auto-10161: replicate v2_3 to v2_3_zksync (smartcontractkit#14035)

* auto-10161: replicate v2_3 to v2_3_zksync

* update

* small fixes

* add an zksync automation forwarder

* fix linter

* update

* update

* lint

contracts/.changeset/loud-lobsters-guess.md

@@ -0,0 +1,5 @@
+---
+'@chainlink/contracts': patch
+---
+
+auto: create a replication from v2_3 to v2_3_zksync

contracts/.solhintignore

@@ -18,6 +18,7 @@
 ./src/v0.8/automation/libraries/internal/Cron.sol
 ./src/v0.8/automation/AutomationForwarder.sol
 ./src/v0.8/automation/AutomationForwarderLogic.sol
+./src/v0.8/automation/ZKSyncAutomationForwarder.sol
 ./src/v0.8/automation/interfaces/v2_2/IAutomationRegistryMaster.sol
 ./src/v0.8/automation/interfaces/v2_3/IAutomationRegistryMaster2_3.sol
 

contracts/scripts/native_solc_compile_all_automation

@@ -108,4 +108,4 @@ compileContract automation/v2_3/AutomationUtils2_3.sol
 compileContract automation/interfaces/v2_3/IAutomationRegistryMaster2_3.sol
 
 compileContract automation/testhelpers/MockETHUSDAggregator.sol
-compileContract automation/test/v2_3/WETH9.sol
+compileContract automation/test/WETH9.sol

contracts/src/v0.8/automation/ZKSyncAutomationForwarder.sol

@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.16;
+
+import {IAutomationRegistryConsumer} from "./interfaces/IAutomationRegistryConsumer.sol";
+
+uint256 constant PERFORM_GAS_CUSHION = 5_000;
+
+/**
+ * @title AutomationForwarder is a relayer that sits between the registry and the customer's target contract
+ * @dev The purpose of the forwarder is to give customers a consistent address to authorize against,
+ * which stays consistent between migrations. The Forwarder also exposes the registry address, so that users who
+ * want to programmatically interact with the registry (ie top up funds) can do so.
+ */
+contract ZKSyncAutomationForwarder {
+  /// @notice the user's target contract address
+  address private immutable i_target;
+
+  /// @notice the shared logic address
+  address private immutable i_logic;
+
+  IAutomationRegistryConsumer private s_registry;
+
+  constructor(address target, address registry, address logic) {
+    s_registry = IAutomationRegistryConsumer(registry);
+    i_target = target;
+    i_logic = logic;
+  }
+
+  /**
+   * @notice forward is called by the registry and forwards the call to the target
+   * @param gasAmount is the amount of gas to use in the call
+   * @param data is the 4 bytes function selector + arbitrary function data
+   * @return success indicating whether the target call succeeded or failed
+   */
+  function forward(uint256 gasAmount, bytes memory data) external returns (bool success, uint256 gasUsed) {
+    if (msg.sender != address(s_registry)) revert();
+    address target = i_target;
+    gasUsed = gasleft();
+    assembly {
+      let g := gas()
+      // Compute g -= PERFORM_GAS_CUSHION and check for underflow
+      if lt(g, PERFORM_GAS_CUSHION) {
+        revert(0, 0)
+      }
+      g := sub(g, PERFORM_GAS_CUSHION)
+      // if g - g//64 <= gasAmount, revert
+      // (we subtract g//64 because of EIP-150)
+      if iszero(gt(sub(g, div(g, 64)), gasAmount)) {
+        revert(0, 0)
+      }
+      // solidity calls check that a contract actually exists at the destination, so we do the same
+      if iszero(extcodesize(target)) {
+        revert(0, 0)
+      }
+      // call with exact gas
+      success := call(gasAmount, target, 0, add(data, 0x20), mload(data), 0, 0)
+    }
+    gasUsed = gasUsed - gasleft();
+    return (success, gasUsed);
+  }
+
+  function getTarget() external view returns (address) {
+    return i_target;
+  }
+
+  fallback() external {
+    // copy to memory for assembly access
+    address logic = i_logic;
+    // copied directly from OZ's Proxy contract
+    assembly {
+      // Copy msg.data. We take full control of memory in this inline assembly
+      // block because it will not return to Solidity code. We overwrite the
+      // Solidity scratch pad at memory position 0.
+      calldatacopy(0, 0, calldatasize())
+
+      // out and outsize are 0 because we don't know the size yet.
+      let result := delegatecall(gas(), logic, 0, calldatasize(), 0, 0)
+
+      // Copy the returned data.
+      returndatacopy(0, 0, returndatasize())
+
+      switch result
+      // delegatecall returns 0 on error.
+      case 0 {
+        revert(0, returndatasize())
+      }
+      default {
+        return(0, returndatasize())
+      }
+    }
+  }
+}

contracts/src/v0.8/automation/test/v2_3/BaseTest.t.sol

@@ -20,14 +20,14 @@ import {ChainModuleBase} from "../../chains/ChainModuleBase.sol";
 import {IERC20Metadata as IERC20} from "../../../vendor/openzeppelin-solidity/v4.8.3/contracts/token/ERC20/extensions/IERC20Metadata.sol";
 import {MockUpkeep} from "../../mocks/MockUpkeep.sol";
 import {IWrappedNative} from "../../interfaces/v2_3/IWrappedNative.sol";
-import {WETH9} from "./WETH9.sol";
+import {WETH9} from "../WETH9.sol";
 
 /**
  * @title BaseTest provides basic test setup procedures and dependencies for use by other
  * unit tests
  */
 contract BaseTest is Test {
-  // test state (not exposed to derrived tests)
+  // test state (not exposed to derived tests)
   uint256 private nonce;
 
   // constants