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Move create_inherents into the block-builder (#6553)

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* Move `create_inherents` into the block-builder

This moves the `create_inherents` call into the block-builder. This has
the advantage that `create_inherents` will be able to reuse the same
context that will be used when applying the extrinsics and we also save
one call to `on_initialize`. To make sure that `create_inherents` does
not modify any state, we execute it in a transaction that is
rolled-back after doing the runtime call.

* Feedback and build fix

* Update primitives/runtime/src/lib.rs

Co-authored-by: Sergei Shulepov <sergei@parity.io>

* Update client/block-builder/src/lib.rs

Co-authored-by: Sergei Shulepov <sergei@parity.io>
This commit is contained in:
Bastian Köcher
2020-07-02 15:17:14 +02:00
committed by GitHub
parent e1d0f84c67
commit 4f7f312be5
9 changed files with 78 additions and 48 deletions
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substrate/primitives/api/src/lib.rs
+9 -9
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@@ -58,7 +58,7 @@ pub use sp_runtime::{
Block as BlockT, GetNodeBlockType, GetRuntimeBlockType, HashFor, NumberFor,
Header as HeaderT, Hash as HashT,
},
generic::BlockId, transaction_validity::TransactionValidity, RuntimeString,
generic::BlockId, transaction_validity::TransactionValidity, RuntimeString, TransactionOutcome,
};
#[doc(hidden)]
pub use sp_core::{offchain, ExecutionContext};
@@ -356,15 +356,15 @@ pub trait ApiExt<Block: BlockT>: ApiErrorExt {
/// The state backend that is used to store the block states.
type StateBackend: StateBackend<HashFor<Block>>;
/// The given closure will be called with api instance. Inside the closure any api call is
/// allowed. After doing the api call, the closure is allowed to map the `Result` to a
/// different `Result` type. This can be important, as the internal data structure that keeps
/// track of modifications to the storage, discards changes when the `Result` is an `Err`.
/// On `Ok`, the structure commits the changes to an internal buffer.
fn map_api_result<F: FnOnce(&Self) -> result::Result<R, E>, R, E>(
/// Execute the given closure inside a new transaction.
///
/// Depending on the outcome of the closure, the transaction is committed or rolled-back.
///
/// The internal result of the closure is returned afterwards.
fn execute_in_transaction<F: FnOnce(&Self) -> TransactionOutcome<R>, R>(
&self,
map_call: F,
) -> result::Result<R, E> where Self: Sized;
call: F,
) -> R where Self: Sized;
/// Checks if the given api is implemented and versions match.
fn has_api<A: RuntimeApiInfo + ?Sized>(