+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".

+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".

+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".

+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".++## Changes to services and client software++*In this monthly feature, we highlight interesting updates to Bitcoin+wallets and services.*++- **Blockstream announces Jade hardware wallet:**+  Blockstream's [new Jade hardware wallet][blockstream jade blog] is open source,+  supports Bitcoin and Liquid networks, and is compatible with Blockstream Green+  for Android.++- **Coldcard adds payjoin signing:**+  Coldcard's [3.2.1 release][coldcard 3.2.1] adds [BIP78][] payjoin signing+  support and various multisig improvements.++- **Mempool v2.0.0 released:**+  Open source [block explorer][topic block explorers] mempool, which backs the

 def read_metadata(self):     def add_change(self, entry: Change) -> bool:         typ = b'\x01' if entry.snapshot is None else b'\x02'         if typ == b'\x01':-            payload = b'\x00'.join([t.encode('UTF-8') for t in entry.transaction])+            stmts = [t.encode('UTF-8') if isinstance(t, str) else t for t in entry.transaction]+            payload = b'\x00'.join(stmts)

+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".++## Changes to services and client software++*In this monthly feature, we highlight interesting updates to Bitcoin+wallets and services.*++FIXME:bitschidty++## Releases and release candidates++*New releases and release candidates for popular Bitcoin infrastructure+projects.  Please consider upgrading to new releases or helping to test+release candidates.*++FIXME:harding to update Tuesday++- [Bitcoin Core 0.21.0][Bitcoin Core 0.21.0] is a the next major version+  of this full node implementation and its associated wallet and other+  software.  Major new features include support for Tor version 3 hidden+  services using [version 2 `addr` messages][topic addr v2], the optional+  ability to serve [compact block filters][topic compact block filters],+  support for [signets][topic signet] (including the default signet+  which has [taproot][topic taproot] activated).  It also offers+  experimental support for wallets that natively use [output script+  descriptors][topic descriptors].  For a complete list of changes, see+  the [release notes][bcc 0.21.0 notes].++- [Rust Bitcoin 0.26.0][] is a new release of this library.  Major new+  features include support for signet, version 2 `addr` messages,+  and several improvements to [PSBT][topic psbt] handling.  See its+  [release notes][rb notes] for details.++- [BTCPay Server 1.0.6.7][] in the second maintenance release to+  [1.0.6.5][btcpay server 1.0.6.5] from last week, which added "support+  [for] a subset of output descriptors in the wallet setup" (see the+  *notable changes* section below).  Other features and bug fixes were+  also included.++- [C-Lightning 0.9.3rc2][c-lightning 0.9.3] is a release candidate for a+  new minor version of this LN node.++- [LND 0.12.0-beta.rc5][LND 0.12.0-beta] is the latest release candidate+  for the next major version of this LN node.++## Notable code and documentation changes++*Notable changes this week in [Bitcoin Core][bitcoin core repo],+[C-Lightning][c-lightning repo], [Eclair][eclair repo], [LND][lnd repo],+[Rust-Lightning][rust-lightning repo], [libsecp256k1][libsecp256k1+repo], [Hardware Wallet Interface (HWI)][hwi repo],+[Rust Bitcoin][rust bitcoin repo], [BTCPay Server][btcpay server repo],+[Bitcoin Improvement Proposals (BIPs)][bips repo], and [Lightning+BOLTs][bolts repo].*++- [Bitcoin Core #19937][] signet mining utility FIXME:jnewbery++- [LND #4917][] disables the use of [anchor outputs][topic anchor+  outputs] by default, a feature that was planned to be released in the+  upcoming 0.12.0-beta.  Advanced users can still opt-in to using

