Feat/94 emit version updated event (#98)

* Emit LineaRollupVersionChanged on upgrade

* make padded hex bytes generic

contracts/contracts/LineaRollup.sol

@@ -125,7 +125,7 @@ contract LineaRollup is
    * @param _unpauseTypeRoles The list of unpause type roles.
    * @param _gatewayOperator The address of the gateway operator.
    */
-  function reinitializePauseTypesAndPermissions(
+  function reinitializeLineaRollupV6(
     RoleAddress[] calldata _roleAddresses,
     PauseTypeRole[] calldata _pauseTypeRoles,
     PauseTypeRole[] calldata _unpauseTypeRoles,
@@ -134,6 +134,9 @@ contract LineaRollup is
     __Permissions_init(_roleAddresses);
     __PauseManager_init(_pauseTypeRoles, _unpauseTypeRoles);
     gatewayOperator = _gatewayOperator;
+
+    /// @dev using the constants requires string memory and more complex code.
+    emit LineaRollupVersionChanged(bytes8("5.0"), bytes8("6.0"));
   }
 
   /**

contracts/contracts/interfaces/l1/ILineaRollup.sol

@@ -131,6 +131,14 @@ interface ILineaRollup {
     bytes l2MessagingBlocksOffsets;
   }
 
+  /**
+   * @notice Emitted when the LineaRollup contract version has changed.
+   * @dev All bytes8 values are string based SemVer in the format M.m - e.g. "6.0";
+   * @param previousVersion The previous version.
+   * @param newVersion The new version.
+   */
+  event LineaRollupVersionChanged(bytes8 indexed previousVersion, bytes8 indexed newVersion);
+
   /**
    * @notice Emitted when the gateway operator role is granted.
    * @param caller The address that granted the role.

contracts/test/LineaRollup.ts

@@ -64,6 +64,7 @@ import {
   generateBlobDataSubmission,
   generateBlobParentShnarfData,
   ShnarfDataGenerator,
+  convertStringToPaddedHexBytes,
 } from "./utils/helpers";
 import { CalldataSubmissionData } from "./utils/types";
 import aggregatedProof1To81 from "./testData/compressedData/multipleProofs/aggregatedProof-1-81.json";
@@ -2244,7 +2245,7 @@ describe("Linea Rollup contract", () => {
       const NewLineaRollupFactory = await ethers.getContractFactory("contracts/LineaRollup.sol:LineaRollup");
       const newLineaRollup = await upgrades.upgradeProxy(lineaRollup, NewLineaRollupFactory);
 
-      await newLineaRollup.reinitializePauseTypesAndPermissions(
+      const upgradeCall = newLineaRollup.reinitializeLineaRollupV6(
         [
           { addressWithRole: securityCouncil.address, role: DEFAULT_ADMIN_ROLE },
           { addressWithRole: securityCouncil.address, role: VERIFIER_SETTER_ROLE },
@@ -2254,10 +2255,18 @@ describe("Linea Rollup contract", () => {
         multiCallAddress,
       );
 
+      const expectedVersion5Bytes8 = convertStringToPaddedHexBytes("5.0", 8);
+      const expectedVersion6Bytes8 = convertStringToPaddedHexBytes("6.0", 8);
+
+      await expectEvent(newLineaRollup, upgradeCall, "LineaRollupVersionChanged", [
+        expectedVersion5Bytes8,
+        expectedVersion6Bytes8,
+      ]);
+
       expect(await newLineaRollup.currentL2BlockNumber()).to.equal(0);
     });
 
-    it("Should revert with ZeroAddressNotAllowed when addressWithRole is zero address in reinitializePauseTypesAndPermissions", async () => {
+    it("Should revert with ZeroAddressNotAllowed when addressWithRole is zero address in reinitializeLineaRollupV6", async () => {
       // Deploy new implementation
       const NewLineaRollupFactory = await ethers.getContractFactory("contracts/LineaRollup.sol:LineaRollup");
       const newLineaRollup = await upgrades.upgradeProxy(lineaRollup, NewLineaRollupFactory);
@@ -2270,12 +2279,7 @@ describe("Linea Rollup contract", () => {
 
       await expectRevertWithCustomError(
         newLineaRollup,
-        newLineaRollup.reinitializePauseTypesAndPermissions(
-          roleAddresses,
-          pauseTypeRoles,
-          unpauseTypeRoles,
-          multiCallAddress,
-        ),
+        newLineaRollup.reinitializeLineaRollupV6(roleAddresses, pauseTypeRoles, unpauseTypeRoles, multiCallAddress),
         "ZeroAddressNotAllowed",
       );
     });

contracts/test/utils/helpers.ts

@@ -496,3 +496,15 @@ export async function expectEvent(contract: any, asyncCall: Promise<any>, eventN
     .to.emit(contract, eventName)
     .withArgs(...eventArgs);
 }
+
+export function convertStringToPaddedHexBytes(strVal: string, paddedSize: number): string {
+  if (strVal.length > paddedSize) {
+    throw "Length is longer than padded size!";
+  }
+
+  const strBytes = ethers.toUtf8Bytes(strVal);
+  const bytes = ethers.zeroPadBytes(strBytes, paddedSize);
+  const bytes8Hex = ethers.hexlify(bytes);
+
+  return bytes8Hex;
+}