// Temporarily have SafeMath here until all contracts have been migrated to SafeMathLib version from OpenZeppelin
pragma solidity ^0.4.11;
/**
* Math operations with safety checks
*/
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;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* Safe unsigned safe math.
*
* https://blog.aragon.one/library-driven-development-in-solidity-2bebcaf88736#.750gwtwli
*
* Originally from https://raw.githubusercontent.com/AragonOne/zeppelin-solidity/master/contracts/SafeMathLib.sol
*
* Maintained here until merged to mainline zeppelin-solidity.
*
*/
library SafeMathLib {
function times(uint a, uint b) returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function minus(uint a, uint b) returns (uint) {
assert(b <= a);
return a - b;
}
function plus(uint a, uint b) returns (uint) {
uint c = a + b;
assert(c>=a);
return c;
}
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/*
* Haltable
*
* Abstract contract that allows children to implement an
* emergency stop mechanism. Differs from Pausable by causing a throw when in halt mode.
*
*
* Originally envisioned in FirstBlood ICO contract.
*/
contract Haltable is Ownable {
bool public halted;
modifier stopInEmergency {
if (halted) throw;
_;
}
modifier onlyInEmergency {
if (!halted) throw;
_;
}
// called by the owner on emergency, triggers stopped state
function halt() external onlyOwner {
halted = true;
}
// called by the owner on end of emergency, returns to normal state
function unhalt() external onlyOwner onlyInEmergency {
halted = false;
}
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* Interface for defining crowdsale pricing.
*/
contract PricingStrategy {
/** Interface declaration. */
function isPricingStrategy() public constant returns (bool) {
return true;
}
/** Self check if all references are correctly set.
*
* Checks that pricing strategy matches crowdsale parameters.
*/
function isSane(address crowdsale) public constant returns (bool) {
return true;
}
/**
* @dev Pricing tells if this is a presale purchase or not.
@param purchaser Address of the purchaser
@return False by default, true if a presale purchaser
*/
function isPresalePurchase(address purchaser) public constant returns (bool) {
return false;
}
/**
* When somebody tries to buy tokens for X eth, calculate how many tokens they get.
*
*
* @param value - What is the value of the transaction send in as wei
* @param tokensSold - how much tokens have been sold this far
* @param weiRaised - how much money has been raised this far in the main token sale - this number excludes presale
* @param msgSender - who is the investor of this transaction
* @param decimals - how many decimal units the token has
* @return Amount of tokens the investor receives
*/
function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint tokenAmount);
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* Finalize agent defines what happens at the end of succeseful crowdsale.
*
* - Allocate tokens for founders, bounties and community
* - Make tokens transferable
* - etc.
*/
contract FinalizeAgent {
function isFinalizeAgent() public constant returns(bool) {
return true;
}
/** Return true if we can run finalizeCrowdsale() properly.
*
* This is a safety check function that doesn't allow crowdsale to begin
* unless the finalizer has been set up properly.
*/
function isSane() public constant returns (bool);
/** Called once by crowdsale finalize() if the sale was success. */
function finalizeCrowdsale();
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* A token that defines fractional units as decimals.
*/
contract FractionalERC20 is ERC20 {
uint public decimals;
}
/**
* Abstract base contract for token sales.
*
* Handle
* - start and end dates
* - accepting investments
* - minimum funding goal and refund
* - various statistics during the crowdfund
* - different pricing strategies
* - different investment policies (require server side customer id, allow only whitelisted addresses)
*
*/
contract Crowdsale is Haltable {
/* Max investment count when we are still allowed to change the multisig address */
uint public MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE = 5;
using SafeMathLib for uint;
/* The token we are selling */
FractionalERC20 public token;
/* How we are going to price our offering */
PricingStrategy public pricingStrategy;
/* Post-success callback */
FinalizeAgent public finalizeAgent;
/* tokens will be transfered from this address */
address public multisigWallet;
/* if the funding goal is not reached, investors may withdraw their funds */
uint public minimumFundingGoal;
/* the UNIX timestamp start date of the crowdsale */
uint public startsAt;
/* the UNIX timestamp end date of the crowdsale */
uint public endsAt;
/* the number of tokens already sold through this contract*/
uint public tokensSold = 0;
/* How many wei of funding we have raised */
uint public weiRaised = 0;
/* Calculate incoming funds from presale contracts and addresses */
uint public presaleWeiRaised = 0;
/* How many distinct addresses have invested */
uint public investorCount = 0;
/* How much wei we have returned back to the contract after a failed crowdfund. */
uint public loadedRefund = 0;
/* How much wei we have given back to investors.*/
uint public weiRefunded = 0;
/* Has this crowdsale been finalized */
bool public finalized;
/* Do we need to have unique contributor id for each customer */
bool public requireCustomerId;
/**
* Do we verify that contributor has been cleared on the server side (accredited investors only).
