Cargo Features

[dependencies]
ark-sponge = { version = "0.4.0-alpha", default-features = false, features = ["std", "r1cs"] }
default = r1cs, std

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

std default

Enables std of ark-ff, ark-r1cs-std, ark-relations, ark-serialize, and ark-std

ark-r1cs-std:

Dependencies for r1cs

r1cs default = ark-r1cs-std, ark-relations, tracing

Affects ark-sponge::constraints, poseidon::constraints

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.

ark-r1cs-std r1cs std
ark-relations r1cs std
tracing r1cs