BlockList implemented - Version 1.0.0

.gitattributes

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+*.sol linguist-language=Solidity
+*.vy linguist-language=Python

.gitignore

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+__pycache__
+.env
+.history
+.hypothesis/
+build/
+reports/

LICENSE

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README.md

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+# Transient Labs BlockList
+BlockList is a smart contract utility that can be utilized to block approvals of marketplaces that creators didn't want their work trading on
+
+## 1. Problem Statement
+It's a race to zero in terms of marketplace fees, but in an effort to keep cash flow, some marketplaces have decided forego creator feeds. This hurts creators an incredible amount and we believe that creators should have the option to block having their art listed on these platforms.
+
+## 2. Our Solution
+This is why we created BlockList. The `BlockList.sol` contract can be inherited by nft contracts and the modifier `notBlocked(address)` can be used on `setApprovalForAll` and `approve` functions in ERC-721 and/or ERC-1155 contracts. We have included a sample implementation of both in this repo.
+
+Theoretically, this modifier could be applied to other functions, but we HIGHLY advise against this. Applying this logic to transfer functions introduces slight vulnerabilties that should be avoided. 
+
+To implement the `BlockList.sol` contract, please make sure to add a function to the inheriting contract that can call the internal `_setBlockListStatus` function.
+
+## License
+This code is copyright Transient Labs, Inc 2022 and is licensed under the Apache-2.0 license. The name "Story Contract" is also copyrighted by Transient Labs, Inc.

brownie-config.yaml

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+dotenv: .env
+
+project_structure:
+    build: build
+    contracts: contracts
+    interfaces: interfaces
+    reports: reports
+    scripts: scripts
+    tests: tests
+
+networks:
+    default: development
+    development:
+        gas_limit: max
+        gas_buffer: 1
+        gas_price: 0
+        max_fee: null
+        priority_fee: null
+        reverting_tx_gas_limit: max
+        default_contract_owner: true
+        cmd_settings: null
+    live:
+        gas_limit: auto
+        gas_buffer: 1.1
+        gas_price: auto
+        max_fee: null
+        priority_fee: null
+        reverting_tx_gas_limit: false
+        default_contract_owner: false
+
+compiler:
+    evm_version: null
+    solc:
+        version: null
+        optimizer:
+            enabled: true
+            runs: 500
+        remappings: null
+    vyper:
+        version: null
+
+console:
+    show_colors: true
+    color_style: monokai
+    auto_suggest: true
+    completions: true
+    editing_mode: emacs
+
+reports:
+    exclude_paths: null
+    exclude_contracts: null
+    only_include_project: true
+
+hypothesis:
+    deadline: null
+    max_examples: 50
+    report_multiple_bugs: False
+    stateful_step_count: 10
+    phases:
+        explicit: true
+        reuse: true
+        generate: true
+        target: true
+        shrink: true
+
+autofetch_sources: false
+dependencies: null
+dev_deployment_artifacts: false

contracts/BlockList.sol

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+// SPDX-License-Identifier: Apache-2.0
+
+/// @title BlockList
+/// @author transientlabs.xyz
+
+/**
+    ____        _ __    __   ____  _ ________                     __ 
+   / __ )__  __(_) /___/ /  / __ \(_) __/ __/__  ________  ____  / /_
+  / __  / / / / / / __  /  / / / / / /_/ /_/ _ \/ ___/ _ \/ __ \/ __/
+ / /_/ / /_/ / / / /_/ /  / /_/ / / __/ __/  __/ /  /  __/ / / / /_  
+/_____/\__,_/_/_/\__,_/  /_____/_/_/ /_/  \___/_/   \___/_/ /_/\__/  
+                                                                     
+  ______                      _            __     __          __        
+ /_  __/________ _____  _____(_)__  ____  / /_   / /   ____ _/ /_  _____
+  / / / ___/ __ `/ __ \/ ___/ / _ \/ __ \/ __/  / /   / __ `/ __ \/ ___/
+ / / / /  / /_/ / / / (__  ) /  __/ / / / /_   / /___/ /_/ / /_/ (__  ) 
+/_/ /_/   \__,_/_/ /_/____/_/\___/_/ /_/\__/  /_____/\__,_/_.___/____/  
+                                                                        
+*/
+
+pragma solidity 0.8.17;
+
+abstract contract BlockList {
+
+    //================= State Variables =================//
+    mapping(address => bool) private _blockList;
+
+    //================= Events =================//
+    event BlockListStatusChange(address indexed operator, bool indexed status);
+
+    //================= Modifier =================//
+    /// @dev modifier that can be applied to approval functions in order to block listings on marketplaces
+    modifier notBlocked(address operator) {
+        require(!_blockList[operator], "BlockList: operator is blocked");
+        _;
+    }
+
+    //================= View Function =================//
+    /// @dev function to get blocklist status with True meaning that the operator is blocked
+    function getBlockListStatus(address operator) public view returns (bool) {
+        return _blockList[operator];
+    }
+
+    //================= Setter Function =================//
+    /// @notice internal function to set the block list status
+    /// @dev inheriting contracts must implement a function that can call this one
+    function _setBlockListStatus(address operator, bool status) internal {
+        _blockList[operator] = status;
+        emit BlockListStatusChange(operator, status);
+    }
+
+}

contracts/examples/ERC1155BlockList.sol

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+// SPDX-License-Identifier: Apache-2.0
+
+/// @title ERC1155BlockList
+/// @author transientlabs.xyz
+
+pragma solidity 0.8.17;
+
+import "OpenZeppelin/openzeppelin-contracts@4.7.3/contracts/token/ERC1155/ERC1155.sol";
+import "OpenZeppelin/openzeppelin-contracts@4.7.3/contracts/access/Ownable.sol";
+import "../BlockList.sol";
+
+contract ERC1155BlockList is ERC1155, Ownable, BlockList {
+
+    //================= State Variables =================//
+    uint256 private _counter;
+
+    //================= Constructor =================//
+    constructor() ERC1155("") Ownable() {}
+
+    //================= Mint =================//
+    function mint(uint256 numToMint) external onlyOwner {
+        _counter++;
+        _mint(msg.sender, _counter, numToMint, "");
+    }
+
+    //================= BlockList =================//
+    function setBlockListStatus(address operator, bool status) external onlyOwner {
+        _setBlockListStatus(operator, status);
+    }
+
+    //================= Overrides =================//
+    function setApprovalForAll(address operator, bool approved) public virtual override(ERC1155) notBlocked(operator) {
+        ERC1155.setApprovalForAll(operator, approved);
+    }
+}