True if the function call was successful
function approveAndCall(address _spender, uint256 _amount, bytes _extraData
) returns (bool success) {
approve(_spender, _amount);
// This portion is copied from ConsenSys's Standard Token Contract. It
// calls the receiveApproval function that is part of the contract that
// is being approved (`_spender`). The function should look like:
// `receiveApproval(address _from, uint256 _amount, address
// _tokenContract, bytes _extraData)` It is assumed that the call
// *should* succeed, otherwise the plain vanilla approve would be used
ApproveAndCallReceiver(_spender).receiveApproval(
msg.sender,
_amount,
this,
_extraData
);
return true;
}
/// @dev This function makes it easy to get the total number of tokens
/// @return The total number of tokens
function totalSupply() constant returns (uint) {
return totalSupplyAt(block.number);
}
////////////////
// Query balance and totalSupply in History
////////////////
/// @dev Queries the balance of `_owner` at a specific `_blockNumber`
/// @param _owner The address from which the balance will be retrieved
/// @param _blockNumber The block number when the balance is queried
/// @return The balance at `_blockNumber`
function balanceOfAt(address _owner, uint _blockNumber) constant
returns (uint) {
// 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);
}
}
/// @notice Total amount of tokens at a specific `_blockNumber`.
/// @param _blockNumber The block number when the totalSupply is queried
/// @return The total amount of tokens at `_blockNumber`
function totalSupplyAt(uint _blockNumber) constant returns(uint) {
// 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);
}
}
function min(uint a, uint b) internal returns (uint) {
return a < b ? a : b;
}
////////////////
// Clone Token Method
////////////////
/// @notice Creates a new clone token with the initial distribution being
/// this token at `_snapshotBlock`
/// @param _cloneTokenName Name of the clone token
/// @param _cloneDecimalUnits Number of decimals of the smallest unit
/// @param _cloneTokenSymbol Symbol of the clone token
/// @param _snapshotBlock Block when the distribution of the parent token is
/// copied to set the initial distribution of the new clone token;
/// if the block is higher than the actual block, the current block is used
/// @param _transfersEnabled True if transfers are allowed in the clone
/// @return The address of the new MiniMeToken Contract
function createCloneToken(
string _cloneTokenName,
uint8 _cloneDecimalUnits,
string _cloneTokenSymbol,
uint _snapshotBlock,
bool _transfersEnabled
) returns(address) {
if (_snapshotBlock > block.number) _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);
}
////////////////
// Generate and destroy tokens
////////////////
/// @notice Generates `_amount` tokens that are assigned to `_owner`
/// @param _owner The address that will be assigned the new tokens
/// @param _amount The quantity of tokens generated
/// @return True if the tokens are generated correctly
function generateTokens(address _owner, uint _amount
) onlyController returns (bool) {
uint curTotalSupply = getValueAt(totalSupplyHistory, block.number);
if (curTotalSupply + _amount < curTotalSupply) throw; // Check for overflow
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
var previousBalanceTo = balanceOf(_owner);
if (previousBalanceTo + _amount < previousBalanceTo) throw; // Check for overflow
updateValueAtNow(balances[_owner], previousBalanceTo + _amount);
Transfer(0, _owner, _amount);
return true;
}
/// @notice Burns `_amount` tokens from `_owner`
/// @param _owner The address that will lose the tokens
/// @param _amount The quantity of tokens to burn
/// @return True if the tokens are burned correctly
function destroyTokens(address _owner, uint _amount
) onlyController returns (bool) {
uint curTotalSupply = getValueAt(totalSupplyHistory, block.number);
if (curTotalSupply < _amount) throw;
updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount);
var previousBalanceFrom = balanceOf(_owner);
if (previousBalanceFrom < _amount) throw;
updateValueAtNow(balances[_owner], previousBalanceFrom - _amount);
Transfer(_owner, 0, _amount);
return true;
}
////////////////
// Enable tokens transfers
////////////////
/// @notice Enables token holders to transfer their tokens freely if true
/// @param _transfersEnabled True if transfers are allowed in the clone
function enableTransfers(bool _transfersEnabled) onlyController {
transfersEnabled = _transfersEnabled;
}
////////////////
// Internal helper functions to query and set a value in a snapshot array
////////////////
/// @dev `getValueAt` retrieves the number of tokens at a given block number
/// @param checkpoints The history of values being queried
/// @param _block The block number to retrieve the value at
/// @return The number of tokens being queried
function getValueAt(Checkpoint[] storage checkpoints, uint _block
) constant internal returns (uint) {
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
uint min = 0;
uint max = checkpoints.length-1;
while (max > min) {
uint mid = (max + min + 1)/ 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
} else {
max = mid-1;
}
}
return checkpoints[min].value;
}
/// @dev `updateValueAtNow` used to update the `balances` map and the
/// `totalSupplyHistory`
/// @param checkpoints The history of data being updated
/// @param _value The new number of tokens
function updateValueAtNow(Checkpoint[] storage checkpoints, uint _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);
}
}
/// @dev Internal function to determine if an address is a contract
/// @param _addr The address being queried
/// @return True if `_addr` is a contract
function isContract(address _addr) constant internal returns(bool) {
uint size;
if (_addr == 0) return false;
assembly {
size := extcodesize(_addr)
}
return size>0;
}
/// @notice The fallback function: If the contract's controller has not been
/// set to 0, then the `proxyPayment` method is called which relays the
/// ether and creates tokens as described in the token controller contract
function () payable {
if (isContract(controller)) {
if (! Controller(controller).proxyPayment.value(msg.value)(msg.sender))
throw;
} else {
throw;
}
}
////////////////
// Events
////////////////
event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
}
////////////////
// MiniMeTokenFactory
////////////////
/// @dev This contract is used to generate clone contracts from a contract.
