feat!: Add batchCalls(...) to LSP7 & LSP8

constants.ts

@@ -29,8 +29,8 @@ export const INTERFACE_IDS = {
   LSP1UniversalReceiver: '0x6bb56a14',
   LSP1UniversalReceiverDelegate: '0xa245bbda',
   LSP6KeyManager: '0x23f34c62',
-  LSP7DigitalAsset: '0xdaa746b7',
-  LSP8IdentifiableDigitalAsset: '0x30dc5278',
+  LSP7DigitalAsset: '0xb3c4928f',
+  LSP8IdentifiableDigitalAsset: '0x59bf8640',
   LSP9Vault: '0x28af17e6',
   LSP11BasicSocialRecovery: '0x049a28f1',
   LSP14Ownable2Step: '0x94be5999',

contracts/LSP7DigitalAsset/ILSP7DigitalAsset.sol

@@ -291,4 +291,15 @@ interface ILSP7DigitalAsset is IERC165, IERC725Y {
         bool[] memory force,
         bytes[] memory data
     ) external;
+
+    /**
+     * @notice Executing the following batch of abi-encoded function calls on the contract: `data`.
+     *
+     * @dev Allows a caller to batch different function calls in one call. Perform a `delegatecall` on self, to call different functions with preserving the context.
+     * @param data An array of ABI encoded function calls to be called on the contract.
+     * @return results An array of abi-encoded data returned by the functions executed.
+     */
+    function batchCalls(
+        bytes[] calldata data
+    ) external returns (bytes[] memory results);
 }

contracts/LSP7DigitalAsset/LSP7Constants.sol

@@ -2,7 +2,7 @@
 pragma solidity ^0.8.4;
 
 // --- ERC165 interface ids
-bytes4 constant _INTERFACEID_LSP7 = 0xdaa746b7;
+bytes4 constant _INTERFACEID_LSP7 = 0xb3c4928f;
 
 // --- Token Hooks
 

contracts/LSP7DigitalAsset/LSP7DigitalAssetCore.sol

@@ -30,7 +30,8 @@ import {
     LSP7CannotSendWithAddressZero,
     LSP7NotifyTokenReceiverContractMissingLSP1Interface,
     LSP7NotifyTokenReceiverIsEOA,
-    OperatorAllowanceCannotBeIncreasedFromZero
+    OperatorAllowanceCannotBeIncreasedFromZero,
+    LSP7BatchCallFailed
 } from "./LSP7Errors.sol";
 
 // constants
@@ -97,6 +98,45 @@ abstract contract LSP7DigitalAssetCore is ILSP7DigitalAsset {
         return _tokenOwnerBalances[tokenOwner];
     }
 
+    // --- General functionality
+
+    /**
+     * @inheritdoc ILSP7DigitalAsset
+     *
+     * @custom:info It's not possible to send value along the functions call due to the use of `delegatecall`.
+     */
+    function batchCalls(
+        bytes[] calldata data
+    ) public virtual override returns (bytes[] memory results) {
+        results = new bytes[](data.length);
+        for (uint256 i; i < data.length; ) {
+            (bool success, bytes memory result) = address(this).delegatecall(
+                data[i]
+            );
+
+            if (!success) {
+                // Look for revert reason and bubble it up if present
+                if (result.length != 0) {
+                    // The easiest way to bubble the revert reason is using memory via assembly
+                    // solhint-disable no-inline-assembly
+                    /// @solidity memory-safe-assembly
+                    assembly {
+                        let returndata_size := mload(result)
+                        revert(add(32, result), returndata_size)
+                    }
+                } else {
+                    revert LSP7BatchCallFailed({callIndex: i});
+                }
+            }
+
+            results[i] = result;
+
+            unchecked {
+                ++i;
+            }
+        }
+    }
+
     // --- Operator functionality
 
     /**
@@ -392,7 +432,14 @@ abstract contract LSP7DigitalAssetCore is ILSP7DigitalAsset {
 
         _tokenOwnerBalances[to] += amount;
 
-        emit Transfer(msg.sender, address(0), to, amount, force, data);
+        emit Transfer({
+            operator: msg.sender,
+            from: address(0),
+            to: to,
+            amount: amount,
+            force: force,
+            data: data
+        });
 
         _afterTokenTransfer(address(0), to, amount, data);
 
@@ -452,7 +499,6 @@ abstract contract LSP7DigitalAssetCore is ILSP7DigitalAsset {
 
         _tokenOwnerBalances[from] -= amount;
 
