1.0.0 • Published 7 years ago
mycrypto-eth-exists v1.0.0
eth-exists
A library that helps check for available nodes / providers. Useful for when you want to check a list of providers and see which ones are online.
Usage
import { exists } from 'mycrypto-eth-exists';
// a provider to see if they're online or not by sending a
// getNetVersion JSON-RPC request to them and checking for a response
const httpProviderToCheck: IHttpConfig = {
type: 'http',
addr: 'http://localhost',
port: 8545,
timeout: 5000,
};
// a provider to see if they're online or not by
// attempting to open a ws connection to that address
const wsProviderToCheck: IWSConfig = {
type: 'ws',
addr: 'ws://localhost',
port: 8546,
timeout: 5000,
};
// array of providers to check
const providersToCheck = [httpProviderToCheck, wsProviderToCheck];
// whether to include the default provider checks
const includeDefaults = false;
async function example() {
// results will contain an array of providers with the same data as the initially declared
// objects above, except they will now have a success parameter included to see if
// they were succesfully connected to or not
// and an error parameter of the error if it failed to connect
const results = await exists(providersToCheck, includeDefaults);
}
Provider Check Defaults
const DEFAULT_WS: IWSConfig = {
type: 'ws',
addr: 'ws://localhost',
port: 8546,
timeout: 5000,
};
const DEFAULT_HTTP: IHttpConfig = {
type: 'http',
addr: 'http://localhost',
port: 8545,
timeout: 5000,
};
1.0.0
7 years ago