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2015 indexed events in 74 months

2018 | 2019 | 2020 | 2021

July 2024

  • Cluster mempool
    • Introduction to cluster linearization 🔗
    • Discussion about replacing CPFP carve-out with either TRUC or RBFR to unblock cluster mempool 🔗
    • Question: why is restructure of mempool required with cluster mempool? 🔗
  • CVEs (various)
    • Remote code execution due to bug in miniupnpc, similar to CVE-2015-6031 🔗
    • CVE-2020-14198: Unbound Bitcoin Core ban list CPU/memory DoS 🔗
    • CVE-2015-3641: out-of-memory crash when Bitcoin Core would accept over 4 GB in messages from peers 🔗
  • Free relay
    • Disclosure of a free relay attack exploiting differences in RBF policy 🔗
    • Discussion of free relay related to replace-by-feerate proposals 🔗
  • Offers
    • Discussion of fully implementing offers versus incremently adding features from it 🔗
    • Core Lightning #7461 adds support for nodes to self-fetch and self-pay BOLT12 offers and invoices 🔗
  • Onion messages
    • Core Lightning #7455 makes multiple changes to its onion message defaults 🔗
    • BOLTs #1173 makes the channel_update field optional in failure onion messages 🔗
  • Pooled mining
    • Bitcoin Core #30200 adds a new mining interface to better support Stratum v2 in the future 🔗
    • Stratum.work website with real-time visualization of Stratum messages from several mining pools 🔗
  • AssumeUTXO
    • Bitcoin Core #30320 only loads a AssumeUTXO snapshot if it’s the ancestor of the most-PoW chain 🔗
  • Async payments
    • LDK #3125 introduces support for encoding and parsing messages needed for async payments 🔗
  • HD key generation
    • BIP328 added with a specifications BIP32-compatible MuSig2 key derivation 🔗
  • Just-In-Time (JIT) channels
    • BLIPs #25 allows accepting underfunded HTLCs in support of JIT channel creation 🔗
  • Miniscript
    • BIP379 added with a specification for Miniscript 🔗
  • MuSig
    • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
  • Output script descriptors
    • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
  • Partially signed bitcoin transactions
    • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
  • Rendez-vous routing
    • Proposed BLIP for adding a blinded path field to BOLT11 invoices 🔗
  • Replace-by-fee (RBF)
    • Question: why does RBF rule #3 exist? 🔗
  • Responsible disclosures
    • Peter Todd responsibly disclosed a free relay attack exploiting RBF policy differences 🔗
  • Testnet
    • Bitcoin Core PR Review Club about testnet4 🔗
  • Threshold signature
    • ChillDKG distributed key generation protocol for FROST 🔗
  • Time warp
    • Question: how many blocks per second can sustainably be created using a time warp attack? 🔗
  • Timelocks
    • BIP46 added for timelocked fidelity bonds 🔗
  • Version 3 transaction relay
    • Criticism of motivations for preferring TRUC over replace-by-feerate as a pinning solution 🔗

June 2024

  • Offers
    • LDK #3078 adds support for inspection of BOLT12-returned invoices before payment 🔗
    • LDK #3082 adds an interface for building static reusable offers 🔗
  • Onion messages
    • BLIPs #32 adds BLIP32 describing DNS-based payment instructions with onion messages 🔗
    • Eclair #2854 and LDK #3083 implement BOLTs #1163 to make message delivery failures more private 🔗
  • Rendez-vous routing
    • LDK #3080 allows creating either compact or regular binded paths 🔗
    • Eclair #2867 defines an encoded node ID to use to identify mobile wallets in blinded paths 🔗
  • Silent payments
    • Continued discussion about using PSBTs with silent payments 🔗
    • BIPs #1620 and #1622 make minor updates to the BIP352 specification of silent payments 🔗
  • Version 3 transaction relay
    • BIPs #1541 adds BIP431 with a specification of TRUC transactions 🔗
    • Bitcoin Core #29496 makes TRUC transactions standard 🔗
  • Anchor outputs
    • Core Lightning #7388 removes the ability to create old non-zero-fee anchor-style channels 🔗
  • Channel commitment upgrades
    • BOLTs #869 introduces a new channel quiescence protocol, in part for channel upgrades 🔗
  • CLTV expiry delta
    • LND #8491 adds a cltv_expiry flag on the lncli RPC commands addinvoice and addholdinvoice 🔗
  • Coin selection
    • Effect of SubtractFeeFromOutputs on coin selection in Bitcoin Core 🔗
  • Covenants
    • Idea to add covenants to Bitcoin without consensus changes using functional encryption 🔗
  • Fee estimation
    • LND #8730 introduces an RPC command lncli wallet estimatefee 🔗
  • OP_CAT
    • OP_CAT script to validate proof of work 🔗
  • Package relay
    • Bitcoin Core #28984 adds support for a limited version of package replace-by-fee 🔗
  • Payment probes
    • LDK #3103 begins using data collected from frequent probing in its testing benchmarks 🔗
  • Partially signed bitcoin transactions
    • Continued discussion about using PSBTs with silent payments 🔗
  • Quantum resistance
    • Draft BIP for quantum-safe address format 🔗
  • Replace-by-fee (RBF)
    • Bitcoin Core #28984 adds support for a limited version of package replace-by-fee 🔗
  • Responsible disclosures
    • Matt Morehouse responsibly disclosed vulnerability affecting LND onion packet parsing 🔗
  • Testnet
    • BIP and experimental implementation of testnet4 🔗
  • Time warp
    • Draft BIP for testnet4 includes fix for time warp attack 🔗
  • Version 2 P2P transport
    • Rust Bitcoin #2644 adds HKDF component in support of a BIP324 implementation 🔗
  • X-only public keys
    • Should an even Y coordinate be enforced after every key-tweak operation, or only at the end? 🔗

May 2024

  • Output script descriptors
    • Notes from Bitcoin developer discussion about descriptors for silent payments 🔗
    • BIP388 added with wallet policies for descriptor wallets 🔗
    • BIPs #1567 adds BIP387 with new multi_a() and sortedmultia_a() descriptors 🔗
  • Package relay
    • BIP331 assigned to ancestor package relay proposal 🔗
    • Bitcoin Core #28970 adds support for one-parent-one-child (1p1c) package relay with no P2P changes 🔗
    • Bitcoin Core #30000 indexes orphan txes by wtxid, removing a problem with orphan-based package relay 🔗
  • Silent payments
    • Notes from Bitcoin developer discussion about multiple aspects of silent payments 🔗
    • BIPs #1458 adds BIP352 for silent payments 🔗
    • Discussion about using PSBTs with silent payments 🔗
  • Onion messages
    • LDK #2973 adds support for intercepting onion messages to facilitate async payments 🔗
    • CLN #7304 adds support for direct peer connections for message relay 🔗
  • OP_CAT
    • BIPs #1525 adds BIP347 which proposes an OP_CAT opcode for tapscript 🔗
    • Bitcoin Inquisition 27.0 begins enforcing OP_CAT on signet 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Exploding keys, a soft fork proposal with similar capabilities to CTV 🔗
    • BIP119 extensions for smaller hashes and arbitrary data commitments 🔗
  • Accountable Computing Contracts
    • BitVMX: an alternative to BitVM for verification of program execution 🔗
  • AssumeUTXO
    • Notes from Bitcoin developer discussion about assumeUTXO for mainnet 🔗
  • Async payments
    • LDK #2973 adds support for intercepting onion messages to facilitate async payments 🔗
  • Channel announcements
    • New anonymous usage tokens proposed that could be used to improve channel announcement privacy 🔗
  • Channel commitment upgrades
    • Analysis of multiple proposals for upgrading LN channels 🔗
  • Codex32
    • Penlock proposed as an alternative to codex32 that provides BIP39 seed phrase splitting 🔗
  • Coin selection
    • Notes from Bitcoin developer discussion about coin selection 🔗
  • Consensus cleanup soft fork
    • Notes from Bitcoin developer discussion about consensus cleanup 🔗
  • Cross-input signature aggregation (CISA)
    • Notes from Bitcoin developer discussion about CISA 🔗
  • Ecash
    • Proposal to pay miners with ecash 🔗
  • Hash Time Locked Contract (HTLC)
    • Core Lightning #7190 introduces chainlag to allow safely sending payments during block sync 🔗
  • Miniscript
    • Draft BIP proposed for miniscript 🔗
  • OP_CHECKSIGFROMSTACK
    • Lamport signatures providing OP_CSFS alternative without consensus changes 🔗
  • Partially signed bitcoin transactions
    • Discussion about using PSBTs with silent payments 🔗
  • Quantum resistance
    • Consensus-enforcement of quantum-resistant lamport signatures without consensus changes 🔗
  • Signet
    • Notes from Bitcoin developer discussion about signet and testnet4 🔗
  • Simple taproot channels
    • Discussion of channel upgrade methods, such as switching to simple taproot channels 🔗
  • Testnet
    • CoreDev.tech Berlin event with discussion about testnet4 🔗
  • Utreexo
    • Release of utreexod beta 🔗

April 2024

  • Replace-by-fee (RBF)
    • Bitcoin Core #29242 lays the groundwork for package replace by fee 🔗
    • Analysis of how cluster mempool would’ve affected RBF in 2023 🔗
    • Question about the size of transactions that opt-in to RBF, opt-out of RBF, and replacements 🔗
  • Cluster mempool
    • Bitcoin Core #29242 introduces utility functions to compare two feerate diagrams 🔗
    • Analysis: what would have happened if cluster mempool had been deployed a year ago? 🔗
  • Consensus cleanup soft fork
    • Renewed discussion of consensus cleanup soft fork 🔗
    • Question: where exactly is the ‘off-by-one’ difficulty bug and how does it relate to time warp? 🔗
  • Accountable Computing Contracts
    • Development of domain-specific languages for smart contracting, including with BitVM 🔗
  • Accidental confiscation
    • Amnesty proposed for potential old uses of OP_CODESEPARATOR in new cleanup proposal 🔗
  • Coin selection
    • LND #8515 updates multiple RPCs to accept the name of the coin selection strategy to be used 🔗
  • Compact block relay
    • Proposal to use weak blocks to improve compact block relay when mempool policies diverge 🔗
  • Duplicate transactions
    • Updated consensus cleanup proposal to address Block 1,983,702 problem 🔗
  • Eclipse attacks
    • Bitcoin Core #29850 limits the max number of IP addresses accepted from an individual DNS seed 🔗
  • Fee estimation
    • Discussion about weak blocks helping with feerate estimation 🔗
  • Gap limits
    • BDK #1351 makes several changes to how BDK interprets the stop_gap parameter 🔗
  • Package relay
    • Bitcoin Core #29242 lays the groundwork for package replace by fee 🔗
  • Rendez-vous routing
    • LND #8159 and #8160 add experimental support for sending payments to blinded routes 🔗
  • Taproot
    • Rust Bitcoin #2652 begins returning the internal taproot key when signing for a taproot input 🔗
  • Testnet
    • Discussion about resetting and modifying testnet 🔗
  • Time warp
    • Question: where exactly is the ‘off-by-one’ difficulty bug and how does it relate to time warp? 🔗
  • Transaction pinning
    • Discussion about weak blocks helping with transaction pinning 🔗
  • Version 3 transaction relay
    • Bitcoin Core #29242 lays the groundwork for package replace by fee with v3-compatible packages 🔗

March 2024

  • Dual funding
    • Eclair #2829 allows plugins to set a policy for contributing funds in a dual-funded channel open 🔗
    • LDK #2419 adds a state machine for handling interactive transaction construction 🔗
  • Partially signed bitcoin transactions
    • Rust Bitcoin #2458 adds support for signing PSBTs that include taproot inputs 🔗
    • BTCPay Server #5852 adds support for scanning BBQr animated QR codes 🔗
  • Coin selection
    • LND #8378 makes several improvements to LND’s coin selection features 🔗
  • Fee estimation
    • Discussion of incorporating live mempool data into Bitcoin Core’s feerate estimation 🔗
  • Fee sourcing
    • More efficient fee sponsorship for exogenous fees compared favorably to endogenous fees 🔗
  • Fee sponsorship
    • Proposals for more block space efficient transaction fee sponsorship 🔗
  • Free relay
    • Disclosure of a free relay attack against Bitcoin Core and some other nodes 🔗
  • Kindred replace by fee
    • Bitcoin Core #29306 adds sibling eviction for unconfirmed v3 transaction children 🔗
  • Miniscript
    • Ledger Bitcoin App 2.2.0 adds miniscript support for taproot 🔗
  • MuSig
    • PSBTs for multiple concurrent MuSig2 signing sessions 🔗
  • OP_CAT
    • Bitcoin PR Review Club for OP_CAT on signet with Bitcoin Inquisition 🔗
  • Payment probes
    • LND #8136 updates the EstimateRouteFee RPC to use payment probing 🔗
  • Replace-by-fee (RBF)
    • BitGo adds RBF support 🔗
  • Schnorr signatures
    • Explanation for why BIP340 uses secp256k1 instead of a different curve 🔗
  • Simple taproot channels
    • LND #8499 makes significant changes to the TLV types used for simple taproot channels 🔗
  • Simplicity
    • Comparisons betwen Simplicity and BTC Lisp 🔗
  • Soft fork activation
    • Trustless onchain betting on potential soft forks 🔗
  • Splicing
    • Phoenix Wallet v2.2.0 adds support for splicing using the quiescence protocol 🔗
  • Spontaneous payments
    • LDK #2935 begins supporting sending keysend payments to blinded paths 🔗
  • Trampoline payments
    • LDK #2756 adds support for including a trampoline routing packet in its messages 🔗
  • Version 2 P2P transport
    • New project to create a BIP324 proxy for light clients 🔗
  • Vaults
    • BIPs #1421 adds BIP345 for the OP_VAULT opcode and related consensus changes 🔗