* This method was first used in FirstBlood crowdsale to ensure all contributors have accepted terms on sale (on the web).
*/
bool public requiredSignedAddress;
/* Server side address that signed allowed contributors (Ethereum addresses) that can participate the crowdsale */
address public signerAddress;
/** How much ETH each address has invested to this crowdsale */
mapping (address => uint256) public investedAmountOf;
/** How much tokens this crowdsale has credited for each investor address */
mapping (address => uint256) public tokenAmountOf;
/** Addresses that are allowed to invest even before ICO offical opens. For testing, for ICO partners, etc. */
mapping (address => bool) public earlyParticipantWhitelist;
/** This is for manul testing for the interaction from owner wallet. You can set it to any value and inspect this in blockchain explorer to see that crowdsale interaction works. */
uint public ownerTestValue;
/** State machine
*
* - Preparing: All contract initialization calls and variables have not been set yet
* - Prefunding: We have not passed start time yet
* - Funding: Active crowdsale
* - Success: Minimum funding goal reached
* - Failure: Minimum funding goal not reached before ending time
* - Finalized: The finalized has been called and succesfully executed
* - Refunding: Refunds are loaded on the contract for reclaim.
*/
enum State{Unknown, Preparing, PreFunding, Funding, Success, Failure, Finalized, Refunding}
// A new investment was made
event Invested(address investor, uint weiAmount, uint tokenAmount, uint128 customerId);
// Refund was processed for a contributor
event Refund(address investor, uint weiAmount);
// The rules were changed what kind of investments we accept
event InvestmentPolicyChanged(bool newRequireCustomerId, bool newRequiredSignedAddress, address newSignerAddress);
// Address early participation whitelist status changed
event Whitelisted(address addr, bool status);
// Crowdsale end time has been changed
event EndsAtChanged(uint newEndsAt);
function Crowdsale(address _token, PricingStrategy _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal) {
owner = msg.sender;
token = FractionalERC20(_token);
setPricingStrategy(_pricingStrategy);
multisigWallet = _multisigWallet;
if(multisigWallet == 0) {
throw;
}
if(_start == 0) {
throw;
}
startsAt = _start;
if(_end == 0) {
throw;
}
endsAt = _end;
// Don't mess the dates
if(startsAt >= endsAt) {
throw;
}
// Minimum funding goal can be zero
minimumFundingGoal = _minimumFundingGoal;
}
/**
* Don't expect to just send in money and get tokens.
*/
function() payable {
throw;
}
/**
* Make an investment.
*
* Crowdsale must be running for one to invest.
* We must have not pressed the emergency brake.