/// In solidity this is the way to create a contract from a contract of the
/// same class
contract MiniMeTokenFactory {
/// @notice Update the DApp by creating a new token with new functionalities
/// the msg.sender becomes the controller of this clone token
/// @param _parentToken Address of the token being cloned
/// @param _snapshotBlock Block of the parent token that will
/// determine the initial distribution of the clone token
/// @param _tokenName Name of the new token
/// @param _decimalUnits Number of decimals of the new token
/// @param _tokenSymbol Token Symbol for the new token
/// @param _transfersEnabled If true, tokens will be able to be transferred
/// @return The address of the new token contract
function createCloneToken(
address _parentToken,
uint _snapshotBlock,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol,
bool _transfersEnabled
) returns (MiniMeToken) {
MiniMeToken newToken = new MiniMeToken(
this,
_parentToken,
_snapshotBlock,
_tokenName,
_decimalUnits,
_tokenSymbol,
_transfersEnabled
);
newToken.changeController(msg.sender);
return newToken;
}
}
/*
Copyright 2017, Jorge Izquierdo (Aragon Foundation)
Based on VestedToken.sol from https://github.com/OpenZeppelin/zeppelin-solidity
SafeMath – Copyright (c) 2016 Smart Contract Solutions, Inc.
MiniMeToken – Copyright 2017, Jordi Baylina (Giveth)
*/
// @dev MiniMeIrrevocableVestedToken is a derived version of MiniMeToken adding the
// ability to createTokenGrants which are basically a transfer that limits the
// receiver of the tokens how can he spend them over time.
// For simplicity, token grants are not saved in MiniMe type checkpoints.
// Vanilla cloning ANT will clone it into a MiniMeToken without vesting.
// More complex cloning could account for past vesting calendars.
contract MiniMeIrrevocableVestedToken is MiniMeToken, SafeMath {
// Keep the struct at 2 sstores (1 slot for value + 64 * 3 (dates) + 20 (address) = 2 slots (2nd slot is 212 bytes, lower than 256))
struct TokenGrant {
address granter;
uint256 value;
uint64 cliff;
uint64 vesting;
uint64 start;
}
event NewTokenGrant(address indexed from, address indexed to, uint256 value, uint64 start, uint64 cliff, uint64 vesting);
mapping (address => TokenGrant[]) public grants;
mapping (address => bool) canCreateGrants;
address vestingWhitelister;
modifier canTransfer(address _sender, uint _value) {
if (_value > spendableBalanceOf(_sender)) throw;
_;
}
modifier onlyVestingWhitelister {
if (msg.sender != vestingWhitelister) throw;
_;
}
function MiniMeIrrevocableVestedToken (
address _tokenFactory,
address _parentToken,
uint _parentSnapShotBlock,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol,
bool _transfersEnabled
) MiniMeToken(_tokenFactory, _parentToken, _parentSnapShotBlock, _tokenName, _decimalUnits, _tokenSymbol, _transfersEnabled) {
vestingWhitelister = msg.sender;
doSetCanCreateGrants(vestingWhitelister, true);
}
// @dev Add canTransfer modifier before allowing transfer and transferFrom to go through
function transfer(address _to, uint _value)
canTransfer(msg.sender, _value)
public
returns (bool success) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint _value)
canTransfer(_from, _value)
public
returns (bool success) {
return super.transferFrom(_from, _to, _value);
}
function spendableBalanceOf(address _holder) constant public returns (uint) {
return transferableTokens(_holder, uint64(now));
}
function grantVestedTokens(
address _to,
uint256 _value,
uint64 _start,
uint64 _cliff,
uint64 _vesting) public {
// Check start, cliff and vesting are properly order to ensure correct functionality of the formula.
