Move ImportedMessageRoot event to ORMP contract #153 (#155)

* fmt

* clean

* move

* fix test

src/ORMP.sol

@@ -33,6 +33,10 @@ contract ORMP is ReentrancyGuard, Channel {
     event MessageAssigned(
         bytes32 indexed msgHash, address indexed oracle, address indexed relayer, uint256 oracleFee, uint256 relayerFee
     );
+    event HashImported(uint256 indexed srcChainId, address indexed oracle, bytes32 indexed lookupKey, bytes32 hash);
+
+    /// oracle => srcChainId => lookupKey => hash
+    mapping(address => mapping(uint256 => mapping(bytes32 => bytes32))) public hashLookup;
 
     constructor(address dao) Channel(dao) {}
 
@@ -66,6 +70,17 @@ contract ORMP is ReentrancyGuard, Channel {
         return msgHash;
     }
 
+    /// @dev Import hash by any oracle address.
+    /// @notice Hash is an abstract of the proof system, it can be a block hash or a message root hash,
+    ///  		specifically provided by oracles.
+    /// @param srcChainId The source chain Id.
+    /// @param lookupKey The key for loop up hash.
+    /// @param hash_ The hash to import.
+    function importHash(uint256 srcChainId, bytes32 lookupKey, bytes32 hash_) external {
+        hashLookup[msg.sender][srcChainId][lookupKey] = hash_;
+        emit HashImported(srcChainId, msg.sender, lookupKey, hash_);
+    }
+
     function _handleFee(
         address ua,
         address refund,

src/eco/Oracle.sol

@@ -18,19 +18,19 @@
 pragma solidity 0.8.17;
 
 import "../Verifier.sol";
+import "../interfaces/IORMP.sol";
 
 contract Oracle is Verifier {
     event SetFee(uint256 indexed chainId, uint256 fee);
     event SetApproved(address operator, bool approve);
     event Withdrawal(address indexed to, uint256 amt);
     event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
-    event ImportedMessageRoot(uint256 indexed chainId, uint256 indexed blockHeight, bytes32 messageRoot);
+
+    address public immutable PROTOCOL;
 
     address public owner;
     // chainId => price
     mapping(uint256 => uint256) public feeOf;
-    // chainId => blockNumber => messageRoot
-    mapping(uint256 => mapping(uint256 => bytes32)) rootOf;
     // operator => isApproved
     mapping(address => bool) public approvedOf;
 
@@ -44,7 +44,8 @@ contract Oracle is Verifier {
         _;
     }
 
-    constructor(address dao) {
+    constructor(address dao, address ormp) {
+        PROTOCOL = ormp;
         owner = dao;
     }
 
@@ -60,8 +61,7 @@ contract Oracle is Verifier {
     /// @param blockNumber The source chain block number.
     /// @param messageRoot The source chain message root corresponding to the channel.
     function importMessageRoot(uint256 chainId, uint256 blockNumber, bytes32 messageRoot) external onlyOwner {
-        rootOf[chainId][blockNumber] = messageRoot;
-        emit ImportedMessageRoot(chainId, blockNumber, messageRoot);
+        IORMP(PROTOCOL).importHash(chainId, bytes32(blockNumber), messageRoot);
     }
 
     function changeOwner(address newOwner) external onlyOwner {
@@ -97,6 +97,6 @@ contract Oracle is Verifier {
     }
 
     function merkleRoot(uint256 chainId, uint256 blockNumber) public view override returns (bytes32) {
-        return rootOf[chainId][blockNumber];
+        return IORMP(PROTOCOL).hashLookup(address(this), chainId, bytes32(blockNumber));
     }
 }

src/interfaces/IORMP.sol

@@ -74,4 +74,19 @@ interface IORMP {
     /// @param msgHash Hash of the checked message.
     /// @return Return the dispatched result of the checked message.
     function dones(bytes32 msgHash) external view returns (bool);
+
+    /// @dev Import hash by any oracle address.
+    /// @notice Hash is an abstract of the proof system, it can be a block hash or a message root hash,
+    ///  		specifically provided by oracles.
+    /// @param srcChainId The source chain Id.
+    /// @param lookupKey The key for loop up hash.
+    /// @param hash_ The hash to import.
+    function importHash(uint256 srcChainId, bytes32 lookupKey, bytes32 hash_) external;
+
+    /// @dev Fetch hash.
+    /// @param oracle The oracle address.
+    /// @param srcChainId The source chain Id.
+    /// @param lookupKey The key for loop up hash.
+    /// @return Return the hash imported by the oracle.
+    function hashLookup(address oracle, uint256 srcChainId, bytes32 lookupKey) external view returns (bytes32);
 }

test/eco/Oracle.t.sol

@@ -71,7 +71,7 @@ contract OracleTest is Test {
         assertEq(r, bytes32(uint256(1)));
     }
 
-    function merkleRoot(uint256, uint256) external pure returns (bytes32) {
+    function hashLookup(address, uint256, bytes32) external pure returns (bytes32) {
         return bytes32(uint256(1));
     }
 }