Announcements

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Presentation

• Async Lightning Payments by Valentine Wallace

Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• Analysis of Replacement Cycling Attacks Risks on L2s (beyond LN)
• Penlock, a paper-computer for secret-splitting BIP39 seed phrases
• Proposed BIP text for Miniscript
• BitVMX: A Virtual CPU to optimistically execute arbitrary programs on Bitcoin
• BIP 322 use case
• Utreexod beta release
• BIP-119.2: Extensions for Lightning Symmetry
• libsecp256k1 v0.5.0 released
• Test cases for signing legacy inputs in transactions

Delving Bitcoin

• Tr(): rawnode() and rawleaf() support
• Silent Payments: Light Client Protocol
• Mutual exclusiveness of op_codes
• Bitcoin Inquisition 27.0
• Upgrading Existing Lightning Channels
• BIP352: PSBT support
• Stable Channels - peer-to-peer dollar balances on Lightning
• Ecash TIDES using Cashu and Stratum v2
• Anonymous usage tokens from curve trees or autct
• Satoshi Style Message Signing
• Pools without covenants
• Deterministic tx selection for censorship resistance

Meetings

• Bitcoin PR Review Club
  • #30000 index TxOrphanage by wtxid, allow entries with same txid
• Bitcoin Core general developer meetings
  • May 2
  • May 9
  • May 16
  • May 23
• Lightning Specification meeting
  • May 6
  • May 20

Optech

• Bitcoin Optech Newsletter #300
  • Bitcoin Optech Newsletter #300 Recap Podcast
• Bitcoin Optech Newsletter #301
  • Bitcoin Optech Newsletter #301 Recap Podcast
• Bitcoin Optech Newsletter #302
  • Bitcoin Optech Newsletter #302 Recap Podcast
• Bitcoin Optech Newsletter #303
  • Bitcoin Optech Newsletter #303 Recap Podcast
• Bitcoin Optech Newsletter #304

Network Data

• 2010 P2Pk coinbases on the move
• BTCcom pool, Binance pool, Poolin, EMCD, Rawpool, and possibly Braiins* have exactly the same template and custom transaction prioritization as AntPoo
• First mainnet multi-hop asset payment w/ Taproot Asset channels
• Proportions of Inscriptions, BRC20, and Runes

CVEs and Research

Research

• Channel Balance Interpolation in the Lightning Network via Machine Learning
• From Slow Propagation to Partition: Analyzing Bitcoin Over Anonymous Routing
• Fully Automated Selfish Mining Analysis in Efficient Proof Systems Blockchains
• Optimizing Virtual Payment Channel Establishment in the Face of On-Path Adversaries
• Payout Races and Congested Channels: A Formal Analysis of Security in the Lightning Network
• PoW Security-Latency under Random Delays and the Effect of Transaction Fees
• Securing Lightning Channels against Rational Miners
• Transaction Fee Estimation in the Bitcoin System

InfoSec

• AlexLab XLink bridge exploited for $4.3m
• Pike Finance drained of $1.9m
• Sonne Finance drained $20m in flash loan attack

Pull Requests and repo updates

Bitcoin Core

• rpc: Optimize serialization and enhance metadata of dumptxoutset output
• system: use %LOCALAPPDATA% as default datadir on windows
• policy: restrict all TRUC (v3) transactions to 10kvB
• net: add ASMap info in getrawaddrman RPC
• Update libsecp256k1 subtree to current master
• net: make the list of known message types a compile time constant
• wallet: Implement independent BDB parser
• Support JSON-RPC 2.0 when requested by client
• p2p: detect addnode cjdns peers in GetAddedNodeInfo()
• kernel: Remove batchpriority from kernel library
• kernel: Remove key module from kernel library
• kernel: De-globalize fReindex
• blockstorage: Separate reindexing from saving new blocks
• serialization: Support for multiple parameters
• p2p: index TxOrphanage by wtxid, allow entries with same txid
• validation: don’t clear cache on periodic flush: >2x block connection speed
• test: adds outbound eviction functional tests, updates comment in ConsiderEviction
• test: Assumeutxo: ensure failure when importing a snapshot twice
• test: Handle functional test disk-full error
• test: Validate UTXO snapshot with coin height > base height & amount > MAX_MONEY supply
• test: Add test case for spending bare multisig
• p2p: gives seednode priority over dnsseed if both are provided
• Simplify network-adjusted time warning logic
• p2p: opportunistically accept 1-parent-1-child packages
• RPC: access RPC arguments by name
• build: Bump clang minimum supported version to 15
• guix: remove bzip2 from deps

