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handler.rs
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handler.rs
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use prost_types::Any;
use tendermint_proto::Protobuf;
use crate::application::ics20_fungible_token_transfer::msgs::transfer;
use crate::application::ics20_fungible_token_transfer::relay_application_logic::send_transfer::send_transfer as ics20_msg_dispatcher;
use crate::ics02_client::handler::dispatch as ics2_msg_dispatcher;
use crate::ics02_client::msgs::{create_client, update_client, ClientMsg};
use crate::ics03_connection::handler::dispatch as ics3_msg_dispatcher;
use crate::ics03_connection::msgs::{
conn_open_ack, conn_open_confirm, conn_open_init, conn_open_try, ConnectionMsg,
};
use crate::ics04_channel::handler::channel_dispatch as ics4_msg_dispatcher;
use crate::ics04_channel::handler::packet_dispatch as ics04_packet_msg_dispatcher;
use crate::{events::IbcEvent, handler::HandlerOutput};
use crate::ics04_channel::msgs::{
acknowledgement, chan_close_confirm, chan_close_init, chan_open_ack, chan_open_confirm,
chan_open_init, chan_open_try, recv_packet, timeout, timeout_on_close, ChannelMsg, PacketMsg,
};
use crate::ics26_routing::context::Ics26Context;
use crate::ics26_routing::error::{Error, Kind};
use crate::ics26_routing::msgs::Ics26Envelope::{
self, Ics20Msg, Ics2Msg, Ics3Msg, Ics4ChannelMsg, Ics4PacketMsg,
};
/// Mimics the DeliverTx ABCI interface, but a slightly lower level. No need for authentication
/// info or signature checks here.
/// https://github.com/cosmos/cosmos-sdk/tree/master/docs/basics
/// Returns a vector of all events that got generated as a byproduct of processing `messages`.
pub fn deliver<Ctx>(ctx: &mut Ctx, messages: Vec<Any>) -> Result<Vec<IbcEvent>, Error>
where
Ctx: Ics26Context,
{
// Create a clone, which will store each intermediary stage of applying txs.
let mut ctx_interim = ctx.clone();
// A buffer for all the events, to be used as return value.
let mut res: Vec<IbcEvent> = vec![];
for any_msg in messages {
// Decode the proto message into a domain message, creating an ICS26 envelope.
let envelope = match any_msg.type_url.as_str() {
// ICS2 messages
create_client::TYPE_URL => {
// Pop out the message and then wrap it in the corresponding type.
let domain_msg = create_client::MsgCreateAnyClient::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics2Msg(ClientMsg::CreateClient(domain_msg)))
}
update_client::TYPE_URL => {
let domain_msg = update_client::MsgUpdateAnyClient::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics2Msg(ClientMsg::UpdateClient(domain_msg)))
}
// ICS03
conn_open_init::TYPE_URL => {
let domain_msg = conn_open_init::MsgConnectionOpenInit::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics3Msg(ConnectionMsg::ConnectionOpenInit(domain_msg)))
}
conn_open_try::TYPE_URL => {
let domain_msg = conn_open_try::MsgConnectionOpenTry::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics3Msg(ConnectionMsg::ConnectionOpenTry(Box::new(
domain_msg,
))))
}
conn_open_ack::TYPE_URL => {
let domain_msg = conn_open_ack::MsgConnectionOpenAck::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics3Msg(ConnectionMsg::ConnectionOpenAck(Box::new(
domain_msg,
))))
}
conn_open_confirm::TYPE_URL => {
let domain_msg =
conn_open_confirm::MsgConnectionOpenConfirm::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics3Msg(ConnectionMsg::ConnectionOpenConfirm(domain_msg)))
}
// ICS04 channel messages
chan_open_init::TYPE_URL => {
let domain_msg = chan_open_init::MsgChannelOpenInit::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelOpenInit(domain_msg)))
}
chan_open_try::TYPE_URL => {
let domain_msg = chan_open_try::MsgChannelOpenTry::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelOpenTry(domain_msg)))
