just another programmer blog
Automatic deployment is an essential part of continuous integration (CI). But sometimes full-fledged CI tools/services — like Jenkins, Gitlab-CI, or Travis-CI — are overkill for simple or personal projects. That’s where deployment automation tools like ShipIt shines. ShipIt is not the only automation tool. There are Capistrano (Ruby), Envoy (PHP), Fabric (Python), and, Gradle +… Read More
While running your own Ethereum node with geth by using web3js from node.js (backend) app is a common solution, connecting to a public Ethereum node such as infura.io and using [truffle-contract](https://github.com/trufflesuite/truffle-contract] gives some benefits: No need to maintain your own Ethereum node (syncing a full node requires huge storage space! (around 40 GB for Ropsten))… Read More
BlockCypher provides convenient REST APIs to send cryptocurrency like Bitcoin easily. Here are two APIs that we can use to send Bitcoin from one address to another: 1. Build transaction skeleton https://api.blockcypher.com/v1/btc/test3/txs/new 2. Push signed transaction https://api.blockcypher.com/v1/btc/test3/txs/send Here are the step by steps of using those APIs in JavaScript (Node.js) in testnet3 Bitcoin network. First,… Read More
In certain cases, it’s convenience to have automatic creation & modification timestamp where system automatically records when and who create/update a record. So far, I find that the most efficient way to do this in Loopback is by utilizing hook feature. Based on the docs, there are 3 types of hooks provided by loopback based… Read More
