Merge branch 'master' into namewrapper

.gitignore

@@ -3,3 +3,6 @@ artifacts
 cache
 gasreport-*
 .env
+*.DS_Store
+node_modules
+build

.npmignore

@@ -0,0 +1,5 @@
+*.DS_Store
+node_modules/
+
+#Hardhat files
+cache/

.nvmrc

@@ -0,0 +1 @@
+v14.15.0

.solhint.json

@@ -0,0 +1,8 @@
+{
+  "extends": "solhint:default",
+  "rules": {
+    "indent": 2,
+    "max-line-length": false,
+    "quotes": "double"
+  }
+}

.travis.yml

@@ -15,7 +15,6 @@ matrix:
   fast_finish: true
   allow_failures:
     - env: TASK=lint
-
 script:
   - npm run $TASK
 

LICENSE.txt

@@ -0,0 +1,7 @@
+Copyright (c) 2018, True Names Limited
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# ENS
+
+[![Build Status](https://travis-ci.org/ensdomains/ens-contracts.svg?branch=master)](https://travis-ci.org/ensdomains/ens-contracts)
+
+For documentation of the ENS system, see [docs.ens.domains](https://docs.ens.domains/).
+
+## npm package
+
+This repo doubles as an npm package with the compiled JSON contracts
+
+```js
+import {
+  BaseRegistrar,
+  BaseRegistrarImplementation,
+  BulkRenewal,
+  ENS,
+  ENSRegistry,
+  ENSRegistryWithFallback,
+  ETHRegistrarController,
+  FIFSRegistrar,
+  LinearPremiumPriceOracle,
+  PriceOracle,
+  PublicResolver,
+  Resolver,
+  ReverseRegistrar,
+  StablePriceOracle,
+  TestRegistrar
+} from '@ensdomains/ens-contracts'
+```
+
+## Importing from solidity
+
+```
+// Registry
+import '@ensdomains/ens-contracts/contracts/registry/ENS.sol';
+import '@ensdomains/ens-contracts/contracts/registry/ENSRegistry.sol';
+import '@ensdomains/ens-contracts/contracts/registry/ENSRegistryWithFallback.sol';
+import '@ensdomains/ens-contracts/contracts/registry/ReverseRegistrar.sol';
+import '@ensdomains/ens-contracts/contracts/registry/TestRegistrar.sol';
+// EthRegistrar
+import '@ensdomains/ens-contracts/contracts/ethregistrar/BaseRegistrar.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/BaseRegistrarImplementation.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/BulkRenewal.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/BaseRegistrar.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/ETHRegistrarController.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/LinearPremiumPriceOracle.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/PriceOracle.sol';
+import '@ensdomains/ens-contracts/contracts/ethregistrar/StablePriceOracle.sol';
+// Resolvers
+import '@ensdomains/ens-contracts/contracts/resolvers/PublicResolver.sol';
+import '@ensdomains/ens-contracts/contracts/resolvers/Resolver.sol';
+```
+
+##  Accessing to binary file.
+
+If your environment does not have compiler, you can access to the raw hardhat artifacts files at `node_modules/@ensdomains/ens-contracts/artifacts/contracts/${modName}/${contractName}.sol/${contractName}.json`
+
+
+## Contracts
+
+## Registry
+
+The ENS registry is the core contract that lies at the heart of ENS resolution. All ENS lookups start by querying the registry. The registry maintains a list of domains, recording the owner, resolver, and TTL for each, and allows the owner of a domain to make changes to that data. It also includes some generic registrars.
+
+### ENS.sol
+
+Interface of the ENS Registry.
+
+### ENSRegistry
+
+Implementation of the ENS Registry, the central contract used to look up resolvers and owners for domains.
+
+### ENSRegistryWithFallback
+
+The new impelmentation of the ENS Registry after [the 2020 ENS Registry Migration](https://docs.ens.domains/ens-migration-february-2020/technical-description#new-ens-deployment).
+
+### FIFSRegistrar
+
+Implementation of a simple first-in-first-served registrar, which issues (sub-)domains to the first account to request them.
+
+### ReverseRegistrar
+
+Implementation of the reverse registrar responsible for managing reverse resolution via the .addr.reverse special-purpose TLD.
+
+
+### TestRegistrar
+
+Implementation of the `.test` registrar facilitates easy testing of ENS on the Ethereum test networks. Currently deployed on Ropsten network, it provides functionality to instantly claim a domain for test purposes, which expires 28 days after it was claimed.