}
chan_open_ack::TYPE_URL => {
let domain_msg = chan_open_ack::MsgChannelOpenAck::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelOpenAck(domain_msg)))
}
chan_open_confirm::TYPE_URL => {
let domain_msg =
chan_open_confirm::MsgChannelOpenConfirm::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelOpenConfirm(domain_msg)))
}
chan_close_init::TYPE_URL => {
let domain_msg = chan_close_init::MsgChannelCloseInit::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelCloseInit(domain_msg)))
}
chan_close_confirm::TYPE_URL => {
let domain_msg =
chan_close_confirm::MsgChannelCloseConfirm::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4ChannelMsg(ChannelMsg::ChannelCloseConfirm(domain_msg)))
}
// ICS20 - 04 - Send packet
transfer::TYPE_URL => {
let domain_msg = transfer::MsgTransfer::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics20Msg(domain_msg))
}
// ICS04 packet messages
recv_packet::TYPE_URL => {
let domain_msg = recv_packet::MsgRecvPacket::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4PacketMsg(PacketMsg::RecvPacket(domain_msg)))
}
acknowledgement::TYPE_URL => {
let domain_msg = acknowledgement::MsgAcknowledgement::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4PacketMsg(PacketMsg::AckPacket(domain_msg)))
}
timeout::TYPE_URL => {
let domain_msg = timeout::MsgTimeout::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4PacketMsg(PacketMsg::ToPacket(domain_msg)))
}
timeout_on_close::TYPE_URL => {
let domain_msg = timeout_on_close::MsgTimeoutOnClose::decode_vec(&any_msg.value)
.map_err(|e| Kind::MalformedMessageBytes.context(e))?;
Ok(Ics4PacketMsg(PacketMsg::ToClosePacket(domain_msg)))
}
_ => Err(Kind::UnknownMessageTypeUrl(any_msg.type_url)),
}?;
// Process the envelope, and accumulate any events that were generated.
let mut output = dispatch(&mut ctx_interim, envelope)?;
// TODO: output.log and output.result are discarded
res.append(&mut output.events);
}
// No error has surfaced, so we now apply the changes permanently to the original context.
*ctx = ctx_interim;
Ok(res)
}
/// Top-level ICS dispatch function. Routes incoming IBC messages to their corresponding module.
/// Returns a handler output with empty result of type `HandlerOutput<()>` which contains the log
/// and events produced after processing the input `msg`.
pub fn dispatch<Ctx>(ctx: &mut Ctx, msg: Ics26Envelope) -> Result<HandlerOutput<()>, Error>
where
Ctx: Ics26Context,
{
let output = match msg {
Ics2Msg(msg) => {
let handler_output =
ics2_msg_dispatcher(ctx, msg).map_err(|e| Kind::HandlerRaisedError.context(e))?;
// Apply the result to the context (host chain store).
ctx.store_client_result(handler_output.result)
.map_err(|e| Kind::KeeperRaisedError.context(e))?;
HandlerOutput::builder()
.with_log(handler_output.log)
.with_events(handler_output.events)
.with_result(())
}
Ics3Msg(msg) => {
let handler_output =
ics3_msg_dispatcher(ctx, msg).map_err(|e| Kind::HandlerRaisedError.context(e))?;
// Apply any results to the host chain store.
ctx.store_connection_result(handler_output.result)
.map_err(|e| Kind::KeeperRaisedError.context(e))?;
HandlerOutput::builder()
.with_log(handler_output.log)
.with_events(handler_output.events)
.with_result(())
}
Ics4ChannelMsg(msg) => {
let handler_output =
ics4_msg_dispatcher(ctx, msg).map_err(|e| Kind::HandlerRaisedError.context(e))?;
// Apply any results to the host chain store.
ctx.store_channel_result(handler_output.result)
.map_err(|e| Kind::KeeperRaisedError.context(e))?;
HandlerOutput::builder()
.with_log(handler_output.log)
.with_events(handler_output.events)
.with_result(())
}
Ics20Msg(msg) => {
let handler_output =
ics20_msg_dispatcher(ctx, msg).map_err(|e| Kind::HandlerRaisedError.context(e))?;
// Apply any results to the host chain store.
ctx.store_packet_result(handler_output.result)
.map_err(|e| Kind::KeeperRaisedError.context(e))?;
HandlerOutput::builder()
.with_log(handler_output.log)
.with_events(handler_output.events)
.with_result(())
}
Ics4PacketMsg(msg) => {
let handler_output = ics04_packet_msg_dispatcher(ctx, msg)
.map_err(|e| Kind::HandlerRaisedError.context(e))?;
// Apply any results to the host chain store.
ctx.store_packet_result(handler_output.result)
.map_err(|e| Kind::KeeperRaisedError.context(e))?;
HandlerOutput::builder()
.with_log(handler_output.log)
.with_events(handler_output.events)
.with_result(())
}
};
Ok(output)
}
#[cfg(test)]
mod tests {
use std::convert::TryFrom;
use crate::application::ics20_fungible_token_transfer::msgs::transfer::test_util::get_dummy_msg_transfer;
use crate::events::IbcEvent;
use crate::ics02_client::client_consensus::AnyConsensusState;
use crate::ics02_client::client_state::AnyClientState;
use crate::ics02_client::msgs::{
create_client::MsgCreateAnyClient, update_client::MsgUpdateAnyClient, ClientMsg,
};
use crate::ics03_connection::msgs::{
conn_open_ack::{test_util::get_dummy_raw_msg_conn_open_ack, MsgConnectionOpenAck},
conn_open_init::{test_util::get_dummy_raw_msg_conn_open_init, MsgConnectionOpenInit},
conn_open_try::{test_util::get_dummy_raw_msg_conn_open_try, MsgConnectionOpenTry},
ConnectionMsg,
};
use crate::ics04_channel::msgs::{
chan_close_confirm::{
test_util::get_dummy_raw_msg_chan_close_confirm, MsgChannelCloseConfirm,
},
chan_close_init::{test_util::get_dummy_raw_msg_chan_close_init, MsgChannelCloseInit},
chan_open_ack::{test_util::get_dummy_raw_msg_chan_open_ack, MsgChannelOpenAck},
chan_open_init::{test_util::get_dummy_raw_msg_chan_open_init, MsgChannelOpenInit},
chan_open_try::{test_util::get_dummy_raw_msg_chan_open_try, MsgChannelOpenTry},
recv_packet::{test_util::get_dummy_raw_msg_recv_packet, MsgRecvPacket},
timeout_on_close::{test_util::get_dummy_raw_msg_timeout_on_close, MsgTimeoutOnClose},
ChannelMsg, PacketMsg,
};
use crate::ics24_host::identifier::ConnectionId;
use crate::ics26_routing::handler::dispatch;
use crate::ics26_routing::msgs::Ics26Envelope;
use crate::mock::client_state::{MockClientState, MockConsensusState};
use crate::mock::context::MockContext;
use crate::mock::header::MockHeader;
use crate::test_utils::get_dummy_account_id;
use crate::Height;
#[test]
/// These tests exercise two main paths: (1) the ability of the ICS26 routing module to dispatch
/// messages to the correct module handler, and more importantly: (2) the ability of ICS handlers
/// to work with the context and correctly store results (i.e., the `ClientKeeper`,
/// `ConnectionKeeper`, and `ChannelKeeper` traits).
fn routing_module_and_keepers() {
// Test parameters
struct Test {
name: String,
msg: Ics26Envelope,
want_pass: bool,
}
let default_signer = get_dummy_account_id();
let client_height = 5;
let start_client_height = Height::new(0, client_height);
let update_client_height = Height::new(0, 34);
let update_client_height_after_send = Height::new(0, 35);
let update_client_height_after_second_send = Height::new(0, 36);
// We reuse this same context across all tests. Nothing in particular needs parametrizing.
let mut ctx = MockContext::default();
let create_client_msg = MsgCreateAnyClient::new(
AnyClientState::from(MockClientState(MockHeader::new(start_client_height))),
AnyConsensusState::from(MockConsensusState(MockHeader::new(start_client_height))),
default_signer.clone(),
)
.unwrap();
//
// Connection handshake messages.
//
let msg_conn_init =
MsgConnectionOpenInit::try_from(get_dummy_raw_msg_conn_open_init()).unwrap();
let correct_msg_conn_try = MsgConnectionOpenTry::try_from(get_dummy_raw_msg_conn_open_try(
client_height,
client_height,
))
.unwrap();
// The handler will fail to process this msg because the client height is too advanced.
let incorrect_msg_conn_try = MsgConnectionOpenTry::try_from(
get_dummy_raw_msg_conn_open_try(client_height + 1, client_height + 1),
)
.unwrap();
let msg_conn_ack = MsgConnectionOpenAck::try_from(get_dummy_raw_msg_conn_open_ack(
client_height,
client_height,
))
.unwrap();
//
// Channel handshake messages.
//
let msg_chan_init =
MsgChannelOpenInit::try_from(get_dummy_raw_msg_chan_open_init()).unwrap();
// The handler will fail to process this b/c the associated connection does not exist
let mut incorrect_msg_chan_init = msg_chan_init.clone();
incorrect_msg_chan_init.channel.connection_hops = vec![ConnectionId::new(590)];
let msg_chan_try =
MsgChannelOpenTry::try_from(get_dummy_raw_msg_chan_open_try(client_height)).unwrap();
let msg_chan_ack =
MsgChannelOpenAck::try_from(get_dummy_raw_msg_chan_open_ack(client_height)).unwrap();
let msg_chan_close_init =
MsgChannelCloseInit::try_from(get_dummy_raw_msg_chan_close_init()).unwrap();
let msg_chan_close_confirm =
MsgChannelCloseConfirm::try_from(get_dummy_raw_msg_chan_close_confirm(client_height))
.unwrap();
let msg_transfer = get_dummy_msg_transfer(35);
let msg_transfer_two = get_dummy_msg_transfer(36);
let mut msg_to_on_close =
MsgTimeoutOnClose::try_from(get_dummy_raw_msg_timeout_on_close(36, 5)).unwrap();
msg_to_on_close.packet.sequence = 2.into();
msg_to_on_close.packet.timeout_height = msg_transfer_two.timeout_height;
msg_to_on_close.packet.timeout_timestamp = msg_transfer_two.timeout_timestamp;
let msg_recv_packet = MsgRecvPacket::try_from(get_dummy_raw_msg_recv_packet(35)).unwrap();
// First, create a client..
let res = dispatch(
&mut ctx,
Ics26Envelope::Ics2Msg(ClientMsg::CreateClient(create_client_msg.clone())),
);
assert_eq!(
true,
res.is_ok(),
"ICS26 routing dispatch test 'client creation' failed for message {:?} with result: {:?}",
create_client_msg,
res
);
ctx.add_port(msg_chan_init.port_id().clone());
// Figure out the ID of the client that was just created.
let mut events = res.unwrap().events;
let client_id_event = events.pop();
assert!(
client_id_event.is_some(),
"There was no event generated for client creation!"
);
let client_id = match client_id_event.unwrap() {
IbcEvent::CreateClient(create_client) => create_client.client_id().clone(),
event => panic!("unexpected IBC event: {:?}", event),
};
let tests: Vec<Test> = vec![
// Test some ICS2 client functionality.
