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

# Contracts guides

> All contract guides, concepts, and references: deploy flow, system modules, JSON-RPC compatibility, and Ethereum differences.

Every guide, concept, and reference under the Contracts tab, grouped by what you're trying to do.

## Build and ship a contract

<CardGroup cols={3}>
  <Card title="Deploy" icon="rocket" href="/en/tutorial/smart-contract">
    Scaffold a Foundry project and deploy Counter to Stable testnet.
  </Card>

  <Card title="Verify" icon="check-circle" href="/en/how-to/verify-contract">
    Upload source to Stablescan so users can read and call your contract.
  </Card>

  <Card title="Index events" icon="activity" href="/en/how-to/index-contract">
    Build a live event stream with ethers.js, plus historical backfill.
  </Card>
</CardGroup>

## Call system modules

<CardGroup cols={2}>
  <Card title="Use system modules" icon="cpu" href="/en/how-to/use-system-modules">
    Call Bank, Distribution, and Staking precompiles from Solidity or ethers.js.
  </Card>

  <Card title="Track unbonding completions" icon="clock" href="/en/how-to/track-unbonding">
    Subscribe to the UnbondingCompleted event emitted via the StableSystem precompile.
  </Card>
</CardGroup>

## Reference

<CardGroup cols={2}>
  <Card title="System modules reference" icon="book-open" href="/en/reference/system-modules-api-overview">
    Precompile addresses and per-module ABI pointers.
  </Card>

  <Card title="JSON-RPC API" icon="code" href="/en/reference/json-rpc-api">
    Supported `eth_*`, `net_*`, `web3_*`, and `debug_*` methods.
  </Card>
</CardGroup>

## Foundation concepts

<CardGroup cols={2}>
  <Card title="USDT0 behavior on Stable" icon="scale" href="/en/explanation/usdt0-behavior">
    Dual-role balance, reconciliation events, and contract design rules.
  </Card>

  <Card title="Difference from Ethereum" icon="git-compare" href="/en/explanation/ethereum-comparison">
    Gas token, finality, priority tips, and EVM compatibility.
  </Card>
</CardGroup>