diff --git a/crates/sui-sdk-types/src/types/mod.rs b/crates/sui-sdk-types/src/types/mod.rs
index bad033ce3..12e97b862 100644
--- a/crates/sui-sdk-types/src/types/mod.rs
+++ b/crates/sui-sdk-types/src/types/mod.rs
@@ -136,9 +136,11 @@ pub use transaction::TransactionKind;
 pub use transaction::TransferObjects;
 pub use transaction::UnresolvedGasPayment;
 pub use transaction::UnresolvedInputArgument;
+pub use transaction::UnresolvedInputArgumentKind;
 pub use transaction::UnresolvedObjectReference;
 pub use transaction::UnresolvedProgrammableTransaction;
 pub use transaction::UnresolvedTransaction;
+pub use transaction::UnresolvedValue;
 pub use transaction::Upgrade;
 pub use transaction::VersionAssignment;
 pub use type_tag::Identifier;
diff --git a/crates/sui-sdk-types/src/types/transaction/mod.rs b/crates/sui-sdk-types/src/types/transaction/mod.rs
index 701957879..ce9e8d352 100644
--- a/crates/sui-sdk-types/src/types/transaction/mod.rs
+++ b/crates/sui-sdk-types/src/types/transaction/mod.rs
@@ -24,9 +24,11 @@ pub(crate) use serialization::SignedTransactionWithIntentMessage;
 mod unresolved;
 pub use unresolved::UnresolvedGasPayment;
 pub use unresolved::UnresolvedInputArgument;
+pub use unresolved::UnresolvedInputArgumentKind;
 pub use unresolved::UnresolvedObjectReference;
 pub use unresolved::UnresolvedProgrammableTransaction;
 pub use unresolved::UnresolvedTransaction;
+pub use unresolved::UnresolvedValue;
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 #[cfg_attr(test, derive(test_strategy::Arbitrary))]
diff --git a/crates/sui-sdk-types/src/types/transaction/unresolved.rs b/crates/sui-sdk-types/src/types/transaction/unresolved.rs
index 8acff69bd..f0ffbfdbf 100644
--- a/crates/sui-sdk-types/src/types/transaction/unresolved.rs
+++ b/crates/sui-sdk-types/src/types/transaction/unresolved.rs
@@ -11,10 +11,12 @@ use super::TransactionExpiration;
     feature = "serde",
     derive(serde_derive::Serialize, serde_derive::Deserialize)
 )]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct UnresolvedTransaction {
     #[cfg_attr(feature = "serde", serde(flatten))]
     pub ptb: UnresolvedProgrammableTransaction,
     pub sender: Address,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
     pub gas_payment: Option<UnresolvedGasPayment>,
     pub expiration: TransactionExpiration,
 }
@@ -23,6 +25,7 @@ pub struct UnresolvedTransaction {
     feature = "serde",
     derive(serde_derive::Serialize, serde_derive::Deserialize)
 )]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct UnresolvedProgrammableTransaction {
     pub inputs: Vec<UnresolvedInputArgument>,
     pub commands: Vec<Command>,
@@ -32,18 +35,33 @@ pub struct UnresolvedProgrammableTransaction {
     feature = "serde",
     derive(serde_derive::Serialize, serde_derive::Deserialize)
 )]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct UnresolvedGasPayment {
+    #[cfg_attr(
+        feature = "serde",
+        serde(default, skip_serializing_if = "Vec::is_empty")
+    )]
     pub objects: Vec<UnresolvedObjectReference>,
     pub owner: Address,
     #[cfg_attr(
         feature = "serde",
-        serde(with = "crate::_serde::OptionReadableDisplay")
+        serde(
+            with = "crate::_serde::OptionReadableDisplay",
+            default,
+            skip_serializing_if = "Option::is_none",
+        )
     )]
+    #[cfg_attr(feature = "schemars", schemars(with = "Option<crate::_schemars::U64>"))]
     pub price: Option<u64>,
     #[cfg_attr(
         feature = "serde",
-        serde(with = "crate::_serde::OptionReadableDisplay")
+        serde(
+            with = "crate::_serde::OptionReadableDisplay",
+            default,
+            skip_serializing_if = "Option::is_none",
+        )
     )]
+    #[cfg_attr(feature = "schemars", schemars(with = "Option<crate::_schemars::U64>"))]
     pub budget: Option<u64>,
 }
 
@@ -51,42 +69,122 @@ pub struct UnresolvedGasPayment {
     feature = "serde",
     derive(serde_derive::Serialize, serde_derive::Deserialize)
 )]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct UnresolvedObjectReference {
     pub object_id: ObjectId,
     #[cfg_attr(
         feature = "serde",
-        serde(with = "crate::_serde::OptionReadableDisplay")
+        serde(
+            with = "crate::_serde::OptionReadableDisplay",
+            default,
+            skip_serializing_if = "Option::is_none",
+        )
     )]
+    #[cfg_attr(feature = "schemars", schemars(with = "Option<crate::_schemars::U64>"))]
     pub version: Option<Version>,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
     pub digest: Option<ObjectDigest>,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde_derive::Serialize, serde_derive::Deserialize),
+    serde(rename_all = "snake_case")
+)]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+pub enum UnresolvedInputArgumentKind {
+    Pure,
+    Shared,
+    Receiving,
+    ImmutableOrOwned,
+    Immutable,
+    Owned,
+    Literal,
+}
+
+#[derive(Clone, Debug, Default, PartialEq, Eq)]
 #[cfg_attr(
     feature = "serde",
     derive(serde_derive::Serialize, serde_derive::Deserialize)
 )]
-pub enum UnresolvedInputArgument {
-    // contains no structs or objects
-    Pure {
-        #[cfg_attr(
-            feature = "serde",
-            serde(with = "::serde_with::As::<::serde_with::Bytes>")
-        )]
-        value: Vec<u8>,
-    },
-    // A Move object, either immutable, or owned mutable.