*
* @param receiver The Ethereum address who receives the tokens
* @param customerId (optional) UUID v4 to track the successful payments on the server side
*
*/
function investInternal(address receiver, uint128 customerId) stopInEmergency private {
// Determine if it's a good time to accept investment from this participant
if(getState() == State.PreFunding) {
// Are we whitelisted for early deposit
if(!earlyParticipantWhitelist[receiver]) {
throw;
}
} else if(getState() == State.Funding) {
// Retail participants can only come in when the crowdsale is running
// pass
} else {
// Unwanted state
throw;
}
uint weiAmount = msg.value;
// Account presale sales separately, so that they do not count against pricing tranches
uint tokenAmount = pricingStrategy.calculatePrice(weiAmount, weiRaised - presaleWeiRaised, tokensSold, msg.sender, token.decimals());
if(tokenAmount == 0) {
// Dust transaction
throw;
}
if(investedAmountOf[receiver] == 0) {
// A new investor
investorCount++;
}
// Update investor
investedAmountOf[receiver] = investedAmountOf[receiver].plus(weiAmount);
tokenAmountOf[receiver] = tokenAmountOf[receiver].plus(tokenAmount);
// Update totals
weiRaised = weiRaised.plus(weiAmount);
tokensSold = tokensSold.plus(tokenAmount);
if(pricingStrategy.isPresalePurchase(receiver)) {
presaleWeiRaised = presaleWeiRaised.plus(weiAmount);
}
// Check that we did not bust the cap
if(isBreakingCap(weiAmount, tokenAmount, weiRaised, tokensSold)) {
throw;
}
assignTokens(receiver, tokenAmount);
// Pocket the money
if(!multisigWallet.send(weiAmount)) throw;
// Tell us invest was success
Invested(receiver, weiAmount, tokenAmount, customerId);
}
/**
* Preallocate tokens for the early investors.
*
* Preallocated tokens have been sold before the actual crowdsale opens.
* This function mints the tokens and moves the crowdsale needle.
*
* Investor count is not handled; it is assumed this goes for multiple investors
* and the token distribution happens outside the smart contract flow.
*
* No money is exchanged, as the crowdsale team already have received the payment.
*
* @param fullTokens tokens as full tokens - decimal places added internally
* @param weiPrice Price of a single full token in wei
*
*/
function preallocate(address receiver, uint fullTokens, uint weiPrice) public onlyOwner {
uint tokenAmount = fullTokens * 10**token.decimals();
uint weiAmount = weiPrice * fullTokens; // This can be also 0, we give out tokens for free
weiRaised = weiRaised.plus(weiAmount);
tokensSold = tokensSold.plus(tokenAmount);
investedAmountOf[receiver] = investedAmountOf[receiver].plus(weiAmount);
tokenAmountOf[receiver] = tokenAmountOf[receiver].plus(tokenAmount);
assignTokens(receiver, tokenAmount);
// Tell us invest was success
Invested(receiver, weiAmount, tokenAmount, 0);
}
/**
* Allow anonymous contributions to this crowdsale.
*/
function investWithSignedAddress(address addr, uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
bytes32 hash = sha256(addr);
if (ecrecover(hash, v, r, s) != signerAddress) throw;
if(customerId == 0) throw; // UUIDv4 sanity check
investInternal(addr, customerId);
}
/**
* Track who is the customer making the payment so we can send thank you email.
*/
function investWithCustomerId(address addr, uint128 customerId) public payable {
if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
if(customerId == 0) throw; // UUIDv4 sanity check
investInternal(addr, customerId);
}
/**
* Allow anonymous contributions to this crowdsale.
*/
function invest(address addr) public payable {
if(requireCustomerId) throw; // Crowdsale needs to track partipants for thank you email
if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
investInternal(addr, 0);
}
/**
* Invest to tokens, recognize the payer and clear his address.
*
*/
function buyWithSignedAddress(uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
investWithSignedAddress(msg.sender, customerId, v, r, s);
}
/**
* Invest to tokens, recognize the payer.
*
*/
function buyWithCustomerId(uint128 customerId) public payable {
investWithCustomerId(msg.sender, customerId);
}
/**
* The basic entry point to participate the crowdsale process.
*
* Pay for funding, get invested tokens back in the sender address.
*/
function buy() public payable {
invest(msg.sender);
}
/**
* Finalize a succcesful crowdsale.
*
* The owner can triggre a call the contract that provides post-crowdsale actions, like releasing the tokens.
*/
function finalize() public inState(State.Success) onlyOwner stopInEmergency {
// Already finalized
if(finalized) {
throw;
}
// Finalizing is optional. We only call it if we are given a finalizing agent.
if(address(finalizeAgent) != 0) {
finalizeAgent.finalizeCrowdsale();
}
finalized = true;
}
/**
* Allow to (re)set finalize agent.
*
* Design choice: no state restrictions on setting this, so that we can fix fat finger mistakes.
