ZIL-5471: Bridge Improvements (#276)

* [refactor] clean up tests

* Add significant improvements

pnpm-workspace.yaml

@@ -11,4 +11,3 @@ packages:
   - "zilliqa/js/zilliqa"
   - "examples/zilliqa-js/latest-block"
   - "examples/zilliqa-js/react-zilliqa-js"
-  - "zilliqa/products/bridge"

products/bridge/contracts/Bridged.sol

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import "hardhat/console.sol";
+
+import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
+import "./Relayer.sol";
+
+abstract contract Bridged is Initializable {
+    Relayer private _relayer;
+
+    function initialize(Relayer relayer) public initializer {
+        _relayer = relayer;
+    }
+
+    modifier onlyRelayer() {
+        require(msg.sender == address(_relayer), "Must be called by relayer");
+        _;
+    }
+
+    function dispatched(
+        address target,
+        bytes memory call
+    ) public payable onlyRelayer returns (bool success, bytes memory response) {
+        console.log("dispatched()");
+        (success, response) = target.call{value: msg.value, gas: 100000}(call);
+    }
+
+    function queried(
+        address target,
+        bytes memory call
+    ) public view onlyRelayer returns (bool success, bytes memory response) {
+        console.log("queried()");
+        (success, response) = target.staticcall{gas: 100000}(call);
+    }
+
+    function relay(
+        address target,
+        bytes memory call,
+        bool readonly,
+        bytes4 callback
+    ) internal returns (uint nonce) {
+        nonce = _relayer.relay(target, call, readonly, callback);
+    }
+}

products/bridge/contracts/Collector.sol

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import "./ValidatorManager.sol";
+
+contract Collector {
+    ValidatorManager private validatorManager;
+    event Echoed(bytes32 indexed hash, bytes signature);
+
+    constructor(ValidatorManager _validatorManager) {
+        validatorManager = _validatorManager;
+    }
+
+    function echo(bytes32 hash, bytes memory signature) public {
+        require(
+            validatorManager.validateSignature(hash, signature),
+            "Wrong validator"
+        );
+        emit Echoed(hash, signature);
+    }
+}