Provide cancel txn via api

[baymac]

If user initiates txn signing and returns to the DApp and navigates to a different location DApp would want to cancel the txn via api. Is there a challenge exposing cancel api?

[alessandrokonrad]

You mean cancelling a submitted transaction to the network? That is not possible.

[baymac]

@alessandrokonrad I mean cancelling transaction before it is signed and submitted. For ref:

Is it possible to cancel the transaction at this stage from the dapp itself?

[rooooooooob]

@baymac

Is it possible to cancel the transaction at this stage from the dapp itself?

Do you mean like the dApp sends, say, cardano.cancelTx(txIdhere) and then if the tx sign box is open it auto-closes the pop-up? If so, then it's not possible under the CIP-0030 bridge spec.

The dApp would have to just ignore the signed tx returned (or the user cancelled error) returned when the user closes the tx sign box or presses Cancel/Sign in it.

Can you elaborate on your exact use case? Why is the dApp asking the user to sign a TX and then changing its mind before the user can sign it or refuse it?

If you think this is an important use-case then feel free to leave a comment on CIP-0030's initial merge PR to get a discussion started. It didn't come up in any of the discussion before in the spec. Otherwise you'll just have to tell the user they should cancel it or simply ignore whatever output is in it if you no longer want the user to sign it.