diff --git a/contracts/ENS.sol b/contracts/ENS.sol
deleted file mode 100644
index 725daee..0000000
--- a/contracts/ENS.sol
+++ /dev/null
@@ -1,48 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
-
-interface ENS {
-  // Logged when the owner of a node assigns a new owner to a subnode.
-  event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
-
-  // Logged when the owner of a node transfers ownership to a new account.
-  event Transfer(bytes32 indexed node, address owner);
-
-  // Logged when the resolver for a node changes.
-  event NewResolver(bytes32 indexed node, address resolver);
-
-  // Logged when the TTL of a node changes
-  event NewTTL(bytes32 indexed node, uint64 ttl);
-
-  function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
-
-  function setSubnodeRecord(
-      bytes32 node,
-      bytes32 label,
-      address owner,
-      address resolver,
-      uint64 ttl
-  ) external;
-
-  function setSubnodeOwner(
-    bytes32 _node,
-    bytes32 _label,
-    address _owner
-  ) external returns (bytes32);
-
-  function setResolver(bytes32 _node, address _resolver) external;
-
-  function setOwner(bytes32 _node, address _owner) external;
-
-  function setTTL(bytes32 _node, uint64 _ttl) external;
-
-  function owner(bytes32 _node) external view returns (address);
-
-  function resolver(bytes32 _node) external view returns (address);
-
-  function ttl(bytes32 _node) external view returns (uint64);
-
-  function recordExists(bytes32 node) external virtual view returns (bool);
-
-  function isApprovedForAll(address owner, address operator) external virtual view returns (bool);
-}
diff --git a/contracts/ENSRegistry.sol b/contracts/ENSRegistry.sol
deleted file mode 100644
index 5b3148e..0000000
--- a/contracts/ENSRegistry.sol
+++ /dev/null
@@ -1,161 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
-
-import "./ENS.sol";
-
-/**
- * The ENS registry contract.
- */
-contract ENSRegistry is ENS {
-  struct Record {
-    address owner;
-    address resolver;
-    uint64 ttl;
-  }
-
-  mapping(bytes32 => Record) private records;
-
-  // Permits modifications only by the owner of the specified node.
-  modifier only_owner(bytes32 _node) {
-    require(records[_node].owner == msg.sender, "Owner is not sender");
-    _;
-  }
-
-  /**
-   * @dev Constructs a new ENS registrar.
-   */
-  constructor() {
-    records[0x0].owner = msg.sender;
-  }
-
-
-  /**
-    * @dev Sets the record for a node.
-    * @param _node The node to update.
-    * @param _owner The address of the new owner.
-    * @param _resolver The address of the resolver.
-    * @param _ttl The TTL in seconds.
-    */
-  function setRecord(bytes32 _node, address _owner, address _resolver, uint64 _ttl) external override {
-      setOwner(_node, _owner);
-      _setResolverAndTTL(_node, _resolver, _ttl);
-  }
-  
-  /**
-   * @dev Transfers ownership of a node to a new address. May only be called by the current owner of the node.
-   * @param _node The node to transfer ownership of.
-   * @param _owner The address of the new owner.
-   */
-  function setOwner(bytes32 _node, address _owner) public override only_owner(_node) {
-    emit Transfer(_node, _owner);
-    records[_node].owner = _owner;
-  }
-
-  /***
-    * @dev Sets the record for a subnode.
-    * @param node The parent node.
-    * @param label The hash of the label specifying the subnode.
-    * @param owner The address of the new owner.
-    * @param resolver The address of the resolver.
-    * @param ttl The TTL in seconds.
-    */
-  function setSubnodeRecord(bytes32 _node, bytes32 _label, address _owner, address _resolver, uint64 _ttl) 
-  external override {
-      bytes32 subnode = setSubnodeOwner(_node, _label, _owner);
-      _setResolverAndTTL(subnode, _resolver, _ttl);
-  }
-  /**
-   * @dev Transfers ownership of a subnode keccak256(node, label) to a new address. May only be called by the owner of the parent node.
-   * @param _node The parent node.
