* Make signing fallable and asynchronous
This is needed for hardware wallets, which require human confirmation to
sign transactions. Blocking on a human to sign transactions is not a
good idea, and the signing might fail for many reasons (device
unplugged, authorization not granted, etc).
* Reformat
* Refactor as suggested by Andrew Jones (@ascjones).
* Use future::ok
Co-authored-by: Andrew Jones <ascjones@gmail.com>
* Support custom clients.
* Simplify trait bounds.
* Plain and double map storage support.
* Simplify more trait bounds.
* Add proc macro.
* Add Call, Event and Store traits.
* Update proc-macros.
* Add with_system for proc-macro.
* proc-macro: test: support signature and extra fields.
* proc-macro: test: support sharing state accross steps.
* proc-macro: test: fetch state sequentially.
* Elide lifetimes.
* Add test for plain storage.
* Run rustfmt.
Demi Obenour