Socratic Seminar 18

2026-02-19T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Presidio Bitcoin!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers January 15th, 2026 to February 18th, 2026.</li> </ul>
News</h2>

Amboss Unveils RailsX: The First Lightning-Native DEX for P2P Bitcoin and Stablecoin Trading</a></li>
SDM Completes $1 Million Lightning Transaction in Pilot to Kraken, Powered by Voltage</a></li>
Lightning Labs Releases AI Agent Tools for Native Bitcoin Lightning Payments</a></li>
Magma Liquidity Market Volume on Track to Double Month-over-Month</a></li>
Amboss Rails Cluster Providing Over $1M/Month in Liquidity to Lightning Network</a></li>
Bitcoin's Lightning Network Exceeds $1 Billion in Monthly Volume</a></li>
Voltage Launches Voltage Credit: Programmatic Revolving Line of Credit on Bitcoin Payment Rails</a></li>
Lightning's Noise Protocol: An Approachable Deep Dive</a></li> </ul>
Releases</h2>

Core Lightning v25.12.1</a></li>
LND v0.20.1-beta</a></li>
LDK v0.1.9</a></li>
LDK v0.2.1</a></li>
LDK v0.2.2</a></li> </ul>
bLIPs & BOLTs</h2>

Lightning Specification Meeting 2026/02/09</a></li>
Allow either node to send tx_init_rbf in v2 establishment</a></li>
Explicit commit_sig retransmission for interactive-tx</a></li>
BOLT 12: clarify that empty offer_chains must be rejected</a></li> </ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Askrene: scale with many layers</a></li>
No more legacy onion support</a></li>
common: tighten restrictions on periods, as per latest draft</a></li>
askrene: add auto.include_fees layer</a></li>
askrene: fixed a timeout corner case</a></li>
More flake reductions</a></li>
Gossmap: compaction support</a></li>
Askrene parallel solving support</a></li>
bcli: Refactor bcli plugin to synchronous execution</a></li>
Fix peer connect crash</a></li>
Make all peer messages constant message size</a></li>
Gossmap compaction</a></li> </ul>
eclair</a></h3>

Add duration information to payment events</a></li>
Include the node_id of channel peers in payment events</a></li>
Add event for failed payment relay</a></li>
Improve channel and payment events</a></li>
Prioritize private channels when relaying payments</a></li> </ul>
LDK</a></h3>

Introduce Dummy Hop support for Blinded Payment Path</a></li>
Rework ChannelManager::funding_transaction_signed</a></li>
Mixed mode splicing</a></li>
Add custom TLV in Bolt11 Payer API</a></li>
Split splice initiation into two phases</a></li>
Support generic HTLC interception</a></li>
Prevent HTLC double-forwards, prune forwarded onions</a></li>
net-tokio: add fn socks5_connect_outbound</a></li>
Drop ChannelHandshakeLimits::max_funding_satoshis</a></li>
Free holding cells immediately rather than in message sending</a></li>
Add support for "phantom" BOLT 12 offers, up to the invoice_request step</a></li>
Rework ChannelManager::funding_transaction_signed</a></li>
Support HTLC interception by source channel</a></li>
Set dont_forward on private channel updates and add tests</a></li>
Fix race condition in async UtxoFuture resolution</a></li>
BOLT 12: Validate bech32 padding per BIP-173</a></li>
Add basic `CLAUDE.md</code> file</a></li>`
`Refactor BroadcasterInterface</code> to include TransactionType</code></a></li>`
`Default to anchors and remove automatic channel acceptance</a></li>`
`Support async signing of interactive-tx initial commitment signatures</a></li>`
`Hold in-flight monitor updates until background event processing</a></li>`
`Switch SplicePrototype</code> feature flag to the prod feature bit</a></li>`
`Drive splices to completion in chanmon_consistency</a></li>`
Free holding cell in remaining quiescence-exit code paths</a></li> </ul> lnd</a></h3> actor: add new package for structured concurrency based on the Actor model</a></li> actor: add new abstraction over mailbox</a></li> multi: update close logic to handle re-orgs of depth n-1, where n is num confs</a></li> graph/db: continue graph store for V2 data</a></li> graph/db: merge g175 types-prep side branch</a></li> switchrpc: improve TrackOnion error handling</a></li> switchrpc: add idempotent external HTLC dispatch via SendOnion</a></li> rpcserver: add wallet_synced to GetInfoResponse</a></li> routerrpc: FailureDetail enums for invoice/AMP validation failures</a></li> build: add cc integration</a></li> build: add PR severity classification workflow</a></li> graphdb: fix backwards-compat for channel edge feature deserialization</a></li> lncli unlock: wait until daemon can unlock</a></li> discovery: fix gossiper shutdown deadlock</a></li> graph/db: add v2 gossip support for channel policies</a></li> .claude+.github: add issue dedupe workflow</a></li> </ul>



Socratic Seminar 17
2026-01-15T00:00:00+00:00
Housekeeping</h2>

Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers December 8th to January 15th.</li>
</ul>
News</h2>

Clarity Act (H.R. 3633)</a></li>
A Mathematical Theory of Payment Channel Networks</a></li>
Lightning Year in Review Stats</a></li>
Stablecoins: Evolution, not a Revolution</a></li>
Distributed Charge Public Testing</a></li>
Time2Build 2025 Winners: Breez Awards Bitcoin Prizes for Lightning Integrations in BTCPay Server, Primal, and More</a></li>
BitGo Adds Support for Lightning Network from Custody</a></li>
Tether Leads $8M Strategic Investment in Speed to Advance Lightning-Native, Stablecoin-Powered Payments</a></li>
LQWD Delivers Record Bitcoin Lightning Network Volumes as Transaction Activity Accelerates</a></li>
REEZ.io Upgrades Bitcoin Payments With Lightning Network Integration</a></li>
Travel Retail Norway starts accepting Bitcoin at Oslo Airport via Lightning Network</a></li>
Bitcoin Capacity on Lightning hits an All Time High — 5,637 BTC!</a></li>
</ul>
Delving Bitcoin</h2>

Ark as a Channel Factory: Compressed Liquidity Management for Improved Payment Feasibility</a></li>
</ul>
Releases</h2>

CLN v25.12.1 Boltz's Seamless Upgrade Experience II</a></li>
ZEUS v0.12.0</a></li>
</ul>
bLIPs & BOLTs</h2>

Lightning Specification Meeting 2026/01/12</a></li>
Lightning Specification Meeting 2025/12/15</a></li>
bolt12: Add test vector for missing offer_amount with offer_currency</a></li>
bolt11: Clarify that n is not mandatory</a></li>
bLIP-51: Specify invalid token error code</a></li>
Update bLIP-51 to add BOLT-12 support</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

doc: Update docs to reflect new hsm secret format</a></li>
Askrene: fix infinite cost assertion</a></li>
Modern node hsm_secret fixes</a></li>
recovery for modern nodes</a></li>
xpay: payment description</a></li>
lightningd: add description field to offer related responces</a></li>
lightningd: fix segfault when parse_filter fails</a></li>
Fix gossipd node announcement ordering</a></li>
Refactor LSPS plugin into proto/core/cln_adapters layers</a></li>
lightningd: fix db constraint error when fixing up old blocks.</a></li>
</ul>
eclair</a></h3>

Rework channel lifecyle events</a></li>
Stop storing channel errors in AuditDb</code></a></li>
Dont rebroadcast announcements for spent channels</a></li>
Add maxCltvExpiryDelta</code> parameter to findRoute*</code> APIs</a></li>
Use fallback feerates on testnets</a></li>
Validate Bolt 11 fallback addresses</a></li>
Improvements and fixes for #3217 </a></li>
fixup! Add API methods to spend funds sent to taproot channel addresses (#3220)</a></li>
Allow remote dust_limit_satoshis</code> up to 5000 sats</a></li>
Dont scan the blockchain for spent external channels</a></li>
Identify failing node</a></li>
Unwatch previous funding tx after splice </a></li>
Accountable HTLCs</a></li>
</ul>
LDK</a></h3>

