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Frequently Asked Questions and Notes

Public JoinMarket Order Book links

Signet links

SSH hardening options

SSH key authentication

2FA with TOTP

  • Detailed guide: https://pimylifeup.com/setup-2fa-ssh/

  • See all the options at: https://www.mankier.com/1/google-authenticator#Options

  • Commands:

    sudo apt-get update
sudo apt-get install libpam-google-authenticator
google-authenticator --time-based --force --disallow-reuse --qr-mode=UTF8 --rate-limit=3 --rate-time=30 --window-size=3

echo "auth required pam_google_authenticator.so" | sudo tee -a /etc/pam.d/sshd

sudo sed -i "s/^ChallengeResponseAuthentication no/ChallengeResponseAuthentication yes/g" /etc/ssh/sshd_config

sudo systemctl restart sshd

  • test without exiting first by connecting to the localhost:
    ssh joinmarket@127.0.0.1

  • verify that the login with paasword and 2FA works before exiting the terminal

  • Set 2FA up for ssh key authentication:

    sudo sed -i "s/^@include common-auth/#@include common-auth/g" /etc/pam.d/sshd
echo "AuthenticationMethods publickey,keyboard-interactive" | sudo tee -a /etc/ssh/sshd_config
sudo systemctl restart sshd

2FA with Yubikey

  • for recent linux and Mac clients
  • based on https://rameerez.com/how-to-use-yubikey-to-log-in-via-ssh-to-server/ 
    # Check the OpenSSH version is above: 8.2 (https://www.openssh.com/txt/release-8.2)
ssh -V

# Check is allowed to generate -sk (security key) type keys (see the article above for Mac) 
ssh-keygen help
# should show the line:  [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]

# generate key
ssh-keygen -t ecdsa-sk -f ~/.ssh/yubikey

# copy with:
ssh-copy-id -i ~/.ssh/yubikey user@host
# or display to be copied manually to the ~/.ssh/authorized_keys file on the server:
cat ~/.ssh/yubikey.pub

Log in through SSH using a hardware wallet

SSH through Tor from Linux

On a RaspiBlitz

  • use the existing script to create a hidden service on your blitz:
    ./config.scripts/tor.onion-service.sh ssh 22 22
  • get the Hidden Service address to connect to with:
    sudo cat /mnt/hdd/tor/ssh/hostname

On a Debian based Linux Desktop (Ubuntu, Debian, MX Linux etc.)

  • needs Tor running on your desktop:
    sudo apt-get install tor

  • might need to add:
    sudo apt-get install torsocks

  • edit the Tor config file:
    sudo nano /etc/tor/torrc

  • add:

    # Hidden Service for ssh
HiddenServiceDir /var/lib/tor/ssh
HiddenServiceVersion 3
HiddenServicePort 22 127.0.0.1:22

  • Restart Tor:
    sudo systemctl restart tor

  • get the Hidden Service address to connect to with:
    sudo cat /mnt/hdd/tor/ssh/hostname

Use ssh with torsocks on the desktop (needs Tor installed):
torsocks ssh admin@HiddenServiceAddress.onion

Allow Tor to connect to localhost

  • To solve the error when running $ torsocks python yg-privacyenhanced.py wallet.jmdat

    [INFO]  starting yield generator
[INFO]  Listening on port 27183
[INFO]  Starting transaction monitor in walletservice
1580214062 WARNING torsocks[28563]: [connect] Connection to a local address are     denied since it might be a TCP DNS query to a local DNS server. Rejecting it for    safety reasons. (in tsocks_connect() at connect.c:192)

  • Edit the torsocks.conf and activate the option AllowOutboundLocalhost 1:
    $ sudo nano /etc/tor/torsocks.conf

    # Set Torsocks to allow outbound connections to the loopback interface.
# If set to 1, connect() will be allowed to be used to the loopback interface
# bypassing Tor. If set to 2, in addition to TCP connect(), UDP operations to
# the loopback interface will also be allowed, bypassing Tor. This option
# should not be used by most users. (Default: 0)
AllowOutboundLocalhost 1

