contracts-bedrock: create StaticConfig lib

packages/contracts-bedrock/src/libraries/StaticConfig.sol

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.15;
+
+/// @title StaticConfig
+/// @notice Library for encoding and decoding static configuration data.
+library StaticConfig {
+    /// @notice Encodes the static configuration data for a gas paying token.
+    /// @param _token    Address of the gas paying token.
+    /// @param _decimals Number of decimals for the gas paying token.
+    /// @param _name     Name of the gas paying token.
+    /// @param _symbol   Symbol of the gas paying token.
+    /// @return Encoded static configuration data.
+    function encodeGasPayingToken(
+        address _token,
+        uint8 _decimals,
+        bytes32 _name,
+        bytes32 _symbol
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        return abi.encode(_token, _decimals, name, symbol);
+    }
+
+    /// @notice Decodes the static configuration data for a gas paying token.
+    /// @param _data Encoded static configuration data.
+    /// @return Decoded gas paying token data (token address, decimals, name, symbol).
+    function decodeGasPayingToken(bytes memory _data) internal pure returns (address, uint8, bytes32, bytes32) {
+        return abi.decode(_data, (address, uint8, bytes32, bytes32));
+    }
+
+    /// @notice Encodes the static configuration data for adding a dependency.
+    /// @param _chainId Chain ID of the dependency to add.
+    /// @return Encoded static configuration data.
+    function encodeAddDependency(uint256 _chainId) internal pure returns (bytes memory) {
+        return abi.encode(_chainId);
+    }
+
+    /// @notice Decodes the static configuration data for adding a dependency.
+    /// @param _data Encoded static configuration data.
+    /// @return Decoded chain ID of the dependency to add.
+    function decodeAddDependency(bytes memory _data) internal pure returns (uint256) {
+        return abi.decode(_data, (uint256));
+    }
+
+    /// @notice Encodes the static configuration data for removing a dependency.
+    /// @param _chainId Chain ID of the dependency to remove.
+    /// @return Encoded static configuration data.
+    function encodeRemoveDependency(uint256 _chainId) internal pure returns (bytes memory) {
+        return abi.encode(_chainId);
+    }
+
+    /// @notice Decodes the static configuration data for removing a dependency.
+    /// @param _data Encoded static configuration data.
+    /// @return Decoded chain ID of the dependency to remove.
+    function decodeRemoveDependency(bytes memory _data) internal pure returns (uint256) {
+        return abi.decode(_data, (uint256));
+    }
+}