Parallelize ChannelMonitor</code> loading from async KVStore</code>s</a></li>
Default to padding blinded paths</a></li>
Reconstruct ChannelManager forwarded HTLCs maps from Channels</a></li>
Avoid force-closing 0-conf channels when funding is reorgd</a></li>
Set and relay experimental accountable signal</a></li>
Automatically archive resolved ChannelMonitor</code>s in the BP</a></li>
Fix double-forward, prefer legacy forward maps</a></li>
Remove circular reference in GossipVerifier</code></a></li>
Add a trivial helper to LSPS5s WebhookNotification</code></a></li>
Remove spurious debug assertion added in 0.2</a></li>
Refactor unified_qr.rs to use bitcoin-payment-instructions</a></li>
Insert channel funding outputs into Wallet</a></li>
Parallelize read_payments</code></a></li>
Parallelize init further</a></li>
Add structured logging context fields to LogRecord</a></li>
</ul>
lnd</a></h3>

multi: add BuildOnion, SendOnion, and TrackOnion RPCs</a></li>
htlcswitch: add InitAttempt for idempotent external dispatch</a></li>
lnwire+tlv+route: enforce TLV length validation and add tests</a></li>
Aux Closer: Move coop-close aux finalization to chain watcher</a></li>
estimatefee: tx fee estimate for selected inputs</a></li>
graph: fix inefficient query for IsPublicNode</a></li>
[g175:3] graph/db: continue prepping models</code> for V2 data</a></li>
Enhance Lsp Heuristic when probing a payment</a></li>
multi: add CombinedNonce</code> functionality to Musig2 Signers</a></li>
Always add the payment address when probing an invoice</a></li>
channeldb: fix race condition in link node pruning</a></li>
lnwire: enforce non-zero timestamp in gossip messages</a></li>
discovery: add panic recovery for gossip message processing </a></li>
rpcserver: use protocol max for fundMax, not maxChanSize</a></li>
</ul>


Socratic Seminar 16
2025-11-20T00:00:00+00:00
Housekeeping</h2>

Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers October 16th to November 20th.</li>
</ul>
Privacy Tech That Accepts Lightning</h2>

Obscura VPN</a></li>
Mullvad VPN</a></li>
Kagi Search</a></li>
Maple AI</a></li>
Silent.link</a></li>
</ul>
News</h2>

Square Launches Bitcoin Payment</a></li>
Money Dev Kit Public Beta</a></li>
Lightning++ Happened!</a></li>
Amboss and Voltage Partner to Turn Bitcoin Payments Into a Source of Yield</a></li>
Average Channel Size Spikes</a></li>
Lightning Network Capacity Spikes</a></li>
</ul>
Delving Bitcoin</h2>

Private Key Handover</a></li>
Gossip Observer: New project to monitor the Lightning P2P network</a></li>
</ul>
Releases</h2>

CLN v25.09.1 Hot Wallet Guardian</a></li>
CLN v25.09.2 Hot Wallet Guardian</a></li>
Eclair v0.13.1</a></li>
lnd v0.20.0-beta</a></li>
LDK 0.2 RC2 Natively Asynchronous Splicing</a></li>
</ul>
bLIPs & BOLTs</h2>

Attribution data (feature 36/37)</a></li>
Lightning Specification Meeting 2025/10/20</a></li>
Lightning Specification Meeting 2025/11/17</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Fixing onion message support requirement for the first_node_id of bolt12 invoices</a></li>
xpay phoenix detect</a></li>
askrene: handle maxparts better.</a></li>
Splice Spec Cleanup: Reestablish changes</a></li>
Xpay bad nodes</a></li>
Add Experimental no-MPP, Lsp-Trusts-Client LSPS2 Support</a></li>
keysend: enforce BOLT11 description length limit</a></li>
Add the ability to override an invoice amount to the htlc_accepted hook</a></li>
Deprecate bech32 as default for newaddr</code></a></li>
Enhance wallet backup and recovery with a mnemonic hsm_secret and standard taproot wallet derivations</a></li>
Funding transaction withholding support</a></li>
listnetworkevents: keep a log of all connect/disconnect/failed-connect and pings</a></li>
xpay: wait, if final node gives us an indication we're behind on blockheight.</a></li>
Big nodes, big loads and lots of (overdue) optimizations</a></li>
</ul>
eclair</a></h3>

Allow high remote dust_limit_satoshis</a></li>
Use 73 bytes der-encoded signatures in weight estimation</a></li>
Allow aborting liquidity purchases after signing</a></li>
Eclair v0.13.1 release</a></li>
Remove support for non-anchor channels</a></li>
Stop sending update_fee</code> for mobile wallets</a></li>
Allow aborting liquidity purchases after signing</a></li>
Allow high remote dust_limit_satoshis</code></a></li>
</ul>
LDK</a></h3>

Put a 10_000vByte cap on HolderHTLCOutput</code> 0FC package templates</a></li>
Introduce ReceiveAuthKey verification for Blinded Payment Paths</a></li>
Allow outgoing splice request while disconnected</a></li>
Track funding tx channelmonitor</a></li>
Delay FC for async payments</a></li>
Add support for Testnet4</code></a></li>
Note the mempool policy requirements of zero-fee commitment channels</a></li>
Support async fetching of commitment point during channel reestablish</a></li>
Allow counterparty tx_abort before handling initial commitment signed</a></li>
Always forward gossip for all our channels to all our peers</a></li>
Channel splicing support</a></li>
Support client_trusts_lsp=true on ldk-node</a></li>
Add support for configurable BIP39 mnemonic word counts</a></li>
</ul>
lnd</a></h3>

multi: add upfront-shutdown-address to lnd.conf.</a></li>
[Part 2|*] Implement First Part for SQL Backend functions</a></li>
[Part 3|*] Implement Second Part for SQL Backend functions</a></li>
graph/db: freeze the SQL migration code</a></li>
Don't fail on invalid extra tlv data when decoding a payment</a></li>
lnwire: add missing Gossip 1.75 fields and message</a></li>
Basic structures for onion messages into LND</a></li>
rpcserver: resolve root cause of premature wallet rescanning</a></li>
discovery: fix potential infinite loop bug re context cancel error handling in gossip syncer</a></li>
</ul>


Socratic Seminar 15
2025-09-18T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
Welcome Bitcoin Design Week Attendees</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers August 22nd to September 18th.</li>
</ul>
Presentation</h2>
Steve Lee - Preview of Steve's presentation for lightning++ in Berlin</p>
News</h2>

SoFi Taps Bitcoin Lightning Network for Global Remittances With Lightspark</a></li>
LQWD's Lightning Network Strategy Shows Strong Initial Bitcoin Yield; Results Highlight Potential Yield at Scale on LQWD's BTC Treasury</a></li>
Chipper Cash Now Processes Over 50% of Bitcoin Transactions Through Lightning — Powered by Voltage</a></li>
ZBD’s SDK Powers Bitcoin Earnings in Mobile Games, Driving 124% Revenue Growth</a></li>
RocoMamas adopts Bitcoin Lightning payments at over 100 locations in South Africa</a></li>
Relai sunsets Lightning</a></li>
</ul>
Discussion</h2>

