Add ERC-6372 Contract Clock interface to VestingWallet

.changeset/warm-walls-glow.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`VestingWallet`: Add `IERC6372` (Contract Clock interface) support, exposing `clock()` and `CLOCK_MODE()` for timestamp-based operation.

contracts/finance/VestingWallet.sol

@@ -8,6 +8,8 @@ import {SafeERC20} from "../token/ERC20/utils/SafeERC20.sol";
 import {Address} from "../utils/Address.sol";
 import {Context} from "../utils/Context.sol";
 import {Ownable} from "../access/Ownable.sol";
+import {IERC6372} from "../interfaces/IERC6372.sol";
+import {Time} from "../utils/types/Time.sol";
 
 /**
  * @dev A vesting wallet is an ownable contract that can receive native currency and ERC-20 tokens, and release these
@@ -33,7 +35,7 @@ import {Ownable} from "../access/Ownable.sol";
  * at 50% of the vesting period, the beneficiary can withdraw 50 A as ERC20 and 25 A as native currency (totaling 75 A).
  * Consider disabling one of the withdrawal methods.
  */
-contract VestingWallet is Context, Ownable {
+contract VestingWallet is Context, Ownable, IERC6372 {
     event EtherReleased(uint256 amount);
     event ERC20Released(address indexed token, uint256 amount);
 
@@ -51,6 +53,19 @@ contract VestingWallet is Context, Ownable {
         _duration = durationSeconds;
     }
 
+    /**
+     * @dev Clock used for the vesting schedule, based on {Time-timestamp}.
+     */
+    function clock() public view virtual returns (uint48) {
+        return Time.timestamp();
+    }
+
+    /// @inheritdoc IERC6372
+    // solhint-disable-next-line func-name-mixedcase
+    function CLOCK_MODE() public pure virtual returns (string memory) {
+        return "mode=timestamp";
+    }
+
     /**
      * @dev The contract should be able to receive Eth.
      */

test/finance/VestingWallet.test.js

@@ -6,6 +6,7 @@ const { min } = require('../helpers/math');
 const time = require('../helpers/time');
 
 const { envSetup, shouldBehaveLikeVesting } = require('./VestingWallet.behavior');
+const { shouldBehaveLikeERC6372 } = require('../governance/utils/ERC6372.behavior');
 
 async function fixture() {
   const amount = ethers.parseEther('100');
@@ -45,6 +46,10 @@ describe('VestingWallet', function () {
     expect(await this.mock.end()).to.equal(this.start + this.duration);
   });
 
+  describe('ERC-6372 clock', function () {
+    shouldBehaveLikeERC6372('timestamp');
+  });
+
   describe('vesting schedule', function () {
     describe('Eth vesting', function () {
       beforeEach(async function () {