BDK

• fix(export): add tr descriptor
• Update bdk_electrum crate to use sync/full-scan structs
• Include the descriptor in keychain::Changeset
• test(wallet): add thread safety test
• Introduce universal sync/full-scan structures for spk-based syncing
• Add new crate bdk-persist

rust-bitcoin

• Add an AddressData type
• Enable getting the witness program from an address
• reduce two-ACK requirement to one-ACK requirement
• Add difficulty adjustment calculation
• Default to forward for tagged hashes
• hashes: Modify trait bounds

libsecp

• tests: call secp256k1_ecmult_multi_var with a non-NULL error callback
• check-abi: explicitly provide public headers
• Add secp256k1_pubkey_sort

secp256k1-zkp

• generator: massively speed up serialization

Core Lightning

• grpc: addpsbtoutput command
• Renepay relax knowledge
• Ignore –ignore-fee-rates on mutual close, don’t massively overpay with LDK nodes
• Function to check if an ID is occupied by any channel inside the DB.
• renepay: test channel capacity unavailable
• common: Fix off-by-one in from_bech32_charset
• bcli: fix compilation on 32-bit platforms.
• Notifications over GRPC
• libplugin: show default option values
• msggen: cluster add methods 3
• offers: fix our blinded path setting in invoices
• cln-plugin: Add dynamic configs and a callback for changes
• Reply to invoice_request even if we need to make explicit connection to node
• hsmd: make get_per_commitment_point unconditionally safe by not returning secret
• Add –bitcoin-rpcclienttimeout CLI parameter
• channeld: Reduce the feerate security margin in high fee environments
• offers: Update to include sciddir_or_pubkey, for introduction point in blinded path.
• BOLT catchup, including dual funding!
• pay: Use the networkheight as current height
• Make Rene Pay Again
• Log and don’t crash on broken anchorspend
• cln_plugin : Support wildcard subscriptions
• Pay listpeerchannels fix

eclair

• Cleanup of RouteBlinding feature
• Fix TransactionsSpec tests
• Implicit node id in offers with blinded paths

LDK

• Ignore partially-pruned channels during routing
• Limit payment path length based on payment_metadata, custom TLVs, etc.
• Log how many nodes/channels we have synced when we try to route
• Provide more color in filter registration methods
• Support intercepting onion messages for offline peers
• Introduce ResponseInstructions for OnionMessage Handling
• Include excess counterparty commitment transaction fees in dust exposure
• Add error handling for channels which fail to be created in funding_transaction_generated_intern
• Sending to Offer without signing_pubkey

lnd

• multi: Inbound fees are retained when not provided
• Adjust ping parameters to improve tor stability
• contractcourt+sweep: fix fee function and deadline issue
• tlv: generate TLV types for custom ranges
• add inbound fees channel updates to notifications
• Add test coverage for integration tests
• invoices: ensure synchronous access to NewTestSqliteDB
• cli: add --amp to SendPaymentRequest in payinvoice
• itest/flake: add more comprehensive assertions before HTLC cleared check
• sweep: make TxPublisher.currentHeight atomic
• invoices: if there are no invoices make gc noop

BIPs

• BIP 352: Silent Payments
• BIP 388: Wallet Policies for Descriptor Wallets
• BIP 387: multi_a() descriptor
• BIP 347: OP_CAT in Tapscript
• Update BIP 340 with fresher info on multi-, threshold, and blind signatures
• (BIP322) remove empty message requirement for full (proof-of-funds) proofs

New Releases

• Bisq 2.0.4
• Bitcoin Inquisition 27.0
• libsecp256k1 v0.5.0
• lnd v0.18.0-beta

Events and Podcasts

• bitcoin++ ATX script edition - livestream 1, livestream 2

Mining

• An integrated landfill-gas-to-energy and Bitcoin mining model
• How to Build a $20 Billion Semiconductor Fab
• Venezuela will disconnect all cryptocurrency mining farms to control electricity demand
• White House Issues An Executive Order For Chinese Miners To Leave Cheyenne

Miscellaneous

• Announcing Harbor
• Announcing the Peer-to-Peer Rights Fund
• Bitcoin’s Precarious Position
• COPA vs Craig Wright ruling
• Cake Wallet implements silent payments
• DSL Taproot Coinbase & Optimised Docker Image
• Emessbee - coinjoin transactions without a coordinator
• FROST Library for Point to Point Networks
• Griefing Bitcoin’s Testnet
• Introducing SNARKnado
• Improving Baselayer Privacy with Dandelion++
• OCEAN innovates: Bitcoin miners offered first ever Lightning Payouts using BOLT12
• OpenSats Grants Long-Term Support for Shashwat Vangani
• Penlock - open-source, cryptographically secure, printable paper-computer
• Silent Payments informational site
• Spiral Grant - Sean Giligan
• Tornado Cash Developer Alexey Pertsev Found Guilty, Sentenced to 64 Months in Prison by Dutch Court
• Two brothers arrested for exploiting MEV relay
• Wasabi Wallet shuts down coinjoin coordinator
• Zeus LN Node - Advanced Usage