-   * @param _label The hash of the label specifying the subnode.
-   * @param _owner The address of the new owner.
-   */
-  function setSubnodeOwner(
-    bytes32 _node,
-    bytes32 _label,
-    address _owner
-  ) public override only_owner(_node) returns(bytes32) {
-    bytes32 subnode = keccak256(abi.encodePacked(_node, _label));
-    emit NewOwner(_node, _label, _owner);
-    records[subnode].owner = _owner;
-    return subnode;
-  }
-
-  /**
-   * @dev Sets the resolver address for the specified node.
-   * @param _node The node to update.
-   * @param _resolver The address of the resolver.
-   */
-  function setResolver(bytes32 _node, address _resolver) external override only_owner(_node) {
-    emit NewResolver(_node, _resolver);
-    records[_node].resolver = _resolver;
-  }
-
-  /**
-   * @dev Sets the TTL for the specified node.
-   * @param _node The node to update.
-   * @param _ttl The TTL in seconds.
-   */
-  function setTTL(bytes32 _node, uint64 _ttl) external override only_owner(_node) {
-    emit NewTTL(_node, _ttl);
-    records[_node].ttl = _ttl;
-  }
-
-  /**
-   * @dev Returns the address that owns the specified node.
-   * @param _node The specified node.
-   * @return address of the owner.
-   */
-  function owner(bytes32 _node) external view override returns (address) {
-    return records[_node].owner;
-  }
-
-  /**
-   * @dev Returns the address of the resolver for the specified node.
-   * @param _node The specified node.
-   * @return address of the resolver.
-   */
-  function resolver(bytes32 _node) external view override returns (address) {
-    return records[_node].resolver;
-  }
-
-  /**
-   * @dev Returns the TTL of a node, and any records associated with it.
-   * @param _node The specified node.
-   * @return ttl of the node.
-   */
-  function ttl(bytes32 _node) external view override returns (uint64) {
-    return records[_node].ttl;
-  }
-
-  /**
-    * @dev Returns whether a record has been imported to the registry.
-    * @param _node The specified node.
-    * @return Bool if record exists
-    */
-  function recordExists(bytes32 _node) public override view returns (bool) {
-      return records[_node].owner != address(0x0);
-  }
-
-  /**
-    * @dev Query if an address is an authorized operator for another address.
-    * @param _owner The address that owns the records.
-    * @param _operator The address that acts on behalf of the owner.
-    * @return True if `operator` is an approved operator for `owner`, false otherwise.
-    */
-  function isApprovedForAll(address _owner, address _operator) external override view returns (bool) {
-      return false;
-  }
-  
-  function _setResolverAndTTL(bytes32 node, address resolver, uint64 ttl) internal {
-      if(resolver != records[node].resolver) {
-          records[node].resolver = resolver;
-          emit NewResolver(node, resolver);
-      }
-
-      if(ttl != records[node].ttl) {
-          records[node].ttl = ttl;
-          emit NewTTL(node, ttl);
-      }
-  }
-}
diff --git a/contracts/FDSRegistrar.sol b/contracts/FDSRegistrar.sol
index b399537..0e7e1bb 100644
--- a/contracts/FDSRegistrar.sol
+++ b/contracts/FDSRegistrar.sol
@@ -8,12 +8,17 @@ import "@ensdomains/ens-contracts/contracts/ethregistrar/BaseRegistrarImplementa
  * The ENS registry contract.
  */
 contract FDSRegistrar is BaseRegistrarImplementation {
-  bytes32 constant NAME_HASH = 0x854683790d7d8c6e4d741a8a5f01dc2952c51f38407545ea5117889dc81bd141;
+  bytes32 constant ZERO_HASH = 0x0000000000000000000000000000000000000000000000000000000000000000;
+  
+  // from specification https://eips.ethereum.org/EIPS/eip-137
+  bytes32 constant NAME_HASH = keccak256(abi.encodePacked(ZERO_HASH, keccak256(abi.encodePacked("fds"))));
+  // 0x854683790d7d8c6e4d741a8a5f01dc2952c51f38407545ea5117889dc81bd141;
+
   /**
    * @dev Constructs a new ENS registrar.
    */
   constructor(ENS _registry) 
-  BaseRegistrarImplementation(_registry, NAME_HASH) {
+    BaseRegistrarImplementation(_registry, NAME_HASH) {
   }
 
