Merge branch 'master' of https://github.com/0xcert/ethereum-erc721 into expand-scope

# Conflicts:
#	README.md

Author: MoMannn

.github/workflows/node.js.yml

@@ -3,7 +3,7 @@
 
 name: Node.js CI
 
-on: push
+on: [push, pull_request]
 
 jobs:
   build:
@@ -20,3 +20,8 @@ jobs:
     - run: |
         npm ci
         npm run solhint && npm test
+        npm run coverage
+    - name: Codecov
+      uses: codecov/codecov-action@v2
+      with:
+        flags: unittests

.gitignore

@@ -2,4 +2,23 @@
 .vscode
 node_modules
 dist
-build
+build
+# Config files,
+.idea/
+.vscode
+# Node.js
+node_modules
+package.json
+package-lock.json
+#Hardhat files
+bin
+cache
+artifacts
+data/
+#Solidity
+soljson*
+.tmp*
+metadata/
+#coverage
+coverage.json
+coverage

BUG_BOUNTY.md

@@ -79,7 +79,7 @@ How to win:
 
 - Be descriptive and detailed when describing your issue
 - Fix it — recommend a way to solve the problem
-- Include a [Specron test](https://specron.github.io/framework/) case that we can reproduce
+- Include a [Hardhat test](https://hardhat.org/) case that we can reproduce
 
 Rules for bounty sponsor:
 

README.md

@@ -1,10 +1,11 @@
-![Build Status](https://travis-ci.org/0xcert/ethereum-erc721.svg?branch=master) [![NPM Version](https://badge.fury.io/js/@0xcert%2Fethereum-erc721.svg)](https://www.npmjs.com/package/@0xcert/ethereum-erc721) [![Dependencies Status](https://david-dm.org/0xcert/ethereum-erc721.svg)](https://david-dm.org/0xcert/ethereum-erc721) [![Bug Bounty](https://img.shields.io/badge/bounty-open-2930e8.svg)](https://github.com/0xcert/ethereum-erc721/blob/master/BUG_BOUNTY.md)
+![Build Status](https://travis-ci.org/0xcert/ethereum-erc721.svg?branch=master) [![codecov](https://codecov.io/gh/0xcert/ethereum-erc721/branch/master/graph/badge.svg?token=F0tgRHyWSM)](https://codecov.io/gh/0xcert/ethereum-erc721) [![NPM Version](https://badge.fury.io/js/@0xcert%2Fethereum-erc721.svg)](https://www.npmjs.com/package/@0xcert/ethereum-erc721) [![Dependencies Status](https://david-dm.org/0xcert/ethereum-erc721.svg)](https://david-dm.org/0xcert/ethereum-erc721) [![Bug Bounty](https://img.shields.io/badge/bounty-open-2930e8.svg)](https://github.com/0xcert/ethereum-erc721/blob/master/BUG_BOUNTY.md)
 
 # ERC-721 Token — Reference Implementation
 
-This is the complete reference implementation of the [ERC-721](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md) non-fungible token standard for the Ethereum and Wanchain blockchains. It is also compatible with other EVM compatible chains like Binance Smart Chain (BSC), Avalanche (AVAX) etc. This is an open-source project, complete with [Specron](https://specron.github.io/framework/) testing.
+This is the complete reference implementation of the [ERC-721](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md) non-fungible token standard for the Ethereum and Wanchain blockchains. It is also compatible with other EVM compatible chains like Binance Smart Chain (BSC), Avalanche (AVAX) etc. This is an open-source project, complete with [Hardhat](https://hardhat.org/) testing.
 
 The purpose of this implementation is to provide a good starting point for anyone who wants to use and develop non-fungible tokens on the Ethereum and Wanchain blockchains. Instead of re-implementing the ERC-721 yourself you can use this code which has gone through multiple audits and we hope it will be extensively used by the community in the future.
+Note that this implementation is more restrictive then the ERC-721 standard since it does not support `payable` function calls out of the box. You are however free to add this yourself.
 
 If you are looking for a more feature-rich and advanced ERC721 implementation, then check out the [0xcert Framework](https://github.com/0xcert/framework).
 

hardhat.config.js

@@ -0,0 +1,25 @@
+require('@nomiclabs/hardhat-waffle');
+require('hardhat-abi-exporter');
+require('solidity-coverage');
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+module.exports = {
+  solidity: '0.8.6',
+  networks: {
+    hardhat: {
+      initialBaseFeePerGas: 0 // hardhat london fork error fix for coverage
+    }
+  },
+  paths: {
+    sources: './src/*',
+    artifacts: './build',
+    tests: './src/tests/*'
+  },
+  abiExporter: {
+    path: './data/abi',
+    clear: true,
+    flat: true,
+  }
+};