*/
function setFinalizeAgent(FinalizeAgent addr) onlyOwner {
finalizeAgent = addr;
// Don't allow setting bad agent
if(!finalizeAgent.isFinalizeAgent()) {
throw;
}
}
/**
* Set policy do we need to have server-side customer ids for the investments.
*
*/
function setRequireCustomerId(bool value) onlyOwner {
requireCustomerId = value;
InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
}
/**
* Set policy if all investors must be cleared on the server side first.
*
* This is e.g. for the accredited investor clearing.
*
*/
function setRequireSignedAddress(bool value, address _signerAddress) onlyOwner {
requiredSignedAddress = value;
signerAddress = _signerAddress;
InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
}
/**
* Allow addresses to do early participation.
*
* TODO: Fix spelling error in the name
*/
function setEarlyParicipantWhitelist(address addr, bool status) onlyOwner {
earlyParticipantWhitelist[addr] = status;
Whitelisted(addr, status);
}
/**
* Allow crowdsale owner to close early or extend the crowdsale.
*
* This is useful e.g. for a manual soft cap implementation:
* - after X amount is reached determine manual closing
*
* This may put the crowdsale to an invalid state,
* but we trust owners know what they are doing.
*
*/
function setEndsAt(uint time) onlyOwner {
if(now > time) {
throw; // Don't change past
}
endsAt = time;
EndsAtChanged(endsAt);
}
/**
* Allow to (re)set pricing strategy.
*
* Design choice: no state restrictions on the set, so that we can fix fat finger mistakes.
*/
function setPricingStrategy(PricingStrategy _pricingStrategy) onlyOwner {
pricingStrategy = _pricingStrategy;
// Don't allow setting bad agent
if(!pricingStrategy.isPricingStrategy()) {
throw;
}
}
/**
* Allow to change the team multisig address in the case of emergency.
*
* This allows to save a deployed crowdsale wallet in the case the crowdsale has not yet begun
* (we have done only few test transactions). After the crowdsale is going
* then multisig address stays locked for the safety reasons.
*/
function setMultisig(address addr) public onlyOwner {
// Change
if(investorCount > MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE) {
throw;
}
multisigWallet = addr;
}
/**
* Allow load refunds back on the contract for the refunding.
*
* The team can transfer the funds back on the smart contract in the case the minimum goal was not reached..
*/
function loadRefund() public payable inState(State.Failure) {
if(msg.value == 0) throw;
loadedRefund = loadedRefund.plus(msg.value);
}
/**
* Investors can claim refund.
*
* Note that any refunds from proxy buyers should be handled separately,
* and not through this contract.
*/
function refund() public inState(State.Refunding) {
uint256 weiValue = investedAmountOf[msg.sender];
if (weiValue == 0) throw;
investedAmountOf[msg.sender] = 0;
weiRefunded = weiRefunded.plus(weiValue);
Refund(msg.sender, weiValue);
if (!msg.sender.send(weiValue)) throw;
}
/**
* @return true if the crowdsale has raised enough money to be a successful.
*/
function isMinimumGoalReached() public constant returns (bool reached) {
return weiRaised >= minimumFundingGoal;
}
/**
* Check if the contract relationship looks good.
*/
function isFinalizerSane() public constant returns (bool sane) {
return finalizeAgent.isSane();
}
/**
* Check if the contract relationship looks good.
*/
function isPricingSane() public constant returns (bool sane) {
return pricingStrategy.isSane(address(this));
}
/**
* Crowdfund state machine management.
*
* We make it a function and do not assign the result to a variable, so there is no chance of the variable being stale.
*/
function getState() public constant returns (State) {
if(finalized) return State.Finalized;
else if (address(finalizeAgent) == 0) return State.Preparing;
else if (!finalizeAgent.isSane()) return State.Preparing;
else if (!pricingStrategy.isSane(address(this))) return State.Preparing;
else if (block.timestamp < startsAt) return State.PreFunding;
else if (block.timestamp <= endsAt && !isCrowdsaleFull()) return State.Funding;
else if (isMinimumGoalReached()) return State.Success;
else if (!isMinimumGoalReached() && weiRaised > 0 && loadedRefund >= weiRaised) return State.Refunding;
else return State.Failure;
}
/** This is for manual testing of multisig wallet interaction */
function setOwnerTestValue(uint val) onlyOwner {
ownerTestValue = val;
}
/** Interface marker. */
function isCrowdsale() public constant returns (bool) {
return true;
}
//
// Modifiers
//
/** Modified allowing execution only if the crowdsale is currently running. */
modifier inState(State state) {
if(getState() != state) throw;
_;
}
//
// Abstract functions
//
/**
* Check if the current invested breaks our cap rules.
