Skip to content

gpsanant/go-eth2-client

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

go-eth2-client

Tag License GoDoc Lint Go Report Card

Go library providing an abstraction to multiple Ethereum 2 beacon nodes. Its external API follows the official Ethereum beacon APIs specification.

This library is under development; expect APIs and data structures to change until it reaches version 1.0. In addition, clients' implementations of both their own and the standard API are themselves under development so implementation of the the full API can be incomplete.

Table of Contents

Install

go-eth2-client is a standard Go module which can be installed with:

go get github.com/attestantio/go-eth2-client

Support

go-eth2-client supports beacon nodes that comply with the standard beacon node API. To date it has been tested against the following beacon nodes:

Usage

Please read the Go documentation for this library for interface information.

Example

Below is a complete annotated example to access a beacon node.

package main

import (
    "context"
    "fmt"
    
    eth2client "github.com/attestantio/go-eth2-client"
    "github.com/attestantio/go-eth2-client/http"
    "github.com/rs/zerolog"
)

func main() {
    // Provide a cancellable context to the creation function.
    ctx, cancel := context.WithCancel(context.Background())
    client, err := http.New(ctx,
        // WithAddress supplies the address of the beacon node, as a URL.
        http.WithAddress("http://localhost:5052/"),
        // LogLevel supplies the level of logging to carry out.
        http.WithLogLevel(zerolog.WarnLevel),
    )
    if err != nil {
        panic(err)
    }
    
    fmt.Printf("Connected to %s\n", client.Name())
    
    // Client functions have their own interfaces.  Not all functions are
    // supported by all clients, so checks should be made for each function when
    // casting the service to the relevant interface.
    if provider, isProvider := client.(eth2client.GenesisProvider); isProvider {
        genesis, err := provider.Genesis(ctx)
        if err != nil {
            panic(err)
        }
        fmt.Printf("Genesis time is %v\n", genesis.GenesisTime)
    }

    // You can also access the struct directly if required.
    httpClient := client.(*http.Service)
    genesis, err := httpClient.Genesis(ctx)
    if err != nil {
        panic(err)
    }
    fmt.Printf("Genesis validators root is %#x\n", genesis.GenesisValidatorsRoot)

    // Cancelling the context passed to New() frees up resources held by the
    // client, closes connections, clears handlers, etc.
    cancel()
}

Maintainers

Jim McDonald: @mcdee.

Contribute

Contributions welcome. Please check out the issues.

License

Apache-2.0 © 2020, 2021 Attestant Limited

About

No description, website, or topics provided.

Resources

License

Stars

Watchers

Forks

Packages

No packages published

Languages

  • Go 100.0%