feat: SVM agents - use the transaction submission URL for polling tx …

…status (#5298)

### Description

- context:
https://discord.com/channels/935678348330434570/1333035743622336614
- uses the RPC URL used for tx submission (if it's possible) to poll tx
status. We use a Helius tx submission URL on solana mainnet so this now
uses Helius for polling the status as well

### Drive-by changes

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Are there any minor or drive-by changes also included?
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### Related issues

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- Fixes #[issue number here]
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### Backward compatibility

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implications, e.g. changes that would prohibit deploying older commits
using this infra tooling?

Yes/No
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### Testing

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What kind of testing have these changes undergone?

None/Manual/Unit Tests
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rust/main/chains/hyperlane-sealevel/src/mailbox.rs

@@ -490,17 +490,18 @@ impl Mailbox for SealevelMailbox {
 
         let send_instant = std::time::Instant::now();
 
+        let rpc = self.tx_submitter.rpc_client().unwrap_or_else(|| self.rpc());
+
         // Wait for the transaction to be confirmed.
-        self.rpc().wait_for_transaction_confirmation(&tx).await?;
+        rpc.wait_for_transaction_confirmation(&tx).await?;
 
         // We expect time_to_confirm to fluctuate depending on the commitment level when submitting the
         // tx, but still use it as a proxy for tx latency to help debug.
         tracing::info!(?tx, ?signature, time_to_confirm=?send_instant.elapsed(), "Sealevel transaction confirmed");
 
         // TODO: not sure if this actually checks if the transaction was executed / reverted?
         // Confirm the transaction.
-        let executed = self
-            .rpc()
+        let executed = rpc
             .confirm_transaction_with_commitment(&signature, commitment)
             .await
             .map_err(|err| warn!("Failed to confirm inbox process transaction: {}", err))

rust/main/chains/hyperlane-sealevel/src/tx_submitter.rs

@@ -24,6 +24,10 @@ pub trait TransactionSubmitter: Send + Sync {
         transaction: &Transaction,
         skip_preflight: bool,
     ) -> ChainResult<Signature>;
+
+    fn rpc_client(&self) -> Option<&SealevelRpcClient> {
+        None
+    }
 }
 
 /// A transaction submitter that uses the vanilla RPC to submit transactions.
@@ -60,6 +64,10 @@ impl TransactionSubmitter for RpcTransactionSubmitter {
             .send_transaction(transaction, skip_preflight)
             .await
     }
+
+    fn rpc_client(&self) -> Option<&SealevelRpcClient> {
+        Some(&self.rpc_client)
+    }
 }
 
 /// A transaction submitter that uses the Jito API to submit transactions.

typescript/infra/config/environments/mainnet3/agent.ts

@@ -671,7 +671,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: 'f6b682c-20250124-144126',
+      tag: 'a54c98e-20250126-113529',
     },
     blacklist,
     gasPaymentEnforcement: gasPaymentEnforcement,