  • Restart Tor:
    sudo systemctl restart tor

Set up Armbian on the Hardkernel Odroid HC1 / XU4

  • Download the base image (.img.gz), the .sha and .asc file https://www.armbian.com/odroid-xu4/
  • Verify: https://docs.armbian.com/User-Guide_Getting-Started/#how-to-check-download-authenticity 
    gpg --keyserver ha.pool.sks-keyservers.net --recv-key DF00FAF1C577104B50BF1D0093D6889F9F0E78D5
# gpg: key 93D6889F9F0E78D5: public key "Igor Pecovnik # <igor@armbian.  com>" imported
# gpg: Total number processed: 1
# gpg:               imported: 1
gpg --verify Armbian_21.02.3_Odroidxu4_buster_legacy_4.14.222.img.xz.asc
# gpg: assuming signed data in 'Armbian_21.02.3_Odroidxu4_buster_legacy_4.14.222.img.xz'
# gpg: Signature made Tue 09 Mar 2021 03:00:30 GMT
# gpg:                using RSA key DF00FAF1C577104B50BF1D0093D6889F9F0E78D5
# gpg: Good signature from "Igor Pecovnik <igor@armbian.com>" [unknown]
# gpg:                 aka "Igor Pecovnik (Ljubljana, Slovenia) <igor.pecovnik@gmail.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: DF00 FAF1 C577 104B 50BF  1D00 93D6 889F 9F0E 78D5
shasum -c Armbian_21.02.3_Odroidxu4_buster_legacy_4.14.222.img.xz.sha
# Armbian_21.02.3_Odroidxu4_buster_legacy_4.14.222.img.xz: OK
  • Preparation
    Make sure you have a good & reliable SD card and a proper power supply. Archives can be uncompressed with 7-Zip on Windows, Keka on OS X and 7z on Linux (apt-get install p7zip-full). RAW images can be written with Etcher (all OS).
  • Boot
    Insert the SD card into the slot, connect a cable to your network if possible or a display and power your board. (First) boot (with DHCP) takes up to 35 seconds with a class 10 SD Card.
  • Login
    Log in as: root Password: 1234. Then you are prompted to change this password (US-Keyboard setting). When done, you are asked to create a normal user-account for your everyday tasks.
  • Change the password.
  • Create a new user called joinmarket and set the password (the password will be changed to joininbox).
    Keep pressing [ENTER] to use the default user information.
  • Continue to install JoininBox

Download and verify Raspbian SDcard image for a Raspberry Pi

To be able to open the JoinMarket-QT GUI on the desktop from the RPI need to use the Raspberry Pi OS (32-bit) with desktop image

Error when connecting to a full node remotely through Tor

  • Getting the error: 
    socket.gaierror: [Errno -2] Name or service not known
  • Remember to use torsocks with the python scripts when connecting remotely through Tor. Example:
    torsocks wallet-tool.py wallet.jmdat

Erase the joinmarket user and the /home/joinmarket folder

sudo srm -rf /home/joinmarket/
sudo userdel -rf joinmarket

Sample bitcoin.conf for a remote node accepting RPC connections through LAN

# Bitcoind options
server=1
daemon=1
disablewallet=0
main.wallet=wallet.dat

# Connection settings
rpcuser=REDACTED
rpcpassword=REDACTED
rpcport=8332
# SET THE LOCAL SUBNET
rpcallowip=192.168.1.0/24
main.rpcbind=0.0.0.0

# Tor only
onlynet=onion
proxy=127.0.0.1:9050
main.bind=127.0.0.1

# for Bisq
peerbloomfilters=1

Using the 2.13" WaveShare e-ink display

https://www.waveshare.com/wiki/2.13inch_e-Paper_HAT https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md SPI0 is disabled by default. To enable it, use raspi-config, or ensure the line dtparam=spi=on isn't commented out in /boot/config.txt

