> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sundialprotocol.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sundial Protocol Docs: Bitcoin Yield on Cardano L2

> Explore Sundial Protocol documentation — stake BTC and ADA for real yield on Midgard L2, integrate with the SDK, or run a network node on Cardano.

Sundial Protocol is a Bitcoin-native DeFi platform that lets you earn yield on BTC and ADA while benefiting from high-throughput Layer 2 infrastructure built on Cardano. Whether you're a user looking to stake, a developer integrating the SDK, or a network participant running a node, this documentation covers everything you need.

<CardGroup cols={2}>
  <Card title="Introduction" icon="sun" href="/introduction">
    Learn what Sundial Protocol is and how it works at a high level.
  </Card>

  <Card title="Quick Start" icon="rocket" href="/quickstart">
    Get up and running with Sundial in minutes.
  </Card>

  <Card title="Testnet Guide" icon="flask" href="/testnet-guide">
    Try Sundial on testnet with free sBTC from the faucet.
  </Card>

  <Card title="Node API Reference" icon="code" href="/api/overview">
    Explore the full Sundial node API endpoints.
  </Card>
</CardGroup>

## Explore by Role

<CardGroup cols={3}>
  <Card title="Stake BTC" icon="bitcoin" href="/guides/stake-btc">
    Lock Bitcoin and earn yield via the BTC Locker protocol.
  </Card>

  <Card title="Stake ADA" icon="coins" href="/guides/stake-ada">
    Stake ADA on Sundial's Layer 2 and earn rewards.
  </Card>

  <Card title="Run a Node" icon="server" href="/guides/operators">
    Operate a Sundial layer node and earn block rewards.
  </Card>

  <Card title="Watch the Network" icon="eye" href="/guides/watchers">
    Submit fraud proofs and earn bounties as a Prover.
  </Card>

  <Card title="Accelerate Transfers" icon="bolt" href="/guides/facilitators">
    Fast-track deposits and withdrawals as a Facilitator.
  </Card>

  <Card title="BTC Locker SDK" icon="wrench" href="/sdk/btc-locker">
    Build Bitcoin staking flows with the BTC Locker library.
  </Card>
</CardGroup>

## Key Protocol Components

<CardGroup cols={2}>
  <Card title="L2 Optimistic Rollup" icon="layer-group" href="/concepts/l2-rollup">
    How Sundial scales Cardano to 2,000–5,000 TPS with fraud proofs.
  </Card>

  <Card title="Charms Bridge" icon="bridge" href="/components/charms-bridge">
    Cross-chain Bitcoin transfers using zk-SNARK verification.
  </Card>

  <Card title="Alchemy (FIRE & ICE)" icon="fire" href="/components/alchemy">
    Bitcoin reserve assets offering differentiated risk/reward profiles.
  </Card>

  <Card title="Fraud Proofs" icon="shield-check" href="/components/fraud-proofs">
    How the network detects and penalizes invalid blocks.
  </Card>
</CardGroup>