Index non-Substrate chain data

[dzhelezov]

Index on-chain data of a non-Substrate chain

Prize Bounty

Bounties Totalling $7000 in USDC depending on the quality of the submission, splitted between the winning ($6000) and the runner-up ($1000) submission.

Challenge Description

At the moment Subsquid supports data indexing only for chains built with the Substrate framework. The indexed data is exposed via a GraphQL endpoint supporting batching and filtering. For example, it is possible to batch all on-chain events from block 10000000 to 11000000 with the name balances.Transfer
For example, using the Kusama Indexer endpoint one can retrieve such events with the following query

query MyEvents {
  substrate_event(where: {name: {_eq: "balances.Transfer"}, blockNumber: {_gt: 10000000, _lt: 11000000}}) {
    data
    blockNumber
    blockTimestamp
    blockHash
  }
}

You can play around further by adding extra fields and filtering using the explorer pane of the console above.

This bounty aims to build a similar GraphQL endpoint for any non-Substrate-based chains (e.g. Algorand, Terra, Avalanche, Solana, whatever you like the beast). The submission should expose on-chain data via GraphQL API, supporting the following features:

• get block data
• get tx data within a given block range, satisfying filtering parameters
• get event data within a given block range, satisfying filtering parameters
• it should be possible to fetch multiple txs or events in a single query
• support filtering by the most relevant attributes

Not all the features from the list above have to be supported for a submission to be considered for acceptance, but the more the better.

Submission Requirements

A Submission should be a fully runnable indexer with a GraphQL API together with documentation and sample queries.

Judging Criteria

• A readme and Github repo link and a video tutorial must be submitted.
• Is it possible to reliably batch events/transactions satisfying filtering conditions similar to the existing Subsquid Indexers like Kusama

Winner Announcement Date

A winner will be announced shortly after the hackathon is complete. The winner gets 6000 USDC and the runner-up submission is awarded 1000 USDC.

Resources

• Subsquid docs
• Kusama Indexer
• A repo with indexer setups for different Substrate chains
• Subsquid (Hydra) indexer lib code
• Subsquid (Hydra) indexer gateway lib code. It is powered by Hasura

Where to get help

• Subsquid Tg chat: https://t.me/subsquid
• Subquid Discord: https://discord.com/invite/5cQBWHWJvW
• HydraDevs Tg chat: https://t.me/HydraDevs

[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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This issue now has a funding of 7000.0 USDC (7000.0 USD @ $1.0/USDC) attached to it.

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work has been started.

These users each claimed they can complete the work by 2 weeks, 3 days from now. Please review their action plans below:

1) cryptofervid has started work.

Analysing the requirements and going through the documentation. Project details to be updated soon.

Learn more on the Gitcoin Issue Details page.