We believe that the DApps ecosystem will benefit from a common core API that each parachain can integrate (and extend) to index and expose their chain data for future consumer facing applications (e.g. a wallet, explorer, or other dApp). 

There will be 3 individually proposed milestones delivering open source projects, packages, and associated learning material to help decentralised app developers start building applications on Polkadot/Kusama

**Who**

This is a joint proposal between two parties - SubQuery/OnFinality and Fearless Wallet/SORAMITSU

**What**
1. Create an Open-Source SubQuery Project for Common Data
2. Document and Publish Learning Material and Tutorials

**Outcomes**
1. Improve the Interoperability of DApps and Parachains
2. Attract and Support More Developers in Kusama

### Milestone 1

**This proposal is for the 1st milestone only.**

Design and publish the proposed common GraphQL API definition for Kusama that the remainder of this proposal will deliver. This will be published using a GitHub repository and a GraphQL documentation tool (like Graphdoc). 

We will then reach out to the community for consultation and ideas around how we can improve this API (and the models within it) for more general use across different types of dApps.

[Please read full proposal here](https://docs.google.com/document/d/13L8HBwB6VB-n2g274FFFJKORYPJsq744C6H8iEDQ0-0/edit?usp=sharing)

 Approve a proposal. At a later time, the proposal will be allocated to the beneficiary
 and the original deposit will be returned.

 May only be called from `T::ApproveOrigin`.

 # <weight>
 - Complexity: O(1).
 - DbReads: `Proposals`, `Approvals`
 - DbWrite: `Approvals`
 # </weight>

- They want to create a common core API for DApps on Polkadot/Kusama.
- Two parties are working together on this proposal.
- They will create an open-source project and provide learning material for developers.
- The goal is to improve the interoperability of DApps and attract more developers to Kusama.
- This proposal is for the first milestone, which involves designing and publishing the API definition.

#319 Open-Source DApp API - Milestone 1