The Grand Script Renaissance — Last Week in Bitcoin (Mar 23 - 29)

Mar 30, 2026

Highlights from the bitcoin developer ecosystem...

Hi Insiders. This is Tuma, open-source reporter from the Insider Edition. I spent 10+ hours in open-source developer calls in the Bitcoin ecosystem last week. Here is what caught my eye:

v0.3.1 of Stratum V2 Applications was released to address some issues in v0.3.0.
- During the weekly call, on Tuesday 24th, Stratum V2 contributors discussed the need to publish a patch version for v0.3.0 of the Applications library. The patch was later released on Friday 27th.
- The main fix pushed is related to a race condition on chain tip updates in the Job Declarator message flow. Specifically, the error seems linked to the bitcoin_core_sv2 crate design, which needs many workarounds to work correctly with Bitcoin Core.
- According to the developers, these workarounds could be dropped and the crate design simplified as soon as draft PR34020 in Bitcoin Core gets merged and released, which is expected to happen in v32.
PR348 in the NUT repository adds BIP321 to the Cashu protocol specifications.
- During the monthly community call, on Thursday 26th, Cashu developers discussed the recently-merged PR348, which adds BIP321 to the NUT specifications.
- This PR modifies NUT26, which defines Bech32m encoding for payment requests. In particular, it adds a section specifying how to create BIP321 payment requests. This BIP introduces a Universal Resource Identifier (URI) scheme for Bitcoin payments, encoding multiple types of Bitcoin payments, such as on-chain, LN, or Cashu, in a single, unified QR code.
- What is cool about the tech: BIP321 allows to improve the UX of Bitcoin payments, providing a layer-agnostic method for receiving Bitcoin.

A BIPs Update

In the last days there was some movement in the BIP repository. Specifically, 2 new BIPs have been assigned a number by BIP maintainer Murchandamus. These BIPs belong to the so-called “Great Script Restoration” (or “Grand Script Renaissance” as AJ Towns framed it), a proposal that was first presented during Bitcoin++ Austin in 2024.

Published BIPs

A list of recently published BIPs

No new BIPs were published during the last week.

Numbered BIPs

A list of BIPs that recently got assigned a number

BIP440: Varops Budget For Script Runtime Constraint

Authors: Rusty Russel, Julian Moik

Assigned On: March 25th, 2026

Layer: Consensus (Soft Fork)

PR2118 introduces BIP440, which defines a varops budget, a generalization of the sigops budget introduced in BIP342 for non-signature operations. This BIP aims to provide an explicit cost framework that uses the length of the stack inputs to limit the amount of operations allowed in a script to ensure rapid evaluation.

BIP441: Restoration of disabled script (Tapleaf `0xC2`)