* Started implementation of state endpoints.
* Add rpc calls and server stubs.
* Initial implementation of getAccountProof and getStorageProof.
* Refactor validation to use toAccount utils functions.
* Add state endpoints tests.
* 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.
* Implemented offer validation interface.
* Implement high level offer validation steps.
* Completed state validation tests.
* Update validation to use result type.
* Update state proof verification tests to test offer verification.
* Query history network to get state root by block hash.
* Fix state network test and remove usage of CoreDb.
* Fix state network gossip test and PR comment updates.
* Add trieproof state validation tests and fix for short nodes.
* Add retrieval content validation to state network.
* Complete state validation tests for retrieval content.
* Improve naming functions and parameters.
web3-developer