[BIP Proposal] Limit ScriptPubkey Size >= 520 Bytes Consensus.

Posted by Garlo Nicon

Oct 3, 2025/07:11 UTC

The discussion revolves around the optimal value for the maximum allowed stack push in Bitcoin's scripting language, with a specific focus on the number "520" being proposed as a safe and battle-tested choice. This figure is deemed to be conservative enough to be accepted as a new consensus rule within the community while still leaving room for adjustment if practical application shows that a lower limit would suffice. The flexibility of lowering this limit in the future is highlighted, albeit with a cautionary note that increasing it once set could pose significant challenges.

Further elaboration touches upon the application of this standard across all relevant scenarios within the Bitcoin ecosystem. It introduces the idea that for use cases requiring larger OP_RETURN values than the one proposed, an alternative solution involving wrapping the script into a TapScript branch and incorporating it into any Taproot address is suggested. This method addresses potential concerns about limitations on data storage within transactions while adhering to the evolving standards of Bitcoin's protocol enhancements.

The communication underscores the collaborative and forward-looking nature of Bitcoin development discussions, illustrating how technical parameters are debated with an eye towards consensus, security, and future scalability. Such exchanges are a testament to the ongoing efforts to refine and enhance Bitcoin's infrastructure to meet the diverse needs of its users while safeguarding the network's integrity and functionality.

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