February 2024

  • Version 3 transaction relay
    • Challenges opening zero-conf channels when using the initially allowed v3 transaction topology 🔗
    • Ideas for post-v3 relay enhancements after cluster mempool is deployed 🔗
    • Research about historic use of anchor outputs for possibly imbuing them with v3 properties 🔗
    • Bitcoin Core #28948 adds support for (but does not enable) version 3 transaction relay 🔗
  • Anchor outputs
    • Research about historic use of anchor outputs for possibly imbuing them with v3 properties 🔗
    • Core Lightning #6785 makes anchor-style channels the default 🔗
    • Eclair #2816 allows the node operator to choose the max fee for an anchor output 🔗
  • Dual funding
    • Requirement to verify external inputs use segwit in dual funding and related protocols 🔗
    • BOLTs #851 adds support for dual funding and interactive tx construction to the LN specification 🔗
    • LDK #2770 begins preparing to later add support for dual-funded channels 🔗
  • Cluster mempool
    • Cluster mempool could help solve challenges opening zero-conf channels with v3 transaction relay 🔗
    • Ideas for post-v3 relay enhancements after cluster mempool is deployed 🔗
  • Coin selection
    • Bitcoin Core #27877 updates Bitcoin Core’s wallet with CoinGrinder coin selection strategy 🔗
    • New coin selection strategy for LN liquidity providers 🔗
  • Ecash
    • Discussion of the design of Cashu and other ecash systems 🔗
    • Sending and receiving ecash using LN and ZKCPs 🔗
  • Replace-by-fee (RBF)
    • Proposal for replace-by-feerate to avoid transaction pinning 🔗
    • Pure replace by feerate is not guaranteed to be incentive compatible 🔗
  • Accountable Computing Contracts
    • Sending and receiving ecash using LN and ZKCPs 🔗
  • Compact block relay
    • Improvements to compact block peer selection made to address block stalling attack 🔗
  • Eclipse attacks
    • Improved reproducible ASMap creation process 🔗
  • Free relay
    • Concern about replace by feerate allowing free relay 🔗
  • HD key generation
    • Rust Bitcoin #2451 removes the requirement that an HD derivation path start with an m 🔗
  • Kindred replace by fee
    • What if v3 semantics and sibling replacement had been applied to anchor outputs a year ago? 🔗
  • Offers
    • Human readable payment instructions proposed that are compatible with offers 🔗
  • OP_CAT
    • Simple vault prototype using OP_CAT and schnorr signatures 🔗
  • Payjoin
    • Mutiny Wallet v0.5.7 adds support for payjoin 🔗
  • Pooled mining
    • How does the TIDES payout scheme work? 🔗
  • Responsible disclosures
    • Eugene Siegel responsibly disclosed a Bitcoin Core block stalling bug affecting LN 🔗
  • Silent payments
    • Human readable payment instructions proposed that are compatible with silent payment addresses 🔗
  • Splicing
    • Challenges with splicing and zero-conf channels when using v3 transaction topology 🔗
  • Taproot
    • Taproot massively reduces worst case bandwidth for malleablity protection in contract protocols 🔗
  • Testnet
    • Core Lightning 24.02 includes the fix for a transaction parsing bug on testnet 🔗
  • Transaction pinning
    • Proposal for replace-by-feerate to avoid transaction pinning 🔗
  • Version 2 P2P transport
    • Bitcoin Core #29347 enables v2 P2P transport by default 🔗
  • Vaults
    • Simple vault prototype using OP_CAT and schnorr signatures 🔗
  • Zero-conf channels
    • Challenges opening zero-conf channels when using the initially allowed v3 transaction topology 🔗

January 2024

  • Version 3 transaction relay
    • Discussion about the costs of pinning when v3 policies are used 🔗
    • Discussion about LN anchors and v3 transaction relay proposal 🔗
    • Discussion about cluster mempool and a need for a CPFP carve out replacement like v3 relay 🔗
    • Proposed changes to LN for v3 relay and ephemeral anchors 🔗
    • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
  • Cluster mempool
    • Discussion about cluster fee estimation 🔗
    • Overview of cluster mempoool, including discussion about its effect on CPFP carve-out 🔗
    • Interplay between cluster mempool, CPFP carve-out removal, and LN use of v3 relay 🔗
    • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
  • Ephemeral anchors
    • Discussion about ephemeral anchors for LN and v3 transaction relay proposal 🔗
    • Discussion about cluster mempool and a need for a CPFP carve out replacement like ephemeral anchors 🔗
    • Discussion about Miner Extractable Value (MEV) in non-zero ephemeral anchors 🔗
    • Proposed changes to LN for v3 relay and ephemeral anchors 🔗
  • Fee sourcing
    • Argument that frequent use of exogenous fees may put mining decentralization at risk 🔗
    • Implications of exogenous fees on safety, scalability, and costs 🔗
    • An alternative to exogenous anchor outputs: endogenous fees with presigned incremental RBF bumps 🔗
    • Opposition to CTV based on commonly requiring exogenous fee 🔗
  • Rendez-vous routing
    • LDK #2781 and #2688 update support for sending and receiving blinded payments 🔗
    • LND #8095 and #8142 add additional logic to parts of LND’s codebase for handling binded paths 🔗
    • LDK #2791, #2801, and #2812 complete adding support for route blinding 🔗
    • Eclair #2811 allows trampoline payments to use a blinded path for the ultimate receiver 🔗
  • Responsible disclosures
    • Niklas Gögge responsibly disclosed two vulnerabilities affecting LND 🔗
    • Matt Morehouse responsibly disclosed vulnerability affecting Core Lightning 🔗
    • Niklas Gögge responsibly disclosed a consensus bug affecting btcd 🔗
  • Channel factories
    • Proposal for fee-dependent timelocks that would make mass factory closures more safe 🔗
    • Proposal for a mass-exit protocol that allows highly efficient payment batching 🔗
  • CPFP carve out
    • Discussion about the incompatibility between cluster mempool and CPFP carve-out 🔗
    • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
  • Joinpools
    • Proposal for fee-dependent timelocks that would make mass joinpool closures more safe 🔗
    • Proposal for a mass-exit protocol that allows highly efficient payment batching 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Mashup of OP_CTV and OP_CSFS proposed, along with new OP_INTERNALKEY 🔗
    • Opposition to CTV based on commonly requiring exogenous fee 🔗
  • Out-of-band fees
    • Discussion about the effect of out-of-band fees on proposed fee-dependent timelocks 🔗
    • Frequent use of exogenous fees may risk mining decentralization due to out-of-band fees 🔗
  • Output script descriptors
    • How to specify unspendable keys in descriptors 🔗
    • Proposed BIP specifying how to include descriptors in PSBTs 🔗
  • Trampoline payments
    • Eclair #2810 allows trampoline routing infomation to use more than 400 bytes 🔗
    • Eclair #2811 allows trampoline payments to use a blinded path for the ultimate receiver 🔗
  • Trimmed HTLC
    • Discussion about placing trimmed HTLC value in ephemeral anchor outputs and consequences for MEV 🔗
    • Continued discussion about placing trimmed HTLC value in ephemeral anchor outputs 🔗
  • Accountable Computing Contracts
    • Verification of arbitrary programs using proposed opcode from MATT 🔗
  • Anchor outputs
    • Discussion about LN anchors and v3 transaction relay proposal 🔗
  • Annex
    • Suggestion to store fee-dependent timelock parameters in the taproot annex 🔗
  • Anonymity networks
    • Bitcoin Core #29200 allows the I2P to use connections encrypted with both ECIES-X25519 and ElGamal 🔗
  • CLTV expiry delta
    • LN-Symmetry requires longer CLTV expiry deltas than expected 🔗
  • Coin selection
    • New coin selection strategies proposed and tested for Bitcoin Core 🔗
  • Eltoo
    • LN-Symmetry research implementation with summary of initial results 🔗
  • Expiration floods
    • Mitigating expiration floods with fee-depedent timelocks 🔗
  • Fee estimation
    • Cluster fee estimation to improve accuracy in a world with CPFP fee bumping 🔗
  • Free relay
    • Node operator goals include maximizing miner revenue without allowing free relay 🔗
  • Kindred replace by fee
    • Kindred replace by fee 🔗
  • MATT
    • Verification of arbitrary programs using proposed opcode from MATT 🔗
  • Onion messages
    • LDK #2723 adds support for sending onion messages using direct connections 🔗
  • OP_CHECKSIGFROMSTACK
    • Mashup of OP_CTV and OP_CSFS proposed, along with new OP_INTERNALKEY 🔗
  • Payment batching
    • Proposal for a pool exit protocol that allows highly efficient payment batching 🔗
  • Partially signed bitcoin transactions
    • Proposed BIP specifying how to include descriptors in PSBTs 🔗
  • Replace-by-fee (RBF)
    • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
  • Simple taproot channels
    • LND #7733 updates its watchtower support for simple taproot channels 🔗
  • Statechains
    • Mercury Layer announced as an implementation of statechains using blind signing 🔗
  • Timelocks
    • Soft fork proposal for fee-dependent timelocks 🔗
  • Transaction pinning
    • Discussion about the costs of pinning when v3 transaction relay policies are used 🔗
  • Unannounced channels
    • Core Lightning #6869 updates the listchannels RPC to no longer list unannounced channels 🔗
  • Version 2 P2P transport
    • Bitcoin Core #29058 begins using v2 P2P transport by default for some connections 🔗
  • Watchtowers
    • LND #7733 updates its watchtower support for simple taproot channels 🔗

December 2023

November 2023

October 2023

  • Replace-by-fee (RBF)
    • Replacement cycle attacks on HTLCs 🔗
    • Proposal for miners to automatically retry previously replaced transactions 🔗
    • Recommendation to RBF fee bump pre-signed transactions with more pre-signed transactions 🔗
    • Summary of well-known behavior for wallets to avoid when creating multiple replacements 🔗
  • AssumeUTXO
    • Bitcoin Core #27596 adds assumedvalid snapshot chainstate and full validation sync in the background 🔗
    • Bitcoin Core bug found in computation of UTXO set hash 🔗
  • Covenants
    • Draft BIP specification for OP_TXHASH proposed 🔗
    • Research into minimal opcodes for output script introspection to enable covenants 🔗
  • Hash Time Locked Contract (HTLC)
    • Replacement cycle attacks on HTLCs 🔗
    • OP_EXPIRE opcode proposed that may help mitigate transaction pinning of HTLCs 🔗
  • Transaction pinning
    • Replacement cycle attack against HTLCs creating pinning-like problems 🔗
    • OP_EXPIRE opcode proposed that may help mitigate transaction pinning of HTLCs 🔗
  • Accountable Computing Contracts
    • BitVM: payments contingent on arbitrary computation without consensus changes 🔗
  • CLTV expiry delta
    • Longer CLTV expiry deltas as a mitigation against replacement cycling attacks 🔗
  • Compact block filters
    • LND v0.17.0-beta released with improved compact block filter speed through batched downloading 🔗
  • Miniscript
    • Bitcoin Core #27255 ports miniscript to tapscript, providing tapscript descriptors 🔗
  • Multipath payments
    • Dynamic Payment Switching and Splitting (PSS) proposed for improved payment privacy 🔗
  • MuSig
    • Proposed BIP for MuSig2 fields in PSBTs 🔗
  • OP_CAT
    • Proposed BIP for OP_CAT 🔗
  • Output script descriptors
    • Bitcoin Core #27255 ports miniscript to tapscript, providing tapscript descriptors 🔗
  • Package relay
    • Bitcoin Core #27609 makes the submitpackage RPC available on non-regtest networks 🔗
  • Payment probes
    • Dynamic Payment Switching and Splitting (PSS) proposed to thwart Balance Discovery Attacks 🔗
  • Partially signed bitcoin transactions
    • Proposed BIP for MuSig2 fields in PSBTs 🔗
  • Rendez-vous routing
    • LND #7267 makes it possible to create routes to blinded paths 🔗
  • Responsible disclosures
    • Antoine Riard responsibly discloses replacement cycle attacks affecting all HTLC-using software 🔗
  • Taproot
    • LND v0.17.0-beta ships with experimental support for taproot and MuSig2 LN channels 🔗
  • Tapscript
    • Research showing effect of OP_SUCCESSx on covenants using output script introspection 🔗
  • Transaction origin privacy
    • Replacement cycle mitigation of frequent transaction rebroadcasting with potential privacy reduction 🔗
  • Unannounced channels
    • LND v0.17.0-beta ships with experimental support for unannounced taproot and MuSig2 LN channels 🔗
  • Version 2 P2P transport
    • Bitcoin Core #28331 adds optional support for v2 encrypted P2P transport 🔗
  • Version 3 transaction relay
    • Replacement cycle attacks not solved by current v3 transaction relay policies 🔗

