refactor!: remove LSP0Utils.sol in favour of moving the functions inside LSP1Utils.sol

contracts/LSP1UniversalReceiver/LSP1Utils.sol

@@ -6,10 +6,17 @@ import {Address} from "@openzeppelin/contracts/utils/Address.sol";
 import {
     ERC165Checker
 } from "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
+import {LSP2Utils} from "../LSP2ERC725YJSONSchema/LSP2Utils.sol";
 
 // constants
 import "./ILSP1UniversalReceiver.sol";
-import {_INTERFACEID_LSP1} from "../LSP1UniversalReceiver/LSP1Constants.sol";
+
+// constants
+import {
+    _INTERFACEID_LSP1,
+    _LSP1_UNIVERSAL_RECEIVER_DELEGATE_KEY,
+    _LSP1_UNIVERSAL_RECEIVER_DELEGATE_PREFIX
+} from "../LSP1UniversalReceiver/LSP1Constants.sol";
 import "../LSP0ERC725Account/LSP0Constants.sol";
 import "../LSP5ReceivedAssets/LSP5Constants.sol";
 import "../LSP7DigitalAsset/LSP7Constants.sol";
@@ -92,6 +99,42 @@ library LSP1Utils {
         return result.length != 0 ? abi.decode(result, (bytes)) : result;
     }
 
+    /**
+     * @notice Retrieving the value stored under the ERC725Y data key `LSP1UniversalReceiverDelegate`.
+     *
+     * @dev Query internally the ERC725Y storage of a `ERC725Y` smart contract to retrieve
+     * the value set under the `LSP1UniversalReceiverDelegate` data key.
+     *
+     * @param erc725YStorage A reference to the ERC725Y storage mapping of the contract.
+     * @return The bytes value stored under the `LSP1UniversalReceiverDelegate` data key.
+     */
+    function getLSP1DelegateValue(
+        mapping(bytes32 => bytes) storage erc725YStorage
+    ) internal view returns (bytes memory) {
+        return erc725YStorage[_LSP1_UNIVERSAL_RECEIVER_DELEGATE_KEY];
+    }
+
+    /**
+     * @notice Retrieving the value stored under the ERC725Y data key `LSP1UniversalReceiverDelegate:<type-id>` for a specific `typeId`.
+     *
+     * @dev Query internally the ERC725Y storage of a `ERC725Y` smart contract to retrieve
+     * the value set under the `LSP1UniversalReceiverDelegate:<bytes32>` data key for a specific LSP1 `typeId`.
+     *
+     * @param erc725YStorage A reference to the ERC725Y storage mapping of the contract.
+     * @param typeId A bytes32 LSP1 `typeId`;
+     * @return The bytes value stored under the `LSP1UniversalReceiverDelegate:<bytes32>` data key.
+     */
+    function getLSP1DelegateValueForTypeId(
+        mapping(bytes32 => bytes) storage erc725YStorage,
+        bytes32 typeId
+    ) internal view returns (bytes memory) {
+        bytes32 lsp1TypeIdDataKey = LSP2Utils.generateMappingKey(
+            _LSP1_UNIVERSAL_RECEIVER_DELEGATE_PREFIX,
+            bytes20(typeId)
+        );
+        return erc725YStorage[lsp1TypeIdDataKey];
+    }
+
     /**
      * @dev Gets all the transfer details based on the provided `bytes32 typeId`.
      *

docs/libraries/LSP1UniversalReceiver/LSP1Utils.md

@@ -80,6 +80,62 @@ as additional informations in the calldata.
 
 <br/>
 
+### getLSP1DelegateValue
+
+```solidity
+function getLSP1DelegateValue(
+  mapping(bytes32 => bytes) erc725YStorage
+) internal view returns (bytes);
+```
+
+_Retrieving the value stored under the ERC725Y data key `LSP1UniversalReceiverDelegate`._
+
+Query internally the ERC725Y storage of a `ERC725Y` smart contract to retrieve
+the value set under the `LSP1UniversalReceiverDelegate` data key.
+
+#### Parameters
+
+| Name             |            Type             | Description                                                 |
+| ---------------- | :-------------------------: | ----------------------------------------------------------- |
+| `erc725YStorage` | `mapping(bytes32 => bytes)` | A reference to the ERC725Y storage mapping of the contract. |
+
+#### Returns
+
+| Name |  Type   | Description                                                                |
+| ---- | :-----: | -------------------------------------------------------------------------- |
+| `0`  | `bytes` | The bytes value stored under the `LSP1UniversalReceiverDelegate` data key. |
+
+<br/>
+
+### getLSP1DelegateValueForTypeId
+
+```solidity
+function getLSP1DelegateValueForTypeId(
+  mapping(bytes32 => bytes) erc725YStorage,
+  bytes32 typeId
+) internal view returns (bytes);
+```
+
+_Retrieving the value stored under the ERC725Y data key `LSP1UniversalReceiverDelegate:<type-id>` for a specific `typeId`._
+
+Query internally the ERC725Y storage of a `ERC725Y` smart contract to retrieve
+the value set under the `LSP1UniversalReceiverDelegate:<bytes32>` data key for a specific LSP1 `typeId`.
+
+#### Parameters
+
+| Name             |            Type             | Description                                                 |
+| ---------------- | :-------------------------: | ----------------------------------------------------------- |
+| `erc725YStorage` | `mapping(bytes32 => bytes)` | A reference to the ERC725Y storage mapping of the contract. |
+| `typeId`         |          `bytes32`          | A bytes32 LSP1 `typeId`;                                    |
+
+#### Returns
+
+| Name |  Type   | Description                                                                          |
+| ---- | :-----: | ------------------------------------------------------------------------------------ |
+| `0`  | `bytes` | The bytes value stored under the `LSP1UniversalReceiverDelegate:<bytes32>` data key. |
+
+<br/>
+
 ### getTransferDetails
 
 ```solidity

dodoc/config.ts

@@ -36,7 +36,6 @@ export const dodocConfig = {
     'contracts/LSP8IdentifiableDigitalAsset/presets/LSP8Mintable.sol',
 
     // libraries --------------------
-    'contracts/LSP0ERC725Account/LSP0Utils.sol',
     'contracts/LSP1UniversalReceiver/LSP1Utils.sol',
     'contracts/LSP2ERC725YJSONSchema/LSP2Utils.sol',
     'contracts/LSP5ReceivedAssets/LSP5Utils.sol',
@@ -48,7 +47,6 @@ export const dodocConfig = {
     '@erc725/smart-contracts/contracts/ERC725.sol',
   ],
   libraries: [
-    'contracts/LSP0ERC725Account/LSP0Utils.sol',
     'contracts/LSP1UniversalReceiver/LSP1Utils.sol',
     'contracts/LSP2ERC725YJSONSchema/LSP2Utils.sol',
     'contracts/LSP5ReceivedAssets/LSP5Utils.sol',