Better error logging when /create RPC fails (#6689)

Author: eddyashton

src/node/node_state.h

@@ -1975,16 +1975,18 @@ namespace ccf
       }
 
       const auto status = ctx->get_response_status();
+      const auto& raw_body = ctx->get_response_body();
       if (status != HTTP_STATUS_OK)
       {
         LOG_FAIL_FMT(
-          "Create response is error: {} {}",
+          "Create response is error: {} {}\n{}",
           status,
-          ccf::http_status_str((ccf::http_status)status));
+          ccf::http_status_str((ccf::http_status)status),
+          std::string(raw_body.begin(), raw_body.end()));
         return false;
       }
 
-      const auto body = nlohmann::json::parse(ctx->get_response_body());
+      const auto body = nlohmann::json::parse(raw_body);
       if (!body.is_boolean())
       {
         LOG_FAIL_FMT("Expected boolean body in create response");

src/node/rpc/node_frontend.h

@@ -1484,7 +1484,7 @@ namespace ccf
         .install();
 
       auto create = [this](auto& ctx, nlohmann::json&& params) {
-        LOG_DEBUG_FMT("Processing create RPC");
+        LOG_INFO_FMT("Processing create RPC");
 
         bool recovering = node_operation.is_reading_public_ledger();