Get the block hash for the block on the given round.
  GET /v2/blocks/{round}/hash     
 GET
 /v2/blocks/{round}/hash
 Authorizations
Parameters
Path Parameters
 round 
 required
   integer
The round from which to fetch block hash information.
Responses
200
Hash of a block header.
object
 blockHash 
 required
   Block header hash.
string
 400
Bad Request - Non integer number
An error response with optional data field.
object
 data    
 object
 message 
 required
   string
 401
Invalid API Token
An error response with optional data field.
object
 data    
 object
 message 
 required
   string
 404
None existing block
An error response with optional data field.
object
 data    
 object
 message 
 required
   string
 500
Internal Error
An error response with optional data field.
object
 data    
 object
 message 
 required
   string
 default
Unknown Error