diff --git a/app/src/hooks/useTx.ts b/app/src/hooks/useTx.ts
new file mode 100644
index 0000000..9080460
--- /dev/null
+++ b/app/src/hooks/useTx.ts
@@ -0,0 +1,52 @@
+import {
+  pipe,
+  createTransactionMessage,
+  setTransactionMessageFeePayerSigner,
+  setTransactionMessageLifetimeUsingBlockhash,
+  appendTransactionMessageInstructions,
+  signTransactionMessageWithSigners,
+  sendAndConfirmTransactionFactory,
+  assertIsTransactionWithBlockhashLifetime,
+} from '@solana/kit'
+import { useKitTransactionSigner, useSolanaClient } from '@solana/connector/react'
+import { useQueryClient } from '@tanstack/react-query'
+import { useToast } from '@/components/ui/Toast'
+
+type AnyInstruction = Parameters<typeof appendTransactionMessageInstructions>[0][number]
+
+export function useTx() {
+  const { signer } = useKitTransactionSigner()
+  const { client } = useSolanaClient()
+  const queryClient = useQueryClient()
+  const toast = useToast()
+
+  return async (
+    instructions: AnyInstruction[],
+    invalidateKeys: string[][],
+    label: string,
+  ): Promise<void> => {
+    if (!signer || !client) throw new Error('Wallet not connected')
+    const { rpc, rpcSubscriptions } = client
+
+    const { value: latestBlockhash } = await rpc.getLatestBlockhash().send()
+
+    const txMsg = pipe(
+      createTransactionMessage({ version: 0 }),
+      (tx) => setTransactionMessageFeePayerSigner(signer, tx),
+      (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
+      (tx) => appendTransactionMessageInstructions(instructions, tx),
+    )
+
+    const signed = await signTransactionMessageWithSigners(txMsg)
+    assertIsTransactionWithBlockhashLifetime(signed)
+    await sendAndConfirmTransactionFactory({ rpc: rpc as never, rpcSubscriptions: rpcSubscriptions as never })(
+      signed as never,
+      { commitment: 'confirmed' },
+    )
+
+    toast(`Tx confirmed — ${label}`)
+    for (const key of invalidateKeys) {
+      queryClient.invalidateQueries({ queryKey: key })
+    }
+  }
+}