Announcements

Please join us for our next Socratic Seminar. A special thank you to our host location The Candy Factory!

Please note the start time! We will open doors at 7pm for socializing, and plan on starting the discussion around 7:30pm.

Presentation

• AlbyGo and Olympus making running a bitcoin node easy

In the news

• Bessent says “we’re not buying”
• Gold re-valuing hopium
• You can now edit your recurring buy
• A Post Quantum Migration Proposal
• Transactions paying less than 1 s/B fees getting confirmed by Luxor
• U.S. House of Representatives Announces Week of July 14th as “Crypto Week”
• Qubic has reached over 51% of Monero’s hashrate, effectively giving it control of the network.

Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• Revisiting secp256r1 signatures (i.e. P256, mobile HSM support)
• Make pathological transactions with more than 2500 legacy signature operations non-standard
• Taproot is post-quantum secure when restricted to script-path spends
• (bitcoindev) libsecp256k1 v0.7.0 released
• New BIP Editors: 1 Year Later
• Human meaningful witness versioning
• (BIP Proposal) Proof-of-Activity Reclamation (PoAR)
• A Taproot-native (re-)bindable transaction bundle proposal
• (BIP Proposal) Compressed Base58 Encoding for BIP-39 Mnemonics with Multisig Extensions
• RGB consensus layer released for production deployments
• What’s a good stopping point? Making the case for the capabilities enabled by CTV+CSFS
• (taproot)[script] 4-leaf Taproot Merkle Tree in Python: testnet implementation + control block analysis
• Changes to BIP-360 - Pay to Quantum Resistant Hash (P2QRH)
• Proposal for Decentralized Satellite-Based Bitcoin Nodes
• Bitcoin Core 28.2 Released
• Descriptors using H as a hardened indicator

Delving Bitcoin

• New paper on Proof of Usable Work
• Disclosure: LND gossip_timestamp_filter DoS
• Post-Quantum HD-Wallets, Silent Payments, Key Aggregation, and Threshold Signatures
• Augur: Block’s Open Source Bitcoin Fee Estimation Library
• Chain Code Delegation: Private Access Control for Bitcoin Keys
• Building Secure and Watchtower-efficient Bitcoin Payment Channels with BitVMX
• RGB consensus production release v0.12
• Exploring Extended Relative Timelocks
• Stealth addresses using nostr
• Changes to BIP-360 - Pay to Quantum Resistant Hash (P2QRH)
• Understanding and Mitigating a OP_CTV Footgun: The Unsatisfiable UTXO
• A rust library to encode descriptors with a 30-40% size reduction
• Reimagining Onion Messages as an Overlay Layer
• Fingerprinting nodes via addr requests

Meetings

• Bitcoin Core general developer meetings
  • June 26
  • July 3
  • July 10
  • July 17
  • July 24
• Lightning Specification meeting
  • June 30
  • July 14
  • July 28

Optech

• Bitcoin Optech Newsletter #364
• Bitcoin Optech Newsletter #363 - Recap Podcast
• Bitcoin Optech Newsletter #362 - Recap Podcast
• Bitcoin Optech Newsletter #361 - Recap Podcast
• Bitcoin Optech Newsletter #360 - Recap Podcast

Network Data

• What Network Activity Says About Changing Face of Bitcoin Users

CVEs and Research

Research

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InfoSec

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Pull Requests and repo updates

Bitcoin Core

• wallet: Remove upgradewallet RPC
• fuzz: Make process_message(s) more deterministic
• wallet, rpc: Move (Un)LockCoin WalletBatch creation out of RPC
• test: check proper OP_2ROT behavior
• Enable -natpmp by default
• tests: speed up coins_tests by parallelizing
• policy: make pathological transactions packed with legacy sigops non-standard
• Cluster linearization: separate tests from tests-of-tests
• rpc: use CScheduler for relocking wallet and remove RPCTimer
• mempool: Avoid needless vtx iteration during IBD
• (IBD) multi-byte block obfuscation
• p2p: improve TxOrphanage denial of service bounds
• log: Mitigate disk filling attacks by rate limiting LogPrintf, LogInfo, LogWarning, LogError
• util: explicitly close all AutoFiles that have been written
• Resolve guix non-determinism with emplace_back instead of push_back
• wallet: remove dead code in legacy wallet migration
• validation: Add eligible ancestors of reconsidered block to setBlockIndexCandidates
• mempool: use FeeFrac for ancestor/descendant score comparators
• rpc: Use type-safe exception to pass RPC help
• wallet: Remove ISMINE_WATCHONLY and watchonly from RPCs
• cluster mempool: add TxGraph reorg functionality
• threading: use correct mutex name in reverse_lock fatal error messages
• p2p: add more bad ports
• wallet: Always set descriptor cache upgraded flag for new wallets
• depends: Override host compilers for FreeBSD and OpenBSD
• wallet: migration, avoid creating spendable wallet from a watch-only legacy wallet
• feature_taproot: sample tx version border values more
• wallet: Keep track of the wallet’s own transaction outputs in memory
• p2p: Add witness mutation check inside FillBlock
• rest: fetch spent transaction outputs by blockhash
• test: added fuzz coverage for consensus/merkle.cpp
• blocks: force hash validations on disk read
• node: cap -maxmempool and -dbcache values for 32-bit
• depends: Build qt package for FreeBSD hosts
• wallet, rpc: Remove deprecated balances from getwalletinfo and getunconfirmedbalance
• wallet: Remove CWalletTx::fTimeReceivedIsTxTime
• build: add root dir to CMAKE_PREFIX_PATH in toolchain

