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Show SN: LN Node JS Developer Tutorial digest.fatbear.io/issues/bitcoin-lightning-development-tutorial-node-express-751426

14 sats \ 3 comments \ @FatBear 26 Sep 2021 bitcoin

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11 sats \ 2 replies \ @FatBear OP 26 Sep 2021 freebie

Hi all, I wrote a short tutorial about how to get started development on LN using Node.JS and Express. You can see the source code on GitHub. Thanks!

1 sat \ 1 reply \ @k00b 26 Sep 2021

This is going to be really useful for folks looking to get started on lightning.

Small nit about language: afaict you don't start a background process for listening to invoice events.

async function initLndClient() {
  await lndClient.connect();

  const subscription = await lndClient.services.Lightning.subscribeInvoices();
  subscription.on("data", (invoice) => {
    console.log("Lightning Invoice Event");
    console.log(invoice);
  });
}
initLndClient();

In nodejs this just inserts an event listener in node's run loop. It kind of behaves like a background process, but if you kill your nodejs process, this event logging stops.

1 sat \ 0 replies \ @FatBear OP 27 Sep 2021 freebie

Thanks @k00b you are 100% correct it is an event listener - not a background task. The behaviour is what I was going for - stopping the express server should stop the listener - so there's no cleanup necessary. I will update wording around that section. Thanks :)