Perth BitDevs

Thursday 2 July 2026 · 6pm · Rocky Ridge, Burswood

In Brief

Bitcoin Core - privatebroadcast IP-leak fix, BIP-452 P2P UTXO sharing, wallet/dependency work, and meta#46 process debate
Project Loupe - LDK v0.2.3 security fixes, DoS/panic cluster, MPP correctness and BOLT12 interop
Funding - Maelstrom annual report, OpenSats LTS for Utreexo's Calvin Kim, Brink's Hornet and Bedrock
Privacy - Marmot v2 specs, Payjoin to Cashu (CDK PR2049, BIP77)
Self-custody - AUSTRAC Travel Rule from 1 July and Bitaroo's SHAZAM opt-out, libssh2 RCE, Ledger mail scam
Network - b10c outbound connection-success rates, first ASmap dashboard

Presenter - frequent participant OT
Frame - how Stacker News works as a Bitcoin-native discussion site
Questions - incentives, moderation, identity, rewards and what makes it different from normal social platforms

The August Fork

BIP-110 - mandatory-signaling window near block 961,632 (about 7 Aug) at near-zero hashrate (late June 2026); no Core enforcement
Drivechain spinoff - BIP-300 is the Drivechains soft fork; a separate hard-fork spinoff (new SHA-256d chain, 1:1 airdrop) is floated for late August
Opposition - Adam Back and Jameson Lopp on chain-split risk
Backdrop - Blockspace Weekly's Alkanes data; the Segregated Data prunable-region proposal
Fork day - the BNOC / b10c monitoring and replay-tracking plan

Stratum V2

The milestone - GoMining mined the first known live block with miner-selected transactions via SV2 job declaration (25 June, DMND pool)
Why it matters - job declaration moves transaction selection from the pool to the individual miner
Who runs it - ~7 pools (~75% hashrate) joined the SV2 working group; only Braiins and DMND run it natively; OCEAN uses DATUM
The stack - SRI v1.10.0 libraries and v0.5.0 apps; Bitcoin Core Mining IPC submitBlock (#34644)
The debate - Luke Dashjr (Ocean) on SV2 vs DATUM for real miner template control

Post-Quantum Migration

Output type - P2MR (BIP-360) vs P2TRv2 under Wuille's Never / Later / Now framing
Giving it teeth - Tripwire and Miner Lockdown for triggering EC disabling (Wuille, Dryja, Sjors)
BIP-360 update - PR #2198 merged (depth-zero trees anyone-can-spend); P2MR overhead vs P2TRv2 down to ~32 weight units (~8 vbytes)
Hash-based sigs - SHRINCS (Blockstream Research) and why stateful signing is hard in practice
Economics - the Quantum Sunset / PACT paper on who actually migrates

State of Layer 2

Ark on mainnet - Second's bark without covenants, plus an African settlement pilot
Covenants - CSFS+CAT on-chain demos and a minimal nSequence bit-21 expiry proposal
BitVM bridges - Union on Rootstock testnet; Liquid names a 1-of-n BitVM bridge as its research-stage successor
Ecash - Cashu NUT-30 on-chain mint/melt, Payjoin to Cashu, Fedimint v2 under WASM
Statechains - Spark's unchanged 2-operator trust model; Mercury Layer goes dark
Wind-down - Botanix closes its Spiderchain; peg out before 9 July