example-referral.js

"use strict";

/**
 * Example JavaScript code that interacts with the page and Web3 wallets
 */

// Unpkg imports
const Web3Modal = window.Web3Modal.default;
const WalletConnectProvider = window.WalletConnectProvider.default;
const Fortmatic = window.Fortmatic;
const evmChains = window.evmChains;

// Web3modal instance
let web3Modal

// Chosen wallet provider given by the dialog window
let provider;

// Address of the selected account
let selectedAccount;

const abi = [
	{
		"inputs": [],
		"stateMutability": "nonpayable",
		"type": "constructor"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "approved",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Approval",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"indexed": false,
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "ApprovalForAll",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": false,
				"internalType": "address",
				"name": "burner",
				"type": "address"
			},
			{
				"indexed": false,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Burn",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Transfer",
		"type": "event"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "approve",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			}
		],
		"name": "balanceOf",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "burn",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "endContract",
		"outputs": [],
		"stateMutability": "payable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "getApproved",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			}
		],
		"name": "isApprovedForAll",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "mintUsingSequentialTokenId",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "name",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "ownerOf",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			},
			{
				"internalType": "bytes",
				"name": "_data",
				"type": "bytes"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "setApprovalForAll",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "bytes4",
				"name": "interfaceId",
				"type": "bytes4"
			}
		],
		"name": "supportsInterface",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "pure",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "symbol",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "tokenURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "transferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	}
];

const doorAbi = [
	{
		"inputs": [],
		"stateMutability": "nonpayable",
		"type": "constructor"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "approved",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Approval",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"indexed": false,
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "ApprovalForAll",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": false,
				"internalType": "string",
				"name": "newScriptURI",
				"type": "string"
			}
		],
		"name": "ScriptUpdate",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Transfer",
		"type": "event"
	},
	{
		"inputs": [],
		"name": "_tokenIdCounter",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "_value",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "approve",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			}
		],
		"name": "balanceOf",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "burnToken",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "contractURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "pure",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "getApproved",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			}
		],
		"name": "isApprovedForAll",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "mintUsingSequentialTokenId",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "name",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "ownerOf",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "owners",
		"outputs": [
			{
				"internalType": "address[]",
				"name": "",
				"type": "address[]"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			},
			{
				"internalType": "bytes",
				"name": "_data",
				"type": "bytes"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "scriptURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "setApprovalForAll",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "bytes4",
				"name": "interfaceId",
				"type": "bytes4"
			}
		],
		"name": "supportsInterface",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "symbol",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "tokenURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "transferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "string",
				"name": "newScriptURI",
				"type": "string"
			}
		],
		"name": "updateScriptURI",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	}
];

