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Ethereum Beacon APIs

CI

Collection of RESTful APIs provided by Ethereum Beacon nodes

API browser: https://ethereum.github.io/beacon-APIs/

Outline

This document outlines an application programming interface (API) which is exposed by a beacon node implementation of the Ethereum consensus layer specifications.

The API is a REST interface, accessed via HTTP. The API should not, unless protected by additional security layers, be exposed to the public Internet as the API includes multiple endpoints which could open your node to denial-of-service (DoS) attacks through endpoints triggering heavy processing. Currently, the only supported return data type is JSON.

The beacon node (BN) maintains the state of the beacon chain by communicating with other beacon nodes in the Ethereum network. Conceptually, it does not maintain keypairs that participate with the beacon chain.

The validator client (VC) is a conceptually separate entity which utilizes private keys to perform validator related tasks, called "duties", on the beacon chain. These duties include the production of beacon blocks and signing of attestations.

The goal of this specification is to promote interoperability between various beacon node implementations.

Render

To render spec in browser you will need any http server to load index.html file in root of the repo.

Python
python -m http.server 8080

And api spec will render on http://localhost:8080.

NodeJs
npm install simplehttpserver -g

# OR

yarn global add simplehttpserver

simplehttpserver

And api spec will render on http://localhost:8000.

Usage

Local changes will be observable if "dev" is selected in the "Select a definition" drop-down in the web UI.

Users may need to tick the "Disable Cache" box in their browser's developer tools to see changes after modifying the source.

Contributing

Api spec is checked for lint errors before merge.

To run lint locally, install linter with

npm install -g @redocly/cli

# OR

yarn global add @redocly/cli

and run lint with

redocly lint beacon-node-oapi.yaml

Releasing

This repository supports both stable and pre-releases. The version of the next release has to be determined based on the changes in master branch since the last stable release. It is recommended to create a pre-release before releasing a new stable version.

Stable releases

Steps to create a new stable release:

  • Create and push a tag with the version of the release, e.g. v3.0.0
  • CD will create the github release, upload bundled spec files, and open a release PR
  • Review, approve and merge the release PR to master branch

Pre-releases

Steps to create a new pre-release:

  • Create and push a tag with the version of the release, e.g. v3.0.0-alpha.0
  • CD will create the github release and upload bundled spec files

Pre-releases will not be listed in index.html and are intended to allow early testing against the spec.