Created
February 9, 2016 15:23
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Created using soleditor: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://chriseth.github.io/browser-solidity/?gist=
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library LamportVerify{ | |
function getBit(bytes32 data, uint256 index) constant returns(uint8) { // gets bit `i` from data | |
return uint8(uint256(data) / (2**((255-index)))) & 0x01; | |
} | |
function verify_sig(bytes32 msgHash, bytes32[512] pubKey, bytes32[256] signature) returns(bool){ | |
for(uint i; i < 256; i++){ | |
bytes32 pub; | |
if(getBit(msgHash,i) == 0) pub | |
if(!(pubKey[getBit(msgHash,i)][i] == sha3(signature[i]))) return false; | |
} | |
return true; | |
} | |
} |
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contract BTCRelay{ | |
function getLastBlockHeight() public returns(int256); | |
function getBlockHash(int256) public returns(int256); | |
} | |
contract Powerball{ | |
mapping(address => uint8[6][]) public tickets; | |
mapping(address => uint) public balances; | |
uint public roundStart; | |
uint public constant roundLength = 3 days; | |
bool roundOver = false; | |
enum Phase {Bet,Draw,Claim} | |
Phase currentPhase = Phase.Bet; | |
uint8[] public balls; | |
BTCRelay relay; | |
uint public constant houseEdge = 1; //percent of each ticket | |
address house; | |
uint houseFunds; | |
int256 firstBlock; | |
function Powerball(address relayAddress){ | |
relay = BTCRelay(relayAddress); | |
roundStart = block.timestamp; | |
house = msg.sender; | |
} | |
function buyTicket(uint8[6] numbers){ | |
if(startDraw()) throw; | |
if(!checkNumbers(numbers)) throw; | |
if(msg.value < 2 ether) throw; | |
for(uint16 i = 0; i < msg.value/2; i++){ | |
tickets[msg.sender].push(numbers); | |
} | |
houseFunds += msg.value/100; | |
} | |
function startDraw() returns(bool){ | |
if(block.timestamp > roundStart + roundLength){ | |
if(currentPhase == Phase.Bet){ | |
currentPhase = Phase.Draw; | |
firstBlock = relay.getLastBlockHeight() + 2; | |
} | |
return false; | |
} | |
return true; | |
} | |
function checkNumbers(uint8[6] numbers) returns (bool){ | |
for(var i = 0; i <6; i++){ | |
if (numbers[i] > 69 || numbers[i] <1) return false; | |
} | |
if(numbers[5]>26) return false; | |
return true; | |
} | |
function getBall(uint8 ball) returns(uint8){ | |
if(balls[ball] != 0) return balls[ball]; | |
if(ball > 5) throw; | |
if (relay.getLastBlockHeight() < 8+ball+firstBlock) throw; | |
int256 hash = relay.getBlockHash(firstBlock + ball); | |
if (hash == 0) throw; | |
else if(ball !=5) balls[ball] = uint8(hash) % 69 +1; | |
else balls[ball] = uint8(hash)%26; | |
} | |
} |
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library LamportVerify{ | |
function getBit(bytes32 data, uint256 index) constant returns(uint8) { // gets bit `i` from data | |
return uint8(uint256(data) / (2**((255-index)))) & 0x01; | |
} | |
function verify_sig(bytes32 msgHash, bytes32[2][256] pubKey, bytes32[256] signature) returns(bool){ | |
for(uint i; i < 256; i++){ | |
if(!(pubKey[getBit(msgHash,i)][i] == sha3(signature[i]))) return false; | |
} | |
return true; | |
} | |
} | |
contract qETH { | |
LamportVerify LamportLib; | |
struct account { | |
bool _init; // Has pubKey been set? | |
uint _nonce; // Account nonce for rederiving privKeys. newPrivKey = sha3(masterKey + nonce) | |
bytes32[2][256] _pubKey; // Current public key | |
uint _balance; | |
} | |
mapping(address => account) public accounts; | |
function qETH(address lib){ | |
if (lib == 0) LamportLib = new LamportVerify(); // if no library exists, make new library | |
else LamportLib = LamportVerify(lib); | |
} | |
function hashMsg(address from, address to, uint amount, bytes32[2][256] newKey) public constant returns(bytes32) { // Helper function to construct msg hash | |
return sha3(from,to,amount); | |
} | |
function balanceOf(address addr) constant returns(uint){ | |
return accounts[addr]._balance; | |
} | |
function setPubKey (bytes32[2][256] pubKey) public { | |
accounts[msg.sender]._balance += msg.value; | |
if(accounts[msg.sender]._init == true) throw; | |
accounts[msg.sender]._pubKey = pubKey; | |
accounts[msg.sender]._init = true; | |
} | |
function sendVerify(address from, address to, uint amount, bytes32[2][256] newKey, bytes32[256] sig) { //sig is signature of msgHash | |
bytes32 msgHash = hashMsg(from,to,amount, newKey); | |
if (accounts[from]._init == false || !LamportLib.verify_sig(msgHash,accounts[from]._pubKey,sig)) throw; //Check initialization and Lamport signature | |
if (accounts[from]._balance < amount || accounts[to]._balance + amount < accounts[to]._balance) throw; //Check overflow and underflow | |
accounts[from]._balance -= amount; | |
accounts[from]._nonce++; | |
accounts[from]._pubKey = newKey; | |
} | |
function transferFrom(address from, address to, uint amount, bytes32[2][256] newKey, bytes32[256] sig) public { | |
sendVerify(from, to, amount, newKey, sig); | |
accounts[to]._balance += amount; | |
} | |
function transfer(address to, uint amount, bytes32[2][256] newKey, bytes32[256] sig){ | |
sendVerify(msg.sender, to, amount, newKey, sig); | |
accounts[to]._balance += amount; | |
} | |
function withdraw(address from, address to, uint amount, bytes32[2][256] newKey, bytes32[256] sig) public { | |
sendVerify(from, to, amount, newKey, sig); | |
to.send(amount); | |
} | |
function(){ | |
accounts[msg.sender]._balance += msg.value; | |
} | |
} |
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contract Lotto{ | |
function Under_the_Hood() constant returns ( | |
uint256 UtH_res_, // Reslut | |
uint256 UtH_a_, // 'Random' value | |
uint256 UtH_m_); // Modulus | |
} | |
contract Steal { | |
Lotto lotto = Lotto(0xc0cd30de8fbe76ebe4e14bdb2667436e05f7cfc9); | |
function get() public constant returns (uint _a){ | |
var (res,a,m) = lotto.Under_the_Hood(); | |
return a; | |
} | |
} |
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contract testarray{ | |
bytes32[2][2] data; | |
function add (bytes32[2][2] dat) external { | |
data = dat; | |
} | |
function get(uint8 i, uint8 j) external constant returns (bytes32){ | |
return data[j][i]; | |
} | |
} |
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