Socratic Seminar 133

Announcements

Please join us for our next Socratic Seminar. A special thank you to our sponsors CardCoins, Chaincode Labs and Wolf NYC for food, refreshments and event space.

If you can’t make it to the main event please join us at PUBKEY around 9:30PM. Learn about this awesome new establishment here.

Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

Network Data

Coinbase Prime exploited for uneconomical UTXO consolidation by Magic Eden, context
Lightning Wallets: Self-Custody Despite Poor Network Connection
mempool.space mempool graph updates
BRC mint produces unspendable “royalty” outputs with 420 sats
Wallet of Satoshi crosses 15m transactions
When do Bitcoin Node Operators Upgrade?

CVEs and Research

Research

2PC-MPC: Emulating Two Party ECDSA in Large-Scale MPC
A Better Proof-of-Work Fork Choice Rule
A Holistic Approach for Bitcoin Confirmation Times & Optimal Fee Selection
Bribe & Fork: Cheap Bribing Attacks via Forking Threat
Efficient ECDSA-based Adaptor Signature for Batched Atomic Swaps
Generalized Adaptor Signature Scheme: From Two-Party to N-Party Settings
HARTS: High-Threshold, Adaptively Secure, and Robust Threshold Schnorr Signatures
Mass Exit Attacks on the Lightning Network (revised)
SPRITE: Secure and Private Routing in Payment Channel Networks
Topology Discovery within the Bitcoin Network
Time-Averaged Analysis of Selfish Mining in Bitcoin
Undetectable Selfish Mining

InfoSec

A few notes on AWS Nitro Enclaves: Images and attestation
Bug in btcd pruning code leads to stalling on mainnet
Disclosure: Btcd consensus bugs due to usage of signed transaction version, exploited on testnet
Enhancing trust for SGX enclaves
Exodus Bitcoin Wallet: $490K Swindle
Malicious code in Tornado Cash governance proposal puts user funds at risk

Pull Requests and repo updates

Bitcoin Core

rpc: Do not wait for headers inside loadtxoutset
wallet: cache IsMine scriptPubKeys to improve performance of descriptor wallets
rpc: Fixed signed integer overflow for large feerates
rpc: Drop migratewallet experimental warning
v3 transaction policy for anti-pinning
wallet: Add CoinGrinder coin selection algorithm
RFC: Deprecate libconsensus
net: enable v2transport by default
wallet: batch erase procedures and improve ‘EraseRecords’ performance
v3 followups
wallet: simplify and batch zap wallet txes process
wallet: batch and simplify addressbook migration process
sqlite: Disallow writing from multiple SQLiteBatchs
wallet: remove unused ‘accept_no_keys’ arg from decryption process
Nuke adjusted time from validation (attempt 2)
wallet: Fix migration of blank wallets
wallet: guard against dangling to-be-reverted db transactions
p2p: adaptive connections services flags
crypto: remove use of BUILD_BITCOIN_INTERNAL macro in sha256
During IBD, prune as much as possible until we get close to where we will eventually keep blocks

BDK

tx_builder: Relax generic constraints on TxBuilder
Add map_anchors for TxGraph
feat(esplora): include previous TxOuts for fee calculation
tx_builder: Support setting explicit nSequence for foreign inputs
Implement ElectrumExt for all that implements ElectrumApi
Filter duplicate coins before coin selection

rust-bitcoin

Add NetworkValidationError
taproot: add TapNodeHash getter method on TapTree and NodeInfo
Add API functions p2wpkh_script_code
Improve lock time errors
Add Witness::p2tr_key_spend function