State of Lightning Privacy - Spiral's Elias Rohrer @ bitcoin++ privacy edition</a></li>
MultiChannel and MultiPTLC: Towards A Global High-Availability CP Database For Bitcoin Payments</a></li>
Lightning Is Misunderstood</a></li>
Lightning swaps are</em> the connective tissue</a></li>
</ul>
Released</h2>

Core Lightning v25.09 Hot Wallet Guardian</a></li>
lnd v0.19.3-beta</a></li>
Eclair v0.13.0</a></li>
</ul>
bLIPs & BOLTs</h2>

Lightning Specification Meeting 2025/08/25</a></li>
Lightning Specification Meeting 2025/09/08</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

offers: loosen payment_constraints on invoices' blinded paths.</a></li>
common/bolt11: Fix BOLT11 hash calculation for unknown fallback address versions</a></li>
plugins/bcli: use -rpcwait to simplify waiting for bitcoind to warm up</a></li>
Added fixed SOURCE_DATE_EPOCH flag for reproducible ubuntu builds</a></li>
</ul>
eclair</a></h3>

Adjust batch_size on commit_sig retransmission</a></li>
Split commit nonces from funding nonce in tx_complete</a></li>
Allow omitting previousTx for taproot splices</a></li>
Allow overriding max-closing-feerate with forceclose API</a></li>
Allow non-initiator RBF for dual funding</a></li>
Use balance estimates from past payments in path-finding</a></li>
</ul>
LDK</a></h3>

Improve privacy for Blinded Message Paths using Dummy Hops</a></li>
Update channel_reestablish for splicing</a></li>
Custom Transactions Add TxBuilder::get_next_commitment_stats</a></li>
Async FilesystemStore</a></li>
Add splice-out support</a></li>
Add LSPS5 DOS protections.</a></li>
Validate funding contributions reserves in splice_init and splice_ack handling</a></li>
Integrate Splicing with Quiescence</a></li>
Support splice shared input signing</a></li>
Emit DiscardFunding events for double spent splice transactions</a></li>
Randomize order of inputs from OutputSweeper</a></li>
Commit to client's node id in bLIP-52/LSPS2 promise</a></li>
Create a single P2A anchor on commitment transactions in 0FC channels</a></li>
Always-online node forward invoice request</a></li>
Async send always-online counterparty side</a></li>
Account for splices in claimable balances</a></li>
</ul>
lnd</a></h3>

1/2 discovery+lnwire: add support for DNS host name in NodeAnnouncement msg</a></li>
Rate limit outgoing gossip bandwidth by peer</a></li>
graph/db+sqldb: Make the SQL migration retry-safe/idempotent</a></li>
graph/db: unwrap dns addresses from opaque ones during migration</a></li>
multi: switch on graph SQL migration</a></li>
build: make special label checks auto-pass instead of skip</a></li>
docs: add docs for EstimateRouteFee</a></li>
Add Support for P2TR Fallback Addresses in BOLT-11</a></li>
Expose confirmation count for pending 'channel open' transactions</a></li>
</ul>
Security</h2>


Socratic Seminar 14
2025-08-21T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers July 17th to August 21st.</li>
</ul>
News</h2>

Programming Lightning Workshop: Intro to Payment Channels</a></li>
Force Closures in LND</a></li>
US House Passes Bitcoin, Crypto Market Structure Bill The CLARITY Act</a></li>
Tornado Cash Trial Concludes: Roman Storm Found Guilty on One of Three Counts</a></li>
Samourai Wallet Developers Plead Guilty to Conspiring to Operate an Unlicensed Money Transmitting Business</a></li>
RGB v0.11.1 Launches, Allowing The Creation Of Digital Assets on Bitcoin Mainnet</a></li>
First RGB Bridge Brings USDT From Ethereum to Bitcoin via Lightning</a></li>
Square Begins Rollout of Bitcoin Payments for Sellers, Targets Full Availability by 2026</a></li>
Mullvad Lightning Payments</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Proposal Bitcoin Deposits: A Zero UTXO Trust-Minimized Lightning Wallet</a></li>
RGB yellow paper: the formal specification of Bitcoin & Lightning smart contracts</a></li>
</ul>
bLIPs & BOLTs</h2>

Add bLIP 55: Webhook Registration (LSPS5)</a></li>
Lightning Specification Meeting 2025/07/28</a></li>
Lightning Specification Meeting 2025/08/11</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Askrene single path solver</a></li>
Askrene: prune and cap</a></li>
wss-proxy: replaced by a rust version</a></li>
clnrest: add more request and response types</a></li>
Askrene: fix constraints</a></li>
Reckless uv installer</a></li>
migration from poetry to uv</a></li>
Assume option_channel_type</a></li>
Allow routing by older scids when we splice</a></li>
splice: Implement start_batch</a></li>
cln-bip353: add plugin that fetches payment instructions from human readable addresses</a></li>
Set custom tlvs to update_add_htlc via the htlc_accepted_hook</a></li>
Xpay limit parts</a></li>
xpay BIP353 support</a></li>
</ul>
eclair</a></h3>

Add outgoing reputation</a></li>
Use CLTV expiry when computing reputation</a></li>
Improve taproot channels support and add tests</a></li>
Verify nonces on reconnection after we've pruned funding transactions</a></li>
</ul>
LDK</a></h3>

Update fee and dust handling for zero fee channels</a></li>
Introduce ReceiveAuthKey</a></li>
Hold times for successful payments</a></li>
add expiry_time to PendingOutboundPayment::StaticInvoiceReceived</a></li>
Async background persistence</a></li>
LSPS5 implementation</a></li>
Enable Creation of Offers and Refunds Without Blinded Path</a></li>
lightning-liquidity: Introduce MessageQueueNotifierGuard type</a></li>
Splicing Tx negotiation during splicing</a></li>
Introduce RenegotiatedFundingLocked monitor update variant</a></li>
Let BackgroundProcessor drive HTLC forwarding</a></li>
Ensure partial MPP claims continue to blocks channels on restart</a></li>
Broadcast holder commitment for currently confirmed funding</a></li>
Support splicing in ChannelContext::funding_tx_constructed</a></li>
Detect and fail-back monitor-blocked un-forwarded HTLCs at close</a></li>
Block RAA ChannelMonitorUpdates on PaymentClaimed events</a></li>
Always emit bump events, even when fees are sufficient</a></li>
Consider currently confirmed FundingScope when claiming commitments</a></li>
Introduce FundingTransactionReadyForSignatures event</a></li>
Detect commitment transaction confirmation in ChannelMonitor instead</a></li>
</ul>
lnd</a></h3>

Add deletecanceledinvoice RPC call</a></li>
Increase the default outgoing bandwidth</a></li>
2 graph/db: batch-fetch node data</a></li>
3 graph/db: batch-fetch channel & policy data</a></li>
multi: make gossip filter sends non-blocking, only allow a single backlog catch up goroutine per peer</a></li>
4 sqldb+graph/db: add and use new pagination helper</a></li>
5 sqldb+graph/db: add and use new paginate & batch helper</a></li>
6 graph/db: use batch fetching to improve ForEachNode* performance</a></li>
contractcourt+sweep: make anchor inputs exclusive</a></li>
7 graph/db+autopilot: improve efficiency of autopilot methods that use the ForEachNode/ForEachChannel pattern</a></li>
8 graph/db: use batch loading for various graph SQL methods</a></li>
Add NoopAdd HTLCs</a></li>
graph/db+sqldb: different defaults for SQLite and Postgres query options</a></li>
graph/db: use batch validation to improve SQL migration performance</a></li>
Add missing invoice index for native sql</a></li>
lnd: use persisted node announcement settings across restarts</a></li>
</ul>
Security</h2>

