Fallback Provider

Usage

Create a config file for the backends to be used. Example -
```
providers:
  - url: 'https://mainnet.infura**'
    config: 
      priority: 2
      stallTimeout: 200
      weight: 2
  - url: 'infura.io/zzz'
    config:
      priority: 1
      stallTimeout: 100
      weight: 1
```
Priority: The priority used for the provider. Higher priorities are favoured over lower priorities. If multiple providers share the same priority, they are chosen at random.

stallTimeout: The timeout (in ms) after which another Provider will be attempted. This does not affect the current Provider; if it returns a result it is counted as part of the quorum.Lower values will result in more network traffic, but may reduce the response time of requests.

weight: The weight a response from this provider provides. This can be used if a given Provider is more trusted, for example.
Add the package to the project
npm i fallback-provider
OR
yarn add fallback-provider

Import the provider as usual, i.e

const {FallbackProvider} = require('fallback-provider')
const provider = new FallbackProvider(<pathToConfig>)