 
diff --git a/contracts/FDSRegistry.sol b/contracts/FDSRegistry.sol
new file mode 100644
index 0000000..d63c2cd
--- /dev/null
+++ b/contracts/FDSRegistry.sol
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "@ensdomains/ens-contracts/contracts/registry/ENSRegistry.sol";
+
+/**
+ * The FDS registry contract.
+ */
+contract FDSRegistry is ENSRegistry {
+  
+  /**
+   * @dev Constructs a new registry
+   */
+  constructor() 
+    ENSRegistry() {
+  }
+}
diff --git a/contracts/PublicResolver.sol b/contracts/PublicResolver.sol
index 4a9a74f..d374836 100644
--- a/contracts/PublicResolver.sol
+++ b/contracts/PublicResolver.sol
@@ -1,7 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
-import "./ENS.sol";
+import "@ensdomains/ens-contracts/contracts/registry/ENS.sol";
+
 
 /**
  * A simple resolver anyone can use; only allows the owner of a node to set its
diff --git a/contracts/SubdomainRegistrar.sol b/contracts/SubdomainRegistrar.sol
deleted file mode 100644
index fa0ebb6..0000000
--- a/contracts/SubdomainRegistrar.sol
+++ /dev/null
@@ -1,40 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
-
-import "./ENS.sol";
-
-/**
- * A registrar that allocates subdomains to the first person to claim them, but
- * expires registrations a fixed period after they're initially claimed.
- */
-contract SubdomainRegistrar {
-  uint256 constant private REGISTRATION_PERIOD = 520 weeks;
-
-  ENS public ens;
-  bytes32 public rootNode;
-  mapping(bytes32 => uint256) public expiryTimes;
-
-  event Log(address owner, bytes32 label);
-
-  /**
-   * Constructor.
-   * @param _ensAddr The address of the ENS registry.
-   * @param _node The node that this registrar administers.
-   */
-  constructor(ENS _ensAddr, bytes32 _node) {
-    ens = _ensAddr;
-    rootNode = _node;
-  }
-
-  /**
-   * Register a name that's not currently registered
-   * @param _label The hash of the label to register.
-   * @param _owner The address of the new owner.
-   */
-  function register(bytes32 _label, address _owner) public {
-    require(expiryTimes[_label] < block.timestamp, "Block expired");
-
-    expiryTimes[_label] = block.timestamp + REGISTRATION_PERIOD;
-    ens.setSubnodeOwner(rootNode, _label, _owner);
-  }
-}
diff --git a/package-lock.json b/package-lock.json
index 5ce0552..3bf8340 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,14 +9,10 @@
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
-        "@ensdomains/buffer": "^0.0.13",
-        "@ensdomains/ens-contracts": "^0.0.11",
-        "@ensdomains/solsha1": "0.0.3",
-        "@openzeppelin/contracts": "^4.1.0",
-        "bee-factory": "github:ethersphere/bee-factory",
-        "dns-packet": "^5.3.1"
+        "bee-factory": "github:ethersphere/bee-factory"
       },
       "devDependencies": {
+        "@ensdomains/ens-contracts": "^0.0.11",
         "@fairdatasociety/bmt-js": "^2.0.1",
         "@nomiclabs/hardhat-ethers": "^2.0.4",
         "@nomiclabs/hardhat-etherscan": "^2.1.8",
@@ -182,6 +178,7 @@
       "version": "0.1.9",
       "resolved": "https://registry.npmjs.org/@ensdomains/address-encoder/-/address-encoder-0.1.9.tgz",
       "integrity": "sha512-E2d2gP4uxJQnDu2Kfg1tHNspefzbLT8Tyjrm5sEuim32UkU2sm5xL4VXtgc2X33fmPEw9+jUMpGs4veMbf+PYg==",
+      "dev": true,
       "dependencies": {
         "bech32": "^1.1.3",
         "blakejs": "^1.1.0",
@@ -195,12 +192,14 @@
     "node_modules/@ensdomains/address-encoder/node_modules/bn.js": {
       "version": "4.12.0",
       "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
-      "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+      "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+      "dev": true
     },
     "node_modules/@ensdomains/buffer": {
       "version": "0.0.13",
       "resolved": "https://registry.npmjs.org/@ensdomains/buffer/-/buffer-0.0.13.tgz",
       "integrity": "sha512-8aA+U/e4S54ebPwcge1HHvvpgXLKxPd6EOSegMlrTvBnKB8RwB3OpNyflaikD6KqzIwDaBaH8bvnTrMcfpV7oQ==",
+      "dev": true,
       "dependencies": {
         "@nomiclabs/hardhat-truffle5": "^2.0.0"
       }
@@ -210,6 +209,7 @@
       "resolved": "https://registry.npmjs.org/@ensdomains/ens/-/ens-0.4.5.tgz",
       "integrity": "sha512-JSvpj1iNMFjK6K+uVl4unqMoa9rf5jopb8cya5UGBWz23Nw8hSNT7efgUx4BTlAPAgpNlEioUfeTyQ6J9ZvTVw==",
       "deprecated": "Please use @ensdomains/ens-contracts",
+      "dev": true,
       "dependencies": {
         "bluebird": "^3.5.2",
         "eth-ens-namehash": "^2.0.8",
@@ -222,6 +222,7 @@
       "version": "0.0.11",
       "resolved": "https://registry.npmjs.org/@ensdomains/ens-contracts/-/ens-contracts-0.0.11.tgz",
       "integrity": "sha512-b74OlFcds9eyHy26uE2fGcM+ZCSFtPeRGVbUYWq3NRlf+9t8TIgPwF3rCNwpAFQG0B/AHb4C4hYX2BBJYR1zPg==",
+      "dev": true,
       "dependencies": {
         "@ensdomains/buffer": "^0.0.13",
         "@ensdomains/solsha1": "0.0.3",
@@ -233,6 +234,7 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