September 2023

  • Version 2 P2P transport
    • Bitcoin Core PR Review Club summary about internal serialization changes for BIP324 🔗
    • Bitcoin Core #28196 adds a substantial portion of the code to provide BIP324 support 🔗
  • Ark
    • Improving LN scalability with covenants in a similar way to Ark 🔗
  • Channel factories
    • Using covenants to improve LN scalability through extremely efficient channel factories 🔗
  • Client-side validation
    • Specifications published for taproot assets 🔗
  • Coin selection
    • Bitcoin Core #26152 now pays any fee deficit for unconfirmed outputs chosen by coin selection 🔗
  • Covenants
    • Using covenants like OP_CTV and APO to improve LN scalability 🔗
  • Eltoo
    • Using eltoo-compatible covenants to improve LN scalability 🔗
  • Expiration floods
    • Concern about forced expiration spam in very large channel factories 🔗
  • Miniscript
    • Bitcoin Core #26567 computes input weight for fee estimation using miniscript and descriptors 🔗
  • MuSig
    • LND #7994 adds RPC support for remote signing with the MuSig2 protocol 🔗
  • Offers
    • LDK #2371 adds support for managing payments using offers 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Using covenants like OP_CTV and APO to improve LN scalability 🔗
  • Payment probes
    • LDK #2534 adds additional support for pre-payment probing 🔗
  • Point Time Locked Contracts (PTLCs)
    • Summary of proposed LN messaging changes for PTLCs 🔗
  • Rendez-vous routing
    • LDK #2413 adds support for sending and receving payments with blinded paths 🔗
  • SIGHASH_ANYPREVOUT
    • Using covenants like OP_CTV and APO to improve LN scalability 🔗
  • Simple taproot channels
    • Specifications for taproot assets released based on LND’s experimental simple taproot channels 🔗
  • Testnet
    • Bitcoin Core #28354 begins rejecting non-standard transactions by default on testnet 🔗
  • Threshold signature
    • Idea for privacy enhanced transaction cosigning using FROST 🔗

August 2023

  • MuSig
    • Discussion about blind MuSig2 signing for statechains 🔗
    • Field Report: Implementing MuSig2 by Brandon Black from BitGo 🔗
    • LND #7904 adds experimental support for taproot channels based on MuSig2 🔗
  • OP_CHECKSIGFROMSTACK
    • Fraud proofs for outdated backup state enforcable onchain with OP_CSFS + OP_CAT 🔗
    • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
  • Responsible disclosures
    • Milk Sad team disclosed CVE-2023-39910 insecure entropy in Libbitcoin bx command 🔗
    • Matt Morehouse disclosed fake channels vulnerability against four major LN node implementations 🔗
  • Silent payments
    • Bitcoin Core PR Review Club summary of #28122 adding silent payments 🔗
    • Proposal to add expiration metadata to silent payment addresses 🔗
  • Splicing
    • Eclair #2680 adds quiescence negotiation for splicing 🔗
    • Core Lightning #6253 and #5675 add an experimental implementation of splicing 🔗
  • Channel jamming attacks
    • DoS protection design philosophy and example of forward commitment fees and reverse hold fees 🔗
  • Codex32
    • Core Lightning #6466 and #6473 add support for backing up and restoring codex32-encoded seeds 🔗
  • Covenants
    • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
  • CVEs (various)
    • Milk Sad team disclosed CVE-2023-39910 insecure entropy in Libbitcoin bx command 🔗
  • Ecash
    • Discussion of ecash in the context of blind MuSig2 signing 🔗
  • Eclipse attacks
    • Bitcoin Core #27213 will attempt to open and maintain one connection on each reachable network 🔗
  • Generic signmessage
    • Sparrow 1.7.8 adds support for BIP322 generic signmessage 🔗
  • HTLC endorsement
    • HTLC endorsement testing and data collection 🔗
  • MATT
    • What opcodes are part of the MATT proposal? 🔗
  • Onion messages
    • BOLTs #759 adds support for onion messages to the LN specification 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
  • Payjoin
    • Discussion about draft BIP for serverless payjoin 🔗
  • Peer storage
    • Fraud proofs for outdated state compared to peer storage backups 🔗
  • Rendez-vous routing
    • LDK #2411 and #2412 add an API for constructing payment paths for blinded payments 🔗
  • Replace-by-fee (RBF)
    • Proposal to enable full-RBF by default 🔗
  • SIGHASH_ANYPREVOUT
    • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
  • Simple taproot channels
    • LND #7904 adds experimental support for simple taproot channels 🔗
  • Statechains
    • Discussion about blind MuSig2 signing for statechains 🔗
  • Threshold signature
    • Experimental implementation of FROST announced 🔗
  • Trimmed HTLC
    • BOLTs #919 suggests nodes stop accepting additional trimmed HTLCs beyond a certain value 🔗
  • Uneconomical outputs
    • BOLTs #919 suggests LN nodes limit their maximum exposure to uneconomical HTLCs 🔗
  • Utreexo
    • Libflorestra library announced for using utreexo in applications 🔗
  • Version 2 P2P transport
    • Bitcoin Core #28008 adds encryption and decryption routines for v2 transport protocol encryption 🔗
  • Watchtowers
    • LDK #2337 makes it easier to use LDK for building watchtowers 🔗

July 2023

June 2023

  • Channel jamming attacks
    • Eclair #2701 now records HTLC receive and settlement times to help with channel jamming mitigation 🔗
    • LND #7710 allows retrieving extra data about an HTLC in support of jamming countermeasures 🔗
  • Coinjoin
    • Discussion about risks for coinjoin-style protocols of relaying taproot annexes 🔗
    • Preventing coinjoin pinning with v3 transaction relay 🔗
  • HTLC endorsement
    • Eclair #2701 now records HTLC receive and settlement times to help later testing of HTLC endorsement 🔗
    • LND #7710 allows retrieving extra data about an HTLC in support of trying HTLC endorsement 🔗
  • Just-In-Time (JIT) channels
    • Proposal to extend BOLT11 invoices to allow requesting prepayment for submarine swaps 🔗
    • LDK #2319 allows underfunding HTLCs in support of JIT channel creation 🔗
  • Rendez-vous routing
    • LND #7710 adds the ability to retrieve extra data about an HTLC in support of route blinding 🔗
    • LDK #2120 adds support for finding a route to a receiver who is using blinded paths 🔗
  • Anchor outputs
    • LDK #2368 allows manually accepting new channels created by a peer that use anchor outputs 🔗
  • Annex
    • Discussion about the taproot annex 🔗
  • CLTV expiry delta
    • Eclair #2677 raises its max_cltv to 2,016 blocks due widespread increases in CLTV expiry deltas 🔗
  • Dual funding
    • LDK #2077 refactors code to make it easier later to add support for dual funded channels 🔗
  • Eltoo
    • Discussion about the use of the annex field in LN-symmetry 🔗
  • Joinpools
    • Example of using the MATT proposal plus OP_CAT to manage joinpools 🔗
  • MATT
    • Using MATT to replicate CTV and manage joinpools 🔗
  • Multipath payments
    • LDK #2156 adds support for keysend payments that use simplified multipath payments 🔗
  • Onion messages
    • LDK #2294 adds support for replying to onion messages 🔗
  • OP_CAT
    • Example of using the MATT proposal plus OP_CAT to manage joinpools 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Example of using MATT-style covenants to replicate CTV features 🔗
  • Payment secrets
    • LDK #2156 adds support for multipath keysend payments, which require payment secrets 🔗
  • Sidechains
    • Speculatively using hoped-for consensus changes to create two-way pegs for sidechains 🔗
  • Silent payments
    • Draft BIP for silent payments 🔗
  • Spontaneous payments
    • LDK #2156 adds support for keysend payments that use simplified multipath payments 🔗
  • Submarine swaps
    • Proposal to extend BOLT11 invoices to allow requesting prepayment for submarine swaps 🔗
  • Transaction pinning
    • Preventing coinjoin pinning with v3 transaction relay 🔗
  • Version 2 P2P transport
    • Libsecp256k1 #1129 implements the ElligatorSwift technique for establishing v2 P2P connections 🔗
  • Vaults
    • Discussion about storing vault-related data in taproot annexes 🔗
  • Version 3 transaction relay
    • Preventing coinjoin pinning with v3 transaction relay 🔗

May 2023

  • Covenants
    • Analysis of alternative design for OP_VAULT using MATT-style covenants 🔗
    • Proposed joinpool construction for Ark could be less interactive with covenants 🔗
  • Dual funding
    • Challenges with zero-conf channels when dual funding 🔗
    • LDK #1794 begins adding support for dual funding 🔗
  • MuSig
    • Munstr wallet performing MuSig2 communication using the nostr protocol 🔗
    • Lightning Lab’s Loop now uses MuSig2 by default for lower fees and improved privacy 🔗
  • Package relay
    • Summaries of Bitcoin Core developers in-person meeting 🔗
    • Suggestion to perform package relay using Nostr protocol 🔗
  • Partially signed bitcoin transactions
    • Bitcoin Core #25939 allows nodes with txindex enabled to add txs with utxoupdatepsbt RPC 🔗
    • Bitcoin Core #25796 adds a new descriptorprocesspsbt RPC for updating a PSBT 🔗
  • Wallet labels
    • BIPs #1412 updates BIP329 wallet label export with support for key origin information 🔗
    • Nunchuk wallet adds BIP329 wallet label export 🔗
  • Adaptor signatures
    • Analysis of signature adaptor security 🔗
  • Anchor outputs
    • LDK #1841 implements a solution for the fee-stealing attack described in BOLTs #824 🔗
  • Ark
    • Proposal for a managed joinpool protocol 🔗
  • AssumeUTXO
    • Summaries of Bitcoin Core developers in-person meeting 🔗
  • Channel jamming attacks
    • Testing HTLC endorsement for preventing channel jamming attacks 🔗
  • Cluster mempool
    • Bitcoin Core meeting transcript about mempool redesign 🔗
  • Coin selection
    • Bitcoin Core #27021 adds interface for calculating an output’s ancestor fee deficit 🔗
  • Compact block relay
    • Bitcoin Core #27626 allows parallel download of compact blocks from multiple peers 🔗
  • HD key generation
    • ColdCard 6.0.0X adds support for BIP129 exchange of xpubs during multisig wallet set up 🔗
  • HTLC endorsement
    • Testing HTLC endorsement for preventing channel jamming attacks 🔗
  • Just-In-Time (JIT) channels
    • Request for feedback on proposed specifications for LSPs, including LSPS2: JIT channels 🔗
  • Joinpools
    • Proposal for Ark, a managed joinpool protocol 🔗
  • MATT
    • MATT-based vaults 🔗
  • Miniscript
    • MyCitadel v1.3.0 adds more advanced support for miniscript 🔗
  • Scriptless multisignatures
    • Analysis of signature adaptor security when used with multisignatures 🔗
  • OP_CAT
    • Ark proposal would benefit from OP_CAT and OP_CHECKSIGFROMSTACK 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Analysis of alternative design for OP_VAULT using MATT-style covenants and CTV 🔗
  • Out-of-band fees
    • Improvements to features for miners that accept out-of-band fees 🔗
  • Payjoin
    • Advanced payjoin applications, including transaction cut-through 🔗
  • Schnorr signatures
    • BIPs #1446 makes a small change and a number of additions to the BIP340 specification 🔗
  • Signet
    • Mutinynet launches a signet with 30 second block times and hosted infrastructure tools 🔗
  • Silent payments
    • Summaries of Bitcoin Core developers in-person meeting 🔗
  • Utreexo
    • ZeroSync protocol which uses a variation of utreexo 🔗
  • Vaults
    • Analysis of alternative design for OP_VAULT using MATT-style covenants 🔗
  • Zero-conf channels
    • Challenges with zero-conf channels when dual funding 🔗

