lnrpc: expose network name in GetInfo

Previously only a testnet boolean was available which
made it impossible to distinguish between regtest and
mainnet.

lnrpc/rpc.proto

@@ -1134,11 +1134,13 @@ message GetInfoResponse {
     /// Whether the wallet's view is synced to the main chain
     bool synced_to_chain = 9 [json_name = "synced_to_chain"];
 
-    /// Whether the current node is connected to testnet
-    bool testnet = 10 [json_name = "testnet"];
+    /** 
+    Whether the current node is connected to testnet. This field is 
+    deprecated and the network field should be used instead 
+    **/
+    bool testnet = 10 [json_name = "testnet", deprecated = true];
 
-    /// A list of active chains the node is connected to
-    repeated string chains = 11 [json_name = "chains"];
+    reserved 11;
 
     /// The URIs of the current node.
     repeated string uris = 12 [json_name = "uris"];
@@ -1151,6 +1153,17 @@ message GetInfoResponse {
 
     /// Number of inactive channels
     uint32 num_inactive_channels = 15 [json_name = "num_inactive_channels"];
+
+    /// A list of active chains the node is connected to
+    repeated Chain chains = 16 [json_name = "chains"];
+}
+
+message Chain {
+    /// The blockchain the node is on (eg bitcoin, litecoin)
+    string chain = 1 [json_name = "chain"];
+
+    /// The network the node is on (eg regtest, testnet, mainnet)
+    string network = 2 [json_name = "network"];
 }
 
 message ConfirmationUpdate {

lnrpc/rpc.swagger.json

@@ -1284,6 +1284,17 @@
       "description": "- `p2wkh`: Pay to witness key hash (`WITNESS_PUBKEY_HASH` = 0)\n- `np2wkh`: Pay to nested witness key hash (`NESTED_PUBKEY_HASH` = 1)",
       "title": "* \n`AddressType` has to be one of:"
     },
+    "lnrpcChain": {
+      "type": "object",
+      "properties": {
+        "chain": {
+          "type": "string"
+        },
+        "network": {
+          "type": "string"
+        }
+      }
+    },
     "lnrpcChangePasswordRequest": {
       "type": "object",
       "properties": {
@@ -1859,14 +1870,7 @@
         "testnet": {
           "type": "boolean",
           "format": "boolean",
-          "title": "/ Whether the current node is connected to testnet"
-        },
-        "chains": {
-          "type": "array",
-          "items": {
-            "type": "string"
-          },
-          "title": "/ A list of active chains the node is connected to"
+          "title": "* \nWhether the current node is connected to testnet. This field is \ndeprecated and the network field should be used instead"
         },
         "uris": {
           "type": "array",
@@ -1888,6 +1892,13 @@
           "type": "integer",
           "format": "int64",
           "title": "/ Number of inactive channels"
+        },
+        "chains": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/lnrpcChain"
+          },
+          "title": "/ A list of active chains the node is connected to"
         }
       }
     },