Cargo Features

hdwallet-filecoin has no features set by default.

[dependencies]
hdwallet-filecoin = { version = "0.2.1", features = ["keystore"] }
keystore = eth-keystore

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.

eth-keystore keystore?