Cargo Features

[dependencies]
pallet-plasma = { version = "1.7.1", default-features = false, features = ["std"] }
default = std

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

std default = serde

Enables std of parity-scale-codec ^2.0, frame-support ^3.0.0, frame-system ^3.0.0, pallet-contracts ^3.0.0, pallet-ovm, sp-arithmetic ^3.0.0, sp-core ^3.0.0, sp-io ^3.0.0, sp-runtime ^3.0.0, and sp-std ^3.0.0

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.

serde std