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36 lines
1007 B
36 lines
1007 B
pragma solidity ^0.5.0;
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import "./ENS.sol";
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/**
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* A registrar that allocates subdomains to the first person to claim them.
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*/
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contract FIFSRegistrar {
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ENS ens;
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bytes32 rootNode;
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modifier only_owner(bytes32 label) {
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address currentOwner = ens.owner(keccak256(abi.encodePacked(rootNode, label)));
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require(currentOwner == address(0x0) || currentOwner == msg.sender);
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_;
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}
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/**
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* Constructor.
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* @param ensAddr The address of the ENS registry.
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* @param node The node that this registrar administers.
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*/
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constructor(ENS ensAddr, bytes32 node) public {
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ens = ensAddr;
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rootNode = node;
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}
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/**
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* Register a name, or change the owner of an existing registration.
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* @param label The hash of the label to register.
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* @param owner The address of the new owner.
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*/
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function register(bytes32 label, address owner) public only_owner(label) {
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ens.setSubnodeOwner(rootNode, label, owner);
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}
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} |