more context in json-rpc errors

Author: mfornos

src/json-rpc/polkadot/chain-head/header.ts

@@ -44,7 +44,11 @@ export const chainHead_v1_header = (
 						);
 					}
 				} else {
-					logger.error(`Error response for ${keyOf(req)}`);
+					logger.error("Error response for {key} {method}: {res}", {
+						key: keyOf(req),
+						method: req.method,
+						res,
+					});
 				}
 			},
 		});

src/json-rpc/polkadot/chain-head/ops/handler.ts

@@ -57,7 +57,11 @@ const forwardHandler = ({
 	return forwardChainHeadHandler({
 		afterResponse: (req, res, { upstream, upstreamSubId, downstream }) => {
 			if (!isSuccess(res)) {
-				logger.error(`Error response for ${req.id}`);
+				logger.error("Error response for {id} {method}: {res}", {
+					id: req.id,
+					method: req.method,
+					res,
+				});
 				return;
 			}
 
@@ -202,7 +206,11 @@ const forwardWithCacheHandler = ({
 			const localId = req.params[0];
 
 			if (!isSuccess(res)) {
-				logger.error(`Error response for ${keyOf(req)}`);
+				logger.error("Error response for {key} {method}: {res}", {
+					key: keyOf(req),
+					method: req.method,
+					res,
+				});
 				return;
 			}