> 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/developer-center/contract-template-catalog.md).

# Contract Template Catalog

This page summarizes SatoshiNet smart contract templates, runtimes, and testnet entries. For more detailed protocol rules, see [Smart Contract Protocol](/english/protocol-and-security/smart-contracts/contracts.md).

## Current Status Matrix

| Type                              | Status                          | Testnet Entry                                                                                                    | Notes                                                                                                                   |
| --------------------------------- | ------------------------------- | ---------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| Agent / Prediction Contract       | Implemented / Testing           | [Prediction Contract Test](/english/use-satoshinet/prediction-contract.md)                                       | First public testnet validation scenario                                                                                |
| Template Contract: AMM            | Implemented / Testnet Iterating | PWA `Tools -> Smart Contracts`, [Deploy AMM Pool](/english/developer-center/amm-pool-quickstart.md)              | Smart contract template test capability, not market AMM                                                                 |
| Template Contract: LimitOrder     | Implemented / Testnet Iterating | PWA `Tools -> Smart Contracts`, [Deploy Limit Order Module](/english/developer-center/limit-order-quickstart.md) | Smart contract template test capability, not market limit order                                                         |
| Template Contract: Asset Exchange | Implemented / Testnet Iterating | To be added                                                                                                      | Fixed-rule asset exchange scenario                                                                                      |
| Template Contract: Autopay        | Implemented / Testnet Iterating | To be added                                                                                                      | `autopay.tc`, pays a fixed or linear fee to one configured recipient by block height                                    |
| EVM Runtime                       | Implemented / Testnet Iterating | [EVM Developer Preview](/english/developer-center/evm-quickstart.md)                                             | Reuses Solidity / EVM ecosystem; invocation uses ABI calldata, and asset settlement still follows SatoshiNet UTXO model |
| EVM Sample: ConstantProductAMM    | Implemented / Testing           | PWA `Tools -> Smart Contracts`, [EVM Sample Contracts](/english/developer-center/evm-sample-contracts.md)        | Solidity AMM standard sample, not market AMM                                                                            |
| EVM Sample: LimitOrderBook        | Implemented / Testing           | PWA `Tools -> Smart Contracts`, [EVM Sample Contracts](/english/developer-center/evm-sample-contracts.md)        | Solidity limit order standard sample, not market limit order                                                            |

## Template Documents Should Include

Each template contract should eventually include:

1. Contract type and template name.
2. Deployment parameters.
3. Invocation interfaces.
4. Input asset rules.
5. Result TX output rules.
6. Permission boundary.
7. Fees and GAS.
8. Explorer / Indexer verification method.
9. Testnet contract address or example txid.
10. Known limitations.

## Current Priorities

1. Prediction contract: complete user testing, deployer quickstart, and testnet evidence.
2. AMM template contract: complete deployment, swap, add liquidity, remove liquidity, and verification flow.
3. LimitOrder template contract: complete order creation, filling, cancellation, and Result TX verification flow.
4. Autopay template contract: complete deployment, funding, per-block payment, close, and Result TX verification flow.
5. EVM sample contracts: add testnet addresses, txids, calldata generation records, and Explorer evidence for `ConstantProductAMM` and `LimitOrderBook`.
6. EVM Runtime: add RPC, Chain ID, example repo, Solidity deployment flow, estimate flow, and ABI calldata invocation flow.

**Page Status: Planning**