0xcert Docs

# Issue asset

It this guide we we will issue a new asset (to ourselfs) on an existing asset ledger.

Live example

Click here to check the live example for this section. There are multiple actions in this example.

# Prerequisites

In this guide, we will assume you have gone through the Asset ledger deployment guide and have deployed an asset ledger. You will also need a MetaMask account with some credits.

# Usage overview

We begin by importing the client modules.

import { ActionCreateAsset, ActionKind, Client, Priority } from "@0xcert/client";

Before we can start issuing assets we must initialize our client first.

const client = new Client({
  provider,
  apiUrl: 'https://api.0xcert.org',
});
await client.init();

WARNING

For successful client initialization you need connected 0xcert framework provider instance. See Providers chapter for detailed instructions. Your provider must be connected to Rinkeby Ethereum test network.

Once client is initialized, we define our create asset action.

const actionCreateAsset: ActionCreateAsset = {
  kind: ActionKind.CREATE_ASSET,
  assetLedgerId: ledger.id,
  senderId: provider.accountId,
  receiverId: provider.accountId,
  id: '100',
  imprint: 'd747e6ffd1aa3f83efef2931e3cc22c653ea97a32c1ee7289e4966b6964ecdfb',
};

To create a new asset we need to generate its imprint. You can learn more about generating imprints in the Certification guide. As assetLedgerId we must provide the ID of our newly deployed asset ledger from guide Asset ledger deployment or any other deployed ledger. As senderId we set provider.accountId, which means that we will be signing asset creation order. We set the asset's id to 100, and for the receiverId, we set provider.accountId, which means we are creating asset for ourselves.

TIP

The provider.accountId is your currently selected provider account. If you want someone else to be the receiver, enter their account address instead.

TIP

The account address set as senderId must have the ability to sign an asset creation order.

After we defined our create asset action, it's time to define our order which will perform the defined action.

const order = {
  signersIds: [
    provider.accountId
  ],
  actions: [
    actionCreateAsset,
  ],
  wildcardSigner: false,
  automatedPerform: true,
  payerId: provider.accountId,
};

Order must be signed by all of the accounts specified in signersIds array. In our case, we are creating asset for ourself, so we are the only signer of the order. We add our defined crete asset action in actions array. There can be multiple different actions present in one order and they will be atomically performed. If wildcardSigner is set to true order can be signed by any account. In our case we need only our signature for the order to be successfully performed, so we set wildcardSigner to false. We want our order to be performed as soon as it can be, so we enable automated performance of the order by setting automatedPerform to true. Order will be automatically performed after all of the requirements of the order are fulfilled. If automatedPerform was set to false we would need to call performOrder(orderRef) function after the order creation. As payerId we set provider.accountId, so we will be paying for the execution of the order. To learn more about different scenarios check out the Additional scenarios section.

WARNING

If payer is not specified wildcardSigner field must be set to true and order's payer will be set automatically. If payer is specified it must be listed as order signer in signersIds array.

After our actions order is defined we can finally create it.

const actionsOrder = await client.createOrder(order, Priority.HIGH).then((data) => data.data);

WARNING

Make sure you have enough credits to perform this action.

Since actions order performance might take some time, we can check the order's status by requesting its data.

const status = await client.getOrder(actionsOrder.ref).then((data) => data.data.status);

If the status of the action order equals to 7, we know that our order was performed successfully and asset was issued. Now we can request our newly created asset.

const asset = await client.getLedgerAsset(ledger.ref, '100').then((data) => data.data);

TIP

You can also set up and receive webhooks. In this scenario you will receive webhooks when our order changes (updated or successful) or if it fails. You can learn more about webhooks in chapter Webhooks.

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