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Clean up PersistedValidationData (#2353)

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* PVD: `block_number`->`relay_parent_number`

* ValidationParams: `relay_chain_height`->`relay_parent_number`

* Expose DMQ MQC hash as a well-known-key

This way the relay storage merkle proofs will be able to obtain the DMQ
MQC hash and we will be able to remove the it from the
PersistedValidationData struct.

* PersistedValidationData: Remove HRMP MQC heads

* PersistedValidationData: Remove `dmq_mqc_head`

* Expose the HRMP ingress channel index as a well-known-key

This way a parachain (PVF and collator) can find all the parachains that
have an outbound channel to the given one. That allows in turn to find
all the inbound channels for the given para.

Having access to that allows the parachain to get the same information
as the hrmp_mqc_heads now provide.

* Rename `relay_storage_root` to `relay_parent_storage_root`
This commit is contained in:
Sergei Shulepov
2021-02-02 17:35:13 +01:00
committed by GitHub
parent 16b250d7ea
commit d4fdbf7db9
17 changed files with 112 additions and 100 deletions
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polkadot/primitives/src/v1.rs
+35 -11
View File
@@ -119,6 +119,22 @@ pub mod well_known_keys {
})
}
/// The list of inbound channels for the given para.
///
/// The storage entry stores a `Vec<ParaId>`
pub fn hrmp_ingress_channel_index(para_id: Id) -> Vec<u8> {
let prefix = hex!["6a0da05ca59913bc38a8630590f2627c1d3719f5b0b12c7105c073c507445948"];
para_id.using_encoded(|para_id: &[u8]| {
prefix.as_ref()
.iter()
.chain(twox_64(para_id).iter())
.chain(para_id.iter())
.cloned()
.collect()
})
}
/// The list of outbound channels for the given para.
///
/// The storage entry stores a `Vec<ParaId>`
@@ -134,6 +150,23 @@ pub mod well_known_keys {
.collect()
})
}
/// The MQC head for the downward message queue of the given para. See more in the `Dmp` module.
///
/// The storage entry stores a `Hash`. This is polkadot hash which is at the moment
/// `blake2b-256`.
pub fn dmq_mqc_head(para_id: Id) -> Vec<u8> {
let prefix = hex!["63f78c98723ddc9073523ef3beefda0c4d7fefc408aac59dbfe80a72ac8e3ce5"];
para_id.using_encoded(|para_id: &[u8]| {
prefix.as_ref()
.iter()
.chain(twox_64(para_id).iter())
.chain(para_id.iter())
.cloned()
.collect()
})
}
}
/// Unique identifier for the Inclusion Inherent
@@ -360,18 +393,9 @@ pub struct PersistedValidationData<N = BlockNumber> {
/// The parent head-data.
pub parent_head: HeadData,
/// The relay-chain block number this is in the context of.
pub block_number: N,
pub relay_parent_number: N,
/// The relay-chain block storage root this is in the context of.
pub relay_storage_root: Hash,
/// The list of MQC heads for the inbound channels paired with the sender para ids. This
/// vector is sorted ascending by the para id and doesn't contain multiple entries with the same
/// sender.
pub hrmp_mqc_heads: Vec<(Id, Hash)>,
/// The MQC head for the DMQ.
///
/// The DMQ MQC head will be used by the validation function to authorize the downward messages
/// passed by the collator.
pub dmq_mqc_head: Hash,
pub relay_parent_storage_root: Hash,
/// The maximum legal size of a POV block, in bytes.
pub max_pov_size: u32,
}