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chainHead: Add support for storage pagination and cancellation (#14755)

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* chainHead/api: Add `chain_head_unstable_continue` method

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscriptions: Register operations for pagination

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscriptions: Merge limits with registered operation

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscriptions: Expose the operation state

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chain_head/storage: Generate WaitingForContinue event

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead: Use the continue operation

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/tests: Adjust testing to the new storage interface

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/config: Make pagination limit configurable

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/tests: Adjust chainHeadConfig

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/tests: Check pagination and continue method

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/api: Add `chainHead_unstable_stopOperation` method

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscription: Add shared atomic state for efficient alloc

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead: Implement operation stop

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/tests: Check that storage ops can be cancelled

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/storage: Change docs for query_storage_iter_pagination

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscriptions: Fix merge conflicts

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead: Replace `async-channel` with `tokio::sync`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* chainHead/subscription: Add comment about the sender/recv continue

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
This commit is contained in:
Alexandru Vasile
2023-08-24 14:32:30 +03:00
committed by GitHub
parent dbb48a5ba2
commit 2e6a2ffa8a
6 changed files with 751 additions and 154 deletions
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substrate/client/rpc-spec-v2/src/chain_head/api.rs
+27
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@@ -119,4 +119,31 @@ pub trait ChainHeadApi<Hash> {
/// This method is unstable and subject to change in the future.
#[method(name = "chainHead_unstable_unpin", blocking)]
fn chain_head_unstable_unpin(&self, follow_subscription: String, hash: Hash) -> RpcResult<()>;
/// Resumes a storage fetch started with `chainHead_storage` after it has generated an
/// `operationWaitingForContinue` event.
///
/// # Unstable
///
/// This method is unstable and subject to change in the future.
#[method(name = "chainHead_unstable_continue", blocking)]
fn chain_head_unstable_continue(
&self,
follow_subscription: String,
operation_id: String,
) -> RpcResult<()>;
/// Stops an operation started with chainHead_unstable_body, chainHead_unstable_call, or
/// chainHead_unstable_storage. If the operation was still in progress, this interrupts it. If
/// the operation was already finished, this call has no effect.
///
/// # Unstable
///
/// This method is unstable and subject to change in the future.
#[method(name = "chainHead_unstable_stopOperation", blocking)]
fn chain_head_unstable_stop_operation(
&self,
follow_subscription: String,
operation_id: String,
) -> RpcResult<()>;
}