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659 indexed events in 34 months

2018 | 2019 | 2020 | 2021

March 2021

• Hardware wallet interface (HWI)
  • Significantly updated and extended HWI documentation 🔗
  • Bitcoin Core #16546 adds external signer interface compatible with HWI 🔗
• Soft fork activation
  • BIPs #1069 makes BIP8 signal threshold configurable and reduces default 🔗
  • Taproot activation mailing list discussion; Speedy Trial attempt proposed 🔗
• Taproot
  • Alternative methods of activating taproot discussed 🔗
  • Documenting the intention to use and build upon taproot 🔗
• Addr v2
  • Bitcoin Core #20685 Adds I2P support, including addrv2 gossiping 🔗
• Anchor outputs
  • Eclair 0.5.1 adds and updates features preparing for nanchor outputs 🔗
• Bech32
  • BTCPay Server #2181 uppercases bech32 addresses in QR codes 🔗
• BIP70 payment protocol
  • Mailing list discussion about a BIP70 replacement 🔗
• Erlay
  • PR Review Club: #18261 implementing Erlay 🔗
• Replace-by-fee (RBF)
  • Recovering lost LN funding transactions after RBF fee bumping 🔗
• Spontaneous payments
  • C-Lightning #4404 allows keysending to nodes that don’t advertise support 🔗

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 🔗
• 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
  • BIPs #1056 adds BIP350 for bech32m 🔗
• Generic signmessage
  • BIPs #1048 rewrites BIP322 to simplify implementation 🔗
• 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 🔗
• SIGHASH_NOINPUT
  • 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 🔗
• 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
  • Draft BIP for bech32m 🔗
• Eclipse attacks
  • Proposed disabletx message to help allow more block-relay-only peers 🔗
• Generic signmessage
  • Proposed rewrite of BIP322 to simplify implementation 🔗
• 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

• Anchor outputs
  • LND #4782 adds watchtower client support for channels using anchor outputs 🔗
  • LND #4779 allows sweeping HTLCs from anchor outputs 🔗
  • BOLT5 updated to prevent a pinning attack against anchor outputs 🔗
  • 2020 year in review: anchor outputs 🔗
• Bech32
  • Bech32 algorithm revision research and proposal 🔗
  • Problems with QR-encoded bech32 BIP21 invoices with uppercase schema 🔗
  • Q&A: What is the difference between ‘native segwit’ and ‘bech32’? 🔗
  • 2020 year in review: taproot’s need for a modified bech32 address format 🔗
• Addr v2
  • Bitcoin Core #20564 only sends addrv2 to protocol version 70016 peers 🔗
  • BIP155 updated to require sendaddrv2 message be sent before verack 🔗
  • 2020 year in review: version 2 addr message 🔗
• Eclipse attacks
  • Review Club chat about PR #19858 to make eclipse attacks more difficult 🔗
  • Bitcoin Core PR #19858 improves partition resistance to eclipse attacks 🔗
  • 2020 year in review: fast eclipse attacks against LN nodes 🔗
• Hash Time Locked Contract (HTLC)
  • 2020 year in review: switching LN from HTLCs to PTLCs 🔗
  • 2020 year in review: HTLC mining incentives 🔗
• Partially signed bitcoin transactions
  • A new backwards-incompatible version of PSBT is proposed 🔗
  • New PSBT Toolkit software provides GUI for working with PSBTs 🔗
• Soft fork activation
  • Q&A comparison of different soft fork activation mechanisms 🔗
  • 2020 year-in-review: soft fork activation mechanisms 🔗
• Adaptor signatures
  • 2020 year in review: signature adaptors for LN channel commitments 🔗
• Compact block filters
  • 2020 year in review: compact block filters 🔗
• Generic signmessage
  • 2020 year in review: generic signmessage 🔗
• Large channels
  • 2020 year in review: large channels 🔗
• Miniscript
  • Formal specification of miniscript 🔗
• MuSig
  • 2020 year in review: MuSig2 🔗
• Output linking
  • 2020 year in review: transaction origin privacy 🔗
• Output script descriptors
  • Bitcoin Wallet Tracker (BWT) adds descriptor support 🔗
• Payjoin
  • 2020 year in review: payjoin 🔗
• Point Time Locked Contracts (PTLCs)
  • 2020 year in review: switching LN from HTLCs to PTLCs 🔗
• Replace-by-fee (RBF)
  • Sparrow wallet adds support for RBF fee bumping 🔗
• Schnorr signatures
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Signet
  • 2020 year in review: signet 🔗
• Taproot
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Tapscript
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Transaction pinning
  • BOLT5 updated to prevent a transaction pinning attack 🔗
• Vaults
  • 2020 year in review: vaults 🔗
• Watchtowers
  • LND #4782 adds watchtower client support for channels using anchor outputs 🔗

November 2020

• 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 🔗
• 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 🔗
• Signet
  • Bitcoin Core #20145 adds script for requesting signet coins 🔗

October 2020

• Generic signmessage
  • Alternative proposal for generic signmessage using virtual transactions 🔗
  • BIP322 updated to use virtual transactions 🔗
• 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
  • 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 🔗
• 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 🔗

