GetBlockTemplate

The getblocktemplate RPC gets a block template or proposal for use with mining software. For more
information, please see the following resources:

Parameter #1---a JSON request object

Name	Type	Presence	Description
Request	object	Optional (exactly 1)	A JSON request object
→ `mode`	string	Optional (exactly 1)	This must be set to \template" or omitted"
→ `capabilities`	array (string)	Optional (0 or more)	A list of strings
→ → Capability	string	Optional (exactly 1)	Client side supported feature, `longpoll`, `coinbasetxn`, `coinbasevalue`, `proposal`, `serverlist`, `workid`
→ `rules`	array (string)	Optional (0 or more)	A list of strings
→ → Rules	string	Optional (exactly 1)	Client side supported softfork deployment, `csv`, `dip0001`, etc.

Result---block template

Name	Type	Presence	Description
`result`	object	Required (exactly 1)	A object containing a block template
→ `capabilities`	array (string)	Required (1 or more)	The client side supported features
→ → Capability	string	Optional (0 or more)	A client side supported feature
→ `version`	number (int)	Required (exactly 1)	The block version
→ `rules`	array (string)	Required (1 or more)	The specific block rules that are to be enforced
→ → Block Rule	string	Optional (0 or more)	A specific block rule to be enforced
→ `vbavailable`	object	Required (exactly 1)	Contains the set of pending, supported versionbit (BIP 9) softfork deployments
→ → Bit Number	number	Required (0 or more)	The bit number the named softfork rule
→ `vbrequired`	number	Required (exactly 1)	The bit mask of versionbits the server requires set in submissions
→ `previousblockhash`	string (hex)	Required (exactly 1)	The hash of current highest block
→ `transactions`	array (objects)	Optional (0 or more)	Non-coinbase transactions to be included in the next block
→ → Transaction	object	Optional (0 or more)	Non-coinbase transaction
→ → → `data`	string (hex)	Optional (0 or more)	Transaction data encoded in hex (byte-for-byte)
→ → → `hash`	string (hex)	Optional (0 or more)	The hash/id encoded in little-endian hex
→ → → `depends`	array (numbers)	Required (0 or more)	An array holding TXIDs of unconfirmed transactions this TX depends upon (parent transactions).
→ → → → Transaction number	number	Optional (1 or more)	Transactions before this one (by 1-based index in `transactions` list) that must be present in the final block if this one is
→ → → `fee`	number	Required (exactly 1)	The difference in value between transaction inputs and outputs (in duffs). 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`	number	Required (exactly 1)	Total SigOps. If not present, the count is unknown (clients MUST NOT assume there aren't any)
→ → → `required`	boolean	Optional (exactly 1)	If provided and true, this transaction must be in the final block
→ `coinbaseaux`	object	Required (exactly 1)	A object containing data that should be included in the coinbase scriptSig content
→ → Flags	string	Required (0 or more)
→ `coinbasevalue`	number	Required (exactly 1)	The maximum allowable input to coinbase transaction, including the generation award and transaction fees (in duffs)
→ `coinbasetxn`	object	Required (exactly 1)	Information for the coinbase transaction)
→ `target`	string	Required (exactly 1)	The hash target
→ `mintime`	number	Required (exactly 1)	The minimum timestamp appropriate for next block time in seconds since epoch
→ `mutable`	array (string)	Required (exactly 1)	The list of ways the block template may be changed
→ → Value	string	Required (0 or more)	A way the block template may be changed, e.g. 'time', 'transactions', 'prevblock'
→ `noncerange`	string	Required (exactly 1)	A range of valid nonces
→ `sigoplimit`	number	Required (exactly 1)	The limit of sigops in blocks
→ `sizelimit`	number	Required (exactly 1)	The limit of block size
→ `curtime`	number	Required (exactly 1)	The current timestamp in seconds since epoch
→ `bits`	string	Required (exactly 1)	The compressed target of next block
→ `previousbits`	string	Required (exactly 1)	The compressed target of the current highest block
→ `height`	number	Required (exactly 1)	The height of the next block
→ `masternode`	array (objects)	Required (0 or more)	Required masternode payments that must be included in the next block
→ → Masternode Payee	object	Optional (0 or more)	Object containing a masternode payee's information
→ → → `payee`	string	Required (exactly 1)	Payee address
→ → → `script`	string	Required (exactly 1)	Payee scriptPubKey
→ → → `amount`	number	Required (exactly 1)	Required amount to pay
→ `masternode_payments_started`	boolean	Required (exactly 1)	True if masternode payments started
→ `masternode_payments_enforced`	boolean	Required (exactly 1)	True if masternode payments enforced
→ `superblock`	array (objects)	Required (0 or more)	The superblock payees that must be included in the next block
→ → Superblock Payee	object	Optional (0 or more)	Object containing a superblock payee's information
→ → → `payee`	string	Required (exactly 1)	Payee address
→ → → `script`	string	Required (exactly 1)	Payee scriptPubKey
→ → → `amount`	number	Required (exactly 1)	Required amount to pay
→ `superblocks_started`	boolean	Required (exactly 1)	True if superblock payments started
→ `superblocks_enabled`	boolean	Required (exactly 1)	True if superblock payments enabled
→ `coinbase_payload`	string	Required (exactly 1)	Added in Dash Core 0.13.0 Coinbase transaction payload data encoded in hexadecimal

