PMMR segment creation and validation

core/src/core.rs

@@ -33,6 +33,7 @@ pub use self::block_sums::*;
 pub use self::committed::Committed;
 pub use self::compact_block::*;
 pub use self::id::ShortId;
+pub use self::pmmr::segment::*;
 pub use self::transaction::*;
 
 /// Common errors

core/src/core/pmmr.rs

@@ -40,6 +40,7 @@ mod backend;
 mod pmmr;
 mod readonly_pmmr;
 mod rewindable_pmmr;
+pub mod segment;
 mod vec_backend;
 
 pub use self::backend::*;