BIP-110 and the Architecture of Restraint

By Michael P. Di Fulvio · Published May 7, 2026 · 1 min read · Source: Cryptocurrency Tag

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BIP-110 and the Architecture of Restraint

Temporary Script Constraints, Witness Limits, and the Long-Term Security Implications for Bitcoin

Executive Summary

BIP-110 proposes a temporary soft fork—a backward-compatible tightening of Bitcoin’s consensus rules—that would remain active for one year and then automatically expire.

Let this be clear from the beginning:

This is not a hard fork.
This does not split the chain.
This does not rewrite history.
This does not permanently alter Bitcoin’s design space.

It is a one-year constraint window.

The goal is clear: limit the use of large data embedding during consensus, help node operators avoid increasing validation demands, and keep the base layer focused on its money function during a time of changing incentives.

For most users, nothing changes operationally.
The implications are significant for Bitcoin's architecture.

1. The Nature of the Change—Temporary, Backward-Compatible, Deliberate

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