fixed address normalizatoin

api/gateway/chain/internal/service/gateway/commands/transfer/destination.go

@@ -59,6 +59,7 @@ func resolveDestination(ctx context.Context, deps Deps, dest *chainv1.TransferDe
 	}
 	return model.TransferDestination{
 		ExternalAddress:         normalized,
+		ExternalAddressOriginal: external,
 		Memo:                    strings.TrimSpace(dest.GetMemo()),
 	}, nil
 }

api/gateway/chain/storage/model/transfer.go

@@ -30,6 +30,7 @@ type ServiceFee struct {
 type TransferDestination struct {
 	ManagedWalletRef        string `bson:"managedWalletRef,omitempty" json:"managedWalletRef,omitempty"`
 	ExternalAddress         string `bson:"externalAddress,omitempty" json:"externalAddress,omitempty"`
+	ExternalAddressOriginal string `bson:"externalAddressOriginal,omitempty" json:"externalAddressOriginal,omitempty"`
 	Memo                    string `bson:"memo,omitempty" json:"memo,omitempty"`
 }
 
@@ -85,7 +86,8 @@ func (t *Transfer) Normalize() {
 	t.TokenSymbol = strings.TrimSpace(strings.ToUpper(t.TokenSymbol))
 	t.ContractAddress = strings.TrimSpace(strings.ToLower(t.ContractAddress))
 	t.Destination.ManagedWalletRef = strings.TrimSpace(t.Destination.ManagedWalletRef)
-	t.Destination.ExternalAddress = strings.TrimSpace(strings.ToLower(t.Destination.ExternalAddress))
+	t.Destination.ExternalAddress = normalizeWalletAddress(t.Destination.ExternalAddress)
+	t.Destination.ExternalAddressOriginal = strings.TrimSpace(t.Destination.ExternalAddressOriginal)
 	t.Destination.Memo = strings.TrimSpace(t.Destination.Memo)
 	t.ClientReference = strings.TrimSpace(t.ClientReference)
 }

api/gateway/chain/storage/model/transfer_test.go

@@ -0,0 +1,50 @@
+package model
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestTransferNormalizePreservesBase58ExternalAddress(t *testing.T) {
+	address := "TGBDXEg9rxSqGFJDcb889zqTjDwx1bmLRF"
+	transfer := &Transfer{
+		IdempotencyKey:  "idemp",
+		TransferRef:     "ref",
+		OrganizationRef: "org",
+		SourceWalletRef: "wallet",
+		Network:         "tron_mainnet",
+		TokenSymbol:     "USDT",
+		Destination: TransferDestination{
+			ExternalAddress:         address,
+			ExternalAddressOriginal: address,
+		},
+	}
+
+	transfer.Normalize()
+
+	if transfer.Destination.ExternalAddress != address {
+		t.Fatalf("expected external address to preserve case, got %q", transfer.Destination.ExternalAddress)
+	}
+	if transfer.Destination.ExternalAddressOriginal != address {
+		t.Fatalf("expected external address original to preserve case, got %q", transfer.Destination.ExternalAddressOriginal)
+	}
+}
+
+func TestTransferNormalizeLowercasesHexExternalAddress(t *testing.T) {
+	address := "0xAABBCCDDEEFF00112233445566778899AABBCCDD"
+	transfer := &Transfer{
+		Destination: TransferDestination{
+			ExternalAddress:         address,
+			ExternalAddressOriginal: address,
+		},
+	}
+
+	transfer.Normalize()
+
+	if transfer.Destination.ExternalAddress != strings.ToLower(address) {
+		t.Fatalf("expected hex external address to be lowercased, got %q", transfer.Destination.ExternalAddress)
+	}
+	if transfer.Destination.ExternalAddressOriginal != address {
+		t.Fatalf("expected external address original to preserve case, got %q", transfer.Destination.ExternalAddressOriginal)
+	}
+}