Const
Ref: https://github.com/paritytech/polkadot-sdk/blob/1f023deab8d021c5bab08731e13aa12590ed4026/substrate/primitives/consensus/babe/src/lib.rs#L377-L427
Ref: https://github.com/paritytech/polkadot-sdk/blob/1f023deab8d021c5bab08731e13aa12590ed4026/substrate/primitives/consensus/babe/src/lib.rs#L377-L427