Systemd service files and readme

docs/setup/asb/README.md

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+# Setting up the ASB
+
+Setup guidelines for the automated swap backend.
+
+## systemd services
+
+We configure two pathes for starting the asb through systemd. 
+
+Upon system startup we first start the monero wallet RPC and then start the asb using two services:
+
+```
+start-monero-wallet-rpc.service 
+|-> start-asb.service
+```
+
+We trigger re-building the asb from source every 24 hours through the `pull-and-build-asb` timer and service.
+The watcher-service `watch-asb-binary-change.path ` monitors the asb binary changing, and if changed triggers `restart-asb.service` that will restart `start-asb.service`:
+
+```
+pull-and-build-asb.timer 
+|-> pull-and-build-asb.service 
+    |-> watch-asb-binary-change.path 
+        |-> restart-asb.service 
+            |-> start-asb.service
+```

docs/setup/asb/systemd/pull-and-build-asb.service

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+[Unit]
+Description=Pull and build ASB from source
+After=start-asb.service
+Wants=pull-and-build-asb.timer
+
+[Service]
+Type=oneshot
+WorkingDirectory=/var/external/asb/xmr-btc-swap
+ExecStartPre=git pull
+ExecStart=/home/asb/.cargo/bin/cargo build --release --bin asb
+ExecStopPost=ExecStopPost=/bin/sh -c 'if [ "$$EXIT_STATUS" -ne 0 ]; then /usr/local/bin/systemd-email.sh daniel@coblox.tech %n; fi'
+StandardOutput=append:/var/external/asb/run/logs/log_pull-build_stdout.log
+StandardError=append:/var/external/asb/run/logs/log_pull-build_stderr.log
+User=asb
+Group=asb
+
+[Install]
+WantedBy=multi-user.target

docs/setup/asb/systemd/pull-and-build-asb.timer

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+[Unit]
+Description=triggers the service that pulls and builds asb
+Requires=pull-and-build-asb.service
+
+[Timer]
+OnCalendar=*-*-* 16:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target

docs/setup/asb/systemd/restart-asb.service

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+[Unit]
+Description=Restart ASB service
+After=watch-asb-binary-change.path
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/systemctl restart start-asb.service
+ExecStopPost=/bin/sh -c 'if [ "$$EXIT_STATUS" -ne 0 ]; then /usr/local/bin/systemd-email.sh daniel@coblox.tech %n; fi'
+
+[Install]
+WantedBy=multi-user.target

docs/setup/asb/systemd/start-asb.service

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+[Unit]
+Description=Run the automated swap backend
+After=start-monero-wallet-rpc.service
+
+[Service]
+WorkingDirectory=/var/external/asb/xmr-btc-swap
+ExecStart=/home/asb/.cargo/bin/cargo run --release --bin asb -- --config /var/external/asb/run/asb-config/config.toml start
+ExecStopPost=/bin/sh -c 'if [ "$$EXIT_STATUS" -ne 0 ]; then /usr/local/bin/systemd-email.sh daniel@coblox.tech %n; fi'
+StandardOutput=append:/var/external/asb/run/logs/log_stdout.log
+StandardError=append:/var/external/asb/run/logs/log_stderr.log
+Restart=on-failure
+User=asb
+Group=asb
+
+[Install]
+WantedBy=multi-user.target

docs/setup/asb/systemd/start-monero-wallet-rpc.service

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+[Unit]
+Description=monero-wallet-rpc for the automated swap backend (asb)
+After=network.target
+
+[Service]
+ExecStart=/var/external/asb/monero/bin/monero-wallet-rpc --stagenet --daemon-host stagenet.community.xmr.to --rpc-bind-port 38083 --disable-rpc-login --wallet-dir /var/external/asb/monero/data/stagenet/asb-wallets
+ExecStartPost=/bin/bash -c "i=1; while [ $i -ne 0 ]; do tail -n1 /var/external/asb/monero/bin/monero-wallet-rpc.log | grep 'Starting wallet RPC server'; i=$?; sleep 5; done"
+ExecStopPost=/bin/sh -c 'if [ "$$EXIT_STATUS" -ne 0 ]; then /usr/local/bin/systemd-email.sh daniel@coblox.tech %n; fi'
+Restart=always
+User=asb
+Group=asb
+
+[Install]
+WantedBy=multi-user.target

docs/setup/asb/systemd/watch-asb-binary-change.path

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+[Path]
+Unit=restart-asb.service
+PathChanged=/var/external/asb/xmr-btc-swap/target/release/asb
+
+[Install]
+WantedBy=multi-user.target