Initial commit: snapshot of spesmilo/electrumx 2.0.0

Unmodified source tree of upstream commit 280cb339aa158e099eb936033eecd15719770651
("Merge pull request #389 from SomberNight/202607_release_2_0",
https://github.com/spesmilo/electrumx, release 2.0.0, 3 July 2026).

All Palladium-specific changes are in the commits that follow.

contrib/raspberrypi3/install_electrumx.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+###################
+# install electrumx
+###################
+
+# Remove "raspi-copies-and-fills" as it breaks the upgrade process
+sudo apt-get purge raspi-copies-and-fills
+
+# upgrade raspbian to 'stretch' distribution
+sudo echo 'deb http://mirrordirector.raspbian.org/raspbian/ testing main contrib non-free rpi' > /etc/apt/sources.list.d/stretch.list
+sudo apt-get update
+sudo apt-get dist-upgrade
+sudo apt-get autoremove
+
+# install electrumx dependencies
+sudo apt-get install python3-pip
+sudo apt-get install build-essential libc6-dev
+sudo apt-get install libncurses5-dev libncursesw5-dev
+sudo apt install libreadline6-dev/stable libreadline6/stable
+sudo apt-get install libleveldb-dev
+sudo apt-get install git
+sudo pip3 install plyvel
+
+# install electrumx
+git clone https://github.com/spesmilo/electrumx.git
+cd electrumx
+sudo python3 -m pip install .