  • Installation

    #Install BCM2835 libraries
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.60.tar.gz
tar zxvf bcm2835-1.60.tar.gz 
cd bcm2835-1.60/
sudo ./configure
sudo make
sudo make check
sudo make install
#For more details, please refer to http://www.airspayce.com/mikem/bcm2835/

#Install wiringPi libraries

sudo apt-get install wiringpi

#For Pi 4, you need to update it：
cd /tmp
wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
gpio -v
#You will get 2.52 information if you install it correctly

#Install Python libraries
#python3
sudo apt-get update
sudo apt-get install python3-pip
sudo apt-get install python3-pil
sudo apt-get install python3-numpy
sudo pip3 install RPi.GPIO
sudo pip3 install spidev

  • Test:

    sudo git clone https://github.com/waveshare/e-Paper
cd e-Paper/RaspberryPi\&JetsonNano/python/examples
sudo python epd_2in13_V2_test.py

Code examples:
https://github.com/waveshare/e-Paper/blob/master/RaspberryPi%26JetsonNano/python/examples/epd_2in13_V2_test.py https://github.com/21isenough/LightningATM/blob/master/displays/waveshare2in13.py

Compile Tor for the RPi Zero (armv6l)

https://2019.www.torproject.org/docs/debian#source

Build the SDcard image

Boot Ubuntu Live from USB: https://releases.ubuntu.com/focal/ubuntu-20.04.2-desktop-amd64.iso

  • Connect to a secure WiFi (hardware switch on) or LAN

Download and verify the base image

  • Open a terminal
  • Paste the following commands (see the comments for the explanations and an example output) 
    # Download the base image:
wget https://raspi.debian.net/verified/20210210_raspi_4_buster.img.xz

# Download the PGP signed sha256 hash
wget https://raspi.debian.net/verified/20210210_raspi_4_buster.xz.sha256.asc

# Verify:
# download the signing pubkey
gpg --receive-key E2F63B4353F45989
# verify the PGP signed sha256 hash
gpg --verify 20210210_raspi_4_buster.xz.sha256.asc
# Look for the output 'Good signature':
# gpg: Signature made Wed 10 Feb 2021 20:22:05 GMT
# gpg:                using EDDSA key 60B3093D96108E5CB97142EFE2F63B4353F45989
# gpg: Good signature from "Gunnar Wolf <gwolf@gwolf.org>" [unknown]
# gpg:                 aka "Gunnar Eyal Wolf Iszaevich <gwolf@iiec.unam.mx>" [unknown]
# gpg:                 aka "Gunnar Wolf <gwolf@debian.org>" [unknown]
# gpg: Note: This key has expired!
# Primary key fingerprint: 4D14 0506 53A4 02D7 3687  049D 2404 C954 6E14 5360
#     Subkey fingerprint: 60B3 093D 9610 8E5C B971  42EF E2F6 3B43 53F4 5989

# compare the hash to the hash of the image file
sha256sum --check 20210210_raspi_4_buster.xz.sha256.asc
# Look for the output 'OK':
# 20201112_raspi_4.img.xz: OK
# sha256sum: WARNING: 10 lines are improperly formatted

Flash the base image to the SDcard

  • Connect an SDcard reader with a 8GB SDcard.
  • In the file manager open the context menu (right click) on the .img.xz file.
  • Select the option Open With Disk Image Writer.
  • Write the image to the SDcard.

Prepare the base image

  • Before the first boot edit the sysconf.txt on the RASPIFIRM partition to be able to ssh remotely - needs an authorized ssh pubkey.
  • Generate ssh keys on Ubuntu with (keep selecting the defaults with ENTER): 
    ssh-keygen -t rsa -b 4096
  • Click on the RASPIFIRM volume once in the file manager to mount it
  • Copy the ssh pubkey from the Ubuntu image to the sysconf.txt the RASPIFIRM directory (make sure it is mounted): 
    echo "root_authorized_key=$(cat ~/.ssh/id_rsa.pub)" | tee -a /media/ubuntu/RASPIFIRM/sysconf.txt
# Check with:
cat /media/ubuntu/RASPIFIRM/sysconf.txt
    The sysconf.txt will reset after boot and moves the ssh pubkey to /root/.ssh/authorized_keys
  • Place the SDcard in the RPi, boot up and connect with ssh (use the hostname, arp -a or check the router) 
    ssh root@rpi4-20210210
  • Install basic dependencies 
    apt-get update
apt-get install sudo wget