-        emit Transfer(msg.sender, from, address(0), amount, false, data);
         emit Transfer({
             operator: msg.sender,
             from: from,
@@ -563,7 +609,14 @@ abstract contract LSP7DigitalAssetCore is ILSP7DigitalAsset {
         _tokenOwnerBalances[from] -= amount;
         _tokenOwnerBalances[to] += amount;
 
-        emit Transfer(msg.sender, from, to, amount, force, data);
+        emit Transfer({
+            operator: msg.sender,
+            from: from,
+            to: to,
+            amount: amount,
+            force: force,
+            data: data
+        });
 
         _afterTokenTransfer(from, to, amount, data);
 

contracts/LSP7DigitalAsset/LSP7Errors.sol

@@ -82,3 +82,9 @@ error LSP7TokenContractCannotHoldValue();
  * @dev Reverts when token owner call {increaseAllowance} for an operator that does not have any allowance
  */
 error OperatorAllowanceCannotBeIncreasedFromZero(address operator);
+
+/**
+ * @dev Reverts when a batch call failed.
+ * @notice Batch call failed.
+ */
+error LSP7BatchCallFailed(uint256 callIndex);

contracts/LSP8IdentifiableDigitalAsset/ILSP8IdentifiableDigitalAsset.sol

@@ -253,4 +253,15 @@ interface ILSP8IdentifiableDigitalAsset is IERC165, IERC725Y {
         bool[] memory force,
         bytes[] memory data
     ) external;
+
+    /**
+     * @notice Executing the following batch of abi-encoded function calls on the contract: `data`.
+     *
+     * @dev Allows a caller to batch different function calls in one call. Perform a `delegatecall` on self, to call different functions with preserving the context.
+     * @param data An array of ABI encoded function calls to be called on the contract.
+     * @return results An array of abi-encoded data returned by the functions executed.
+     */
+    function batchCalls(
+        bytes[] calldata data
+    ) external returns (bytes[] memory results);
 }

contracts/LSP8IdentifiableDigitalAsset/LSP8Constants.sol

@@ -2,7 +2,7 @@
 pragma solidity ^0.8.4;
 
 // --- ERC165 interface ids
-bytes4 constant _INTERFACEID_LSP8 = 0x30dc5278;
+bytes4 constant _INTERFACEID_LSP8 = 0x59bf8640;
 
 // --- ERC725Y Data Keys
 

contracts/LSP8IdentifiableDigitalAsset/LSP8Errors.sol

@@ -87,3 +87,9 @@ error LSP8TokenContractCannotHoldValue();
  * It can be set only once inside the constructor/initializer when the identifiable digital asset contract is being deployed.
  */
 error LSP8TokenIdTypeNotEditable();
+
+/**
+ * @dev Reverts when a batch call failed.
+ * @notice Batch call failed.
+ */
+error LSP8BatchCallFailed(uint256 callIndex);

contracts/LSP8IdentifiableDigitalAsset/LSP8IdentifiableDigitalAssetCore.sol

@@ -32,7 +32,8 @@ import {
     LSP8TokenIdAlreadyMinted,
     LSP8CannotSendToSelf,
     LSP8NotifyTokenReceiverContractMissingLSP1Interface,
-    LSP8NotifyTokenReceiverIsEOA
+    LSP8NotifyTokenReceiverIsEOA,
+    LSP8BatchCallFailed
 } from "./LSP8Errors.sol";
 
 // constants
@@ -113,6 +114,45 @@ abstract contract LSP8IdentifiableDigitalAssetCore is
         return _ownedTokens[tokenOwner].values();
     }
 
+    // --- General functionality
+
+    /**
+     * @inheritdoc ILSP8IdentifiableDigitalAsset
+     *
+     * @custom:info It's not possible to send value along the functions call due to the use of `delegatecall`.
+     */
+    function batchCalls(
+        bytes[] calldata data
+    ) public virtual override returns (bytes[] memory results) {
+        results = new bytes[](data.length);
+        for (uint256 i; i < data.length; ) {
+            (bool success, bytes memory result) = address(this).delegatecall(
+                data[i]
+            );
+
+            if (!success) {
+                // Look for revert reason and bubble it up if present
+                if (result.length != 0) {
+                    // The easiest way to bubble the revert reason is using memory via assembly
+                    // solhint-disable no-inline-assembly
+                    /// @solidity memory-safe-assembly
+                    assembly {
+                        let returndata_size := mload(result)
+                        revert(add(32, result), returndata_size)
+                    }
+                } else {
+                    revert LSP8BatchCallFailed({callIndex: i});
+                }
+            }
+
+            results[i] = result;
+
+            unchecked {
+                ++i;
+            }
+        }
+    }
+
     // --- Operator functionality
 
