feat: add Solana protocol support (GetAddress, SignTx, SignMessage)

- Generate messages_solana_pb2.py via docker_build_pb.sh (protoc 3.5.1)
- Regenerate messages_pb2.py with Solana MessageType entries (750-755)
- Add solana_get_address, solana_sign_tx, solana_sign_message to client
- Add Solana mapping in mapping.py
- Point device-protocol submodule at feature-solana (messages-solana.proto)
- Add messages-solana to build_pb.sh proto generation list

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: BitHighlander

build_pb.sh

@@ -3,7 +3,7 @@ CURDIR=$(pwd)
 cd "device-protocol"
 
 echo "Building with protoc version: $(protoc --version)"
-for i in messages messages-ethereum messages-eos messages-nano messages-cosmos messages-ripple messages-binance messages-tendermint messages-thorchain messages-osmosis messages-mayachain types ; do
+for i in messages messages-ethereum messages-eos messages-nano messages-cosmos messages-ripple messages-binance messages-tendermint messages-thorchain messages-osmosis messages-mayachain messages-solana types ; do
     protoc --python_out=$CURDIR/keepkeylib/ -I/usr/include -I. $i.proto
     i=${i/-/_}
     sed -i -Ee 's/^import ([^.]+_pb2)/from . import \1/' $CURDIR/keepkeylib/"$i"_pb2.py

device-protocol

@@ -45,6 +45,7 @@
 from . import messages_tendermint_pb2 as tendermint_proto
 from . import messages_thorchain_pb2 as thorchain_proto
 from . import messages_mayachain_pb2 as mayachain_proto
+from . import messages_solana_pb2 as solana_proto
 from . import types_pb2 as types
 from . import eos
 from . import nano
@@ -1138,6 +1139,29 @@ def mayachain_sign_tx(
 
         return resp
 
+    # ── Solana ──────────────────────────────────────────────────────
+
+    @field('address')
+    @expect(solana_proto.SolanaAddress)
+    def solana_get_address(self, address_n, show_display=False):
+        return self.call(
+            solana_proto.SolanaGetAddress(address_n=address_n, show_display=show_display)
+        )
+
+    @session
+    @expect(solana_proto.SolanaSignedTx)
+    def solana_sign_tx(self, address_n, raw_tx):
+        return self.call(
+            solana_proto.SolanaSignTx(address_n=address_n, raw_tx=raw_tx)
+        )
+
+    @session
+    @expect(solana_proto.SolanaMessageSignature)
+    def solana_sign_message(self, address_n, message):
+        return self.call(
+            solana_proto.SolanaSignMessage(address_n=address_n, message=message)
+        )
+
     @field('address')
     @expect(ripple_proto.RippleAddress)
     def ripple_get_address(self, address_n, show_display=False):

keepkeylib/client.py

@@ -9,6 +9,7 @@
 from . import messages_tendermint_pb2 as tendermint_proto
 from . import messages_thorchain_pb2 as thorchain_proto
 from . import messages_mayachain_pb2 as mayachain_proto
+from . import messages_solana_pb2 as solana_proto
 
 map_type_to_class = {}
 map_class_to_type = {}
@@ -36,6 +37,8 @@ def build_map():
             msg_class = getattr(thorchain_proto, msg_name)
         elif msg_type.startswith('MessageType_Mayachain'):
             msg_class = getattr(mayachain_proto, msg_name)
+        elif msg_type.startswith('MessageType_Solana'):
+            msg_class = getattr(solana_proto, msg_name)
         else:
             msg_class = getattr(proto, msg_name)