taprpc: allow importing/referencing lnd proto files

This commit allows us to use the gRPC import statement to re-use lnd
protobuf definitions. We'll use that to be able to embed lnd RPC
messages in some of the new tapchannelrpc calls.

Author: guggero

taprpc/Dockerfile

@@ -10,11 +10,13 @@ RUN apt-get update && apt-get install -y \
 # update them here if we bump the versions.
 ARG PROTOBUF_VERSION
 ARG GRPC_GATEWAY_VERSION
+ARG LND_VERSION
 
 ENV PROTOC_GEN_GO_GRPC_VERSION="v1.1.0"
 ENV FALAFEL_VERSION="v0.9.1"
 ENV GOCACHE=/tmp/build/.cache
 ENV GOMODCACHE=/tmp/build/.modcache
+ENV LND_VERSION=${LND_VERSION}
 
 RUN cd /tmp \
   && mkdir -p /tmp/build/.cache \
@@ -25,6 +27,7 @@ RUN cd /tmp \
   && go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2@${GRPC_GATEWAY_VERSION} \
   && go install github.com/lightninglabs/falafel@${FALAFEL_VERSION} \
   && go install golang.org/x/tools/cmd/[email protected] \
+  && go mod download github.com/lightningnetwork/lnd@${LND_VERSION} \
   && chmod -R 777 /tmp/build/
 
 WORKDIR /build

taprpc/gen_protos.sh

@@ -19,13 +19,15 @@ tapchannelrpc/tapchannel.proto"
 
     # Generate the protos.
     protoc -I/usr/local/include -I. \
+      -I/tmp/build/.modcache/github.com/lightningnetwork/lnd@${LND_VERSION}/lnrpc \
       --go_out . --go_opt paths=source_relative \
       --go-grpc_out . --go-grpc_opt paths=source_relative \
       "${file}"
 
     # Generate the REST reverse proxy.
     annotationsFile=${file//proto/yaml}
     protoc -I/usr/local/include -I. \
+      -I/tmp/build/.modcache/github.com/lightningnetwork/lnd@${LND_VERSION}/lnrpc \
       --grpc-gateway_out . \
       --grpc-gateway_opt logtostderr=true \
       --grpc-gateway_opt paths=source_relative \
@@ -34,6 +36,7 @@ tapchannelrpc/tapchannel.proto"
 
     # Generate the swagger file which describes the REST API in detail.
     protoc -I/usr/local/include -I. \
+      -I/tmp/build/.modcache/github.com/lightningnetwork/lnd@${LND_VERSION}/lnrpc \
       --openapiv2_out . \
       --openapiv2_opt logtostderr=true \
       --openapiv2_opt grpc_api_configuration=${annotationsFile} \
@@ -46,6 +49,7 @@ tapchannelrpc/tapchannel.proto"
   pkg="taprpc"
   opts="package_name=$pkg,js_stubs=1"
   protoc -I/usr/local/include -I. -I.. \
+    -I/tmp/build/.modcache/github.com/lightningnetwork/lnd@${LND_VERSION}/lnrpc \
     --plugin=protoc-gen-custom=$falafel\
     --custom_out=. \
     --custom_opt="$opts" \
@@ -58,6 +62,7 @@ tapchannelrpc/tapchannel.proto"
     opts="package_name=$package,manual_import=$manual_import,js_stubs=1"
     pushd $package
     protoc -I/usr/local/include -I. -I.. \
+      -I/tmp/build/.modcache/github.com/lightningnetwork/lnd@${LND_VERSION}/lnrpc \
       --plugin=protoc-gen-custom=$falafel\
       --custom_out=. \
       --custom_opt="$opts" \

taprpc/gen_protos_docker.sh

@@ -7,11 +7,13 @@ DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)"
 
 PROTOBUF_VERSION=$(go list -f '{{.Version}}' -m google.golang.org/protobuf)
 GRPC_GATEWAY_VERSION=$(go list -f '{{.Version}}' -m github.com/grpc-ecosystem/grpc-gateway/v2)
+LND_VERSION=$(go list -f '{{.Version}}' -m github.com/lightningnetwork/lnd)
 
 echo "Building protobuf compiler docker image..."
 docker build -t taproot-assets-protobuf-builder \
   --build-arg PROTOBUF_VERSION="$PROTOBUF_VERSION" \
   --build-arg GRPC_GATEWAY_VERSION="$GRPC_GATEWAY_VERSION" \
+  --build-arg LND_VERSION="$LND_VERSION" \
   .
 
 echo "Compiling and formatting *.proto files..."