+---+title: 'Bitcoin Optech Newsletter #132'+permalink: /en/newsletters/2021/01/20/+name: 2021-01-20-newsletter+slug: 2021-01-20-newsletter+type: newsletter+layout: newsletter+lang: en+---+This week's newsletter summarizes posts to the Bitcoin-Dev mailing list+about payjoin adoption and making hardware wallets compatible with more+advanced Bitcoin features.  Also included are our regular sections with+overviews of changes to services and client software, new releases and+release candidates, and changes to popular Bitcoin infrastructure+software.++## News++- **Payjoin adoption:** Chris Belcher [posted][belcher payjoin] to the+  Bitcoin-Dev mailing list a request for people to look for ways to+  increase [payjoin][topic payjoin] adoption along with a [wiki+  page][payjoin wiki] tracking the projects that provide either sending+  or receiving support for payjoin.  One [suggestion][raw payjoin] by+  Craig Raw was to extend the protocol to allow it to work even when the+  receiver doesn't operate a server.++- **Making hardware wallets compatible with more advanced Bitcoin features:**+  Kevin Loaec [started a discussion][loaec hww] on the Bitcoin-Dev+  mailing list about how hardware wallets could be changed to allow them+  to handle scripts more complicated than single-sig or multisig.  For+  example, allowing a hardware wallet to handle in-channel LN payments+  or payments made from a [vault][topic vaults].  His post does a good+  job of describing various problems that current hardware wallets can't+  handle, but he notes that necessary "changes may be very difficult".++## Changes to services and client software++*In this monthly feature, we highlight interesting updates to Bitcoin+wallets and services.*++- **Blockstream announces Jade hardware wallet:**+  Blockstream's [new Jade hardware wallet][blockstream jade blog] is open source,+  supports Bitcoin and Liquid networks, and is compatible with Blockstream Green+  for Android.++- **Coldcard adds payjoin signing:**+  Coldcard's [3.2.1 release][coldcard 3.2.1] adds [BIP78][] payjoin signing+  support and various multisig improvements.++- **Mempool v2.0.0 released:**+  Open source [block explorer][topic block explorers] mempool, which backs the+  [mempool.space][mempool.space website] website, has released [version+  2.0.0][mempool v2]. Mempool supports Bitcoin Core, Electrum, and Esplora+  backends and also exposes block, transaction, and address information via APIs.++- **BlueWallet adds multisig:**+  Version [6.0.0 of BlueWallet][bluewallet 6.0.0. tweet] adds the ability to+  create and manage air-gapped, native segwit multisig vaults.++- **Sparrow supports connecting to Bitcoin Core:**+  [Sparrow 0.9.10][sparrow 0.9.10], using [Bitcoin Wallet Tracker v0.2.1][bwt+  0.2.1]'s Java Native Interface bindings feature, now supports connecting+  directly to a backing Bitcoin Core node.++## Releases and release candidates++*New releases and release candidates for popular Bitcoin infrastructure+projects.  Please consider upgrading to new releases or helping to test+release candidates.*++FIXME:harding to update Tuesday++- [Bitcoin Core 0.21.0][Bitcoin Core 0.21.0] is a the next major version+  of this full node implementation and its associated wallet and other+  software.  Major new features include support for Tor version 3 hidden+  services using [version 2 `addr` messages][topic addr v2], the optional+  ability to serve [compact block filters][topic compact block filters],+  support for [signets][topic signet] (including the default signet+  which has [taproot][topic taproot] activated).  It also offers+  experimental support for wallets that natively use [output script+  descriptors][topic descriptors].  For a complete list of changes, see+  the [release notes][bcc 0.21.0 notes].++- [Rust Bitcoin 0.26.0][] is a new release of this library.  Major new+  features include support for signet, version 2 `addr` messages,+  and several improvements to [PSBT][topic psbt] handling.  See its+  [release notes][rb notes] for details.++- [BTCPay Server 1.0.6.7][] in the second maintenance release to+  [1.0.6.5][btcpay server 1.0.6.5] from last week, which added "support+  [for] a subset of output descriptors in the wallet setup" (see the+  *notable changes* section below).  Other features and bug fixes were+  also included.++- [C-Lightning 0.9.3rc2][c-lightning 0.9.3] is a release candidate for a+  new minor version of this LN node.++- [LND 0.12.0-beta.rc5][LND 0.12.0-beta] is the latest release candidate+  for the next major version of this LN node.++## Notable code and documentation changes++*Notable changes this week in [Bitcoin Core][bitcoin core repo],+[C-Lightning][c-lightning repo], [Eclair][eclair repo], [LND][lnd repo],+[Rust-Lightning][rust-lightning repo], [libsecp256k1][libsecp256k1+repo], [Hardware Wallet Interface (HWI)][hwi repo],+[Rust Bitcoin][rust bitcoin repo], [BTCPay Server][btcpay server repo],+[Bitcoin Improvement Proposals (BIPs)][bips repo], and [Lightning+BOLTs][bolts repo].*++- [Bitcoin Core #19937][] signet mining utility FIXME:jnewbery++- [LND #4917][] disables the use of [anchor outputs][topic anchor+  outputs] by default, a feature that was planned to be released in the+  upcoming 0.12.0-beta.  Advanced users can still opt-in to using+  anchors.  The commit messages notes that, "the plan is to enable+  anchors by default [in a later release]."++- [Rust-Lightning #742][] improves the signer API by providing per-transaction+  information necessary for the signer to perform additional checks and provide+  a signature. This PR is part of a larger effort to support external signers in+  Rust-Lightning tracked [here][Rust-Lightning #408].++- [BTCPay Server #2169][] adds functions that provide support for+  decoding [output script descriptors][topic descriptors] referring to+  wallets created following BIPs [44][BIP44] (P2PKH HD wallets),+  [45][BIP45] (P2SH multisig HD wallets), [49][BIP49] (P2SH-P2WPKH HD+  wallets), [84][BIP89] (native P2WPKH HD wallets), and a [proposed

 def get_ideal_ratio(channels: list, enough_liquidity: Millisatoshi):   def feeadjust_would_be_nice(plugin: Plugin):-    try:+    commands = [c for c in plugin.rpc.help().get("help") if c["command"].split()[0] == "feeadjust"]

 def get_ideal_ratio(channels: list, enough_liquidity: Millisatoshi):   def feeadjust_would_be_nice(plugin: Plugin):-    try:+    commands = [c for c in plugin.rpc.help().get("help") if c["command"].split()[0] == "feeadjust"]