const TSabi = [
	{
		"inputs": [],
		"stateMutability": "nonpayable",
		"type": "constructor"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "approved",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Approval",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"indexed": false,
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "ApprovalForAll",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "previousOwner",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "newOwner",
				"type": "address"
			}
		],
		"name": "OwnershipTransferred",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": false,
				"internalType": "string",
				"name": "newScriptURI",
				"type": "string"
			}
		],
		"name": "ScriptUpdate",
		"type": "event"
	},
	{
		"anonymous": false,
		"inputs": [
			{
				"indexed": true,
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"indexed": true,
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "Transfer",
		"type": "event"
	},
	{
		"inputs": [],
		"name": "_tokenIdCounter",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "_value",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "approve",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			}
		],
		"name": "balanceOf",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "burnToken",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "contractURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "pure",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "getApproved",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			}
		],
		"name": "isApprovedForAll",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "mintUsingSequentialTokenId",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "name",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "owner",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "ownerOf",
		"outputs": [
			{
				"internalType": "address",
				"name": "",
				"type": "address"
			}
		],
		"stateMutability": "view",
		"type": "function"
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	{
		"inputs": [],
		"name": "renounceOwnership",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			},
			{
				"internalType": "bytes",
				"name": "_data",
				"type": "bytes"
			}
		],
		"name": "safeTransferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "scriptURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "selfDestruct",
		"outputs": [],
		"stateMutability": "payable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "operator",
				"type": "address"
			},
			{
				"internalType": "bool",
				"name": "approved",
				"type": "bool"
			}
		],
		"name": "setApprovalForAll",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "string",
				"name": "newTokenURI",
				"type": "string"
			}
		],
		"name": "setTokenURI",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "bytes4",
				"name": "interfaceId",
				"type": "bytes4"
			}
		],
		"name": "supportsInterface",
		"outputs": [
			{
				"internalType": "bool",
				"name": "",
				"type": "bool"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "symbol",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "index",
				"type": "uint256"
			}
		],
		"name": "tokenByIndex",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "owner",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "index",
				"type": "uint256"
			}
		],
		"name": "tokenOfOwnerByIndex",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "tokenURI",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
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	{
		"inputs": [],
		"name": "totalSupply",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "from",
				"type": "address"
			},
			{
				"internalType": "address",
				"name": "to",
				"type": "address"
			},
			{
				"internalType": "uint256",
				"name": "tokenId",
				"type": "uint256"
			}
		],
		"name": "transferFrom",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "newOwner",
				"type": "address"
			}
		],
		"name": "transferOwnership",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "string",
				"name": "newScriptURI",
				"type": "string"
			}
		],
		"name": "updateScriptURI",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	}
];

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	function hexToBytes(hex) {
		for (var bytes = [], c = 0; c < hex.length; c += 2)
			bytes.push(parseInt(hex.substr(c, 2), 16));
		return bytes;
	}

async function calcContractAddress(web3, fromAccount) {
	//get next nonce
	const nonce = await web3.eth.getTransactionCount(fromAccount);

	var nonceStr = nonce.toString(16);

	if ((nonceStr.length % 2) == 1)
	{
		nonceStr = "0" + nonceStr;
	}

	var input_arr4 = [ fromAccount.toLowerCase(), "0x" + nonceStr ];
	var rlp_encoded = ethers.utils.RLP.encode(input_arr4); 
	var rlp2 = hexToBytes(rlp_encoded.substring(2));

	var contract_address_long = ethers.utils.keccak256(rlp2);

	var contract_address = contract_address_long.substring(26); //Trim the first 24 characters + 0x.
	return "0x" + contract_address;
}

/**
 * Setup the orchestra
 */
function init() {

	console.log("Initializing example");
	console.log("WalletConnectProvider is", WalletConnectProvider);
	console.log("Fortmatic is", Fortmatic);
	console.log("window.web3 is", window.web3, "window.ethereum is", window.ethereum);
	document.querySelector("#btn-disconnect").setAttribute("disabled", "disabled");

	document.querySelector("#btn-disconnect").style.display = "enabled";
	//document.querySelector("#connected").style.display = "block";

	// Check that the web page is run in a secure context,
	// as otherwise MetaMask won't be available
	/*if(location.protocol !== 'https:') {
	  // https://ethereum.stackexchange.com/a/62217/620
	  const alert = document.querySelector("#alert-error-https");
	  alert.style.display = "block";
	  document.querySelector("#btn-connect").setAttribute("disabled", "disabled")
	  return;
	}*/

	// Tell Web3modal what providers we have available.
	// Built-in web browser provider (only one can exist as a time)
	// like MetaMask, Brave or Opera is added automatically by Web3modal
	const bridge = "https://bridge.walletconnect.org/";

	const providerOptions = {
		walletconnect: {
			package: WalletConnectProvider,
			options: {
				//Old, free AW Infura key; leaked many times - you will want to replace this with your own, but it might just work
				infuraId: "c7df4c29472d4d54a39f7aa78f146853",
				rpc: {
					5: "https://goerli.infura.io/v3/c7df4c29472d4d54a39f7aa78f146853",
				}
			}
		}
	};

	web3Modal = new Web3Modal({
		chainId: 5,
		network: "goerli", // optional
		cacheProvider: false, // optional
		disableInjectedProvider: false,
		providerOptions: providerOptions // required
	});

	console.log("Web3Modal instance is", web3Modal);
}


/**
 * Kick in the UI action after Web3modal dialog has chosen a provider
 */
async function fetchAccountData() {

