Cargo Features

[dependencies]
starknet-ff = { version = "0.3.7", default-features = false, features = ["std", "alloc", "serde", "bigdecimal"] }
default = serde, std

These default features are set whenever starknet-ff is added without default-features = false somewhere in the dependency tree.

std default bigdecimal?
alloc serde

Enables alloc of optional serde

serde:

Provide impls for types in the Rust core allocation and collections library including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may be enabled without depending on all of std.

serde default = alloc

Enables serde, serde of optional bigdecimal ^0.3.0

bigdecimal = std

Enables bigdecimal ^0.3.0 and num-bigint

starknet-ff has 5 features without comments.