Disclosure: LND gossip_timestamp_filter DoS</a></li>
</ul>


Socratic Seminar 13
2025-06-19T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers May 16th to June 19th.</li>
</ul>
News</h2>

Block’s bitcoin checkout goes live in Vegas, a significant step in making it ‘everyday money’</a></li>
Block to roll out bitcoin payments on Square</a></li>
Square Flies the Flag for the Lightning Network With 9.7% Yield on Bitcoin Holdings</a></li>
LNBig routing income data</a></li>
Block Announces Bitcoin Business Stack, Makes Historic Lightning Payments Push at Bitcoin 2025</a></li>
Amboss Launches Rails, a Self-Custodial Bitcoin Yield Service</a></li>
Steak ‘n Shake Now Accepting Bitcoin via Lightning Network Across U.S. Locations</a></li>
Steak ‘n Shake Reveals Bitcoin Payment Success at Bitcoin 2025 Conference</a></li>
1.5 Million Users to Access Bitcoin’s Lightning Network on Xverse thanks to Sati</a></li>
Ark Labs Launches Arkade, a New Native Operating System Using Bitcoin</a></li>
Spark Partners with Breez to Launch Bitcoin-Native SDK for Lightning Payments</a></li>
Magic Eden Partners with Spark to Bring Fast, Cheap Bitcoin Settlements</a></li>
Save Our Wallets Launch</a></li>
BRCA Included in market structure bill, the Clarity Act</a></li>
Bitcoin Development Fund 5 year Report</a></li>
Lightning Wallet Market Share in Japan</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Latency and Privacy in Lightning</a></li>
Research Update: A Geometric Approach for Optimal Channel Rebalancing</a></li>
</ul>
Bitcoin Optech Podcast</a></h4>

N/A</li>
</ul>
Miscellaneous</h4>

N/A</li>
</ul>
Releases</h2>

LND v0.19.0-beta</a></li>
LND v0.19.1-beta</a></li>
LDK v0.1.4 - May 23, 2025 - "Careful Validation of Bogus States"</a></li>
</ul>
bLIPs & BOLTs</h2>

Clarify Mandatory Field Length Requirements and Add Note on Low R Signatures in BOLT 11</a></li>
Path queries (feature 66/67)</a></li>
Add recommendations for receiver-side random delays</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Peer storage enable</a></li>
gossipd: check for existing channel announcement before sigcheck</a></li>
</ul>
eclair</a></h3>

Attributable failures</a></li>
Refactor some closing helper functions</a></li>
Add low-level taproot helpers</a></li>
Stricter batching of commit_sig messages on the wire</a></li>
Cleaner handling of HTLC settlement during force-close</a></li>
Watch spent outputs before watching for confirmation</a></li>
Rework closing channel balance computation</a></li>
Parse offers and pay offers with currency</a></li>
Add attribution data to UpdateFulfillHtlc</a></li>
Remove non-final transactions from XxxCommitPublished</a></li>
</ul>
LDK</a></h3>

Pass supported_protocols to LSPS0 (fix ListProtocols support)</a></li>
Read ChannelManager even if we have no-peer post-update actions</a></li>
Introduce interactive signing state flags for funded states.</a></li>
Do not dip into the funder's reserve to cover the two anchors</a></li>
LSPS2: Fail (or abandon) intercepted HTLCs if LSP channel open fails</a></li>
Introduce Flow utilities and OffersMessageFlow implementation</a></li>
LSPS2: Add error handling events for failed client requests</a></li>
Allow setting a payer_note on pay_for_offer_from_human_readable_name</a></li>
Channel Establishment for V3 Channels</a></li>
Implement start_batch message batching</a></li>
Separate auxiliary HTLC data from holder commitment transaction</a></li>
Peer Storage Feature – Part 2</a></li>
Fix possible dust HTLC sweep tx when feerate remains unchanged during a bump</a></li>
Add missing pending FundingScope checks</a></li>
</ul>
lnd</a></h3>

[graph-work-side-branch]: side branch for graph work</a></li>
lnwire: add lnwire.OpaqueAddr case in WriteElement for channel back-ups</a></li>
feat(lncli): Add --route_hints flag to sendpayment and queryroutes</a></li>
graph/db: init SQLStore caches and batch schedulers</a></li>
sqldb+graph/db: add node related tables and implement some node CRUD</a></li>
sqldb: re-usable TxOptions and NoOpReset</a></li>
sqldb+graph/db: add channel tables and implement some channel CRUD</a></li>
protofsm: add ConfMapper to allow conf attribute projection for new events</a></li>
protofsm: add option to allow conf resp to return full block</a></li>
accessman: remove restrictions on protected/temporary peers</a></li>
Add the option on path creator to specify the incoming channel on blinded path</a></li>
lnrpc: add HtlcIndex to ForwardingEvents</a></li>
multi: explicitly define InboundFees in ChannelUpdate and ChannelEdgePolicy</a></li>
graph/db: only fetch required info for graph cache population</a></li>
lnrpc: add incoming/outgoing channel ids filter to forwarding history request</a></li>
</ul>
Security</h2>

Full-Disclosure: CVE-2025-27586 "No Santa Claus under the Lightning Sun"</a></li>
</ul>


Socratic Seminar 12
2025-05-15T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers April 25th to May 15th.</li>
</ul>
Demos</h2>

D++ Mario Kart: Double Sats game</a></li>
D++ Lightning voting interface</a> for the Presidio Bitcoin Hackathon</a></li>
</ul>
News</h2>

Revolut Integrates Lightspark for Lightning-Fast Bitcoin Payments in the UK and Europe</a></li>
Coinbase: 15% of BTC transactions now move on Lightning rails</a></li>
Amboss Liquidity Subscriptions</a></li>
Geyserfund: Lightning is now 75% of contributions volume</a></li>
Paying for Groceries with Bitcoin: SPAR, DFX, LNbits</a></li>
57% of ticket sales for Adopting Bitcoin on Lightning</a></li>
37% of Bitcoin transactions at CoinCorner on Lightning</a></li>
Exploring Taproot Assets in Ark</a></li>
BitGo Integrates Bitcoin Lightning Network</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Mitigating Channel Depletion in the Lightning Network: A Survey of Potential Solutions</a></li>
Path Queries: Addressing Payment Reliability and Routing limitations</a></li>
</ul>
Bitcoin Optech Podcast</a></h4>

N/A</li>
</ul>
Miscellaneous</h4>

Murch's Take On OP_RETURN vs. Knots</a></li>
Sovereign Tools: A comprehensive Bitcoin and Lightning Network wallet comparison tool</a></li>
Misty Breez: A hybrid Lightning and Liquid network wallet built with the Nodeless Breez SDK</a></li>
Ultimate guide to LN routing and fee management.</a></li>
Taproot Assets Extension for lnbits</a></li>
</ul>
Releases</h2>

Core Lightning v25.02.2</a></li>
LND v0.19.0-beta.rc4</a></li>
LNDg v1.10.0</a></li>
Zeus v0.11.0-alpha4</a></li>
Phoenix v2.6.0</a></li>
</ul>
bLIPs & BOLTs</h2>

Require minimally-encoded features in BOLT 11 invoices</a></li>
Lightning Specification Meeting 2025/05/05</a></li>
BIP 321: URI Scheme (Replace BIP 21 with a new BIP containing information about more modern usage of it)</a></li>
Does option_simple_close depend on CPFP carve out ?</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Add LSPS0 Client and Service Plugin</a></li>
Handle closed channels better</a></li>
lightningd: add short_channel_id option to listpeerchannels.</a></li>
Splice: Interop Final (probably) with Eclair</a></li>
bcli: don't try asking non-full nodes for blocks.</a></li>
Workaround for LND to cause a force-close on our channel</a></li>
Sendonion: add total amount</a></li>
Signmessage</a></li>
</ul>
eclair</a></h3>

