Invoking bitcoin-cli help getblocktemplate shows the following as example result:
{ (json object)
"version" : n, (numeric) The preferred block version
"rules" : [ (json array) specific block rules that are to be enforced
"str", (string) rulename
...
],
"vbavailable" : { (json object) set of pending, supported versionbit (BIP 9) softfork deployments
"rulename" : n, (numeric) identifies the bit number as indicating acceptance and readiness for the named softfork rule
...
},
"vbrequired" : n, (numeric) bit mask of versionbits the server requires set in submissions
"previousblockhash" : "str", (string) The hash of current highest block
"" : [ (json array) contents of non-coinbase transactions that should be included in the next block
{ (json object)
"data" : "hex", (string) transaction data encoded in hexadecimal (byte-for-byte)
"txid" : "hex", (string) transaction id encoded in little-endian hexadecimal
"hash" : "hex", (string) hash encoded in little-endian hexadecimal (including witness data)
"depends" : [ (json array) array of numbers
n, (numeric) transactions before this one (by 1-based index in 'transactions' list) that must be present in the final block if this one is
...
],
"fee" : n, (numeric) difference in value between transaction inputs and outputs (in satoshis); for coinbase transactions, this is a negative Number of the total collected block fees (ie, not including the block subsidy); if key is not present, fee is unknown and clients MUST NOT assume there isn't one
"sigops" : n, (numeric) total SigOps cost, as counted for purposes of block limits; if key is not present, sigop cost is unknown and clients MUST NOT assume it is zero
"weight" : n (numeric) total transaction weight, as counted for purposes of block limits
},
...
],
"coinbaseaux" : { (json object) data that should be included in the coinbase's scriptSig content
...
},
"coinbasevalue" : n, (numeric) maximum allowable input to coinbase transaction, including the generation award and transaction fees (in satoshis)
"coinbasetxn" : { (json object) information for coinbase transaction
...
},
"target" : "str", (string) The hash target
"mintime" : xxx, (numeric) The minimum timestamp appropriate for the next block time, expressed in UNIX epoch time
"mutable" : [ (json array) list of ways the block template may be changed
"str", (string) A way the block template may be changed, e.g. 'time', 'transactions', 'prevblock'
...
],
"noncerange" : "hex", (string) A range of valid nonces
"sigoplimit" : n, (numeric) limit of sigops in blocks
"sizelimit" : n, (numeric) limit of block size
"weightlimit" : n, (numeric) limit of block weight
"curtime" : xxx, (numeric) current timestamp in UNIX epoch time
"bits" : "str", (string) compressed target of next block
"height" : n (numeric) The height of the next block
}
actual result has more fields (capabilities, transactions(probably the field without a name), default_witness_commitment, longpollid) one field is missing (coinbasetxn):
{
"capabilities": [
"proposal"
],
"version": 536870912,
"rules": [
"csv",
"!segwit"
],
"vbavailable": {
},
"vbrequired": 0,
"previousblockhash": "000000005b00d9476d756947955556e6db801c676e6650118d633e66e800b940",
"transactions": [
{
"data": "02000000000106a84cea3a37cfe6a38c12fbf64761ac926c2f4ab05bbdac5b187e438f40860cc00000000017160014422b977c6a28f69359e2f0dfb6aa5197e466e5b8fdffffff33d588cec09c12f009fa9663a3db4390a4e8ddafe7d9a31092b3d$
"txid": "9493cb4f621a1f95a264526f216914f741e6f01bff3dfdab5ab9ec81c3ce16a5",
"hash": "543794756b046709b40c22ed9d0aa9492ef64e1f28d193a00efd6fd06e419f0a",
"depends": [
],
"fee": 133272,
"sigops": 6,
"weight": 2467
},
...
],
"coinbaseaux": {
},
"coinbasevalue": 19864212,
"longpollid": "000000005b00d9476d756947955556e6db801c676e6650118d633e66e800b940529",
"target": "000000000000000e7e1000000000000000000000000000000000000000000000",
"mintime": 1596097882,
"mutable": [
"time",
"transactions",
"prevblock"
],
"noncerange": "00000000ffffffff",
"sigoplimit": 80000,
"sizelimit": 4000000,
"weightlimit": 4000000,
"curtime": 1596104418,
"bits": "190e7e10",
"height": 1781942,
"default_witness_commitment": "6a24aa21a9ed167e62a901109d5cbbc8d3892c8e12f66c2b52a8675df9bbb0b30fa2c033ae30"
}
