Feature idea: Build ID

[encody]

Macro that adds an external method that returns the commit hash of the build.

This should be possible because macros run at compile time.

Existing similar NEP: https://github.com/near/NEPs/blob/master/neps/nep-0330.md

Possible Example Usage

trait BuildId {
    fn build_id(&self) -> String;
}

#[derive(BuildId)]
#[derive(BorshSerialize, BorshDeserialize, PanicOnDefault)]
#[near_bindgen]
pub struct MyContract {
    // ...
}

let contract = MyContract::new();
println!("{}", contract.build_id()); // 6a5992033dc4a092a5d45d64b4f205ce9aeb2939