Create and Implement the printChainInfo Function

Next, we’ll create an async function named printChainInfo, which will fetch and display important chain information like the chain’s name and its latest finalized block.

Here’s what we’ll do:

1. Create the function: Define an async function named printChainInfo that accepts a client parameter of type PolkadotClient.
2. Fetch the chain specifications: Inside the function, use the client.getChainSpecData() method to retrieve the chain’s specification. Don’t forget to await the result and store it in a constant named chainSpec. IMPORTANT NOTE: This method is used in this tutorial, but it should not be used in production apps.
3. Fetch the latest finalized block: Next, call the client.getFinalizedBlock() method to get the most recently finalized block. Again, await the result and store it in a constant called finalizedBlock.
4. Print the data: Finally, log the chain’s name (chainSpec.name) and the finalized block number (finalizedBlock.number) in a user-friendly message.

In the next steps, we’ll dive deeper into how to call this function and work with the fetched data. Let’s keep moving!