Simplify channel keys management</a></li>
Rework the TransactionWithInputInfo architecture</a></li>
Increase default revocation timeout</a></li>
</ul>
LDK</a></h3>

(2/3) Add Enum for HTLCHandlingFailed Reasons</a></li>
(3/3) Add Failure Reason to HTLCHandlingFailed</a></li>
Expand PaymentClaimable to include all inbound channel IDs for a payment</a></li>
Log which hop in a path was the most limiting in capacity</a></li>
Do not fail to load ChannelManager when we see claiming payments</a></li>
Sweeper async change destination source fetching</a></li>
Disallow dual-sync-async persistence without restarting</a></li>
</ul>
lnd</a></h3>

sweep: return all inputs in PendingSweeps</a></li>
multi: downgrade to legacy coop close for taproot channels</a></li>
chain: add testnet4 support</a></li>
bimodal pathfinding probability improvements</a></li>
</ul>
Security</h2>

N/A</li>
</ul>


Socratic Seminar 11
2025-04-24T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers March 14th to April 24th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Announcing Versioned Storage Service (VSS)</a></li>
Phoenix is back in the USA</a></li>
Asset Loop</a></li>
Greenlight Empowers Non-Custodial Lightning Integration Using VLS</a></li>
Cashu is coming to ZEUS</a></li>
Bitcoin Core v29.0 released, including Ephemeral Dust</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Fee-Based Spam Prevention For Lightning</a></li>
</ul>
Bitcoin Optech Podcast</a></h4>
Miscellaneous</h4>

Lightning liquidity management agent</a></li>
ngx_l402: An Nginx module that enables pay-per-request authentication using the L402 protocol</a></li>
LNVPS: A bitcoin powered VPS provider</a></li>
</ul>
Releases</h2>

CLN v24.11.2 The lightning-dev Mailing List III</a></li>
CLN v25.02.1 - Onion Packet Filler Accreditation II</a></li>
Eclair v0.12.0</a></li>
LDK v0.1.2 - Apr 02, 2025 - "Foolishly Edgy Cases"</a></li>
LNBits v1.0.0 - Alan Bits</a></li>
Phoenixd v0.5.1</a></li>
</ul>
bLIPs & BOLTs</h2>

Check for preimage before failing back missing HTLCs</a></li>
Make payment_secret mandatory and ASSUMED</a></li>
Lightning Specification Meeting 2025/03/24</a></li>
Lightning Specification Meeting 2025/04/07</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

lightningd: fix anchorspend HTLC deadline logic</a></li>
Fix missing p2wpkh for mutual close with old peers</a></li>
opening: Do not forget zeroconf channels due to funding timeout</a></li>
Fix blinded path peer selection</a></li>
</ul>
eclair</a></h3>

Add path finding for blinded routes</a></li>
Add support for using last_funding_locked tlv in channel_reestablish</a></li>
Offers without extra plugin</a></li>
Improve Bolt12 offer APIs</a></li>
Remove amount-based confirmation scaling</a></li>
Support p2tr bitcoin wallet</a></li>
Relay non-blinded failure from wallet nodes</a></li>
Use package relay for anchor force-close</a></li>
Optional payment_secret in trampoline outer payload</a></li>
</ul>
LDK</a></h3>

Correct and update confirmation target constant definitions</a></li>
Support scalar tweak to rotate holder funding key during splicing</a></li>
allow functional tests to be used externally with a dynamic signer factory</a></li>
Log cases where an onion failure cannot be attributed or interpreted</a></li>
Add BOLT12 support to bLIP-51 / LSPS1</a></li>
lightning-invoice: explicitly enforce a 7089 B max length on BOLT11 invoice deser</a></li>
Handle receiving payments via Trampoline</a></li>
Attributable failures</a></li>
Fix long route failure attribution</a></li>
[RFC] Implement a way to do BOLT 12 Proof of Payment</a></li>
</ul>
lnd</a></h3>

macaroons: ip range constraint</a></li>
multi+server.go: add initial permissions for some peers</a></li>
multi: integrate new RBF co-op flow into the server+peer</a></li>
chain: add testnet4 support</a></li>
multi: downgrade to legacy coop close for taproot channels</a></li>
</ul>
Security</h2>


Socratic Seminar 10
2025-03-13T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Spiral</a>!</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers January 29th to March 13th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
Fun & Punchy Intro</h2>

Super Mario Sats game demo by D++</a></li>
Satoshi's 50th birthday party at Presidio Bitcoin 6:00 pm on April 5th</li>
</ul>
News</h2>

USDT Is Coming to Bitcoin and Lightning</a></li>
Pathfinding With LDK</a></li>
Custodial Solutions Are Not Solutions</a></li>
How MuSig2 Is Powering Lightning Liquidity with Loop</a></li>
PSA: You can now recover sats you might have lost in channels with LNBIG in 2018-2021</a></li>
Fedimint Lightning Gateway uses LDK Node to simplify deployment and liquidity management</a></li>
How we built our Sparknodes using LDK</a></li>
Bitcoin Payments: From Digital Gold to Everyday Currency</a></li>
What’s Driving Bitcoin Adoption in 2025?</a></li>
LND's Deadline-Aware Budget Sweeper</a></li>
</ul>
Presentation</h2>

Vikash Singh on machine learning + Lightning</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Which Ephemeral Anchor Script Should Lightning Use?</a></li>
Zk-Gossip for Lightning Channel Announcements</a></li>
Zero-fee commitments for mobile wallets</a></li>
Highly Available Lightning Channels Revisited – ROUTE OR OUT</a></li>
Hybrid Jamming Mitigation: Results and Updates</a></li>
An Exposition of Pathfinding Strategies Within Lightning Network Clients</a></li>
</ul>
Bitcoin Optech Podcast</a></h4>

N/A</li>
</ul>
Miscellaneous</h4>

N/A</li>
</ul>
Releases</h2>

Core Lightning v25.02</a></li>
LDK v0.1.1</a></li>
LND v0.18.5-beta</a></li>
Phoenix v2.5.0</a></li>
VLS v0.13</a></li>
</ul>
bLIPs & BOLTs</h2>

Option Simple Close</a></li>
Peer storage protocol spec merged</a></li>
Attributable failures (feature 36/37)</a></li>
Zero-fee commitments using v3 transactions (feature 40/41)</a></li>
Lightning Specification Meeting 2025/02/10</a></li>
Lightning Specification Meeting 2025/02/24</a></li>
Lightning Specification Meeting 2025/03/10</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

renepay: Support for BOLT12</a></li>
Add support for BIP353 human readable names & more</a></li>
xpay: don't MPP if we're told not to</a></li>
</ul>
eclair</a></h3>

Only Sync With Top Peers</a></li>
Send channel_announcement for splice transactions on public channels</a></li>
Add router support for batched splices</a></li>
Add liquidity griefing protection for liquidity ads</a></li>
Allow recipient to pay for blinded route fees</a></li>
Add scripts for taproot channels</a></li>
</ul>
LDK</a></h3>

Fail Htlc Backwards Before Upstream Claims On-Chain</a></li>
Implement Quiescence Protocol</a></li>
Support receiving async payments</a></li>
PeerStorage: Add feature and store peer storage in ChannelManager</a></li>
Merge probabilistic scores from external source</a></li>
Introduce RouteParametersConfig</a></li>
</ul>
lnd</a></h3>

lnrpc+docs: deprecate warning SendToRoute, SendToRouteSync, SendPayment, and SendPaymentSync in Release 0.19</a></li>
Make BumpFee RPC user inputs more stricter</a></li>
Allow coop closing a channel with HTLCs on it via lncli</a></li>
</ul>
Security</h2>

