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** Add repository and install bitcoind ** 

sudo apt-get install build-essential
sudo apt-get install libtool autotools-dev autoconf
sudo apt-get install libssl-dev
sudo apt-get install libboost-all-dev
sudo add-apt-repository ppa:luke-jr/bitcoincore
sudo apt-get update
sudo apt-get install bitcoind
mkdir ~/.bitcoin/ && cd ~/.bitcoin/

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{
    test_name: string,
    test_description: string,
    test_video: string, //url
    test_questions: [
        {
            question_id: integer, 
            question_text: string, 
            question_options: [
                {

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import _ from 'lodash';

const getInvoiceAmount = (invoice) => {
    const cleanInvoice = invoice.toLowerCase();

    let removedNetwork;
    if (_.startsWith(cleanInvoice, 'lnbc')) {
        removedNetwork = cleanInvoice.replace('lnbc', '');
    } else if (_.startsWith(cleanInvoice, 'lntb')) {
        removedNetwork = cleanInvoice.replace('lntb', '');