fix: unify logic of getting finalized tipset

src/rpc/methods/chain.rs

@@ -167,58 +167,10 @@ impl RpcMethod<0> for ChainGetFinalizedTipset {
         (): Self::Params,
         _: &http::Extensions,
     ) -> Result<Self::Ok, ServerError> {
-        let head = ctx.chain_store().heaviest_tipset();
-        let ec_finality_epoch = (head.epoch() - ctx.chain_config().policy.chain_finality).max(0);
-
-        // Either get the f3 finalized tipset or the ec finalized tipset
-        match get_f3_finality_tipset(&ctx, ec_finality_epoch).await {
-            Ok(f3_tipset) => {
-                tracing::debug!("Using F3 finalized tipset at epoch {}", f3_tipset.epoch());
-                Ok(f3_tipset)
-            }
-            Err(_) => {
-                // fallback to ec finality
-                tracing::warn!("F3 finalization unavailable, falling back to EC finality");
-                let ec_tipset = ctx.chain_index().tipset_by_height(
-                    ec_finality_epoch,
-                    head,
-                    ResolveNullTipset::TakeOlder,
-                )?;
-                Ok(ec_tipset)
-            }
-        }
+        Ok(ChainGetTipSetV2::get_latest_finalized_tipset(&ctx).await?)
     }
 }
 
-// get f3 finalized tipset based on ec finality epoch
-async fn get_f3_finality_tipset<DB: Blockstore + Sync + Send + 'static>(
-    ctx: &Ctx<DB>,
-    ec_finality_epoch: ChainEpoch,
-) -> Result<Tipset> {
-    let f3_finalized_cert = crate::rpc::f3::F3GetLatestCertificate::get()
-        .await
-        .map_err(|e| anyhow::anyhow!("Failed to get F3 certificate: {}", e))?;
-
-    let f3_finalized_head = f3_finalized_cert.chain_head();
-    if f3_finalized_head.epoch < ec_finality_epoch {
-        return Err(anyhow::anyhow!(
-            "F3 finalized tipset epoch {} is further back than EC finalized tipset epoch {}",
-            f3_finalized_head.epoch,
-            ec_finality_epoch
-        ));
-    }
-
-    ctx.chain_index()
-        .load_required_tipset(&f3_finalized_head.key)
-        .map_err(|e| {
-            anyhow::anyhow!(
-                "Failed to load F3 finalized tipset at epoch {}: {}",
-                f3_finalized_head.epoch,
-                e
-            )
-        })
-}
-
 pub enum ChainGetMessage {}
 impl RpcMethod<1> for ChainGetMessage {
     const NAME: &'static str = "Filecoin.ChainGetMessage";