pub struct HostConfiguration<BlockNumber> {Show 35 fields
pub max_code_size: u32,
pub max_head_data_size: u32,
pub max_upward_queue_count: u32,
pub max_upward_queue_size: u32,
pub max_upward_message_size: u32,
pub max_upward_message_num_per_candidate: u32,
pub hrmp_max_message_num_per_candidate: u32,
pub validation_upgrade_cooldown: BlockNumber,
pub validation_upgrade_delay: BlockNumber,
pub async_backing_params: AsyncBackingParams,
pub max_pov_size: u32,
pub max_downward_message_size: u32,
pub hrmp_max_parachain_outbound_channels: u32,
pub hrmp_sender_deposit: Balance,
pub hrmp_recipient_deposit: Balance,
pub hrmp_channel_max_capacity: u32,
pub hrmp_channel_max_total_size: u32,
pub hrmp_max_parachain_inbound_channels: u32,
pub hrmp_channel_max_message_size: u32,
pub executor_params: ExecutorParams,
pub code_retention_period: BlockNumber,
pub max_validators: Option<u32>,
pub dispute_period: SessionIndex,
pub dispute_post_conclusion_acceptance_period: BlockNumber,
pub no_show_slots: u32,
pub n_delay_tranches: u32,
pub zeroth_delay_tranche_width: u32,
pub needed_approvals: u32,
pub relay_vrf_modulo_samples: u32,
pub pvf_voting_ttl: SessionIndex,
pub minimum_validation_upgrade_delay: BlockNumber,
pub minimum_backing_votes: u32,
pub node_features: NodeFeatures,
pub approval_voting_params: ApprovalVotingParams,
pub scheduler_params: SchedulerParams<BlockNumber>,
}
Expand description
All configuration of the runtime with respect to paras.
Fields§
§max_code_size: u32
The parameters that are required for the parachains. The maximum validation code size, in bytes.
max_head_data_size: u32
The maximum head-data size, in bytes.
max_upward_queue_count: u32
Total number of individual messages allowed in the parachain -> relay-chain message queue.
max_upward_queue_size: u32
Total size of messages allowed in the parachain -> relay-chain message queue before which no further messages may be added to it. If it exceeds this then the queue may contain only a single message.
max_upward_message_size: u32
The maximum size of an upward message that can be sent by a candidate.
This parameter affects the size upper bound of the CandidateCommitments
.
max_upward_message_num_per_candidate: u32
The maximum number of messages that a candidate can contain.
This parameter affects the size upper bound of the CandidateCommitments
.
hrmp_max_message_num_per_candidate: u32
The maximum number of outbound HRMP messages can be sent by a candidate.
This parameter affects the upper bound of size of CandidateCommitments
.
validation_upgrade_cooldown: BlockNumber
The minimum period, in blocks, between which parachains can update their validation code.
This number is used to prevent parachains from spamming the relay chain with validation
code upgrades. The only thing it controls is the number of blocks the
UpgradeRestrictionSignal
is set for the parachain in question.
If PVF pre-checking is enabled this should be greater than the maximum number of blocks
PVF pre-checking can take. Intuitively, this number should be greater than the duration
specified by pvf_voting_ttl
. Unlike,
pvf_voting_ttl
, this parameter uses blocks as a unit.
validation_upgrade_delay: BlockNumber
The delay, in blocks, after which an upgrade of the validation code is applied.
The upgrade for a parachain takes place when the first candidate which has relay-parent >=
the relay-chain block where the upgrade is scheduled. This block is referred as to
expected_at
.
expected_at
is determined when the upgrade is scheduled. This happens when the candidate
that signals the upgrade is enacted. Right now, the relay-parent block number of the
candidate scheduling the upgrade is used to determine the expected_at
. This may change in
the future with #4601.
When PVF pre-checking is enabled, the upgrade is scheduled only after the PVF pre-check has been completed.
Note, there are situations in which expected_at
in the past. For example, if
paras_availability_period
is less than the
delay set by this field or if PVF pre-check took more time than the delay. In such cases,
the upgrade is further at the earliest possible time determined by
minimum_validation_upgrade_delay
.
