mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Alexandru Vasile
7430f41350
This PR ensures that the chainHead RPC class can be called only from within the same connection context. The chainHead methods are now registered as raw methods. - https://github.com/paritytech/jsonrpsee/pull/1297 The concept of raw methods is introduced in jsonrpsee, which is an async method that exposes the connection ID: The raw method doesn't have the concept of a blocking method. Previously blocking methods are now spawning a blocking task to handle their blocking (ie DB) access. We spawn the same number of tasks as before, however we do that explicitly. Another approach would be implementing a RPC middleware that captures and decodes the method parameters: - https://github.com/paritytech/polkadot-sdk/pull/3343 However, that approach is prone to errors since the methods are hardcoded by name. Performace is affected by the double deserialization that needs to happen to extract the subscription ID we'd like to limit. Once from the middleware, and once from the methods itself. This PR paves the way to implement the chainHead connection limiter: - https://github.com/paritytech/polkadot-sdk/issues/1505 Registering tokens (subscription ID / operation ID) on the `RpcConnections` could be extended to return an error when the maximum number of operations is reached. While at it, have added an integration-test to ensure that chainHead methods can be called from within the same connection context. Before this is merged, a new JsonRPC release should be made to expose the `raw-methods`: - [x] Use jsonrpsee from crates io (blocked by: https://github.com/paritytech/jsonrpsee/pull/1297) Closes: https://github.com/paritytech/polkadot-sdk/issues/3207 cc @paritytech/subxt-team --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>
19 lines
753 B
Rust
19 lines
753 B
Rust
// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//! Common types and functionality for the RPC-V2 spec.
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pub mod connections;
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pub mod events;
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pub mod storage;
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