update pragma to ^0.8.20

messagelib/contracts/Executor.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ReentrancyGuardUpgradeable } from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
 import { Proxied } from "hardhat-deploy/solc_0.8/proxy/Proxied.sol";

messagelib/contracts/ExecutorFeeLib.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 

messagelib/contracts/MessageLibBase.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 /// @dev simply a container of endpoint address and local eid
 abstract contract MessageLibBase {

messagelib/contracts/PriceFeed.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
 import { Proxied } from "hardhat-deploy/solc_0.8/proxy/Proxied.sol";

messagelib/contracts/ReceiveLibBaseE2.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
 import { ERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";

messagelib/contracts/SendLibBase.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";

messagelib/contracts/SendLibBaseE2.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
 import { ERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";

messagelib/contracts/Treasury.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 

messagelib/contracts/Worker.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Pausable } from "@openzeppelin/contracts/security/Pausable.sol";
 import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";

messagelib/contracts/libs/SafeCall.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 /// @dev copied from https://github.com/nomad-xyz/ExcessivelySafeCall/blob/main/src/ExcessivelySafeCall.sol.
 library SafeCall {

messagelib/contracts/uln/ReceiveUlnBase.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";
 

messagelib/contracts/uln/SendUlnBase.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Packet } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
 import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";

messagelib/contracts/uln/UlnBase.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 

messagelib/contracts/uln/dvn/DVN.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ILayerZeroUltraLightNodeV2 } from "@layerzerolabs/lz-evm-v1-0.7/contracts/interfaces/ILayerZeroUltraLightNodeV2.sol";
 

messagelib/contracts/uln/dvn/DVNFeeLib.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";

messagelib/contracts/uln/dvn/MultiSig.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ECDSA } from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 

messagelib/contracts/uln/libs/DVNOptions.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { BytesLib } from "solidity-bytes-utils/contracts/BytesLib.sol";
 

messagelib/contracts/uln/libs/UlnOptions.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
 

messagelib/contracts/uln/uln301/AddressSizeConfig.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 

messagelib/contracts/uln/uln301/ReceiveLibBaseE1.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
 import { ILayerZeroEndpoint } from "@layerzerolabs/lz-evm-v1-0.7/contracts/interfaces/ILayerZeroEndpoint.sol";

messagelib/contracts/uln/uln301/ReceiveUln301.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
 

messagelib/contracts/uln/uln301/SendLibBaseE1.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Packet } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
 import { AddressCast } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/AddressCast.sol";

messagelib/contracts/uln/uln301/SendUln301.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Packet } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
 

messagelib/contracts/uln/uln301/TreasuryFeeHandler.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

messagelib/contracts/uln/uln302/ReceiveUln302.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";
 import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol";

messagelib/contracts/uln/uln302/SendUln302.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Packet } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
 import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol";

messagelib/contracts/upgradeable/WorkerUpgradeable.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LZBL-1.2
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { PausableUpgradeable } from "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
 import { AccessControlUpgradeable } from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
@@ -182,5 +182,5 @@ abstract contract WorkerUpgradeable is Initializable, AccessControlUpgradeable,
      * variables without shifting down storage in the inheritance chain.
      * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
      */
-    uint256[45] private __gap;
+    uint256[47] private __gap;
 }

messagelib/test/mocks/ReceiveLibMock.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: UNLICENSED
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol";
 import { IMessageLib, MessageLibType } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLib.sol";

messagelib/test/mocks/SendLibMock.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: UNLICENSED
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol";
 import { MessagingFee } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";

oapp/contracts/oapp/OApp.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 // @dev Import the 'MessagingFee' so it's exposed to OApp implementers
 // solhint-disable-next-line no-unused-import

oapp/contracts/oapp/OAppCore.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { IOAppCore, ILayerZeroEndpointV2 } from "./interfaces/IOAppCore.sol";

oapp/contracts/oapp/OAppReceiver.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ILayerZeroReceiver, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroReceiver.sol";
 import { OAppCore } from "./OAppCore.sol";

oapp/contracts/oapp/OAppSender.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
 import { MessagingParams, MessagingFee, MessagingReceipt } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";

oapp/contracts/oapp/examples/OmniCounter.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ILayerZeroEndpointV2, MessagingFee, MessagingReceipt, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
 import { ILayerZeroComposer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroComposer.sol";

oapp/contracts/oapp/examples/OmniCounterPreCrime.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { PreCrime, PreCrimePeer } from "../../precrime/PreCrime.sol";
 import { InboundPacket } from "../../precrime/libs/Packet.sol";

oapp/contracts/oapp/interfaces/IOAppComposer.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ILayerZeroComposer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroComposer.sol";
 

oapp/contracts/oapp/interfaces/IOAppCore.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ILayerZeroEndpointV2 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
 

oapp/contracts/oapp/interfaces/IOAppMsgInspector.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 /**
  * @title IOAppMsgInspector

oapp/contracts/oapp/interfaces/IOAppOptionsType3.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 /**
  * @dev Struct representing enforced option parameters.

oapp/contracts/oapp/libs/OAppOptionsType3.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { IOAppOptionsType3, EnforcedOptionParam } from "../interfaces/IOAppOptionsType3.sol";

oapp/contracts/oapp/libs/OptionsBuilder.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { BytesLib } from "solidity-bytes-utils/contracts/BytesLib.sol";
 import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";

oapp/contracts/oft/OFT.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import { OFTCore } from "./OFTCore.sol";

oapp/contracts/oft/OFTAdapter.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { IERC20Metadata, IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
 import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

oapp/contracts/oft/OFTCore.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { OApp, Origin } from "../oapp/OApp.sol";
 import { OAppOptionsType3 } from "../oapp/libs/OAppOptionsType3.sol";
@@ -314,7 +314,7 @@ abstract contract OFTCore is IOFT, OApp, OAppPreCrimeSimulator, OAppOptionsType3
     }
 
     /**
-     * @dev Internal function to check if peer is considered 'trusted' by the OApp.
+     * @dev Check if the peer is considered 'trusted' by the OApp.
      * @param _eid The endpoint ID to check.
      * @param _peer The peer to check.
      * @return Whether the peer passed is considered 'trusted' by the OApp.

oapp/contracts/oft/OFTPrecrime.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 // import { IOApp } from "../../interfaces/IOApp.sol";
 // import { IOFT } from "./interfaces/IOFT.sol";

oapp/contracts/oft/interfaces/IOFT.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 import { MessagingReceipt, MessagingFee } from "../../oapp/OAppSender.sol";
 

oapp/contracts/oft/libs/OFTComposeMsgCodec.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 library OFTComposeMsgCodec {
     // Offset constants for decoding composed messages

oapp/contracts/oft/libs/OFTMsgCodec.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-pragma solidity ^0.8.22;
+pragma solidity ^0.8.20;
 
 library OFTMsgCodec {
     // Offset constants for encoding and decoding OFT messages