Bitcoin Core App (QML-GUI)

• Add cmake, qt6, and bitcoin core submodule

BDK

• Add TxGraph::get_last_evicted
• refactor(electrum): remove unwrap()s and expect()s
• keychain_txout: apply_changeset restores spk cache before last revealed
• Disallow unconfirmed coinbase
• How can we be happy if clippy is not?
• feat: add justfile
• esplora: chain_update errors if no point of connection
• test for excluded bounds in outputs_in_range
• feat(electrum): optimize merkle proof validation with batching

rust-bitcoin

• Add Arbitrary impl for BlockHash, TxMerkleNode, and Wtxid
• Move locktime and sequence to units
• Use Self in script Builder
• bitcoin: Add public ext modules
• feat(p2p): create NetworkExt trait for default P2P port and Magic values
• Add Coinbase(Transaction) newtype to distinguish coinbase transactions
• Update NumOpResult arbitrary impl to only consume 1 byte of entropy
• Remove CheckedSum trait
• Add Arbitrary impl for relative::LockTime
• fix: preserve embedded nulls in CommandString for consensus validation
• bitcoin: Remove re-export of Denomination
• Inline script_pubkey extension traits
• Kill new mutants
• Remove match arm and guard mutant exclusion
• units: Test generic Add and Sub
• Saturate iwp constructors to u32 max
• psbt: check that non-witness UTXOs’ txids match the input txid
• Add tests to kill mutants
• Use new type names instead of deprecated aliases

libsecp

• release: Prepare for 0.7.0
• musig/tests: initialize keypair
• build: Refactor visibility logic and add override
• cmake: support the use of launchers in ctest -S scripts
• cmake: configure libsecp256k1.pc during install
• cmake: Emulate Libtool’s behavior on FreeBSD
• cmake: add a helper for linking into static libs
• README: add link to musig example

Core Lightning

• clnrest: add more request and response types
• wss-proxy: replaced by a rust version
• Askrene: prune and cap
• Askrene single path solver
• Askrene algorithm switcher
• askrene: add runtime of getroutes to the logs
• cln-plugin: don’t panic if notification handler returns error
• logs: A basic javascript log viewer
• hsmtool: implement new derivetoremote method
• Document listsendpays amount msat better

eclair

• Add unconfirmed transaction pruning when computing closing balance
• Endorse htlc and local reputation
• Fix flaky 0-conf watch-published event
• Publish hold times to the event stream
• Refactor channel params: extract commitment params
• Stricter Bolt11 invoice parsing
• Keep original features byte vector in Bolt12 TLVs
• Ensure htlc_maximum_msat is at least htlc_minimum_msat
• Use Uint64 for max_htlc_value_in_flight_msat consistently

