From ed77591aa94200eeab844dfea53d6ffb272c9525 Mon Sep 17 00:00:00 2001
From: Serge Tupchii <serge.tupchii@protonmail.com>
Date: Fri, 10 Nov 2023 21:04:29 +0200
Subject: [PATCH] fix(otel_otlp_metrics): convert histogram timestamps and fix
 'unix_nano' field names

---
 .../opentelemetry_experimental/src/otel_otlp_metrics.erl | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/apps/opentelemetry_experimental/src/otel_otlp_metrics.erl b/apps/opentelemetry_experimental/src/otel_otlp_metrics.erl
index 1115010c..8da7bdbe 100644
--- a/apps/opentelemetry_experimental/src/otel_otlp_metrics.erl
+++ b/apps/opentelemetry_experimental/src/otel_otlp_metrics.erl
@@ -85,9 +85,10 @@ to_data_points(#datapoint{attributes=Attributes,
                           exemplars=Exemplars,
                           flags=Flags
                          }) ->
+
     #{attributes => otel_otlp_common:to_attributes(Attributes),
-      start_time => opentelemetry:timestamp_to_nano(StartTime),
-      time => opentelemetry:timestamp_to_nano(CollectionStartTime),
+      start_time_unix_nano => opentelemetry:timestamp_to_nano(StartTime),
+      time_unix_nano => opentelemetry:timestamp_to_nano(CollectionStartTime),
       value => to_datapoint_value(Value),
       exemplars => Exemplars,
       flags => Flags
@@ -107,8 +108,8 @@ to_histogram_data_points(#histogram_datapoint{
                             max=Max
                            }) ->
     #{attributes => otel_otlp_common:to_attributes(Attributes),
-      start_time => StartTime,
-      time => CollectionStartTime,
+      start_time_unix_nano => opentelemetry:timestamp_to_nano(StartTime),
+      time_unix_nano => opentelemetry:timestamp_to_nano(CollectionStartTime),
       count => Count,
       sum => Sum,
       bucket_counts => Buckets,