Why Bitcoin L1?
Catpound Finance runs directly on Bitcoin Layer 1 through OPNet -- not on a sidechain, not through a bridge, and not via inscriptions. This page explains why that matters and how it compares to yield optimizers on other chains.
What Is OPNet?
OPNet is a smart contract platform that operates directly on Bitcoin's proof-of-work blockchain. Contracts are written in AssemblyScript, compiled to WebAssembly (WASM), and their calldata is encoded using Tapscript. This means:
- Bitcoin PoW security: Every transaction is validated and secured by Bitcoin miners.
- No bridge risk: Your assets never leave Bitcoin L1. There is no custodial bridge, wrapped token, or cross-chain relay that could be exploited.
- No separate gas token: Transaction fees are paid in BTC. You do not need to acquire a separate token to interact with the protocol.
- Non-custodial by design: OPNet contracts verify that expected Bitcoin outputs exist in a transaction. They never hold or custody BTC directly.
Quantum-Resistant Signatures
OPNet supports ML-DSA (FIPS 204), a post-quantum digital signature algorithm standardized by NIST. Alongside traditional ECDSA and Schnorr signatures, this provides forward-looking security against future quantum computing threats. OPWallet automatically manages signature selection for you.
How Catpound Leverages Bitcoin
The Catpound vault contract:
- Lives on Bitcoin L1 as a WASM smart contract, executed by the OPNet consensus layer
- Uses the OP20 token standard (Bitcoin's equivalent of ERC-20) for the cpMOTO share token
- Interacts with MotoChef (staking) and MotoSwap (DEX) via cross-contract calls -- all on-chain
- Enforces all rules (fees, tiers, withdrawal logic) at the contract level with SafeMath and reentrancy protection
Comparison: Bitcoin L1 vs EVM Yield Optimizers
| Feature | Catpound (Bitcoin L1) | EVM Optimizers (Beefy, Yield Yak) |
|---|---|---|
| Base chain security | Bitcoin PoW | Varies (Ethereum PoS, alt-L1s, L2 rollups) |
| Bridge required | No | Often (for cross-chain vaults) |
| Gas token | BTC | ETH, AVAX, MATIC, etc. |
| Smart contract language | AssemblyScript (WASM) | Solidity (EVM) |
| Token standard | OP20 | ERC-20 |
| Quantum resistance | ML-DSA supported | Not available |
| Custody model | Verify-don't-custody | Contract holds tokens |
| Ecosystem maturity | Early stage | Established |
OPNet is newer infrastructure compared to Ethereum. This comes with the benefits of Bitcoin-native security and the trade-offs of a smaller ecosystem. See the Risks page for a candid assessment.