Cargo Features

[dependencies]
async-abci = { version = "0.1.8", default-features = false, features = ["tokio-backend", "smol-backend"] }
default = smol-backend

The smol-backend feature is set by default whenever async-abci is added without default-features = false somewhere in the dependency tree.

tokio-backend = tokio
smol-backend default = smol

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

tokio tokio-backend?
smol smol-backend

Enables smol ^1.2.5