LND: Excessive Failback Exploit</a></li>
</ul>


Socratic Seminar 9
2025-01-30T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a>, Hivemind Ventures</a>, and Spiral</a> (our newest sponsor!).</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers Dec 12th to January 28th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Ross is free!</a></li>
Bitcorn Lightning chat room</a></li>
Solo block</a> found during the 256 Foundation</a> Telehash using Apollo II</a> node</li>
Amboss announces Magma AI</a></li>
Alby Labs releases ZapPlanner</a></li>
Closure of "DH Node" routing node by Diamond Hands</a></li>
Boltz launches Boltz Pro</a></li>
Tether will return to bitcoin via Taproot Assets</a></li>
Rizful: a service offering instant disposable Lightning nodes</a></li>
LQWD Liquidity Provider</a></li>
Self-Custodial LN in 2025</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Disclosure: irrevocable fees -- stealing from LN using revoked commitment transactions</a></li>
BROKEN: Multi-Party Eltoo with bounded settlement</a></li>
Contract-level Relative Timelocks or, let’s talk about ancestry proofs and singletons</a></li>
</ul>
Bitcoin Optech Podcast</a></h4>

Channel Depletion Research Deep Dive Podcast</a></li>
</ul>
Miscellaneous</h4>

A fast, scalable protocol for resolving Lightning payments</a></li>
Lightstack: Automagic Selfcustodial Cloud Lightning Stack</a></li>
</ul>
Releases</h2>

Core Lightning v24.11.1</a></li>
LDK v0.1</a></li>
LND v0.18.4-beta</a></li>
</ul>
bLIPs & BOLTs</h2>

Add bLIP 50: LSP Spec Transport Layer (LSPS0)</a></li>
Add bLIP 51: Channel Requests (LSPS1)</a></li>
Add bLIP 52: JIT Channel Negotiation (LSPS2)</a></li>
Include BIP 353 name info in invoice_requests</a></li>
Project Updates: Hybrid Channel Jamming Mitigation</a></li>
LN Spec Meeting 12/16</a></li>
LN Spec Meeting 01/13</a></li>
Remove explicit 6-blocks delay for announcement_signatures</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

N/A</li>
</ul>
eclair</a></h3>

Peer storage</a></li>
Delay considering a channel closed when seeing an on-chain spend</a></li>
Increase min-depth for funding transactions</a></li>
Implement option_simple_close</a></li>
Get ready for storing partial commit signatures</a></li>
Send channel_announcement for splice transactions on public channels</a></li>
</ul>
LDK</a></h3>

Support Trampoline flag in BOLT12 invoices</a></li>
Tweak historical scoring model PDF and default penalties</a></li>
Add lightning-liquidity crate to the workspace</a></li>
Authenticate blinded payment paths</a></li>
Set holder_commitment_point to Available on upgrade</a></li>
Batch on-chain claims more aggressively per channel</a></li>
Add static invoice creation utils to ChannelManager</a></li>
</ul>
lnd</a></h3>

Add Silent Payment send support</a></li>
Onion messaging + bolt 12 offers</a></li>
</ul>
Security</h2>

Morehouse on LDK: Invalid Claims Liquidity Griefing</a></li>
Morehouse on LDK: Duplicate HTLC Force Close Griefing</a></li>
</ul>


Socratic Seminar 8
2024-10-17T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a> and Hivemind Ventures</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers August 23rd to October 14th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Strike adds BOLT12 support</a></li>
10101 is shutting down</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Hybrid jamming mitigation: results and updates</a></li>
SuperScalar: laddered timeout-tree structured Decker-Wattenhofer factories</a></li>
Privately sending payments while offline with BOLT12</a></li>
Lightning cheques</a></li>
Expanding on BOLT12</a></li>
</ul>
Miscellaneous</h4>

LDK + BOLT12 + Rust demo of stable channels</a></li>
Multi-party submarine swaps</a></li>
Ark 0.3.0</a></li>
</ul>
Releases</h2>

Core Lightning 24.08</a> & Core Lightning 24.08.1</a></li>
LDK 0.0.124</a></li>
LND 0.18.3beta</a> (Release notes</a>)</li>
Phoenix mobile 2.4.0 & phoenixd 0.4.0</a>

Increased BOLT12 invoice expiry to 24 hours</li>
</ul>
</li>
Zeus 0.9.0</a></li>
</ul>
bLIPs & BOLTs</h2>

BOLT12 spec merged: ready for tattoos</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

hsmtool: provide nodeid from hsm secret</a></li>
pay: Remember and update channel_hints across payments</a></li>
Add getemergencyrecoverdata RPC Command to Fetch Data from emergency.recover File</a></li>
</ul>
eclair</a></h3>

Implement on-the-fly funding based on splicing and liquidity ads</a>

bLIP 36: on-the-fly channel funding</a></li>
</ul>
</li>
Add support for funding_fee_credit</code></a>

bLIP 41: Channel funding fee credit</a></li>
</ul>
</li>
Wake up wallet nodes before relaying messages or payments</a></li>
Extensible liquidity ads</a></li>
Add recommended_feerates</code> optional message</a></li>
</ul>
LDK</a></h3>

Add the core functionality required to resolve Human Readable Names</a>

bLIP 32: Onion Message DNS Resolution</a></li>
</ul>
</li>
Support paying static invoices</a> per BOLTs #1149</a></li>
Split up ConfirmationTarget</code> even more</a></li>
Introduce Reply Paths for BOLT12 Invoice in Offers Flow</a></li>
Introduce Retry InvoiceRequest Flow</a></li>
</ul>
lnd</a></h3>

[1/7] lnwire: add new Gossip 1.75 messages</a>

Optech explainer: Updated channel announcements</a></li>
</ul>
</li>
[custom channels 5/5]: merge custom channel staging branch into master</a></li>
discovery: implement banning for invalid channel anns</a></li>
</ul>


Socratic Seminar 7
2024-08-22T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a> and Hivemind Ventures</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers July 17th to August 22nd.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Taproot Assets on Lightning: The Global Financial Interoperability Layer</a></li>
Bisq2 adds Lightning support</a></li>
Mutiny Wallet is shutting down</a></li>
Super Testnet compares Monero and Lightning privacy</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Bolt 12 Trusted Contacts</a></li>
</ul>
Releases</h2>

Core Lightning v24.08rc2</a></li>
lnd v0.18.3</a></li>
VLS 0.12</a></li>
Ark v0.2</a></li>
</ul>
bLIPs</h2>

bLIP 4: Experimental Endorsement Signaling</a></li>
bLIP 25: Allow forwarding HTLCs with less value than the onion claims to pay</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Part 5: experimental range</a></li>
Part 6: final catchup to latest BOLT spec</a></li>
</ul>
eclair</a></h3>

Add HTLC endorsement/confidence </a></li>
</ul>
LDK</a></h3>

Authenticate use of offer blinded paths</a></li>
</ul>
lnd</a></h3>

MICRO: lnwallet: refactor channel to use new typed List #8952</a></li>
(2/4) Route Blinding Receives: Receive and send to a single blinded path in an invoice.</a></li>
routing: inbound fees support for BuildRoute</a></li>
</ul>


Socratic Seminar 6
2024-07-15T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a> and Hivemind Ventures</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers April 13th to May 11th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Phoenix Android/iOS/Server now supports BOLT12</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

bLIP: BOLT 11 Invoice Blinded Path Tagged Field</a></li>
Estimating Likelihood for Lightning Payments to be (in)feasible</a></li>
</ul>
Miscellaneous</h2>

