Blackhole Swap retries start with the transaction status

Retry a blackhole swap only after Ethereum confirms the first transaction failed; a pending transaction can still execute. Blackhole Swap’s interface lists DAI and USDC swaps on Ethereum, where a submitted transaction is recorded on-chain and paid for in ETH. Its published swap details include the output estimate and minimum received, which sets the slippage limit.

How do I check whether a blackhole swap failed?

Use the transaction hash in an Ethereum block explorer and check its status. Ethereum’s glossary defines a pending transaction as one awaiting inclusion in a block; it may still be included, replaced, or dropped. A wallet’s timeout or an error in the page does not by itself establish that the transaction failed.

Blackhole Swap says its swaps require wallet approval and Ethereum gas. If the public record shows the transaction succeeded, check the receiving token balance before doing anything else: a completed swap may not be reflected immediately in the page. If it shows a confirmed failure, the swap did not complete, though Ethereum still charges gas for processing a failed transaction.

What should I do if the transaction is still pending?

Wait for the original transaction to resolve before submitting another swap. Ethereum’s public guidance says wallets may offer a speed-up that resubmits the same transaction with a higher gas fee, or a cancellation using the same nonce; both actions require wallet authorization and neither guarantees success before confirmation.

Do not start a second swap simply because the first is slow. If both transactions execute, you could trade twice. If the wallet offers replacement controls, inspect the original transaction and replacement details carefully before signing; when uncertain, wait or consult the wallet’s support materials.

How can I retry after a confirmed failure?

After the explorer marks the first transaction failed, reopen blackhole swap and reconnect the same Ethereum wallet. Check that the input balance is available, since a reverted swap returns the token amount but does not refund gas. Review the pair, amount, quoted rate and minimum received before approving a new transaction.

• Confirm the wallet is on Ethereum and the pair is DAI to USDC or USDC to DAI, as listed by Blackhole Swap.
• Keep enough ETH in the wallet for gas; Blackhole Swap identifies ETH as the fee token.
• Recheck the quote and slippage limit. The site says the minimum received reflects that limit, while the actual output can change with price and liquidity.
• Approve only the intended swap in the wallet, then save its new transaction hash to check status.

The safest retry is a fresh, reviewed transaction after the first has a confirmed failure status. Blackhole Swap’s published materials describe its supported pair and fee mechanics; they do not establish the cause of any individual failed transaction. The cause remains unconfirmed until the transaction record or wallet diagnostics identify it.