Get Blockchain Status

Get the blockchain status.
Request: requestType is getBlockchainStatus
(S) lastBlock is the last block ID on the blockchain (S) application is the application name, typically BRS (B) isScanning is true if the blockchain is being scanned by the application, false otherwise (S) cumulativeDifficulty is the cumulative difficulty (N) lastBlockchainFeederHeight is the height of the last blockchain of greatest cumulative difficulty obtained from a peer (N) numberOfBlocks is the number of blocks in the blockchain (height + 1) (N) time is the current timestamp (in seconds since the genesis block) (S) version is the application version (S) lastBlockchainFeeder is the address or announced address of the peer providing the last blockchain of greatest cumulative difficulty (N) requestProcessingTime is the API request processing time (in milliseconds)