Install Joininbox

  • Download and run the build script 
    # download
wget https://raw.githubusercontent.com/openoms/joininbox/master/build_joininbox.sh
# inspect the script
cat build_joininbox.sh
# run
sudo bash build_joininbox.sh
  • Monitor/Check outputs for warnings/errors

Prepare the SDcard release

  • Make the SDcard image safe to share by removing unique infos like ssh pubkeys and network identifiers: 
    /home/joinmarket/standalone/prepare.release.sh
  • Disconnect WiFi/LAN on build laptop (hardware switch off) and shutdown
  • Remove Ubuntu LIVE USB stick and cut power from the RaspberryPi

Sign the image on an airgapped computer

  • Connect USB stick with Tails (stay offline)
  • Power on the Build Laptop (press F12 for boot menu)
  • Connect USB stick with GPG signing keys - decrypt drive if needed
  • Open Terminal and cd into directory of USB Stick under /media/amnesia
  • Run gpg --import backupsecretkey.gpg, check and exit
  • Disconnect USB stick with GPG keys
  • Take the SD card from the RaspberryPi and connect with an external SD card reader to the laptop
  • Click on the RASPIFIRM volume once in the file manager to mount it
  • Connect another USB stick, open in file manager and delete old files
  • Open Terminal and cd into directory of USB stick under /media/amnesia
  • Run lsblk to check on the SD card device name (ignore last partition number)
  • Clone the SDcard:
    dd if=/dev/[sdcarddevice] | gzip > joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz
  • When finished you should see that more than 7GB was copied.
  • Create sha256 hash of the image:
    sha256sum *.gz > joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256
  • Sign the sha256 hash file:
    gpg --detach-sign --armor *.sha256
  • Check the files: 
    ls
  joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz
  joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256
  joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256.asc
  • Shutdown the build computer
  • Upload the new image to server - put the .sig file and sha256sum.txt next to it
  • Copy the sha256sum to GitHub README and update the download link

Verify the downloaded the image

Linux instructions

  • Open a terminal in the directory with the downloaded files 
    joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz
joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256
joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256.asc
  • Paste the following commands (see the comments for the explanations and an example output) 
    # Import the signing pubkey: 
curl https://keybase.io/oms/pgp_keys.asc | gpg --import 

# Verify the signature of the sha256 hash:
gpg --verify *.asc 
# Look for the output 'Good signature':
# gpg: assuming signed data in 'joininbox-v0.2.0-2021-02-15.img.gz.sha256'
# gpg: Signature made Mon 15 Feb 2021 14:16:56 GMT
# gpg:                using RSA key 13C688DB5B9C745DE4D2E4545BFB77609B081B65
# gpg: Good signature from "openoms <oms@tuta.io>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 13C6 88DB 5B9C 745D E4D2  E454 5BFB 7760 9B08 1B65

# Compare the sha256 hash to the hash of the image file
shasum -c *.sha256
# Look for the output 'OK' :
# joininbox-v0.2.0-2021-02-15.img.gz: OK

Windows instructions

  • Download and open the PGP verification software for Windows from https://www.gpg4win.org
  • Verify the joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256 file
  • The signature is in the file:
    joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256.asc
  • The signing PGP key is: https://keybase.io/oms/pgp_keys.asc
  • Display the sha256 hash from the joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz.sha256 file with Notepad or use the command more:
    C:\> more *.sha256
  • Get the sha256 hash of the image file with the built-in tool certutil:
    C:\> certUtil -hashfile C:\joininbox-vX.X.X-YEAR-MONTH-DAY.img.gz SHA256
  • Compare the two hashes to ensure the authenticity and integrity of the downloaded image.

