Cargo Features

[dependencies]
solana_libra_crypto = { version = "0.0.1-sol5", default-features = false, features = ["std", "u64_backend", "testing"] }
default = std, u64_backend

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

std default testing?

Enables std of curve25519-dalek ^1.2.3 and ed25519-dalek ^1.0.0-pre.3

u64_backend default testing?

Enables u64_backend of curve25519-dalek ^1.2.3, ed25519-dalek ^1.0.0-pre.3, and x25519-dalek ^0.6.0

testing = std, u64_backend

solana_libra_crypto has 4 features without comments.