2 files changed, 27 insertions, 9 deletions
diff --git a/taler-kotlin-android/src/main/java/net/taler/common/ContractTerms.kt b/taler-kotlin-android/src/main/java/net/taler/common/ContractTerms.kt
index 0d5fe5b..013427f 100644
--- a/taler-kotlin-android/src/main/java/net/taler/common/ContractTerms.kt
+++ b/taler-kotlin-android/src/main/java/net/taler/common/ContractTerms.kt
@@ -19,7 +19,6 @@ package net.taler.common
 import androidx.annotation.RequiresApi
 import com.fasterxml.jackson.annotation.JsonIgnore
 import com.fasterxml.jackson.annotation.JsonInclude
-import com.fasterxml.jackson.annotation.JsonInclude.Include.NON_EMPTY
 import com.fasterxml.jackson.annotation.JsonInclude.Include.NON_NULL
 import com.fasterxml.jackson.annotation.JsonProperty
 import kotlinx.serialization.SerialName
@@ -81,11 +80,3 @@ data class ContractProduct(
 data class ContractMerchant(
     val name: String
 )
-
-@Serializable
-@JsonInclude(NON_EMPTY)
-class Timestamp(
-    @SerialName("t_ms")
-    @JsonProperty("t_ms")
-    val ms: Long
-)
diff --git a/taler-kotlin-android/src/main/java/net/taler/common/TimestampMixin.kt b/taler-kotlin-android/src/main/java/net/taler/common/TimestampMixin.kt
new file mode 100644
index 0000000..28dbe7f
--- /dev/null
+++ b/taler-kotlin-android/src/main/java/net/taler/common/TimestampMixin.kt
@@ -0,0 +1,27 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.common
+
+import com.fasterxml.jackson.annotation.JsonProperty
+
+/**
+ * Used to support Jackson serialization along with KotlinX.
+ */
+abstract class TimestampMixin(
+    @get:JsonProperty("t_ms")
+    val ms: Long
+)