356 lines
12 KiB
Solidity
356 lines
12 KiB
Solidity
pragma solidity ^0.4.23;
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import "../common/Controlled.sol";
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import "../token/ERC20Token.sol";
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import "../ens/ENS.sol";
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import "../ens/PublicResolver.sol";
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/**
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* @author Ricardo Guilherme Schmidt (Status Research & Development GmbH)
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* @notice Sell ENS subdomains of owned domains.
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*/
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contract ENSSubdomainRegistry is Controlled {
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ERC20Token public token;
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ENS public ens;
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PublicResolver public resolver;
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address public parentRegistry;
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uint256 public releaseDelay = 365 days;
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mapping (bytes32 => Domain) public domains;
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mapping (bytes32 => Account) public accounts;
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event FundsOwner(bytes32 indexed subdomainhash, address fundsOwner);
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event DomainPrice(bytes32 indexed namehash, uint256 price);
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event DomainMoved(bytes32 indexed namehash, address newRegistry);
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enum NodeState { Free, Owned, Moved }
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struct Domain {
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NodeState state;
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uint256 price;
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}
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struct Account {
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uint256 tokenBalance;
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uint256 creationTime;
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address fundsOwner;
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}
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modifier onlyParentRegistry {
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require(msg.sender == parentRegistry, "Migration only.");
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_;
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}
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/**
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* @notice Initializes a UserRegistry contract
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* @param _token fee token base
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* @param _ens Ethereum Name Service root address
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* @param _resolver Default resolver to use in initial settings
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* @param _parentRegistry Address of old registry (if any) for account migration.
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*/
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constructor(
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ERC20Token _token,
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ENS _ens,
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PublicResolver _resolver,
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address _parentRegistry
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)
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public
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{
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token = _token;
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ens = _ens;
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resolver = _resolver;
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parentRegistry = _parentRegistry;
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}
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/**
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* @notice Registers `_userHash` subdomain to `_domainHash` setting msg.sender as owner.
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* @param _userHash choosen unowned subdomain hash
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* @param _domainHash choosen contract owned domain hash
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* @param _account optional address to set at public resolver
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* @param _pubkeyA optional pubkey part A to set at public resolver
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* @param _pubkeyB optional pubkey part B to set at public resolver
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*/
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function register(
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bytes32 _userHash,
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bytes32 _domainHash,
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address _account,
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bytes32 _pubkeyA,
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bytes32 _pubkeyB
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)
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external
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returns(bytes32 subdomainHash)
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{
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Domain memory domain = domains[_domainHash];
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require(domain.state == NodeState.Owned, "Domain unavailable.");
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subdomainHash = keccak256(abi.encodePacked(_domainHash, _userHash));
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require(ens.owner(subdomainHash) == address(0), "ENS node already owned.");
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require(accounts[subdomainHash].creationTime == 0, "Username already registered.");
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accounts[subdomainHash] = Account(domain.price, block.timestamp, msg.sender);
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if(domain.price > 0) {
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require(token.allowance(msg.sender, address(this)) >= domain.price, "Unallowed to spend.");
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require(
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token.transferFrom(
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address(msg.sender),
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address(this),
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domain.price
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),
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"Transfer failed"
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);
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}
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bool resolvePubkey = _pubkeyA != 0 || _pubkeyB != 0;
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bool resolveAccount = _account != address(0);
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if (resolvePubkey || resolveAccount) {
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//set to self the ownship to setup initial resolver
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ens.setSubnodeOwner(_domainHash, _userHash, address(this));
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ens.setResolver(subdomainHash, resolver); //default resolver
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if (resolveAccount) {
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resolver.setAddr(subdomainHash, _account);
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}
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if (resolvePubkey) {
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resolver.setPubkey(subdomainHash, _pubkeyA, _pubkeyB);
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}
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ens.setOwner(subdomainHash, msg.sender);
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}else {
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//transfer ownship of subdone to registrant
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ens.setSubnodeOwner(_domainHash, _userHash, msg.sender);
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}
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}
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/**
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* @notice release subdomain and retrieve locked fee, needs to be called after `releasePeriod` from creation time.
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* @param _userHash `msg.sender` owned subdomain hash
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* @param _domainHash choosen contract owned domain hash
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*/
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function release(
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bytes32 _userHash,
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bytes32 _domainHash
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)
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external
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{
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bool isDomainController = ens.owner(_domainHash) == address(this);
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bytes32 subdomainHash = keccak256(abi.encodePacked(_domainHash, _userHash));
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Account memory account = accounts[subdomainHash];
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require(account.creationTime > 0, "Username not registered.");
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if (isDomainController) {
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require(msg.sender == ens.owner(subdomainHash), "Not owner of ENS node.");
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require(block.timestamp > account.creationTime + releaseDelay, "Release period not reached.");
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ens.setSubnodeOwner(_domainHash, _userHash, address(this));
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ens.setResolver(subdomainHash, address(0));
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ens.setOwner(subdomainHash, address(0));
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} else {
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require(msg.sender == account.fundsOwner, "Not the former account owner.");
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}
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delete accounts[subdomainHash];
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if (account.tokenBalance > 0) {
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require(token.transfer(msg.sender, account.tokenBalance), "Transfer failed");
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}
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}
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/**
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* @notice updates funds owner, useful to move subdomain account to new registry.
