op_ctv still has no technical objections

Nov 27 - Nov 27, 2025

  • The ongoing discussions within the Bitcoin development community have highlighted a general consensus on the necessity for caution and moderation in the implementation of new covenants.

The conversation particularly focuses on the opcode known as op_ctv, which is characterized by its non-recursive nature and inability to be employed for unconventional or potentially hazardous operations. This limitation is viewed not as a drawback but rather as a beneficial feature, ensuring that op_ctv remains merely adequate for its purposes. This restraint is seen as preferable for the initial introduction of such a feature, aiming to avoid complications that may arise from a more complex or powerful system.

Another point of contention is the comparison between op_ctv and the more expansive proposal known as lnhance, which involves three separate opcodes. The complexity of reasoning about lnhance's potential attack surfaces and its comprehensive nature make it a topic of concern, especially when considering the optimization of covenants to suit all conceivable scenarios. The inherent difficulty lies in creating a system that is effective without overburdening the network or making it susceptible to undesirable activities.

Moreover, there is an acknowledgment of the risks associated with the CheckTemplateVerify (CTV) approach, albeit with an emphasis on its relatively low danger level. It is noted that should any significant game theory issues emerge, it would be feasible to disable CTV (thereby preventing new transactions) as a mitigating measure. The discourse also touches upon the broader implications for Bitcoin, particularly the trend towards scaling through custodial systems, which diverges from the decentralized ethos traditionally championed by the community. This shift raises concerns about losing fees and miner support, underscoring a reluctance to deviate from the core values that define Bitcoin.

In conclusion, the dialogue within the Bitcoin Development Mailing List underscores a preference for pragmatism over perfection, as evidenced by the support for an older, extensively reviewed pull request related to covenant opcode. Despite being concise, this proposed change has undergone thorough scrutiny, suggesting a collective desire among developers to tread carefully in evolving Bitcoin's technical landscape. This cautious approach reflects a broader understanding that while innovation is necessary, it must not compromise the foundational principles and operational integrity of the Bitcoin network.

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