April 2023

March 2023

  • Codex32
    • Partial checksum verification of codex32-encoded seeds 🔗
    • BIPs #1425 assigns BIP93 to the codex32 seed backup, splitting, verification, and recovery scheme 🔗
  • Soft fork activation
    • PR Review Club meeting about Heretical Deployments used in Bitcoin Inquisition 🔗
    • Question about why Bitcoin Core hasn’t buried the taproot deployment 🔗
  • Annex
    • Bitcoin Inquisition #22 adds an -annexcarrier runtime option 🔗
  • AssumeUTXO
    • Bitcoin Core #25740 allows background validation of bootstrapped UTXO state 🔗
  • Channel factories
    • Improving capital efficiency with multiparty channels in tunable penality channel factories 🔗
  • Covenants
    • Proposal for alternative design for OP_VAULT inspired by OP_TLUV 🔗
  • HD key generation
    • Faster offline verification of BIP32 master seed backups 🔗
  • Offers
    • LDK #1977 allows serializing and deserializing offers 🔗
  • Testnet
    • Service bit for Utreexo set for testing on testnet and signet 🔗
  • Utreexo
    • Service bit for Utreexo 🔗
  • Vaults
    • Proposal for alternative design for OP_VAULT inspired by OP_TLUV 🔗
  • Watchtowers
    • Description of efficient watchtower use in the tunable penalty protocol 🔗

February 2023

  • Channel jamming attacks
    • Summary of call about mitigating LN jamming 🔗
    • Feedback requested on LN good neighbor scoring for local reputation to mitigate jamming 🔗
  • Dual funding
    • Core Lightning #5670 and #5956 make various updates to its implementation of dual funding 🔗
    • Eclair #2596 limits the number of RBF fee bumps in a dual funded channel open 🔗
  • HTLC endorsement
    • Summary of call about mitigating LN jamming 🔗
    • Feedback requested on HTLC endorsement to mitigate jamming 🔗
  • Offers
    • Core Lightning #5892 updates CLN’s implementation of the offers protocol 🔗
    • Eclair #2479 adds support for paying offers 🔗
  • Payjoin
    • Serverless payjoin proposal 🔗
    • BTCPay Server #4600 updates its payjoin implementation to avoid creating unnecessary inputs 🔗
  • Proof of payment
    • LN async proof of payment 🔗
    • Safety notes about CLN signinvoice RPC providing false proof of payment when misused 🔗
  • Splicing
    • Eclair #2540 makes backend preparations for splicing 🔗
    • Eclair #2595 continues the project’s work on adding support for splicing 🔗
  • Spontaneous payments
    • Eclair #2573 begins accepting keysend payments that don’t contain a payment secret 🔗
    • LDK #2002 adds support for automatically resending spontaneous payments 🔗
  • Adaptor signatures
    • Using signature adaptors to prove acceptance of an LN async payment 🔗
  • Anchor outputs
    • LDK #1860 adds support for channels using anchor outputs 🔗
  • Async payments
    • Using adaptor signatures to prove an async payment was accepted 🔗
  • Codex32
    • Proposed BIP for new codex32 seed backup, splitting, verification, and recovery scheme 🔗
  • Coin selection
    • BTCPay Server #4600 updates its coin selection to avoid unnecessary inputs for payjoin 🔗
  • Miniscript
    • Bitcoin Core #24149 adds signing support for P2WSH-based miniscript-based output descriptors 🔗
  • Multipath payments
    • Discussion about using multipath overpayment with recovery to decrease payment latency 🔗
  • MuSig
    • LND #7171 upgrades the signrpc RPC to support the latest draft BIP for MuSig2 🔗
  • Output script descriptors
    • Bitcoin Core #24149 adds signing support for P2WSH-based miniscript-based output descriptors 🔗
  • Peer storage
    • Core Lightning #5361 adds experimental support for peer storage backups 🔗
  • Point Time Locked Contracts (PTLCs)
    • Using signature adaptors with PTLCs to prove acceptance of an LN async payment 🔗
  • Redundant overpayments
    • Using redundant overpayments instead of a quality-of-service flag 🔗
  • Replace-by-fee (RBF)
    • Bitcoin Core #25344 updates the fee-bumping RPCs to allow altering replacement outputs 🔗
  • Stateless invoices
    • LDK #1878 encodes CLTV delta in payment secret for its stateless invoices 🔗
  • Static channel backups
    • Core Lightning #5361 adds experimental support for peer storage backups 🔗
  • Tapscript
    • Description of tapscript signature malleability and proposed fix for SIGHASH_ANYPREVOUT 🔗
  • Vaults
    • Draft BIP available for OP_VAULT and OP_UNVAULT opcodes 🔗
  • Wallet labels
    • Sparrow’s 1.7.2 release adds BIP329 import and export 🔗

January 2023

  • Async payments
    • Eclair #2464 adds a trigger useful for allowing one node to deliver an async payment to a peer 🔗
    • Idea for non-interactive channel open commitments may allow fast rebalancing for async payments 🔗
    • Request for proof that an async payment was accepted 🔗
  • BLS signatures
    • Question about schnorr signatures versus BLS signatures 🔗
  • Covenants
    • Proposal for OP_VAULT and OP_UNVAULT opcodes to enable convenant-based valuts 🔗
  • Discreet Log Contracts (DLCs)
    • Proposal for vault-enabling opcodes could also make DLCs much more efficient 🔗
  • Ephemeral anchors
    • Ephemeral anchors compared to SIGHASH_GROUP 🔗
  • Hardware wallet interface (HWI)
    • Bitcoin Core #21576 allows wallets using an external signer to RBF fee bump 🔗
  • Offers
    • LDK #1738 and #1908 provide additional features for handling offers 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Proposal for OP_UNVAULT opcode that can emulate CTV 🔗
  • Payment batching
    • Proposal for OP_VAULT opcode supports batching vault withdrawals 🔗
  • Proof of payment
    • Request for proof that an async payment was accepted 🔗
  • Rendez-vous routing
    • Eclair #2482 allows sending payments using blinded routes 🔗
  • Replace-by-fee (RBF)
    • Continued RBF discussion, including number of full-RBF nodes, RBF-FSS, and RBF motivation 🔗
  • Signet
    • Question about why signet uses the same bech32 address prefix as testnet 🔗
  • Testnet
    • Question about why both testnet and signet use the tb1 bech32 address prefix? 🔗
  • Vaults
    • Proposal for OP_VAULT and OP_UNVAULT opcodes 🔗
  • Wallet labels
    • BIPs #1383 assigns BIP329 to the proposal for a standard wallet label export format 🔗

December 2022

November 2022

  • Channel jamming attacks
    • Paper suggesting solutions to jamming attacks based on local reputation and upfront fees 🔗
    • Reputation credentials proposal to mitigate LN jamming attacks 🔗
  • Offers
    • Core Lightning #5646 updates the implementation of offers to remove x-only public keys 🔗
    • Eclair #2499 allows specifying a blinded route to use when using a BOLT12 offer 🔗
  • Partially signed bitcoin transactions
    • Rust Bitcoin #957 adds an API for signing PSBTs 🔗
    • LND #7122 adds support for importing PSBTs from binary files 🔗
  • Replace-by-fee (RBF)
    • Discussion about mempoolfullrbf option’s effect on mempool consistency 🔗
    • Continued discussion about enabling full-RBF in Bitcoin Core 🔗
  • X-only public keys
    • Core Lightning #5646 updates the experimental implementation of offers to remove x-only public keys 🔗
    • Libsecp256k1 #993 includes in the default build options a modules for working with x-only pubkeys 🔗
  • Accountable Computing Contracts
    • Proposal for general smart contracts in Bitcoin via covenants 🔗
  • Anchor outputs
    • Proposal to use multiple pre-committed fees to avoid needing anchor outputs in many cases 🔗
  • CLTV expiry delta
    • Eclair #2468 implements BOLTs #1032, allowing accepting a longer expiry than requested 🔗
  • Compact block filters
    • Bitcoin Core #25957 improves the performance of wallet rescans using local block filters 🔗
  • Compact block relay
    • Discussion about inconsistent mempools and how that could affect compact block relay 🔗
  • Covenants
    • Proposal to use covenants and merkle trees to enable generalized smart contracts 🔗
  • Child pays for parent (CPFP)
    • Suggestion for LN to provide an alternative to using CPFP for most HTLC fee bumping 🔗
  • CVEs (various)
    • CVE-2017-12842: Bitcoin Core PR Review Club discussion about lowering min relayable tx size 🔗
  • Erlay
    • Discussion about inconsistent mempools and how that could affect Erlay 🔗
  • HTLC endorsement
    • Paper suggesting HTLC endorsement as part of a mitigation for jamming attacks 🔗
  • Hardware wallet interface (HWI)
    • Bitcoin Core #23578 using HWI to add support for externally signing taproot keypath spends 🔗
  • Low-r grinding
    • BDK #779 adds support for creating low-r signatures 🔗
  • MATT
    • Proposal for general smart contracts in Bitcoin via covenants 🔗
  • Multipath payments
    • BOLTs #1031 allows paying slightly more than the requested amount when using multipath 🔗
  • Rendez-vous routing
    • Core Lightning #5646 adds support for forwarding blinded payments 🔗
  • Responsible disclosures
    • Anthony Towns disclosed a DoS and potential funds loss bug in BTCD and LND 🔗
  • Version 2 P2P transport
    • Request for feedback on message identifiers for v2 P2P encrypted transport 🔗
  • Version 3 transaction relay
    • Comparing disabling non-replaceable transactions to disabling special v3 transaction relay rules 🔗

October 2022

  • Replace-by-fee (RBF)
    • Proposal for relay of v3 transactions allows replacement 🔗
    • Concerns raised about configuration option allowing full replace by fee in Bitcoin Core 🔗
    • History of the term “full RBF” 🔗
    • Continued discussion about mempoolfullrbf option for enabling full RBF 🔗
  • Package relay
    • New proposed v3 transactions designed for use with package relay 🔗
    • Suggest to use CPFP with package relay to address RBF-related free option problem 🔗
    • CoreDev.tech transcript of discussion about package relay and v3 transactions 🔗
  • Block explorers
    • Idea to use transaction lookup servers to serve unused wallet addresses 🔗
    • Launch of block explorer with private information retrieval capability 🔗
  • Ephemeral anchors
    • Proposed additional rules for v3 transaction relay to assist CPFP fee bumping 🔗
    • Ephemeral anchors 🔗
  • Erlay
    • BIPs #1370 updates the BIP330 specification of Erlay 🔗
    • Bitcoin Core #23443 adds the sendtxrcncl negotiation message for Erlay 🔗
  • Transaction pinning
    • Proposed relay of v3 transactions designed to avoid pinning attacks 🔗
    • Proposed ephemeral anchors to help mitigate pinning attacks 🔗
  • Version 2 P2P transport
    • Update on BIP324 v2 encrypted transport protocol 🔗
    • CoreDev.tech discussion of v2 P2P encrypted transport proposal 🔗
  • Version 3 transaction relay
    • Proposed new transaction relay policies designed for LN-penalty 🔗
    • Ephemeral anchors proposal built on v3 transaction relay proposal 🔗
  • Addr v2
    • BTCD v0.23.2 adds support for addr v2 🔗
  • Anchor outputs
    • Proposed relay of v3 transactions attempts to improve on anchor outputs 🔗
  • Async payments
    • Eclair #2435 adds support for a basic form of async payments when trampoline relay is used 🔗
  • Compact block filters
    • Bitcoin Core #23549 adds scanblocks RPC to scan local compact block filters 🔗
  • Countersign
    • CoreDev.tech transcripts: v2 P2P encrypted transport and countersign 🔗
  • Child pays for parent (CPFP)
    • Suggestion to use CPFP to address RBF-related free option problem 🔗
  • CVEs (various)
    • CVE-2017-12842: discussion of lowering minimum relayable transaction size 🔗
  • Dual funding
    • Eclair #2463 and #2461 increase robustness of RBF fee bumping interactive funding 🔗
  • Fee sniping
    • CoreDev.tech transcript of discussion about fees and fee sniping 🔗
  • Fee sponsorship
    • Proposed ephemeral anchors relay policy to implement sponsorship-like behavior 🔗
  • MuSig
    • Disclosure of security vulnerability in MuSig2 as described in a draft BIP 🔗
  • Output linking
    • Recommendations for unique address servers 🔗
  • Pooled mining
    • Transcript of developer discussion about Stratum v2 and Braidpool 🔗
  • Partially signed bitcoin transactions
    • BIPs #1293 adds BIP372 for including Pay-to-contract tweak fields in a PSBT 🔗
  • Sidechains
    • Validity rollups research showing how trustless sidechains may be possible 🔗
  • SIGHASH_ANYPREVOUT
    • BIPs #1367 simplifies BIP118’s description of SIGHASH_ANYPREVOUT 🔗
  • Silent payments
    • BIPs #1349 adds BIP351 for a payment protocol inspired by silent payments 🔗
  • Soft fork activation
    • History of how various soft fork proposals were tested prior to activation 🔗
  • Tapscript
    • Discussion about lowering tapscript resource limits 🔗
  • Threshold signature
    • Transcripts of talks about the FROST and ROAST threshold signature schemes 🔗
  • Trampoline payments
    • Eclair #2435 adds support for basic async payments for trampoline relay 🔗
  • Uneconomical outputs
    • Discussion about allowing uneconomical outputs that are part of a transaction package 🔗
  • Utreexo
    • Launch of ZeroSync project using Utreexo 🔗