       "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -241,6 +243,7 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
       "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
+      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -249,6 +252,7 @@
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
       "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
+      "dev": true,
       "dependencies": {
         "string-width": "^1.0.1",
         "strip-ansi": "^3.0.1",
@@ -259,6 +263,7 @@
       "version": "0.30.0",
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-0.30.0.tgz",
       "integrity": "sha1-8jP/zAjU2n1DLapEl3aYnbHfk/A=",
+      "dev": true,
       "dependencies": {
         "graceful-fs": "^4.1.2",
         "jsonfile": "^2.1.0",
@@ -270,12 +275,14 @@
     "node_modules/@ensdomains/ens/node_modules/get-caller-file": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.3.tgz",
-      "integrity": "sha512-3t6rVToeoZfYSGd8YoLFR2DJkiQrIiUrGcjvFX2mDw3bn6k2OtwHN0TNCLbBO+w8qTvimhDkv+LSscbJY1vE6w=="
+      "integrity": "sha512-3t6rVToeoZfYSGd8YoLFR2DJkiQrIiUrGcjvFX2mDw3bn6k2OtwHN0TNCLbBO+w8qTvimhDkv+LSscbJY1vE6w==",
+      "dev": true
     },
     "node_modules/@ensdomains/ens/node_modules/is-fullwidth-code-point": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
       "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+      "dev": true,
       "dependencies": {
         "number-is-nan": "^1.0.0"
       },
@@ -287,6 +294,7 @@
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-2.4.0.tgz",
       "integrity": "sha1-NzaitCi4e72gzIO1P6PWM6NcKug=",
+      "dev": true,
       "optionalDependencies": {
         "graceful-fs": "^4.1.6"
       }
@@ -295,6 +303,7 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-1.2.1.tgz",
       "integrity": "sha1-UpyczvJzgK3+yaL5ZbZJu+5jZBg=",
+      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -302,12 +311,14 @@
     "node_modules/@ensdomains/ens/node_modules/require-main-filename": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-1.0.1.tgz",
-      "integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE="
+      "integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=",
+      "dev": true
     },
     "node_modules/@ensdomains/ens/node_modules/semver": {
       "version": "5.7.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
       "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+      "dev": true,
       "bin": {
         "semver": "bin/semver"
       }
@@ -316,6 +327,7 @@
       "version": "0.4.26",
       "resolved": "https://registry.npmjs.org/solc/-/solc-0.4.26.tgz",
       "integrity": "sha512-o+c6FpkiHd+HPjmjEVpQgH7fqZ14tJpXhho+/bQXlXbliLIS/xjXb42Vxh+qQY1WCSTMQ0+a5vR9vi0MfhU6mA==",
+      "dev": true,
       "dependencies": {
         "fs-extra": "^0.30.0",
         "memorystream": "^0.3.1",
@@ -331,6 +343,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
       "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+      "dev": true,
       "dependencies": {
         "code-point-at": "^1.0.0",
         "is-fullwidth-code-point": "^1.0.0",
@@ -344,6 +357,7 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^2.0.0"
       },
@@ -354,12 +368,14 @@
     "node_modules/@ensdomains/ens/node_modules/which-module": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz",
-      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8="
+      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8=",
+      "dev": true
     },
     "node_modules/@ensdomains/ens/node_modules/wrap-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "dev": true,
       "dependencies": {
         "string-width": "^1.0.1",
         "strip-ansi": "^3.0.1"
@@ -371,12 +387,14 @@
     "node_modules/@ensdomains/ens/node_modules/y18n": {
       "version": "3.2.2",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
-      "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ=="
+      "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==",
+      "dev": true
     },
     "node_modules/@ensdomains/ens/node_modules/yargs": {
       "version": "4.8.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
       "integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
+      "dev": true,
       "dependencies": {
         "cliui": "^3.2.0",
         "decamelize": "^1.1.1",
@@ -398,6 +416,7 @@
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-2.4.1.tgz",
       "integrity": "sha1-hVaN488VD/SfpRgl8DqMiA3cxcQ=",
+      "dev": true,
       "dependencies": {
         "camelcase": "^3.0.0",
         "lodash.assign": "^4.0.6"
@@ -407,6 +426,7 @@
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/@ensdomains/ensjs/-/ensjs-2.1.0.tgz",
       "integrity": "sha512-GRbGPT8Z/OJMDuxs75U/jUNEC0tbL0aj7/L/QQznGYKm/tiasp+ndLOaoULy9kKJFC0TBByqfFliEHDgoLhyog==",
+      "dev": true,
       "dependencies": {
         "@babel/runtime": "^7.4.4",
