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1891 indexed events in 71 months

2018 | 2019 | 2020 | 2021

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 🔗
  • 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 🔗
  • 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 🔗
  • 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

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 🔗
  • 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

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 🔗
  • 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

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? 🔗

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 🔗
  • 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

September 2020

  • Anchor outputs
    • LND #4558 updates LND to the latest anchor outputs specification 🔗
    • 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 🔗

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 🔗

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 🔗
  • 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 🔗
  • 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

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December 2019

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April 2019

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December 2018

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