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Remove Parent Hash to Session mapping (#928)

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* Adds a SigningContext type

* Bump spec versions

* Fixes requested changes

* Bump ParachainHost api_version and guard signing_context call

* Improve error message

* If there is no signing_context api use default value

Co-authored-by: Robert Habermeier <rphmeier@gmail.com>
This commit is contained in:
Fedor Sakharov
2020-03-26 00:04:05 +03:00
committed by GitHub
parent 62cddd6fcb
commit dbb4e987fa
15 changed files with 252 additions and 159 deletions
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polkadot/primitives/Cargo.toml
+2
View File
@@ -13,6 +13,7 @@ application-crypto = { package = "sp-application-crypto", git = "https://github.
sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
sp-std = { package = "sp-std", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
sp-staking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
runtime_primitives = { package = "sp-runtime", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
polkadot-parachain = { path = "../parachain", default-features = false }
trie = { package = "sp-trie", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -33,6 +34,7 @@ std = [
"sp-api/std",
"sp-std/std",
"sp-version/std",
"sp-staking/std",
"runtime_primitives/std",
"serde",
"polkadot-parachain/std",
polkadot/primitives/src/parachain.rs
+12 -1
View File
@@ -608,6 +608,15 @@ pub enum ValidityAttestation {
Explicit(ValidatorSignature),
}
/// A type returned by runtime with current session index and a parent hash.
#[derive(Clone, Eq, PartialEq, Default, Decode, Encode, RuntimeDebug)]
pub struct SigningContext {
/// Current session index.
pub session_index: sp_staking::SessionIndex,
/// Hash of the parent.
pub parent_hash: Hash,
}
/// An attested candidate. This is submitted to the relay chain by a block author.
#[derive(Clone, PartialEq, Decode, Encode, RuntimeDebug)]
pub struct AttestedCandidate {
@@ -655,7 +664,7 @@ impl FeeSchedule {
sp_api::decl_runtime_apis! {
/// The API for querying the state of parachains on-chain.
#[api_version(2)]
#[api_version(3)]
pub trait ParachainHost {
/// Get the current validators.
fn validators() -> Vec<ValidatorId>;
@@ -673,6 +682,8 @@ sp_api::decl_runtime_apis! {
/// Extract the abridged head that was set in the extrinsics.
fn get_heads(extrinsics: Vec<<Block as BlockT>::Extrinsic>)
-> Option<Vec<AbridgedCandidateReceipt>>;
/// Get a `SigningContext` with current `SessionIndex` and parent hash.
fn signing_context() -> SigningContext;
}
}