example.js

"use strict";

const Web3 = require("web3");
const moment = require("moment");

const Mapper = require("./");

function bNToString(val) {
	return Web3.utils.BN(val).toString();
}

const mapper = new Mapper({
	mapping: {
		state: [
			{
				key: "stateName",
				transform: function (val) {
					const index = Number(val.toString());
					const states = ["Funding", "Active", "Matured"];
					return states[index];
				},
			},
			{
				key: "state",
				transform: val => val.toNumber(),
			},
		],
		maturityDeadline: {
			transform: function (val) {
				return moment.unix(val.toNumber());
			},
		},
	},
	types: {
		bytes: Web3.utils.hexToUtf8,
		int: bNToString,
		uint: bNToString,
	},
	workingDirectory: __dirname,
});

(async () => {
	try {
		const values = await mapper.map("Token", "0x468d834b0FAc4B9D8B2E90bE1cE35A891Ff96Ae9");
		console.log(values);
	} catch (err) {
		console.error(err);
	}
})();