Update docs/liquid-part1.md

docs/liquid-part1.md

@@ -59,4 +59,30 @@ These new opcodes have several use cases, including double-spent protection bond
 
 ### Installation of Elements Node and Peg-In
 
+Liquid uses a variation of BTC Core program known as Elements, much of the setup and use are very similar to bitcoin. Please note that Elements **requires a fully functioning bitcoind daemon is available** (it is a sidechain, after all). Thus for this demonstration, I am using my Umbrel since it makes installing Bitcoin and Elements quite simple. 
+
+*If you are intending to run Liquid on a bare-metal setup, please refer to this [getting started guide](https://elementsproject.org/elements-code-tutorial/working-environment) to setup your environment*
+
+### Running Elements on Umbrel 
+* Install Bitcoin 'App'
+* Install Elements 'App'
+* ssh into umbrel and install the elements-cli programs [^1]
+  - `ssh umbrel.local`
+  - `$ wget https://github.com/ElementsProject/elements/releases/download/elements-23.2.1/elements-23.2.1-x86_64-linux-gnu.tar.gz`
+  - `$ tar xf elements-23.2.1-x86_64-linux-gnu.tar.gz`
+  - `$ ln -s elements-23.2.1-x86_64 elements`
+* Navigate to Elements 'App' web interface on Umbrel and copy `rpcuser` and `rpcpassword` values
+  - `$ export E_RPCUSER=elements`
+  - `$ export E_RPCPASS=XXXXXXXXXXXXXXXXXXXXXXX`
+* You should now be able to issue commands against the elements daemon
+  - `$ /elements/bin/elements-cli -rpcuser=$E_RPCUSER -rpcpassword=$E_RPCPASS getblockcount`
+  - `25846`
+
+... Go take a break, it needs to download approx 20GB ...
+
+
+Footnotes:
+[^1]: It may be possible to run the `elements-cli` command without installing it separately, however I could not find it in the container. Anyway, the download of elements node is quite small and it communicates via localport on Umbrel, so this works fine.
+
+