A way to search for monero transactions with particular inputs in ring groups

monero-search.js

const monerojs = require('monero-javascript');
const cliProgress = require('cli-progress');

async function scanForInputs() {

  // parameters
  const rpc = await monerojs.connectToDaemonRpc('http://localhost:18081');

  const min_height = 2853173;

  // get indices using node command line interface:
  // const monerojs = require('monero-javascript');
  // const rpc = await monerojs.connectToDaemonRpc('http://localhost:18081');
  // tx = await rpc.getTx('TX hash here')
  // tx.getOutputs()[0].getIndex()

  // put the indices here:
  const ring_member_indices = [ 70900000, 70911111 ]

  // go!

  let height = await rpc.getHeight();

  const bar = new cliProgress.SingleBar({}, cliProgress.Presets.shades_classic);
  bar.start(height-min_height, 0);

  for (block_i=min_height; block_i <= height; block_i++) {
    const block = await rpc.getBlockByHeight(block_i)
      for (const tx_hash of block.getTxHashes()) {
        rpc.getTx(tx_hash).then( (tx) => {
        for (const input of tx.getInputs()) {
          let absIndex = 0
          for (const relIndex of input.getRingOutputIndices()) {
            absIndex = absIndex + relIndex
            for (const ringMemberIndex of ring_member_indices) {
              if (absIndex === ringMemberIndex) {
                console.log('')
                console.log(`Transaction ${tx_hash} contains ring member ${ringMemberIndex}`);
                console.log('')
              }
            }
          }
        }
      })
      }
    bar.update(block_i-min_height)
  }
  bar.stop()
}

scanForInputs();