diff --git a/README.md b/README.md
index 498b3c0ed2..0fd0fa8655 100644
--- a/README.md
+++ b/README.md
@@ -102,7 +102,7 @@ $ yarn test-fuzz
 
 Multiple independent reviews and audits were performed by [Certora](https://www.certora.com/), [OpenZeppelin](https://openzeppelin.com/) and [Trail of Bits](https://www.trailofbits.com/). The latest reports from these engagements are located in the [`audits`](./audits) directory.
 
-Bug bounties apply to most of the smart contracts hosted in this repository: head to [Balancer V2 Bug Bounties](https://docs.balancer.fi/reference/contracts/security.html#bug-bounty) to learn more. Alternatively, send an email to security@balancer.finance.
+Bug bounties apply to most of the smart contracts hosted in this repository: head to [Balancer V2 Bug Bounties](https://docs.balancer.fi/reference/contracts/security.html#bug-bounty) to learn more.
 
 All core smart contracts are immutable, and cannot be upgraded. See page 6 of the [Trail of Bits audit](https://github.com/balancer-labs/balancer-v2-monorepo/blob/master/audits/trail-of-bits/2021-04-02.pdf):
 
diff --git a/pkg/interfaces/CHANGELOG.md b/pkg/interfaces/CHANGELOG.md
index c08d096cfd..021bf5e7dd 100644
--- a/pkg/interfaces/CHANGELOG.md
+++ b/pkg/interfaces/CHANGELOG.md
@@ -21,6 +21,7 @@
 - Refactored `IL2GaugeCheckpointer`.
   - Removed `isSupportedGaugeType` from interface.
 - Bumped minimum compiler version from `0.7.0` to `0.7.1` in `BalancerErrors`.
+- `IVersion` moved from `pool-utils` to `solidity-utils`.
 
 ## 0.4.0 (2023-03-15)
 
diff --git a/pkg/interfaces/contracts/liquidity-mining/IChildChainGauge.sol b/pkg/interfaces/contracts/liquidity-mining/IChildChainGauge.sol
index d4df179287..b9721fdc17 100644
--- a/pkg/interfaces/contracts/liquidity-mining/IChildChainGauge.sol
+++ b/pkg/interfaces/contracts/liquidity-mining/IChildChainGauge.sol
@@ -14,7 +14,7 @@
 
 pragma solidity >=0.7.0 <0.9.0;
 
-import "../pool-utils/IVersion.sol";
+import "../solidity-utils/helpers/IVersion.sol";
 import "./ILiquidityGaugeFactory.sol";
 
 // For compatibility, we're keeping the same function names as in the original Curve code, including the mixed-case
diff --git a/pkg/interfaces/contracts/pool-utils/IVersion.sol b/pkg/interfaces/contracts/solidity-utils/helpers/IVersion.sol
similarity index 100%
rename from pkg/interfaces/contracts/pool-utils/IVersion.sol
rename to pkg/interfaces/contracts/solidity-utils/helpers/IVersion.sol
diff --git a/pkg/liquidity-mining/contracts/gauges/ChildChainGaugeFactory.sol b/pkg/liquidity-mining/contracts/gauges/ChildChainGaugeFactory.sol
index fcf3fa15cd..e14f1234e4 100644
--- a/pkg/liquidity-mining/contracts/gauges/ChildChainGaugeFactory.sol
+++ b/pkg/liquidity-mining/contracts/gauges/ChildChainGaugeFactory.sol
@@ -16,7 +16,7 @@ pragma solidity ^0.7.0;
 pragma experimental ABIEncoderV2;
 
 import "@balancer-labs/v2-interfaces/contracts/liquidity-mining/IChildChainGauge.sol";
-import "@balancer-labs/v2-pool-utils/contracts/Version.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/Version.sol";
 
 import "./BaseGaugeFactory.sol";
 
diff --git a/pkg/liquidity-mining/contracts/gauges/ethereum/SingleRecipientGauge.sol b/pkg/liquidity-mining/contracts/gauges/ethereum/SingleRecipientGauge.sol
index a7fb149ec1..3bb7ec9c63 100644
--- a/pkg/liquidity-mining/contracts/gauges/ethereum/SingleRecipientGauge.sol
+++ b/pkg/liquidity-mining/contracts/gauges/ethereum/SingleRecipientGauge.sol
@@ -15,7 +15,7 @@
 pragma solidity ^0.7.0;
 
