Doccumentation on LND RPC libs

build_sdcard.sh

@@ -338,7 +338,6 @@ if [ "${binaryChecksum}" != "${bitcoinSHA256}" ]; then
   exit 1
 fi
 
-
 # check gpg finger print
 sudo -u admin wget https://bitcoin.org/laanwj-releases.asc
 if [ ! -f "./laanwj-releases.asc" ]
@@ -480,6 +479,21 @@ if [ ${#installed} -eq 0 ]; then
   exit 1
 fi
 
+# prepare python for lnd api use
+# https://dev.lightning.community/guides/python-grpc/
+# 
+echo ""
+echo "*** LND API for Python ***"
+sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 2
+sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.5 1
+echo "to switch between python2/3: sudo update-alternatives --config python"
+sudo apt-get -f -y install virtualenv
+sudo -u admin virtualenv lnd
+sudo -u admin source lnd/bin/activate
+sudo -u admin pip install grpcio grpcio-tools googleapis-common-protos
+
+echo ""
+
 # Go is needed for ZAP connect later
 echo "*** Installing Go ***"
 wget https://storage.googleapis.com/golang/go1.11.linux-armv6l.tar.gz

home.admin/config.scripts/lnd.initwallet.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 import codecs, grpc, os, sys, base64
-from lnd060libs import rpc_pb2 as ln
+from lndlibs import rpc_pb2 as ln
-from lnd060libs import rpc_pb2_grpc as lnrpc
+from lndlibs import rpc_pb2_grpc as lnrpc
 
 # display config script info
 if len(sys.argv) <= 1 or sys.argv[1] == "-h" or sys.argv[1] == "help":

home.admin/config.scripts/lndlibs/README.md

@@ -0,0 +1,29 @@
+For every new LND version the LND RPC libs need to be compiled from the matching protobuff files.
+Do this on a raspberrypi with the exact same python version the scripts will be are running on.
+See https://dev.lightning.community/guides/python-grpc/
+
+Make sure Virtual Environment is setup: 
+```
+sudo apt-get -f -y install virtualenv
+virtualenv lnd
+source lnd/bin/activate
+pip install grpcio grpcio-tools googleapis-common-protos
+```
+
+Normally that is already done by build_sdcard.sh for user admin user. So just run:
+```
+source lnd/bin/activate
+````
+
+Now to generate the lnd RPC libs:
+
+```
+git clone https://github.com/googleapis/googleapis.git
+curl -o rpc.proto -s https://raw.githubusercontent.com/lightningnetwork/lnd/master/lnrpc/rpc.proto
+python -m grpc_tools.protoc --proto_path=googleapis:. --python_out=. --grpc_python_out=. rpc.proto
+````
+
+*NOTE: If LND master branch is already a version ahead .. use the rpc.proto from the version tagged branch.*
+
+Now copy the generated RPC libs per SCP over to your Laptop and add them to the `/home/admin/config.scripts/lndlibs`.
+