From a822bcf24505a7757fa10a76fa6f250c0d0e4212 Mon Sep 17 00:00:00 2001
From: Andrew Steurer <94206073+asteurer@users.noreply.github.com>
Date: Wed, 29 Apr 2026 14:28:17 -0500
Subject: [PATCH 1/2] fix: removing hardcoded traceflag

Signed-off-by: Andrew Steurer <94206073+asteurer@users.noreply.github.com>
---
 go/tracing/conversions.go | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/go/tracing/conversions.go b/go/tracing/conversions.go
index 9be14a1..16a063b 100644
--- a/go/tracing/conversions.go
+++ b/go/tracing/conversions.go
@@ -119,10 +119,18 @@ func toOtelSpanContext(ctx wasi_otel_tracing.SpanContext) traceApi.SpanContext {
 		traceState = ts
 	}
 
+	var traceFlags traceApi.TraceFlags
+	switch ctx.TraceFlags {
+	case wasi_otel_tracing.TraceFlagsSampled:
+		traceFlags = traceApi.FlagsSampled
+	default:
+		// traceFlags is empty, which means FlagsNotSampled
+	}
+
 	return traceApi.NewSpanContext(traceApi.SpanContextConfig{
 		TraceID:    [16]byte(tid),
 		SpanID:     [8]byte(sid),
-		TraceFlags: traceApi.FlagsSampled,
+		TraceFlags: traceFlags,
 		TraceState: traceState,
 		Remote:     ctx.IsRemote,
 	})
@@ -138,10 +146,18 @@ func toWasiSpanContext(s traceApi.SpanContext) wasi_otel_tracing.SpanContext {
 		return true
 	})
 
+	var traceFlags wasi_otel_tracing.TraceFlags
+	switch s.TraceFlags() {
+	case traceApi.FlagsSampled:
+		traceFlags = wasi_otel_tracing.TraceFlagsSampled
+	default:
+		// traceFlags is empty, which means FlagsNotSampled
+	}
+
 	return wasi_otel_tracing.SpanContext{
 		TraceId:    s.TraceID().String(),
 		SpanId:     s.SpanID().String(),
-		TraceFlags: wasi_otel_tracing.TraceFlagsSampled,
+		TraceFlags: traceFlags,
 		IsRemote:   s.IsRemote(),
 		TraceState: traceState,
 	}

From 797cd2afbb1b851c2aed9e1a42f34b9d1eba4a58 Mon Sep 17 00:00:00 2001
From: Andrew Steurer <94206073+asteurer@users.noreply.github.com>
Date: Wed, 29 Apr 2026 15:34:13 -0500
Subject: [PATCH 2/2] fix: bug in metrics exemplars

Signed-off-by: Andrew Steurer <94206073+asteurer@users.noreply.github.com>
---
 go/metrics/conversions.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/go/metrics/conversions.go b/go/metrics/conversions.go
index 82b4b7a..02d3fe5 100644
--- a/go/metrics/conversions.go
+++ b/go/metrics/conversions.go
@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"encoding/hex"
 	"time"
 
 	"github.com/calebschoepp/opentelemetry-wasi/internal/wasi_clocks_wall_clock"
@@ -245,8 +246,8 @@ func toWasiExemplar[T float64 | int64](exemplars []metricdata.Exemplar[T]) []was
 			FilteredAttributes: types.ToWasiAttributes(e.FilteredAttributes),
 			Time:               types.ToWasiTime(e.Time),
 			Value:              toWasiMetricNumber(e.Value),
-			SpanId:             string(e.SpanID),
-			TraceId:            string(e.TraceID),
+			SpanId:             hex.EncodeToString(e.SpanID),
+			TraceId:            hex.EncodeToString(e.TraceID),
 		}
 	}