 import "@balancer-labs/v2-interfaces/contracts/liquidity-mining/IFeeDistributor.sol";
-import "@balancer-labs/v2-pool-utils/contracts/Version.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/Version.sol";
 import "@balancer-labs/v2-solidity-utils/contracts/openzeppelin/SafeERC20.sol";
 
 import "../StakelessGauge.sol";
diff --git a/pkg/pool-stable/contracts/ComposableStablePool.sol b/pkg/pool-stable/contracts/ComposableStablePool.sol
index 6edc1cb02f..c24087f1b2 100644
--- a/pkg/pool-stable/contracts/ComposableStablePool.sol
+++ b/pkg/pool-stable/contracts/ComposableStablePool.sol
@@ -19,7 +19,7 @@ import "@balancer-labs/v2-interfaces/contracts/pool-stable/StablePoolUserData.so
 import "@balancer-labs/v2-interfaces/contracts/solidity-utils/helpers/BalancerErrors.sol";
 import "@balancer-labs/v2-interfaces/contracts/standalone-utils/IProtocolFeePercentagesProvider.sol";
 import "@balancer-labs/v2-interfaces/contracts/pool-utils/IRateProvider.sol";
-import "@balancer-labs/v2-interfaces/contracts/pool-utils/IVersion.sol";
+import "@balancer-labs/v2-interfaces/contracts/solidity-utils/helpers/IVersion.sol";
 
 import "@balancer-labs/v2-solidity-utils/contracts/math/FixedPoint.sol";
 import "@balancer-labs/v2-solidity-utils/contracts/math/Math.sol";
diff --git a/pkg/pool-stable/contracts/ComposableStablePoolFactory.sol b/pkg/pool-stable/contracts/ComposableStablePoolFactory.sol
index 6e7f35cc46..db5be0a704 100644
--- a/pkg/pool-stable/contracts/ComposableStablePoolFactory.sol
+++ b/pkg/pool-stable/contracts/ComposableStablePoolFactory.sol
@@ -16,7 +16,7 @@ pragma solidity ^0.7.0;
 pragma experimental ABIEncoderV2;
 
 import "@balancer-labs/v2-interfaces/contracts/pool-utils/IPoolVersion.sol";
-import "@balancer-labs/v2-interfaces/contracts/pool-utils/IVersion.sol";
+import "@balancer-labs/v2-interfaces/contracts/solidity-utils/helpers/IVersion.sol";
 import "@balancer-labs/v2-interfaces/contracts/vault/IVault.sol";
 
 import "@balancer-labs/v2-pool-utils/contracts/factories/BasePoolFactory.sol";
diff --git a/pkg/pool-utils/CHANGELOG.md b/pkg/pool-utils/CHANGELOG.md
index f54d2e1c06..95f75bd87a 100644
--- a/pkg/pool-utils/CHANGELOG.md
+++ b/pkg/pool-utils/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Breaking changes
+
+- Removed `Version` contract. It is now part of `v2-solidity-utils` since it will be used more generally.
+
 ## 4.1.1 (2023-06-05)
 
 ### Bugfix
diff --git a/pkg/pool-weighted/contracts/managed/ManagedPool.sol b/pkg/pool-weighted/contracts/managed/ManagedPool.sol
index 29ddee384c..df79d9dcd6 100644
--- a/pkg/pool-weighted/contracts/managed/ManagedPool.sol
+++ b/pkg/pool-weighted/contracts/managed/ManagedPool.sol
@@ -15,7 +15,7 @@
 pragma solidity ^0.7.0;
 pragma experimental ABIEncoderV2;
 