Wallet recovery

JoinMarket docs:

on JoininBox

  • Connect the remote bitcoind with CONFIG -> CONNECT menu so it checks if the connection is successful. It will also set the remote watch-only wallet in bitcoind to "joininbox" so will need to rescan that after recovering an old wallet with previously used addresses.

  • When using the CLI and connecting to the remote node over Tor, you will need to use the script with the torsocks prefix like:
    torsocks python3 wallet-tool.py --recoversync -g 20 ~/.joinmarket/wallets/wallet.jmdat

on the remote node

  • Use the menu option WALLET -> RESCAN or follow manually

  • the wallet defined as rpc_wallet = in the joinmarket.cfg is the wallet which is used as watch only in the remote bitcoind. You need to run rescanblockchain on that wallet in bitcoind after importing the joinmarket wallet.

  • The wallet is set in the joinmarket.cfg (by default called joininbox should show up when you run:
    bitcoin-cli listwallets

  • To rescan on the node run (https://developer.bitcoin.org/reference/rpc/rescanblockchain.html?highlight=rescanblockchain):
    bitcoin-cli -rpcwallet=joininbox rescanblockchain 477120
    Rescanning from the first SegWit block is sufficient for the default SegWit wallets.

  • Monitor progress (on a RaspiBlitz):
    sudo tail -fn 100 /mnt/hdd/bitcoin/debug.log
    Once the rescan is finished you balances should appear in the INFO menu (wallet-tool.py)

USB SSD recommendation

JoininBox operates on the minimum viable hardware under the assumption that the seed (and passphrase) of the wallets used is safely backed up and can be recovered fully

  • The above warning is especially true for SDcard as they fail often, use a good quality one.
  • If using an external USB drive I recommend using a Sandisk Extreme Pro 128GB USB SSD: https://twitter.com/openoms/status/1362486943301459968
  • a good alternative is a USB connector and internal SSD as in the RaspiBlitz shopping list. Pay attention to choose a compatible SATA-USB adapter since that is a common problem with the Raspberry Pi 4.
  • Cheap USB drives are very likely to fail after weeks of heavy usage: raspiblitz/raspiblitz#924

Pruned node notes

It is only recommended to create a new wallet on a pruned node. Importing an old wallet is not possible without downloading the whole blockchain again (would be too slow and unreliable when using an SDcard only).

To recover a wallet one will need to connect to a node without pruning switched on and rescan there. When the funds are recovered they can be sent to the addresses created with a new wallet started on a pruned node.

More info: https://bitcoin.stackexchange.com/questions/99681/how-can-i-import-a-private-key-into-a-pruned-node/99853#99853

External drive

Alternatively to a pruned node there could be a larger >400 GB storage connected and mounted on the standalone JoininBox with the .bitcoin directory containing the blocks and chainstate symlinked to /home/store/app-data/ and owned by the bitcoin user.

