Contract

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

•  contract Registry *
•    - function register(string name, string ...
•    - function transfer(string name, addres ...
•    - function get(string name)
•    - function Registry()
•    - function whois(string name)
•    - function remove(string name)
•    - function download()

More Options

• Similar
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2016-07-06
*/

// A name registry in Ethereum

// "Real" attempts to a name registry with Ethereum:
// <http://etherid.org/> <https://github.com/sinking-point/dns2/>

// TODO: use the registry interface described in
// <https://github.com/ethereum/wiki/wiki/Standardized_Contract_APIs>?

// Standard strings are poor, we need an extension library,
// github.com/Arachnid/solidity-stringutils/strings.sol TODO: use it as soon as https://github.com/Arachnid/solidity-stringutils/issues/1 is solved.
// import "strings.sol";

contract Registry {

  // using strings for *; // TODO see above

  address public nic; // The Network Information Center
  
  struct Record {
    string value; // IP addresses, emails, etc TODO accept an array
		     // as soon as we have a strings library to
		     // serialize/deserialize. TODO type the values with an Enum
    address holder;
    bool exists; // Or a more detailed state, with an enum?
    uint idx;
  }
  mapping (string => Record) records;
  mapping (uint => string) index;
  
  // TODO define accessors instead
  uint public maxRecords;
  uint public currentRecords;

  event debug(string indexed label, string msg);
  event created(string indexed label, string indexed name, address holder, uint block);
  event deleted(string indexed label, string indexed name, address holder, uint block);
  
  // "value" should be a comma-separated list of values. Solidity
  // public functions cannot use arrays of strings :-( TODO: solve it
  // when we'll have strings.
  function register(string name, string value) {
    /* TODO: pay the price */
    uint i;
    if (records[name].exists) {
      if (msg.sender != records[name].holder) { // TODO: use modifiers instead
	throw;
      }
      else {
	i = records[name].idx;
      }
    }
    else {
      records[name].idx = maxRecords;
      i = maxRecords;
      maxRecords++;
    }
    records[name].value = value;
    records[name].holder = msg.sender;
    records[name].exists = true;
    currentRecords++;
    index[i] = name;
    created("CREATION", name, msg.sender, block.number);	  
  }

  function transfer(string name, address to) {
    if (records[name].exists) {
      if (msg.sender != records[name].holder) {
	throw;
      }
      records[name].holder = to;
    }
    else {
      throw;
    }
  }
  
  function get(string name) constant returns(bool exists, string value) {
    if (records[name].exists) {
      exists = true;
      value = records[name].value;
    } else {
      exists = false;
    }
  }

  // Constructor
  function Registry() {
    nic = msg.sender;
    currentRecords = 0;
    maxRecords = 0;
    register("NIC", "Automatically created by for the registry"); // TODO may fail if not
    // enough gas in the creating transaction?
  }
  

  function whois(string name) constant returns(bool exists, string value, address holder) {
    if (records[name].exists) {
      exists = true;
      value = records[name].value;
      holder = records[name].holder;
    } else {
      exists = false;
    }
  }

  function remove(string name) {
    uint i;
    if (records[name].exists) {
      if (msg.sender != records[name].holder) {
	throw;
      }
      else {
	i = records[name].idx;
      }
    }
    else {
      throw; // 404. Too bad we cannot add content to throw.
    }
    records[name].exists = false;
    currentRecords--;
    deleted("DELETION", name, msg.sender, block.number);	  
  }

  function download() returns(string all) {
    if (msg.sender != nic) {
	throw;
      }
    all = "NOT YET IMPLEMENTED";
    // Looping over all the records is easy:
    //for uint (i = 0; i < maxRecords; i++) {
    //	if (records[index[i]].exists) {
    
    // Or we could use an iterable mapping may
    // be this library
    // <https://github.com/ethereum/dapp-bin/blob/master/library/iterable_mapping.sol>

    // The difficult part is to construct an answer, since Solidity
    // does not provide string concatenation, or the ability to return
    // arrays.

	// TODO: provide a function to access one item, using its index,
	// and to let the caller loops from 0 to maxRecords
	// http://stackoverflow.com/questions/37606839/how-to-return-mapping-list-in-solidity-ethereum-contract/37643972#37643972
  }
  
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":false,"inputs":[{"name":"name","type":"string"},{"name":"value","type":"string"}],"name":"register","outputs":[],"type":"function"},{"constant":false,"inputs":[],"name":"download","outputs":[{"name":"all","type":"string"}],"type":"function"},{"constant":true,"inputs":[],"name":"currentRecords","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[{"name":"name","type":"string"}],"name":"get","outputs":[{"name":"exists","type":"bool"},{"name":"value","type":"string"}],"type":"function"},{"constant":true,"inputs":[],"name":"maxRecords","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"nic","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[{"name":"name","type":"string"}],"name":"remove","outputs":[],"type":"function"},{"constant":true,"inputs":[{"name":"name","type":"string"}],"name":"whois","outputs":[{"name":"exists","type":"bool"},{"name":"value","type":"string"},{"name":"holder","type":"address"}],"type":"function"},{"constant":false,"inputs":[{"name":"name","type":"string"},{"name":"to","type":"address"}],"name":"transfer","outputs":[],"type":"function"},{"inputs":[],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"label","type":"string"},{"indexed":false,"name":"msg","type":"string"}],"name":"debug","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"label","type":"string"},{"indexed":true,"name":"name","type":"string"},{"indexed":false,"name":"holder","type":"address"},{"indexed":false,"name":"block","type":"uint256"}],"name":"created","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"label","type":"string"},{"indexed":true,"name":"name","type":"string"},{"indexed":false,"name":"holder","type":"address"},{"indexed":false,"name":"block","type":"uint256"}],"name":"deleted","type":"event"}]

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