LDK

• Enable Creation of Offers and Refunds Without Blinded Path
• Demacro process forward htlcs
• Clarify persistence order requirements for async persistence
• offer: make the merkle tree signature public
• LSPS5 implementation
• Async background persistence
• Simplify send htlc
• Remove direct calls to handle_monitor_update_completion!
• Introduce RenegotiatedFundingLocked monitor update variant
• Let BackgroundProcessor drive HTLC forwarding
• add expiry_time to PendingOutboundPayment::StaticInvoiceReceived
• Hold times for successful payments
• Use channel’s real funding amounts when processing RGS data
• Introduce ReceiveAuthKey
• Update fee and dust handling for zero fee channels
• Fulfill hold times rustfmt
• Make channel_type required
• Correct non-dust HTLC accounting in next_remote_commit_tx_fee_msat
• Add Shared Input support in interactive TX construction
• Locktimed packages fixes
• Only mark all mon updates complete if there are no blocked updates
• Introduce SendOnlyMessageHandler trait
• Static invoice server
• Use cost / path amt limit as the pathfinding score, not cost
• (Custom Transactions) Add TxBuilder trait, support fixed additional outputs
• Use inbound SCID alias for blinded path creation
• Introduce splice-compatible commitment update monitor variants
• Async recipient-side of static invoice server
• Rustfmt tests that touch persistence
• Fix update_id gap during force_shutdown
• Fix multiplication overflow when logging hold times.
• Introduce RenegotiatedFunding monitor update variant
• Reduce attribution data hold time resolution to 100 ms

lnd

• Increase the default outgoing bandwidth
• Fix arbitrator deadlock found in ResolveContract
• chancloser: fix flakes in chancloser tests
• graph/db: use /*SLICE:<field_name>*/ to optimise various graph queries
• scripts/keys: remove old expired or revoked keys
• Fix ExtraData field and use BigSize encodine
• sqldb+graph/db: prefix graph SQL objects with “graph_”
• routerrpc: accept mutliple outgoing chan ids in queryroutes
• Add missing FundingTimeoutEvent type to SubscribeChannelEvents RPC
• multi: let all V1Store ForEach* methods take a reset call-back
• lnd+itest: plug in graph SQL migration under test tag & add itest
• rpcserver: return consistent grpc NotFound error for GetChaninfo & LookupInvoice
• (graph mig 3): graph/db: migrate zombies, closed SCIDs, prune log from kvdb to SQL
• Enable quiescence in production and add timeout config
• rpcserver: fix race condition in graph cache eviction
• (graph mig 2): graph/db: migrate graph channels and policies from kvdb to SQL
• Fix Shutdown deadlock in some scenarios
• channeldb: gc fwd packgages which have zero ADDs
• (graph mig 1): graph/db: migrate graph nodes from kvdb to SQL
• contractcourt: only close quit in Stop
• fix switch deadlock
• chainntnfs: export NotifierOptions and internal field for interface use
• multi: prevent goroutine leak in brontide
• AuxTrafficShaper methods use first hop pub key
• refactor+graph/db: refactor preparations required for incoming SQL migration code
• discovery: deterministic bootstrapping for local test networks
• graph/db: explicitly store bitfields for channel_update message & channel flags
• graph/db: let FetchChannelEdgesByID behave as promised
• cmd/wtclient: add usage info for session and terminate commands
• routerrpc: reject payment to invoice that don’t have payment secret or blinded paths
• chainreg: use new lseed service
• lnrpc: remove unused type ConfirmationUpdate
• multi: fix deadlock in p2p race condition
• DynComms (2n): lnwire: add authenticated wire messages for Dyn
• (16) graph/db: SQL closed SCIDs table and last few methods
• routing: clean-up & fix blinded path incoming chained channel logic
• routerrpc: add log line for probing the invoice request
• (15) graph/db: SQL prune log
• chainfee: method to round up the fee for a given transaction weight
• (14) graph/db: implement more SQLStore methods
• (13) graph/db: SQL-ize the zombie index
• sqldb: clarify native sql options in lnd.conf
• (12) graph/db: Implement more graph SQLStore methods
• lntest: do not do IO under mutex in fee_service
• itest: test automatic peer bootstrapping
• lntest: enable neutrino testing with bitcoind

BIPs

• BIP352: be explicit for the input_hash corner case
• bip3: Switch to SPDX identifiers
• 380: Disallow H as a hardened indicator
• bip373: add hyperlinks to other BIPs
• BIP-0388: Fix test vector
• BIP3: Address additional review
• (bip-390): add hyperlinks to BIPs (327, 380, 389, 32)

New Releases

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Events and Podcasts

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Mining

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Miscellaneous

• Augur: An Open Source Bitcoin Fee Estimation Library
• Bitcoin Grants Common Application
• 14-year-old BTC worth $9,000,000,000 moved
• Simplicity LOCKED_IN on Liquid Network
• Jack Dorsey releases BitChat decentralized messenger
• Transactions paying less than 1 s/B fees getting confirmed by Luxor
• Stablecoins and the Future of Payments
• U.S. House of Representatives Announces Week of July 14th as “Crypto Week”
• Qubic Just Mined Monero And Redefined What Proof of Work Can Be
• Galaxy Executes One of the Largest Notional Bitcoin Transactions Ever