Add Asynchronous Support to DataStore Trait Methods about miden-base HOT 2 CLOSED

One option which could minimize the amount of changes needed is to use something like maybe-async proc macro. A slightly modified version of the macro will soon be merged into Winterfell (see facebook/winterfell#276). Once this is done, we could:

• Add async feature to the miden-tx crate (turned off by default).

• Change DataStore trait to look something like:

  #[maybe_async]
  pub trait DataStore {
      async fn get_transaction_inputs(
          &self,
          account_id: AccountId,
          block_ref: u32,
          notes: &[NoteId],
      ) -> Result<TransactionInputs, DataStoreError>;
  
      async fn get_account_code(&self, account_id: AccountId) -> Result<ModuleAst, DataStoreError>;
  }

Then, when the crate is used with async feature enabled, we'd get the async versions of the trait, and we'd get the default version otherwise.

from miden-base.

Closed by #725

from miden-base.