mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Aaro Altonen
e71c484d5b
This commit introduces a new concept called `NotificationService` which allows Polkadot protocols to communicate with the underlying notification protocol implementation directly, without routing events through `NetworkWorker`. This implies that each protocol has its own service which it uses to communicate with remote peers and that each `NotificationService` is unique with respect to the underlying notification protocol, meaning `NotificationService` for the transaction protocol can only be used to send and receive transaction-related notifications. The `NotificationService` concept introduces two additional benefits: * allow protocols to start using custom handshakes * allow protocols to accept/reject inbound peers Previously the validation of inbound connections was solely the responsibility of `ProtocolController`. This caused issues with light peers and `SyncingEngine` as `ProtocolController` would accept more peers than `SyncingEngine` could accept which caused peers to have differing views of their own states. `SyncingEngine` would reject excess peers but these rejections were not properly communicated to those peers causing them to assume that they were accepted. With `NotificationService`, the local handshake is not sent to remote peer if peer is rejected which allows it to detect that it was rejected. This commit also deprecates the use of `NetworkEventStream` for all notification-related events and going forward only DHT events are provided through `NetworkEventStream`. If protocols wish to follow each other's events, they must introduce additional abtractions, as is done for GRANDPA and transactions protocols by following the syncing protocol through `SyncEventStream`. Fixes https://github.com/paritytech/polkadot-sdk/issues/512 Fixes https://github.com/paritytech/polkadot-sdk/issues/514 Fixes https://github.com/paritytech/polkadot-sdk/issues/515 Fixes https://github.com/paritytech/polkadot-sdk/issues/554 Fixes https://github.com/paritytech/polkadot-sdk/issues/556 --- These changes are transferred from https://github.com/paritytech/substrate/pull/14197 but there are no functional changes compared to that PR --------- Co-authored-by: Dmitry Markin <dmitry@markin.tech> Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
56 lines
1.6 KiB
WebAssembly Text Format
56 lines
1.6 KiB
WebAssembly Text Format
;; This contract:
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;; 1) Reads signature and message hash from the input
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;; 2) Calls ecdsa_recover
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;; 3) Validates that result is Success
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;; 4) Returns recovered compressed public key
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(module
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(import "seal0" "seal_ecdsa_recover" (func $seal_ecdsa_recover (param i32 i32 i32) (result i32)))
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(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
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(import "seal0" "seal_input" (func $seal_input (param i32 i32)))
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(import "env" "memory" (memory 1 1))
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(func $assert (param i32)
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(block $ok
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(br_if $ok
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(local.get 0)
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)
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(unreachable)
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)
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)
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(func (export "deploy"))
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;; [4, 8) len of signature + message hash - 65 bytes + 32 byte = 97 bytes
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(data (i32.const 4) "\61")
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;; Memory layout during `call`
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;; [10, 75) signature
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;; [75, 107) message hash
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(func (export "call")
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(local $signature_ptr i32)
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(local $message_hash_ptr i32)
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(local $result i32)
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(local.set $signature_ptr (i32.const 10))
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(local.set $message_hash_ptr (i32.const 75))
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;; Read signature and message hash - 97 bytes
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(call $seal_input (local.get $signature_ptr) (i32.const 4))
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(local.set
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$result
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(call $seal_ecdsa_recover
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(local.get $signature_ptr)
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(local.get $message_hash_ptr)
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(local.get $signature_ptr) ;; Store output into message signature ptr, because we don't need it anymore
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)
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)
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(call $assert
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(i32.eq
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(local.get $result) ;; The result of recovery execution
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(i32.const 0x0) ;; 0x0 - Success result
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)
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)
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;; exit with success and return recovered public key
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(call $seal_return (i32.const 0) (local.get $signature_ptr) (i32.const 33))
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)
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)
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