critesjosh

pragma solidity ^0.5.0;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721MetadataMintable.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721Enumerable.sol";

contract Cert721 is ERC721MetadataMintable, ERC721Enumerable {
    
    constructor (string memory name, string memory symbol) 
        public 
        ERC721Metadata(name, symbol) 

critesjosh

{
  "description": "This token certifies the holder as a graduate of the Devcon V Scholars program.", 
  "image": "https://i.ibb.co/mFz0Zjh/deva2019b-2.png", 
  "name": "Devcon V Scholar NFT",
  "external_url": "https://medium.com/ethereum-foundation-devcon-scholars"
}

critesjosh

[
	{
		"constant": false,
		"inputs": [
			{
				"internalType": "address",
				"name": "account",
				"type": "address"
			}
		],

critesjosh

pragma solidity ^0.5.0; // Step 1

contract ProjectSubmission { // Step 1

    address owner; // Step 1 (state variable)
    uint ownerBalance;  // Step 4 (state variable)
    
    modifier onlyOwner() { // Step 1
      require(msg.sender == owner, "Only the owner can do this.");
      _;

critesjosh

pragma solidity >=0.4.0 <0.7.0;

// Rinkeby address: 0x49Bb098E781eD5C50D85E82d85cbA1a6F03FD3e6

contract SimpleStorage {
    uint storedData;
    
    event storageUpdate(uint newValue, address updatedBy);

    function set(uint x) public {

critesjosh

/*
    This exercise has been updated to use Solidity version 0.5
    Breaking changes from 0.4 to 0.5 can be found here: 
    https://solidity.readthedocs.io/en/v0.5.0/050-breaking-changes.html
    
    Reference Docs: https://solidity.readthedocs.io/en/latest/index.html
*/

pragma solidity ^0.5.0;

critesjosh

// Run this script in a npm project with contractkit installed
// https://www.npmjs.com/package/@celo/contractkit

const Kit = require('@celo/contractkit')
const CeloContract = Kit.CeloContract
const kit = Kit.newKit('http://localhost:8545')

async function wrapper(){

    let accounts = await kit.web3.eth.getAccounts()

critesjosh

// Import ContractKit
const ContractKit = require('@celo/contractkit')

// Create a new instance of ContractKit, connecting to a local Celo node
//const contractKit = ContractKit.newKit('http://localhost:8545')
const contractKit = ContractKit.newKit('https://alfajores-forno.celo-testnet.org')

// Specify an arbitrary recipient of the transaction
const recipient = '0xB9727f7f1e1f4a5229a49E260fBBBD410d10f2Ff'
const privateKey = '3a26ebc37944c305670a21ea6a5d16c1084db2f18bc6635ba95f487e5c59868f'

critesjosh

// API call: 
// https://explorer.celo.org/api?module=transaction&action=gettxinfo&txhash=0xc495463ca93ec63fa654cc12690db488a9b127221a21af4c6359ceb357f3d757
{
  "status": "1",
  "result": {
    "value": "0",
    "to": "0x6d67b41236129cb4f6ffaf6e37223485b20d1d06",
    "timeStamp": "1610353070",
    "success": true,
    "next_page_params": null,

critesjosh

const Web3 = require("web3")
const ContractKit = require('@celo/contractkit')
const web3 = new Web3('https://forno.celo.org')
const kit = ContractKit.newKitFromWeb3(web3)

let anAddress = '0xD86518b29BB52a5DAC5991eACf09481CE4B0710d'

async function signTx(){

  let goldtoken = await kit.contracts.getGoldToken()