         "@ensdomains/address-encoder": "^0.1.7",
@@ -422,12 +442,14 @@
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/@ensdomains/resolver/-/resolver-0.2.4.tgz",
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       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.21.3.tgz",
-      "integrity": "sha512-t0rzBq87m3fVcduHDUFhKmyyX+9eo6WQjZvf51Ea/M0Q7+T374Jp1aUiyUl0GKxp8M/OETVHSDvmkyPgvX+X2w=="
+      "integrity": "sha512-t0rzBq87m3fVcduHDUFhKmyyX+9eo6WQjZvf51Ea/M0Q7+T374Jp1aUiyUl0GKxp8M/OETVHSDvmkyPgvX+X2w==",
+      "dev": true
     },
     "type-is": {
       "version": "1.6.18",
@@ -55059,7 +55598,8 @@
     "underscore": {
       "version": "1.13.4",
       "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.4.tgz",
-      "integrity": "sha512-BQFnUDuAQ4Yf/cYY5LNrK9NCJFKriaRbD9uR1fTeXnBeoa97W0i41qkZfGO9pSo8I5KzjAcSY2XYtdf0oKd7KQ=="
+      "integrity": "sha512-BQFnUDuAQ4Yf/cYY5LNrK9NCJFKriaRbD9uR1fTeXnBeoa97W0i41qkZfGO9pSo8I5KzjAcSY2XYtdf0oKd7KQ==",
+      "dev": true
     },
     "universalify": {
       "version": "0.1.2",
@@ -55183,7 +55723,8 @@
     "uuid": {
       "version": "8.3.2",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
-      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
+      "devOptional": true
     },
     "v8-compile-cache": {
       "version": "2.3.0",
@@ -55195,6 +55736,7 @@
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
       "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "dev": true,
       "requires": {
         "spdx-correct": "^3.0.0",
         "spdx-expression-parse": "^3.0.0"
@@ -55898,6 +56440,7 @@
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.6.1.tgz",
       "integrity": "sha512-RidGKv5kOkcerI6jQqDFDoTllQQqV+rPhTzZHhmbqtFObbYpU93uc+yG1LHivRTQhA6llIx67iudc/vzisgO+w==",
+      "dev": true,
       "requires": {
         "bn.js": "^4.11.9",
         "ethereum-bloom-filters": "^1.0.6",
@@ -55911,14 +56454,16 @@
         "bn.js": {
           "version": "4.12.0",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
-          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+          "dev": true
         }
       }
     },
     "webidl-conversions": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
-      "integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE="
+      "integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=",
+      "devOptional": true
     },
     "websocket": {
       "version": "1.0.34",
@@ -55965,6 +56510,7 @@
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
       "integrity": "sha1-lmRU6HZUYuN2RNNib2dCzotwll0=",
+      "devOptional": true,
       "requires": {
         "tr46": "~0.0.3",
         "webidl-conversions": "^3.0.0"
@@ -55983,6 +56529,7 @@
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
       "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
       "requires": {
         "isexe": "^2.0.0"
       }
@@ -56037,7 +56584,8 @@
     "window-size": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.2.0.tgz",
-      "integrity": "sha1-tDFbtCFKPXBY6+7okuE/ok2YsHU="
+      "integrity": "sha1-tDFbtCFKPXBY6+7okuE/ok2YsHU=",
+      "dev": true
     },
     "word-wrap": {
       "version": "1.2.3",
@@ -56178,7 +56726,8 @@
     "xmlhttprequest": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
-      "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw="
+      "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw=",
+      "devOptional": true
     },
     "xss": {
       "version": "1.0.11",
@@ -56311,6 +56860,7 @@
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
       "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "dev": true,
       "requires": {
         "flat": "^4.1.0",
         "lodash": "^4.17.15",
diff --git a/package.json b/package.json
index 0232162..a1bbaaa 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
   },
   "homepage": "https://github.com/fairDataSociety/fdp-contracts#readme",
   "devDependencies": {
+    "@ensdomains/ens-contracts": "^0.0.11",
     "@fairdatasociety/bmt-js": "^2.0.1",
     "@nomiclabs/hardhat-ethers": "^2.0.4",
     "@nomiclabs/hardhat-etherscan": "^2.1.8",
@@ -61,11 +62,6 @@
     "typescript": "^4.5.4"
   },
   "dependencies": {
-    "@ensdomains/buffer": "^0.0.13",
-    "@ensdomains/ens-contracts": "^0.0.11",
-    "@ensdomains/solsha1": "0.0.3",
-    "@openzeppelin/contracts": "^4.1.0",
-    "bee-factory": "github:ethersphere/bee-factory",
-    "dns-packet": "^5.3.1"
+    "bee-factory": "github:ethersphere/bee-factory"
   }
 }
diff --git a/test/FDSRegistrar.ts b/test/FDSRegistrar.ts
index 66d211c..fd36c95 100644
--- a/test/FDSRegistrar.ts
+++ b/test/FDSRegistrar.ts
@@ -1,12 +1,12 @@
 import { SignerWithAddress } from '@nomiclabs/hardhat-ethers/signers'
 import { expect } from 'chai'
 import { ethers } from 'hardhat'
-import { FDSRegistrar, ENSRegistry } from '../typechain'
+import { FDSRegistrar, FDSRegistry } from '../typechain'
 
