getblockheader
If verbose is true, returns an Object with information about blockheader 'hash'.
Argument #1-blockhash
Type: string, Required
Description: The block hash
Argument #2-verbose
Type: boolean, Optional
Default=true
Description: true for a json object, false for the hex-encoded data
Result---(for verbose = true)
{ (json object)
"hash" : "hex", (string) the block hash (same as provided)
"confirmations" : n, (numeric) The number of confirmations, or -1 if the block is not on the main chain
"height" : n, (numeric) The block height or index
"version" : n, (numeric) The block version
"versionHex" : "hex", (string) The block version formatted in hexadecimal
"merkleroot" : "hex", (string) The merkle root
"time" : xxx, (numeric) The block time expressed in UNIX epoch time
"mediantime" : xxx, (numeric) The median block time expressed in UNIX epoch time
"nonce" : n, (numeric) The nonce
"bits" : "hex", (string) The bits
"difficulty" : n, (numeric) The difficulty
"chainwork" : "hex", (string) Expected number of hashes required to produce the current chain
"nTx" : n, (numeric) The number of transactions in the block
"previousblockhash" : "hex", (string, optional) The hash of the previous block (if available)
"nextblockhash" : "hex" (string, optional) The hash of the next block (if available)
}
Result---(for verbose=false)
Type: string (hex)
Description: A string that is serialized, hex-encoded data for block 'hash'