feat: Add storage snapshot data to Oracle contract，PowerVoting, adding F4 tasks to the contract

power-oracle-contracts/src/Oracle.sol

@@ -37,6 +37,9 @@ contract Oracle is IOracle, Ownable2StepUpgradeable, UUPSUpgradeable {
     // oracle node allow list
     mapping(address => bool) public nodeAllowList;
 
+    // snapshot allow list
+    mapping(address => bool) public snapshotAllowList;
+
     // address status map, key: voter address value: block height
     mapping(address => uint256) public voterAddressToBlockHeight;
 
@@ -67,6 +70,9 @@ contract Oracle is IOracle, Ownable2StepUpgradeable, UUPSUpgradeable {
     // github account list
     mapping(string => bool) public githubAccountList;
 
+    // date to cid
+    mapping(string => string) public dateToCid;
+
     /**
      * @dev Modifier that allows a function to be called only by addresses in the node allow list.
      */
@@ -77,6 +83,13 @@ contract Oracle is IOracle, Ownable2StepUpgradeable, UUPSUpgradeable {
         _;
     }
 
+    modifier onlyInSnapshotAllowList(){
+        if (!snapshotAllowList[msg.sender]) {
+            revert PermissionError("Not in  snapshot allow list error.");
+        }
+        _;
+    }
+
     /**
      * @dev Modifier that ensures the provided address is non-zero.
      * @param addr The address to check.
@@ -258,6 +271,15 @@ contract Oracle is IOracle, Ownable2StepUpgradeable, UUPSUpgradeable {
         nodeAllowList[nodeAddress] = allow;
     }
 
+    /**
+     * @notice Updates the snapshot allow list by adding or removing a snapshot address.
+     * @param snapshotAddress Address of the snapshot to be added or removed.
+     * @param allow Boolean indicating whether to allow (true) or disallow (false) the snapshot address.
+     */
+    function updateSnapshotAllowList(address snapshotAddress, bool allow) external override onlyOwner nonZeroAddress(snapshotAddress) {
+        snapshotAllowList[snapshotAddress] = allow;
+    }
+
     /**
      * @notice Retrieves the list of voter addresses.
      * @return An array containing the addresses of all voters.
@@ -275,6 +297,16 @@ contract Oracle is IOracle, Ownable2StepUpgradeable, UUPSUpgradeable {
         return voterToInfo[voter];
     }
 
+    /**
+     * @notice Adds a snapshot for a specific date with its associated IPFS CID.
+     * @param date The date associated with the snapshot.
+     * @param cid The IPFS CID corresponding to the snapshot.
+     * @dev Only addresses in the snapshot allow list can call this function.
+     */
+    function addSnapshot(string calldata date, string calldata cid) external override onlyInSnapshotAllowList  {
+        dateToCid[date] = cid;
+    }
+
     /**
      * @notice Updates the miner IDs associated with a voter based on their actor IDs.
      * @param voterAddress The address of the voter.

power-oracle-contracts/src/interfaces/IOracle.sol

@@ -93,6 +93,13 @@ interface IOracle is IOracleError {
      */
     function updateNodeAllowList(address nodeAddress, bool allow) external;
 
+    /**
+     * @notice Updates the snapshot allow list by adding or removing a snapshot address.
+     * @param snapshotAddress Address of the snapshot to be added or removed.
+     * @param allow Boolean indicating whether to allow (true) or disallow (false) the snapshot address.
+     */
+    function updateSnapshotAllowList(address snapshotAddress, bool allow) external;
+
     /**
      * @notice Removes a voter along with associated task information.
      * @param voterAddress Address of the voter to be removed.
@@ -111,6 +118,14 @@ interface IOracle is IOracleError {
      */
     function getVoterInfo(address voter) external view returns(VoterInfo memory);
 
+    /**
+     * @notice Adds a snapshot by associating a date with a CID (Content Identifier).
+     * @param date The representing the date of the snapshot.
+     * @param cid The IPFS CID (Content Identifier) for storing the snapshot data.
+     * @dev The CID is stored on the blockchain and linked to the provided date.
+     */
+    function addSnapshot(string calldata date, string calldata cid) external;
+
     /**
      * @notice Event emitted when a delegate is created.
      * @param voterAddress The address of the voter who is delegating.

powervoting-contracts/src/PowerVoting-filecoin.sol

@@ -344,7 +344,7 @@ contract PowerVoting is IPowerVoting, Ownable2StepUpgradeable, UUPSUpgradeable {
             proposal.voterInfoCid,
             proposal.voters.values()
         );
-    }
+   }
 
     /**
     * @notice Get the list of IDs of all approved proposals.
@@ -398,7 +398,6 @@ contract PowerVoting is IPowerVoting, Ownable2StepUpgradeable, UUPSUpgradeable {
         if(proposal.expTime <= block.timestamp){
             revert TimeError("Proposal expiration time reached.");
         }
-        _addF4Task();
         // increment votesCount
         uint256 vid = ++proposal.votesCount;
         // use votesCount as vote id
@@ -421,6 +420,14 @@ contract PowerVoting is IPowerVoting, Ownable2StepUpgradeable, UUPSUpgradeable {
     }
 
     /**
+    * @notice Adds a new F4 task.
+    * @dev This function is a wrapper to call the internal _addF4Task function.
+    */
+    function addF4Task() override external {
+        _addF4Task();
+    }
+
+    /**Ï
      * @notice Adds an F4 task for the caller if necessary.
      * @dev This function is called internally to check whether the caller needs to have an F4 task added.
      */

powervoting-contracts/src/interfaces/IPowerVoting-filecoin.sol

@@ -102,4 +102,10 @@ interface IPowerVoting is IPowerVotingEvent, IPowerVotingError {
      * @param minerIds An array containing the miner IDs to be added.
      */
     function addMinerId(uint64[] memory minerIds) external;
+
+    /**
+     * @notice Adds a new F4 task.
+     * @dev This function should be implemented to trigger the addition of an F4 task.
+     */
+    function addF4Task() external;
 }