Matt Morehouse on Fuzz Testing the Lightning Network</a></li>
</ul>
Releases</h2>

lnd v0.18.2-beta</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

 Part 2: connectd onionmessage improvements</a></li>
</ul>
eclair</a></h3>

Monitor onion messages</a></li>
Reject unspendable inputs in interactive-tx</a></li>
Activate route blinding and quiescence features</a></li>
</ul>
LDK</a></h3>

Introduce MessageContext and use it to allow abandon failed payments</a></li>
Interactive TX negotiation tracks shared outputs</a></li>
Set max path length when paying BOLT 12 invoices.</a></li>
Blinded paths with unannounced introduction nodes</a></li>
</ul>
lnd</a></h3>

1/4 Route Blinding Receives: Groundwork</a></li>
routing: cancelable payment loop</a></li>
multi: hook up breach arb with new aux sweeper sub-system</a></li>
</ul>


Socratic Seminar 5
2024-06-17T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a> and Hivemind Ventures</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers April 13th to May 11th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Introducing Ark Labs</a></li>
</ul>
Discussion</h2>
Delving Bitcoin</a></h4>

Stable Channels - peer-to-peer dollar balances on Lightning</a></li>
Upgrading Existing Lightning Channels</a></li>
</ul>
Miscellaneous</h2>

Christian Decker - SIGHASH_NOINPUT: A History</a></li>
Securing Lightning Channels against Rational Miners</a></li>
OCEAN now supports BOLT12 payouts</a>

Documentation</a></li>
</ul>
</li>
Ark v2</a></li>
Channel Balance Interpolation in the Lightning Network via Machine Learning</a></li>
</ul>
Releases</h2>

LND v0.18.0-beta</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

offers: Update to include sciddir_or_pubkey, for introduction point in blinded path.</a></li>
BOLT catchup, including dual funding!</a></li>
Ignore --ignore-fee-rates on mutual close, don't massively overpay with LDK nodes</a></li>
</ul>
eclair</a></h3>

Unwrap blinded routes that start at our node</a></li>
Add payCommitTxFees flag to LocalParams</a></li>
Add EncodedNodeId for mobile wallets</a></li>
Accept onion failure without a channel_update</a></li>
Use resolved paths in BlindedHop</a></li>
</ul>
LDK</a></h3>

Trampoline Onion Deserialization</a></li>
Allow responding asynchronously to OnionMessage</a></li>
BOLT 12 static invoice encoding and building</a></li>
Parse v2 gossip</a></li>
Compact blinded path creation</a>

Optional compact blinded path creation</a></li>
</ul>
</li>
Allow for user-specified error message during force close channel</a></li>
Asynchronous Bolt12Invoice payment</a></li>
Force-close channels if their feerate gets stale without any update </a></li>
</ul>
lnd</a></h3>

Add more RPCs for scid aliases</a></li>
routing: cancelable payment loop</a></li>
rpc+htlcswitch: add HTLC transformation capabilities to the interceptor</a></li>
3/5: multi: add new AuxFundingController for custom external funding flows</a></li>
</ul>
fedimint</a></h3>

split: Support split partial invoice payments</a></li>
</ul>
BIPs/BOLTS/BLIPs</h3>

BIP431: Opt In Topologically Restricted Until Confirmation Transactions For More Robust Fee-bumping</a></li>
Define blip-0032, DNSSEC proof querying over onion messages</a></li>
</ul>


Socratic Seminar 4
2024-05-14T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a>, Hivemind Ventures</a>, and CardCoins</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers April 13th to May 11th.</li>
</ul>
Presentation</h2>

Ken Sedgwick</a> - VLS</a> demo [presentation]</a></li>
Valentine Wallace</a> - Async Payments</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

ACINQ announces that Phoenix will be removed from US app stores on May 3rd</a></li>
Strike is exploring BOLT12 and LDK</a></li>
Samourai wallet founders arrested</a></li>
Wasabi blocks US citizens and will shut down coordination services</a></li>
</ul>
Discussion</h2>
Tweets & Blogs</h4>

Roasbeef makes a mainnet asset keysend payment w/ Taproot Asset channels</a></li>
1 week later, Roasbeef makes a mainnet multi-hop asset payment w/ Taproot Asset channels</a></li>
Lopp: Griefing Bitcoin's Testnet</a></li>
</ul>
Delving Bitcoin</a></h4>
N/A</p>
Miscellaneous</h2>

Two WIP Ark implementations are now public</a></li>
clArk is covenant-less and relies on pre-signed tx</a></li>
ark relies on covenants and is currently using Liquid</a></li>
Ark vs clArk explainer</a></li>
</ul>
Releases</h2>

LDK v0.0.123</a></li>
LND v0.17.5-beta</a></li>
LND v0.18.0-beta Release Candidates</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Fetch block from a peer if we don't have it</a></li>
</ul>
eclair</a></h3>

Implicit node id in offers with blinded paths</a></li>
Update Bitcoin Core to v26.1</a></li>
</ul>
LDK</a></h3>

ChannelManager documentation refresh</a></li>
Add fuzzing coverage for BOLT11 invoice deserialization</a></li>
Include excess counterparty commitment transaction fees in dust exposure</a></li>
LDK #3017</a> and #3018</a> update BOLT12 structs to support last-minute changes to the spec</li>
</ul>
lnd</a></h3>

LND #8147</a>, #8422</a>, #8423</a>, #8148</a>, #8667</a>, and #8674</a> replace LND’s old sweeper with a new implementation</li>
lnrpc: rejects positive inbound fees by default</a></li>
Blinded Route Error Handling</a></li>
</ul>


Socratic Seminar 3
2024-04-16T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a>, Hivemind Ventures</a>, and CardCoins</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers January 13th to April 12th.</li>
</ul>
Presentation</h2>

Steve Lee</a> - BOLT12 makes Bitcoin digital cash</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Coinbase selects Lightspark for Lightning</a></li>
Braiins releases beta Lightning payouts</a></li>
ACINQ releases phoenixd</a></li>
</ul>
Delving Bitcoin</h2>

sighash_outputdeltabounds</code></a></li>
Payjoin-in-Potentiam: Externally fund an LSP channel open with one transaction</a></li>
Ecash and lightning via ZKCP</a></li>
Liquidity provider utxo management</a></li>
DSL for experimenting with contracts</a></li>
</ul>
Miscellaneous</h2>

Human-readable names via DNS</a></li>
Hedgehog: a protocol for improved layer two bitcoin payments</a></li>
btcd block stalling bug</a></li>
Block-stalling issue in Core prior to v22.0</a></li>
</ul>
Releases</h2>

Core Lightning v24.02</a></li>
Eclair v0.10.0</a></li>
LDK v0.0.120</a></li>
LND v0.17.4-beta</a></li>
VLS v0.11.0</a></li>
Fedimint Lightning Gateway v0.3.0</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Anchor-style channels become the default on Bitcoin</a></li>
Removal of EOL deprecations for 23.05</a></li>
</ul>
eclair</a></h3>

Add configurable threshold on maximum anchor fee</a></li>
Abandon transactions whose ancestors have been double spent</a></li>
Allow plugins to set a dual funding contribution</a></li>
</ul>
LDK</a></h3>

Interactive transaction construction</a></li>
Include pending HTLC's in ChannelDetails</a></li>
Serialize Trampoline payloads in outbound onions</a></li>
Preliminary refactoring & structure for dual-funded channels</a></li>
Route blinding: add min_final_cltv_delta to aggregated CLTV delta</a></li>
Adds Into for PaymentPreimage</a></li>
Support keysend to blinded paths</a></li>
</ul>
lnd</a></h3>