Example from Dash Core 0.13.0

dash-cli -testnet getblocktemplate

Result:

{
  "capabilities": [
    "proposal"
  ],
  "version": 536870920,
  "rules": [
    "csv",
    "dip0001",
    "bip147"
  ],
  "vbavailable": {
    "dip0003": 3
  },
  "vbrequired": 0,
  "previousblockhash": "0000000004dd4bf3ed4f4bac4a8f8c781a73bff32886390ec15fa0c5686476ac",
  "transactions": [
  ],
  "coinbaseaux": {
    "flags": ""
  },
  "coinbasevalue": 2089285715,
  "longpollid": "0000000004dd4bf3ed4f4bac4a8f8c781a73bff32886390ec15fa0c5686476ac4",
  "target": "000000000eeb4b00000000000000000000000000000000000000000000000000",
  "mintime": 1542118149,
  "mutable": [
    "time",
    "transactions",
    "prevblock"
  ],
  "noncerange": "00000000ffffffff",
  "sigoplimit": 40000,
  "sizelimit": 2000000,
  "curtime": 1542119335,
  "bits": "1c0eeb4b",
  "previousbits": "1c0e639b",
  "height": 263905,
  "masternode": [
    {
      "payee": "yedxgyCLu7BpxBbpeLUw4vAkxNrcEgHt57",
      "script": "76a914c8f2a948efe84e9d9795aa473c5afb6023d6c07488ac",
      "amount": 1044642850
    }
  ],
  "masternode_payments_started": true,
  "masternode_payments_enforced": true,
  "superblock": [
  ],
  "superblocks_started": true,
  "superblocks_enabled": true,
  "coinbase_payload": ""
}

See also

SetGenerate: was removed in Dash Core 0.12.3.
GetMiningInfo: returns various mining-related information.
SubmitBlock: accepts a block, verifies it is a valid addition to the block chain, and broadcasts it to the network. Extra parameters are ignored by Dash Core but may be used by mining pools or other programs.
PrioritiseTransaction: adds virtual priority or fee to a transaction, allowing it to be accepted into blocks mined by this node (or miners which use this node) with a lower priority or fee. (It can also remove virtual priority or fee, requiring the transaction have a higher priority or fee to be accepted into a locally-mined block.)

GetMiningInfo

The getmininginfo RPC returns various mining-related information.

