Commits on Feb 15, 2022

1. trie: implement NodeBlob API for trie iterator …

   This functionality is needed in new path-based storage scheme, but
   can be implemented in a seperate PR though.
   
   When an account is deleted, then all the storage slots should be
   nuked out from the disk as well. In hash-based storage scheme they
   are still left in the disk but in new scheme, they will be iterated
   and marked as deleted.
   
   But why the NodeBlob API is needed in this scenario? Because when
   the node is marked deleted, the previous value is also required to
   be recorded to construct the reverse diff.

   

   rjl493456442 committed Feb 15, 2022
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