Misha Komarov, founding father of the cryptographic analysis agency alloc init, offered this April 29 on the Bitcoin 2026 occasion in Las Vegas a know-how referred to as PIPEs v2.
The proposal seeks to resolve two limitations of Bitcoin: the impossibility of programming superior spending situations with out modifying the protocol, and the problem of integrating zero-knowledge proofs (ZK proofs), cryptographic proofs that let you confirm that one thing is true with out revealing the underlying info, instantly in mainnet transactions.
The acknowledged limitations originate from the Bitcoin programming language, which is intentionally easy and helps some fundamental spending situationsakin to blocking funds till a sure date (the mechanism that inheritance wallets use to switch bitcoin to a beneficiary after the proprietor’s loss of life).
That simplicity results in extra advanced situations, akin to releasing funds provided that an arbitrary cryptographic check is met, not attainable with out modifying the protocol guidelines. Some builders, like these behind PIPEs v2, are dedicated to increasing this programmability with out touching the consensus.
How does PIPEs v2 work in Bitcoin?
Each transaction in Bitcoin requires a digital signature, produced with a personal key that solely the proprietor of the funds is aware of. PIPEs v2 acts exactly on this level. As an alternative of asking Bitcoin to test a further situation (one thing the protocol can not do with out being modified), PIPEs v2 Cryptographically locks the personal key behind a predefined situationin line with its technical doc, printed final February.
The mechanism that makes this blocking attainable is named token encryption (witness encryption), a cryptographic scheme that encrypts the signing key in order that it could actually solely be recovered if the particular person making an attempt to spend the funds can reveal that the acknowledged situation is met.
If the situation is glad, the bottom line is launched and the signing can happen. If not, it’s mathematically infeasible. From Bitcoin’s perspective, the transaction seems like every other: a typical signature beneath a typical public key.
Concerning the mixing of zero-knowledge proofs into Bitcoin transactions, they’d be used, for instance, to confirm that a person meets an eligibility situation with out disclosing what that situation is and with out the principle community having to do this work. Token encryption would clear up it off-chain.
Handan Kılınç Alper, cryptographer and researcher on the PIPEs v2 group, summarized the precept behind the method:
If signature validity is the one situation that Bitcoin verifies, then probably the most highly effective spending coverage we are able to implement with out modifying the protocol is one which controls whether or not a sound signature may be generated.
Handan Kılınç Alper, criptógrafa de alloc init.
In return, and after the presentation, Peter Todd, one of many historic builders of Bitcoin Core, commented: “By no means underestimate lunar arithmetic.” The expression, which within the cryptocurrency ecosystem alludes to developments that appear unattainable till they’re confirmed viablesummarizes the issues that, in Todd’s imaginative and prescient, PIPEs v2 should overcome, since it might be a mathematically sound proposal whose sensible viability at scale has but to be demonstrated.
What’s PIPEs v2 for in follow?
In accordance with its doc, the PIPEs v2 mechanism opens the door to make use of circumstances that in the present day require modifications to the protocol or extra advanced mechanisms.
Probably the most particular are safety vaults (vaults in English). These are contracts that permit funds to be locked with strict withdrawal situations, akin to requiring cryptographic proof or a ready interval, with out anybody having the ability to transfer them earlier than that situation is met. It might additionally allow managed outputs of second layer (L2) protocols, akin to Lightning Community (LN).
Nevertheless, in line with the alloc init group, PIPEs v2 is at present analysis in progress. The present execution price is between USD 100 and USD 200 per operation in cloud computing infrastructure, viable for top worth circumstances however not for on a regular basis usewhereas the group works on optimization strategies that would cut back it.
