Perth BitDevs

Thursday 4 June 2026 · 6pm · Rocky Ridge, Burswood

NOTE The topic summaries for this month were generated with the assistance of AI and may contain errors.

In Brief

Bitcoin Core - Ancient wallet migration fix, mining IPC submitBlock, Guix manifest split, RBF test cleanup
Verification - b10c's Nix-built bitcoind matches Guix; UltrafastSecp256k1 v4; Harlock secp256k1 notes
Funding orgs - Brink 2025 annual report, Btrust new board and Q1 cohort, 2140 first annual report
Mempool policy - Spiral's "A Decade of Workarounds" retrospective
AI security - Loupe vulnerability discovery tool and AI-assisted wallet recovery
Travel Rule - Australian regulatory developments
Nostr VPN - Martti Malmi's Nostr-coordinated VPN repo
Kagikai - 2-of-3 multisig bearer-instrument design
Zcash upgrade - Orchard soft-fork pause, then NU6.2 hard-fork remediation

Silent Payments

Why now - Sparrow 2.5.0 adds Silent Payments receiving wallets, while 2140's annual report flags ongoing SP work
Protocol shape - static reusable payment address, unique Taproot outputs, no on-chain notification output
Wallet reality - scan/spend key split, recovery, public Electrum infrastructure, and light-client research questions
Discussion prompts - adoption, infrastructure trust, hardware signer UX, and exact feature scope to verify

Post-Quantum Bitcoin

QCAP - Bitcoin-native quantum-canary idea anchored on ECDLP-break uncertainty
Lattices - Delving thread on lattice signatures, threshold questions, and wallet UX
P2WOTS / Lamport - two Delving threads, including a revised Winternitz-style design
Hybrid SPHINCS+ - bitcoindev BIP proposal for SPHINCS+ / secp256k1 paper wallets
ECDSA.fail - measurable circuit-cost challenge for secp256k1 attack research

BIP-110 Watch

Background - Dathon Ohm's draft (BIP-110, assigned 2025-12-03) for a temporary consensus restriction on data-carrying transactions
Where signaling stands - Voluntary bit-4 signaling across the last four retarget periods has not exceeded 0.54%; no major pool has signaled
This window - No new substantive source material since May; mandatory-signaling window (blocks 961,632-963,647) is roughly four to five retarget periods away
Open question - Where relay policy, miner behavior, and social pressure get conflated

Changing Consensus

BIP-54 moved to Complete after rationale, validation-time wording, and reference-implementation edits
BIP-38 / 78 advanced to Deployed; BIP-176 to Complete; BIP-10 closure recorded
BIP-449 assigned to OP_TWEAKADD, with Alpen and MATT compatibility notes in the commit text
Process - a bitcoindev thread reopened BIP 3 and BIPs repository issue-tracking questions

Covenants and Exit Games

CTV-only vault - MCCV v0.1.0 demonstrates deposits, delayed withdrawals, recovery, and velocity control
Sibling-aware covenants - bitcoindev thread compares CTV vs TEMPLATEHASH for BitVM, Ark, and LN-Symmetry designs
Replay protection - Delving thread on split-risk around soft-fork signaling, using Core/Knots as labels
Blockspace limits - "Credible Exit and The Law of Conservation of Blockspace" essay on trust-minimized exits

Network and Lightning

NAT traversal - Delving thread on TCP hole punching for home nodes behind home NATs
Addrman overlap - BNOC measured across nine nodes; Tor-address spike noted in early May
Back-to-back forks - BNOC logged forks at heights 949203 and 949204
Electrum monitoring - new BNOC thread aims to spot public spy-Electrum servers
CLN assertion DoS patched in v26.04; v26.06 RCs ship xpay-by-default and payment-proof work
LND v0.21.0-beta rc1/rc3 plus module releases; Delving routing-economics post