Lesson 4 - Register and Mint

In this lesson, we will walk you through the process of minting an asset using the FT4 token standard.

We will use the register_and_mint_asset operation defined in the asset_management/rell/src/main.rell file to create a new asset and mint it to an account.

To call an operation, you will need an FT4 session. You can get the current session using the useFtSession hook from the @chromia/react package.

asset_management/src/hooks/token-hooks.ts

import { useFtSession } from "@chromia/react";
import { publicClientConfig as clientConfig } from "@/utils/generate-client-config";

interface MintTokenParams {
  ticker: string;
  name: string;
  amount: number;
}

function useMintToken() {
  const { data: ftAccounts } = useFtAccounts({ clientConfig });
  const { data: session } = useFtSession(
    ftAccounts?.length ? { clientConfig, account: ftAccounts[0] } : null,
  );

  const registerAsset = useCallback(
    async (token: MintTokenParams) => {
      if (!session) return;

      try {
        await session
          .transactionBuilder()
          .add(
            op(
              "register_and_mint_asset",
              token.name,
              token.ticker,
              8,
              BigInt(token.amount),
              "https://cdn-icons-png.flaticon.com/512/4863/4863873.png",
            ),
          )
          .buildAndSend();

        onSuccess?.(token);
      } catch (error) {
        console.error(error);

        onError?.(token);
      }
    },
    [session],
  );

  return mintToken;
}

In the code snippet above, we have created a custom hook called useMintToken that uses the useFtSession hook to get the current session.

The useMintToken hook takes a MintTokenParams object as an argument, which contains the following properties:

• ticker: The ticker symbol of the asset.
• name: The name of the asset.
• amount: The amount of the asset to mint.

Transactions can be built using the transactionBuilder method of the session object. We add the register_and_mint_asset operation to the transaction using the add method.

Calling the buildAndSend method will initiate a signature request for the transaction by using the configured keystore.