* Create block offers queue and collect account preimages.
* Implement iterators to return account and storage proofs and bytecode from updatedCaches.
* Implement building offers from proofs.
* Refactor BlockDataRef type to only include required fields.
* Store block data in database.
* Improve state diff types.
* Implement start state backfill from specific block.
* Record last persisted block number in database.
* Persist account preimages in db.
* Apply state updates for DAO hard fork.
* Implement state gossip of block offers via portal JSON RPC.
* Refactor get parent gossip code and add Nibbles helper function.
* Add logging to state gossip.
* Unit test recursive gossip using state gossip getParent functions.
* Add recursive gossip genesis json test and fix bug in state gossip getParent.
* Add Nibbles len function.
* Add toContentKey helper functions.
* Implement typed lookup functions for getting account and storage trie nodes and bytecode.
* Re-implementation of recursive gossip.
* Offer validation improvements. Don't allow key end in Nibbles for leafs as defined in the spec.
* Minor refactor to validation and add addition bytecode check.
web3-developer
Kim De Mey