 const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000'
 const ZERO_HASH = '0x0000000000000000000000000000000000000000000000000000000000000000'
 
-function sha3(value: string) {
+function keccak256FromUtf8Bytes(value: string) {
   return ethers.utils.keccak256(ethers.utils.toUtf8Bytes(value))
 }
 
@@ -14,18 +14,13 @@ const advanceTime = (delay: number) => ethers.provider.send('evm_increaseTime',
 
 const mine = () => ethers.provider.send('evm_mine', [])
 
-module.exports = {
-  advanceTime,
-  mine,
-}
-
 describe('FDSRegistrar', () => {
   let ownerAccount: SignerWithAddress
   let controllerAccount: SignerWithAddress
   let registrantAccount: SignerWithAddress
   let otherAccount: SignerWithAddress
 
-  let ens: ENSRegistry
+  let ens: FDSRegistry
   let registrar: FDSRegistrar
 
   before(async () => {
@@ -34,45 +29,51 @@ describe('FDSRegistrar', () => {
     controllerAccount = signers[1]
     registrantAccount = signers[2]
     otherAccount = signers[3]
-    const ENS = await ethers.getContractFactory('ENSRegistry')
+    const ENS = await ethers.getContractFactory('FDSRegistry')
     ens = await ENS.deploy()
     await ens.deployed()
     const FDSRegistrar = await ethers.getContractFactory('FDSRegistrar')
     registrar = await FDSRegistrar.deploy(ens.address)
     await registrar.addController(controllerAccount.address)
-    await ens.setSubnodeOwner(ZERO_HASH, sha3('fds'), registrar.address)
+    await ens.setSubnodeOwner(ZERO_HASH, keccak256FromUtf8Bytes('fds'), registrar.address)
   })
 
   it('should allow new registrations', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
-    await controllerAccountReg.register(sha3('newname'), registrantAccount.address, 86400)
+    await controllerAccountReg.register(keccak256FromUtf8Bytes('newname'), registrantAccount.address, 86400)
     const block = await ethers.provider.getBlock('latest')
     expect(await ens.owner(ethers.utils.namehash('newname.fds'))).equal(registrantAccount.address)
-    expect(await registrar.ownerOf(sha3('newname'))).equal(registrantAccount.address)
-    expect((await registrar.nameExpires(sha3('newname'))).toNumber()).equal(block.timestamp + 86400)
+    expect(await registrar.ownerOf(keccak256FromUtf8Bytes('newname'))).equal(registrantAccount.address)
+    expect((await registrar.nameExpires(keccak256FromUtf8Bytes('newname'))).toNumber()).equal(block.timestamp + 86400)
   })
 
   it('should allow registrations without updating the registry', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
-    await controllerAccountReg.registerOnly(sha3('silentname'), registrantAccount.address, 86400)
+    await controllerAccountReg.registerOnly(keccak256FromUtf8Bytes('silentname'), registrantAccount.address, 86400)
     const block = await ethers.provider.getBlock('latest')
     expect(await ens.owner(ethers.utils.namehash('silentname.fds'))).equal(ZERO_ADDRESS)
-    expect(await registrar.ownerOf(sha3('silentname'))).equal(registrantAccount.address)
-    expect((await registrar.nameExpires(sha3('silentname'))).toNumber()).equal(block.timestamp + 86400)
+    expect(await registrar.ownerOf(keccak256FromUtf8Bytes('silentname'))).equal(registrantAccount.address)
+    expect((await registrar.nameExpires(keccak256FromUtf8Bytes('silentname'))).toNumber()).equal(
+      block.timestamp + 86400,
+    )
   })
 