September 2022

August 2022

July 2022

June 2022

May 2022

  • Covenants
    • When would enabling OP_CAT allow recursive covenants? 🔗
    • Updated OP_TX opcode useful for constructing covenants 🔗
    • Discussion about Miner Extractable Value (MEV) risk from recursive covenants 🔗
  • MuSig
    • MuSig2 implementation notes 🔗
    • LND #6361 adds support for MuSig2 signing 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Proposal to initially restrict OP_TX to the features provided by OP_CTV 🔗
    • BIPs #1309 updates BIP119’s example implementation to use pythonic pseudocode 🔗
  • Coin selection
    • What is the coin selection ‘waste metric’? 🔗
  • Compact block relay
    • Bitcoin Core #20799 disables v1 compact block relay; v2 still enabled 🔗
  • Child pays for parent (CPFP)
    • BIP proposed for package relay that can make CPFP bumping more reliable 🔗
  • Eltoo
    • Using transaction introspection to prevent pinning in eltoo channels 🔗
  • Large channels
    • LDK #1425 adds support for large channels 🔗
  • Miniscript
    • Adapting descriptors and miniscript for hardware signing devices 🔗
  • Minisketch
    • Research into interaction between LN rate limiting and minisketch gossiping 🔗
  • OP_CAT
    • Examination of the minimal set of features added to OP_CAT that would create recursive covenants 🔗
  • Output script descriptors
    • Adapting descriptors and miniscript for hardware signing devices 🔗
  • Package relay
    • BIP proposed for package relay 🔗
  • Partially signed bitcoin transactions
    • LND #6450 adds support for signing PSBTs that spend taproot outputs 🔗
  • Responsible disclosures
    • Bastien Teinturier disclosed issue allowing funds loss from Core Lightning and LND 🔗
  • Schnorr signatures
    • Why isn’t OP_CHECKMULTISIG compatible with batch verification of schnorr signatures? 🔗
  • Soft fork activation
    • Proposal to use transaction signaling to measure support for consensus changes 🔗
  • Taproot
    • LND #6450 adds support for signing PSBTs that spend taproot outputs 🔗
  • Testnet
    • Bitcoin Core #18554 prevents the same wallet from being used on mainnet and testnet 🔗
  • Transaction pinning
    • Idea to use transaction introspection to prevent RBF pinning 🔗

April 2022

March 2022

February 2022

January 2022

  • Partially signed bitcoin transactions
    • Bitcoin Core #23718 adds support for displaying hashes and preimages contained in PSBTs 🔗
    • Bitcoin Core #17034 adds support for version 2 PSBTs and for preserving proprietary fields 🔗
    • Rust Bitcoin #681 adds support for BIP371’s additional PSBT fields for taproot 🔗
    • Rust Bitcoin #669 improves partial signature support with discussion about nulldummy vectors 🔗
    • BIPs #1270 updates the PSBT specification to discourage signature placeholders 🔗
  • Onion messages
    • Eclair #2099 adds onion message configuration option for controling when to relay messages 🔗
    • Eclair #2117 adds onion message replies in preparation for supporting offers 🔗
    • Eclair #2133 begins relaying onion messages by default 🔗
  • Stateless invoices
    • Rust-Lightning #1177 implements stateless payments using the payment secret field 🔗
    • BOLTs #912 adds a new optional field to BOLT11 invoices to enable stateless payments 🔗
    • Eclair #2063 adds support for the new option_payment_metadata invoice field 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Bi-weekly IRC meetings scheduled for reviewing and discussing OP_CHECKTEMPLATEVERIFY 🔗
    • Mailing list and IRC discussion of CTV, including criticism and rebuttals 🔗
  • Anchor outputs
    • Eclair #2134 enables anchor outputs by default 🔗
  • Bech32(m)
    • Bitcoin Core GUI #459 allows users to choose to create bech32m addresses 🔗
  • Compact block filters
    • Bitcoin Core #17631 adds new REST endpoint for compact block filters 🔗
  • Duplicate transactions
    • Description of Block 1,983,702 Problem added to testnet documentation 🔗
  • Erlay
    • PR Review Club: #23443 implementing Erlay support signaling 🔗
  • Fee estimation
    • ECDSA signature grinding helps with fee estimation 🔗
  • Fee sponsorship
    • Fee accounts, an outgrowth from fee sponsorship 🔗
  • LNURL
    • BTCPay Server #3083 allows administrators to log in using LNURL authentication 🔗
  • Offers
    • Eclair #2117 adds onion message replies in preparation for supporting offers 🔗
  • Output script descriptors
    • HWI #545 adds support for taproot tr() descriptors 🔗
  • Package relay
    • Bitcoin Core #22674 adds logic for validating packages of transactions against relay policy 🔗
  • Pay-to-Contract (P2C) protocols
    • PSBT extension for pay-to-contract fields 🔗
  • Payment secrets
    • Rust-Lightning #1177 uses the payment secret field to store encrypted invoice information 🔗
  • Replace-by-fee (RBF)
    • Proposal to briefly allow full RBF before using default opt-in RBF 🔗
  • Taproot
    • Question: is it possible to convert a taproot address into a v0 native segwit address? 🔗
  • Testnet
    • Bitcoin Core #23882 updates documentation about testnet3 to mention the BIP30 problem 🔗

December 2021

November 2021

October 2021

  • Uneconomical outputs
    • Multiple implementations of BOLTs #894 which allow using a lower commitment tx dust limit 🔗
    • Multiple implementations of LN vulnerable to uneconomical spending CVEs 🔗
    • Bitcoin Core #22863 documents P2TR dust amount 🔗
    • BOLTs #894 specifies various checks related to uneconomical payments in LN 🔗
  • Bech32(m)
    • Rust Bitcoin #563 adds support for bech32m addresses for P2TR outputs 🔗
    • Instructions for creating bech32m addresses in Bitcoin Core 🔗
  • Eltoo
    • Inherited identifiers proposal with an alternative channel commiment mechanism to eltoo 🔗
    • LN PTLC proposal providing some of the same benefits of eltoo without a soft fork 🔗
  • Output linking
    • Preparing for taproot: impact of a new output script on output linkability 🔗
    • Bitcoin Core #23065 allows the wallet to persistently prevent spending of spam UTXOs 🔗
  • Output script descriptors
    • Coldcard 4.1.3 adds support for descriptor-based wallets 🔗
    • Bitcoin Core #23002 makes descriptor-based wallets the default for new wallets 🔗
  • Point Time Locked Contracts (PTLCs)
    • Proposal to upgrade LN to use PTLCs 🔗
    • Using PTLCs for non-custodial offline receiving 🔗
  • Taproot
    • Preparing for taproot: is cooperation always an option? 🔗
    • Taproot trivia: origins, naming, and related prior work 🔗
  • Async payments
    • Paying offline nodes 🔗
  • Channel factories
    • Inherited identifiers proposal with an alternative channel factory design 🔗
  • Channel jamming attacks
    • Making jamming attacks more expensive by lowering the cost of probing 🔗
  • Coin selection
    • Bitcoin Core #17526 adds Single Random Draw coin selection algorithm 🔗
  • Coinjoin
    • Sparrow 1.5.0 adds coinjoin suport 🔗
  • Fee estimation
    • Bitcoin Core #22539 includes replacement transactions seen by the local node in fee estimates 🔗
  • Joinpools
    • Post-taproot soft fork ideas: OP_TAPLEAF_UPDATE_VERIFY 🔗
  • Pay-to-Contract (P2C) protocols
    • Taproot history: pay to contract protocol 🔗
  • Payment probes
    • Lowering the cost of probing to make attacks more expensive 🔗
  • Partially signed bitcoin transactions
    • LND #5363 allows PSBTs to be finalized by external software 🔗
  • SIGHASH_ANYPREVOUT
    • Inherited identifiers proposal as an alternative to SIGHASH_ANYPREVOUT 🔗
  • Tapscript
    • Rust Bitcoin #644 adds support for tapscript’s new opcodes 🔗
  • Testnet
    • Instructions for creating taproot transactions on testnet 🔗
  • Vaults
    • Should vaults always have a cooperative taproot keypath spend? 🔗
  • Watchtowers
    • Inherited identifiers proposal with alternative simplified watchtower design 🔗

September 2021

August 2021

July 2021

  • Output script descriptors
    • Seven BIPs proposed for standardized output script descriptors 🔗
    • Preparing for taproot: output script descriptors 🔗
    • Bitcoin Core #19651 adds support for updating descriptors via importdescriptor 🔗
    • Output script descriptors versus versioned and unversioned BIP32 seeds 🔗
  • Bech32(m)
    • Wiki page for tracking wallet & service support of bech32m 🔗
    • Sparrow wallet adds support for bech32m addresses 🔗
  • Taproot
    • BIPs #1137 adds BIP86 with a key derivation scheme for single key P2TR outputs 🔗
    • Sparrow wallet adds support for P2TR keypath spends on regtest and signet 🔗
  • Addr v2
    • BIPs #1134 clarifies BIP155 usage of `sendaddr2’ P2P feature negotiation message 🔗
  • Anonymity networks
    • Bitcoin Core #22112 changes the assumed port for I2P addresses to be 0 instead of 8333 🔗
  • Block explorers
    • BTCPay Server #2655 improves privacy by not sending HTTP referer field to explorers 🔗
  • Discreet Log Contracts (DLCs)
    • Alpha release of Suredbits’s DLC wallet 🔗
  • Dual funding
    • C-Lightning #4639 adds experimental support for liquidity advertisments based on dual funding 🔗
  • HD key generation
    • No changes to BIP32 derivation needed to implement taproot receiving support 🔗
  • Liquidity advertisements
    • C-Lightning #4639 adds experimental support for liquidity advertisements 🔗
  • LNURL
    • Stacker News launched with LNURL authentication 🔗
  • Offers
    • Offers specification updated to no longer require a signature 🔗
  • OP_CAT
    • Discussion about OP_CHECKSIGFROMSTACK branches off into discussion about OP_CAT 🔗
  • OP_CHECKSIGFROMSTACK
    • Call for OP_CHECKSIGFROMSTACK design suggestions 🔗
  • Payment secrets
    • C-Lightning #4646 makes payment secrets required 🔗
  • Partially signed bitcoin transactions
    • BIPs #1139 adds BIP371 specifying new fields for using PSBTs with P2TR spends 🔗
  • Reproducible builds
    • Question: what’s the purpose of Guix within Gitian? 🔗
  • Schnorr signatures
    • Libsecp256k1 #844 updates schnorr API to allow signing arbitrary length messages 🔗
  • SIGHASH_ANYPREVOUT
    • BIPs #943 updates BIP118 to be named SIGHASH_ANYPREVOUT rather than SIGHASH_NOINPUT 🔗
  • Unannounced channels
    • C-Lightning #4611 updates the keysend RPC to support unannounced channels 🔗
  • Wallet labels
    • Bitcoin Core #19651 allows the wallet key manager to edit labels among other data 🔗
  • Zero-conf channels
    • Discussion about standardizing zero-conf channel opens 🔗

