Random example does not works on Rinkeby and Ropsten

[nosuchip]

I am trying to get worked this contract. It was deployed here and as you can see in "Event Logs" section of the transaction 0x89646db5402eaa5d4bd9dc97acbb8953154d236a9111ce18c7e59cc2d9035469 contains only strange event indicated that oraclize contract was called. But there is not event that fired on callback called.

[nosuchip]

Just checked - it does not works even on Ropsten.

[nosuchip]

It even does not works in your own IDE: http://dapps.oraclize.it/browser-solidity/

[bertani]

Hello @nosuchip ,
on Rinkeby/Ropsten we had some delays in processing queries during the last few days - those are being addressed. However the callback was correctly received (late!) by the contract you mentioned in your first post.
The browser-solidity IDE is known not to support the random datasource proof verification as a real chain is needed to verify the commitment and the "vm mode" of browser-solidity is an "in-memory" execution.

Don't forget that Oraclize is asynchronous and as such the call to your __callback method happens in a different transaction sent by Oraclize later on.

I hope this helps!

[nosuchip]

@bertani thank you for the response. I still see that issues with Ropsten/Rinkeby persist. But I'd like to clarify one thing - if I understood right, I should be able to run that example with commented out line that checks proof in your dapp IDE. But it still failed on contract creation step with error VM Exception: invalid opcode

[marcogiglio]

Hi @nosuchip, the issue should now be resolved for the testnets: there was a problem of mis-configuration in the network name, which made the proof fail.
Regarding the VM Exception in our fork of the IDE: the connector which is deployed in the Javascript VM is not updated to implement the randomDS_getSessionPubKeyHash() function. When the example code calls that function, then it will throw and this is what happens in the constructor: constructor() -> update() -> oraclize_newRandomDSQuery -> oraclize_randomDS_getSessionPubKeyHash function -> randomDS_getSessionPubKeyHash().

[nosuchip]

It is fantastic, but today this call oraclize_newRandomDSQuery(delay, randomBytesNumber, callbackGas); fails all the day on Rinkeby network.

[bertani]

This is fixed now. The Oraclize free deployments on testnets are experimental and they can experience issues from time to time.