- Contract name:
- DiamondCutFacet
- Optimization enabled
- false
- Compiler version
- v0.8.17+commit.8df45f5f
- Verified at
- 2024-01-05T17:54:18.762900Z
contracts/facets/DiamondCutFacet.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/
import { IDiamondCut } from "../interfaces/IDiamondCut.sol";
import { LibDiamond } from "../libraries/LibDiamond.sol";
// Remember to add the loupe functions from DiamondLoupeFacet to the diamond.
// The loupe functions are required by the EIP2535 Diamonds standard
contract DiamondCutFacet is IDiamondCut {
/// @notice Add/replace/remove any number of functions and optionally execute
/// a function with delegatecall
/// @param _diamondCut Contains the facet addresses and function selectors
/// @param _init The address of the contract or facet to execute _calldata
/// @param _calldata A function call, including function selector and arguments
/// _calldata is executed with delegatecall on _init
function diamondCut(
FacetCut[] calldata _diamondCut,
address _init,
bytes calldata _calldata
) external override {
LibDiamond.enforceIsContractOwner();
LibDiamond.diamondCut(_diamondCut, _init, _calldata);
}
}
contracts/interfaces/IDiamond.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/
interface IDiamond {
enum FacetCutAction {
Add,
Replace,
Remove
}
// Add=0, Replace=1, Remove=2
struct FacetCut {
address facetAddress;
FacetCutAction action;
bytes4[] functionSelectors;
}
event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);
}
contracts/interfaces/IDiamondCut.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/
import { IDiamond } from "./IDiamond.sol";
interface IDiamondCut is IDiamond {
/// @notice Add/replace/remove any number of functions and optionally execute
/// a function with delegatecall
/// @param _diamondCut Contains the facet addresses and function selectors
/// @param _init The address of the contract or facet to execute _calldata
/// @param _calldata A function call, including function selector and arguments
/// _calldata is executed with delegatecall on _init
function diamondCut(
FacetCut[] calldata _diamondCut,
address _init,
bytes calldata _calldata
) external;
}
contracts/libraries/LibDiamond.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/
import { IDiamond } from "../interfaces/IDiamond.sol";
import { IDiamondCut } from "../interfaces/IDiamondCut.sol";
// Remember to add the loupe functions from DiamondLoupeFacet to the diamond.
// The loupe functions are required by the EIP2535 Diamonds standard
error NoSelectorsGivenToAdd();
error NotContractOwner(address _user, address _contractOwner);
error NoSelectorsProvidedForFacetForCut(address _facetAddress);
error CannotAddSelectorsToZeroAddress(bytes4[] _selectors);
error NoBytecodeAtAddress(address _contractAddress, string _message);
error IncorrectFacetCutAction(uint8 _action);
error CannotAddFunctionToDiamondThatAlreadyExists(bytes4 _selector);
error CannotReplaceFunctionsFromFacetWithZeroAddress(bytes4[] _selectors);
error CannotReplaceImmutableFunction(bytes4 _selector);
error CannotReplaceFunctionWithTheSameFunctionFromTheSameFacet(
bytes4 _selector
);
error CannotReplaceFunctionThatDoesNotExists(bytes4 _selector);
error RemoveFacetAddressMustBeZeroAddress(address _facetAddress);
error CannotRemoveFunctionThatDoesNotExist(bytes4 _selector);
error CannotRemoveImmutableFunction(bytes4 _selector);
error InitializationFunctionReverted(
address _initializationContractAddress,
bytes _calldata
);
library LibDiamond {
bytes32 constant DIAMOND_STORAGE_POSITION =
keccak256("diamond.standard.diamond.storage");
struct FacetAddressAndSelectorPosition {
address facetAddress;
uint16 selectorPosition;
}
struct DiamondStorage {
// function selector => facet address and selector position in selectors array
mapping(bytes4 => FacetAddressAndSelectorPosition) facetAddressAndSelectorPosition;
bytes4[] selectors;
mapping(bytes4 => bool) supportedInterfaces;
// owner of the contract
address contractOwner;
}
function diamondStorage()
internal
pure
returns (DiamondStorage storage ds)
{
bytes32 position = DIAMOND_STORAGE_POSITION;
assembly {
ds.slot := position
}
}
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
function setContractOwner(address _newOwner) internal {
DiamondStorage storage ds = diamondStorage();
