false
false
0

Contract Address Details

0xE163a1C2691E596a6cfFf7eC3858945c813112aa

Contract Name
Entropy
Creator
0x267258–a347de at 0xf3ad1c–055b45
Balance
0 CLO
Tokens
Fetching tokens...
Transactions
4 Transactions
Transfers
0 Transfers
Gas Used
236,683
Last Balance Update
16290143
Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
Contract name:
Entropy




Optimization enabled
true
Compiler version
v0.5.1+commit.c8a2cb62




Optimization runs
200
EVM Version
default




Verified at
2024-09-26T15:31:30.670087Z

Contract source code

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.5.1;

contract Lottery_interface {
    function get_round() public view returns (uint256);
    function get_phase() public view returns (uint8); // 0 - inactive / 1 - deposits phase and entropy collecting / 2 - entropy reveal phase
}

contract Entropy {
    address public owner = msg.sender;
    address public lottery_contract;
    
    struct provider
    {
        uint256 round;
        bytes32 entropy_hash;
    }
    
    uint256 public collateral_threshold = 0.2 ether;     // Collateral for one entropy submission
    mapping (bytes32=>bool) public prohibited_hashes;       // A mapping of already used entropy submissions
    mapping (address=>provider) public entropy_providers;   // A mapping of active entropy submissions of the round
    
    uint256 public entropy_reward = 0;                  // Collected entropy reward for the current round
    
    uint256 public entropy = 0;                         // A number used as entropy input for the main Lottery Contract
    uint256 public current_round = 0;
    uint256 public num_providers = 0;                   // The number of entropy providers for the current round
    
    function() external payable
    {
        deposit_entropy_reward();
    }
    
    function get_entropy() public view returns (uint256)
    {
        return entropy;
    }
    
    function deposit_entropy_reward() public payable 
    {
        entropy_reward += msg.value;
    }
    
    function new_round() public only_lottery_contract
    {
        entropy_reward = address(this).balance; // All unrevealed entropy collaterals are now next round rewards
        current_round  = Lottery_interface(lottery_contract).get_round(); // Update the round
        num_providers  = 0;
    }
    
    function submit_entropy(bytes32 _entropy_hash) public payable 
    {
        require(msg.value == collateral_threshold, "Collateral amount is incorrect");
        require(!prohibited_hashes[_entropy_hash], "This entropy input was already used previously");
        require(entropy_providers[msg.sender].round < current_round, "This address is already an entropy provider in this round");
        require(Lottery_interface(lottery_contract).get_phase() == 1, "Entropy submissions are only allowed during the depositing lottery phase");
        
        prohibited_hashes[_entropy_hash] = true; // Mark this hash as "already used" to prevent its future uses
        
        entropy_providers[msg.sender].round = current_round;
        entropy_providers[msg.sender].entropy_hash = _entropy_hash;
        
        num_providers++;
    }
    
    function reveal_entropy(uint256 _entropy_payload, uint256 _salt) public
    {
        require(entropy_providers[msg.sender].round == current_round, "The address is trying to reveal the entropy for inappropriate round");
        require(sha256(abi.encodePacked(_entropy_payload, _salt)) == entropy_providers[msg.sender].entropy_hash, "Entropy values do not match the provided hash");
        // require(Lottery_interface(lottery_contract).get_phase() == 2, "Entropy reveals are only allowed during the reveal phase");
        entropy += _entropy_payload;
        msg.sender.transfer(collateral_threshold + (entropy_reward / num_providers));
    }
    
    function test_hash(uint256 _entropy_payload, uint256 _salt) pure public returns (bytes32)
    {
        return sha256(abi.encodePacked(_entropy_payload, _salt));
    }
    
    
    modifier only_owner
    {
        require(msg.sender == owner);
        _;
    }
    
    modifier only_lottery_contract
    {
        require(msg.sender == lottery_contract);
        _;
    }

    function set_lottery_contract(address payable _new_contract) public only_owner
    {
        lottery_contract = _new_contract;
    }
}

Contract ABI

[{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"new_round","inputs":[],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[],"name":"deposit_entropy_reward","inputs":[],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"current_round","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"entropy","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":""}],"name":"lottery_contract","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"get_entropy","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"entropy_reward","inputs":[],"constant":true},{"type":"function","stateMutability":"pure","payable":false,"outputs":[{"type":"bytes32","name":""}],"name":"test_hash","inputs":[{"type":"uint256","name":"_entropy_payload"},{"type":"uint256","name":"_salt"}],"constant":true},{"type":"function","stateMutability":"payable","payable":true,"outputs":[],"name":"submit_entropy","inputs":[{"type":"bytes32","name":"_entropy_hash"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":""}],"name":"owner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":""}],"name":"prohibited_hashes","inputs":[{"type":"bytes32","name":""}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"set_lottery_contract","inputs":[{"type":"address","name":"_new_contract"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"reveal_entropy","inputs":[{"type":"uint256","name":"_entropy_payload"},{"type":"uint256","name":"_salt"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"round"},{"type":"bytes32","name":"entropy_hash"}],"name":"entropy_providers","inputs":[{"type":"address","name":""}],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"collateral_threshold","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":""}],"name":"num_providers","inputs":[],"constant":true},{"type":"fallback","stateMutability":"payable","payable":true}]

Contract Creation Code

Verify & Publish 
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Deployed ByteCode

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