NewAddressAllocator constructs a new statefull address allocator.

NewBlockHashList creates a block hash list It tries to load the metadata from the backend and if not exist it creates one.

NewBlockStore constructs a new block store.

NewContractHandler constructs a new ContractHandler.

BlockHashList stores the last `capacity` number of block hashes Under the hood it breaks the list of hashes into smaller fixed size buckets to minimize the number of bytes read and written during set/get operations.

ContractHandler is responsible for triggering calls to emulator, metering, event emission and updating the block.