[graphql/rpc] change expiration field in tx block (#14147)

## Description 

Use the available data for the expiration field instead of using the get
last system state.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

crates/sui-graphql-rpc/src/context_data/db_data_provider.rs

@@ -43,7 +43,7 @@ use sui_sdk::types::{
         CheckpointCommitment, CheckpointDigest, EndOfEpochData as NativeEndOfEpochData,
     },
     object::{Data, Object as SuiObject},
-    transaction::{SenderSignedData, TransactionDataAPI},
+    transaction::{SenderSignedData, TransactionDataAPI, TransactionExpiration},
 };
 
 #[derive(thiserror::Error, Debug, Eq, PartialEq)]
@@ -869,12 +869,18 @@ impl TryFrom<StoredTransaction> for TransactionBlock {
             ))),
         }?;
 
+        let epoch_id = match sender_signed_data.intent_message().value.expiration() {
+            TransactionExpiration::None => None,
+            TransactionExpiration::Epoch(epoch_id) => Some(*epoch_id),
+        };
+
         Ok(Self {
             digest,
             effects,
             sender: Some(sender),
             bcs: Some(Base64::from(&tx.raw_transaction)),
             gas_input: Some(gas_input),
+            epoch_id,
         })
     }
 }

crates/sui-graphql-rpc/src/types/transaction_block.rs

@@ -2,7 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
 use crate::context_data::{
-    context_ext::DataProviderContextExt, sui_sdk_data_provider::convert_to_epoch,
+    context_ext::DataProviderContextExt, db_data_provider::PgManager,
+    sui_sdk_data_provider::convert_to_epoch,
 };
 
 use super::{
@@ -28,6 +29,8 @@ pub(crate) struct TransactionBlock {
     pub sender: Option<Address>,
     pub bcs: Option<Base64>,
     pub gas_input: Option<GasInput>,
+    #[graphql(skip)]
+    pub epoch_id: Option<u64>,
 }
 
 impl From<SuiTransactionBlockResponse> for TransactionBlock {
@@ -44,6 +47,7 @@ impl From<SuiTransactionBlockResponse> for TransactionBlock {
             sender,
             bcs: Some(Base64::from(&tx_block.raw_transaction)),
             gas_input,
+            epoch_id: None,
         }
     }
 }
@@ -55,16 +59,17 @@ impl TransactionBlock {
     }
 
     async fn expiration(&self, ctx: &Context<'_>) -> Result<Option<Epoch>> {
-        if self.effects.is_none() {
-            return Ok(None);
+        match self.epoch_id {
+            None => Ok(None),
+            Some(epoch_id) => {
+                let epoch = ctx
+                    .data_unchecked::<PgManager>()
+                    .fetch_epoch_strict(epoch_id)
+                    .await
+                    .extend()?;
+                Ok(Some(epoch))
+            }
         }
-        let gcs = self.effects.as_ref().unwrap().gas_effects.gcs;
-        // TODO: implement DB counterpart without using Sui SDK client
-        let data_provider = ctx.data_provider();
-        let system_state = data_provider.get_latest_sui_system_state().await?;
-        let protocol_configs = data_provider.fetch_protocol_config(None).await?;
-        let epoch = convert_to_epoch(gcs, &system_state, &protocol_configs)?;
-        Ok(Some(epoch))
     }
 }