Git Source Author: @oscarsernarosero, built on top of Nick Mudge implementation. Contract serves as library for the Processor Diamond Library contract of the diamond pattern. Responsible for checking on rules compliance.

​
State Variables

​
DIAMOND_CUT_STORAGE

bytes32 constant DIAMOND_CUT_STORAGE = bytes32(uint256(keccak256("diamond-cut.storage")) - 1);

​
RULE_DATA_POSITION

bytes32 constant RULE_DATA_POSITION = keccak256("nontagged-ruless.rule-data.storage");

​
Functions

​
s

Function for position of facets and their selectors. Every facet has its own storage. 
function s() internal pure returns (RuleProcessorDiamondStorage storage ds);
Returns
NameTypeDescription
dsRuleProcessorDiamondStorageData storage for Rule Processor Facet Storage

​
ruleDataStorage

Function to store rules 
function ruleDataStorage() internal pure returns (RuleDataStorage storage ds);
Returns
NameTypeDescription
dsRuleDataStorageData Storage of Rule Data Storage

​
diamondCut

Internal function version of _diamondCut 
function diamondCut(FacetCut[] memory _diamondCut, address init, bytes memory data) internal;
Parameters
NameTypeDescription
_diamondCutFacetCut[]Facets Array
initaddressAddress of the contract or facet to execute “data”
databytesA function call, including function selector and arguments calldata is executed with delegatecall on “init”

​
addFunctions

Add Function to Diamond 
function addFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal;
Parameters
NameTypeDescription
_facetAddressaddressAddress of Facet
_functionSelectorsbytes4[]Signature array of function selectors

​
replaceFunctions

Replace Function from Diamond 
function replaceFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal;
Parameters
NameTypeDescription
_facetAddressaddressAddress of Facet
_functionSelectorsbytes4[]Signature array of function selectors

​
removeFunctions

can’t replace immutable functions — functions defined directly in the diamond in this case replace old facet address Remove Function from Diamond 
function removeFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal;
Parameters
NameTypeDescription
_facetAddressaddressAddress of Facet
_functionSelectorsbytes4[]Signature array of function selectors

​
initializeDiamondCut

can’t remove immutable functions — functions defined directly in the diamond replace selector with last selector delete last selector Initialize Diamond Cut of new Facet 
function initializeDiamondCut(address init, bytes memory data) internal;
Parameters
NameTypeDescription
initaddressThe address of the contract or facet to execute “data”
databytesA function call, including function selector and arguments calldata is executed with delegatecall on “init”

​
enforceHasContractCode

Internal function to enforce contract has code 
function enforceHasContractCode(address _contract, string memory _errorMessage) internal view;
Parameters
NameTypeDescription
_contractaddressThe address of the contract be checked or enforced
_errorMessagestringError for contract with non matching co

​
Events

​
DiamondCut

event DiamondCut(FacetCut[] _diamondCut, address init, bytes data);