	// Get a Web3 instance for the wallet
	const web3 = new Web3(provider);

	console.log("Web3 instance is", web3);


	// Get connected chain id from Ethereum node
	const chainId = await web3.eth.getChainId();
	// Load chain information over an HTTP API
	const chainData = evmChains.getChain(chainId);
	document.querySelector("#network-name").textContent = chainData.name;

	// Get list of accounts of the connected wallet
	const accounts = await web3.eth.getAccounts();

	let web3Provider = web3._provider;

	if (web3Provider.isWalletConnect) {
		let walletMeta = web3Provider.walletMeta;
		if (walletMeta != null) {
			document.querySelector("#detected-wallet").textContent = walletMeta.name;
		}
		else {
			document.querySelector("#detected-wallet").textContent = "Unknown WalletConnect provider";
		}
	}
	else if (web3Provider.isAlphaWallet) {
		document.querySelector("#detected-wallet").textContent = "Alpha Wallet";
	}
	else if (web3Provider.isTrust) {
		document.querySelector("#detected-wallet").textContent = "Trust Wallet";
	}
	else if (web3Provider.isMetaMask) {
		document.querySelector("#detected-wallet").textContent = "MetaMask";
	}

	// MetaMask does not give you all accounts, only the selected account
	console.log("Got accounts", accounts);
	selectedAccount = accounts[0];
	document.querySelector("#selected-account").textContent = selectedAccount;

	// Get a handl
	const template = document.querySelector("#template-balance");
	const accountContainer = document.querySelector("#accounts");

	// Purge UI elements any previously loaded accounts
	accountContainer.innerHTML = '';

	// Go through all accounts and get their ETH balance
	const rowResolvers = accounts.map(async (address) => {
		const balance = await web3.eth.getBalance(address);
		// ethBalance is a BigNumber instance
		// https://github.com/indutny/bn.js/
		const ethBalance = web3.utils.fromWei(balance, "ether");
		const humanFriendlyBalance = parseFloat(ethBalance).toFixed(4);
		// Fill in the templated row and put in the document
		const clone = template.content.cloneNode(true);
		clone.querySelector(".address").textContent = address;
		clone.querySelector(".balance").textContent = humanFriendlyBalance;
		const nextContractAddr = await calcContractAddress(web3, address);
		clone.querySelector(".contractAddr").textContent = "Next Contract Addr: " + nextContractAddr;
		accountContainer.appendChild(clone);
	});

	// Because rendering account does its own RPC commucation
	// with Ethereum node, we do not want to display any results
	// until data for all accounts is loaded
	await Promise.all(rowResolvers);

	// Display fully loaded UI for wallet data
	document.querySelector("#prepare").style.display = "none";
	document.querySelector("#connected").style.display = "block";
}



/**
 * Fetch account data for UI when
 * - User switches accounts in wallet
 * - User switches networks in wallet
 * - User connects wallet initially
 */
async function refreshAccountData() {

	// If any current data is displayed when
	// the user is switching acounts in the wallet
	// immediate hide this data
	document.querySelector("#connected").style.display = "none";
	document.querySelector("#prepare").style.display = "block";

	// Disable button while UI is loading.
	// fetchAccountData() will take a while as it communicates
	// with Ethereum node via JSON-RPC and loads chain data
	// over an API call.
	document.querySelector("#btn-connect").setAttribute("disabled", "disabled")
	await fetchAccountData(provider);
	document.querySelector("#btn-connect").removeAttribute("disabled")
	document.querySelector("#btn-disconnect").removeAttribute("disabled")
}


/**
 * Connect wallet button pressed.
 */
async function onConnect() {

	console.log("Opening a dialog", web3Modal);
	try {
		provider = await web3Modal.connect();
	} catch (e) {
		console.log("Could not get a wallet connection", e);
		return;
	}

