Contract Name:
Contribution
Contract Source Code:
File 1 of 1 : Contribution
pragma solidity ^0.4.15;
contract TokenController {
/// @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 Controlled {
/// @notice The address of the controller is the only address that can call
/// a function with this modifier
modifier onlyController { require(msg.sender == controller); _; }
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 ApproveAndCallFallBack {
function receiveApproval(address from, uint256 _amount, address _token, bytes _data);
}
contract MiniMeToken is 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) {
require(transfersEnabled);
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) {
require(transfersEnabled);
// The standard ERC 20 transferFrom functionality
if (allowed[_from][msg.sender] < _amount) return false;
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;
}
require(parentSnapShotBlock < block.number);
// Do not allow transfer to 0x0 or the token contract itself
require((_to != 0) && (_to != address(this)));
// 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)) {
require(TokenController(controller).onTransfer(_from, _to, _amount));
}
// 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);
require(previousBalanceTo + _amount >= previousBalanceTo); // 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) {
require(transfersEnabled);
// 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
require((_amount == 0) || (allowed[msg.sender][_spender] == 0));
// Alerts the token controller of the approve function call
if (isContract(controller)) {
require(TokenController(controller).onApprove(msg.sender, _spender, _amount));
}
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) {
require(approve(_spender, _amount));
ApproveAndCallFallBack(_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);
}
}
////////////////
// 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 zero 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 == 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);
}
////////////////
// 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 = totalSupply();
require(curTotalSupply + _amount >= curTotalSupply); // Check for overflow
uint previousBalanceTo = balanceOf(_owner);
require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
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 = totalSupply();
require(curTotalSupply >= _amount);
uint previousBalanceFrom = balanceOf(_owner);
require(previousBalanceFrom >= _amount);
updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount);
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 storage newCheckPoint = checkpoints[ checkpoints.length++ ];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
} else {
Checkpoint storage 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;
}
/// @dev Helper function to return a min betwen the two uints
function min(uint a, uint b) internal returns (uint) {
return a < b ? a : b;
}
/// @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 {
require(isContract(controller));
require(TokenController(controller).proxyPayment.value(msg.value)(msg.sender));
}
//////////
// Safety Methods
//////////
/// @notice This method can be used by the controller to extract mistakenly
/// sent tokens to this contract.
/// @param _token The address of the token contract that you want to recover
/// set to 0 in case you want to extract ether.
function claimTokens(address _token) public onlyController {
if (_token == 0x0) {
controller.transfer(this.balance);
return;
}
MiniMeToken token = MiniMeToken(_token);
uint balance = token.balanceOf(this);
token.transfer(controller, balance);
ClaimedTokens(_token, controller, balance);
}
////////////////
// Events
////////////////
event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
event Transfer(address indexed _from, address indexed _to, uint256 _amount);
event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _amount
);
}
contract CND is MiniMeToken {
/**
* @dev Constructor
*/
uint256 public constant IS_CND_CONTRACT_MAGIC_NUMBER = 0x1338;
function CND(address _tokenFactory)
MiniMeToken(
_tokenFactory,
0x0, // no parent token
0, // no snapshot block number from parent
"Cindicator Token", // Token name
18, // Decimals
"CND", // Symbol
true // Enable transfers
)
{}
function() payable {
require(false);
}
}
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;
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Contribution is Controlled, TokenController {