     /**

docs/_interface_ids_table.mdx

@@ -8,8 +8,8 @@
 | **LSP1UniversalReceiver**         | `0x6bb56a14` | Interface of the LSP1 - Universal Receiver standard, an entry function for a contract to receive arbitrary information.                                  |
 | **LSP1UniversalReceiverDelegate** | `0xa245bbda` | Interface of the LSP1 - Universal Receiver Delegate standard.                                                                                            |
 | **LSP6KeyManager**                | `0x23f34c62` | Interface of the LSP6 - Key Manager standard, a contract acting as a controller of an ERC725 Account using predfined permissions.                        |
-| **LSP7DigitalAsset**              | `0xdaa746b7` | Interface of the LSP7 - Digital Asset standard, a fungible digital asset.                                                                                |
-| **LSP8IdentifiableDigitalAsset**  | `0x30dc5278` | Interface of the LSP8 - Identifiable Digital Asset standard, a non-fungible digital asset.                                                               |
+| **LSP7DigitalAsset**              | `0xb3c4928f` | Interface of the LSP7 - Digital Asset standard, a fungible digital asset.                                                                                |
+| **LSP8IdentifiableDigitalAsset**  | `0x59bf8640` | Interface of the LSP8 - Identifiable Digital Asset standard, a non-fungible digital asset.                                                               |
 | **LSP9Vault**                     | `0x28af17e6` | Interface of LSP9 - Vault standard, a blockchain vault that can hold assets and interact with other smart contracts.                                     |
 | **LSP11BasicSocialRecovery**      | `0x049a28f1` | Interface of the LSP11 - Basic Social Recovery standard, a contract to recover access control into an account.                                           |
 | **LSP14Ownable2Step**             | `0x94be5999` | Interface of the LSP14 - Ownable 2-step standard, an extension of the [EIP173] (Ownable) standard with 2-step process to transfer or renounce ownership. |

docs/contracts/LSP7DigitalAsset/LSP7DigitalAsset.md

@@ -180,6 +180,45 @@ Get the number of tokens owned by `tokenOwner`. If the token is divisible (the [
 
 <br/>
 
+### batchCalls
+
+:::note References
+
+- Specification details: [**LSP-7-DigitalAsset**](https://github.com/lukso-network/lips/tree/main/LSPs/LSP-7-DigitalAsset.md#batchcalls)
+- Solidity implementation: [`LSP7DigitalAsset.sol`](https://github.com/lukso-network/lsp-smart-contracts/blob/develop/contracts/LSP7DigitalAsset/LSP7DigitalAsset.sol)
+- Function signature: `batchCalls(bytes[])`
+- Function selector: `0x6963d438`
+
+:::
+
+:::info
+
+It's not possible to send value along the functions call due to the use of `delegatecall`.
+
+:::
+
+```solidity
+function batchCalls(bytes[] data) external nonpayable returns (bytes[] results);
+```
+
+_Executing the following batch of abi-encoded function calls on the contract: `data`._
+
+Allows a caller to batch different function calls in one call. Perform a `delegatecall` on self, to call different functions with preserving the context.
+
+#### Parameters
+
+| Name   |   Type    | Description                                                          |
+| ------ | :-------: | -------------------------------------------------------------------- |
+| `data` | `bytes[]` | An array of ABI encoded function calls to be called on the contract. |
+
+#### Returns
+
+| Name      |   Type    | Description                                                      |
+| --------- | :-------: | ---------------------------------------------------------------- |
+| `results` | `bytes[]` | An array of abi-encoded data returned by the functions executed. |
+
+<br/>
+
 ### decimals
 
 :::note References
@@ -1475,6 +1514,33 @@ reverts when sending an `amount` of tokens larger than the current `balance` of
 
 <br/>
 
+### LSP7BatchCallFailed
+
+:::note References
+
+- Specification details: [**LSP-7-DigitalAsset**](https://github.com/lukso-network/lips/tree/main/LSPs/LSP-7-DigitalAsset.md#lsp7batchcallfailed)
+- Solidity implementation: [`LSP7DigitalAsset.sol`](https://github.com/lukso-network/lsp-smart-contracts/blob/develop/contracts/LSP7DigitalAsset/LSP7DigitalAsset.sol)
+- Error signature: `LSP7BatchCallFailed(uint256)`
+- Error hash: `0xb774c284`
+
+:::
+
+```solidity
+error LSP7BatchCallFailed(uint256 callIndex);
+```
+
+_Batch call failed._
+
+Reverts when a batch call failed.
+
+#### Parameters
+
+| Name        |   Type    | Description |
+| ----------- | :-------: | ----------- |
+| `callIndex` | `uint256` | -           |
+
+<br/>
+
 ### LSP7CannotSendToSelf
 
 :::note References