Skip serializing empty fields

docs/src/developing/clients/jsonrpc-api.md

@@ -433,10 +433,10 @@ The result field will be an object with the following fields:
       - `fee: <u64>` - fee this transaction was charged, as u64 integer
       - `preBalances: <array>` - array of u64 account balances from before the transaction was processed
       - `postBalances: <array>` - array of u64 account balances after the transaction was processed
-      - `innerInstructions: <array|null>` - List of [inner instructions](#inner-instructions-structure) or `null` if inner instruction recording was not enabled during this transaction
+      - `innerInstructions: <array|undefined>` - List of [inner instructions](#inner-instructions-structure) or `null` if inner instruction recording was not enabled during this transaction
       - `preTokenBalances: <array|undefined>` - List of [token balances](#token-balances-structure) from before the transaction was processed or omitted if token balance recording was not yet enabled during this transaction
       - `postTokenBalances: <array|undefined>` - List of [token balances](#token-balances-structure) from after the transaction was processed or omitted if token balance recording was not yet enabled during this transaction
-      - `logMessages: <array|null>` - array of string log messages or `null` if log message recording was not enabled during this transaction
+      - `logMessages: <array|undefined>` - array of string log messages or `null` if log message recording was not enabled during this transaction
       - DEPRECATED: `status: <object>` - Transaction status
         - `"Ok": <null>` - Transaction was successful
         - `"Err": <ERR>` - Transaction failed with TransactionError
@@ -445,7 +445,7 @@ The result field will be an object with the following fields:
         - `readonly: <array[string]>` - Ordered list of base-58 encoded addresses for readonly loaded accounts
     - `version: <"legacy"|number|undefined>` - Transaction version. Undefined if `maxSupportedTransactionVersion` is not set in request params.
   - `signatures: <array>` - present if "signatures" are requested for transaction details; an array of signatures strings, corresponding to the transaction order in the block
-  - `rewards: <array>` - present if rewards are requested; an array of JSON objects containing:
+  - `rewards: <array|undefined>` - present if rewards are requested; an array of JSON objects containing:
     - `pubkey: <string>` - The public key, as base-58 encoded string, of the account that received the reward
     - `lamports: <i64>`- number of reward lamports credited or debited by the account, as a i64
     - `postBalance: <u64>` - account balance in lamports after the reward was applied

transaction-status/src/lib.rs

@@ -326,13 +326,17 @@ pub struct UiTransactionStatusMeta {
     pub fee: u64,
     pub pre_balances: Vec<u64>,
     pub post_balances: Vec<u64>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inner_instructions: Option<Vec<UiInnerInstructions>>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub log_messages: Option<Vec<String>>,
     pub pre_token_balances: Option<Vec<UiTransactionTokenBalance>>,
     pub post_token_balances: Option<Vec<UiTransactionTokenBalance>>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub rewards: Option<Rewards>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub loaded_addresses: Option<UiLoadedAddresses>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub return_data: Option<TransactionReturnData>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub compute_units_consumed: Option<u64>,