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Node News Thursday, March 29 Account, Bitcoin, Cache & more…

Node News TLDR / Table of Contents

  • Similarly, we have a function like the following: – – When we start creating accounts, they will start at one, leaving zero for the exchange or the web application, or whatever you want to call it.
  • To get a balance for any address we use or generate using the HD seed, we can use a public Bitcoin explorer: – – The above function will take an address and get the balance in decimal format as well as satoshis.
  • If we have X number of addresses for a given account, we can get the total balance using a function like this: – – In the above function we are making a request for each address and when theyve all completed, we can add the balances and return them.
  • The final utility related function, is something weve kind of already seen: – – The above function will get us all master keys, which will be useful for signing and checking value.
  • Okay, weve got account data and addresses in the database now.

Tags: account, Bitcoin, database, address, unspent transaction output

  • Just one route that points to a /products endpoint: – – // index.js – […] – – app.get(‘/products’, function(req, res){ – setTimeout(() = { – let db = new let sql = `SELECT * FROM products`; – – db.all(sql, [], (err, rows) = { – if (err) { – throw…
  • Import the module: – – // index.js – […] – – cache cache = require(‘memory-cache’); – – […] – Create and configure cache middleware : – – // index.js – – // configure cache middleware – let memCache = new cache.Cache(); – let cacheMiddleware = (duration) = { – return…
  • The index.js will look like this : – – // index.js – […] – – const flatCache = require(‘flat-cache’) – – […] – Then the new cache is loaded – – // index.js – […] – – // load new cache – let cache = // optionally, you can go…
  • If no directory was specified the module will determine where to save the cache-file – – – To use the flatCacheMiddleware , edit the application routes so : – – // index.js – […] – – // create app routes – – app.get(‘/products’, flatCacheMiddleware, function(req, res){ – […] – });…
  • When you have it installed, you then install the memcached node client by running : – – npm install –save memcached – Now that the client is installed, import the module in the index.js: – – // index.js – […] – – const Memcached = require(‘memcached’); – – […] -…

Tags: cache, response, different caching options, redis node client, node applications

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