[Private transactions] Public wrapper contract: emit an event on successful private state change with the initiator's address?

[ngyam]

Hi all,

Is it possible to add an Event that gets emitted on a state change of the private contract?
Is it possible to know the address who initiated the state change (the caller of private_sendTransaction). What about including the initiator address in such an event?

Might be related to this other issue I already opened.

[jam10o-new]

This would be a fairly trivial change in the contract code (add the event call after the state change occurs) https://github.com/parity-contracts/private-tx/blob/master/contracts/PrivateContract.sol and you can easily deploy your own version of the contract instead of the one provided by Parity if you want to have this functionality now.

[ngyam]

Neat, can you show me an example to do that? The examples are shown with private_composeDeploymentTransaction, and I haven't seen option to add a custom public contract data as a parameter. How do I compose with a custom public contract?

[jam10o-new]

Yeah, you wouldn't use composeDeploymentTransaction, you'd have to manually deploy. (this clearly isn't a recommended way to set up a private contract). Let me double check what initialCode and initialState are set to (they are extracted from the signed transaction that you pass to private_composeDeploymentTransaction).

[jam10o-new]

There's more going on than I thought, and it's not as simple as unwrapping the signed transaction and passing it on to your own deployment transaction unfortunately. Sorry about that.

[ngyam]

No worries, then I wait :)