using SafeMath for uint256;
struct WhitelistedInvestor {
uint256 tier;
bool status;
uint256 contributedAmount;
}
mapping(address => WhitelistedInvestor) investors;
Tier[4] public tiers;
uint256 public tierCount;
MiniMeToken public cnd;
bool public transferable = false;
uint256 public October12_2017 = 1507830400;
address public contributionWallet;
address public foundersWallet;
address public advisorsWallet;
address public bountyWallet;
bool public finalAllocation;
uint256 public totalTokensSold;
bool public paused = false;
modifier notAllocated() {
require(finalAllocation == false);
_;
}
modifier endedSale() {
require(tierCount == 4); //when last one finished it should be equal to 4
_;
}
modifier tokenInitialized() {
assert(address(cnd) != 0x0);
_;
}
modifier initialized() {
Tier tier = tiers[tierCount];
assert(tier.initializedTime() != 0);
_;
}
/// @notice Provides information if contribution is open
/// @return False if the contribuion is closed
function contributionOpen() public constant returns(bool) {
Tier tier = tiers[tierCount];
return (getBlockTimestamp() >= tier.startTime() &&
getBlockTimestamp() <= tier.endTime() &&
tier.finalizedTime() == 0);
}
modifier notPaused() {
require(!paused);
_;
}
function Contribution(address _contributionWallet, address _foundersWallet, address _advisorsWallet, address _bountyWallet) {
require(_contributionWallet != 0x0);
require(_foundersWallet != 0x0);
require(_advisorsWallet != 0x0);
require(_bountyWallet != 0x0);
contributionWallet = _contributionWallet;
foundersWallet = _foundersWallet;
advisorsWallet =_advisorsWallet;
bountyWallet = _bountyWallet;
tierCount = 0;
}
/// @notice Initializes CND token to contribution
/// @param _cnd The address of the token contract that you want to set
function initializeToken(address _cnd) public onlyController {
assert(CND(_cnd).controller() == address(this));
assert(CND(_cnd).IS_CND_CONTRACT_MAGIC_NUMBER() == 0x1338);
require(_cnd != 0x0);
cnd = CND(_cnd);
}
/// @notice Initializes Tier contribution
/// @param _tierNumber number of tier to initialize
/// @param _tierAddress address of deployed tier
function initializeTier(
uint256 _tierNumber,
address _tierAddress
) public onlyController tokenInitialized
{
Tier tier = Tier(_tierAddress);
assert(tier.controller() == address(this));
//cannot be more than 4 tiers
require(_tierNumber >= 0 && _tierNumber <= 3);
assert(tier.IS_TIER_CONTRACT_MAGIC_NUMBER() == 0x1337);
// check if tier is not defined
assert(tiers[_tierNumber] == address(0));
tiers[_tierNumber] = tier;
InitializedTier(_tierNumber, _tierAddress);
}
/// @notice If anybody sends Ether directly to this contract, consider the sender will
/// be rejected.
function () public {
require(false);
}
/// @notice Amount of tokens an investor can purchase
/// @param _investor investor address
/// @return number of tokens
function investorAmountTokensToBuy(address _investor) public constant returns(uint256) {
WhitelistedInvestor memory investor = investors[_investor];
Tier tier = tiers[tierCount];
uint256 leftToBuy = tier.maxInvestorCap().sub(investor.contributedAmount).mul(tier.exchangeRate());
return leftToBuy;
}
/// @notice Notifies if an investor is whitelisted for contribution
/// @param _investor investor address
/// @param _tier tier Number
/// @return number of tokens
function isWhitelisted(address _investor, uint256 _tier) public constant returns(bool) {
WhitelistedInvestor memory investor = investors[_investor];
return (investor.tier <= _tier && investor.status);
}
/// @notice interface for founders to whitelist investors
/// @param _addresses array of investors
/// @param _tier tier Number
/// @param _status enable or disable
function whitelistAddresses(address[] _addresses, uint256 _tier, bool _status) public onlyController {
for (uint256 i = 0; i < _addresses.length; i++) {
address investorAddress = _addresses[i];
require(investors[investorAddress].contributedAmount == 0);
investors[investorAddress] = WhitelistedInvestor(_tier, _status, 0);
}
}
/// @notice Public function to buy tokens
function buy() public payable {
proxyPayment(msg.sender);
}
/// use buy function instead of proxyPayment
/// the param address is useless, it always reassigns to msg.sender
function proxyPayment(address) public payable
notPaused
initialized
returns (bool)
{
assert(isCurrentTierCapReached() == false);
assert(contributionOpen());
require(isWhitelisted(msg.sender, tierCount));
doBuy();
return true;