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 🔗
• 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 🔗
• 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 🔗
• 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 🔗
• Soft fork activation
  • Conversation about segwit activation history and ideas for taproot 🔗
• 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 🔗
• 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 🔗
• 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 🔗
• Compact block filters
  • Bitcoin Core #19070 allows advertising support for serving BIP157 filters 🔗
• Covenants
  • Discussion about how Simplicity could be used for covenants 🔗
• Eltoo
  • Using attacks like transaction pinning and selective relay against eltoo 🔗
• 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 🔗
• SIGHASH_NOINPUT
  • 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 🔗
• 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
  • Proposed updates to BIP173 bech32 to address mutability concerns 🔗
• Eltoo
  • Upgrading LN commitment formats, including for eltoo 🔗
• 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 🔗
• MuSig
  • Presentations and discussions about musig-style multiparty signatures 🔗
• 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_NOINPUT
  • Request to replace BIP118 with the SIGHASH_ANYPREVOUT proposal 🔗
• Simplicity
  • Question about implementing taproot with Simplicity 🔗
• Vaults
  • Service proposed for storing presigned vault transactions 🔗

June 2020

• Taproot
  • Taproot eliminates vulnerability related to segwit fee overpayment attack 🔗
  • BIP341 transaction digest amended with extra commitment to scriptPubKeys 🔗
  • Coinpool: using taproot to help create payment pools 🔗
• Coinjoin
  • Comparison of coinjoin privacy to coinswap privacy 🔗
  • WabiSabi: a protocol for coordinated coinjoins with arbitrary output values 🔗
• Eclipse attacks
  • Time dilation attack: using eclipse attacks to steal money from LN nodes 🔗
  • Bitcoin Core 0.20 released with asmap feature to improve eclipse resistance 🔗
• Payjoin
  • Comparison of payjoin privacy to coinswap privacy 🔗
  • Discussion about payjoin and its history 🔗
• SIGHASH_NOINPUT
  • Impact of SIGHASH_NOINPUT and eltoo on LN backups 🔗
  • Coinpool: using SIGHASH_NOINPUT to help create payment pools 🔗
• Adaptor signatures
  • Paying for a PTLC pointlock using an signature adaptors 🔗
• Anchor outputs
  • Anchor outputs may help mitigate LN fee ransom attack 🔗
• Compact block filters
  • Bitcoin Core #19010 & #19044 add additional messages from BIP157 🔗
• Eltoo
  • Impact of SIGHASH_NOINPUT and eltoo on LN backups 🔗
• Hash Time Locked Contract (HTLC)
  • LN fee ransom attack against channels that accept too many HTLCs 🔗
• Hardware wallet interface (HWI)
  • Fix for segwit fee overpayment attack affects HWI compatibility 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #18027 adds GUI support for signing & broadcasting PSBTs 🔗
• Soft fork activation
  • Meetup discussion including potential soft fork activation mechanisms 🔗
• Transaction bloom filtering
  • Bitcoin Core #19260 disconnects peers who inappropriately send filterclear 🔗
• Vaults
  • Presentation of the Revault multiparty vault architecture 🔗

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 🔗
• Coinjoin
  • Allowing hardware wallets to safely sign automated coinjoin transactions 🔗
• 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 🔗
• 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 🔗
• 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 basic multipath payments 🔗
• 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 🔗
• 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 🔗
• Eltoo
  • Implementing statechains without eltoo 🔗
• Generic signmessage
  • Proposed update to BIP322 generic signmessage 🔗
• Hash Time Locked Contract (HTLC)
  • Using inconsistencies in node mempools to attack HTLC atomicity 🔗
• 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 🔗
• Point Time Locked Contracts (PTLCs)
  • Simplified ECDSA adaptor signatures for PTLCs in LN channels 🔗
• Reproducible builds
  • Bitcoin Core #17595 adds Guix support for Windows builds 🔗
• Simplicity
  • Question about Simplicity and static analysis 🔗
• Spontaneous payments
  • C-Lightning #3611 adds a keysend plugin to support spontaneous payments 🔗

March 2020

• Schnorr signatures
  • Proposed update to schnorr key selection and signature generation 🔗
  • BIP340 schnorr signature recommendations updated for improved security 🔗
• Anchor outputs
  • LND #3821 adds draft anchor commitments support 🔗
• Eclipse attacks
  • Review club discussion of Bitcoin Core #17428 anchor connections 🔗
• Generic signmessage
  • Additional request for feedback on BIP322 generic signmessage 🔗
• Large channels
  • Eclair #1323 advertise support for channel opens over ~0.17 BTC 🔗
• Miniscript
  • Question about a specification for miniscript 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #17264 includes HD derivation path in PSBTs by default 🔗
• Reproducible builds
  • Eclair #1307 updates packaging to also reproducibly build Eclair GUI 🔗
• Taproot
  • Security analysis: taproot in the generic group model 🔗
• Tapscript
  • Bitcoin Core #16902 fixes an inefficiency in OP_IF related opcodes 🔗
• Watchtowers
  • Updated watchtower BOLT specification proposal 🔗

