Almost every Substrate project has a need to process and query data. SubQuery is a open-source tool to provide a complete solution to this problem and will become core infrastructure for the Polkadot ecosystem. We expect it to solve how to Extract, Transform, Persist, and Query data intially, and then how to Connect and Present data in the future.
SubQuery is NOT an ETL tool, the persisted data is minimized and shaped from the perspective of how it will be used.
SubQuery aims to support all Substrate-compatible networks.
npm i -g @subql/cli @subql/node @subql/query- use
@subql/clitool we provide to create a SubQuery project
- it is written in typescript
- user needs to config the project, define a schema and implement mapping functions
- use
@subql/clito generate types from the given schema - use
@subql/clito compile and pack the SubQuery project
Prerequisites
- A Postgres database
- Non-archive full node. If storage query is used, then an archive node is required to extract chain data. OnFinality provides an archive node with a generous free tier that should be more than able to cover most cases.
- A moderately powerful computer to run an indexer in the background
Then start our
@subql/nodewith the path of local SubQuery project as arguments,@subql/nodewill handle the rest.
Check our query component @subql/query
For more documentation, visit doc.subquery.network
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