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joininbox/FAQ.md

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Frequently Asked Questions and Notes

SSH through Tor from Linux

On a RaspiBlitz

  • since v1.4 there is a script to create a hidden service on your blitz:
    ./config.scripts/internet.hiddenservice.sh ssh 22 22
  • get the Hidden Service address to connect to with:
    sudo cat /mnt/hdd/tor/ssh/hostname

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

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

  • might need to add:
    sudo apt 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 torify on the desktop (needs Tor installed):
torify ssh admin@HiddenServiceAddress.onion

Allow Tor to connect to localhost

  • To solve the error when running $ torify 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 XU4

  • Download the SDcard image
    https://dl.armbian.com/odroidxu4/Buster_legacy

  • Verify
    https://docs.armbian.com/User-Guide_Getting-Started/#how-to-check-download-authenticity

    $ gpg --verify Armbian_20.02.0-rc0_Odroidxu4_buster_legacy_4.14.165.img.asc
gpg: assuming signed data in 'Armbian_20.02.0-rc0_Odroidxu4_buster_legacy_4.14.165.img'
gpg: Signature made Mon 20 Jan 2020 05:23:20 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

  • 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.
    Keep pressing [ENTER] to use the default user information.

Download and verify Raspbian SDcard image for a Raspberry Pi

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

Log in through SSH using a hardware wallet

Activate the bitcoind wallet on a RaspiBlitz

Since the RaspiBlitz v1.6 run this script: $ config.scripts/network.wallet.sh on

To set up manually:

  • Edit the bitcoin.conf:
    $ sudo nano /mnt/hdd/bitcoin/bitcoin.conf

  • Change the disablewallet option to 0:

    disablewallet=0

  • Specify the wallet to be used:

    main.wallet=wallet.dat

    The default setting in JoininBox is to use the wallet.dat.
    It needs to specified in the bitcoin.conf because otherwise when other applications (like Specter) add bitcoind wallets JoinMarket would stop working.

  • Restart bitcoind:
    $ sudo systemctl restart bitcoind

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 torify with the python scripts when connecting remotely through Tor. Example:
    torify wallet-tool.py wallet.jmdat

Nuke the joinmarket user and the /home/joinmarket folder

sudo userdel -r joinmarket

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

# bitcoind configuration

# mainnet/testnet
testnet=0

# Bitcoind options
server=1
daemon=1
txindex=1
disablewallet=0

main.wallet=wallet.dat
datadir=/mnt/hdd/bitcoin

# Connection settings
rpcuser=REDACTED
rpcpassword=REDACTED
rpcport=8332
#rpcallowip=127.0.0.1
#main.rpcbind=127.0.0.1:8332
# SET THE LOCAL SUBNET
rpcallowip=192.168.1.0/24
main.rpcbind=0.0.0.0
zmqpubrawblock=tcp://127.0.0.1:28332
zmqpubrawtx=tcp://127.0.0.1:28333

# SBC optimizations
dbcache=1512
maxorphantx=10
maxmempool=300
maxconnections=40
maxuploadtarget=5000

# Tor
onlynet=onion
proxy=127.0.0.1:9050
main.bind=127.0.0.1
test.bind=127.0.0.1
main.addnode=fno4aakpl6sg6y47.onion
main.addnode=toguvy5upyuctudx.onion
main.addnode=ndndword5lpb7eex.onion
main.addnode=6m2iqgnqjxh7ulyk.onion
main.addnode=5tuxetn7tar3q5kp.onion
dnsseed=0
dns=0

# 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

#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