   it('should allow renewals', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
-    const oldExpires = await registrar.nameExpires(sha3('newname'))
-    await controllerAccountReg.renew(sha3('newname'), 86400)
-    expect((await registrar.nameExpires(sha3('newname'))).toNumber()).equal(oldExpires.add(86400).toNumber())
+    const oldExpires = await registrar.nameExpires(keccak256FromUtf8Bytes('newname'))
+    await controllerAccountReg.renew(keccak256FromUtf8Bytes('newname'), 86400)
+    expect((await registrar.nameExpires(keccak256FromUtf8Bytes('newname'))).toNumber()).equal(
+      oldExpires.add(86400).toNumber(),
+    )
   })
 
   it('should only allow the controller to register', async () => {
     const otherAccountReg = registrar.connect(otherAccount)
 
     try {
-      await otherAccountReg.register(sha3('foo'), otherAccount.address, 86400, { from: otherAccount.address })
+      await otherAccountReg.register(keccak256FromUtf8Bytes('foo'), otherAccount.address, 86400, {
+        from: otherAccount.address,
+      })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
@@ -82,7 +83,7 @@ describe('FDSRegistrar', () => {
     const otherAccountReg = registrar.connect(otherAccount)
 
     try {
-      await otherAccountReg.renew(sha3('newname'), 86400, { from: otherAccount.address })
+      await otherAccountReg.renew(keccak256FromUtf8Bytes('newname'), 86400, { from: otherAccount.address })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
@@ -91,33 +92,33 @@ describe('FDSRegistrar', () => {
   it('should not permit registration of already registered names', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
     try {
-      await controllerAccountReg.register(sha3('newname'), otherAccount.address, 86400, {
+      await controllerAccountReg.register(keccak256FromUtf8Bytes('newname'), otherAccount.address, 86400, {
         from: controllerAccount.address,
       })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
 
-    expect(await registrar.ownerOf(sha3('newname')), registrantAccount.address)
+    expect(await registrar.ownerOf(keccak256FromUtf8Bytes('newname')), registrantAccount.address)
   })
 
   it('should not permit renewing a name that is not registered', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
 
     try {
-      await controllerAccountReg.renew(sha3('name3'), 86400, { from: controllerAccount.address })
+      await controllerAccountReg.renew(keccak256FromUtf8Bytes('name3'), 86400, { from: controllerAccount.address })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
   })
 
   it('should permit the owner to reclaim a name', async () => {
-    await ens.setSubnodeOwner(ZERO_HASH, sha3('fds'), ownerAccount.address)
-    await ens.setSubnodeOwner(ethers.utils.namehash('fds'), sha3('newname'), ZERO_ADDRESS)
+    await ens.setSubnodeOwner(ZERO_HASH, keccak256FromUtf8Bytes('fds'), ownerAccount.address)
+    await ens.setSubnodeOwner(ethers.utils.namehash('fds'), keccak256FromUtf8Bytes('newname'), ZERO_ADDRESS)
     expect(await ens.owner(ethers.utils.namehash('newname.fds')), ZERO_ADDRESS)
-    await ens.setSubnodeOwner(ZERO_HASH, sha3('fds'), registrar.address)
+    await ens.setSubnodeOwner(ZERO_HASH, keccak256FromUtf8Bytes('fds'), registrar.address)
     const reg = registrar.connect(registrantAccount)
-    await reg.reclaim(sha3('newname'), registrantAccount.address)
+    await reg.reclaim(keccak256FromUtf8Bytes('newname'), registrantAccount.address)
     expect(await ens.owner(ethers.utils.namehash('newname.fds')), registrantAccount.address)
   })
 
