pub const TYPENODEEMPTY: u8 = 0;
pub const TYPENODENORMAL: u8 = 1;
pub const TYPENODEFINAL: u8 = 2;
pub const TYPENODEVALUE: u8 = 3;
pub const TYPENODEROOT: u8 = 4;
pub const EMPTYNODEVALUE: [u8; 32] = [0; 32];