  • See the manual commands and output: 
    lsblk
# NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
# sda           8:0    0 931.5G  0 disk 
# └─sda1        8:1    0 931.5G  0 part 
# mmcblk1     179:0    0  29.1G  0 disk 
# └─mmcblk1p1 179:1    0  28.8G  0 part /
# zram0       253:0    0 995.2M  0 disk [SWAP]
# zram1       253:1    0    50M  0 disk /var/log
sudo mkdir -p /mnt/hdd
sudo mount /dev/sda1 /mnt/hdd
lsblk
# NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
# sda           8:0    0 931.5G  0 disk 
# └─sda1        8:1    0 931.5G  0 part /mnt/hdd
# mmcblk1     179:0    0  29.1G  0 disk 
# └─mmcblk1p1 179:1    0  28.8G  0 part /
# zram0       253:0    0 995.2M  0 disk [SWAP]
# zram1       253:1    0    50M  0 disk /var/log
ls -la /mnt/hdd
# drwxr-xr-x  7 1005 1006 4096 Mar 21 10:38 bitcoin
source ~/_functions.sh
installBitcoinCoreStandalone
# remove symlink
sudo rm /home/bitcoin/.bitcoin
# create new symlink
sudo ln -s /mnt/hdd/bitcoin /home/bitcoin/.bitcoin
# fix permissions
sudo chown -R bitcoin:bitcoin /home/bitcoin/.bitcoin/
# check
ls -la /home/bitcoin/.bitcoin/
# total 25676
# drwxr-xr-x  7 bitcoin bitcoin     4096 Mar 21 10:38 .
# drwxr-xr-x  4 root    root        4096 Mar 20 18:51 ..
# -rw-------  1 bitcoin bitcoin      105 Mar 21 10:38 anchors.dat
# -rw-------  1 bitcoin bitcoin   224355 Jan 13 20:04 banlist.dat
# -r--r--r--  1 bitcoin bitcoin      674 Mar 20 19:03 bitcoin.conf
# drwxrwxr-x  3 bitcoin bitcoin   135168 Mar 20 23:57 blocks
# drwxrwxr-x  2 bitcoin bitcoin    98304 Mar 21 10:38 chainstate
# -rw-------  1 bitcoin bitcoin  2631680 Mar 21 10:38 debug.log
# -rw-------  1 bitcoin bitcoin   247985 Mar 21 10:38 fee_estimates.dat
# drwx------  4 bitcoin bitcoin     4096 Dec  6 14:18 indexes
# -rw-------  1 bitcoin bitcoin        0 Feb 10 10:57 .lock
# -rw-------  1 bitcoin bitcoin 21369746 Mar 21 10:38 mempool.dat
# -rw-------  1 bitcoin bitcoin      820 Jan 28 19:07 onion_private_key
# -rw-------  1 bitcoin bitcoin       99 Feb 10 10:58 onion_v3_private_key
# -rw-------  1 bitcoin bitcoin  1521305 Mar 21 10:38 peers.dat
# -rw-r--r--  1 bitcoin bitcoin        7 Mar 21 10:08 settings.json
# drwx------ 34 bitcoin bitcoin     4096 Dec  7 23:39 specter
# drwx------  2 bitcoin bitcoin     4096 Mar 21 10:38 wallet.dat
installMainnet
...
# # OK - the bitcoind.service is now enabled
# 
# # Installed Bitcoin Core version v0.21.0
# 
# # Monitor the bitcoind with: sudo tail -f /home/bitcoin/.bitcoin/mainnet/debug.log
# 
# # Create wallet.dat ...
# error code: -28
# error message:
# Loading block index...
# check progress
sudo tail -f /home/bitcoin/.bitcoin/debug.log | grep progress
# 2021-03-23T12:12:34Z UpdateTip: new best=0000000000000000000c503fbc0e2724b4713dbbb8b0f0048177fc3aaebe0b9b height=675602 version=0x20400000 log2_work=92.750996 tx=626795389 date='2021-03-21T11:05:10Z' progress=0.999011 cache=5.4MiB(48880txo)

IRC server settings

Install JoinMarket without the QT GUI and dependencies

  • Run the build script with the options BRANCH GITHUBUSER without-qt: 
    sudo bash build_joininbox.sh openoms master without-qt
  • or in the JoininBox terminal install JoinMarket with the option --qtgui false: 
    /home/joinmarket/install.joinmarket.sh --qtgui false

Run the JoinMarket-QT GUI from a different user on the same Linux desktop where JoininBox is installed

  • To disable the display access control of the xserver open a new terminal on the desktop and type: 
    xhost +
  • use the shortcut in the JoininBox terminal to open the JoinMarket-QT GUI: 
    qtgui
  • re-enable the access control with: 
    xhost -

Install Jam on a linux desktop and connect to a remote Joininbox

Signing strategy for releases

From: joinmarket-webui/jam#142 (comment)

  • Instead of creating the release tag using the GitHub UI, the signer creates it on his machine and pushes it to GitHub via: git tag -s v0.7.4 && git push origin v0.7.4. More infos on signing tags and setting up GPG with Git here.
  • The signer creates a release from the signed tag using the GitHub UI with changelog, rich title, etc. just like we had it for the past releases.