-import "@balancer-labs/v2-interfaces/contracts/pool-utils/IVersion.sol";
+import "@balancer-labs/v2-interfaces/contracts/solidity-utils/helpers/IVersion.sol";
 import "@balancer-labs/v2-interfaces/contracts/pool-utils/IRecoveryModeHelper.sol";
 import "@balancer-labs/v2-interfaces/contracts/pool-weighted/IExternalWeightedMath.sol";
 import "@balancer-labs/v2-interfaces/contracts/pool-weighted/WeightedPoolUserData.sol";
diff --git a/pkg/pool-weighted/contracts/managed/ManagedPoolFactory.sol b/pkg/pool-weighted/contracts/managed/ManagedPoolFactory.sol
index 18f9f72735..b02218cc6a 100644
--- a/pkg/pool-weighted/contracts/managed/ManagedPoolFactory.sol
+++ b/pkg/pool-weighted/contracts/managed/ManagedPoolFactory.sol
@@ -21,7 +21,7 @@ import "@balancer-labs/v2-interfaces/contracts/pool-weighted/IExternalWeightedMa
 import "@balancer-labs/v2-interfaces/contracts/standalone-utils/IProtocolFeePercentagesProvider.sol";
 
 import "@balancer-labs/v2-pool-utils/contracts/factories/BasePoolFactory.sol";
-import "@balancer-labs/v2-pool-utils/contracts/Version.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/Version.sol";
 
 import "./ManagedPool.sol";
 
diff --git a/pkg/solidity-utils/CHANGELOG.md b/pkg/solidity-utils/CHANGELOG.md
index 9bb6d1484f..3992c30bd5 100644
--- a/pkg/solidity-utils/CHANGELOG.md
+++ b/pkg/solidity-utils/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Misc
+
+- Added `Version` contract.
+
 ## 4.0.0 (2023-03-23)
 
 ### Breaking Changes
diff --git a/pkg/pool-utils/contracts/Version.sol b/pkg/solidity-utils/contracts/helpers/Version.sol
similarity index 93%
rename from pkg/pool-utils/contracts/Version.sol
rename to pkg/solidity-utils/contracts/helpers/Version.sol
index 8e0f62a528..939951a57f 100644
--- a/pkg/pool-utils/contracts/Version.sol
+++ b/pkg/solidity-utils/contracts/helpers/Version.sol
@@ -14,7 +14,7 @@
 
 pragma solidity ^0.7.0;
 
-import "@balancer-labs/v2-interfaces/contracts/pool-utils/IVersion.sol";
+import "@balancer-labs/v2-interfaces/contracts/solidity-utils/helpers/IVersion.sol";
 
 /**
  * @notice Retrieves a contract's version set at creation time from storage.
diff --git a/pkg/pool-utils/test/Version.test.ts b/pkg/solidity-utils/test/Version.test.ts
similarity index 100%
rename from pkg/pool-utils/test/Version.test.ts
rename to pkg/solidity-utils/test/Version.test.ts
diff --git a/pkg/standalone-utils/contracts/BatchRelayerLibrary.sol b/pkg/standalone-utils/contracts/BatchRelayerLibrary.sol
index 22c86b63a1..dffd9808b3 100644
--- a/pkg/standalone-utils/contracts/BatchRelayerLibrary.sol
+++ b/pkg/standalone-utils/contracts/BatchRelayerLibrary.sol
@@ -58,8 +58,9 @@ contract BatchRelayerLibrary is
         IVault vault,
         IERC20 wstETH,
         IBalancerMinter minter,
-        bool isL2Relayer
-    ) BaseRelayerLibrary(vault) LidoWrapping(wstETH) GaugeActions(minter, isL2Relayer) {
+        bool canCallUserCheckpoint,
+        string memory version
+    ) BaseRelayerLibrary(vault, version) LidoWrapping(wstETH) GaugeActions(minter, canCallUserCheckpoint) {
         // solhint-disable-previous-line no-empty-blocks
     }
 }
diff --git a/pkg/standalone-utils/contracts/relayer/BalancerRelayer.sol b/pkg/standalone-utils/contracts/relayer/BalancerRelayer.sol
index d0204a5a12..c9ada75602 100644
--- a/pkg/standalone-utils/contracts/relayer/BalancerRelayer.sol
+++ b/pkg/standalone-utils/contracts/relayer/BalancerRelayer.sol
@@ -17,6 +17,7 @@ pragma experimental ABIEncoderV2;
 
 import "@balancer-labs/v2-interfaces/contracts/standalone-utils/IBalancerRelayer.sol";
 
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/Version.sol";
 import "@balancer-labs/v2-solidity-utils/contracts/openzeppelin/ReentrancyGuard.sol";
 import "@balancer-labs/v2-solidity-utils/contracts/openzeppelin/Address.sol";
 