Parameters: none

Result---various mining-related information

Name	Type	Presence	Description
`result`	object	Required (exactly 1)	Various mining-related information
→ `blocks`	number (int)	Required (exactly 1)	The height of the highest block on the local best block chain
→ `currentblocksize`	number (int)	Required (exactly 1)	If generation was enabled since the last time this node was restarted, this is the size in bytes of the last block built by this node for header hash checking. Otherwise, the value `0`
→ `currentblocktx`	number (int)	Required (exactly 1)	If generation was enabled since the last time this node was restarted, this is the number of transactions in the last block built by this node for header hash checking. Otherwise, this is the value `0`
→ `difficulty`	number (real)	Required (exactly 1)	If generation was enabled since the last time this node was restarted, this is the difficulty of the highest-height block in the local best block chain. Otherwise, this is the value `0`
→ `errors`	string	Required (exactly 1)	A plain-text description of any errors this node has encountered or detected. If there are no errors, an empty string will be returned. This is not related to the JSON-RPC `error` field
→ `genproclimit`	number (int)	Required (exactly 1)	The processor limit for generation (-1 if no generation - see getgenerate or setgenerate calls). Removed in Bitcoin Core 0.13.0
→ `networkhashps`	number (int)	Required (exactly 1)	An estimate of the number of hashes per second the network is generating to maintain the current difficulty. See the `getnetworkhashps` RPC for configurable access to this data
→ `pooledtx`	number (int)	Required (exactly 1)	The number of transactions in the memory pool
→ `testnet`	bool	Required (exactly 1)	Set to `true` if this node is running on testnet. Set to `false` if this node is on mainnet or a regtest Removed in Bitcoin Core 0.14.0
→ `chain`	string	Required (exactly 1)	Set to `main` for mainnet, `test` for testnet, and `regtest` for regtest
→ `generate`	bool	Optional (0 or 1)	Set to `true` if generation is currently enabled; set to `false` if generation is currently disabled. Only returned if the node has wallet support enabled Removed in Bitcoin Core 0.13.0

Example from Dash Core 0.12.2

dash-cli getmininginfo

Result:

{
  "blocks": 8036,
  "currentblocksize": 0,
  "currentblocktx": 0,
  "difficulty": 0.8239043524175907,
  "errors": "",
  "genproclimit": 1,
  "networkhashps": 22234635.4469006,
  "pooledtx": 3,
  "testnet": true,
  "chain": "test",
  "generate": false
}

See also

GetMemPoolInfo: returns information about the node's current transaction memory pool.
GetRawMemPool: returns all transaction identifiers (TXIDs) in the memory pool as a JSON array, or detailed information about each transaction in the memory pool as a JSON object.
GetBlockTemplate: gets a block template or proposal for use with mining software.
Generate: mines blocks immediately (before the RPC call returns).

GetNetworkHashPS

The getnetworkhashps RPC returns the estimated network hashes per second based on the last n blocks.

Parameter #1---number of blocks to average

Name	Type	Presence	Description
`blocks`	number (int)	Optional (0 or 1)	The number of blocks to average together for calculating the estimated hashes per second. Default is `120`. Use `-1` to average all blocks produced since the last difficulty change

Parameter #2---block height

Name	Type	Presence	Description
`height`	number (int)	Optional (0 or 1)	The height of the last block to use for calculating the average. Defaults to `-1` for the highest-height block on the local best block chain. If the specified height is higher than the highest block on the local best block chain, it will be interpreted the same as `-1`

Result---estimated hashes per second

Name	Type	Presence	Description
`result`	number (int)	Required (exactly 1)	The estimated number of hashes per second based on the parameters provided. May be 0 (for Height=`0`, the genesis block) or a negative value if the highest-height block averaged has a block header time earlier than the lowest-height block averaged

Example from Dash Core 0.12.2

Get the average hashes per second for all the blocks since the last
difficulty change before block 6000.

dash-cli -testnet getnetworkhashps -1 6000

Result:

22214011.90821117

See also

GetDifficulty: returns the proof-of-work difficulty as a multiple of the minimum difficulty.
GetBlock: gets a block with a particular header hash from the local block database either as a JSON object or as a serialized block.

PrioritiseTransaction

The prioritisetransaction RPC adds virtual priority or fee to a transaction, allowing it to be accepted into blocks mined by this node (or miners which use this node) with a lower priority or fee. (It can also remove virtual priority or fee, requiring the transaction have a higher priority or fee to be accepted into a locally-mined block.)

