chore: install openzepellin and bump solidity version

contracts/remappings.txt

@@ -2,4 +2,6 @@ eigenlayer-middleware/=lib/eigenlayer-middleware/src/
 eigenlayer-core/=lib/eigenlayer-middleware/lib/eigenlayer-contracts/src/
 eigenlayer-core-contracts/=lib/eigenlayer-middleware/lib/eigenlayer-contracts/src/contracts/core
 eigenlayer-scripts/=lib/eigenlayer-middleware/lib/eigenlayer-contracts/script/
-forge-std/=lib/forge-std/src/
+forge-std/=lib/forge-std/src/
+@openzeppelin/contracts/=lib/eigenlayer-middleware/lib/openzeppelin-contracts/contracts/
+@openzeppelin-upgrades/contracts/=lib/eigenlayer-middleware/lib/openzeppelin-contracts-upgradeable/contracts/

contracts/script/deploy/AlignedLayerDeployer.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: BUSL-1.1
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 /*
     This script is a modified version of the Mainnet_Deploy.s.sol script used by EigenDA:

contracts/script/deploy/BatcherPaymentServiceDeployer.s.sol

@@ -1,4 +1,4 @@
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {BatcherPaymentService} from "../../src/core/BatcherPaymentService.sol";
 import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";

contracts/script/deploy/EigenLayerDeployer.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: BUSL-1.1
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 // The original script used as the base of this one is:
 // https://github.com/Layr-Labs/eigenlayer-contracts/blob/7229f2b426b6f2a24c7795b1a4687a010eac8ef2/script/deploy/devnet/M2_Deploy_From_Scratch.s.sol

contracts/script/upgrade/AlignedLayerUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Script} from "forge-std/Script.sol";
 import "eigenlayer-contracts/src/contracts/core/AVSDirectory.sol";

contracts/script/upgrade/BLSApkRegistryUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Script} from "forge-std/Script.sol";
 import "eigenlayer-contracts/src/contracts/core/AVSDirectory.sol";

contracts/script/upgrade/BatcherPaymentServiceUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 import {BatcherPaymentService} from "../../src/core/BatcherPaymentService.sol";
 
 import "forge-std/Script.sol";

contracts/script/upgrade/IndexRegistryUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Script} from "forge-std/Script.sol";
 import "eigenlayer-contracts/src/contracts/core/AVSDirectory.sol";

contracts/script/upgrade/RegistryCoordinatorUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Script} from "forge-std/Script.sol";
 import "eigenlayer-contracts/src/contracts/core/AVSDirectory.sol";

contracts/script/upgrade/StakeRegistryUpgrader.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Script} from "forge-std/Script.sol";
 import "eigenlayer-contracts/src/contracts/core/AVSDirectory.sol";

contracts/src/core/AlignedLayerServiceManager.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {ServiceManagerBase, IAVSDirectory} from "eigenlayer-middleware/ServiceManagerBase.sol";
 import {BLSSignatureChecker} from "eigenlayer-middleware/BLSSignatureChecker.sol";

contracts/src/core/BatcherPaymentService.sol

@@ -1,11 +1,11 @@
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {Initializable} from "@openzeppelin-upgrades/contracts/proxy/utils/Initializable.sol";
 import {OwnableUpgradeable} from "@openzeppelin-upgrades/contracts/access/OwnableUpgradeable.sol";
 import {PausableUpgradeable} from "@openzeppelin-upgrades/contracts/security/PausableUpgradeable.sol";
 import {UUPSUpgradeable} from "@openzeppelin-upgrades/contracts/proxy/utils/UUPSUpgradeable.sol";
 import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
-import {EIP712} from "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";
+import {EIP712} from "../../lib/openzeppelin-contracts/contracts/utils/cryptography/EIP712.sol";
 import {IAlignedLayerServiceManager} from "./IAlignedLayerServiceManager.sol";
 
 contract BatcherPaymentService is

contracts/src/core/ERC20Mock.sol

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
 
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import "@openzeppelin/contracts/interfaces/IERC20.sol";
 import "@openzeppelin/contracts/utils/Context.sol";

contracts/src/core/IAlignedLayerServiceManager.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity =0.8.12;
+pragma solidity ^0.8.12;
 
 import {IBLSSignatureChecker} from "eigenlayer-middleware/interfaces/IBLSSignatureChecker.sol";