@hivechain/dsteem

dsteem

Robust hive client library that runs in both node.js and the browser.

Needs test net urls, chain id

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note As of version 0.7.0 WebSocket support has been removed. The only transport provided now is HTTP(2). For most users the only change required is to swap wss:// to https:// in the address. If you run your own full node make sure to set the proper CORS headers if you plan to access it from a browser.

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Browser compatibility

Installation

Via npm

For node.js or the browser with browserify or webpack.

npm install dsteem

From cdn or self-hosted script

Grab dist/dsteem.js from a release and include in your html:

<script src="dsteem.js"></script>

Or from the unpkg cdn:

<script src="https://unpkg.com/dsteem@^0.8.0/dist/dsteem.js"></script>

Make sure to set the version you want when including from the cdn, you can also use dsteem@latest but that is not always desirable. See unpkg.com for more information.

Usage

In the browser

<script src="https://unpkg.com/dsteem@latest/dist/dsteem.js"></script>
<script>
  var client = new dsteem.Client("https://api.steemit.com");
  client.database
    .getDiscussions("trending", { tag: "writing", limit: 1 })
    .then(function(discussions) {
      document.body.innerHTML += "<h1>" + discussions[0].title + "</h1>";
      document.body.innerHTML += "<h2>by " + discussions[0].author + "</h2>";
      document.body.innerHTML +=
        '<pre style="white-space: pre-wrap">' + discussions[0].body + "</pre>";
    });
</script>

See the demo source for an example on how to setup a livereloading TypeScript pipeline with wintersmith and browserify.

In node.js

With TypeScript:

import { Client } from "dsteem";

const client = new Client("https://api.steemit.com");

for await (const block of client.blockchain.getBlocks()) {
  console.log(`New block, id: ${block.block_id}`);
}

With JavaScript:

var dsteem = require("dsteem");

var client = new dsteem.Client("https://api.steemit.com");
var key = dsteem.PrivateKey.fromLogin("username", "password", "posting");

client.broadcast
  .vote(
    {
      voter: "username",
      author: "almost-digital",
      permlink: "dsteem-is-the-best",
      weight: 10000
    },
    key
  )
  .then(
    function(result) {
      console.log("Included in block: " + result.block_num);
    },
    function(error) {
      console.error(error);
    }
  );

With ES2016 (node.js 7+):

const { Client } = require("dsteem");

const client = new Client("https://api.steemit.com");

async function main() {
  const props = await client.database.getChainProperties();
  console.log(`Maximum blocksize consensus: ${props.maximum_block_size} bytes`);
  client.disconnect();
}

main().catch(console.error);

With node.js streams:

var dsteem = require("dsteem");
var es = require("event-stream"); // npm install event-stream
var util = require("util");

var client = new dsteem.Client("https://api.steemit.com");

var stream = client.blockchain.getBlockStream();

stream
  .pipe(
    es.map(function(block, callback) {
      callback(null, util.inspect(block, { colors: true, depth: null }) + "\n");
    })
  )
  .pipe(process.stdout);

Bundling

The easiest way to bundle dsteem (with browserify, webpack etc.) is to just npm install dsteem and require('dsteem') which will give you well-tested (see browser compatibility matrix above) pre-bundled code guaranteed to JustWork™. However, that is not always desirable since it will not allow your bundler to de-duplicate any shared dependencies dsteem and your app might have.

To allow for deduplication you can require('dsteem/lib/index-browser'), or if you plan to provide your own polyfills: require('dsteem/lib/index'). See src/index-browser.ts for a list of polyfills expected.

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