address previousOwner = ds.contractOwner;
ds.contractOwner = _newOwner;
emit OwnershipTransferred(previousOwner, _newOwner);
}
function contractOwner() internal view returns (address contractOwner_) {
contractOwner_ = diamondStorage().contractOwner;
}
function enforceIsContractOwner() internal view {
if (msg.sender != diamondStorage().contractOwner) {
revert NotContractOwner(msg.sender, diamondStorage().contractOwner);
}
}
event DiamondCut(
IDiamondCut.FacetCut[] _diamondCut,
address _init,
bytes _calldata
);
// Internal function version of diamondCut
function diamondCut(
IDiamondCut.FacetCut[] memory _diamondCut,
address _init,
bytes memory _calldata
) internal {
for (
uint256 facetIndex;
facetIndex < _diamondCut.length;
facetIndex++
) {
bytes4[] memory functionSelectors = _diamondCut[facetIndex]
.functionSelectors;
address facetAddress = _diamondCut[facetIndex].facetAddress;
if (functionSelectors.length == 0) {
revert NoSelectorsProvidedForFacetForCut(facetAddress);
}
IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;
if (action == IDiamond.FacetCutAction.Add) {
addFunctions(facetAddress, functionSelectors);
} else if (action == IDiamond.FacetCutAction.Replace) {
replaceFunctions(facetAddress, functionSelectors);
} else if (action == IDiamond.FacetCutAction.Remove) {
removeFunctions(facetAddress, functionSelectors);
} else {
revert IncorrectFacetCutAction(uint8(action));
}
}
emit DiamondCut(_diamondCut, _init, _calldata);
initializeDiamondCut(_init, _calldata);
}
function addFunctions(
address _facetAddress,
bytes4[] memory _functionSelectors
) internal {
if (_facetAddress == address(0)) {
revert CannotAddSelectorsToZeroAddress(_functionSelectors);
}
DiamondStorage storage ds = diamondStorage();
uint16 selectorCount = uint16(ds.selectors.length);
enforceHasContractCode(
_facetAddress,
"LibDiamondCut: Add facet has no code"
);
for (
uint256 selectorIndex;
selectorIndex < _functionSelectors.length;
selectorIndex++
) {
bytes4 selector = _functionSelectors[selectorIndex];
address oldFacetAddress = ds
.facetAddressAndSelectorPosition[selector]
.facetAddress;
if (oldFacetAddress != address(0)) {
revert CannotAddFunctionToDiamondThatAlreadyExists(selector);
}
ds.facetAddressAndSelectorPosition[
selector
] = FacetAddressAndSelectorPosition(_facetAddress, selectorCount);
ds.selectors.push(selector);
selectorCount++;
}
}
function replaceFunctions(
address _facetAddress,
bytes4[] memory _functionSelectors
) internal {
DiamondStorage storage ds = diamondStorage();
if (_facetAddress == address(0)) {
revert CannotReplaceFunctionsFromFacetWithZeroAddress(
_functionSelectors
);
}
enforceHasContractCode(
_facetAddress,
"LibDiamondCut: Replace facet has no code"
);
for (
uint256 selectorIndex;
selectorIndex < _functionSelectors.length;
selectorIndex++
) {
bytes4 selector = _functionSelectors[selectorIndex];
address oldFacetAddress = ds
.facetAddressAndSelectorPosition[selector]
.facetAddress;
// can't replace immutable functions -- functions defined directly in the diamond in this case
if (oldFacetAddress == address(this)) {
revert CannotReplaceImmutableFunction(selector);
}
if (oldFacetAddress == _facetAddress) {
revert CannotReplaceFunctionWithTheSameFunctionFromTheSameFacet(
selector
);
}
if (oldFacetAddress == address(0)) {
revert CannotReplaceFunctionThatDoesNotExists(selector);
}
// replace old facet address
ds
.facetAddressAndSelectorPosition[selector]
.facetAddress = _facetAddress;
}
}
function removeFunctions(
address _facetAddress,
bytes4[] memory _functionSelectors
) internal {
DiamondStorage storage ds = diamondStorage();
uint256 selectorCount = ds.selectors.length;
if (_facetAddress != address(0)) {
revert RemoveFacetAddressMustBeZeroAddress(_facetAddress);
}
for (
uint256 selectorIndex;
selectorIndex < _functionSelectors.length;
selectorIndex++
) {
bytes4 selector = _functionSelectors[selectorIndex];
FacetAddressAndSelectorPosition
memory oldFacetAddressAndSelectorPosition = ds
.facetAddressAndSelectorPosition[selector];
if (oldFacetAddressAndSelectorPosition.facetAddress == address(0)) {
revert CannotRemoveFunctionThatDoesNotExist(selector);
}
// can't remove immutable functions -- functions defined directly in the diamond
if (
oldFacetAddressAndSelectorPosition.facetAddress == address(this)