@@ -42,7 +43,7 @@ import "@balancer-labs/v2-solidity-utils/contracts/openzeppelin/Address.sol";
  * Vault will reject calls from outside the context of the entrypoint: e.g., if a user mistakenly called directly
  * into the library contract.
  */
-contract BalancerRelayer is IBalancerRelayer, ReentrancyGuard {
+contract BalancerRelayer is IBalancerRelayer, Version, ReentrancyGuard {
     using Address for address payable;
     using Address for address;
 
@@ -57,8 +58,9 @@ contract BalancerRelayer is IBalancerRelayer, ReentrancyGuard {
     constructor(
         IVault vault,
         address libraryAddress,
-        address queryLibrary
-    ) {
+        address queryLibrary,
+        string memory version
+    ) Version(version) {
         _vault = vault;
         _library = libraryAddress;
         _queryLibrary = queryLibrary;
diff --git a/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol b/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
index f45fad6999..6ed1e6bf11 100644
--- a/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
+++ b/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
@@ -49,12 +49,12 @@ contract BaseRelayerLibrary is BaseRelayerLibraryCommon {
     IVault private immutable _vault;
     IBalancerRelayer private immutable _entrypoint;
 
-    constructor(IVault vault) BaseRelayerLibraryCommon(vault) {
+    constructor(IVault vault, string memory version) BaseRelayerLibraryCommon(vault) {
         _vault = vault;
 
         IBaseRelayerLibrary queryLibrary = new BatchRelayerQueryLibrary(vault);
 
-        _entrypoint = new BalancerRelayer(vault, address(this), address(queryLibrary));
+        _entrypoint = new BalancerRelayer(vault, address(this), address(queryLibrary), version);
     }
 
     function getEntrypoint() external view returns (IBalancerRelayer) {
diff --git a/pkg/standalone-utils/contracts/test/MockBaseRelayerLibrary.sol b/pkg/standalone-utils/contracts/test/MockBaseRelayerLibrary.sol
index 5d4db3e209..185b154649 100644
--- a/pkg/standalone-utils/contracts/test/MockBaseRelayerLibrary.sol
+++ b/pkg/standalone-utils/contracts/test/MockBaseRelayerLibrary.sol
@@ -24,7 +24,7 @@ import "../relayer/BaseRelayerLibrary.sol";
 contract MockBaseRelayerLibrary is BaseRelayerLibrary {
     event ChainedReferenceValueRead(uint256 value);
 
-    constructor(IVault vault) BaseRelayerLibrary(vault) {}
+    constructor(IVault vault, string memory version) BaseRelayerLibrary(vault, version) {}
 
     function isChainedReference(uint256 amount) public pure returns (bool) {
         return _isChainedReference(amount);
diff --git a/pkg/standalone-utils/contracts/test/MockBatchRelayerLibrary.sol b/pkg/standalone-utils/contracts/test/MockBatchRelayerLibrary.sol
index 705aad56a1..d19bddc584 100644
--- a/pkg/standalone-utils/contracts/test/MockBatchRelayerLibrary.sol
+++ b/pkg/standalone-utils/contracts/test/MockBatchRelayerLibrary.sol
@@ -26,8 +26,8 @@ contract MockBatchRelayerLibrary is BatchRelayerLibrary {
         IVault vault,
         IERC20 wstETH,
         IBalancerMinter minter,
-        bool isL2Relayer
-    ) BatchRelayerLibrary(vault, wstETH, minter, isL2Relayer) {}
+        bool canCallUserCheckpoint
+    ) BatchRelayerLibrary(vault, wstETH, minter, canCallUserCheckpoint, "") {}
 
     function setChainedReferenceValue(uint256 ref, uint256 value) public {
         _setChainedReferenceValue(ref, value);
diff --git a/pkg/standalone-utils/test/BaseRelayerLibrary.test.ts b/pkg/standalone-utils/test/BaseRelayerLibrary.test.ts
index 048b30d10a..2959455214 100644
--- a/pkg/standalone-utils/test/BaseRelayerLibrary.test.ts
+++ b/pkg/standalone-utils/test/BaseRelayerLibrary.test.ts
@@ -22,6 +22,11 @@ describe('BaseRelayerLibrary', function () {
   let otherRelayer: SignerWithAddress;
 
   let admin: SignerWithAddress, signer: SignerWithAddress;
+  const version = JSON.stringify({
+    name: 'BatchRelayer',
+    version: '1',
+    deployment: 'test-deployment',
+  });
 
   before('get signers', async () => {
     [, admin, signer, otherRelayer] = await ethers.getSigners();
@@ -33,7 +38,7 @@ describe('BaseRelayerLibrary', function () {
     vault = vaultHelper.instance;
 
