SSV Subgraph
The Graph is a decentralized indexing protocol for the Ethereum (and other EVM-compatible) blockchains. It allows to process data produced by smart contracts and apply logic to it, making it easier and faster to query.
The Graph can be used for querying data related to the SSV protocol and develop applications on top of it.
New to GraphQL?
Before diving into subgraph queries, get familiar with GraphQL basics: Learn GraphQL
A Subgraph that implements the necessary logic to index all the events emitted by the SSV smart contract has been developed, and the code is open source, you can find it here.
Examples
A series of examples of the most useful queries and the data accessible via the Subgraph is available at the Subgraph Examples subpage.
Querying SSV Protocol smart contract data
Currently, there are two official Subgraphs deployed, one for Ethereum Mainnet and one for the Hoodi Testnet
There are a few ways to access SSV smart contract data through The Graph.
Subgraph Playground user interface
First of all, you can access the Subgraph page on the Graph Explorer, and use it to experiment and prototype queries using the provided Playground.
It's possible to access the underlying GraphQL schema, by clicking the folder icon on the right of the playground. This is self-documenting, similarly (and more) to Swagger for a RESTful API, but it's also more powerful, since it will allow you to build queries through simple point-and-click interactions.
Once you are satisfied with the query you built, click on the Play button in the center to launch it and obtain the result.
Further documentation about the schema can be accessed by clicking on the book icon on the right of the Playground window.
Query API
The screenshot below shows the lower section of the Query page.
It provides instructions on how to query this subgraph programmatically, using the public endpoint and an API-key. You can generate your own API key by visiting the Subgraph Studio page, and selecting API Keys at the top. The free plan allows 100 thousand queries per month, which should be plenty for your development needs.
Delving deeper into programmatically querying the endpoint: in order do this, you would need to know exactly the query you want to perform, and then perform a POST request to the provided endpoint, adding the API key as a header to the request.