) {
revert CannotRemoveImmutableFunction(selector);
}
// replace selector with last selector
selectorCount--;
if (
oldFacetAddressAndSelectorPosition.selectorPosition !=
selectorCount
) {
bytes4 lastSelector = ds.selectors[selectorCount];
ds.selectors[
oldFacetAddressAndSelectorPosition.selectorPosition
] = lastSelector;
ds
.facetAddressAndSelectorPosition[lastSelector]
.selectorPosition = oldFacetAddressAndSelectorPosition
.selectorPosition;
}
// delete last selector
ds.selectors.pop();
delete ds.facetAddressAndSelectorPosition[selector];
}
}
function initializeDiamondCut(
address _init,
bytes memory _calldata
) internal {
if (_init == address(0)) {
return;
}
enforceHasContractCode(
_init,
"LibDiamondCut: _init address has no code"
);
(bool success, bytes memory error) = _init.delegatecall(_calldata);
if (!success) {
if (error.length > 0) {
// bubble up error
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(error)
revert(add(32, error), returndata_size)
}
} else {
revert InitializationFunctionReverted(_init, _calldata);
}
}
}
function enforceHasContractCode(
address _contract,
string memory _errorMessage
) internal view {
uint256 contractSize;
assembly {
contractSize := extcodesize(_contract)
}
if (contractSize == 0) {
revert NoBytecodeAtAddress(_contract, _errorMessage);
}
}
}
Contract ABI
[{"type":"error","name":"CannotAddFunctionToDiamondThatAlreadyExists","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"CannotAddSelectorsToZeroAddress","inputs":[{"type":"bytes4[]","name":"_selectors","internalType":"bytes4[]"}]},{"type":"error","name":"CannotRemoveFunctionThatDoesNotExist","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"CannotRemoveImmutableFunction","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"CannotReplaceFunctionThatDoesNotExists","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"CannotReplaceFunctionWithTheSameFunctionFromTheSameFacet","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"CannotReplaceFunctionsFromFacetWithZeroAddress","inputs":[{"type":"bytes4[]","name":"_selectors","internalType":"bytes4[]"}]},{"type":"error","name":"CannotReplaceImmutableFunction","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"error","name":"IncorrectFacetCutAction","inputs":[{"type":"uint8","name":"_action","internalType":"uint8"}]},{"type":"error","name":"InitializationFunctionReverted","inputs":[{"type":"address","name":"_initializationContractAddress","internalType":"address"},{"type":"bytes","name":"_calldata","internalType":"bytes"}]},{"type":"error","name":"NoBytecodeAtAddress","inputs":[{"type":"address","name":"_contractAddress","internalType":"address"},{"type":"string","name":"_message","internalType":"string"}]},{"type":"error","name":"NoSelectorsProvidedForFacetForCut","inputs":[{"type":"address","name":"_facetAddress","internalType":"address"}]},{"type":"error","name":"NotContractOwner","inputs":[{"type":"address","name":"_user","internalType":"address"},{"type":"address","name":"_contractOwner","internalType":"address"}]},{"type":"error","name":"RemoveFacetAddressMustBeZeroAddress","inputs":[{"type":"address","name":"_facetAddress","internalType":"address"}]},{"type":"event","name":"DiamondCut","inputs":[{"type":"tuple[]","name":"_diamondCut","internalType":"struct IDiamond.FacetCut[]","indexed":false,"components":[{"type":"address","name":"facetAddress","internalType":"address"},{"type":"uint8","name":"action","internalType":"enum IDiamond.FacetCutAction"},{"type":"bytes4[]","name":"functionSelectors","internalType":"bytes4[]"}]},{"type":"address","name":"_init","internalType":"address","indexed":false},{"type":"bytes","name":"_calldata","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"diamondCut","inputs":[{"type":"tuple[]","name":"_diamondCut","internalType":"struct IDiamond.FacetCut[]","components":[{"type":"address","name":"facetAddress","internalType":"address"},{"type":"uint8","name":"action","internalType":"enum IDiamond.FacetCutAction"},{"type":"bytes4[]","name":"functionSelectors","internalType":"bytes4[]"}]},{"type":"address","name":"_init","internalType":"address"},{"type":"bytes","name":"_calldata","internalType":"bytes"}]}]
Contract Creation Code
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