secp256k1-zkp

shallue_van_de_woestijne rewrite

Core Lightning

cln_plugin: switch lifetimes of ConfigOption from static to non-static
tx_parts: use wally to clone tx inputs
core: Defer script extraction until we know it’s needed
libwally: upgrade to latest master, fixes testnet block with huge tx.
Recover plugin to automate recovery in CLN
Fix close fail retry
Renepay fix fees
lightningd: don’t force state if gossipd gives us an unexpected channel_update.
Add no-reconnect-private option to disable automatic reconnect-attempts to peers connected to our node with private channels only
channeld: fix update_fee cap.
Fix gossip code when channels are marked dying
Dual-funding: permit re-negotiation of require-confirmed on RBFs
Splice: Complete tx_abort implementation
wallet: ensure all established channels have aliases.
Anchors not experimental
Expose listoffer and offer over grpc
reckless update: enable install @ commit and add python virtual environments
Add a method to the pyln-client for using the sendcustommsg api
Gossip rework part 3: gossipd now uses gossmap
Fix onchain fees lookup query
Renepay: htlc limits on mcf
cln-plugin: Allow user to set featurebits
hsmtool: add feature to dump private keys
Gossip rework part 2
Compulsory modern features, and open-by-channel-type APIs
hsmd: split revocation from validation
renepay: accomodate fees in the payment flow
New deprecation infrastructure

eclair

Activate dual funding by default
Allow plugins to set a dual funding contribution
More fine grained support for fee diff errors
Skip anchor tx when remote commit has been evicted
Unlock non-wallet inputs
Add require_confirmed_inputs to RBF messages
Unlock utxos on reconnect when signatures haven’t been sent
Relay onion messages to compact node id
Abandon transactions whose ancestors have been double spent
Add configurable threshold on maximum anchor fee
Trampoline to blinded

LDK

Prefer non-Tor nodes when creating blinded paths
Add helper function to properly get invoice pubkey
Preliminary refactoring & structure for dual-funded channels
Add further standard derives to various onion message structs
Route blinding: add min_final_cltv_delta to aggregated CLTV delta
Expose channel_id / counterparty_node_id in BumpTransaction event
Include pending HTLC’s in ChannelDetails
Update full_stack_target to take an arbitrary config object
Ensure successful message propagation in case of disconnection mid-handshake
Expose withheld amount for underpaying HTLCs in PaymentForwarded
public scid utils

lnd

channeldb: refactor UpdateInvoice to make it simpler to create SQL specific implementation
walletrpc: unify coin selection, allow coin selection for PSBT with pre-defined inputs
multi: resend shutdown on reestablish
wtclient: add DeactivateTower and TerminateSession commands
lnwire: add new closing_complete and closing_sig messages
Path Finding Size Estimation including Blinded Path Data
walletrpc: Add Taproot witness types to rpc.
Expose closing tx in waiting_close_channels
Fix Pruned Node Loss Sync Issue.
routerrpc: make use of fee limit obvious in SendPaymentV2
Serialize/deserialize AMP struct in hop
lnwallet: perform mempool acceptance check before publishing
kvdb: embedded postgres upgrade to allow setting a custom max_connections config value

BIPs

Add OP_VAULT (BIP 345)

BOLTs

interactive-tx: Add dual-funding flow, using the interactive tx protocol (feature 28/29)

New Releases

banco - non-interactive atomic swaps on elements, summary
lightning-liquidity, summary
purrfect_vault, summary
zkBitcoin

Mining

Braiins Pool announces Lightning payouts
EIA to temporarily suspend bitcoin miner survey after lawsuit
Marathon Digital Holdings Launches Slipstream, public testing
TIDES Technical Documentation

Miscellaneous

Brink receives $3.6m donation from Coinbase’s GiveCrypto, GiveCrypto winds down
BTC-e server admin indicted for laundering ransom payments, stolen crypto
Cashu-Address: https://app.cashu-address.com/
L402: The Payment Protocol for APIs
Mastering Bitcoin 3rd edition available on GitHub
Opensats provides 0xB10C with Long-Term Support
Opensats fourth wave of grants - splicing, bitcoin core testing suite, braidpool, more
Over Half of Replace-by-Fee-Rate Replacements Are Mined
Police seize 50,000 Bitcoin from former torrent site operator
Sharing the Code Behind Bitkey
Spaces Protocol
Spiral issues grant to @plebhash to work on sv2
Spiral renews grant to Christoph Ono
Swaproot: cheaper and more private on-chain deposits on Phoenix
The Bitcoin Halving will be reorged
The Past, Present, and Future of Offline Payments [in Lightning]