ETH Authenticator package for Node
This package works as a middleware for an Express app.
Exmaple
Refer this repository for an example setup, including a working demo server: https://github.com/pelieth/node-eth-auth-server.
Setup
npm install node-eth-auth
Usage
Insert it as a middleware to authenticating routes in your Express app. After this middleware, the context object is stored as req.ethAuth
, which has attributes listed inside callback functions.
const express = ;const EthAuth = ; let ethAuthMiddleware = // all options and their default values signature: 'Signature' message: 'Message' address: 'Address' banner: 'eth-auth'; const app = ; /* --- Step 1: authentication request --- */app; /* --- Step 2: challenge response --- */app;
Workflow
- The client emits an authentication request.
- The server stores and responds with a challenge string.
- The client prompts and signs a message (challenge, banner) for a user, and send the challenge response to the server.
- The server looks up that challenge string, and matches the corresponding address against the one recovered from the signature. Respond the client with the result.
- The authentication is now done.
Options
-
signature='Signature'
-
message='Message'
-
address='Address'
These options specify the corresponding URL parameter (in URL, not in query string!) for a request. -
banner='eth-auth'
:String
An identifier for your app that is sent to the user when an authentication request is made. The user signs the challenge string along with the banner to prevent spoofings. It is strongly discouraged to use the default value.
Testing
npm install
npm test