ctb: Add echidna test ensuring depositTransaction completes

.changeset/famous-insects-try.md

+---
+'@eth-optimism/contracts-bedrock': patch
+---
+
+Add echidna tests for portal

.circleci/config.yml

@@ -856,6 +856,11 @@ workflows:
           echidna_target: hashing
           requires:
             - bedrock-echidna-build
+      - bedrock-echidna-run:
+          name: Bedrock Echidna Portal Test
+          echidna_target: portal
+          requires:
+            - bedrock-echidna-build
       - op-bindings-build:
           requires:
             - yarn-monorepo

packages/contracts-bedrock/contracts/echidna/FuzzOptimismPortal.sol

+pragma solidity 0.8.15;
+
+import { OptimismPortal } from "../L1/OptimismPortal.sol";
+import { L2OutputOracle } from "../L1/L2OutputOracle.sol";
+import { AddressAliasHelper } from "../vendor/AddressAliasHelper.sol";
+
+contract EchidnaFuzzOptimismPortal {
+    OptimismPortal internal portal;
+    bool internal failedToComplete;
+
+    constructor() {
+        portal = new OptimismPortal(L2OutputOracle(address(0)), 10);
+    }
+
+    // A test intended to identify any unexpected halting conditions
+    function testDepositTransactionCompletes(
+        address _to,
+        uint256 _mint,
+        uint256 _value,
+        uint64 _gasLimit,
+        bool _isCreation,
+        bytes memory _data
+    ) public payable {
+        failedToComplete = true;
+        require(!_isCreation || _to == address(0), "EchidnaFuzzOptimismPortal: invalid test case.");
+        portal.depositTransaction{ value: _mint }(_to, _value, _gasLimit, _isCreation, _data);
+        failedToComplete = false;
+    }
+
+    function echidna_deposit_completes() public view returns (bool) {
+        return !failedToComplete;
+    }
+}