}
/// @notice Notifies the controller about a token transfer allowing the
/// controller to react if desired
/// @return False if the controller does not authorize the transfer
function onTransfer(address /* _from */, address /* _to */, uint256 /* _amount */) returns(bool) {
return (transferable || getBlockTimestamp() >= October12_2017 );
}
/// @notice Notifies the controller about an approval allowing the
/// controller to react if desired
/// @return False if the controller does not authorize the approval
function onApprove(address /* _owner */, address /* _spender */, uint /* _amount */) returns(bool) {
return (transferable || getBlockTimestamp() >= October12_2017);
}
/// @notice Allows founders to set transfers before October12_2017
/// @param _transferable set True if founders want to let people make transfers
function allowTransfers(bool _transferable) onlyController {
transferable = _transferable;
}
/// @notice calculates how many tokens left for sale
/// @return Number of tokens left for tier
function leftForSale() public constant returns(uint256) {
Tier tier = tiers[tierCount];
uint256 weiLeft = tier.cap().sub(tier.totalInvestedWei());
uint256 tokensLeft = weiLeft.mul(tier.exchangeRate());
return tokensLeft;
}
/// @notice actual method that funds investor and contribution wallet
function doBuy() internal {
Tier tier = tiers[tierCount];
assert(msg.value <= tier.maxInvestorCap());
address caller = msg.sender;
WhitelistedInvestor storage investor = investors[caller];
uint256 investorTokenBP = investorAmountTokensToBuy(caller);
require(investorTokenBP > 0);
if(investor.contributedAmount == 0) {
assert(msg.value >= tier.minInvestorCap());
}
uint256 toFund = msg.value;
uint256 tokensGenerated = toFund.mul(tier.exchangeRate());
// check that at least 1 token will be generated
require(tokensGenerated >= 1);
uint256 tokensleftForSale = leftForSale();
if(tokensleftForSale > investorTokenBP ) {
if(tokensGenerated > investorTokenBP) {
tokensGenerated = investorTokenBP;
toFund = investorTokenBP.div(tier.exchangeRate());
}
}
if(investorTokenBP > tokensleftForSale) {
if(tokensGenerated > tokensleftForSale) {
tokensGenerated = tokensleftForSale;
toFund = tokensleftForSale.div(tier.exchangeRate());
}
}
investor.contributedAmount = investor.contributedAmount.add(toFund);
tier.increaseInvestedWei(toFund);
if (tokensGenerated == tokensleftForSale) {
finalize();
}
assert(cnd.generateTokens(caller, tokensGenerated));
totalTokensSold = totalTokensSold.add(tokensGenerated);
contributionWallet.transfer(toFund);
NewSale(caller, toFund, tokensGenerated);
uint256 toReturn = msg.value.sub(toFund);
if (toReturn > 0) {
caller.transfer(toReturn);
Refund(toReturn);
}
}
/// @notice This method will can be called by the anybody to make final allocation
/// @return result if everything went succesfully
function allocate() public notAllocated endedSale returns(bool) {
finalAllocation = true;
uint256 totalSupplyCDN = totalTokensSold.mul(100).div(75); // calculate 100%
uint256 foundersAllocation = totalSupplyCDN.div(5); // 20% goes to founders
assert(cnd.generateTokens(foundersWallet, foundersAllocation));
uint256 advisorsAllocation = totalSupplyCDN.mul(38).div(1000); // 3.8% goes to advisors
assert(cnd.generateTokens(advisorsWallet, advisorsAllocation));
uint256 bountyAllocation = totalSupplyCDN.mul(12).div(1000); // 1.2% goes to bounty program
assert(cnd.generateTokens(bountyWallet, bountyAllocation));
return true;
}
/// @notice This method will can be called by the controller after the contribution period
/// end or by anybody after the `endTime`. This method finalizes the contribution period
function finalize() public initialized {
Tier tier = tiers[tierCount];
assert(tier.finalizedTime() == 0);
assert(getBlockTimestamp() >= tier.startTime());
assert(msg.sender == controller || getBlockTimestamp() > tier.endTime() || isCurrentTierCapReached());
tier.finalize();
tierCount++;
FinalizedTier(tierCount, tier.finalizedTime());
}
/// @notice check if tier cap has reached
/// @return False if it's still open
function isCurrentTierCapReached() public constant returns(bool) {
Tier tier = tiers[tierCount];
return tier.isCapReached();
}
//////////
// Testing specific methods
//////////
function getBlockTimestamp() internal constant returns (uint256) {
return block.timestamp;
}
//////////
// Safety Methods
//////////
/// @notice This method can be used by the controller to extract mistakenly
/// sent tokens to this contract.
