Is there any way to cancel a swap after the deposit transaction has been broadcast

07 September 2026

No, you cannot cancel a swap once the deposit transaction has been broadcast. The swap is designed to execute automatically once the network confirms your deposit, and the exchanger has no mechanism to reverse or cancel a transaction that has already been sent to the blockchain.

Here is why cancellation is impossible after broadcast.

The swap works as a sequence of two on-chain transactions. You send coins to an address the exchanger provides. The exchanger watches the blockchain for that deposit. Once it sees enough confirmations, it sends the output coins to your destination address. The critical point is that the first transaction - your deposit - is broadcast to a public, permissionless network. Once broadcast, it cannot be recalled. The exchanger does not control your wallet, and it does not control the network. It simply waits for the deposit to confirm.

Some people ask: what if I send the deposit with a very low gas fee and the transaction stays in the mempool for hours? Could I cancel it then? You could try to replace the transaction with a higher fee (if your wallet supports Replace-by-Fee) or with a nonce-based cancellation transaction. But those actions happen on your side, before the deposit confirms. They do not cancel the swap. They cancel your attempt to send the deposit. The swap itself never started, because the deposit never confirmed. That is a different situation from a swap that is already running.

Once the deposit confirms, the exchanger sees it. The swap moves to the next stage. The exchanger may then broadcast the output transaction. At that point, the output transaction is also on the blockchain and cannot be cancelled. The entire swap is a sequence of irreversible steps.

There is no "cancel button" on the exchanger's side. The service is designed to be trustless: it does not hold your coins in a custodial wallet that it could return to you on request. It forwards them. The moment your deposit confirms, the exchanger's software begins processing. Stopping that process mid-way would require the exchanger to hold private keys that could reverse blockchain transactions. No legitimate service has that ability. Any service that claims it can reverse a confirmed transaction is lying.

If your deposit transaction is stuck in the mempool with a low fee and you want to stop the swap before it starts, you have a narrow window. You can try to accelerate it (which does not cancel, but finishes it faster) or replace/cancel it on your end. But the moment the deposit confirms, the swap is committed. The exchanger will send the output. You cannot get your deposit back.

This is exactly the kind of situation covered under the hub page "Why your swap is stuck and what to do." If your deposit is stuck in the mempool, you are not yet in a running swap - you are in a pre-swap state where you still have options. If the swap is already running and you are waiting for the output, there is nothing to cancel. The only action is to wait, check the block explorer, and understand that the network - not the exchanger - controls the timing.

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