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joininbox/prepare_remote_node.md
openoms 4f15046f9e
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2020-06-21 13:21:28 +01:00

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Prepare a remote node to accept the JoinMarket connection

JoinMarket (running in JoinInBox) needs to connect to Bitcoin Core.
A pruned node with the wallet enabled will do and txindex is not required.
This guide shows how to prepare a RaspiBlitz to accept this connection.

LAN connection

In the node terminal - allow remote RPC connections to Bitcoin Core

This can be skipped if you connect through Tor)

  1. Edit the bitcoin.conf:

    $ sudo nano /mnt/hdd/bitcoin/bitcoin.conf

    Change the values (edit to your local subnet):

    #rpcallowip=127.0.0.1
#rpcbind=127.0.0.1:8332
rpcallowip=192.168.1.0/24
rpcbind=0.0.0.0

  2. Restart Bitcoin Core:

    $ sudo systemctl restart bitcoind

  3. The firewall needs to be opened to allow the RPC connection from LAN

    (edit to your local subnet):
    sudo ufw allow from 192.168.1.0/24 to any port 8332
    ufw enable

Take note of the LAN_ADDRESS of the remote node and fill it in to the rpc_host in joinmarket.cfg

Tor connection

On the node - activate Tor and create a Hidden Service

Make sure that Tor is active in the SERVICES menu.

Create a Hidden Service to forward the bitcoin RPC port

On the RaspiBlitz since v1.4 there is a script to create a hidden service:
./config.scripts/internet.hiddenservice.sh bitcoinrpc 8332 8332

Alternatively proceed manually:

  1. Open the Tor configuration file:

    $ sudo nano /etc/tor/torrc

  2. Insert the lines:

    # Hidden Service v3 for bitcoinrpc
HiddenServiceDir /mnt/hdd/tor/bitcoinrpc
HiddenServiceVersion 3
HiddenServicePort 8332 127.0.0.1:8332

  3. Restart Tor:

    $ sudo systemctl restart tor

  4. Take note of the Tor_Hidden_Service.onion:

    $ sudo cat /mnt/hdd/tor/bitcoinrpc/hostname

  5. Fill in the Tor_Hidden_Service.onion to the rpc_host in the joinmarket.cfg

Take note of the Tor_Hidden_Service.onion and fill in to the rpc_host in the joinmarket.cfg

Remember to use torify with the python scripts when connecting remotely through Tor.

(Applied automatically in the JoininBox)
Example:  
`torify wallet-tool.py wallet.jmdat`

Resources: