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* update ismp implementation * chore * fix faulty host implementation * fix no-std * updated failing tests * some changes --------- Co-authored-by: Seun Lanlege <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| // Copyright (C) 2023 Polytope Labs. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| //! Implementation for the ISMP Router | ||
| use crate::{host::Host, Config, Event, OutgoingRequestAcks, OutgoingResponseAcks, Pallet}; | ||
| use alloc::string::ToString; | ||
| use codec::{Decode, Encode}; | ||
| use core::marker::PhantomData; | ||
| use ismp_primitives::mmr::Leaf; | ||
| use ismp_rs::{ | ||
| host::IsmpHost, | ||
| router::{ | ||
| DispatchError, DispatchRequest, DispatchResult, DispatchSuccess, Get, IsmpDispatcher, Post, | ||
| PostResponse, Request, Response, | ||
| }, | ||
| util::{hash_request, hash_response}, | ||
| }; | ||
| use sp_core::H256; | ||
|
|
||
| /// A receipt or an outgoing or incoming request or response | ||
| #[derive(Encode, Decode, scale_info::TypeInfo)] | ||
| pub enum Receipt { | ||
| /// Ok | ||
| Ok, | ||
| } | ||
|
|
||
| /// The dispatcher commits outgoing requests and responses to the mmr | ||
| pub struct Dispatcher<T>(PhantomData<T>); | ||
|
|
||
| impl<T> Default for Dispatcher<T> { | ||
| fn default() -> Self { | ||
| Self(PhantomData) | ||
| } | ||
| } | ||
|
|
||
| impl<T> IsmpDispatcher for Dispatcher<T> | ||
| where | ||
| T: Config, | ||
| <T as frame_system::Config>::Hash: From<H256>, | ||
| { | ||
| fn dispatch_request(&self, request: DispatchRequest) -> DispatchResult { | ||
| let host = Host::<T>::default(); | ||
| let request = match request { | ||
| DispatchRequest::Get(dispatch_get) => { | ||
| let get = Get { | ||
| source_chain: host.host_state_machine(), | ||
| dest_chain: dispatch_get.dest_chain, | ||
| nonce: host.next_nonce(), | ||
| from: dispatch_get.from, | ||
| keys: dispatch_get.keys, | ||
| height: dispatch_get.height, | ||
| timeout_timestamp: dispatch_get.timeout_timestamp, | ||
| }; | ||
| Request::Get(get) | ||
| } | ||
| DispatchRequest::Post(dispatch_post) => { | ||
| let post = Post { | ||
| source_chain: host.host_state_machine(), | ||
| dest_chain: dispatch_post.dest_chain, | ||
| nonce: host.next_nonce(), | ||
| from: dispatch_post.from, | ||
| to: dispatch_post.to, | ||
| timeout_timestamp: dispatch_post.timeout_timestamp, | ||
| data: dispatch_post.data, | ||
| }; | ||
| Request::Post(post) | ||
| } | ||
| }; | ||
|
|
||
| let commitment = hash_request::<Host<T>>(&request).0.to_vec(); | ||
|
|
||
| let (dest_chain, source_chain, nonce) = | ||
| (request.dest_chain(), request.source_chain(), request.nonce()); | ||
| Pallet::<T>::mmr_push(Leaf::Request(request)).ok_or_else(|| DispatchError { | ||
| msg: "Failed to push request into mmr".to_string(), | ||
| nonce, | ||
| source: source_chain, | ||
| dest: dest_chain, | ||
| })?; | ||
| // Deposit Event | ||
| Pallet::<T>::deposit_event(Event::Request { | ||
| request_nonce: nonce, | ||
| source_chain, | ||
| dest_chain, | ||
| }); | ||
| // We need this step since it's not trivial to check the mmr for commitments on chain | ||
| OutgoingRequestAcks::<T>::insert(commitment, Receipt::Ok); | ||
| Ok(DispatchSuccess { dest_chain, source_chain, nonce }) | ||
| } | ||
|
|
||
| fn dispatch_response(&self, response: PostResponse) -> DispatchResult { | ||
| let response = Response::Post(response); | ||
|
|
||
| let commitment = hash_response::<Host<T>>(&response).0.to_vec(); | ||
|
|
||
| if OutgoingResponseAcks::<T>::contains_key(commitment.clone()) { | ||
| Err(DispatchError { | ||
| msg: "Duplicate response".to_string(), | ||
| nonce: response.nonce(), | ||
| source: response.source_chain(), | ||
| dest: response.dest_chain(), | ||
| })? | ||
| } | ||
|
|
||
| let (dest_chain, source_chain, nonce) = | ||
| (response.dest_chain(), response.source_chain(), response.nonce()); | ||
|
|
||
| Pallet::<T>::mmr_push(Leaf::Response(response)).ok_or_else(|| DispatchError { | ||
| msg: "Failed to push response into mmr".to_string(), | ||
| nonce, | ||
| source: source_chain, | ||
| dest: dest_chain, | ||
| })?; | ||
|
|
||
| Pallet::<T>::deposit_event(Event::Response { | ||
| request_nonce: nonce, | ||
| dest_chain, | ||
| source_chain, | ||
| }); | ||
| OutgoingResponseAcks::<T>::insert(commitment, Receipt::Ok); | ||
| Ok(DispatchSuccess { dest_chain, source_chain, nonce }) | ||
| } | ||
| } |
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