June 2021

  • Taproot
    • Bitcoin Core #22051 adds support for importing descriptors for taproot outputs 🔗
    • Taproot locked in; activation to occur at block 709,632 🔗
    • Bitcoin Core #21365 allows the wallet to create signatures for P2TR spends 🔗
    • Proposed BIP to standardize a wallet path for single-sig P2TR addresses 🔗
  • Bech32(m)
    • C-Lightning 🔗
    • Preparing for taproot #1: bech32m sending support 🔗
    • Rust Bitcoin #601 adds support for parsing bech32m addresses 🔗
  • Atomic multipath payments (AMPs)
    • LND #5336 adds the ability for users to reuse AMP invoices non-interactively 🔗
    • LND 0.13.0-beta allows receiving and sending payments using AMP 🔗
  • HD key generation
    • Bitcoin Core #22095 adds test to ensure BIP32 derived keys are correctly padded 🔗
    • Proposed BIP32 key derivation path for single-sig P2TR 🔗
  • Replace-by-fee (RBF)
    • Proposal to allow any mempool transaction to be replaced by default 🔗
    • Trezor wallet software defaults to enabling BIP125 RBF 🔗
  • Adaptor signatures
    • Question: Why does blockwide signature aggregation prevent adaptor signatures? 🔗
  • Anchor outputs
    • LND 0.13.0-beta begins using anchor outputs by default for all new channels 🔗
  • Anonymity networks
    • Bitcoin Core #22050 drops support for deprecated version 2 Tor onion services 🔗
  • Channel commitment upgrades
    • C-Lightning #4532 adds experimental support for upgrading a channel 🔗
  • Coinjoin
    • Candidate set based block templates may help fee bumping large coinjoins 🔗
  • Child pays for parent (CPFP)
    • Candidate set block templates may make some CPFP fee bumps more effective 🔗
  • Cross-input signature aggregation (CISA)
    • Question: why does signature aggregation interefer with signature adaptors? 🔗
  • Fee sniping
    • BIP proposed for wallets to set nSequence by default on taproot transactions 🔗
  • Hardware wallet interface (HWI)
    • Bitcoin Core GUI #4 adds initial support for using HWI external signers via the GUI 🔗
  • Large channels
    • BOLTs #877 removes the protocol-level per-payment amount limit 🔗
  • LNURL
    • Phoenix v1.4.12 adds support for the LNURL-pay protocol 🔗
  • MuSig
    • Benchmark: 1 million signers with MuSig 🔗
  • Output script descriptors
    • Bitcoin Core #22051 adds support for importing descriptors for taproot outputs 🔗
  • Package relay
    • Bitcoin Core #20833 allows testmempoolaccept to evaluate descendant transaction chains 🔗
  • Payjoin
    • BTCPay Server #2450 makes generating payjoin-compatible invoices the default for new hot wallets 🔗
  • Payment batching
    • Candidate set based block templates may help fee bumping batched payments 🔗
  • Payment secrets
    • LND #5336 allows non-interactive reuse of AMP invoices by changing the payment secret 🔗
  • Partially signed bitcoin transactions
    • PSBT extensions for taproot 🔗
  • Signet
    • LND #5025 adds basic support for using signet 🔗
  • Tapscript
    • Bitcoin Core #21365 allows the wallet to create signatures for tapscript spends 🔗

May 2021

  • Taproot
    • Miners encouraged to start signaling readiness for taproot 🔗
    • Bitcoin Core 0.21.1 released ready to activate taproot 🔗
    • BIPs #1104 adds activation parameters to the BIP341 taproot specification 🔗
    • Rust Bitcoin #589 starts implementing support for taproot and schnorr signatures 🔗
  • HD key generation
    • Closing lost LN channels with only a BIP32 seed 🔗
    • BIPs #1089 assigns BIP87 to proposal for standardized BIP32 paths for multisig wallets 🔗
    • BIPs #1097 assigns BIP129 to proposal for exchange of xpubs during multisig wallet set up 🔗
  • Soft fork activation
    • Miners encouraged to start signaling readiness for taproot 🔗
    • Bitcoin Core 0.21.1 released ready to activate taproot 🔗
    • BIPs #1104 adds activation parameters to the BIP341 taproot specification 🔗
  • Atomic multipath payments (AMPs)
    • LND #5159 adds support for making spontaneous AMPs 🔗
    • LND #5253 adds support for Atomic Multipath Payment (AMP) invoices 🔗
  • Bech32(m)
    • Blockchain.com adds support for bech32 receiving and spending 🔗
    • Electrum 4.1.0 adds support for bech32m 🔗
  • Child pays for parent (CPFP)
    • Bitcoin Core #21359 allows CPFP fee bumping incoming payments 🔗
    • Sparrow 1.4.0 adds support for CPFP fee bumping from transaction list 🔗
  • Output script descriptors
    • Bitcoin Core #20867 increases the maximum multisig keys for descriptors to 20 🔗
    • BIPs #1089 assigns BIP87 to a multisig wallet standard using descriptors 🔗
  • Payment secrets
    • Rust-Lightning #893 requires payment secrets to prevent multipath probing 🔗
    • Eclair #1810 makes it mandatory for peers to signal and comply with the payment_secret feature 🔗
  • Partially signed bitcoin transactions
    • LND #5291 improves the way it ensures PSBTs use segwit inputs 🔗
    • BlueWallet v6.1.0 adds support for using PSBTs with watch-only wallets 🔗
  • Replace-by-fee (RBF)
    • CVE-2021-31876 discrepancy between BIP125 and Bitcoin Core implementation 🔗
    • Continued discussion about CVE-2021-31876’s impact on protocols using RBF 🔗
  • Anchor outputs
    • LND #5274 limits the maximum funds reserved for fee bumping anchor outputs 🔗
  • AssumeUTXO
    • Bitcoin Core #19521 simplifies generating UTXO set hashes for old blocks 🔗
  • CVEs (various)
    • CVE-2021-31876: discrepancy between BIP125 and Bitcoin Core implementation 🔗
  • Dual funding
    • C-Lightning #4489 adds plugin for configuring dual-funding behavior 🔗
  • Gap limits
    • BIPs #1025 assigns BIP88 to the standardized format for BIP32 path templates 🔗
  • Multipath payments
    • Electrum 4.1.0 adds support for multipath payments 🔗
  • Peer storage
    • Restoring LN channels from only a BIP32 seed 🔗
  • Reproducible builds
    • Bitcoin Core #21462 adds tooling for attesting to Guix-based builds 🔗
  • Responsible disclosures
    • Antoine Riard disclosed CVE-2021-31876 enhanced pinning against LN due to BIP125 discrepancy 🔗
  • Schnorr signatures
    • Rust Bitcoin #589 starts implementing support for taproot and schnorr signatures 🔗
  • Segregated witness
    • Bitcoin Core #21009 removes logic needed to upgrade a pre-segwit node to segwit 🔗
  • Static channel backups
    • Closing lost channels with only a BIP32 seed and option_data_loss_protect 🔗
  • Trampoline payments
    • Electrum 4.1.0 adds support for trampoline payments 🔗
  • Transaction pinning
    • CVE-2021-31876 reduces expected cost of some pinning attacks 🔗

April 2021

  • Soft fork activation
    • Compromise proposed to use MTP to activate taproot with speedy trial 🔗
    • PR Review Club discussion about burying past soft fork deployments 🔗
    • Bitcoin Core #21377 and #21686 add taproot activation mechanism and params 🔗
  • Anonymity networks
    • Bitcoin Core #21594 adds a network type field to the getnodeaddresses RPC 🔗
    • Bitcoin Core #20197 updates eviction logic to keep long-running onion peers 🔗
  • Dual funding
    • C-Lightning 0.10.0 includes experimental support for dual funding 🔗
    • Dual funding’s interactive construction used in splicing proposal 🔗
  • Taproot
    • Compromise proposed to use MTP to activate taproot with speedy trial 🔗
    • Bitcoin Core #21377 and #21686 add taproot activation mechanism and params 🔗
  • Adaptor signatures
    • Libsecp256k1-zkp #117 adds support for simplified ECDSA signature adaptors 🔗
  • Anchor outputs
    • Request for feedback on using anchor outputs by default in LND 🔗
  • ASICBoost
    • Question about block templates versus actual blocks: ASICBoost explains one difference 🔗
  • Atomic multipath payments (AMPs)
    • LND #5108 adds support for spontaneous multipath payments using AMP 🔗
  • Child pays for parent (CPFP)
    • Challenges of using CPFP fee bumps for LN commitment transactions 🔗
  • Fee sponsorship
    • Call for topics in layer-crossing workshop, including fee sponsorship 🔗
  • Miniscript
    • Specter-DIY v1.5.0 adds support for miniscript 🔗
  • Scriptless multisignatures
    • Signature adaptors without requiring support for multisignatures 🔗
  • Offers
    • Offers specification updated to partly address stuck payments 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Public launch of Sapio with support for using OP_CHECKTEMPLATEVERIFY 🔗
  • Output script descriptors
    • Specter-DIY v1.5.0 adds full descriptor support 🔗
  • Package relay
    • Upcoming relay policy workshop to discuss package relay and other topics 🔗
  • Pay-to-Contract (P2C) protocols
    • Question: Can Taproot commit arbitrary data to chain without any additional footprint? 🔗
  • Payjoin
    • BTCPay Server #2425 allows receiving payjoin payments without an inovice 🔗
  • Proof of payment
    • Using LN offers and proof of payment to partly address stuck payments 🔗
  • Replace-by-fee (RBF)
    • Upcoming relay policy workshop to discuss RBF and other topics 🔗
  • Side channels
    • Libsecp256k1 #906 reduces iterations when using a constant-time signing algorithm 🔗
  • Signet
    • Discussion about multiple signet compatibilty with soft fork activation 🔗
  • Splicing
    • Draft specification for LN splicing based on interactive funding protocol 🔗
  • Spontaneous payments
    • LND #5108 adds support for spontaneous multipath payments using AMP 🔗
  • Timelocks
    • Challenges related to timelocks when using CPFP fee bumping in LN 🔗

March 2021

February 2021

  • Soft fork activation
    • Taproot activation meeting summary and follow-up meeting schedule 🔗
    • BIPs #1021 eases BIP8 LockinOnTimeout=True signaling requirements 🔗
    • BIPs #1020 updates BIP8 to no longer require signaling during lockin period 🔗
    • Summary of second taproot activation meeting and mailing list discussion 🔗
  • Compact block filters
    • New Rust-Language light client released using compact block filters 🔗
    • Question about high bandwidth requirements for serving BIP157 filters 🔗
    • Bitcoin Core #15946 allows retaining filters on a pruned node 🔗
  • Output script descriptors
    • Bitcoin Core #20226 adds new listdescriptors RPC for its wallet 🔗
    • Bitcoin Dev Kit v0.2.0 released with descriptor support 🔗
    • Bitcoin Core #19136 extends getaddressinfo to return parent descriptors 🔗
  • Compact block relay
    • Bitcoin Core PR Review Club about dropping support for v1 compact blocks 🔗
    • Bitcoin Core #20764 adds BIP152 high bandwidth indicator to bitcoin-cli 🔗
  • Partially signed bitcoin transactions
    • BIPs #988 updates BIP174 to require output fields be initialized 🔗
    • BIPs #1055 updatse BIP174 with new versioning information 🔗
  • Taproot
    • Summary of taproot activation discussion & additional meeting scheduled 🔗
    • Summary of taproot activation discussion regarding BIP8 LOT parameter 🔗
  • Bech32(m)
    • BIPs #1056 adds BIP350 for bech32m 🔗
  • Channel jamming attacks
    • Renewed discussion about bidirectional upfront LN fees 🔗
  • Covenants
    • Replicating the OP_CSFS covenant-enabling opcode with OP_CAT and schnorr signatures 🔗
  • Discreet Log Contracts (DLCs)
    • New mailing list for discussion of DLC protocol development 🔗
  • Exfiltration resistant signing
    • Description of anti-exfiltration technique being used in BitBox02 and Jade hardware wallets 🔗
  • Generic signmessage
    • BIPs #1048 rewrites BIP322 to simplify implementation 🔗
  • HD key generation
    • Proposal for secure exchange of BIP32 xpubs during multisig wallet set up 🔗
  • OP_CAT
    • Replicating OP_CHECKSIGFROMSTACK with schnorr signatures and OP_CAT 🔗
  • OP_CHECKSIGFROMSTACK
    • Replicating OP_CHECKSIGFROMSTACK with schnorr signatures and OP_CAT 🔗
  • Point Time Locked Contracts (PTLCs)
    • Technique for implementing logical OR on LN using PTLCs 🔗
  • Schnorr signatures
    • Comparison of SSS to OP_CHECKMULTISIG to schnorr multisignatures 🔗
  • Side channels
    • New SafeGCD algorithm can speed up signing while remaining side-channel resistant 🔗
  • SIGHASH_ANYPREVOUT
    • Using schnorr signatures plus OP_CAT to simulate SIGHASH_ANYPREVOUT 🔗
  • Vaults
    • Using schnorr signatures plus OP_CAT to create vaults 🔗

