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.

docs/release_process.md

@@ -0,0 +1,33 @@
+# Release process
+
+### 1. Add changelog
+
+### 2. Update version number
+
+- `docs/conf.py`
+- `electrumx/__init__.py`
+
+### 3. Tag
+
+```
+$ git tag -s "$VERSION" -m "$VERSION"
+$ git push "$REMOTE_ORIGIN" tag "$VERSION"
+```
+
+### 4. Build sdist
+
+see [`contrib/sdist/`](contrib/sdist)
+
+```
+$ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./contrib/sdist/build.sh
+```
+
+### 5. Upload to PyPI
+
+```
+// $ python3 -m twine upload --repository testpypi dist/$DISTNAME
+$ python3 -m twine upload dist/$DISTNAME
+```
+
+This will prompt for a username and password. For the username, use `__token__`.
+For the password, use API token from https://pypi.org/manage/account/ , including the pypi- prefix.