Fractal Bitcoin
  • Welcome to the Fractal Documentation
  • Everything you want to know about Fractal
  • Fractal Tokenomics
  • dev
    • Developer Home
    • brc-20 on Fractal
    • Runes on Fractal
    • Wallet Integration with Fractal
    • Full Node Configuration
  • MINING
    • How to Mine
    • Fractal Bitcoin (FB) Mining Q&A
    • Understanding Cadence Mining: How Fractal Innovates on Bitcoin's Security Model 🔒
  • Knowledge Base
    • Fractal Vote Explained
  • User guides
    • How to send / receive FB with self-custody wallets?
    • How to inscribe Ordinals?
    • How to trade Ordinals?
    • How to interact with PizzaSwap?
    • How to use the Simple Bridge?
    • How to use the Bool Bridge?
    • How to Interact with Runes?
      • How to Etch Runes?
      • How to Mint Runes?
      • How to Trade Runes?
    • Understanding CAT Protocol
      • How to send / receive CAT20?
      • How to Buy and Sell CAT on UniSat CAT Market?
    • How to Participate in the Fractal Vote?
  • Learn
    • Understanding BRC20: Experimenting with the Bitcoin Script
    • Understanding Runes: Making BITCOIN Fun Again
    • Understanding CAT Protocol: The Latest Player in Bitcoin Token Standards
    • What is OP_CAT?
    • Alkanes on Bitcoin: Fueling Smart Contracts on Bitcoin Natively
    • Bitcoin Script: A Comprehensive Primer for Developers
    • Understanding Goldinals: Building Trust-Minimized Tokens on Bitcoin and Fractal
    • Bitcoin’s Data Debate: The OP_RETURN Policy Shift, Explained
  • FAQ
    • Fractal Telegram AMA Review - Mar. 15
    • Fractal Community Q&A Summary - Sept. 22
    • Fractal Vote - FAQ
  • TESTNET
    • Participate in Public Testing
Powered by GitBook
On this page

FAQ

This FAQ is designed to address common questions from the community, offering clear and concise answers about Fractal's features, future developments, and overall ecosystem.

PreviousBitcoin’s Data Debate: The OP_RETURN Policy Shift, ExplainedNextFractal Telegram AMA Review - Mar. 15

Last updated 8 months ago

📍 Q: How does Fractal prevent against replaying transactions to BTC nodes?

A: Fractal is not a Bitcoin fork and does not use Bitcoin's UTXO set. Therefore, any transaction within a Fractal block cannot be included on the Bitcoin chain. The main concern isn't transaction replay, but rather protecting against malicious websites attempting to use Bitcoin mainnet UTXOs to trick Fractal wallets into signing unauthorized transactions.


📍 Q: OP_CAT has been enabled in previous forks, but no significant new use cases emerged. Why would Fractal Bitcoin be different?

A: Times have changed. Back then, all opcodes were available, and there was no space constraint, so developers had little motivation to explore "how far we can go with only OP_CAT." Today, with the support of SegWit and Taproot in the current Bitcoin Core versions, scripts can be more controlled and isolated, allowing for the creation of more flexible business logic.

Soon, you'll see the first use case on Fractal: staking and voting mechanisms based on Bitcoin scripts and implemented with OP_CAT. This solution avoids the limitations of time-locks (enabling free staking and unlocking) and works without relying on third-party oracles. It’s a technical feat that cannot be achieved on Bitcoin mainnet today, but with OP_CAT, we can accomplish it easily. An unlocking transaction has a vsize of around 340 bytes.

🔗


Check out the transaction example here