	// Subscribe to accounts change
	provider.on("accountsChanged", (accounts) => {
		fetchAccountData();
	});

	// Subscribe to chainId change
	provider.on("chainChanged", (chainId) => {
		fetchAccountData();
	});

	// Subscribe to networkId change
	provider.on("networkChanged", (networkId) => {
		fetchAccountData();
	});

	await refreshAccountData();
}

/**
 * Disconnect wallet button pressed.
 */
async function onDisconnect() {

	console.log("Killing the wallet connection", provider);

	// TODO: Which providers have close method?
	if (provider != null && provider.close) {
		await provider.close();

		// If the cached provider is not cleared,
		// WalletConnect will default to the existing session
		// and does not allow to re-scan the QR code with a new wallet.
		// Depending on your use case you may want or want not his behavir.
		provider = null;
	}

	await web3Modal.clearCachedProvider();

	selectedAccount = null;

	// Set the UI back to the initial state
	document.querySelector("#prepare").style.display = "block";
	document.querySelector("#connected").style.display = "none";
}

function hexToBytes(hex) {
	for (var bytes = [], c = 0; c < hex.length; c += 2)
		bytes.push(parseInt(hex.substr(c, 2), 16));
	return bytes;
}


async function onPushTS721() {
	console.log("Push TS721");
	const providerNew = new ethers.providers.Web3Provider(provider); console.log('providernew:', providerNew);
	
	let factory = new ethers.ContractFactory(TSabi, hexToBytes(byteCodeTS721), providerNew.getSigner());
	
    let contract = factory.attach("0x8c36A92536784A5C59E28311c0961Ed06e9Bca5d");

	let txHash = await contract.mintUsingSequentialTokenId();

	console.log("Data:", txHash);
}

async function onSwitch2Polygon() {
	console.log("onSwitch2Polygon: ")
	let request = {
		method: "wallet_switchEthereumChain",
		params: [{ chainId: "0x3E9" }]
	}

	const response = provider.request(request);
	response.then(
		function (value) { console.log("success: " + value) },
		function (error) { console.log("error: " + error) }
	)
	console.log("response: " + response);
}

async function onSwitch2Aurora() {
	console.log("onSwitch2Aurora: ")
	let request = {
		method: "wallet_switchEthereumChain",
		params: [{ chainId: "0x4E454153" }]
	}

	const response = provider.request(request);
	response.then(
		function (value) { console.log("success: " + value) },
		function (error) { console.log("error: " + error) }
	)
	console.log("response: " + response);
}

async function onSwitch2ADA() {
	console.log("onSwitch2ADA: ")
	let request = {
		method: "wallet_switchEthereumChain",
		params: [{ chainId: "0x30DA5" }]
	}

	const response = provider.request(request);
	response.then(
		function (value) { console.log("success: " + value) },
		function (error) { console.log("error: " + error) }
	)
	console.log("response: " + response);
}

async function onAddChain() {
	console.log("onAddChain")
	let chainid = "0x345"
	let request = {
		method: "wallet_addEthereumChain",
		params: [{
			chainId: chainid, // A 0x-prefixed hexadecimal string
			chainName: "TestChain",
			nativeCurrency: {
				name: "tstToken",
				symbol: "TST", // 2-6 characters long
				decimals: 6,
			},
			rpcUrls: [""],
			blockExplorerUrls: [""],
			iconUrls: [], // Currently ignored.
		}]
	}

	provider.request(request)
		.then
		(
			function (value) { console.log("success: " + value) },
			function (error) { console.log("error: " + error) }
		)
}

/**
 * Main entry point.
 */
window.addEventListener('load', async () => {
	init();
	document.querySelector("#btn-connect").addEventListener("click", onConnect);
	document.querySelector("#btn-disconnect").addEventListener("click", onDisconnect);
	document.querySelector("#btn-disconnect2").addEventListener("click", onDisconnect);
	document.querySelector("#btn-pushTS721").addEventListener("click", onPushTS721);

});