Parameter #1---the TXID of the transaction to modify

Name	Type	Presence	Description
TXID	string	Required (exactly 1)	The TXID of the transaction whose virtual priority or fee you want to modify, encoded as hex in RPC byte order

Parameter #2---the change to make to the virtual fee

Name	Type	Presence	Description
Fee	number (int)	Required (exactly 1)	Warning: this value is in duffs, not Dash If positive, the virtual fee to add to the actual fee paid by the transaction; if negative, the virtual fee to subtract from the actual fee paid by the transaction. No change is made to the actual fee paid by the transaction

Result---true if the priority is changed

Name	Type	Presence	Description
`result`	bool (true only)	Required (exactly 1)	Always set to `true` if all three parameters are provided. Will not return an error if the TXID is not in the memory pool. If fewer or more than three arguments are provided, or if something goes wrong, will be set to `null`

Example from Dash Core 0.14.0

dash-cli -testnet prioritisetransaction \
    f86c74f27fdd9c7e618d69b3606eeae1710b3f02fabede6ae8c88dd7bb756942 \
    456789

Result:

true

See also

GetRawMemPool: returns all transaction identifiers (TXIDs) in the memory pool as a JSON array, or detailed information about each transaction in the memory pool as a JSON object.
GetBlockTemplate: gets a block template or proposal for use with mining software.

SubmitBlock

The submitblock RPC accepts a block, verifies it is a valid addition to the block chain, and broadcasts it to the network. Extra parameters are ignored by Dash Core but may be used by mining pools or other programs.

Parameter #1---the new block in serialized block format as hex

Name	Type	Presence	Description
Block	string (hex)	Required (exactly 1)	The full block to submit in serialized block format as hex

Parameter #2---dummy value

Name	Type	Presence	Description
`dummy`	object	Optional (0 or 1)	A dummy value for compatibility with BIP22. This value is ignored.

Result---null or error string

Name	Type	Presence	Description
`result`	null/string	Required (exactly 1)	If the block submission succeeded, set to JSON `null`. If submission failed, set to one of the following strings: `duplicate`, `duplicate-invalid`, `inconclusive`, or `rejected`. The JSON-RPC `error` field will still be set to `null` if submission failed for one of these reasons

Example from Dash Core 0.15.0

Submit the following block with the a dummy value, "test".

dash-cli -testnet submitblock 0100002032e3965d5fdd7a883209d516599337eb4cb82f\
  7aea22ecc114942c1f00000000244388a3bd2c38a85bf337755a1a165d0df2b335e3886058\
  40e08a3cdf1ce1a4297ede598f6a011d027c1c300201000000010000000000000000000000\
  000000000000000000000000000000000000000000ffffffff1202791f0e2f5032506f6f6c\
  2d74444153482fffffffff044d75bb8b010000001976a914d4a5ea2641e9dd37f7a5ad5c92\
  9df4743518769188acac2ea68f010000001976a9148d0934de58f969df3b53a72b4f47211d\
  890ebf5588ac68b9ea03000000004341047559d13c3f81b1fadbd8dd03e4b5a1c73b05e2b9\
  80e00d467aa9440b29c7de23664dde6428d75cafed22ae4f0d302e26c5c5a5dd4d3e1b796d\
  7281bdc9430f35ac00000000000000002a6a28f47e935509fc85533dc78197e93e87d1c793\
  43bda495429d8e3680069f6a22780000000002000000000000000100000001078e0c77e3b0\
  4323d0834841f965543aaae2b275f684f55fbaf22e1c83bff97e010000006a473044022077\
  6e96d202cc4f50f79d269d7cd36712c7486282dda0cb6eae583c916c98b34c022070941efb\
  3201cf500cc6b879d6570fc477d4c3e6a8d91286e84465235f542c42012102dddbfc3fe06b\
  96e3a36f3e815222cd1cb9586b3193c4a0de030477f621956d51feffffff02a00bd1000000\
  00001976a914d7b47d4b40a23c389f5a17754d7f60f511c7d0ec88ac316168821300000019\
  76a914c9190e507834b78a624d7578f1ad3819592ca1aa88ac771f0000 \
  "test"

Result (the block above was already on a local block chain):

duplicate

See also

GetBlockTemplate: gets a block template or proposal for use with mining software.