> For the complete documentation index, see [llms.txt](https://docs.sat20.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sat20.org/english/run-the-network-nodes-and-infrastructure/indexer.md).

# L1 / L2 Indexer

Indexers are SatoshiNet's asset fact layer. L1 Indexer handles Bitcoin mainnet multi-protocol asset facts. L2 Indexer handles SatoshiNet transactions, UTXOs, channels, contracts, and cross-layer states.

## Operating Value

1. Provide asset queries for wallets and exchanges.
2. Provide visualized data for explorers.
3. Provide cross-layer evidence for STP and Agents.
4. Provide state queries for DEX, DAO, and contract applications.
5. Reduce single-point dependency through multi-party operation.

## To Be Completed

1. L1 Indexer deployment requirements.
2. L2 Indexer deployment requirements.
3. Data backup and reorg handling.
4. API stability and error codes.
5. Cross-verification across multiple indexers.

**Page Status: Planning**