HIVE nodes checker

Regularly checks availability and performance of HIVE blockchain RPC nodes asynchronously, stores the result in an in-memory array, and sends the result through a subscription (RxJS).

Getting Started

Installation

Using npm:

$  npm install @mintrawa/hive-nodes-checker --save

Using browser:

<script type="module" src="./dist/hive-nodes-checker.min.js"></script>

From the source:

clone the repository

$  git clone https://github.com/Mintrawa/hive-nodes-checker.git

Build for NodeJS/Angular... in "./lib" directory

$  npm run build

Build for browser (minified) in "./dist" directory

$  npm run build-browser

Initialisation

Initialise the HIVE nodes checker with params

/** Init the checker */
const nodesChecker = new HiveNodesChecker(["url"])

Params

• url: array of node url to check
• options (optional):
  • full (boolean): if false perform only a get_config with response time (default: false)
  • interval (seconds): delay in seconds between each execution (default: 900 seconds)
  • timeout (seconds): timeout in seconds for node request (default: 3 seconds)
  • reset (number): number max of test before resetting the counters (default: no reset)

Functions

start()

Start the checking process

/** Start the checker */
nodesChecker.start()

restart()

restart the checking process with the same params

/** Restart the checker */
nodesChecker.restart()

stop()

stop the checking process

/** Stop the checker */
nodesChecker.stop()

Message subscription

message.subscribe()

It use RxJS to send the result of a check

/** Subscribe results */
nodesChecker.message.subscribe({
  next: async m => {
    ...
  },
  error: error => {
    ...
  }
})

message.unsubscribe()

Unsubscribe manually from the Observable

/** Unsubscribe results */
nodesChecker.message.unsubscribe()
})

Example usage

Performing a full checking:

import { HiveNodesChecker } from '@mintrawa/hive-nodes-checker'

/** HIVE nodes url to check */
const nodes = [
  "https://api.hive.blog",
  "https://api.openhive.network",
  "https://api.deathwing.me",
  "https://rpc.ausbit.dev",
  "https://rpc.ecency.com",
  "https://hive-api.arcange.eu",
]

/** Options */
const options = {
  full: true,
  interval: 600, // 10 minutes
  reset: 144 // every 144 tests => 24 hours x 6 (10 minutes = 6 test per hours)
}
/** Init the checker */
const nodesChecker = new HiveNodesChecker(nodes, options)
/** Start the checker */
nodesChecker.start()
/** Subscribe results */
nodesChecker.message.subscribe({
  next: async m => {
    console.log('=====> NEW MESSAGE', m)
    console.log()
  },
  error: error => {
    console.log('=====> ERROR MESSAGE')
    console.log(error)
    console.log()

    /** Restart the checker */
    nodesChecker.restart()
  }
})  

Light checking

In this case, only a call to the rpc method condenser_api.get_config is made.

Result

[{
  "url":            string
  "nb_ok":          number
  "nb_error":       number
  "nb_degraded":    number
  "error"?:         string
  "last_check":     number
  "status":         "unkown"|"online"|"degraded"|"error"
  "duration"?:      number
  "average_time"?:  number
  "version"?:       string
  "deactivated"?:   boolean

  "test_result":    []
}]

Exemple of result for a light checking

[
  {
    "url": "https://api.hive.blog",
    "nb_ok": 1,
    "nb_error": 0,
    "nb_degraded": 0,
    "last_check": 1641001821365,
    "status": "online",
    "test_result": [],
    "version": "1.25.0",
    "duration": 1558
  },
  ...
]

Full checking

In this case the methods below are checked:

• condenser_api.get_config

• condenser_api.get_accounts

• condenser_api.get_account_history

• condenser_api.get_accounts_reputations

• condenser_api.get_block

• condenser_api.get_blog_entries

• condenser_api.get_content

• condenser_api.get_dynamic_global_properties

• condenser_api.get_discussions_by_blog

• bridge.get_post

• bridge.get_account_posts

Result

[{
  "url":            string
  "nb_ok":          number
  "nb_error":       number
  "nb_degraded":    number
  "error"?:         string
  "last_check":     number
  "status":         "unkown"|"online"|"degraded"|"error"
  "duration"?:      number
  "average_time"?:  number
  "version"?:       string
  "deactivated"?:   boolean

  "test_result":   [{
    "name":        string
    "description": string
    "method":      string
    "success":     boolean
    "duration":    number
    "error"?:      string
    "last_check":  number
  }]
}]

Exemple of result for a full checking

[
  {
    "url": "https://api.hive.blog",
    "nb_ok": 1,
    "nb_error": 0,
    "last_check": 1641002823566,
    "status": "online",
    "test_result": [
      {
        "name": "Get Account",
        "description": "Retrieve an account details",
        "method": "condenser_api.get_accounts",
        "success": true,
        "duration": 1166,
        "last_check": 1641002823566
      },
      ...
    ],
    "version": "1.25.0",
    "duration": 1273,
    "average_time": 1748
  },
  ...
]

Contributing

Pull requests for new features, bug fixes, and suggestions are welcome!

License

Copyright (C) 2021 @mintrawa (https://hive.blog/@mintrawa)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.