The rationale for this delay has to do with relay-chain reversions. In case there is an
invalid candidate produced with the new version of the code, then the relay-chain can
revert validation_upgrade_delay
many blocks back and
still find the new code in the storage by hash.
async_backing_params: AsyncBackingParams
Asynchronous backing parameters.
max_pov_size: u32
The parameters that are not essential, but still may be of interest for parachains. The maximum POV block size, in bytes.
max_downward_message_size: u32
The maximum size of a message that can be put in a downward message queue.
Since we require receiving at least one DMP message the obvious upper bound of the size is the PoV size. Of course, there is a lot of other different things that a parachain may decide to do with its PoV so this value in practice will be picked as a fraction of the PoV size.
hrmp_max_parachain_outbound_channels: u32
The maximum number of outbound HRMP channels a parachain is allowed to open.
hrmp_sender_deposit: Balance
The deposit that the sender should provide for opening an HRMP channel.
hrmp_recipient_deposit: Balance
The deposit that the recipient should provide for accepting opening an HRMP channel.
hrmp_channel_max_capacity: u32
The maximum number of messages allowed in an HRMP channel at once.
hrmp_channel_max_total_size: u32
The maximum total size of messages in bytes allowed in an HRMP channel at once.
hrmp_max_parachain_inbound_channels: u32
The maximum number of inbound HRMP channels a parachain is allowed to accept.
hrmp_channel_max_message_size: u32
The maximum size of a message that could ever be put into an HRMP channel.
This parameter affects the upper bound of size of CandidateCommitments
.
executor_params: ExecutorParams
The executor environment parameters
code_retention_period: BlockNumber
Parameters that will unlikely be needed by parachains. How long to keep code on-chain, in blocks. This should be sufficiently long that disputes have concluded.
max_validators: Option<u32>
The maximum number of validators to use for parachain consensus, period.
None
means no maximum.
dispute_period: SessionIndex
The amount of sessions to keep for disputes.
dispute_post_conclusion_acceptance_period: BlockNumber
How long after dispute conclusion to accept statements.
no_show_slots: u32
The amount of consensus slots that must pass between submitting an assignment and submitting an approval vote before a validator is considered a no-show.
Must be at least 1.
n_delay_tranches: u32
The number of delay tranches in total. Must be at least 1.
zeroth_delay_tranche_width: u32
The width of the zeroth delay tranche for approval assignments. This many delay tranches beyond 0 are all consolidated to form a wide 0 tranche.
needed_approvals: u32
The number of validators needed to approve a block.
relay_vrf_modulo_samples: u32
The number of samples to do of the RelayVRFModulo
approval assignment criterion.
pvf_voting_ttl: SessionIndex
If an active PVF pre-checking vote observes this many number of sessions it gets automatically rejected.
0 means PVF pre-checking will be rejected on the first observed session unless the voting gained supermajority before that the session change.
minimum_validation_upgrade_delay: BlockNumber
The lower bound number of blocks an upgrade can be scheduled.
Typically, upgrade gets scheduled
validation_upgrade_delay
relay-chain blocks after
the relay-parent of the parablock that signalled the validation code upgrade. However,
in the case a pre-checking voting was concluded in a longer duration the upgrade will be
scheduled to the next block.
That can disrupt parachain inclusion. Specifically, it will make the blocks that were already backed invalid.
To prevent that, we introduce the minimum number of blocks after which the upgrade can be scheduled. This number is controlled by this field.
This value should be greater than
paras_availability_period
.
minimum_backing_votes: u32
The minimum number of valid backing statements required to consider a parachain candidate backable.
node_features: NodeFeatures
Node features enablement.
approval_voting_params: ApprovalVotingParams
Params used by approval-voting
scheduler_params: SchedulerParams<BlockNumber>
Scheduler parameters
Implementations§
source§impl<BlockNumber> HostConfiguration<BlockNumber>
impl<BlockNumber> HostConfiguration<BlockNumber>
sourcepub fn check_consistency(&self) -> Result<(), InconsistentError<BlockNumber>>
pub fn check_consistency(&self) -> Result<(), InconsistentError<BlockNumber>>
Checks that this instance is consistent with the requirements on each individual member.
