Part 2/4 in a series on collateralizing ERC721s for loans on Dharma Protocol

createERC721DebtOrder.js

/*********************
 *  Setup Dharma.js  *
 *********************/

// Import Dharma from Dharma.js
import Dharma from "@dharmaprotocol/dharma.js";

// Import BigNumber.js version 5.0.0, which we will use when posting numbers to the blockchain.
import * as BigNumber from "bignumber.js";

// Instantiate Dharma
const dharma = new Dharma();

/***********************
 *  Create Debt Order  *
 ***********************/

const DEBTOR_ADDRESS = "0x601e6e7711b9e3b1b20e1e8016038a32dfc86ddd";

/*
 * We will refer to our token using its index in the ERC721 contract. It's also possible to
 * use the token's ID, in case the contract does not implement the standard
 * Enumerable Extension (see https://eips.ethereum.org/EIPS/eip-721)
 */
const tokenReference = new BigNumber(0);
// We specify that the token implements the Enumerable Extension.
const isEnumerable = true;
// The symbol for our "Mintable ERC721 Token" that is registered in Dharma's ERC721 Token Registry.
const erc721Symbol = "MET";

// We define the data to create our debt order.
const debtOrderData = {
    principalAmount: new BigNumber(1),
    principalTokenSymbol: "REP",
    interestRate: new BigNumber(1),
    amortizationUnit: "days",
    termLength: new BigNumber(5),
    debtor: DEBTOR_ADDRESS,
    isEnumerable,
    erc721Symbol,
    tokenReference,
};

// We define the adapter that we will use to create the debt order.
const adapter = dharma.adapters.erc721CollateralizedSimpleInterestLoan;

// We create an order using the information we just defined.
adapter.toDebtOrder(debtOrderData).then(async (order) => {
    // Sign the debt order.
    console.log("Please approve the request to sign the debt order.");
    order.debtorSignature = await dharma.sign.asDebtor(order, false);

    // Let's inspect the signed debt order:
    console.log("The order has been signed, as follows:");
    console.log(order);
});