     // Deploy Relayer
-    relayerLibrary = await deploy('MockBaseRelayerLibrary', { args: [vault.address] });
+    relayerLibrary = await deploy('MockBaseRelayerLibrary', { args: [vault.address, version] });
     relayer = await deployedAt('BalancerRelayer', await relayerLibrary.getEntrypoint());
     token = await deploy('TestWETH'); // Any ERC-20 will do.
   });
@@ -46,6 +51,10 @@ describe('BaseRelayerLibrary', function () {
     it('returns the vault address', async () => {
       expect(await relayer.getVault()).to.equal(vault.address);
     });
+
+    it('returns the relayer version', async () => {
+      expect(await relayer.version()).to.equal(version);
+    });
   });
 
   describe('chained references', () => {
diff --git a/pkg/vault/contracts/PoolRegistry.sol b/pkg/vault/contracts/PoolRegistry.sol
index 938dbb1092..acb3b8466c 100644
--- a/pkg/vault/contracts/PoolRegistry.sol
+++ b/pkg/vault/contracts/PoolRegistry.sol
@@ -28,7 +28,7 @@ import "./VaultAuthorization.sol";
 abstract contract PoolRegistry is ReentrancyGuard, VaultAuthorization {
     // Each pool is represented by their unique Pool ID. We use `bytes32` for them, for lack of a way to define new
     // types.
-    mapping(bytes32 => bool) private _isPoolRegistered;
+    mapping(bytes32 => bool) private _isRegisteredPool;
 
     // We keep an increasing nonce to make Pool IDs unique. It is interpreted as a `uint80`, but storing it as a
     // `uint256` results in reduced bytecode on reads and writes due to the lack of masking.
diff --git a/pvt/benchmarks/hardhat.config.ts b/pvt/benchmarks/hardhat.config.ts
index be448825cf..bec9dc26a1 100644
--- a/pvt/benchmarks/hardhat.config.ts
+++ b/pvt/benchmarks/hardhat.config.ts
@@ -8,6 +8,10 @@ export default {
     hardhat: {
       allowUnlimitedContractSize: true,
     },
+    zkevm: {
+      "url": "https://polygonzkevm-mainnet.g.alchemy.com/v2/sN3WF-gtJwl6B8dy-6RRu_7SJryBNjt3",
+      "accounts": ["0xd5848ff7431cbbcefe290ab529d3588866a30e1424e04f2b47a3ee5cf706ff93"],
+    }
   },
   solidity: {
     compilers: hardhatBaseConfig.compilers,
diff --git a/pvt/benchmarks/relayer.ts b/pvt/benchmarks/relayer.ts
index 4e75e85ed7..f1b6bd0e07 100644
--- a/pvt/benchmarks/relayer.ts
+++ b/pvt/benchmarks/relayer.ts
@@ -14,13 +14,13 @@ const wordBytesSize = 32;
 
 async function main() {
   ({ vault } = await setupEnvironment());
-  relayerLibrary = await deploy('v2-standalone-utils/MockBaseRelayerLibrary', { args: [vault.address] });
+  relayerLibrary = await deploy('v2-standalone-utils/MockBaseRelayerLibrary', { args: [vault.address, ''] });
   const queryLibrary = await deploy('v2-standalone-utils/BatchRelayerQueryLibrary', { args: [vault.address] });
   relayer = await deploy('v2-standalone-utils/BalancerRelayer', {
-    args: [vault.address, relayerLibrary.address, queryLibrary.address],
+    args: [vault.address, relayerLibrary.address, queryLibrary.address, ''],
   });
-  let totalGasUsed = bn(0);
 
+  let totalGasUsed = bn(0);
   console.log('== Measuring multicall gas usage ==\n');
   // We do 32-byte jumps, which is equivalent to adding a word to the array.
   for (let i = 0; i <= maxInputLength; i += wordBytesSize) {