+
+
+## EthRegistrar
+
+Implements an [ENS](https://ens.domains/) registrar intended for the .eth TLD.
+
+These contracts were audited by ConsenSys dilligence; the audit report is available [here](https://github.com/ConsenSys/ens-audit-report-2019-02).
+
+### BaseRegistrar
+
+BaseRegistrar is the contract that owns the TLD in the ENS registry. This contract implements a minimal set of functionality:
+
+ - The owner of the registrar may add and remove controllers.
+ - Controllers may register new domains and extend the expiry of (renew) existing domains. They can not change the ownership or reduce the expiration time of existing domains.
+ - Name owners may transfer ownership to another address.
+ - Name owners may reclaim ownership in the ENS registry if they have lost it.
+ - Owners of names in the interim registrar may transfer them to the new registrar, during the 1 year transition period. When they do so, their deposit is returned to them in its entirety.
+
+This separation of concerns provides name owners strong guarantees over continued ownership of their existing names, while still permitting innovation and change in the way names are registered and renewed via the controller mechanism.
+
+### EthRegistrarController
+
+EthRegistrarController is the first implementation of a registration controller for the new registrar. This contract implements the following functionality:
+
+ - The owner of the registrar may set a price oracle contract, which determines the cost of registrations and renewals based on the name and the desired registration or renewal duration.
+ - The owner of the registrar may withdraw any collected funds to their account.
+ - Users can register new names using a commit/reveal process and by paying the appropriate registration fee.
+ - Users can renew a name by paying the appropriate fee. Any user may renew a domain, not just the name's owner.
+
+The commit/reveal process is used to avoid frontrunning, and operates as follows:
+
+ 1. A user commits to a hash, the preimage of which contains the name to be registered and a secret value.
+ 2. After a minimum delay period and before the commitment expires, the user calls the register function with the name to register and the secret value from the commitment. If a valid commitment is found and the other preconditions are met, the name is registered.
+
+The minimum delay and expiry for commitments exist to prevent miners or other users from effectively frontrunnig registrations.
+
+### SimplePriceOracle
+
+SimplePriceOracle is a trivial implementation of the pricing oracle for the EthRegistrarController that always returns a fixed price per domain per year, determined by the contract owner.
+
+### StablePriceOracle
+
+StablePriceOracle is a price oracle implementation that allows the contract owner to specify pricing based on the length of a name, and uses a fiat currency oracle to set a fixed price in fiat per name.
+
+## Resolvers
+
+Resolver implements a general-purpose ENS resolver that is suitable for most standard ENS use-cases. The public resolver permits updates to ENS records by the owner of the corresponding name.
+
+PublicResolver includes the following profiles that implements different EIPs.
+
+- ABIResolver = EIP 205 - ABI support (`ABI()`).
+- AddrResolver = EIP 137 - Contract address interface. EIP 2304 - Multicoin support (`addr()`).
+- ContentHashResolver = EIP 1577 - Content hash support (`contenthash()`).
+- InterfaceResolver = EIP 165 - Interface Detection (`supportsInterface()`).
+- NameResolver = EIP 181 - Reverse resolution (`name()`).
+- PubkeyResolver = EIP 619 - SECP256k1 public keys (`pubkey()`).
+- TextResolver = EIP 634 - Text records (`text()`).
+- DNSResolver = Experimental support is available for hosting DNS domains on the Ethereum blockchain via ENS. [The more detail](https://veox-ens.readthedocs.io/en/latest/dns.html) is on the old ENS doc.
+
+## Developer guide
+
+### How to setup
+
+```
+git clone https://github.com/ensdomains/ens-contracts
+cd ens-contracts
+yarn
+```
+
+### How to run tests
+
+```
+yarn test
+```
+
+### How to publish
+
+```
+yarn pub
+```

