# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json

title: backpressured JSON-RPC server (upgrade jsonrpsee)

doc:
  - audience: Node Operator
    description: |
      Modifies the jsonrpc server to be "backpressured" and it's possible to configure
      how many messages can be "buffered" via the CLI `--rpc_message_buffer_capacity`.

      Major changes in this PR:
        - The subscriptions are now bounded and if subscription can't keep up with the server it is dropped
        - CLI: add parameter to configure the jsonrpc server bounded message buffer (default is 64)
        - Add our own subscription helper to deal with the unbounded streams in substrate

crates: 
- name: sc-rpc-server