January 2021

  • Output script descriptors
    • Bitcoin Core 0.21.0 released with experimental native descriptor wallets 🔗
    • BTCPay Server #2169 adds functions for importing some descriptors 🔗
    • BTCPay Server 1.0.6.7 released with support for descriptors in wallet setup 🔗
  • Addr v2
    • Bitcoin Core 0.21.0 released with version 2 addr support 🔗
    • Rust Bitcoin 0.26.0 released with version 2 addr support 🔗
  • Anchor outputs
    • LND 0.12.0-beta adds watchtower support for channels using anchor outputs 🔗
    • LND #4908 reserves a balance for fee bumping when using anchor outputs 🔗
  • Anonymity networks
    • Bitcoin Core GUI #162 adds network type information to the GUI Peers window 🔗
    • Bitcoin Core 0.21.0 released with support for Tor v3 onion addresses 🔗
  • Compact block filters
    • Bitcoin Core 0.21.0 released with support for serving compact block filters 🔗
    • Question: how do clients using BIP157 receive unconfirmed transactions? 🔗
  • Payjoin
    • Discussion about how to increase payjoin adoption 🔗
    • Coldcard hardware wallet adds support for paying payjoin 🔗
  • Signet
    • Bitcoin Core 0.21.0 released with support for signets 🔗
    • Bitcoin Core #19937 adds utilities for mining signet blocks 🔗
  • AssumeUTXO
    • MuHash function added in preparation for tracking UTXO state hashes 🔗
  • Bech32(m)
    • Draft BIP for bech32m 🔗
  • Dual funding
    • Preventing UTXO probing in dual funded channels; PoDLE tradeoffs 🔗
  • Eclipse attacks
    • Proposed disabletx message to help allow more block-relay-only peers 🔗
  • Generic signmessage
    • Proposed rewrite of BIP322 to simplify implementation 🔗
  • Offers
    • C-Lightning 0.9.3 released with experimental offers support 🔗
  • Payment probes
    • Preventing UTXO probing in dual funded channels 🔗
  • Partially signed bitcoin transactions
    • LND 0.12.0-beta adds a new psbt wallet subcommand for PSBTs 🔗
  • Replace-by-fee (RBF)
    • Question: would first-seen-safe prevent confirmed RBF double spends? 🔗
  • Reproducible builds
    • Bitcoin Core #17920 adds Guix support for macOS builds 🔗
  • Soft fork activation
    • Meeting scheduled to discuss taproot activation 🔗
  • Taproot
    • Meeting to discuss taproot activation mechanisms 🔗
  • Vaults
    • Making hardware wallets compatible with advanced features, like vaults 🔗

December 2020

November 2020

  • CVEs (various)
    • CVE-2020-26896: BOLTs #808 adds warning about improper preimage revelation 🔗
    • CVE-2020-26895: BOLTs #807 adds warning about non-standard signatures 🔗
  • Output script descriptors
    • C-Lightning #4171 allows retrieving the wallet’s onchain descriptors 🔗
    • Q&A about migration from legacy wallets to descriptor wallets 🔗
  • Soft fork activation
    • Survey released with developer preferences for soft fork activations 🔗
    • Website listing miner support for taproot activation 🔗
  • Taproot
    • Summary of results from surveying developers about taproot activation 🔗
    • Website tracking miner support for taproot before signaling begins 🔗
  • AssumeUTXO
    • Review Club summary of MuHash implementation for quickly hashing UTXO set 🔗
  • Channel jamming attacks
    • Bi-directional upfront fees to mitigate jamming attacks 🔗
  • Eclipse attacks
    • Eclair #1545 adds multiple header sources to make eclipse attacks harder 🔗
  • Hold invoices
    • Discussion about bi-directional fees to allow charging for hold invoices 🔗
  • Multipath payments
    • Eclair #1599 improves multipath spending to direct channel counterparties 🔗
  • Payjoin
    • Sparrow Wallet 0.9.7 adds support for BIP78 payjoin 🔗
  • Payment batching
    • Sparrow wallet adds support for payment batching 🔗
  • Signet
    • Bitcoin Core #20145 adds script for requesting signet coins 🔗

October 2020

  • Channel jamming attacks
    • Eclair #1539 implements a simple measure to reduce channel jamming attacks 🔗
    • Incremental routing as an alternative to upfront fees 🔗
    • Trusted upfront fees to mitigate jamming attacks 🔗
    • More upfront fees discussion 🔗
  • Anonymity networks
    • Bitcoin Core #19954 completes the BIP155 addr v2 implementation 🔗
    • Bitcoin Core #19991 enables tracking inbound connections from onion peers 🔗
  • CVEs (various)
    • CVE-2020-26895: full disclosure of on-standard signature acceptance 🔗
    • CVE-2020-26896: full disclosure of improper preimage revelation 🔗
  • Generic signmessage
    • Alternative proposal for generic signmessage using virtual transactions 🔗
    • BIP322 updated to use virtual transactions 🔗
  • Responsible disclosures
    • Antoine Riard disclosed CVE-2020-26895 and CVE-2020-26896 allowing funds theft from LND 🔗
    • Practicalswift responsibly disclosed a netsplit vulnerability in Bitcoin Core 🔗
  • Soft fork activation
    • Changes ‘unexpected version’ warnings implemented as part of BIP8 🔗
    • Bitcoin Core #19953 adds taproot code; activation still under discussion 🔗
  • Adaptor signatures
    • Revised witness asymmetric channels proposal with signature adaptors 🔗
  • Addr v2
    • Bitcoin Core #19954 implements BIP155 and Tor v3 support 🔗
  • Anchor outputs
    • Eclair 0.4.2 adds experimental support for anchor outputs 🔗
  • Bech32(m)
    • Discussion about updates to BIP173 bech32 to address mutability concerns 🔗
  • Hash Time Locked Contract (HTLC)
    • CVE-2020-26896: premature preimage revelation in LND 🔗
  • MAST
    • What are Merklized Alternative Script Trees? 🔗
  • MuSig
    • MuSig2 paper published 🔗
  • Payjoin
    • BlueWallet 5.6.1 adds support for BIP78 payjoin 🔗
  • Payment probes
    • Upfront fees discussion and its ability to make probing more expensive 🔗
  • Payment secrets
    • CVE-2020-26896 could have been prevented by payment secrets 🔗
  • Proof of payment
    • CVE-2020-26896 improper preimage revelation gives proof of payment for stolen payments 🔗
  • Proof of reserves
    • BIP322 generic signmessage updated to use virtual transactions that support basic proof of reserves 🔗
  • Partially signed bitcoin transactions
    • LND #4389 adds a new psbt wallet subcommand for creating & signing PSBTs 🔗
  • Point Time Locked Contracts (PTLCs)
    • Updated witness asymmetric channels proposal for move from HTLCs to PTLCs 🔗
  • Schnorr signatures
    • Bitcoin Core #19953 merged with consensus implementation of BIP340 🔗
  • Signet
    • Summary of Bitcoin Core PR Review Meeting on adding signet support 🔗
  • Spontaneous payments
    • Eclair 0.4.2 adds support for keysend-style spontaneous payments 🔗
  • Taproot
    • Bitcoin Core #19953 merged with consensus implementation of BIP341 🔗
  • Tapscript
    • Bitcoin Core #19953 merged with consensus implementation of BIP342 🔗
  • Testnet
    • Bitcoin PR review club on signet with questions and answers about testnet 🔗

September 2020

  • Anchor outputs
    • LND #4558 updates LND to the latest anchor outputs specification 🔗
    • Vulnerability disclosed against experimenal anchor outputs proposal 🔗
    • LND #4606 & #4592 improve LND’s effectiveness at fee bumping anchor outputs 🔗
    • Why do anchor outputs need to enforce an nSequence of 1? 🔗
    • Eclair #1501 adds support for unilateral closes of channels using anchors 🔗
    • LND #4576 starts adding support for anchor outputs to LND’s watchtower 🔗
  • Signet
    • Discussion about the parameters for a default signet 🔗
    • Discussion about the design decisions for signet 🔗
    • BIPs #983 updates BIP325 to omit signet commitments when unnecessary 🔗
    • Bitcoin Core #18267 and #19993 add support for signet 🔗
    • C-Lightning #4068 and #4078 update C-Lightning’s signet implementation 🔗
  • Payment batching
    • C-Lightning #3812 adds batching support to its onchain wallet 🔗
    • C-Lightning #3763 adds new RPC to batch open channels 🔗
    • Bitcoin Core #16378 adds a new RPC to the wallet with batching support 🔗
  • Eclipse attacks
    • Bitcoin Core #19670 reserves inbound slots for block-relay-only peers 🔗
    • CVE-2018-17145 InvDoS attack could’ve been used to eclipse nodes 🔗
  • Hash Time Locked Contract (HTLC)
    • LND #4527 allows users to limit the maximum number of pending HTLCs 🔗
    • Stealing fees included in HTLCs created using SIGHASH_SINGLE 🔗
  • Schnorr signatures
    • BIPs #982 updates BIP340 to consistently use evenness tiebreaker 🔗
    • Libsecp256k1 #558 implements schnorr signature verification and signing 🔗
  • Timelocks
    • One-block relative timelocks to prevent pinning issues in coinswaps 🔗
    • Research into conflicts between timelocks and heightlocks 🔗
  • Transaction pinning
    • Pinning attacks against a coinswap protocol 🔗
    • Transaction fee sponsorship proposal to attempt to eliminate pinning 🔗
  • Adaptor signatures
    • Using signature adaptors for witness asymmetric payment channels 🔗
  • Addr v2
    • BIPs #907 updates BIP155 messages to allow addresses up to 512 bytes 🔗
  • Coinswap
    • Continued coinswap discussion focused on potential weaknesses 🔗
  • CVEs (various)
    • CVE-2018-17145: full disclosure of inv out-of-memory DoS attack 🔗
  • Dual funding
    • C-Lightning #3973 adds the accepter side of dual-funded channels 🔗
  • Fee sponsorship
    • Transaction fee sponsorship proposal 🔗
  • Hardware wallet interface (HWI)
    • HWI #363 adds support for Bitbox02 hardware wallet 🔗
  • Large channels
    • LND #4567 adds a new --maxchansize parameter for large channels 🔗
  • Miniscript
    • Miniscript to warn or fail for safety when mixed time/height locks used 🔗
  • Payjoin
    • Joinmarket 0.7.0 adds support for BIP78 payjoin 🔗
  • Partially signed bitcoin transactions
    • Joinmarket 0.7.0 adds support for PSBTs 🔗
  • Point Time Locked Contracts (PTLCs)
    • Using witness asymmetric payment channels for move from HTLCs to PTLCs 🔗
  • Replace-by-fee (RBF)
    • C-Lightning #3870 implements RBF scorched earth for penalty transactions 🔗
  • Responsible disclosures
    • Braydon Fuller and Javed Khan report CVE-2018-17145 DoS vulnerability to devs of full nodes 🔗
  • Soft fork activation
    • Conversation about segwit activation history and ideas for taproot 🔗
  • Statechains
    • Transcript of discussion about multiple topics, including statechains 🔗
  • Taproot
    • Discussion about taproot activation parameters 🔗
  • Testnet
    • C-Lightning #3763 adds a new RPC used to open a channel to every public testnet LN node 🔗

August 2020

  • Anchor outputs
    • Discussion of solutions for attacks against LN, including anchor outputs 🔗
    • Eclair #1491 adds support for anchor outputs 🔗
    • C-Lightning #3830 adds experimental support for anchor outputs 🔗
    • BOLTs #688 adds support for anchor outputs to the LN protocol 🔗
  • Partially signed bitcoin transactions
    • BIP174 specification of PSBT updated in response to fee overpayment attack 🔗
    • Bitcoin Core #18654 adds new RPC specifically for RBF fee bumping PSBTs 🔗
    • BIPs #955 updates BIP174 PSBT to standardize supplying hash preimages 🔗
  • CLTV expiry delta
    • LND #4488 updates the minimum CLTV expiry delta users may set to 18 blocks 🔗
    • BOLTS #785 updates the minimum CLTV expiry delta to 18 blocks 🔗
  • Miniscript
    • Minsc: a new spending policy language based on miniscript 🔗
    • PSBT specification updated to improve miniscript compatibility 🔗
  • Package relay
    • Discussion of solutions for attacks against LN, including package relay 🔗
    • Change to orphan parent fetching, may be replaced by package relay 🔗
  • Payment batching
    • Specter Desktop adds payment batching support 🔗
    • Field Report: How batching could have saved millions of dollars in fees 🔗
  • Signet
    • BIP325 updated for new signet block signing method 🔗
    • Will the availability of signet eliminate the need for a new testnet? 🔗
  • Transaction pinning
    • Discussion of attacks against LN, including transaction pinning 🔗
    • Using attacks such as transaction pinning against eltoo 🔗
  • Addr v2
    • Summary of Bitcoin Core PR Review Club discussion about an addr v2 PR 🔗
  • Anonymity networks
    • Bitcoin Core PR Review Club on a proposed implementation of BIP155 addr v2 🔗
  • Coinswap
    • Discussion about routed coinswaps 🔗
  • Compact block filters
    • Bitcoin Core #19070 allows advertising support for serving BIP157 filters 🔗
  • Covenants
    • Discussion about how Simplicity could be used for covenants 🔗
  • Discreet Log Contracts (DLCs)
    • Beta application announced for creating test DLC derivatives 🔗
  • Dual funding
    • C-Lightning #3954 adds locktime support to PSBT RPCs for dual funding 🔗
  • Eltoo
    • Using attacks like transaction pinning and selective relay against eltoo 🔗
  • Expiration floods
    • LN developer discussion about flood and loot attacks 🔗
  • Large channels
    • LND 0.11.0-beta released with support for large channels by default 🔗
  • MAST
    • Discussion about the evolution of MAST (and other things) into taproot 🔗
  • Multipath payments
    • LND #4521 improves invoice routing hints for multipath payments 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Sapio: a new language for building contracts with OP_CHECKTEMPLATEVERIFY 🔗
  • Payjoin
    • Wasabi adds support for BIP78 payjoin 🔗
  • Schnorr signatures
    • Proposal to update BIP340 schnorr signatures to use evenness tiebreaker 🔗
  • Segregated witness
    • BIPs #947 updates the BIP325 specification of signet to allow segwit-style virtual transactions 🔗
  • SIGHASH_ANYPREVOUT
    • Discussion of various topics, including SIGHASH_ANYPREVOUT 🔗
  • Simplicity
    • Transcript on implementing Simplicity as a taproot leaf version 🔗
  • Taproot
    • Discussion of various topics, including taproot activation 🔗
  • Testnet
    • Question: will there by a testnet4? 🔗