-    ImmutableOrOwned(UnresolvedObjectReference),
-    // A Move object that's shared.
-    // SharedObject::mutable controls whether caller asks for a mutable reference to shared object.
-    Shared {
-        object_id: ObjectId,
-        #[cfg_attr(
-            feature = "serde",
-            serde(with = "crate::_serde::OptionReadableDisplay")
-        )]
-        initial_shared_version: Option<u64>,
-        mutable: Option<bool>,
-    },
-    // A Move object that can be received in this transaction.
-    Receiving(UnresolvedObjectReference),
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+pub struct UnresolvedInputArgument {
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
+    pub kind: Option<UnresolvedInputArgumentKind>,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
+    pub value: Option<UnresolvedValue>,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
+    pub object_id: Option<ObjectId>,
+    /// Either the `initial_shared_version` if object is a shared object, or the `version` if
+    /// this is an owned object
+    #[cfg_attr(
+        feature = "serde",
+        serde(
+            with = "crate::_serde::OptionReadableDisplay",
+            default,
+            skip_serializing_if = "Option::is_none",
+            alias = "initial_shared_version",
+        )
+    )]
+    #[cfg_attr(feature = "schemars", schemars(with = "Option<crate::_schemars::U64>"))]
+    pub version: Option<Version>,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
+    pub digest: Option<ObjectDigest>,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none",))]
+    pub mutable: Option<bool>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde_derive::Serialize, serde_derive::Deserialize),
+    serde(try_from = "serde_json::Value", into = "serde_json::Value")
+)]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema), schemars(untagged))]
+pub enum UnresolvedValue {
+    Null,
+    Bool(bool),
+    Number(u64),
+    String(String),
+    Array(Vec<UnresolvedValue>),
+}
+
+#[cfg(feature = "serde")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "serde")))]
+impl TryFrom<serde_json::Value> for UnresolvedValue {
+    type Error = &'static str;
+
+    fn try_from(value: serde_json::Value) -> Result<Self, Self::Error> {
+        let v = match value {
+            serde_json::Value::Null => Self::Null,
+            serde_json::Value::Bool(b) => Self::Bool(b),
+            serde_json::Value::Number(n) => {
+                Self::Number(n.as_u64().ok_or("expected unsigned integer")?)
+            }
+            serde_json::Value::String(s) => Self::String(s),
+            serde_json::Value::Array(a) => Self::Array(
+                a.into_iter()
+                    .map(Self::try_from)
+                    .collect::<Result<_, _>>()?,
+            ),
+            serde_json::Value::Object(_) => return Err("objects are not supported"),
+        };
+
+        Ok(v)
+    }
+}
+
+#[cfg(feature = "serde")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "serde")))]
+impl From<UnresolvedValue> for serde_json::Value {
+    fn from(value: UnresolvedValue) -> Self {
+        match value {
+            UnresolvedValue::Null => Self::Null,
+            UnresolvedValue::Bool(b) => Self::Bool(b),
+            UnresolvedValue::Number(n) => Self::Number(n.into()),
+            UnresolvedValue::String(s) => Self::String(s),
+            UnresolvedValue::Array(a) => Self::Array(a.into_iter().map(Into::into).collect()),
+        }
+    }
 }