Implement transaction dependencies estimation

[digorithm]

Similar to the Rust SDK, the TS SDK should be able to estimate the transaction dependencies (contract input set and variable outputs).

This removes the guesswork of setting the variable outputs and contract input set when performing a call.

[Dhaiwat10]

I will try having a go at this one @digorithm

[Dhaiwat10]

After doing some digging around this, I found this function in our codebase: addMissingVariables. It does more or less what the estimate_tx_dependencies function from our Rust SDK does, and it is automatically called by several of TS SDK's functions like sendTransaction, call & simulate. So I think the TS SDK already adds in any missing transaction dependencies for you. I also found this unit test titled 'Automatically adds variableOutputs` which, I believe, tests this behaviour.

Do you think we still need to create another function? I might be missing something so please correct me if I'm wrong 😅

cc @digorithm

[luizstacio]

We currently have this solution working by simulating the tx. @digorithm @Dhaiwat10, if is now possible to know missing dependencies ahead of time without the need to call the tx then the work, is to replace the current solution.

[Dhaiwat10]

@luizstacio sorry, just seeing this when browsing the todo list. I missed your response among my Github notifications. You mentioned replacing the current solution. Why do we need to do that? Is the current solution not good enough? Or are we specifically looking for a solution that does not involve having to simulate the tx? Thanks.

[digorithm]

Unfortunately, we still have to simulate the transaction to be able to estimate the transaction dependencies.

So, is this feature live or not? I can't seem to find the documentation for it yet!

[Dhaiwat10]

@digorithm I would say yes the feature is live, but documentation around it is missing.

Our addMissingVariables function does the same things that the estimate_tx_dependencies in the Rust SDK does.

[digorithm]

@digorithm I would say yes the feature is live, but documentation around it is missing.

Our addMissingVariables function does the same things that the estimate_tx_dependencies in the Rust SDK does.

Ah, I see. Then I'll ask you two things: Can we rename addMissingVariables to estimateTxDependencies? Rationale: We should unify the nomenclature/terminology between the two SDKs. Please let me know what you think. The other thing: let's add this stuff to our docs; this is something users will often look for!

[Dhaiwat10]

@digorithm

1. Yes, I agree with the renaming suggestion because of the point you raised, and the fact that the addMissingVariables also adds any missing external contract IDs and not just missing variable outputs.
2. Will add docs for this!