// load this library
const BlockIo = require('block_io');

// instantiate a client
const block_io = new BlockIo('API_KEY');

async function example() {
  try {
    // print the account balance
    let balance = await block_io.get_balance();
    console.log(JSON.stringify(balance,null,2));

    // print first page of unarchived addresses on this account
    let addresses = await block_io.get_my_addresses();
    console.log(JSON.stringify(addresses,null,2));

    // withdrawal:
    //   prepare_transaction ->
    //   summarize_prepared_transaction ->
    //   create_and_sign_transaction ->
    //   submit_transaction
    let prepared_transaction = await block_io.prepare_transaction({
      from_labels: 'label1,label2',
      to_label: 'label3',
      amount: '50.0'
    });

    // inspect the prepared data for yourself. here's a
    // summary of the transaction you will create and sign
    let summarized_transaction = await block_io.summarize_prepared_transaction({data: prepared_transaction});
    console.log(JSON.stringify(summarized_transaction,null,2));
    
    // create and sign this transaction:
    // we specify the PIN here to decrypt
    // the private key to sign the transaction
    let signed_transaction = await block_io.create_and_sign_transaction({data: prepared_transaction, pin: 'SECRET_PIN'});

    // inspect the signed transaction yourself
    // once satisfied, submit it to Block.io
    let result = await block_io.submit_transaction({transaction_data: signed_transaction});
    console.log(JSON.stringify(result,null,2)); // contains the transaction ID of the final transaction
    
  } catch (error) {
    console.log("Error:", error.message);
  }
}

example();

block_io.get_balance()
        .then(data => console.log(JSON.stringify(data,null,2)))
        .catch(error => console.log("Error:", error.message));

block_io.get_balance((error, data) => {
  if (error) return console.log("Error:", error.message);
  console.log(JSON.stringify(data,null,2));
});

const config = {
  api_key: "YOUR_API_KEY",
  version: 2,              // REST API version to use. Default: 2
  options: {
    allowNoPin: false,     // Allow ommission of PIN for withdrawal.
                           // This may be useful when interfacing with
                           // hardware wallets and HSMs. Default: false.

    lowR: true,            // Sign with a low R value to save a byte and
                           // make signature size more predictable, at the
                           // cost of more CPU time needed to sign transactions.
                           // Default: true

  }
}

const block_io = new BlockIo(config);