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* @param _userHash `msg.sender` owned subdomain hash
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* @param _domainHash choosen contract owned domain hash
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**/
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function updateFundsOwner(
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bytes32 _userHash,
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bytes32 _domainHash
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)
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external
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{
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bytes32 subdomainHash = keccak256(abi.encodePacked(_domainHash, _userHash));
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require(accounts[subdomainHash].creationTime > 0, "Username not registered.");
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require(msg.sender == ens.owner(subdomainHash), "Caller not owner of ENS node.");
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require(ens.owner(_domainHash) == address(this), "Registry not owner of domain.");
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accounts[subdomainHash].fundsOwner = msg.sender;
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emit FundsOwner(subdomainHash, msg.sender);
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}
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/**
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* @notice Migrate account to new registry
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* @param _userHash `msg.sender` owned subdomain hash
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* @param _domainHash choosen contract owned domain hash
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**/
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function moveAccount(
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bytes32 _userHash,
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bytes32 _domainHash
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)
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external
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{
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bytes32 subdomainHash = keccak256(abi.encodePacked(_domainHash, _userHash));
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require(msg.sender == accounts[subdomainHash].fundsOwner, "Callable only by account owner.");
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ENSSubdomainRegistry _newRegistry = ENSSubdomainRegistry(ens.owner(_domainHash));
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Account memory account = accounts[subdomainHash];
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delete accounts[subdomainHash];
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//require(address(this) == _newRegistry.parentRegistry(), "Wrong update.");
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token.approve(_newRegistry, account.tokenBalance);
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_newRegistry.migrateAccount(
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_userHash,
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_domainHash,
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account.tokenBalance,
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account.creationTime,
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account.fundsOwner
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);
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}
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/**
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* @dev callabe only by parent registry to continue migration of domain
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**/
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function migrateDomain(
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bytes32 _domain,
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uint256 _price
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)
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external
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onlyParentRegistry
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{
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require(ens.owner(_domain) == address(this), "ENS domain owner not transfered.");
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assert(domains[_domain].state == NodeState.Free);
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domains[_domain] = Domain(NodeState.Owned, _price);
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}
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/**
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* @dev callable only by parent registry for continue user opt-in migration
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* @param _userHash any subdomain hash coming from parent
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* @param _domainHash choosen contract owned domain hash
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* @param _tokenBalance amount being transferred
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* @param _creationTime any value coming from parent
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* @param _fundsOwner fundsOwner for opt-out/release at domain move
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**/
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function migrateAccount(
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bytes32 _userHash,
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bytes32 _domainHash,
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uint256 _tokenBalance,
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uint256 _creationTime,
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address _fundsOwner
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)
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external
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onlyParentRegistry
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{
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bytes32 subdomainHash = keccak256(abi.encodePacked(_domainHash, _userHash));
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accounts[subdomainHash] = Account(_tokenBalance, _creationTime, _fundsOwner);
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if (_tokenBalance > 0) {
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require(
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token.transferFrom(
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parentRegistry,
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address(this),
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_tokenBalance
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),
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"Error moving funds from old registar."
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);
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}
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}
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/**
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* @notice moves a domain to other Registry (will not move subdomains accounts)
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* @param _newRegistry new registry hodling this domain
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* @param _domain domain being moved
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*/
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function moveDomain(
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ENSSubdomainRegistry _newRegistry,
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bytes32 _domain
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)
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external
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onlyController
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{
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require(domains[_domain].state == NodeState.Owned, "Wrong domain");
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require(ens.owner(_domain) == address(this), "Domain not owned anymore.");
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uint256 price = domains[_domain].price;
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domains[_domain].state = NodeState.Moved;
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ens.setOwner(_domain, _newRegistry);
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_newRegistry.migrateDomain(_domain, price);
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emit DomainMoved(_domain, _newRegistry);
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}
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/**
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* @notice Controller include new domain available to register
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* @param _domain domain owned by user registry being activated
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* @param _price cost to register subnode from this node
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*/
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function setDomainPrice(
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bytes32 _domain,
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uint256 _price
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)
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external
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onlyController
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{
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require(domains[_domain].state == NodeState.Free, "Domain state is not free");
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require(ens.owner(_domain) == address(this), "Registry does not own domain");
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domains[_domain] = Domain(NodeState.Owned, _price);
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emit DomainPrice(_domain, _price);
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}
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/**
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* @notice updates domain price
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* @param _domain active domain being defined price
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* @param _price new price
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*/
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function updateDomainPrice(
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bytes32 _domain,
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uint256 _price
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)
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external
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onlyController
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{
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Domain storage domain = domains[_domain];
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require(domain.state == NodeState.Owned, "Domain not owned");
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domain.price = _price;
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emit DomainPrice(_domain, _price);
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}
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/**
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* @notice updates default public resolver for newly registred subdomains
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* @param _resolver new default resolver
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*/
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function setResolver(
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address _resolver
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)
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external
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onlyController
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{
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resolver = PublicResolver(_resolver);
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}
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function getPrice(bytes32 _domainHash)
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external
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view
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returns(uint256 subdomainPrice)
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{
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subdomainPrice = domains[_domainHash].price;
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}
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function getAccountBalance(bytes32 _subdomainHash)
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external
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view
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returns(uint256 accountBalance)
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{
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accountBalance = accounts[_subdomainHash].tokenBalance;
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}
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function getFundsOwner(bytes32 _subdomainHash)
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external
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view
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returns(address fundsOwner)
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{
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fundsOwner = accounts[_subdomainHash].fundsOwner;
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}
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function getCreationTime(bytes32 _subdomainHash)
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external
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view
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returns(uint256 creationTime)
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{
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creationTime = accounts[_subdomainHash].creationTime;
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}
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function getExpirationTime(bytes32 _subdomainHash)
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external
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view
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returns(uint256 expirationTime)
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{
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expirationTime = accounts[_subdomainHash].creationTime + releaseDelay;
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}
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}
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