feat(solidity): bridge fee quote contract (#734)

Co-authored-by: todd <[email protected]>

contract/compile.sh

@@ -31,7 +31,7 @@ echo "===> Compiling contracts"
 [[ ! -d "$project_dir/contract/artifacts" ]] && mkdir -p "$project_dir/contract/artifacts"
 
 # add core contracts
-contracts=(WFXUpgradable FIP20Upgradable ICrossChain IStaking IFxBridgeLogic IBridgeCallback IError)
+contracts=(WFXUpgradable FIP20Upgradable ICrossChain IStaking IFxBridgeLogic IBridgeCallback IError IBridgeFeeQuote)
 contracts_test=(CrossChainTest StakingTest)
 # add 3rd party contracts
 contracts+=(ERC1967Proxy)

solidity/contracts/bridge/BridgeFeeOracle.sol

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.0;
+
+import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
+import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
+import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
+import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
+import {EnumerableSetUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
+import {IBridgeFeeOracle} from "./IBridgeFee.sol";
+import {ICrossChain} from "./ICrossChain.sol";
+
+contract BridgeFeeOracle is
+    IBridgeFeeOracle,
+    Initializable,
+    UUPSUpgradeable,
+    AccessControlUpgradeable,
+    ReentrancyGuardUpgradeable
+{
+    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
+
+    bytes32 public constant QUOTE_ROLE = keccak256("QUOTE_ROLE");
+
+    address public crossChainContract;
+    address public defaultOracle;
+
+    struct State {
+        bool isBlacklisted;
+        bool isActive;
+    }
+
+    EnumerableSetUpgradeable.AddressSet private oracles;
+    mapping(address => State) public oracleStatus;
+
+    function initialize(address _crossChain) public initializer {
+        __AccessControl_init();
+        __UUPSUpgradeable_init();
+        __ReentrancyGuard_init();
+
+        crossChainContract = _crossChain;
+
+        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
+    }
+
+    /**
+     * @notice Checks if an oracle is online for a given chain.
+     * @param _chainName The name of the chain.
+     * @param _oracle The address of the oracle.
+     * @return bool indicating if the oracle is online.
+     */
+    function isOnline(
+        string memory _chainName,
+        address _oracle
+    ) external onlyRole(QUOTE_ROLE) nonReentrant returns (bool) {
+        if (oracleStatus[_oracle].isActive) return true;
+        if (oracleStatus[_oracle].isBlacklisted) return false;
+        if (!ICrossChain(crossChainContract).hasOracle(_chainName, _oracle)) {
+            return false;
+        }
+        if (
+            !ICrossChain(crossChainContract).isOracleOnline(_chainName, _oracle)
+        ) {
+            return false;
+        }
+        oracleStatus[_oracle] = State(false, true);
+        oracles.add(_oracle);
+        return true;
+    }
+
+    function blackOracle(
+        address _oracle
+    ) external onlyRole(DEFAULT_ADMIN_ROLE) nonReentrant {
+        if (oracleStatus[_oracle].isBlacklisted) return;
+        if (oracleStatus[_oracle].isActive) {
+            oracleStatus[_oracle].isActive = false;
+            oracles.remove(_oracle);
+        }
+        oracleStatus[_oracle].isBlacklisted = true;
+    }
+
+    function setDefaultOracle(
+        address _defaultOracle
+    ) external onlyRole(DEFAULT_ADMIN_ROLE) {
+        if (!oracles.contains(_defaultOracle)) {
+            oracleStatus[_defaultOracle] = State(false, true);
+            oracles.add(_defaultOracle);
+        }
+        defaultOracle = _defaultOracle;
+    }
+
+    function getOracleList() external view returns (address[] memory) {
+        return oracles.values();
+    }
+
+    function _authorizeUpgrade(
+        address
+    ) internal override onlyRole(DEFAULT_ADMIN_ROLE) {} // solhint-disable-line no-empty-blocks
+}