lnrpc: add previous_outpoints to listchaintxns

lnrpc/lightning.proto

@@ -686,7 +686,11 @@ message Transaction {
 
     // A label that was optionally set on transaction broadcast.
     string label = 10;
+
+    // PreviousOutpoints/Inputs of this transaction.
+    repeated PreviousOutPoint previous_outpoints = 12;
 }
+
 message GetTransactionsRequest {
     /*
     The height from which to list transactions, inclusive. If this value is
@@ -1007,6 +1011,15 @@ message OutPoint {
     uint32 output_index = 3;
 }
 
+message PreviousOutPoint {
+    // The outpoint in format txid:n.
+    string outpoint = 1;
+
+    // Denotes if the outpoint is controlled by the internal wallet.
+    // The flag will only detect p2wkh, np2wkh and p2tr inputs as its own.
+    bool is_our_output = 2;
+}
+
 message LightningAddress {
     // The identity pubkey of the Lightning node.
     string pubkey = 1;