ln-service/test/chainrpc-integration/test_get_block_header.js

Interaction helper for your Lightning Network daemon

const {strictEqual} = require('node:assert').strict;
const test = require('node:test');

const {spawnLightningCluster} = require('ln-docker-daemons');

const {getBlockHeader} = require('./../../');
const {getHeight} = require('./../../');

const headerHexLength = 80 * 2;

// Get block header should return the block header
test(`Get block header`, async () => {
  const {nodes} = await spawnLightningCluster({});

  const [{chain, generate, kill, lnd}] = nodes;

  const blockchain = await getHeight({lnd});

  const hash = blockchain.current_block_hash;
  const height = blockchain.current_block_height;

  // Try getting a block header by the hash
  try {
    const {header} = await getBlockHeader({
      lnd,
      id: blockchain.current_block_hash,
    });

    strictEqual(header.length, headerHexLength, 'Got header');
  } catch (err) {
    const [code, message] = err;

    strictEqual(code, 501, 'Got expected code');
    strictEqual(message, 'GetBlockHeaderMethodNotSupported', 'Got error');

    await kill({});

    return;
  }

  // Try getting a block header by the height
  try {
    const {header} = await getBlockHeader({height, lnd});

    strictEqual(header.length, headerHexLength, 'Got header');
  } catch (err) {
    strictEqual(err, null, 'Expected no error');
  }

  // Try getting the chain tip block header
  try {
    const {header} = await getBlockHeader({lnd});

    strictEqual(header.length, headerHexLength, 'Got header');
  } catch (err) {
    strictEqual(err, null, 'Expected no error');
  }

  await kill({});

  return;
});