I’ve just finished reconciling the Goodies’ The DAO Token Balance contact that they are planning to use to refund ETCs to The DAO token holders on the Ethereum Classic blockchain.
See:
- github.com/bokkypoobah/TheDAOETCTokenBalance
- How can I verify that my The DAO token balance is correct when the Goodies provide an ETC refund on the Ethereum Classic chain? (Ethereum.StackExchange.com)
- How can I verify that my The DAO token balance is correct when the Goodies provide an ETC refund on the Ethereum Classic chain? (Reddit)
DAOBalanceSnapShot Contract
From dao_balance_snapshot.sol:
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// This contract publishes the balances of the DAO at the moment of the hardfork // After the deployment of the contract the function fill is called many times // in order to fill the balance of each account. contract DAOBalanceSnapShot { uint constant D160 = 0x10000000000000000000000000000000000000000; mapping (address => uint) public balanceOf; address public owner; function DAOBalanceSnapShot() { owner = msg.sender; } uint public totalSupply; uint public totalAccounts; bool public sealed; // The 160 LSB is the address of the balance // The 96 MSB is the balance of that address. function fill(uint[] data) { if ((msg.sender != owner)||(sealed)) throw; for (uint i=0; i<data.length; i++) { address a = address( data[i] & (D160-1) ); uint amount = data[i] / D160; if (balanceOf[a] == 0) { // In case it's filled two times, it only increments once totalAccounts ++; balanceOf[a] = amount; totalSupply += amount; } } } function seal() { if ((msg.sender != owner)||(sealed)) throw; sealed= true; } } |
WhitehatWithdraw Contract
From whetcwithdraw.sol
.sol:
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// The contract that allows DTH to withdraw funds that the white hat // group has managed to retrieve. // // There are 2 ways to use the contract: // 1. withdraw() // 2. proxyWithdraw() // // For a description of each method, take a look at the docstrings. // // License: BSD3 contract DAOBalanceSnapShot { function balanceOf(address _dth) constant returns(uint); function totalSupply() constant returns(uint ); } contract Owned { /// Prevents methods from perfoming any value transfer modifier noEther() {if (msg.value > 0) throw; _} /// Allows only the owner to call a function modifier onlyOwner { if (msg.sender != owner) throw; _ } address owner; function Owned() { owner = msg.sender;} function changeOwner(address _newOwner) onlyOwner { owner = _newOwner; } function getOwner() noEther constant returns (address) { return owner; } } contract WhitehatWithdraw is Owned { uint constant WithdrawType_DIRECT = 1; uint constant WithdrawType_PROXY = 2; DAOBalanceSnapShot daoBalance; mapping (address => uint) paidOut; mapping (bytes32 => bool) usedSignatures; uint totalFunds; uint deployTime; uint closingTime; address whg_donation; address escape; address remainingBeneficary; bool sealed; event Withdraw(address indexed dth, address indexed beneficiary, uint256 amount, uint256 percentageWHG, uint256 withdrawType); event CertifiedDepositorsChanged(address indexed _depositor, bool _allowed); event Deposit(uint amount); event EscapeCalled(uint amount); event RemainingClaimed(uint amount); function fill(uint[] data) onlyOwner { if ((msg.sender != owner)||(sealed)) throw; for (uint i=0; i< data.length; i+= 2) { address dth = address(data[i]); uint amount = uint(data[i+1]); paidOut[dth] = amount; totalFunds += amount; } } function seal() { if ((msg.sender != owner)||(sealed)) throw; sealed= true; } function WhitehatWithdraw(address _whg_donation, address _daoBalanceSnapshotAddress, address _escapeAddress, address _remainingBeneficiary) { whg_donation = _whg_donation; daoBalance = DAOBalanceSnapShot(_daoBalanceSnapshotAddress); escape = _escapeAddress; remainingBeneficary = _remainingBeneficiary; totalFunds = msg.value; deployTime = now; closingTime = 24 weeks; } /// Calculates the remaining funds available for a DTH to withdraw /// /// @param _dth The address of the DAO Token Holder for whom /// to get the funds remaining for withdrawal /// @return The amount of funds remaining for withdrawal function calculateWithdraw(address _dth) constant noEther returns(uint) { uint tokens = daoBalance.balanceOf(_dth); uint