*
*
* The child contract must define their own cap setting rules.
* We allow a lot of flexibility through different capping strategies (ETH, token count)
* Called from invest().
*
* @param weiAmount The amount of wei the investor tries to invest in the current transaction
* @param tokenAmount The amount of tokens we try to give to the investor in the current transaction
* @param weiRaisedTotal What would be our total raised balance after this transaction
* @param tokensSoldTotal What would be our total sold tokens count after this transaction
*
* @return true if taking this investment would break our cap rules
*/
function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken);
/**
* Check if the current crowdsale is full and we can no longer sell any tokens.
*/
function isCrowdsaleFull() public constant returns (bool);
/**
* Create new tokens or transfer issued tokens to the investor depending on the cap model.
*/
function assignTokens(address receiver, uint tokenAmount) private;
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*/
/**
* Standard ERC20 token with Short Hand Attack and approve() race condition mitigation.
*
* Based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, SafeMath {
/* Token supply got increased and a new owner received these tokens */
event Minted(address receiver, uint amount);
/* Actual balances of token holders */
mapping(address => uint) balances;
/* approve() allowances */
mapping (address => mapping (address => uint)) allowed;
/* Interface declaration */
function isToken() public constant returns (bool weAre) {
return true;
}
function transfer(address _to, uint _value) returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], _value);
balances[_to] = safeAdd(balances[_to], _value);
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint _value) returns (bool success) {
uint _allowance = allowed[_from][msg.sender];
balances[_to] = safeAdd(balances[_to], _value);
balances[_from] = safeSub(balances[_from], _value);
allowed[_from][msg.sender] = safeSub(_allowance, _value);
Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
function approve(address _spender, uint _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;
}
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/**
* A token that can increase its supply by another contract.
*
* This allows uncapped crowdsale by dynamically increasing the supply when money pours in.
* Only mint agents, contracts whitelisted by owner, can mint new tokens.
*
*/
contract MintableToken is StandardToken, Ownable {
using SafeMathLib for uint;
bool public mintingFinished = false;
/** List of agents that are allowed to create new tokens */
mapping (address => bool) public mintAgents;
event MintingAgentChanged(address addr, bool state );
/**
* Create new tokens and allocate them to an address..
*
* Only callably by a crowdsale contract (mint agent).
*/
function mint(address receiver, uint amount) onlyMintAgent canMint public {
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);
}
/**
* Owner can allow a crowdsale contract to mint new tokens.
*/
function setMintAgent(address addr, bool state) onlyOwner canMint public {
mintAgents[addr] = state;
MintingAgentChanged(addr, state);
}
modifier onlyMintAgent() {
// Only crowdsale contracts are allowed to mint new tokens
if(!mintAgents[msg.sender]) {
throw;
}
_;
}
/** Make sure we are not done yet. */
modifier canMint() {
if(mintingFinished) throw;
_;
}
}
/**
* Uncapped ICO crowdsale contract.
*
*
* Intended usage
*
* - A short time window
* - Flat price
* - No cap
*
*/
contract UncappedCrowdsale is Crowdsale {
function UncappedCrowdsale(address _token, PricingStrategy _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal) Crowdsale(_token, _pricingStrategy, _multisigWallet, _start, _end, _minimumFundingGoal) {
}
/**
* Called from invest() to confirm if the curret investment does not break our cap rule.
*/
function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken) {
return false;
}
function isCrowdsaleFull() public constant returns (bool) {
// Uncle Scrooge
return false;
}
function assignTokens(address receiver, uint tokenAmount) private {
MintableToken mintableToken = MintableToken(token);
mintableToken.mint(receiver, tokenAmount);
}
}
If I copy this flat file Remix IDE or compile with solc of version >= 0.4.11, I get invalid bytecode:
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