July 2020

  • Partially signed bitcoin transactions
    • Bitcoin Core #19215 adds additional data to PSBTs for segwit inputs 🔗
    • C-Lightning #3775 adds RPCs for creating and using PSBTs 🔗
    • Electrum 4.0.1 replaces their partial transactions format with PSBTs 🔗
    • Initial release of Lily Wallet supports PSBTs 🔗
    • Field Report: Using PSBT at River Financial 🔗
    • LND #4455 makes it safe to batch open channels using PSBTs 🔗
  • Taproot
    • New chatroom for discussing taproot activation 🔗
    • Upgrading LN commitment formats, including for taproot 🔗
    • Question about leaf versions in taproot 🔗
    • Question about the different features in taproot for upgrading 🔗
    • Discussion about backporting wtxid relay for taproot activation 🔗
  • Multipath payments
    • Eclair #1427 and #1439 add support to Eclair for sending multipath payments 🔗
    • Eclair 0.4.1 adds support for sending multipath payments 🔗
    • Zap 0.7.0 Beta adds support for multipath payments 🔗
    • C-Lightning #3809 adds support for sending of multipath payments 🔗
  • Spontaneous payments
    • LND #4167 allows spontaneous payments made using keysend to be held 🔗
    • Zap 0.7.0 Beta adds support for spontaneous payments 🔗
    • C-Lightning #3792 adds support for sending keysend spontaneous payments 🔗
    • Eclair #1485 adds support for keysend spontaneous payments 🔗
  • Coinswap
    • Presentation about coinswaps 🔗
    • Presentation about succinct atomic swaps 🔗
  • Segregated witness
    • BIPs #933 adds BIP339 for transaction relay announcement using segwit wtxids 🔗
    • Bitcoin Core #18044 adds support for announcing and requesting transactions by their segwit wtxid 🔗
  • Soft fork activation
    • BIPs #550 revises BIP8 to allow use without initial mandatory lock-in 🔗
    • Taproot activation discussion on mailing list and in new IRC room 🔗
  • Watchtowers
    • Service proposed for storing presigned watchtower transactions 🔗
    • Presentation about watchtower protocol development 🔗
  • Anchor outputs
    • Eclair #1484 adds basic support for anchor outputs 🔗
  • Bech32(m)
    • Proposed updates to BIP173 bech32 to address mutability concerns 🔗
  • Channel commitment upgrades
    • Upgrading channel commitment formats 🔗
  • Compact block relay
    • Consequences of not backporting taproot relay on compact block efficiency 🔗
  • Eltoo
    • Upgrading LN commitment formats, including for eltoo 🔗
  • Gap limits
    • Proposed BIP for BIP32 path templates, with maximum derivation limit 🔗
  • HD key generation
    • Proposed BIP for BIP32 path templates 🔗
  • Hold invoices
    • Zap 0.7.0 Beta adds support for hold invoices 🔗
  • Hash Time Locked Contract (HTLC)
    • Discussion about the incentives to mine HTLCs 🔗
  • Hardware wallet interface (HWI)
    • Initial release of Lily Wallet supports HWI 🔗
  • Large channels
    • LND #4429 enables support for large channels by default 🔗
  • Scriptless multisignatures
    • Discussion of multisignatures and threshold signatures 🔗
  • MuSig
    • Presentations and discussions about musig-style multiparty signatures 🔗
  • Out-of-band fees
    • Discussion of HTLC mining incentives and out-of-band fees 🔗
  • Output script descriptors
    • Field Report: Using descriptors at River Financial 🔗
  • Package relay
    • New BIP339 wtxid transaction announcements simplifies package relay 🔗
  • Payjoin
    • New BIP78 specification of payjoin 🔗
  • Schnorr signatures
    • Presentations and discussions about schnorr signatures 🔗
  • SIGHASH_ANYPREVOUT
    • Request to replace BIP118 with the SIGHASH_ANYPREVOUT proposal 🔗
  • Simplicity
    • Question about implementing taproot with Simplicity 🔗
  • Statechains
    • Transcript about watchtowers and their usefulness for statechains 🔗
  • Submarine swaps
    • Electrum 4.0.1 adds support for submarine swaps 🔗
  • Threshold signature
    • Discussion about digital signatures schemes, including threshold signatures 🔗
  • Transaction origin privacy
    • Bitcoin Core #19109 adds a per-peer rolling bloom filter to track recent tx announcements 🔗
  • Vaults
    • Service proposed for storing presigned vault transactions 🔗

June 2020

May 2020

  • Large channels
    • C-Lightning 0.8.2 released with support for large channels 🔗
    • LND 0.10.0-beta released with the ability to create invoices over 0.043 BTC 🔗
    • C-Lightning fixes incompatibility when opening large channels with Eclair 🔗
  • Multipath payments
    • LND 0.10 presentation: multipath payments 🔗
    • LND 0.10.0-beta released with support for multipath payments 🔗
    • Lightning Loop adds support for multipath payments 🔗
  • Partially signed bitcoin transactions
    • LND 0.10 presentation: funding channels using PSBTs 🔗
    • LND 0.10.0-beta released with support for funding channels using PSBTs 🔗
    • C-Lightning #3738 adds initial support for creating PSBTs 🔗
  • Spontaneous payments
    • C-Lightning 0.8.2 released with a plugin for sending spontaneous payments 🔗
    • Juggernaut uses spontaneous payments for messaging and instant payments” 🔗
    • Breez wallet adds support for spontaneous payments 🔗
  • Taproot
    • Request for additional signature commitment to previous scriptPubKeys 🔗
    • Request for comments on amending BIP341 taproot transaction digest 🔗
    • Example sizes of multisig taproot transactions 🔗
  • Responsible disclosures
    • John Newbery responsibly disclosed memory Dos vulnerability in Bitcoin Core 🔗
    • John Newbery responsibly disclosed CPU-wasting DoS in Bitcoin Core 🔗
  • Schnorr signatures
    • BIP340 schnorr updated with alternative tiebreaker & nonce recommendation 🔗
    • RFC6979 nonce generation versus BIP340’s recommended procedure 🔗
  • Anchor outputs
    • LND 0.10 presentation: anchor outputs 🔗
  • Anonymity networks
    • Presentation on enhancements in LND 0.10, including better Tor support 🔗
  • Coinjoin
    • Allowing hardware wallets to safely sign automated coinjoin transactions 🔗
  • Coinswap
    • Two-transaction cross chain atomic swap or same-chain coinswap 🔗
  • Compact block filters
    • Bitcoin Core #18877 adds getcfcheckpt and cfcheckpt messages 🔗
  • Consensus cleanup soft fork
    • Discussion of minimum safe transaction sizes 🔗
  • Child pays for parent (CPFP)
    • Copay adds support for CPFP fee bumping incoming transactions 🔗
  • CVEs (various)
    • CVE-2017-12842: discussion about minimum transaction size 🔗
  • Dual funding
    • C-Lightning #3738 adds initial support for PSBTs, part of dual funding 🔗
  • Eclipse attacks
    • Presentation about attacking Bitcoin Core, including using eclipse attacks 🔗
  • Generic signmessage
    • Simplified BIP322, only allowing signatures from one script per proof 🔗
  • Output script descriptors
    • Bitcoin Core #16528 adds support for native output descriptor wallets 🔗
  • Signet
    • BIP325 updated: all signets to use same genesis block but different magic 🔗
  • Simplicity
    • Transcript on next generation smart contracting with Simplicity 🔗
  • Timelocks
    • New cross-chain coinswap construction that only requires timelocks on one chain 🔗
  • Transaction origin privacy
    • Bitcoin Core #18861 only allows a peer to request a tx if it informed that peer about the tx 🔗
  • Watchtowers
    • C-Lightning #3659 adds support for watchtowers 🔗

April 2020

  • Multipath payments
    • LND #3970 adds support for multipath payments to its payment lifecycle 🔗
    • LND #3967 adds support for sending multipath payments 🔗
    • Rust-Lightning #441 adds support for simplified multipath payments 🔗
  • Scriptless multisignatures
    • Mitigating power analysis attacks, including against multisignature schemes 🔗
    • Alternative to ECDSA multisignatures for signature adaptors 🔗
    • Implementing statechains for ECDSA using multisignatures 🔗
  • Adaptor signatures
    • ECDSA signature adaptors for statechains with secure multiparty computation 🔗
    • Work on PTLCs for LN using simplified ECDSA signature adaptors 🔗
  • Covenants
    • Vault prototype using pre-signed transactions 🔗
    • Demo implementation of a multisig vaults covenant prototype 🔗
  • Large channels
    • C-Lightning #3612 adds support for option_support_large_channel 🔗
    • LND #4075 allows creating invoices over 0.043 BTC 🔗
  • Partially signed bitcoin transactions
    • LND #4079 adds support for funding channels with PSBTs 🔗
    • Bitcoin Core #17509 allows saving and loading PSBTs from files 🔗
  • Rendez-vous routing
    • C-Lightning #3600 adds experimental support for onion messages using blinded paths 🔗
    • C-Lightning #3623 adds a minimal implementation for spending payments using blinded paths 🔗
  • Schnorr signatures
    • Implementing statechains without schnorr signatures 🔗
    • Mitigating differential power analysis in schnorr signatures 🔗
  • Unannounced channels
    • C-Lightning #3600 adds blinded paths to improve unannounced channel privacy 🔗
    • C-Lighting #3623 improves unannounced channel privacy when routing payments 🔗
  • Vaults
    • Vault prototype written in Python 🔗
    • Revault: an implementation of multiparty vaults 🔗
  • Anchor outputs
    • Using anchor outputs to ensure HTLC sends can be fee bumped 🔗
  • CLTV expiry delta
    • New attack against LN payment atomicity: raising CLTV expiry delta recommended 🔗
  • Eltoo
    • Implementing statechains without eltoo 🔗
  • Fee estimation
    • LND #4078 adds an estimatemode configuration setting for configuring its fee estimation 🔗
  • Generic signmessage
    • Proposed update to BIP322 generic signmessage 🔗
  • HD key generation
    • Proposal for using one BIP32 keychain to seed multiple child keychains 🔗
  • Hash Time Locked Contract (HTLC)
    • Using inconsistencies in node mempools to attack HTLC atomicity 🔗
  • Onion messages
    • C-Lightning #3600 adds experimental support for onion messages using blinded paths 🔗
  • OP_CHECKTEMPLATEVERIFY
    • Vault prototype with sample implementation using OP_CHECKTEMPLATEVERIFY 🔗
  • Package relay
    • New LN attack; full solution requires package relay 🔗
  • Payjoin
    • BTCPay adds support for sending and receiving payjoined payments 🔗
  • Proof of reserves
    • BIP322 generic signmessage updated to remove abstraction for proof of reserves 🔗
  • Point Time Locked Contracts (PTLCs)
    • Simplified ECDSA adaptor signatures for PTLCs in LN channels 🔗
  • Quantum resistance
    • Question about paying public keys directly versus hash indirection 🔗
  • Reproducible builds
    • Bitcoin Core #17595 adds Guix support for Windows builds 🔗
  • Responsible disclosures
    • John Newbery responsibly disclosed tx censorship vulnerability co-discovered by Amiti Uttarwar 🔗
  • Signer delegation
    • Implementing statechain delegation without schnorr or eltoo 🔗
  • Simplicity
    • Question about Simplicity and static analysis 🔗
  • Spontaneous payments
    • C-Lightning #3611 adds a keysend plugin to support spontaneous payments 🔗
  • Statechains
    • Discussion about implementing statechains without schnorr or eltoo 🔗
  • Timelocks
    • Using decrementing locktimes instead of eltoo for statechains 🔗

March 2020

February 2020

January 2020

December 2019

November 2019

October 2019

September 2019

August 2019

July 2019

June 2019

May 2019

April 2019

March 2019

February 2019

January 2019

December 2018

November 2018

October 2018

September 2018

August 2018

July 2018

June 2018

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