Consider adding repeatable future PoC

[sergeyboyko0791]

I've been wanting for a repeatable futures for a long time, and I guess I got a solution using a macro.
Let's see an example:
https://github.com/KomodoPlatform/atomicDEX-API/blob/dff315f90c1ede37e5ccfcc5dec9018f6dd40b82/mm2src/coins/utxo/utxo_builder/utxo_coin_builder.rs#L820-L841

The main idea is to capture the code of the async block and return it from an Fn closure:
https://github.com/KomodoPlatform/atomicDEX-API/blob/dff315f90c1ede37e5ccfcc5dec9018f6dd40b82/mm2src/common/patterns/repeatable.rs#L14-L16

Currently, I added support for the future attempts, but I'm looking forward to continue the implementation, for example, repeat-until feature:

repeatable!(async {
  match rpc_client.version().await {
    Ok(version) => ready!(version),
    Err(_) => retry!(),
  }
})
.repeat_until(now_ms() + 1000 * 10) // Repeat until now + 10 seconds.
. await;

Current implementation is available here

[sergeyboyko0791]

@shamardy @artemii235 @ozkanonur do you think it's worth to proceed with the implementation?

[shamardy]

do you think it's worth to proceed with the implementation?

I like the idea :) We use loops in a lot of places for the same functionalities and this will make the code much more readable.
@artemii235 proposed a similar idea in a previous review of a PR of mine here #1240 (comment) but I couldn't implement it using a trait that's implemented for Future.

[sergeyboyko0791]

Yeah, I lost this comment, but I was inspired by exactly it 😁
I also couldn't find the way to repeat a complete future adding a RepeatableFuture trait, but found a workaround using the macro

[onur-ozkan]

This looks good. We have to many duplicated loops in mm2 source code. We can replace them using this.

[sergeyboyko0791]

Close as solved