if (_cliff < _start) throw;
if (_vesting < _start) throw;
if (_vesting < _cliff) throw;
if (!canCreateGrants[msg.sender]) throw;
if (tokenGrantsCount(_to) > 20) throw; // To prevent a user being spammed and have his balance locked (out of gas attack when calculating vesting).
TokenGrant memory grant = TokenGrant(msg.sender, _value, _cliff, _vesting, _start);
grants[_to].push(grant);
if (!transfer(_to, _value)) throw;
NewTokenGrant(msg.sender, _to, _value, _cliff, _vesting, _start);
}
function setCanCreateGrants(address _addr, bool _allowed)
onlyVestingWhitelister public {
doSetCanCreateGrants(_addr, _allowed);
}
function doSetCanCreateGrants(address _addr, bool _allowed)
internal {
canCreateGrants[_addr] = _allowed;
}
function changeVestingWhitelister(address _newWhitelister) onlyVestingWhitelister public {
doSetCanCreateGrants(vestingWhitelister, false);
vestingWhitelister = _newWhitelister;
doSetCanCreateGrants(vestingWhitelister, true);
}
// @dev Not allow token grants
function revokeTokenGrant(address _holder, uint _grantId) public {
throw;
}
//
function tokenGrantsCount(address _holder) constant public returns (uint index) {
return grants[_holder].length;
}
function tokenGrant(address _holder, uint _grantId) constant public returns (address granter, uint256 value, uint256 vested, uint64 start, uint64 cliff, uint64 vesting) {
TokenGrant grant = grants[_holder][_grantId];
granter = grant.granter;
value = grant.value;
start = grant.start;
cliff = grant.cliff;
vesting = grant.vesting;
vested = vestedTokens(grant, uint64(now));
}
function vestedTokens(TokenGrant grant, uint64 time) internal constant returns (uint256) {
return calculateVestedTokens(
grant.value,
uint256(time),
uint256(grant.start),
uint256(grant.cliff),
uint256(grant.vesting)
);
}
// transferableTokens
// | _/-------- NonVestedTokens
// | _/
// | _/
// | _/
// | _/
// | /
// | .|
// | . |
// | . |
// | . |
// | . |
// | . |
// +===+===========+---------+----------> time
// Start Clift Vesting
function calculateVestedTokens(
uint256 tokens,
uint256 time,
uint256 start,
uint256 cliff,
uint256 vesting) internal 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 this function to
// calculate it.
// vestedTokens = tokens * (time - start) / (vesting - start)
uint256 vestedTokens = safeDiv(
safeMul(
tokens,
safeSub(time, start)
),
safeSub(vesting, start)
);
return vestedTokens;
}
function nonVestedTokens(TokenGrant grant, uint64 time) internal constant returns (uint256) {
// Of all the tokens of the grant, how many of them are not vested?
// grantValue - vestedTokens
return safeSub(grant.value, vestedTokens(grant, time));
}
// @dev The date in which all tokens are transferable for the holder
// Useful for displaying purposes (not used in any logic calculations)
function lastTokenIsTransferableDate(address holder) constant public returns (uint64 date) {
date = uint64(now);
uint256 grantIndex = tokenGrantsCount(holder);
for (uint256 i = 0; i < grantIndex; i++) {
date = max64(grants[holder][i].vesting, date);
}
return date;
}
// @dev How many tokens can a holder transfer at a point in time
function transferableTokens(address holder, uint64 time) constant public 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 = safeAdd(nonVested, nonVestedTokens(grants[holder][i], time));
}
// Balance - totalNonVested is the amount of tokens a holder can transfer at any given time
return safeSub(balanceOf(holder), nonVested);
}
}
/*
Copyright 2017, Jorge Izquierdo (Aragon Foundation)
*/
contract ANT is MiniMeIrrevocableVestedToken {
// @dev ANT constructor just parametrizes the MiniMeIrrevocableVestedToken constructor
function ANT(
address _tokenFactory
) MiniMeIrrevocableVestedToken(
_tokenFactory,
0x0, // no parent token
0, // no snapshot block number from parent
"Aragon Network Token", // Token name
18, // Decimals
"ANT", // Symbol
true // Enable transfers
) {}
}