fix: enabled value for convert to string or int

src/model.rs

@@ -2,11 +2,16 @@ use std::fmt::Display;
 
 use merge::Merge;
 
-use serde::{de::Error as DeError, Deserialize, Deserializer, Serialize, Serializer};
+use serde::{
+    de::{Error as DeError, Visitor},
+    Deserialize, Deserializer, Serialize, Serializer,
+};
 use serde_json::Value as JsonValue;
 
 use strum_macros::Display;
 
+const JSON_MAX_SAFE_INTERGER: i128 = 9007199254740991;
+
 // We're duplicating the Era struct from Pallas for two reasons: a) we need it
 // to be serializable and we don't want to impose serde dependency on Pallas and
 // b) we prefer not to add dependencies to Pallas outside of the sources that
@@ -381,13 +386,48 @@ fn serialize_int_scalar<S>(value: &i128, serializer: S) -> Result<S::Ok, S::Erro
 where
     S: Serializer,
 {
-    value.to_string().serialize(serializer)
+    if *value > JSON_MAX_SAFE_INTERGER || *value < -JSON_MAX_SAFE_INTERGER {
+        return value.to_string().serialize(serializer);
+    }
+
+    value.serialize(serializer)
 }
 
 fn deserialize_int_scalar<'de, D>(deserializer: D) -> Result<i128, D::Error>
 where
     D: Deserializer<'de>,
 {
-    let value: String = Deserialize::deserialize(deserializer)?;
-    Ok(value.parse().map_err(DeError::custom)?)
+    deserializer.deserialize_any(IntScalarVisitor)
+}
+
+#[derive(Debug)]
+struct IntScalarVisitor;
+impl<'de> Visitor<'de> for IntScalarVisitor {
+    type Value = i128;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        dbg!(self);
+        formatter.write_str("expect to receive integer")
+    }
+
+    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(v.parse().map_err(DeError::custom)?)
+    }
+
+    fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(v as i128)
+    }
+
+    fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(v as i128)
+    }
 }