Support utilizing Environment Variables in lnd.conf for rpcuser and rpcpass fields</a></li>
lnwire: add new closing_complete and closing_sig messages</a></li>
Unify coin selection, allow coin selection for PSBT with pre-defined inputs</a></li>
chainfee: introduce filterManager and use it for fee floor</a></li>
Upgrade new taproot TLVs to use tlv.OptionalRecordT</a></li>
</ul>


Socratic Seminar 2
2024-01-16T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a>, Hivemind Ventures</a>, and CardCoins</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers November 4th to January 12th.</li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

Wallet of Satoshi stops serving US users</a></li>
</ul>
Mailing list & Delving Bitcoin</h2>

LN-Symmetry project recap</a></li>
Liquidity griefing in multi-party transaction protocols</a></li>
LN OM-mixer services</a></li>
LNHANCE BIPs and implementation</a></li>
Liquidity Ads and griefing subtleties</a></li>
The remote anchor of anchor channels is redundant</a></li>
Scaling Lightning Safely With Feerate-Dependent Timelocks</a></li>
</ul>
Miscellaneous</h2>

December 2023</a> & January 2024 Lightning spec meeting notes</a></li>
Optech overview of LN anchors and v3 transaction relay proposal</a></li>
Rethinking Lightning</a></li>
Lightning, validia chain, and validity rollup comparison</a></li>
Mercury Layer adds blinding</a></li>
</ul>
Releases</h2>

Core Lightning v23.11</a></li>
LDK v0.0.119</a></li>
LDK Node v0.2.0</a></li>
LND v0.17.3-beta.rc1</a></li>
Fedimint v0.2.0 released</a> including private lightning payments</a></li>
Mutiny-node v0.5.0</a> adds multi-LSP support and fedimint</li>
Phoenix v2.1.0 adds inbound liquidity requests</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Implement is_some</code> for cln_rpc::options::Value</code></a></li>
coin_mvt: use the lightning_hrp</code> for all</em> coin movement currency</a></li>
</ul>
eclair</a></h3>

Dip into remote initiator reserve only for splices</a></li>
Add a txOut field to our InteractiveTxBuilder.Input interface</a></li>
</ul>
LDK</a></h3>

Direct connect for OnionMessage sending</a></li>
Route blinding: support forwarding as the intro node</a></li>
Support receiving to multi-hop blinded paths</a></li>
Refactor commitment broadcast to always go through OnchainTxHandler</a></li>
Provide inbound HTLC preimages to the EcdsaChannelSigner</a></li>
</ul>
lnd</a></h3>

tlv: add new RecordT[T] utility type</a></li>
neutrino remove sweeptx</a></li>
multi: query chan update timestamps</a></li>
rpc: add gettx command to walletrpc</a></li>
routing: launch fetchFundingTx in goroutine so router can exit</a></li>
</ul>


Socratic Seminar 1
2023-11-07T00:00:00+00:00
Housekeeping</h2>

This meetup is generously sponsored by Digital Garage</a>, Hivemind Ventures</a>, and CardCoins</a>.</li>
Questions are encouraged, including basic ones!</li>
Socratic Seminars are held under the Chatham House Rule</a>: share the information you receive, but do not reveal the identity of who said it.</li>
For the privacy of other attendees, please refrain from taking photographs of other people without their permission.</li>
Socratic seminars are best when the moderator can let the conversation flow, so try to keep things concrete and focused.</li>
The reading list covers October 1st to November 3rd.</li>
</ul>
Presentation</h2>

Max Fang</a> co-founder of Lexe</a></li>
</ul>
Chain Weather Report</h2>

Mempool.space Lightning Dashboard</a></li>
Clark Moody Dashboard</a></li>
</ul>
News</h2>

River publishes report detailing Lightning Network growth</a></li>
Blockstream officially launches Greenlight LaaS</a></li>
LightningTipBot lost 30% of channels in force-close incident</a></li>
Mononaut writes a thread explaining cycling attacks</a></li>
Doppler: a lightning domain-specific language</a></li>
</ul>
Miscellaneous</h2>

October 2023 Lightning spec meeting</a></li>
On solving pinning, replacement cycling and mempool issues for bitcoin second-layers</a></li>
Removing channel reserve for mobile wallet users</a></li>
</ul>
Releases</h2>

LDK 0.0.118</a></li>
lnd v0.17.0-beta</a></li>
</ul>
Noteworthy PRs</h2>
Core Lightning</a></h3>

Allow even unknown messages, by registration, and allow sending them</a></li>
addpsbtoutput: New onchain command for PSBT output and splice_out tests</a></li>
Fee hysteresis updates</a></li>
Fuzzing-Found BOLT11 crashes</a></li>
</ul>
eclair</a></h3>

Ignore disabled edges for routing messages</a></li>
Adapt max HTLC amount to balance</a></li>
Poll bitcoind at startup instead of trying only once</a></li>
Assume widely supported features</a></li>
Splice with pending committed htlcs</a></li>
Improve startup resource usage</a></li>
Allow splicing on non dual-funded channels</a></li>
</ul>
LDK</a></h3>

Move the historical bucket tracker to 32 unequal sized buckets</a></li>
BOLT 12 Offers message flow</a></li>
Monitor updating persister</a></li>
Set a default max_total_routing_fee_msat of 1% + 50sats</a></li>
Try to overpay the recipient if we fail to find a path at all and limit overpay #2604</a></li>
Use correct to_remote script in counterparty commitments</a></li>
Allow retrieval of SpendableOutputDescriptors from relevant transactions</a></li>
More flexible fee rate estimates</a></li>
</ul>
lnd</a></h3>

multi: pong enforcement</a></li>
invoices: refactor InvoiceDB</code> to eliminate ScanInvoices</code></a></li>
Add more information when a co-op close is failing.</a></li>
input+sweep: make sure input with no fee rate is not added to cluster</a></li>
sweeper: relax anchor sweeping when there's no deadline pressure</a></li>
tlv: fuzz test encoding/decoding</a></li>
funding: wait for coinbase maturity before sending channel_ready</a></li>
peer: launch persistent peer pruning in background goroutine</a></li>
</ul>
Socratic Seminar 18

Noteworthy PRs</h2>

Socratic Seminar 17

Housekeeping</h2> Questions are encouraged, including basic ones!</li>

Noteworthy PRs</h2>

Socratic Seminar 16

Housekeeping</h2> Questions are encouraged, including basic ones!</li>

Noteworthy PRs</h2>

Socratic Seminar 15

Presentation</h2> Steve Lee - Preview of Steve's presentation for lightning++ in Berlin</p>

Noteworthy PRs</h2>

Security</h2>

Socratic Seminar 14

Discussion</h2>

Noteworthy PRs</h2>

Socratic Seminar 13

Discussion</h2>

Noteworthy PRs</h2>

Socratic Seminar 12

Discussion</h2>

Noteworthy PRs</h2>

Security</h2> N/A</li> </ul>

Socratic Seminar 11

Discussion</h2>

Noteworthy PRs</h2>

Security</h2>

Socratic Seminar 10

Discussion</h2>

Noteworthy PRs</h2>

Socratic Seminar 9

Discussion</h2>

Noteworthy PRs</h2>

Socratic Seminar 8

Discussion</h2>

Releases</h2> Core Lightning 24.08</a> & Core Lightning 24.08.1</a></li> LDK 0.0.124</a></li> LND 0.18.3beta</a> (Release notes</a>)</li> Phoenix mobile 2.4.0 & phoenixd 0.4.0</a> Increased BOLT12 invoice expiry to 24 hours</li> </ul> </li>

Noteworthy PRs</h2>

Presentation</h2>
Steve Lee - Preview of Steve's presentation for lightning++ in Berlin</p>

Security</h2>

N/A</li> </ul>
