node-bitcoinfees-21co

bitcoinfees from 21.co

API Document

• https://bitcoinfees.21.co/api

limit

Current API Rate Limit: 5000 requests per hour.

• 5000 req/hour
• 83.3 req/min
• 1.3 req/sec

install

npm i bitcoinfees-21co

Usage

recommended

var bitcoinfees = require('bitcoinfees-21co');
bitcoinfees.FeesApi.recommended().then(function(res){
    console.log(res)
})

{ "fastestFee": 40, "halfHourFee": 20, "hourFee": 10 }

list

var bitcoinfees = require('bitcoinfees-21co');
bitcoinfees.FeesApi.list().then(console.log)

{ "fees": [ 
  {"minFee":0,"maxFee":0,"dayCount":545,"memCount":87,
  "minDelay":4,"maxDelay":32,"minMinutes":20,"maxMinutes":420},
...
 ] }

HTTP Error Handling

simple error control

bitcoinfees.FeesApi.recommended().catch(function(e){
    console.log(e.message)
})

technical error control

var errors = require('bitcoinfees-21co/errors')
bitcoinfees.FeesApi.recommended()
    .catch(errors.StatusCodeError, function (reason) {
        // HTTP STATUS ERROR(404 or 500, 502, etc...)
        console.log("HTTP StatusCodeError " + reason.statusCode, "HTTP", reason.statusCode)
    })
    .catch(errors.RequestError, function (reason) {
        // REQUEST ERROR(SYSTEMCALL, TIMEOUT)
        console.log(reason.message, "SYSCALL", reason.error.code)
    })
    .catch(function(e){
        // OTHER ERROR
        console.log(e.message)
    })

VALUE Error Handling

var bitcoinfees = require('bitcoinfees-21co');
var assert = require('assert');
var clamp = function(value, min, max){
    return Math.min(Math.max(min, value), max)
}
bitcoinfees.FeesApi.recommended().then(function(res){
    assert(res.hourFee > 0);
    return clamp(res.hourFee, 20, 200) // The API obstacle leads to loss
})

memo

It is better to store it in the database when using it on the server