Speed up solana transaction confirmation

.changeset/rich-lizards-reply.md

@@ -0,0 +1,5 @@
+---
+'@relayprotocol/relay-svm-wallet-adapter': patch
+---
+
+Poll for signature instead of waiting for confirmation

packages/relay-svm-wallet-adapter/src/adapter.ts

@@ -122,24 +122,44 @@ export const adaptSolanaWallet = (
       // So we don't need to handle onReplaced and onCancelled
       assertBase58TransactionSignature(txHash)
 
-      const { blockhash, lastValidBlockHeight } =
-        await connection.getLatestBlockhash('confirmed')
+      const INITIAL_INTERVAL_MS = 200
+      const MAX_INTERVAL_MS = 1000
+      const MAX_POLL_DURATION_MS = 120_000
+      const start = Date.now()
+      let attempt = 0
 
-      const result = await connection.confirmTransaction({
-        blockhash: blockhash,
-        lastValidBlockHeight: lastValidBlockHeight,
-        signature: txHash
-      })
+      while (Date.now() - start < MAX_POLL_DURATION_MS) {
+        const { value } = await connection.getSignatureStatuses([txHash], {
+          searchTransactionHistory: attempt >= 5
+        })
+        const status = value?.[0]
 
-      if (result.value.err) {
-        throw new Error(`Transaction failed: ${result.value.err}`)
-      }
+        if (status?.err) {
+          throw new Error(`Transaction failed: ${JSON.stringify(status.err)}`)
+        }
+
+        if (
+          status?.confirmationStatus === 'confirmed' ||
+          status?.confirmationStatus === 'finalized'
+        ) {
+          return {
+            blockHash: status.slot.toString(),
+            blockNumber: status.slot,
+            txHash
+          }
+        }
 
-      return {
-        blockHash: result.context.slot.toString(),
-        blockNumber: result.context.slot,
-        txHash
+        const interval = Math.min(
+          INITIAL_INTERVAL_MS * Math.pow(2, attempt),
+          MAX_INTERVAL_MS
+        )
+        await new Promise((resolve) => setTimeout(resolve, interval))
+        attempt++
       }
+
+      throw new Error(
+        `Transaction confirmation timeout: ${txHash} was not confirmed within ${MAX_POLL_DURATION_MS / 1000}s`
+      )
     },
     switchChain: (chainId: number) => {
       _chainId = chainId