February 2020

• Multipath payments
  • Eclair 0.3.3 adds support for multipath payments 🔗
  • LND #3957 adds code useful for Atomic Multipath Payments (AMP) support 🔗
  • Boomerang: improving latency and throughput with multipath payments 🔗
• Schnorr signatures
  • Safety of precomputed public keys used with schnorr signatures 🔗
  • BIP340 alternative x-only pubkey tiebreaker and tagged hash 🔗
  • Discussion about taproot versus other schnorr-enabling proposals 🔗
• Taproot
  • btcdeb adds tap command for experimenting with taproot and tapscript 🔗
  • Discussion about taproot versus alternatives 🔗
  • Taproot security from quantum computing threats 🔗
• Adaptor signatures
  • Taproot privacy gains, including those from signature adaptors 🔗
  • Boomerang contracts using signature adaptors for LN latency & throughput 🔗
• Covenants
  • OP_CHECKTEMPLATEVERIFY workshop report 🔗
• Eclipse attacks
  • Bitcoin Core #16702 chooses peers based on ASN instead of IP address 🔗
• Hold invoices
  • Reverse up-front payments could improve hold invoice cost spreading 🔗
• Hardware wallet interface (HWI)
  • BTCPay Vault using HWI for signing 🔗
• Large channels
  • BOLTs #596 updates BOLT2 to allow channel opens over ~0.17 BTC 🔗
• MAST
  • Discussion about taproot versus alternative MAST-enabling proposals 🔗
• OP_CHECKTEMPLATEVERIFY
  • OP_CHECKTEMPLATEVERIFY workshop summary 🔗
• Output script descriptors
  • Bitcoin Core #18032 add descriptor field to multisig address RPCs 🔗
• Partially signed bitcoin transactions
  • CKBunker using PSBTs for an HSM 🔗
• Reproducible builds
  • Eclair #1295 allows the eclair-core module to be reproducibly built 🔗
• Soft fork activation
  • OP_CHECKTEMPLATEVERIFY workshop discussion about activation mechanisms 🔗
• Spontaneous payments
  • Eclair 0.3.3 adds experimental support for trampoline payments 🔗
• Tapscript
  • btcdeb adds tap command for experimenting with taproot and tapscript 🔗
• Vaults
  • OP_CHECKTEMPLATEVERIFY (CTV) workshop discussion: using CTV with vaults 🔗

January 2020

• Unannounced channels
  • C-Lightning #3351 enhances invoice RPC for private channels 🔗
  • Eclair #1283 allows multipath payments to traverse unannounced channels 🔗
  • Breaking the link between UTXOs and unannounced channels 🔗
• Coinjoin
  • Evaluation of coinjoins without equal value inputs or outputs 🔗
  • Wormhole: a protocol for sending payments as part of a chaumian coinjoin 🔗
• Multipath payments
  • Eclair #1283 allows multipath payments to traverse unannounced channels 🔗
  • LND 0.9.0-beta adds support for receiving multipath payments 🔗
• Output linking
  • Bitcoin Core #17621 fixes potential privacy leak in the avoid_reuse flag 🔗
  • Bitcoin Core #17843 fixes balance discrepancy related to avoid_reuse flag 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #16373 allows the bumpfee RPC used for RBF to return a PSBT 🔗
  • Bitcoin Core #17492 allows the wallet GUI to place a PSBT in the clipboard 🔗
• Anchor outputs
  • LND #3829 updates code & documentation to simplify adding anchor outputs 🔗
• Eltoo
  • Modification to SIGHASH_ANYPREVOUTANYSCRIPT to improve eltoo flexibility 🔗
• OP_CHECKTEMPLATEVERIFY
  • BIPs #875 assigns BIP119 to the OP_CHECKTEMPLATEVERIFY proposal 🔗
• Output script descriptors
  • Encoded descriptors (e.g., with base64) 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #16373 allows the bumpfee RPC used for RBF to return a PSBT 🔗
• SIGHASH_NOINPUT
  • Modification to SIGHASH_ANYPREVOUTANYSCRIPT to improve eltoo flexibility 🔗
• Soft fork activation
  • Mailing list discussion of soft fork activation methods 🔗
• Taproot
  • Final organized review, presentation slides, and LN integration ideas 🔗

