Callback to contract after future becomes ready

[mn13]

After a Future result is added on chain, the smart contract that created it should be called back for it to know that the request has completed.

To be decided exactly how this works: should we record inside each future what function we will call? Or, should we have a fixed signature (e.g. callback(uint64 id, bytes calldata output)) for all the futures?

[mn13]

I think it can be fixed, smth like asyncCallback(uint64 id, bytes calldata output).
May be we need to save contract address which should be called.

[mn13]

Can we get general solution for calling back contract not only for futures but for keyRequest and signRequest also?