Keplr signing ADR36

This repo will be used to facilitate a Discord bot but can be helpful for anyone wanting to use the Keplr wallet to sign arbitrary messages and verify the signed document and public key.

There is a standard called ADR36 for signed typed messages, and we'll get as close as we can to using this standard, except when the Keplr wallet limitation exist.

Using this repo

There is a server (ExpressJS) and a React frontend that communicate. This document is for the frontend.

Good idea to have NodeJS version >= v14.17.0

Let's also get yarn with:

npm i -g yarn

First we install with:

yarn

npm run start

This will give you instructions in your Terminal or Command Prompt app.

What's happening

We are using the Keplr to sign a message using the private key stored in the wallet. This message will then be passed to the backend where it can be verified, and the backend can interact with a database / server / whatever and process as it pleases.

Local development

If you're running a local server, you can specify a custom Starry backend with:

env REACT_APP_STARRY_BACKEND=http://localhost:8080 npm run start

Helpful resources

• Keplr development
• Ethereum concepts about signed typed message from the "Sign-in with Ethereum" initiative.
• A draft implementation from Simon Warta that may be helpful
• A test in CosmJS that elucidates signing and verifying using Amino