fix signing and validation

add timestamp to signed node info

veilid-core/src/rpc_processor/coders/signature.rs

@@ -5,7 +5,7 @@ pub fn encode_signature(
     sig: &DHTSignature,
     builder: &mut veilid_capnp::ed25519_signature::Builder,
 ) {
-    if sig.valid {
+    if !sig.valid {
         panic!("don't encode invalid signatures");
     }
 

veilid-core/src/rpc_processor/coders/signed_node_info.rs

@@ -12,6 +12,8 @@ pub fn encode_signed_node_info(
     let mut sig_builder = builder.reborrow().init_signature();
     encode_signature(&signed_node_info.signature, &mut sig_builder);
 
+    builder.reborrow().set_timestamp(signed_node_info.timestamp);
+
     Ok(())
 }
 
@@ -32,5 +34,8 @@ pub fn decode_signed_node_info(
         .map_err(map_error_capnp_error!())?;
     let signature = decode_signature(&sig_reader);
 
-    SignedNodeInfo::new(node_info, NodeId::new(*node_id), signature).map_err(map_error_string!())
+    let timestamp = reader.reborrow().get_timestamp();
+
+    SignedNodeInfo::new(node_info, NodeId::new(*node_id), signature, timestamp)
+        .map_err(map_error_string!())
 }