haarts / blockchain_monitor

A library to monitor certain Bitcoin blockchain events with multiple redundancies

A high level blockchain monitoring library.

This library allows you to monitor blockchain events:

• new block
• new transaction for a particular address
• new confirmation for a particular transaction

It does so by using 4 different public API's:

• Blockbook (https://wiki.trezor.io/Blockbook)
• Blockcypher (https://www.blockcypher.com/dev/bitcoin/#introduction)
• Blockchain.info (https://www.blockchain.com/api)
• Blockchair (https://blockchair.com/api)

It uses 4 different API's for redundancy reasons. All events are normalized and de-duplicated.

Please note that this library does not contain any querying capabilities. Use the individual clients for that instead.

Usage

A simple usage example:

import 'package:blockchain_monitor/blockchain_monitor.dart';

main() async {
  var monitor = new Monitor();
  Stream<Transaction> txs = monitor.address('some Bitcoin address');
  await for (tx in txs) {
    print(tx);
  }
  
  Stream<int> confirmations = monitor.confirmations('some tx hash');
  await for (confirmation in confirmations) {
    print(confirmation);
  }
  
  Stream<Block> blocks = monitor.blocks();
  await for (block in blocks) {
    print(block);
  }
}

Features and bugs

Please file feature requests and bugs at the issue tracker.