Version that works for both JS and Native

disneystreaming · Dec 11, 2024 · 7f20f9b · 7f20f9b
1 parent 9b1201f
commit 7f20f9b
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Showing 2 changed files with 18 additions and 10 deletions.
diff --git a/modules/core/src/smithy4s/internals/DocumentEncoderSchemaVisitor.scala b/modules/core/src/smithy4s/internals/DocumentEncoderSchemaVisitor.scala
@@ -105,11 +105,16 @@ class DocumentEncoderSchemaVisitor(
         case EPOCH_SECONDS =>
           ts =>
             DNumber(
-              BigDecimal(ts.epochSecond) + BigDecimal(
-                ts.nano * 1 / 1000000000.0
-              )
-                .underlying()
-                .stripTrailingZeros()
+              BigDecimal({
+                val es = java.math.BigDecimal.valueOf(ts.epochSecond)
+                if (ts.nano == 0) es
+                else
+                  es.add(
+                    java.math.BigDecimal
+                      .valueOf(ts.nano.toLong, 9)
+                      .stripTrailingZeros
+                  )
+              })
             )
       }
     case PDocument => from(identity)

diff --git a/modules/json/src/smithy4s/json/internals/SchemaVisitorJCodec.scala b/modules/json/src/smithy4s/json/internals/SchemaVisitorJCodec.scala
@@ -394,11 +394,14 @@ private[smithy4s] class SchemaVisitorJCodec(
       }
 
       def encodeValue(x: Timestamp, out: JsonWriter): Unit = {
-        out.writeVal(
-          BigDecimal(x.epochSecond) + BigDecimal(x.nano * 1 / 1000000000.0)
-            .underlying()
-            .stripTrailingZeros()
-        )
+        out.writeVal(BigDecimal({
+          val es = java.math.BigDecimal.valueOf(x.epochSecond)
+          if (x.nano == 0) es
+          else
+            es.add(
+              java.math.BigDecimal.valueOf(x.nano.toLong, 9).stripTrailingZeros
+            )
+        }))
       }
 
       def decodeKey(in: JsonReader): Timestamp = {