ETH Price: $3,387.33 (+4.28%)
Gas: 2 Gwei

Contract

0x485bE770a7A1c3BbF286A2136BD045cbf37B5317
 

Overview

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$0.00

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Post115202512020-12-25 3:08:101312 days ago1608865690IN
0x485bE770...bf37B5317
0 ETH0.00325011126.72
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00556813217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00555566216.612
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00555566216.612
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00556813217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00555566216.612
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00555566216.612
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00555566216.612
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200572020-12-25 2:21:161312 days ago1608862876IN
0x485bE770...bf37B5317
0 ETH0.00557074217.2
Post115200552020-12-25 2:20:251312 days ago1608862825IN
0x485bE770...bf37B5317
0 ETH0.00550993214.82905298
Post115200552020-12-25 2:20:251312 days ago1608862825IN
0x485bE770...bf37B5317
0 ETH0.00550993214.82905298
Post115200552020-12-25 2:20:251312 days ago1608862825IN
0x485bE770...bf37B5317
0 ETH0.00550993214.82905298
Post115200552020-12-25 2:20:251312 days ago1608862825IN
0x485bE770...bf37B5317
0 ETH0.00550993214.82905298
Post115200542020-12-25 2:20:161312 days ago1608862816IN
0x485bE770...bf37B5317
0 ETH0.00550735214.82905298
Post115200542020-12-25 2:20:161312 days ago1608862816IN
0x485bE770...bf37B5317
0 ETH0.00550993214.82905298
Post115144582020-12-24 5:38:271313 days ago1608788307IN
0x485bE770...bf37B5317
0 ETH0.0022686188.452
Post115100132020-12-23 13:08:081313 days ago1608728888IN
0x485bE770...bf37B5317
0 ETH0.00304698118.80000175
Post113705752020-12-02 3:09:031335 days ago1606878543IN
0x485bE770...bf37B5317
0 ETH0.000677126.4
Post113705752020-12-02 3:09:031335 days ago1606878543IN
0x485bE770...bf37B5317
0 ETH0.000657125.62
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Contract Source Code Verified (Exact Match)

Contract Name:
PostCert

Compiler Version
v0.5.12+commit.7709ece9

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license
/**
 *Submitted for verification at Etherscan.io on 2019-12-19
*/

// File: contracts\ownership\Ownable.sol

pragma solidity ^0.5.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return msg.sender == _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev Give an account access to this role.
     */
    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    /**
     * @dev Remove an account's access to this role.
     */
    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    /**
     * @dev Check if an account has this role.
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

contract IssuerRole is Ownable {
    using Roles for Roles.Role;

    event IssuerAdded(address indexed account);
    event IssuerRemoved(address indexed account);

    Roles.Role private _issuers;

    constructor () internal {
        _addIssuer(msg.sender);
    }

    modifier onlyIssuer() {
        require(isIssuer(msg.sender), "IssuerRole: caller does not have the issuer role");
        _;
    }

    function isIssuer(address account) public view returns (bool) {
        return _issuers.has(account);
    }

    function addIssuer(address account) public onlyOwner {
        _addIssuer(account);
    }

    function removeIssuer(address account) public onlyOwner {
        _removeIssuer(account);
    }

    function renounceIssuer() public {
        _removeIssuer(msg.sender);
    }

    function _addIssuer(address account) internal {
        _issuers.add(account);
        emit IssuerAdded(account);
    }

    function _removeIssuer(address account) internal {
        _issuers.remove(account);
        emit IssuerRemoved(account);
    }
}

contract PostCert is Ownable, IssuerRole {
    event Posted(bytes32 hash);
    // Need state
    event CertState(bytes32 indexed certHash, uint state);

    function Post(bytes32 hash, uint state) public onlyIssuer {
        // TODO
        emit Posted(hash);
        emit CertState(hash,state);
    }

    function setState(bytes32 hash, uint state) public onlyIssuer {
        emit CertState(hash,state);
    }
}

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"certHash","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"state","type":"uint256"}],"name":"CertState","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"IssuerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"IssuerRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"hash","type":"bytes32"}],"name":"Posted","type":"event"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"hash","type":"bytes32"},{"internalType":"uint256","name":"state","type":"uint256"}],"name":"Post","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"addIssuer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isIssuer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"removeIssuer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceIssuer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"hash","type":"bytes32"},{"internalType":"uint256","name":"state","type":"uint256"}],"name":"setState","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

bzzr://c72001f93b6a430bda81f88132e60a1d9dd570461338b531d239cd1b71c1d948

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.