/// @param _token The address of the token contract that you want to recover
/// set to 0 in case you want to extract ether.
function claimTokens(address _token) public onlyController {
if (cnd.controller() == address(this)) {
cnd.claimTokens(_token);
}
if (_token == 0x0) {
controller.transfer(this.balance);
return;
}
CND token = CND(_token);
uint256 balance = token.balanceOf(this);
token.transfer(controller, balance);
ClaimedTokens(_token, controller, balance);
}
/// @notice Pauses the contribution if there is any issue
function pauseContribution(bool _paused) onlyController {
paused = _paused;
}
event ClaimedTokens(address indexed _token, address indexed _controller, uint256 _amount);
event NewSale(address indexed _th, uint256 _amount, uint256 _tokens);
event InitializedTier(uint256 _tierNumber, address _tierAddress);
event FinalizedTier(uint256 _tierCount, uint256 _now);
event Refund(uint256 _amount);
}
contract Tier is Controlled {
using SafeMath for uint256;
uint256 public cap;
uint256 public exchangeRate;
uint256 public minInvestorCap;
uint256 public maxInvestorCap;
uint256 public startTime;
uint256 public endTime;
uint256 public initializedTime;
uint256 public finalizedTime;
uint256 public totalInvestedWei;
uint256 public constant IS_TIER_CONTRACT_MAGIC_NUMBER = 0x1337;
modifier notFinished() {
require(finalizedTime == 0);
_;
}
function Tier(
uint256 _cap,
uint256 _minInvestorCap,
uint256 _maxInvestorCap,
uint256 _exchangeRate,
uint256 _startTime,
uint256 _endTime
)
{
require(initializedTime == 0);
assert(_startTime >= getBlockTimestamp());
require(_startTime < _endTime);
startTime = _startTime;
endTime = _endTime;
require(_cap > 0);
require(_cap > _maxInvestorCap);
cap = _cap;
require(_minInvestorCap < _maxInvestorCap && _maxInvestorCap > 0);
minInvestorCap = _minInvestorCap;
maxInvestorCap = _maxInvestorCap;
require(_exchangeRate > 0);
exchangeRate = _exchangeRate;
initializedTime = getBlockTimestamp();
InitializedTier(_cap, _minInvestorCap, maxInvestorCap, _startTime, _endTime);
}
function getBlockTimestamp() internal constant returns (uint256) {
return block.timestamp;
}
function isCapReached() public constant returns(bool) {
return totalInvestedWei == cap;
}
function finalize() public onlyController {
require(finalizedTime == 0);
uint256 currentTime = getBlockTimestamp();
assert(cap == totalInvestedWei || currentTime > endTime || msg.sender == controller);
finalizedTime = currentTime;
}
function increaseInvestedWei(uint256 _wei) external onlyController notFinished {
totalInvestedWei = totalInvestedWei.add(_wei);
IncreaseInvestedWeiAmount(_wei, totalInvestedWei);
}
event InitializedTier(
uint256 _cap,
uint256 _minInvestorCap,
uint256 _maxInvestorCap,
uint256 _startTime,
uint256 _endTime
);
function () public {
require(false);
}
event IncreaseInvestedWeiAmount(uint256 _amount, uint256 _newWei);
}