Bitcoin DeFi uses Bitcoin transactions, scripts, and supporting protocols to deliver financial applications. This guide explains the roles of Taproot, PSBTs, and DLCs, then shows how Liquidium.WTF uses shared-signature escrow for BTC loans.
For an overview of BTCFi use cases and the wider ecosystem, read our BTCFi guide. Here, we focus on the transaction mechanisms.
TL;DR:
- Bitcoin DeFi (BTCFi) enables lending, borrowing, and trading directly on Bitcoin's network.
- Innovations like Taproot, PSBTs, and DLCs have expanded Bitcoin's capabilities for DeFi applications.
- Liquidium.WTF connects BTC lenders with borrowers who pledge selected Ordinals or Runes as collateral.
- BTCFi provides a secure, decentralized alternative to Ethereum-based DeFi, leveraging Bitcoin's robust security and decentralization.
What Is Bitcoin DeFi?
Bitcoin DeFi refers to a growing class of financial tools built natively on the Bitcoin blockchain. Historically, Bitcoin was seen as "digital gold" with limited programmability compared to chains like Ethereum. But that narrative has changed.
Thanks to the Taproot upgrade and new protocols like Ordinals and Runes, Bitcoin is now host to an emerging decentralized finance ecosystem. BTCFi lets users borrow, lend, and trade—without wrapping assets or using centralized intermediaries.
At its core, Bitcoin DeFi leverages the same principles that made Bitcoin revolutionary: decentralization, censorship resistance, and trustless transactions. But it adds new functionality using tools that respect Bitcoin's base-layer constraints while pushing its capabilities forward.
How Bitcoin DeFi Works
Bitcoin DeFi doesn’t rely on complex virtual machines or centralized smart contracts. Instead, it builds on the fundamentals of Bitcoin's architecture, enhanced by recent innovations:
Taproot: Unlocking Smart Contract Potential
Taproot, activated in 2021, was a major upgrade that made Bitcoin transactions more private and efficient. More importantly, it expanded what's possible with Bitcoin scripts, enabling basic smart contract functionality that powers many BTCFi protocols.
PSBTs: Coordinating Bitcoin Signatures
Partially Signed Bitcoin Transactions (PSBTs) let participants review a Bitcoin transaction and add their signatures without sharing private keys. Liquidium.WTF uses this signing workflow to coordinate loan transactions.
DLCs: Smarter Contracts with Real-World Conditions
Discreet Log Contracts (DLCs) enable contracts that only execute based on real-world data, like BTC price. Think of them like conditional bets or hedging tools that settle on-chain without revealing sensitive info.
Assets on Bitcoin: Ordinals, Runes, and BRC-20s
Bitcoin-native assets are now possible thanks to:
- Ordinals, which inscribe data (like images or text) on individual satoshis
- Runes, a streamlined fungible token protocol designed to replace BRC-20s
- BRC-20, a proof-of-concept fungible token system built on top of Ordinals
These protocols create different kinds of Bitcoin assets. Liquidium.WTF accepts selected Ordinals and Runes as collateral; BRC-20 tokens are not eligible.
The combination of Taproot, PSBTs, DLCs, and asset protocols means Bitcoin DeFi can now support complex use cases while staying true to Bitcoin's ethos.
How Liquidium.WTF uses Bitcoin transactions
Borrowers and lenders agree on the BTC amount, interest, and duration. The collateral stays in a 2-of-3 Bitcoin escrow involving the borrower, lender, and Liquidium.WTF oracle. The oracle supports settlement according to repayment or default.
For Instant loans, lenders fund BTC vaults and the ICP signing system activates accepted offers. Manual loans require a lender countersignature. Both modes support selected Ordinals and Runes.
Bitcoin miners confirm transactions in blocks. The mempool holds transactions waiting for confirmation.
FAQ: Bitcoin DeFi
Q: How does Liquidium.WTF secure loan collateral? A: Bitcoin escrow uses shared signatures from the borrower, lender, and Liquidium.WTF oracle to settle repayment or default.
Q: Which wallets can I use with Liquidium.WTF? A: Connect to the Bitcoin market with Xverse, UniSat, Leather, OKX, or Wizz Wallet.
Q: Can I use any Ordinal or only certain collections?
A: Liquidium.WTF currently supports select top-tier collections. Check the supported assets list before borrowing.
Q: What happens if a borrower doesn’t repay?
A: The lender unlocks the collateral, which is held in a smart contract until loan repayment or default.
Q: What can I do on Liquidium.WTF? A: Borrow BTC against selected Ordinals and Runes, or lend BTC against those assets with agreed interest and duration.
“Bitcoin DeFi is not just a trend; it's the evolution of financial sovereignty on the most secure blockchain.” — Liquidium.WTF Founder
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