§Errors
This function returns an error if the configuration is inconsistent.
sourcepub fn panic_if_not_consistent(&self)
pub fn panic_if_not_consistent(&self)
Checks that this instance is consistent with the requirements on each individual member.
§Panics
This function panics if the configuration is inconsistent.
Trait Implementations§
source§impl<BlockNumber: Clone> Clone for HostConfiguration<BlockNumber>
impl<BlockNumber: Clone> Clone for HostConfiguration<BlockNumber>
source§fn clone(&self) -> HostConfiguration<BlockNumber>
fn clone(&self) -> HostConfiguration<BlockNumber>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<BlockNumber> Debug for HostConfiguration<BlockNumber>where
BlockNumber: Debug,
impl<BlockNumber> Debug for HostConfiguration<BlockNumber>where
BlockNumber: Debug,
source§impl<BlockNumber> Decode for HostConfiguration<BlockNumber>where
BlockNumber: Decode,
SchedulerParams<BlockNumber>: Decode,
impl<BlockNumber> Decode for HostConfiguration<BlockNumber>where
BlockNumber: Decode,
SchedulerParams<BlockNumber>: Decode,
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dst: &mut MaybeUninit<Self>,
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I: Input,
fn skip<I>(input: &mut I) -> Result<(), Error>where
I: Input,
§fn encoded_fixed_size() -> Option<usize>
fn encoded_fixed_size() -> Option<usize>
source§impl<'de, BlockNumber> Deserialize<'de> for HostConfiguration<BlockNumber>where
BlockNumber: Deserialize<'de>,
impl<'de, BlockNumber> Deserialize<'de> for HostConfiguration<BlockNumber>where
BlockNumber: Deserialize<'de>,
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
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__D: Deserializer<'de>,
source§impl<BlockNumber> Encode for HostConfiguration<BlockNumber>where
BlockNumber: Encode,
SchedulerParams<BlockNumber>: Encode,
impl<BlockNumber> Encode for HostConfiguration<BlockNumber>where
BlockNumber: Encode,
SchedulerParams<BlockNumber>: Encode,
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source§impl<BlockNumber: PartialEq> PartialEq for HostConfiguration<BlockNumber>
impl<BlockNumber: PartialEq> PartialEq for HostConfiguration<BlockNumber>
source§fn eq(&self, other: &HostConfiguration<BlockNumber>) -> bool
fn eq(&self, other: &HostConfiguration<BlockNumber>) -> bool
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and other
values to be equal, and is used
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.source§impl<BlockNumber> Serialize for HostConfiguration<BlockNumber>where
BlockNumber: Serialize,
impl<BlockNumber> Serialize for HostConfiguration<BlockNumber>where
BlockNumber: Serialize,
source§impl<BlockNumber> TypeInfo for HostConfiguration<BlockNumber>where
BlockNumber: TypeInfo + 'static,
SchedulerParams<BlockNumber>: TypeInfo + 'static,
impl<BlockNumber> TypeInfo for HostConfiguration<BlockNumber>where
BlockNumber: TypeInfo + 'static,
SchedulerParams<BlockNumber>: TypeInfo + 'static,
impl<BlockNumber> EncodeLike for HostConfiguration<BlockNumber>where
BlockNumber: Encode,
SchedulerParams<BlockNumber>: Encode,
impl<BlockNumber> StructuralPartialEq for HostConfiguration<BlockNumber>
Auto Trait Implementations§
impl<BlockNumber> Freeze for HostConfiguration<BlockNumber>where
BlockNumber: Freeze,
impl<BlockNumber> RefUnwindSafe for HostConfiguration<BlockNumber>where
BlockNumber: RefUnwindSafe,
impl<BlockNumber> Send for HostConfiguration<BlockNumber>where
BlockNumber: Send,
impl<BlockNumber> Sync for HostConfiguration<BlockNumber>where
BlockNumber: Sync,
impl<BlockNumber> Unpin for HostConfiguration<BlockNumber>where
BlockNumber: Unpin,
impl<BlockNumber> UnwindSafe for HostConfiguration<BlockNumber>where
BlockNumber: UnwindSafe,
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