mudgen

//SPDX-License-Identifier: MIT
pragma solidity =0.8.9;

// AppStorage.sol
struct AppStorage {
  uint256 secondVar;
  uint256 firstVar;
  uint256 lastVar;
  ...
}

mudgen

DiamondStorage storage ds = diamondStorage();
bytes4 functionSelector = bytes4(keccak256("myFunction(uint256)"));
// get facet address of function
address facet = ds.selectorToFacet[functionSelector];
bytes memory myFunctionCall = abi.encodeWithSelector(functionSelector, 4);
(bool success, uint result) = address(facet).delegatecall(myFunctionCall);
require(success, "myFunction failed");

mudgen

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

DiamondStorage storage ds = diamondStorage();
bytes4 functionSelector = bytes4(keccak256("myFunction(uint256)"));
// get facet address of function 
address facet = ds.selectorToFacet[functionSelector]; 
bytes memory myFunctionCall = abi.encodeWithSelector(functionSelector, 4); 
(bool success, bytes memory result) = address(facet).delegatecall(myFunctionCall); 
require(success, "myFunction failed"); 

mudgen

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./AppStorage.sol"

contract StakingFacet {
  AppStorage internal s;

  function myFacetFunction(uint256 _nextVar) external {
    s.total = s.firstVar + _nextVar;

mudgen

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// A contract that implements Diamond Storage.
library LibA {

  // This struct contains state variables we care about.
  struct DiamondStorage {
    address owner;
    bytes32 dataA;

mudgen

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Find facet for function that is called and execute the
// function if a facet is found and return any value.
fallback() external payable {
  // get facet from function selector
  address facet = selectorTofacet[msg.sig];
  require(facet != address(0));
  // Execute external function from facet using delegatecall and return any value.

mudgen

//LibAppStorage.sol

struct AppStorage {
  uint256 secondVar;
  uint256 firstVar;
  uint256 lastVar;
  ...
}

library LibAppStorage {

mudgen

//LibAppStorage.sol

struct AppStorage {
  uint256 secondVar;
  uint256 firstVar;
  uint256 lastVar;
  ...
}

library LibAppStorage {

mudgen

//LibAppStorage.sol

struct AppStorage {
  uint256 secondVar;
  uint256 firstVar;
  uint256 lastVar;
  ...
}

library LibAppStorage {

mudgen

// AppStorage.sol
struct AppStorage {
  uint256 secondVar;
  uint256 firstVar;
  uint256 lastVar;
  ...
}

// StakingFacet.sol
import "./AppStorage.sol"