w3f-grants-archive/polkadot-cosmos-docs

Cosmos SDK Parachain development kit

This repository contains documentation for the project. The project is being developed, some parts of the documentation may be out-of-date.

Project Overview

Polkadot and Cosmos are two projects with a similar aim: integrate independent blockchain technologies in a single infrastructure supporting communication between them.

Our project’s core idea is to combine Polkadot shared security with the flexibility of Cosmos SDK to allow developers to create parachains based on Cosmos SDK. We are building functionality that allows anyone who has built a chain with the Cosmos SDK to turn that chain into a full Polkadot parachain; so any sovereign chain created with the Cosmos SDK could be connected with Polkadot and not be responsible for its own security.

Current stage

By this moment, we have implemented a basic integration between Substrate and Cosmos SDK that allows transaction and block producing and validation. Tendermint consensus and network layers used in Cosmos have been replaced with Substrate-based “sub-node". We have implemented a new Substrate pallet that acts like Tendermint. Changes in Cosmos SDK were minimized to allow Cosmos developers to change the consensus and network layers of their applications as easily as possible. To run Cosmos SDK with the Substrate a user need only enable a few flags during the node start (disable Tendermint consensus and enable grpc).

A more detailed description of the finished steps and future plans can be found in the roadmap.

The details of solution architecture are described here.

Links

• User guide
• Polkadot
• Cosmos