Struct zebra_rpc::methods::get_block_template_rpcs::types::get_block_template::GetBlockTemplate
source · pub struct GetBlockTemplate {Show 21 fields
pub capabilities: Vec<String>,
pub version: u32,
pub previous_block_hash: GetBlockHash,
pub block_commitments_hash: ChainHistoryBlockTxAuthCommitmentHash,
pub light_client_root_hash: ChainHistoryBlockTxAuthCommitmentHash,
pub final_sapling_root_hash: ChainHistoryBlockTxAuthCommitmentHash,
pub default_roots: DefaultRoots,
pub transactions: Vec<TransactionTemplate<NonNegative>>,
pub coinbase_txn: TransactionTemplate<NegativeOrZero>,
pub long_poll_id: LongPollId,
pub target: ExpandedDifficulty,
pub min_time: DateTime32,
pub mutable: Vec<String>,
pub nonce_range: String,
pub sigop_limit: u64,
pub size_limit: u64,
pub cur_time: DateTime32,
pub bits: CompactDifficulty,
pub height: u32,
pub max_time: DateTime32,
pub submit_old: Option<bool>,
}Expand description
A serialized getblocktemplate RPC response in template mode.
Fields§
§capabilities: Vec<String>The getblocktemplate RPC capabilities supported by Zebra.
At the moment, Zebra does not support any of the extra capabilities from the specification:
proposal: https://en.bitcoin.it/wiki/BIP_0023#Block_Proposallongpoll: https://en.bitcoin.it/wiki/BIP_0022#Optional:_Long_Pollingserverlist: https://en.bitcoin.it/wiki/BIP_0023#Logical_Services
By the above, Zebra will always return an empty vector here.
version: u32The version of the block format. Always 4 for new Zcash blocks.
previous_block_hash: GetBlockHashThe hash of the previous block.
block_commitments_hash: ChainHistoryBlockTxAuthCommitmentHashThe block commitment for the new block’s header.
Same as [DefaultRoots.block_commitments_hash], see that field for details.
light_client_root_hash: ChainHistoryBlockTxAuthCommitmentHashLegacy backwards-compatibility header root field.
Same as [DefaultRoots.block_commitments_hash], see that field for details.
final_sapling_root_hash: ChainHistoryBlockTxAuthCommitmentHashLegacy backwards-compatibility header root field.
Same as [DefaultRoots.block_commitments_hash], see that field for details.
default_roots: DefaultRootsThe block header roots for [GetBlockTemplate.transactions].
If the transactions in the block template are modified, these roots must be recalculated according to the specification.
transactions: Vec<TransactionTemplate<NonNegative>>The non-coinbase transactions selected for this block template.
coinbase_txn: TransactionTemplate<NegativeOrZero>The coinbase transaction generated from transactions and height.
long_poll_id: LongPollIdAn ID that represents the chain tip and mempool contents for this template.
target: ExpandedDifficultyThe expected difficulty for the new block displayed in expanded form.
min_time: DateTime32For each block other than the genesis block, nTime MUST be strictly greater than the median-time-past of that block.
mutable: Vec<String>Hardcoded list of block fields the miner is allowed to change.
nonce_range: StringA range of valid nonces that goes from u32::MIN to u32::MAX.
sigop_limit: u64Max legacy signature operations in the block.
size_limit: u64Max block size in bytes
cur_time: DateTime32the current time as seen by the server (recommended for block time). note this is not necessarily the system clock, and must fall within the mintime/maxtime rules
bits: CompactDifficultyThe expected difficulty for the new block displayed in compact form.
height: u32The height of the next block in the best chain.
max_time: DateTime32the maximum time allowed
https://en.bitcoin.it/wiki/BIP_0023#Mutations
Zebra adjusts the minimum and current times for testnet minimum difficulty blocks, so we need to tell miners what the maximum valid time is.
This field is not in zcashd or the Zcash RPC reference yet.
Currently, some miners just use min_time or cur_time. Others calculate max_time from the
fixed 90 minute consensus rule, or a smaller fixed interval (like 1000s).
Some miners don’t check the maximum time. This can cause invalid blocks after network downtime,
a significant drop in the hash rate, or after the testnet minimum difficulty interval.
submit_old: Option<bool>only relevant for long poll responses: indicates if work received prior to this response remains potentially valid (default) and should have its shares submitted; if false, the miner may wish to discard its share queue
https://en.bitcoin.it/wiki/BIP_0022#Optional:_Long_Polling
This field is not in zcashd or the Zcash RPC reference yet.
In Zebra, submit_old is false when the tip block changed or max time is reached,
and true if only the mempool transactions have changed.
Implementations§
source§impl GetBlockTemplate
impl GetBlockTemplate
sourcepub fn capabilities() -> Vec<String>
pub fn capabilities() -> Vec<String>
Returns a Vec of capabilities supported by the getblocktemplate RPC
sourcepub fn new(
network: &Network,
miner_address: &Address,
chain_tip_and_local_time: &GetBlockTemplateChainInfo,
long_poll_id: LongPollId,
mempool_txs: Vec<VerifiedUnminedTx>,
submit_old: Option<bool>,
like_zcashd: bool,
extra_coinbase_data: Vec<u8>
) -> Self
pub fn new( network: &Network, miner_address: &Address, chain_tip_and_local_time: &GetBlockTemplateChainInfo, long_poll_id: LongPollId, mempool_txs: Vec<VerifiedUnminedTx>, submit_old: Option<bool>, like_zcashd: bool, extra_coinbase_data: Vec<u8> ) -> Self
Returns a new GetBlockTemplate struct, based on the supplied arguments and defaults.
The result of this method only depends on the supplied arguments and constants.
If like_zcashd is true, try to match the coinbase transactions generated by zcashd
in the getblocktemplate RPC.
Trait Implementations§
source§impl Clone for GetBlockTemplate
impl Clone for GetBlockTemplate
source§fn clone(&self) -> GetBlockTemplate
fn clone(&self) -> GetBlockTemplate
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moresource§impl Debug for GetBlockTemplate
impl Debug for GetBlockTemplate
source§impl<'de> Deserialize<'de> for GetBlockTemplate
impl<'de> Deserialize<'de> for GetBlockTemplate
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
source§impl From<GetBlockTemplate> for Response
impl From<GetBlockTemplate> for Response
source§fn from(template: GetBlockTemplate) -> Self
fn from(template: GetBlockTemplate) -> Self
Converts to this type from the input type.
source§impl PartialEq for GetBlockTemplate
impl PartialEq for GetBlockTemplate
source§fn eq(&self, other: &GetBlockTemplate) -> bool
fn eq(&self, other: &GetBlockTemplate) -> bool
This method tests for
self and other values to be equal, and is used
by ==.source§impl Serialize for GetBlockTemplate
impl Serialize for GetBlockTemplate
impl Eq for GetBlockTemplate
impl StructuralPartialEq for GetBlockTemplate
Auto Trait Implementations§
impl Freeze for GetBlockTemplate
impl RefUnwindSafe for GetBlockTemplate
impl Send for GetBlockTemplate
impl Sync for GetBlockTemplate
impl Unpin for GetBlockTemplate
impl UnwindSafe for GetBlockTemplate
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