mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 15:07:59 +00:00
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>
76 lines
1.9 KiB
WebAssembly Text Format
76 lines
1.9 KiB
WebAssembly Text Format
(module
|
|
(import "seal0" "seal_balance" (func $seal_balance (param i32 i32)))
|
|
(import "seal0" "seal_minimum_balance" (func $seal_minimum_balance (param i32 i32)))
|
|
(import "seal0" "seal_transfer" (func $seal_transfer (param i32 i32 i32 i32) (result i32)))
|
|
(import "env" "memory" (memory 1 1))
|
|
|
|
;; [0, 8) reserved for $seal_balance output
|
|
|
|
;; [8, 16) length of the buffer for $seal_balance
|
|
(data (i32.const 8) "\08")
|
|
|
|
;; [16, 24) reserved for $seal_minimum_balance
|
|
|
|
;; [24, 32) length of the buffer for $seal_minimum_balance
|
|
(data (i32.const 24) "\08")
|
|
|
|
;; [32, inf) zero initialized
|
|
|
|
(func $assert (param i32)
|
|
(block $ok
|
|
(br_if $ok
|
|
(local.get 0)
|
|
)
|
|
(unreachable)
|
|
)
|
|
)
|
|
|
|
(func (export "deploy"))
|
|
|
|
(func (export "call")
|
|
;; Send entire remaining balance to the 0 address.
|
|
(call $seal_balance (i32.const 0) (i32.const 8))
|
|
|
|
;; Balance should be encoded as a u64.
|
|
(call $assert
|
|
(i32.eq
|
|
(i32.load (i32.const 8))
|
|
(i32.const 8)
|
|
)
|
|
)
|
|
|
|
;; Get the minimum balance.
|
|
(call $seal_minimum_balance (i32.const 16) (i32.const 24))
|
|
|
|
;; Minimum balance should be encoded as a u64.
|
|
(call $assert
|
|
(i32.eq
|
|
(i32.load (i32.const 24))
|
|
(i32.const 8)
|
|
)
|
|
)
|
|
|
|
;; Make the transferred value exceed the balance by adding the minimum balance.
|
|
(i64.store (i32.const 0)
|
|
(i64.add
|
|
(i64.load (i32.const 0))
|
|
(i64.load (i32.const 16))
|
|
)
|
|
)
|
|
|
|
;; Try to self-destruct by sending more balance to the 0 address.
|
|
;; The call will fail because a contract transfer has a keep alive requirement
|
|
(call $assert
|
|
(i32.eq
|
|
(call $seal_transfer
|
|
(i32.const 32) ;; Pointer to destination address
|
|
(i32.const 48) ;; Length of destination address
|
|
(i32.const 0) ;; Pointer to the buffer with value to transfer
|
|
(i32.const 8) ;; Length of the buffer with value to transfer
|
|
)
|
|
(i32.const 5) ;; ReturnCode::TransferFailed
|
|
)
|
|
)
|
|
)
|
|
)
|