github.com/bnb-chain/bnc-tendermint-iavl (go): Package iavl implements a versioned, snapshottable (immutable) AVL+ tree for persisting key-value pairs.  Basic usage of MutableTree.  Proof of existence:  Proof of absence:  Now we delete an old version:  Can't create a proof of absence for a version we no longer have:
Keywords: beacon-chain|core-chain