> 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/start-here-choose-your-path/wallet-exchange.md).

# I Am a Wallet or Exchange

Wallets and exchanges are important entry points for SatoshiNet. Users ultimately need to identify assets, deposit, withdraw, move cross-layer, trade, and verify safety through wallets and exchanges.

## What You Need to Integrate

| Capability           | Role                                                                            |
| -------------------- | ------------------------------------------------------------------------------- |
| L1 Indexer           | Query Bitcoin L1 UTXO, assets, confirmations, and spent state                   |
| L2 Indexer           | Query SatoshiNet UTXO, transactions, contracts, channels, and cross-layer state |
| STP State            | Understand channels, splicing, unlock, lock, close, and pending transactions    |
| Wallet Authorization | Keep signing, seed phrases, and passwords inside the wallet safety boundary     |
| Explorer Links       | Provide verifiable evidence for users and support teams                         |