Welcome to Bitfinity, a cutting-edge Layer 2 scaling solution designed to unlock the full potential of Bitcoin. By combining the security and decentralization of Bitcoin with the programmability of Ethereum Virtual Machine (EVM), Bitfinity enables developers and users to build and interact with smart contracts directly on Bitcoin — including support for Ordinals, BRC-20 tokens, and more.
With transaction speeds exceeding 1,000 TPS, Bitfinity delivers high performance while maintaining robust security through innovative cryptographic protocols built on the Internet Computer blockchain.
What Is Bitfinity?
Bitfinity is a Bitcoin Layer 2 network that extends Bitcoin’s capabilities by enabling EVM-compatible smart contracts. This means developers can write decentralized applications (dApps) in Solidity, the same language used on Ethereum, and deploy them to interact natively with Bitcoin and its emerging asset classes like Ordinals and BRC-20 tokens.
Unlike traditional Layer 2 solutions that rely on optimistic rollups or zero-knowledge proofs, Bitfinity uses a unique threshold cryptographic scheme called Chain-Key. This technology powers a decentralized, trust-minimized bridge between the Bitcoin blockchain and Bitfinity.
👉 Discover how Bitfinity enables EVM-powered innovation on Bitcoin today.
How Does Bitfinity Work?
Chain-Key Cryptography: The Backbone of Security
At the heart of Bitfinity lies Chain-Key technology, developed by the Internet Computer Protocol (ICP). This advanced threshold signature scheme ensures that no single node ever has access to the full private key controlling Bitcoin assets on the bridge.
Instead, key shares are distributed across a decentralized network of nodes and regenerated every 11 minutes using secure multi-party computation (MPC) — often referred to as "moon math" due to its complexity. This periodic regeneration prevents long-term key exposure and significantly enhances security.
This system allows Bitfinity to securely custody Bitcoin while enabling seamless cross-chain interactions without relying on centralized custodians.
On-Chain Bitcoin Nodes
One of the most groundbreaking aspects of Bitfinity is its integration with on-chain Bitcoin full nodes running directly on the Internet Computer. Since 2021, engineers have been working to sync real Bitcoin nodes within smart contract environments (canisters), allowing for trust-reduced verification of Bitcoin transactions.
This direct integration eliminates reliance on third-party oracles and enables true interoperability between Bitcoin and EVM-based systems.
Key benefits include:
- Real-time validation of Bitcoin blocks and transactions
- Native issuance of Bitcoin-backed assets (like ckBTC)
- Support for future Taproot-enabled transactions via Schnorr threshold signatures
Getting Started with Bitfinity
Ready to explore Bitfinity? Follow these steps to begin building or transacting on this powerful BTC Layer 2 platform.
Step 1: Connect Your Wallet
Use MetaMask or any compatible EVM wallet to connect to the Bitfinity network. Simply add Bitfinity as a custom RPC network in your wallet settings.
Step 2: Get Testnet Tokens
To test dApps or deploy contracts, you’ll need testnet $BTF tokens. Request them from the official Bitfinity Testnet Faucet.
👉 Start building on Bitfinity with testnet funds now.
Step 3: Bridge Assets to Bitfinity
Currently, native Bitcoin (BTC) can be bridged onto Bitfinity. Trustless bridges for BRC-20 tokens and other Bitcoin-native assets are expected to launch soon, expanding the range of programmable assets available on-chain.
Once bridged, these assets can be used in DeFi protocols, NFT marketplaces, and custom smart contracts — all powered by Solidity.
Core Technologies Behind Bitfinity
To fully appreciate Bitfinity’s innovation, it helps to understand the foundational technologies that make it possible.
Threshold ECDSA (tECDSA)
The threshold ECDSA protocol enables multiple parties (nodes) to jointly sign transactions without ever reconstructing the full private key. This ensures that Bitcoin held in custody remains secure even if some nodes are compromised.
Resources:
- Chain-Key Technology Overview
- tECDSA Technical Deep Dive
- Example Rust Code for tECDSA
- Third-party Audit by NCC Group
Bitcoin Integration with Internet Computer
Running Bitcoin nodes directly on a blockchain is no small feat. The Internet Computer achieves this through specialized canister smart contracts that download and validate Bitcoin blocks in real time.
This integration enables:
- On-chain verification of BTC transactions
- Creation of Bitcoin twin tokens (e.g., ckBTC)
- Development of Ordinals marketplaces like Bioniq
Learn more:
HTTPS Outcalls: Oracle-Free Web Connectivity
Bitfinity leverages HTTPS outcalls — a feature of the Internet Computer — to make secure, asynchronous calls to external web APIs without relying on traditional oracles.
This decentralized approach ensures data integrity and removes single points of failure commonly found in oracle-dependent blockchains.
Explore:
Future: Threshold Schnorr Signatures
While current implementations use ECDSA, ongoing research aims to implement threshold Schnorr signatures, which would allow Bitfinity to generate Taproot-compatible transactions.
This upgrade will enable:
- Lower fees and enhanced privacy
- Support for complex scripting via Taproot
- Better scalability for multi-signature setups
Relevant research papers:
- Efficient Schnorr Threshold Signatures (IACR 2023/1019)
- Robust Distributed Signing Protocol (IACR 2023/1175)
Frequently Asked Questions (FAQ)
Q: Can I use MetaMask with Bitfinity?
A: Yes! Bitfinity is EVM-compatible, so any Ethereum wallet like MetaMask works seamlessly once configured with the correct RPC settings.
Q: Is Bitfinity secure?
A: Absolutely. It uses Chain-Key cryptography — a battle-tested threshold signature scheme — with regular key resharing every 11 minutes to prevent compromise.
Q: What assets can I use on Bitfinity?
A: You can currently bridge native BTC. Support for BRC-20 tokens and Ordinals is coming soon.
Q: How fast are transactions on Bitfinity?
A: Bitfinity supports over 1,000 transactions per second, making it one of the fastest BTC Layer 2 networks available.
Q: Do I need to trust a centralized entity when using Bitfinity?
A: No. The bridge is decentralized and secured by the Internet Computer’s node network, eliminating the need for trusted intermediaries.
Q: Can I deploy Solidity smart contracts?
A: Yes! Bitfinity supports full EVM compatibility, so you can deploy existing or new Solidity-based dApps without modification.
Why Bitfinity Matters for Bitcoin’s Future
Bitcoin has long been seen as digital gold — secure, scarce, and decentralized. But it lacks native programmability. Bitfinity changes that by bringing smart contract functionality directly to Bitcoin in a secure, scalable way.
Developers can now build:
- Decentralized exchanges (DEXs) for BRC-20 tokens
- Lending protocols using BTC as collateral
- NFT marketplaces for Ordinals
- On-chain gaming powered by Bitcoin
All while preserving the core values of Bitcoin: decentralization, censorship resistance, and security.
👉 Unlock the next era of Bitcoin innovation — explore what’s possible with Bitfinity.
Final Thoughts
Bitfinity represents a major leap forward in blockchain interoperability. By merging the strengths of Bitcoin and EVM-based development, it opens new frontiers for decentralized applications that were previously impossible.
Whether you're a developer looking to build on Bitcoin or a user wanting greater utility from your BTC holdings, Bitfinity offers a fast, secure, and truly decentralized Layer 2 experience.
Stay updated with official documentation and community resources as new features like BRC-20 bridges and Taproot support roll out in the coming months.