contracts/dnsregistrar/DNSClaimChecker.sol

@@ -0,0 +1,89 @@
+pragma solidity ^0.8.4;
+
+import "../dnssec-oracle/DNSSEC.sol";
+import "../dnssec-oracle/BytesUtils.sol";
+import "../dnssec-oracle/RRUtils.sol";
+import "@ensdomains/buffer/contracts/Buffer.sol";
+
+library DNSClaimChecker {
+
+    using BytesUtils for bytes;
+    using RRUtils for *;
+    using Buffer for Buffer.buffer;
+
+    uint16 constant CLASS_INET = 1;
+    uint16 constant TYPE_TXT = 16;
+
+    function getOwnerAddress(DNSSEC oracle, bytes memory name, bytes memory proof)
+        internal
+        view
+        returns (address, bool)
+    {
+        // Add "_ens." to the front of the name.
+        Buffer.buffer memory buf;
+        buf.init(name.length + 5);
+        buf.append("\x04_ens");
+        buf.append(name);
+        bytes20 hash;
+        uint32 expiration;
+        // Check the provided TXT record has been validated by the oracle
+        (, expiration, hash) = oracle.rrdata(TYPE_TXT, buf.buf);
+        if (hash == bytes20(0) && proof.length == 0) return (address(0x0), false);
+
+        require(hash == bytes20(keccak256(proof)));
+
+        for (RRUtils.RRIterator memory iter = proof.iterateRRs(0); !iter.done(); iter.next()) {
+            require(RRUtils.serialNumberGte(expiration + iter.ttl, uint32(block.timestamp)), "DNS record is stale; refresh or delete it before proceeding.");
+
+            bool found;
+            address addr;
+            (addr, found) = parseRR(proof, iter.rdataOffset);
+            if (found) {
+                return (addr, true);
+            }
+        }
+
+        return (address(0x0), false);
+    }
+
+    function parseRR(bytes memory rdata, uint idx) internal pure returns (address, bool) {
+        while (idx < rdata.length) {
+            uint len = rdata.readUint8(idx); idx += 1;
+
+            bool found;
+            address addr;
+            (addr, found) = parseString(rdata, idx, len);
+
+            if (found) return (addr, true);
+            idx += len;
+        }
+
+        return (address(0x0), false);
+    }
+
+    function parseString(bytes memory str, uint idx, uint len) internal pure returns (address, bool) {
+        // TODO: More robust parsing that handles whitespace and multiple key/value pairs
+        if (str.readUint32(idx) != 0x613d3078) return (address(0x0), false); // 0x613d3078 == 'a=0x'
+        if (len < 44) return (address(0x0), false);
+        return hexToAddress(str, idx + 4);
+    }
+
+    function hexToAddress(bytes memory str, uint idx) internal pure returns (address, bool) {
+        if (str.length - idx < 40) return (address(0x0), false);
+        uint ret = 0;
+        for (uint i = idx; i < idx + 40; i++) {
+            ret <<= 4;
+            uint x = str.readUint8(i);
+            if (x >= 48 && x < 58) {
+                ret |= x - 48;
+            } else if (x >= 65 && x < 71) {
+                ret |= x - 55;
+            } else if (x >= 97 && x < 103) {
+                ret |= x - 87;
+            } else {
+                return (address(0x0), false);
+            }
+        }
+        return (address(uint160(ret)), true);
+    }
+}