acumulatedReward = tokens * totalFunds / daoBalance.totalSupply(); if (acumulatedReward < paidOut[_dth]) { return 0; } return acumulatedReward - paidOut[_dth]; } /// The core of the withdraw functionality. It is called by all other withdraw functions /// /// @param _dth The address of the DAO token holder for whom the /// withdrawal is going to happen /// @param _beneficiary The address that will receive the _percentage of /// the funds corresponding to the _dth. /// @param _percentageWHG The percentage of the funds that will be donated to the /// White Hat Group. It should be a number ranging from 0 /// to 100. Anything not claimed by the DTH will be going /// as a donation to the Whitehat Group. /// @param _withdrawType method used to withdraw (1) Direct (2) Proxy (3) bot (4) owner function commonWithdraw(address _dth, address _beneficiary, uint _percentageWHG, uint _withdrawType) internal { if (_percentageWHG > 100) { throw; } uint toPay = calculateWithdraw(_dth); if (toPay == 0) { return; } if (toPay > this.balance) { toPay = this.balance; } uint portionWhg = toPay * _percentageWHG / 100; uint portionDth = toPay - portionWhg; paidOut[_dth] += toPay; // re-entrancy is not possible due to the use of send() which limits // the forwarded gas thanks to the gas stipend if (portionWhg > 0) { if ( !whg_donation.send(portionWhg) ) { throw; } } if (portionDth > 0) { if (!_beneficiary.send(portionDth) ) { throw; } } Withdraw(_dth, _beneficiary, toPay, _percentageWHG, _withdrawType); } /// The simple withdraw function, where the message sender is considered as /// the DAO token holder whose ratio needs to be retrieved. function withdraw(address _beneficiary, uint _percentageWHG ) noEther { commonWithdraw(msg.sender, _beneficiary, _percentageWHG, WithdrawType_DIRECT); } /// The proxy withdraw function. Anyone can call this for someone else as long /// as he includes signed data retrieved by using web3.eth.sign(address, hash). /// The DAO token holder whose ratio needs to be retrieved is determined by /// performing ecrecover on the signed data. /// /// This function will also allow people to use the ETH chain to give an /// approval for withdrawal in the ETC chain without having to sync the /// ETC chain. The only requirement is that the account that gives the /// approval needs to be an end-user account. Multisig wallets can't do that. function proxyWithdraw(address _beneficiary, uint _percentageWHG, uint8 _v, bytes32 _r, bytes32 _s) noEther { if (usedSignatures[_r]) { throw; } bytes32 _hash = sha3("Withdraw DAOETC to ", _beneficiary, _percentageWHG); address _dth = ecrecover(_hash, _v, _r, _s); usedSignatures[_r] = true; commonWithdraw(_dth, _beneficiary, _percentageWHG, WithdrawType_PROXY); } /// This is the only way to send money to the contract, adding to the total /// amount of ETH to be refunded. function deposit() returns (bool) { totalFunds += msg.value; Deposit(msg.value); return true; } /// Last Resort call, to allow for a reaction if something bad happens to /// the contract or if some security issue is uncovered. function escapeHatch() noEther onlyOwner returns (bool) { uint total = this.balance; if (!escape.send(total)) { throw; } EscapeCalled(total); } /// Allows the claiming of the remaining funds after a given amount of time /// Amount is set to 6 months for now but may still change in the future. function claimRemaining() noEther returns (bool) { if (now < deployTime + closingTime) { throw; } uint total = this.balance; if (!remainingBeneficary.send(total)) { throw; } RemainingClaimed(total); } /// Allows the option to extend (but not shorten!) the closingTime of the /// contract to more than 6 months, perhaps even to infinity if that is /// deemed as the best choice for the DAO Token holders. function extendClosingTime(uint _additionalSeconds) noEther onlyOwner { closingTime += _additionalSeconds; } function () { //no donations throw; } function getPaidOut(address _account) noEther constant returns (uint) { return paidOut[_account]; } function getMyBalance(address _account) noEther constant returns (uint) { return daoBalance.balanceOf(_account); } function getTotalFunds() noEther constant returns (uint) { return totalFunds; } function getWHGDonationAddress() noEther constant returns (address) { return whg_donation; } } |