December 2019

• Multipath payments
  • C-Lightning #3259 adds payment secrets to prevent multipath probing 🔗
  • LND #3788 adds support for “payment addresses” (payment secrets) 🔗
  • Multiple LN implementations add multipath payment support 🔗
  • Basic multipath payment support added to LN specification 🔗
  • 2019 year-in-review: multipath payments 🔗
• Bech32
  • LND #3767 rejects malformed BOLT11 invoices with a valid bech32 checksum 🔗
  • Proposed plan to deal with bech32 malleability in variable-length addresses 🔗
  • Analysis of bech32 error detection capability 🔗
  • 2019 year-in-review: bech32 mutability 🔗
• Covenants
  • OP_CHECKOUTPUTSHASHVERIFY renamed OP_CHECKTEMPLATEVERIFY and updated 🔗
  • Suggested changes to OP_CHECKTEMPLATEVERIFY proposal 🔗
  • 2019 year-in-review: OP_CHECKTEMPLATEVERIFY 🔗
• Watchtowers
  • Watchtower BOLT specification proposed 🔗
  • Discussion about watchtowers for eltoo payment channels 🔗
  • 2019 year-in-review: watchtowers 🔗
• Eclipse attacks
  • Discussion of eclipse attacks on LN nodes 🔗
  • 2019 year-in-review: erlay and other P2P improvements 🔗
• OP_CHECKTEMPLATEVERIFY
  • OP_CHECKTEMPLATEVERIFY (CTV) replaces COSHV proposal; concerns restated 🔗
  • 2019 year-in-review: OP_CHECKTEMPLATEVERIFY 🔗
• Tapscript
  • Discussion about position commitments using signature-checking opcodes 🔗
  • 2019 year-in-review: taproot and tapscript 🔗
• Anchor outputs
  • 2019 year-in-review: anchor outputs 🔗
• AssumeUTXO
  • 2019 year-in-review: AssumeUTXO 🔗
• BIP70 payment protocol
  • 2019 year-in-review: Bitcoin Core BIP70 deprecation and disablement 🔗
• Coinjoin
  • 2019 year-in-review: SNICKER 🔗
• Consensus cleanup soft fork
  • 2019 year-in-review: consensus cleanup soft fork proposal 🔗
• Erlay
  • 2019 year-in-review: erlay 🔗
• Hash Time Locked Contract (HTLC)
  • Using eclipse attacks against nodes to prevent correct HTLC processing 🔗
• Hardware wallet interface (HWI)
  • 2019 year-in-review: HWI 🔗
• Miniscript
  • 2019 year-in-review: miniscript 🔗
• MuSig
  • Composable MuSig—concerns about safely using signer sub-groups 🔗
• OP_CODESEPARATOR
  • Discussion of OP_CODESEPARATOR design for proposed tapscript soft fork 🔗
• Reproducible builds
  • 2019 year-in-review: reproducible builds 🔗
• SIGHASH_NOINPUT
  • 2019 year-in-review: SIGHASH_ANYPREVOUT 🔗
• Signet
  • 2019 year-in-review: signet 🔗
• Taproot
  • 2019 year-in-review: taproot 🔗
• Trampoline payments
  • 2019 year-in-review: trampoline payments 🔗
• Vaults
  • 2019 year-in-review: vaults without covenants 🔗

November 2019

• Multipath payments
  • LND #3499 extends several RPCs to support tracking multipath payments 🔗
  • Eclair #1153 adds experimental support for multipath payments 🔗
  • LND #3442 preparatory PR adding features necessary for multipath payments 🔗
• Bech32
  • How does the bech32 length-extension mutation weakness work? 🔗
  • Impact of bech32 length-change mutability on v1 segwit script length 🔗
• Coin selection
  • Bitcoin Core PR#17290 coin selection for customized transactions 🔗
  • Bitcoin Core 0.19 adds wallet flag to avoid address reuse privacy loss 🔗
• Compact block filters
  • Bitcoin Core 0.19 released with RPC support for BIP158 block filters 🔗
  • Maximum number of block filters per request increased from 100 to 1,000 🔗
• CPFP carve out
  • Continued discussion of LN anchor outputs using CPFP carve-out 🔗
  • Bitcoin Core 0.19 released with CPFP carve-out 🔗
• Taproot
  • Impact of bech32 length-change mutablity on v1 segwit script length 🔗
  • Blog post about x-only schnorr pubkeys 🔗
• Addr v2
  • Proposed per-node signaling for address relay with v2 addr messages 🔗
• Anchor outputs
  • Continued discussion of LN anchor outputs 🔗
• BIP70 payment protocol
  • Bitcoin Core 0.19 released with BIP70 support disabled by default 🔗
• Erlay
  • Erlay-compatible transaction reconciliation protocol published as BIP330 🔗
• MuSig
  • MuSig and attacks based on Wagner’s algorithm 🔗
• Output linking
  • Bitcoin Core 0.19 new feature: avoid_reuse wallet flag 🔗
• Partially signed bitcoin transactions
  • Range of identifiers allocated to proprietary PSBT extensions 🔗
• Schnorr signatures
  • Blog post about x-only pubkeys for use in schnorr signature schemes 🔗
• Signet
  • Signet protocol published as BIP325 🔗
• Trampoline payments
  • Eclair #1209 adds experimental support for trampoline onion format 🔗
• Transaction bloom filtering
  • Bitcoin Core 0.19 released with bloom filters disabled 🔗

