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December 2025

Perth BitDevs

December 2025 · First Thursday of the month
Topics Discussed
16 topics
@deadmanoz

Lava Service Changes Custody Arrangements

Lava offered self-custody loans using DLC (discrete log contracts). An update changed this from a non-custodial setup to a fully trusted and custodial model, with Lava now having full control over users’ funds. This fundamental change was not clearly communicated to users in the upgrade process. Lava stated they no longer use DLCs because the technology doesn’t meet their security standards, citing client-side key risk, hot keys, and oracle manipulation vulnerabilities.

@NoSandMan

BIP-444 On-chain Bets with Rob Hamilton

Discussion of on-chain betting mechanisms related to BIP-444 outcomes.

@NoSandMan

On-chain Examination of Lava’s Custody Change

On-chain analysis of Lava’s custody transition. The "upgrade" address reveals that originally loans were self-custodial with collateral locked in a 2-of-2 multisig. Post-"upgrade," funds are held in a pooled single-sig address that regularly consolidates to Kraken.

@deadmanoz

Samourai Wallet Dev (Keonne Rodriguez) Sentenced to 5 Years

Keonne Rodriguez has been sentenced to 5 years in prison and fined $250,000 for conspiracy to operate an unlicensed money transmitting business. This was the maximum sentence possible.

@deadmanoz

Interface to Bitcoin Core’s Consensus Code Exposed as C Header API

Bitcoin Core’s consensus code is now exposed as a C header API, making it accessible to other implementations and languages.

@NoSandMan

Mononaut Surveys the Bitcoin Blockchain to Quantify BIP-444 Impact

A series of tweets where the impact of each BIP-444 rule is assessed by considering how many and which Bitcoin transactions would be affected.

@NoSandMan

Spiral Resources to Help Orange Pill Merchants

"Help anyone make the case to merchants that only bitcoin can defeat credit card fees." Spiral (of Block) has released resources for merchant adoption.

@NoSandMan

Ordiknots - Embed Data in "BIP-444 Friendly" Techniques

A tongue-in-cheek project from Taproot Wizards showing how to embed data in a manner that would still be permissible were BIP-444 changes to be activated. Data embedding is possible via P2WSH CHECKMULTISIG and chained OP_RETURN.

@NoSandMan

Dickbutt "Knotwork" Example (from Ordiknots)

"It’s a 2785 byte JPEG of a dickbutt, securely embedded in 88 fake pubkeys via a bunch of P2WSH multisigs. Yes, it’s completely standard. Yes, it gets the witness discount. No, BIP-444 doesn’t fix this."

Dickbutt knotwork
@NoSandMan

Bringing Zero Knowledge Proofs to Cashu

"This would allow arbitrary ecash spending conditions without revealing the script to the mint, maintaining excellent user privacy."

@NoSandMan

Valid Pubkeys Can Still Carry Data

A script that can convert any data (e.g. a Dickbutt image) into valid secp256k1 compressed public keys. This means any checks to see if keys are valid is incapable of preventing the keys from being data-carrying.

@NoSandMan

Bitcoin Core Security Audit

Security assessment report for Bitcoin Core published by OSTIF.

@NoSandMan

Historical Examples of the White Paper Being Inscribed On-chain

@NoSandMan

Bitcoin Knots Commit

Notable commit in the Bitcoin Knots repository.

@NoSandMan

Cluster Mempool Merged

The cluster mempool implementation has been merged into Bitcoin Core, a long-anticipated improvement to mempool management.

@NoSandMan

xgrind