radFi OP_12

radFi utilizes OP_12 as a key component of its Automated Market Maker (AMM) system. Unlike its traditional usage as a simple numeric constant in Bitcoin Script, radFi repurposes OP_12 to encode structured AMM data within dust value outputs. This allows RadFi to facilitate decentralized token AMM using Bitcoin-native transactions.

How radFi Uses OP_12

In radFi’s AMM design, a dust value output containing OP_12 encodes details such as:

• Transaction type (provide liquidity, swap, withdraw liquidity)

• Input and output asset amounts

• Token identifiers

• Trading fee information

• Price range for limit orders (if applicable)

This approach enables fully on-chain AMM execution while remaining lightweight and efficient.

OP_12 Structure

Each radFi transaction contains at least 1 OP_12 data output formatted as follows:

# RadFi AMM Script 
# Example: Swap Rune for BTC
OP_12 # RadFi Flag (Indicates a RadFi transaction)
OP_PUSHBYTES_23 # Mark the size of swap data
02818080b08a83b7f6d39801930a4564ac8636bf020000 # Swap data

Innovating Bitcoin DeFi

radFi’s repurposing of OP_12 for encoding demonstrates how Bitcoin Script can be extended to support DeFi applications on-chain natively, without smart contracts. By embedding structured data in dust UTXOs, radFi enables efficient AMM-based txs while maintaining the security and transparency of Bitcoin’s UTXO model.

For the complete radFi OP_12usage structure, refer to Bitcoin Data Availability.