October 2019

• Schnorr signatures
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Talk summary: the quest for practical threshold Schnorr signatures 🔗
  • Announcement of structured taproot review (including schnorr) 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Taproot
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Announcement of structured taproot review 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Tapscript
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Announcement of structured taproot review (including tapscript) 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Anchor outputs
  • LN simplified commitments discussion 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#17165 removes support for BIP70 payment protocol 🔗
• CPFP carve out
  • LN simplified commitments using CPFP carve-out 🔗
• CVE-2018-17144
  • Talk summary: Near misses: what could have gone wrong 🔗
• Erlay
  • Draft BIP for enabling Erlay compatibility 🔗
• MuSig
  • Schnorr signatures and musig 🔗
• Output script descriptors
  • Descriptors extended with sortedmulti 🔗
• SIGHASH_NOINPUT
  • Continued discussion of noinput/anyprevout 🔗

September 2019

• Adaptor signatures
  • Presentation: Blockchain design patterns: Layers and scaling approaches 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#15584 disables support for BIP70 by default 🔗
• Coinjoin
  • Simple Non-Interactive Coinjoin with Keys for Encryption Reused (SNICKER) 🔗
• CPFP carve out
  • Bitcoin Core #16421 merged allowing carve outs to be RBF replaced 🔗
• Child-pays-for-parent (CPFP)
  • Refactor preparing for ancestor relay 🔗
• Eclipse attacks
  • Preventing eclipse attacks using block-relay-only connections 🔗
• Eltoo
  • Eltoo demo implementation 🔗
• Hold invoices
  • LND #3390 simplifies hold invoice logic by separate HTLC tracking 🔗
• Multipath payments
  • LND #3390 separates tracking of HTLCs from invoices as necessary for AMP 🔗
• Package relay
  • Bitcoin Core #16400 refactors code in anticipation of package relay 🔗
• Signet
  • Eltoo demo implementation using custom signet 🔗
• Taproot
  • Suggested removal of P2SH address wrapper from taproot proposal 🔗
• Tapscript
  • Tapscript resource limits 🔗
• Unannounced channels
  • Talk about LN topology and lack of public info about unannounced channels 🔗
• Watchtowers
  • Watchtower storage costs 🔗

August 2019

• Transaction bloom filtering
  • Bitcoin Core PR#16248 adds bloom filter whitelist option 🔗
  • BRD field report: using native segwit addresses with bloom filters 🔗
• Covenants
  • Bitcoin vaults without covenants 🔗
• Hash Time Locked Contract (HTLC)
  • C-Lightning #2858 limits the maximum number of pending HTLCs to limit costs 🔗
• Miniscript
  • Miniscript request for comments 🔗
• Partially signed bitcoin transactions
  • Modifying BIP174 for extensibility 🔗
• Replace-by-fee (RBF)
  • Compatibility matrix—Replace by Fee 🔗
• Schnorr signatures
  • Proposed change to schnorr pubkeys 🔗
• Signet
  • C-Lightning 0.7.2.1 released with support for signet 🔗
• Soft fork activation
  • Activation heights for previous soft forks hardcoded into Bitcoin Core 🔗
• Trampoline payments
  • BOLT PR and discussion about trampoline payments 🔗
• Vaults
  • Bitcoin vaults without covenants & weaknesses in previous vault proposals 🔗

July 2019

• Generic signmessage
  • Bitcoin Core PR opened for BIP322 signmessage support 🔗
  • Searching for a bech32 signmessage format 🔗
• Just-in-time (JIT) routing
  • Free rebalancing for JIT routing 🔗
  • Additional JIT routing discussion 🔗
• Signet
  • Progress on signet 🔗
  • C-Lightning adds support for signet 🔗
• Transaction bloom filtering
  • Bitcoin Core PR#16152 disables bloom filter support by default 🔗
  • Mailing list discussion about disabling bloom filters in Bitcoin Core 🔗
• Addr v2
  • Version 2 addr message assigned BIP155 🔗
• Coinjoin
  • Fidelity bonds for imporoved sybil resistance in distributed coinjoin 🔗
• Compact block filters
  • BIP157 bandwidth higher than BIP37 bloom filters 🔗
• CPFP carve out
  • Bitcoin Core #15681 merged with CPFP carve out 🔗
• Hash Time Locked Contract (HTLC)
  • Stuckless Payments: idea for HTLCs that can be revoked prior to acceptance 🔗
• MuSig
  • LN gossip update proposal to use MuSig 🔗
• Partially signed bitcoin transactions
  • Update to the utxoupdatepsbt RPC in Bitcoin Core 🔗
• Reproducible builds
  • Merged PR for reproducible build of Bitcoin Core using GNU Guix 🔗
• Schnorr signatures
  • Executive briefing: the next soft fork 🔗
• Sidechains
  • Notable changes: BIP301 🔗
• Tapscript
  • BIP322 signmessage forward compatibility 🔗
• Watchtowers
  • LND 0.7.0-beta release with initial watchtower support 🔗