Test {
name: "Client update successful".to_string(),
msg: Ics26Envelope::Ics2Msg(ClientMsg::UpdateClient(MsgUpdateAnyClient {
client_id: client_id.clone(),
header: MockHeader::new(update_client_height).into(),
signer: default_signer.clone(),
})),
want_pass: true,
},
Test {
name: "Client update fails due to stale header".to_string(),
msg: Ics26Envelope::Ics2Msg(ClientMsg::UpdateClient(MsgUpdateAnyClient {
client_id: client_id.clone(),
header: MockHeader::new(update_client_height).into(),
signer: default_signer.clone(),
})),
want_pass: false,
},
Test {
name: "Connection open init succeeds".to_string(),
msg: Ics26Envelope::Ics3Msg(ConnectionMsg::ConnectionOpenInit(
msg_conn_init.with_client_id(client_id.clone()),
)),
want_pass: true,
},
Test {
name: "Connection open try fails due to InvalidConsensusHeight (too high)"
.to_string(),
msg: Ics26Envelope::Ics3Msg(ConnectionMsg::ConnectionOpenTry(Box::new(
incorrect_msg_conn_try,
))),
want_pass: false,
},
Test {
name: "Connection open try succeeds".to_string(),
msg: Ics26Envelope::Ics3Msg(ConnectionMsg::ConnectionOpenTry(Box::new(
correct_msg_conn_try.with_client_id(client_id.clone()),
))),
want_pass: true,
},
Test {
name: "Connection open ack succeeds".to_string(),
msg: Ics26Envelope::Ics3Msg(ConnectionMsg::ConnectionOpenAck(Box::new(
msg_conn_ack,
))),
want_pass: true,
},
// ICS04
Test {
name: "Channel open init succeeds".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelOpenInit(msg_chan_init)),
want_pass: true,
},
Test {
name: "Channel open init fail due to missing connection".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelOpenInit(
incorrect_msg_chan_init,
)),
want_pass: false,
},
Test {
name: "Channel open try succeeds".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelOpenTry(msg_chan_try)),
want_pass: true,
},
Test {
name: "Channel open ack succeeds".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelOpenAck(msg_chan_ack)),
want_pass: true,
},
//ICS20-04-packet
Test {
name: "Packet send".to_string(),
msg: Ics26Envelope::Ics20Msg(msg_transfer),
want_pass: true,
},
// The client update is required in this test, because the proof associated with
// msg_recv_packet has the same height as the packet TO height (see get_dummy_raw_msg_recv_packet)
Test {
name: "Client update successful".to_string(),
msg: Ics26Envelope::Ics2Msg(ClientMsg::UpdateClient(MsgUpdateAnyClient {
client_id: client_id.clone(),
header: MockHeader::new(update_client_height_after_send).into(),
signer: default_signer.clone(),
})),
want_pass: true,
},
Test {
name: "Receive packet".to_string(),
msg: Ics26Envelope::Ics4PacketMsg(PacketMsg::RecvPacket(msg_recv_packet.clone())),
want_pass: true,
},
Test {
name: "Re-Receive packet".to_string(),
msg: Ics26Envelope::Ics4PacketMsg(PacketMsg::RecvPacket(msg_recv_packet)),
want_pass: false,
},
Test {
name: "Packet send".to_string(),
msg: Ics26Envelope::Ics20Msg(msg_transfer_two),
want_pass: true,
},
Test {
name: "Client update successful".to_string(),
msg: Ics26Envelope::Ics2Msg(ClientMsg::UpdateClient(MsgUpdateAnyClient {
client_id,
header: MockHeader::new(update_client_height_after_second_send).into(),
signer: default_signer,
})),
want_pass: true,
},
//ICS04-close channel
Test {
name: "Channel close init succeeds".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelCloseInit(
msg_chan_close_init,
)),
want_pass: true,
},
Test {
name: "Channel close confirm fails cause channel is already closed".to_string(),
msg: Ics26Envelope::Ics4ChannelMsg(ChannelMsg::ChannelCloseConfirm(
msg_chan_close_confirm,
)),
want_pass: false,
},
//ICS04-to_on_close
Test {
name: "Timeout on close".to_string(),
msg: Ics26Envelope::Ics4PacketMsg(PacketMsg::ToClosePacket(msg_to_on_close)),
want_pass: true,
},
]
.into_iter()
.collect();
for test in tests {
let res = dispatch(&mut ctx, test.msg.clone());
assert_eq!(
test.want_pass,
res.is_ok(),
"ICS26 routing dispatch test '{}' failed for message {:?}\nwith result: {:?}",
test.name,
test.msg,
res
);
}
}
}