@@ -125,7 +126,9 @@ describe('FDSRegistrar', () => {
     const otherAccountReg = registrar.connect(otherAccount)
 
     try {
-      await otherAccountReg.reclaim(sha3('newname'), registrantAccount.address, { from: otherAccount.address })
+      await otherAccountReg.reclaim(keccak256FromUtf8Bytes('newname'), registrantAccount.address, {
+        from: otherAccount.address,
+      })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
@@ -133,21 +136,30 @@ describe('FDSRegistrar', () => {
 
   it('should permit the owner to transfer a registration', async () => {
     const reg = registrar.connect(registrantAccount)
-    await reg.transferFrom(registrantAccount.address, otherAccount.address, sha3('newname'))
-    expect(await registrar.ownerOf(sha3('newname')), otherAccount.address)
+    await reg.transferFrom(registrantAccount.address, otherAccount.address, keccak256FromUtf8Bytes('newname'))
+    expect(await registrar.ownerOf(keccak256FromUtf8Bytes('newname')), otherAccount.address)
     // Transfer does not update ENS without a call to reclaim.
     expect(await ens.owner(ethers.utils.namehash('newname.fds')), registrantAccount.address)
     const otherAccountReg = registrar.connect(otherAccount)
-    await otherAccountReg.transferFrom(otherAccount.address, registrantAccount.address, sha3('newname'))
+    await otherAccountReg.transferFrom(
+      otherAccount.address,
+      registrantAccount.address,
+      keccak256FromUtf8Bytes('newname'),
+    )
   })
 
   it('should prohibit anyone else from transferring a registration', async () => {
     const otherAccountReg = registrar.connect(otherAccount)
 
     try {
-      await otherAccountReg.transferFrom(otherAccount.address, otherAccount.address, sha3('newname'), {
-        from: otherAccount.address,
-      })
+      await otherAccountReg.transferFrom(
+        otherAccount.address,
+        otherAccount.address,
+        keccak256FromUtf8Bytes('newname'),
+        {
+          from: otherAccount.address,
+        },
+      )
     } catch (e: any) {
       expect(e.message).contain('ERC721: transfer caller is not owner nor approve')
     }
@@ -156,13 +168,13 @@ describe('FDSRegistrar', () => {
   it('should not permit transfer or reclaim during the grace period', async () => {
     // Advance to the grace period
     const ts = (await ethers.provider.getBlock('latest')).timestamp
-    await advanceTime((await registrar.nameExpires(sha3('newname'))).toNumber() - ts + 3600)
+    await advanceTime((await registrar.nameExpires(keccak256FromUtf8Bytes('newname'))).toNumber() - ts + 3600)
     await mine()
 
     const reg = registrar.connect(registrantAccount)
 
     try {
-      await reg.transferFrom(registrantAccount.address, otherAccount.address, sha3('newname'), {
+      await reg.transferFrom(registrantAccount.address, otherAccount.address, keccak256FromUtf8Bytes('newname'), {
         from: registrantAccount.address,
       })
     } catch (e: any) {
@@ -170,7 +182,9 @@ describe('FDSRegistrar', () => {
     }
 
     try {
-      await reg.reclaim(sha3('newname'), registrantAccount.address, { from: registrantAccount.address })
+      await reg.reclaim(keccak256FromUtf8Bytes('newname'), registrantAccount.address, {
+        from: registrantAccount.address,
+      })
     } catch (e: any) {
       expect(e.message).contain('Transaction reverted')
     }
@@ -178,24 +192,24 @@ describe('FDSRegistrar', () => {
 
   it('should allow renewal during the grace period', async () => {
     const controllerAccountReg = registrar.connect(controllerAccount)
-    await controllerAccountReg.renew(sha3('newname'), 86400)
+    await controllerAccountReg.renew(keccak256FromUtf8Bytes('newname'), 86400)
   })
 
   it('should allow registration of an expired domain', async () => {
     const ts = (await ethers.provider.getBlock('latest')).timestamp
-    const expires = await registrar.nameExpires(sha3('newname'))
+    const expires = await registrar.nameExpires(keccak256FromUtf8Bytes('newname'))
     const grace = await registrar.GRACE_PERIOD()
     await advanceTime(expires.toNumber() - ts + grace.toNumber() + 3600)
 
     try {
-      await registrar.ownerOf(sha3('newname'))
+      await registrar.ownerOf(keccak256FromUtf8Bytes('newname'))
     } catch (error) {}
 
     const controllerAccountReg = registrar.connect(controllerAccount)
-    await controllerAccountReg.register(sha3('newname'), otherAccount.address, 86400, {
+    await controllerAccountReg.register(keccak256FromUtf8Bytes('newname'), otherAccount.address, 86400, {
       from: controllerAccount.address,
     })
-    expect(await registrar.ownerOf(sha3('newname')), otherAccount.address)
+    expect(await registrar.ownerOf(keccak256FromUtf8Bytes('newname')), otherAccount.address)
   })
 
   it('should allow the owner to set a resolver address', async () => {