June 2019

• Replace-by-fee (RBF)
  • Proposal to override some BIP125 RBF conditions 🔗
  • LND adds support for RBF fee bumping 🔗
  • Bitcoin Core removes mempoolreplacement configuration option 🔗
• MuSig
  • Optech executive briefing: the next soft fork 🔗
  • Breaking Bitcoin presentation: secure protocols on bip-taproot 🔗
• OP_CHECKTEMPLATEVERIFY
  • COSHV proposal replaced 🔗
  • Potential script changes, including new COSHV opcode 🔗
• AssumeUTXO
  • CoreDev.tech demo and discussion of assumeutxo 🔗
• Coin selection
  • Bitcoin Core PR#13756 adds flag to avoid address reuse privacy loss 🔗
• Consensus cleanup soft fork
  • CoreDev.tech discussion: cleanup soft fork 🔗
• Countersign
  • CoreDev.tech meetings: v2 P2P transport and countersign 🔗
• Covenants
  • CoreDev.tech discussion: potential script changes 🔗
• CPFP carve out
  • Proposal to override some BIP125 conditions, alternative to carve out 🔗
• Child-pays-for-parent (CPFP)
  • LND #3140 adds support for RBF and CPFP fee bumping sweep transactions 🔗
• Dandelion
  • Erlay compatible with BIP156 🔗
• Eclipse attacks
  • Differentiating peers based on ASN instead of address prefix 🔗
• Erlay
  • Erlay proposed 🔗
• Hardware wallet interface (HWI)
  • CoreDev.tech discussions: HWI integration into Bitcoin Core 🔗
• OP_CHECKSIGFROMSTACK
  • Discussion of potential script changes, including OP_CSFS 🔗
• Output linking
  • Bitcoin Core #13756 adds avoid_reuse wallet flag 🔗
• Reproducible builds
  • Breaking Bitcoin summaries: Bitcoin build system security 🔗
• Signet
  • CoreDev.tech discussion: signet 🔗
• Spontaneous payments
  • Using ECDH for uncoordinated LN payments 🔗
• Taproot
  • Executive briefing: the next soft fork 🔗
• Tapscript
  • Executive briefing: Taproot and Tapscript 🔗
• Transaction pinning
  • Proposal to override some BIP125 RBF conditions to avoid pinning 🔗
• Utreexo
  • Utreexo Q&A session at CoreDev.Tech 🔗
• Version 2 P2P transport
  • CoreDev.tech discussion of v2 P2P transport proposal 🔗
• Watchtowers
  • LND PR #3133 adding support for altruist watchtowers 🔗

May 2019

• Taproot
  • Reducing taproot commitment size 🔗
  • Overview of Taproot and Tapscript 🔗
  • Extended summary of bip-taproot and bip-tapscript 🔗
• OP_CHECKTEMPLATEVERIFY
  • Proposed new opcode for transaction output commitments 🔗
  • Detailed summary: proposed transaction output commitments 🔗
• SIGHASH_NOINPUT
  • New proposed SIGHASH_ANYPREVOUT mode 🔗
  • Criticism of SIGHASH_ANYPREVOUT and a generic alternative 🔗
• Tapscript
  • Extended summary of bip-taproot and bip-tapscript 🔗
  • Overview of Taproot and Tapscript 🔗
• Covenants
  • New proposed opcode: OP_CHECKOUTPUTSHASHVERIFY 🔗
• Eltoo
  • SIGHASH_ANYPREVOUT proposal compatible with Eltoo 🔗
• Hash Time Locked Contract (HTLC)
  • Example of using taproot/tapscript with HTLCs 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core 0.18 with basic hardware signer support 🔗
• MAST
  • Overview of Taproot and it’s MAST-based encumbrances 🔗
• Miniscript
  • Final stack empty, insights from miniscript development 🔗
• OP_CHECKSIGFROMSTACK
  • Criticism of OP_COSHV and SIGHASH_ANYPREVOUT; OP_CSFS as alternative 🔗
• Partially signed bitcoin transactions
  • PSBT enhancements included in Bitcoin Core 0.18 🔗
• Reproducible builds
  • New reproducibly-build architecture and Snap packages for Bitcoin Core 🔗
• Soft fork activation
  • Draft taproot proposal deliberately omits activation mechanism 🔗

April 2019

• AssumeUTXO
  • Assume valid discussion 🔗
• Compact block filters
  • Basic BIP158 support merged into Bitcoin Core 🔗
• Hold invoices
  • C-Lightning #2540 adds hook allowing plugins to implement hold invoices 🔗
• Hash Time Locked Contract (HTLC)
  • Question about whether HTLCs are cost effective for micropayments 🔗
• Sidechains
  • Elements Project bech32-like addresses 🔗
• Trampoline payments
  • Trampoline payments for LN 🔗

