From 208f48ce370e23ab6ac77b6f31335efe6122732a Mon Sep 17 00:00:00 2001
From: Shawn Reuland <shawn@stellar.org>
Date: Tue, 24 Oct 2023 11:40:42 -0700
Subject: [PATCH] #4909: follow xdr Asset for String serialization of loader
 AssetKey

---
 .../internal/db2/history/asset_loader.go      |  3 +++
 .../internal/db2/history/asset_loader_test.go | 22 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/services/horizon/internal/db2/history/asset_loader.go b/services/horizon/internal/db2/history/asset_loader.go
index e54319af12..39703d530f 100644
--- a/services/horizon/internal/db2/history/asset_loader.go
+++ b/services/horizon/internal/db2/history/asset_loader.go
@@ -23,6 +23,9 @@ type AssetKey struct {
 }
 
 func (key AssetKey) String() string {
+	if key.Type == xdr.AssetTypeToString[xdr.AssetTypeAssetTypeNative] {
+		return key.Type
+	}
 	return key.Type + "/" + key.Code + "/" + key.Issuer
 }
 
diff --git a/services/horizon/internal/db2/history/asset_loader_test.go b/services/horizon/internal/db2/history/asset_loader_test.go
index c7458c7789..d67163d764 100644
--- a/services/horizon/internal/db2/history/asset_loader_test.go
+++ b/services/horizon/internal/db2/history/asset_loader_test.go
@@ -12,6 +12,28 @@ import (
 	"github.com/stellar/go/xdr"
 )
 
+func TestAssetKeyToString(t *testing.T) {
+	num4key := AssetKey{
+		Type:   "credit_alphanum4",
+		Code:   "USD",
+		Issuer: "A1B2C3",
+	}
+
+	num12key := AssetKey{
+		Type:   "credit_alphanum12",
+		Code:   "USDABC",
+		Issuer: "A1B2C3",
+	}
+
+	nativekey := AssetKey{
+		Type: "native",
+	}
+
+	assert.Equal(t, num4key.String(), "credit_alphanum4/USD/A1B2C3")
+	assert.Equal(t, num12key.String(), "credit_alphanum12/USDABC/A1B2C3")
+	assert.Equal(t, nativekey.String(), "native")
+}
+
 func TestAssetLoader(t *testing.T) {
 	tt := test.Start(t)
 	defer tt.Finish()