Cargo Features

[dependencies]
pallet-staking-reward-fn = { version = "22.0.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever pallet-staking-reward-fn is added without default-features = false somewhere in the dependency tree.

std default

Enables std of log and sp-arithmetic

pallet-staking-reward-fn has 2 features without comments.