March 2019

• Consensus cleanup soft fork
  • Cleanup soft fork proposal 🔗
  • Consensus cleanup background 🔗
  • Consensus cleanup discussion: codeseparator & sighash types 🔗
• OP_CODESEPARATOR
  • Proposed consensus cleanup soft fork: prevent use of OP_CODESEPARATOR 🔗
  • Consensus cleanup background: legacy transaction verification 🔗
  • Discussion about cleanup soft fork: concerns about OP_CODESEPARATOR 🔗
• Addr v2
  • Version 2 addr message proposed 🔗
• Bech32
  • Bech32 sending support (24-part series) 🔗
• Block explorers
  • Esplora updated 🔗
• Hold invoices
  • LND #2022 merged adding support for hold invoices 🔗
• Hash Time Locked Contract (HTLC)
  • Lightning Loop: new tool using HTLCs for onchain/offchain swaps 🔗
• MuSig
  • Extensions to PSBTs to help make them compatible with advanced protocols 🔗
• Output linking
  • Esplora block explorer updated with privacy warning against address reuse 🔗
• Partially signed bitcoin transactions
  • Discussion of PSBT extension fields 🔗
• SIGHASH_NOINPUT
  • Discussion about increasing SIGHASH_NOINPUT_UNSAFE safety 🔗
• Signet
  • Feedback requested on signet 🔗
• Soft fork activation
  • Consensus cleanup soft fork proposal (plans for BIP9 activation) 🔗
• Version 2 P2P transport
  • Announcement of v2 P2P transport proposal 🔗
• Watchtowers
  • LND PR #2618 implementing private watchtower support 🔗

February 2019

• Adaptor signatures
  • libsecp256k1-zkp library updated with support for signature adaptors 🔗
  • Q&A: what’s the difference between taproot and signature adaptors? 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#15063 allows falling back to BIP21 parsing of BIP72 URIs 🔗
• Channel factories
  • Discussion of output tagging and its effect on eltoo and channel factories 🔗
• Dandelion
  • PRs that need more review or development 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core preliminary hardware wallet support 🔗
• MAST
  • It should be possible to upgrade miniscript for things like MAST 🔗
• Miniscript
  • Miniscript presentation 🔗
• MuSig
  • Libsecp256k1-zkp supports MuSig key and signature aggregation 🔗
• Output script descriptors
  • Descriptor checksum support added 🔗
• Partially signed bitcoin transactions
  • Three new Bitcoin Core RPCs for managing PSBTs 🔗
• Replace-by-fee (RBF)
  • RBF in the wild (survey of RBF usage) 🔗
• Reproducible builds
  • Notable Bitcoin Core PRs: reproducible builds using GNU Guix 🔗
• SIGHASH_NOINPUT
  • Tagging outputs to increase safety of SIGHASH_NOINPUT_UNSAFE 🔗
• Soft fork activation
  • Presentation about probabilistic soft fork activation (“sporks”) 🔗
• Utreexo
  • Exploring accumulators 🔗

January 2019

• Unannounced channels
  • C-Lightning #2230 adds a private flag to the listpeers RPC 🔗
  • C-Lightning #2234 adds route hints for private channels to invoice RPC 🔗
• Watchtowers
  • LND PR #2448 adding a standalone watchtower 🔗
  • LND PR #2439 adding a default policy for the watchtower 🔗
• Dandelion
  • What’s the BIP156 hold-up in Bitcoin Core? 🔗
• Eltoo
  • Optimization for Eltoo-based payment channels 🔗
• MAST
  • Should OP_CODESEPARATOR be disabled in MAST scripts? 🔗
• OP_CODESEPARATOR
  • Should OP_CODESEPARATOR be included in future Script language upgrades? 🔗
• Output linking
  • Weak signature nonces discovered in reused addresses 🔗
• Payjoin
  • Mailing list discussion about BIP79 Bustapay 🔗
• SIGHASH_NOINPUT
  • SIGHASH_NOINPUT_UNSAFE edge cases 🔗
• Spontaneous payments
  • LND PR for spontaneous LN payments 🔗

December 2018

• Minisketch
  • 2018 year-in-review: research into reducing transaction relay data 🔗
  • Minisketch library released with implications for Bitcoin and LN 🔗
• Taproot
  • Taproot (major developments of 2018, January) 🔗
  • What a taproot soft fork might look like 🔗
• Block explorers
  • Modern open source block explorer 🔗
• Channel factories
  • 2018 year-in-review: eltoo lays groundwork for channel factories 🔗
• Countersign
  • 2018 year-in-review: untrackable authentication 🔗
• CPFP carve out
  • CPFP carve out proposal 🔗
• Child-pays-for-parent (CPFP)
  • CPFP carve-out proposed 🔗
• CVE-2018-17144
  • 2018 year-in-review: CVE-2018-17144 🔗
• Dandelion
  • 2018 year-in-review notable developments: BIP156 Dandelion 🔗
• Eltoo
  • 2018 year-in-review: Eltoo 🔗
• Generic signmessage
  • 2018 year-in-review: initial discussion that became BIP322 🔗
• MAST
  • Taproot: an optimization for MAST 🔗
• MuSig
  • 2018 year-in-review: publication of MuSig protocol 🔗
• Package relay
  • CPFP carve out suggested but package relay needed for completeness 🔗
• Payjoin
  • 2018 year-in-review: Pay-to-EndPoint (P2EP) 🔗
• Replace-by-fee (RBF)
  • 2018 year-in-review: transaction statistics 🔗
• SIGHASH_NOINPUT
  • 2018 year-in-review: SIGHASH_NOINPUT 🔗
• Splicing
  • 2018 year-in-review: splicing 🔗
• Transaction pinning
  • Eltoo may not be entirely reliable because of transaction pinning 🔗

