A pending Avalanche swap is a signed transaction waiting to be included on the C-Chain. Whether you should retry depends on its on-chain status: sending it again before checking can leave two swaps competing to execute.
Start with the transaction hash in a C-Chain block explorer or your wallet’s transaction history. If there is no receipt, it has not been included in a block; if the receipt shows status 0, it was included but failed; status 1 means it succeeded. Ethereum JSON-RPC documentation defines these receipt statuses for EVM chains such as Avalanche C-Chain.
A pending transaction may be waiting because its gas price is unattractive, or because an earlier transaction from the same wallet has a lower nonce. A nonce is the account’s transaction sequence number, and later transactions generally wait behind an earlier pending one. If you started a swap through Blackhole swap, check the transaction itself on the C-Chain before deciding what to do in the swap service.
If the transaction remains pending, wait or use your wallet’s speed-up option to resubmit that same transaction with a higher fee. A replacement or cancellation uses the same nonce and must offer a competitive fee; cancellation is only possible while the original is still pending. Avalanche Support explains this nonce-based approach for stuck C-Chain transactions. Don’t submit a fresh swap just because the first one looks slow.
If the receipt shows failure, the swap did not complete, but the transaction may still have spent AVAX on gas. Check the reason if your wallet or explorer provides it. For example, the price may have moved beyond the swap’s slippage limit while it waited. Once the failed transaction is confirmed and your balance reflects the gas cost, review the quote and slippage before starting again through Blackhole swap. Keep enough AVAX for the next transaction’s network fee.
If status is 1 but the swap page still looks unchanged, check the token balances for the same C-Chain address and allow the interface time to refresh. A successful receipt is stronger evidence than a stale display. A swap that reverts normally leaves the swap’s token balances unchanged, though gas is charged; a separate earlier approval transaction can still have succeeded.
There is no fixed wait time that guarantees a transaction is stuck. Check whether the transaction remains pending and compare its fee with current network conditions. If it is only a short delay, waiting avoids an unnecessary replacement. If it has been pending through several block updates, a speed-up may help, provided your wallet offers that option.
The failed transaction can consume gas, and a new attempt is a separate transaction with its own possible gas cost. Confirm the first transaction’s receipt before retrying. If the original is still pending, a new transaction may execute as well; replacing it with the same nonce is different from submitting another swap with a new nonce.
A missing result alone does not prove the transaction was dropped. Check that the explorer is set to Avalanche C-Chain and that the hash is copied correctly, then check the wallet’s transaction status and nonce. If the wallet still lists it as pending, avoid a fresh swap until it confirms, is replaced, or is otherwise resolved.
Check the receipt first; retry only when the original transaction’s outcome is clear.