37 lines
1003 B
Solidity
37 lines
1003 B
Solidity
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pragma solidity ^0.4.18;
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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 subnode) {
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address currentOwner = ens.owner(keccak256(rootNode, subnode));
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require(currentOwner == 0 || 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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function FIFSRegistrar(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 subnode 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 subnode, address owner) public only_owner(subnode) {
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ens.setSubnodeOwner(rootNode, subnode, owner);
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}
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}
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