November 2018

• Adaptor signatures
  • Discussion about problems in LN solvable using signature adaptors 🔗
• Anchor outputs
  • Simplified fee bumping for LN 🔗
• Bech32
  • Bech32 security update for C implementations 🔗
• Child-pays-for-parent (CPFP)
  • Simplified fee bumping for LN 🔗
• Large channels
  • LN 1.1 specification meeting: wumbo channels and payments proposal 🔗
• Multipath payments
  • LN protocol 1.1 goals: multipath payments 🔗
• SIGHASH_NOINPUT
  • Proposal included additional data in sighashes 🔗
• Splicing
  • LN 1.1 protocol goals 🔗
• Transaction pinning
  • What is transaction pinning? 🔗
• Unannounced channels
  • LND #1944 tweaks sendtoroute RPC to allow routing via private channels 🔗
• Watchtowers
  • LND PR #2124 adding support for detecting and using onchain spends 🔗

October 2018

• Adaptor signatures
  • Multiparty ECDSA for scriptless LN channels 🔗
  • Fast multiparty ECDSA compatible with signature adaptors 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#14451 allows building Bitcoin-Qt without BIP70 support 🔗
• Covenants
  • Scaling Bitcoin Tokyo 2018, Script Roundtable: OP_CHECKSIGFROMSTACK 🔗
• CVE-2018-17144
  • CVE-2018-17144 exploited on testnet 🔗
• OP_CHECKSIGFROMSTACK
  • Discussion: the evolution of Bitcoin Script, OP_CSFS discussion 🔗
• Output script descriptors
  • Key origin support 🔗
• Point Time Locked Contracts (PTLCs)
  • Talk about implementing 2p-ECDSA for LN funding and PTLCs 🔗
• SIGHASH_NOINPUT
  • Discussion of the evolution of script: SIGHASH_NOINPUT_UNSAFE 🔗
• Splicing
  • Proposals for LN splicing 🔗
• Utreexo
  • CoreDev.Tech summaries: Utreexo 🔗
• Watchtowers
  • LND PRs #1535 and #1512 adding server-side communication for watchtowers 🔗

September 2018

• CVE-2018-17144
  • Upgrade to Bitcoin Core 0.16.3 to fix DoS vulnerability 🔗
  • Upgrade to Bitcoin Core 0.16.3 to fix CVE-2018-17144 🔗
  • Information about CVE-2018-17144 🔗
• Coinjoin
  • Sighash updates that can help hardware wallets participate in coinjoins 🔗
  • Question about Wasabi coinjoin mixing and exchange blacklisting 🔗
• Generic signmessage
  • BIP322 proposed 🔗
• Payjoin
  • Bustapay discussion (simplified alternative to P2EP) 🔗
• Version 2 P2P transport
  • Criticism and defense of BIP151 choices 🔗

August 2018

• Version 2 P2P transport
  • Continuing work on P2P protocol encryption 🔗
  • PR opened for initial BIP151 support 🔗
• BIP70 payment protocol
  • Pay-to-EndPoint (P2EP) has elements similar to BIP70 🔗
• Coinjoin
  • BLS signatures library possibly useful for non-interactive coinjoins 🔗
• Compact block filters
  • Functions for generating BIP158 filters added to Bitcoin Core 🔗
• Dandelion
  • Dandelion DoS-resistant stem routing being researched 🔗
• Minisketch
  • Researching bandwidth-efficient set reconciliation protocol 🔗
• MuSig
  • BLS signatures based on the MuSig construction 🔗
• Payjoin
  • Pay-to-EndPoint (P2EP) proposed 🔗
• Watchtowers
  • LND PR #1543 adding watchtower version 0 encoding and encryption 🔗

July 2018

• Partially signed bitcoin transactions
  • PSBT discussion 🔗
  • Features included in Bitcoin Core 0.17 🔗
  • New Bitcoin Core RPCs for initial PSBT support 🔗
• Coin selection
  • Coin selection groups for privacy and consolidation 🔗
  • Bitcoin Core unlikely to add coin selection RPC 🔗
• Schnorr signatures
  • Proposed schnorr BIP 🔗
  • Continued bip-schnorr discussion 🔗
• Coinjoin
  • CoinjoinXT presentation 🔗
• Dandelion
  • Discussion of Dandelion route selection 🔗
• Output linking
  • Bitcoin Core #12257: new -avoidpartialspends configuration option 🔗
• Output script descriptors
  • First use of descriptors in Bitcoin Core 🔗
• SIGHASH_NOINPUT
  • Renaming of SIGHASH_NOINPUT to SIGHASH_NOINPUT_UNSAFE 🔗

June 2018

• Coin selection
  • Coin selection simulations 🔗
• Compact block filters
  • Discussion of what data should be included in BIP158 filters 🔗
• OP_CODESEPARATOR
  • Bitcoin Core 0.16.1 to cease relaying transactions using OP_CODESEPARATOR 🔗

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