GitHub
BIP 360 — Pay to Merkle Root (P2MR)
Proposed Pay-to-Merkle-Root (P2MR), a quantum-resistant output type for Bitcoin. P2MR operates like Taproot but removes the quantum-vulnerable key path spend, committing only to the Merkle root of a script tree. Deployed as SegWit version 2, it provides resistance against long-exposure quantum attacks while maintaining backward compatibility as a soft fork.