deps: upgrade protobuf to >=6.33 and grpcio to >=1.76

Update protobuf and grpcio dependencies to use floating version ranges,
improving flexibility for downstream users.

Dependency updates:
- protobuf: ==6.32.1 -> >=6.33,<7
- grpcio: ==1.75.1 -> >=1.76
- grpcio-tools: ==1.75.1 -> >=1.76

Changes:
- Update pyproject.toml, contrib/pyln-grpc-proto/pyproject.toml,
  and contrib/pyln-testing/pyproject.toml
- Remove stale contrib/pyln-grpc-proto/uv.lock (referenced old protobuf3)
- Regenerate protobuf files with grpcio-tools 1.76
- Remove manual protoc installation from CI setup.sh, now relies on
  grpcio-tools bundled protoc for version consistency

Changelog-Changed: Upgraded protobuf to >=6.33 and grpcio to >=1.76 for better downstream compatibility

Author: cdecker

.github/scripts/setup.sh

@@ -71,29 +71,7 @@ uv sync --all-extras --all-groups
 # required for reckless till poetry to uv migration
 uv tool install poetry
 
-# We also need a relatively recent protobuf-compiler, at least 3.12.0,
-# in order to support the experimental `optional` flag.
-
-# BUT WAIT!  Gentoo wants this to match the version from the Python protobuf,
-# which comes from the same tree.  Makes sense!
-
-# And
-#   grpcio-tools-1.69.0` requires `protobuf = ">=5.26.1,<6.0dev"`
-
-# Now, protoc changed to date-based releases, BUT Python protobuf
-# didn't, so Python protobuf 4.21.12 (in Ubuntu 23.04) corresponds to
-# protoc 21.12 (which, FYI, is packaged in Ubuntu as version 3.21.12).
-
-# In general protobuf version x.y.z corresponds to protoc version y.z
-
-# Honorable mention go to Matt Whitlock for spelunking this horror with me!
-
-PROTOC_VERSION=29.4
-PB_REL="https://github.com/protocolbuffers/protobuf/releases"
-curl -LO $PB_REL/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-linux-x86_64.zip
-sudo unzip protoc-${PROTOC_VERSION}-linux-x86_64.zip -d /usr/local/
-sudo chmod a+x /usr/local/bin/protoc
-export PROTOC=/usr/local/bin/protoc
-export PATH=$PATH:/usr/local/bin
-env
-ls -lha /usr/local/bin
+# We use grpcio-tools which bundles a compatible protoc compiler.
+# This ensures the protoc version matches the protobuf Python package,
+# avoiding version mismatches between generated code and runtime.
+# The Makefile uses `uv run python -m grpc_tools.protoc` for code generation.

contrib/pyln-grpc-proto/pyln/grpc/node_pb2_grpc.py

@@ -5,7 +5,7 @@
 
 from pyln.grpc import node_pb2 as node__pb2
 
-GRPC_GENERATED_VERSION = '1.75.1'
+GRPC_GENERATED_VERSION = '1.76.0'
 GRPC_VERSION = grpc.__version__
 _version_not_supported = False
 
@@ -18,7 +18,7 @@
 if _version_not_supported:
     raise RuntimeError(
         f'The grpc package installed is at version {GRPC_VERSION},'
-        + f' but the generated code in node_pb2_grpc.py depends on'
+        + ' but the generated code in node_pb2_grpc.py depends on'
         + f' grpcio>={GRPC_GENERATED_VERSION}.'
         + f' Please upgrade your grpc module to grpcio>={GRPC_GENERATED_VERSION}'
         + f' or downgrade your generated code using grpcio-tools<={GRPC_VERSION}.'

contrib/pyln-grpc-proto/pyproject.toml

@@ -6,10 +6,10 @@ authors = [{ name = "Christian Decker", email = "decker@blockstream.com" }]
 license = { text = "MIT" }
 readme = "README.md"
 requires-python = ">=3.9,<4.0"
-dependencies = ["grpcio==1.75.1", "protobuf==6.32.1"]
+dependencies = ["grpcio>=1.76", "protobuf>=6.33,<7"]
 
 [dependency-groups]
-dev = ["grpcio==1.75.1", "mypy-protobuf<4", "grpcio-tools==1.75.1"]
+dev = ["grpcio>=1.76", "mypy-protobuf<4", "grpcio-tools>=1.76"]
 
 [tool.hatch.build.targets.wheel]
 packages = ["pyln"]

contrib/pyln-grpc-proto/uv.lock

@@ -23,7 +23,7 @@ dependencies = [
 dev = ["pyln-client", "pyln-grpc-proto"]
 
 [project.optional-dependencies]
-grpc = ["pyln-grpc-proto>=0.1", "grpcio>=1.75.0"]
+grpc = ["pyln-grpc-proto>=0.1", "grpcio>=1.76"]
 
 [tool.hatch.build.targets.wheel]
 packages = ["pyln"]

contrib/pyln-testing/pyproject.toml

@@ -7,10 +7,9 @@ requires-python = ">=3.9.2,<4.0"
 dependencies = [
   "Mako>=1.1.6",
   "websocket-client>=1.2.3",
-  "grpcio-tools==1.75.1",
-  "grpcio==1.75.1",
-  # We want a specific version of protobuf to match CI's .github/scripts/setup.sh
-  "protobuf==6.32.1",
+  "grpcio-tools>=1.76",
+  "grpcio>=1.76",
+  "protobuf>=6.33,<7",
   "cryptography>=46",
   "pyln-client",
   "pyln-proto",