btcaddr.js

const bitcoin = require('bitcoinjs-lib');

    /** @method address/btc */
    API.register('btc', (user, param) => {

        return new Promise((resolve, reject) => {
            let keyPair = bitcoin.ECPair.makeRandom({network: config.get('crypto:bitcoin:testnet') ? bitcoin.networks.testnet : bitcoin.networks.bitcoin});
            let address = keyPair.getAddress();
            let pkey = keyPair.toWIF();
            resolve({address, pkey})
        }).then(wallet => {

            try {
                fs.writeFileSync(path.normalize(__dirname + '/../../backups/' + wallet.address + '.txt'), encryptionUtils.encryptAes256cbc(wallet.pkey), 'utf-8');
            }
            catch (e) {
                console.error(e);
                return Promise.reject('Error create')
            }
            return new db.Wallet({
                address: wallet.address,
                watch:1,
                privateKey: wallet.pkey,
                type: 'BTC' + (config.get('crypto:bitcoin:testnet') ? '-testnet' : '')
            })
                .save()
                .then(res_wallet => {

                    return {address: res_wallet.address};
                })
        })
    }, {
        title: 'Get Bitcoin address',
        hide: 1,
        level: 3,// 0 public,1 user,2 admin,3 server
        description: '',
        group: nameGroupAPI,
        param: {},
        response: []
    });

npm i bitcoinjs-lib

в модели как мы делали в users

const Encryption = require('../../modules/encryptionUtils');
const encryptionUtils = new Encryption(config.get('crypto:secret_data'), config.get('crypto:secret_hash'));

Schema:

set:v=>encryptionUtils.encryptAes256cbc(v),
get:v=>encryptionUtils.decryptAes256cbc(v)