Cargo Features

[dependencies]
bitcoinconsensus = { version = "0.106.0+26.0", default-features = false, features = ["std", "external-secp"] }
default = std

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

std default
external-secp

bitcoinconsensus has 3 features without comments.