feat: core gRPC services

crates/ibc/Cargo.toml

@@ -38,6 +38,8 @@ std = [
 parity-scale-codec = ["dep:parity-scale-codec", "dep:scale-info", "ibc-proto/parity-scale-codec"]
 borsh = ["dep:borsh", "ibc-proto/borsh"]
 
+grpc = ["dep:tonic", "ibc-proto/server"]
+
 # This feature is required for token transfer (ICS-20)
 serde = ["dep:serde", "dep:serde_derive", "serde_json", "ics23/serde"]
 
@@ -67,6 +69,7 @@ num-traits = { version = "0.2.15", default-features = false }
 derive_more = { version = "0.99.17", default-features = false, features = ["from", "into", "display", "try_into"] }
 uint = { version = "0.9", default-features = false }
 primitive-types = { version = "0.12.0", default-features = false, features = ["serde_no_std"] }
+tonic = { version = "0.9", optional = true }
 
 ## for codec encode or decode
 parity-scale-codec = { version = "3.0.0", default-features = false, features = ["full"], optional = true }

crates/ibc/src/core/context.rs

@@ -21,8 +21,7 @@ use crate::core::ics04_channel::error::ChannelError;
 use crate::core::ics04_channel::error::PacketError;
 use crate::core::ics04_channel::packet::{Receipt, Sequence};
 use crate::core::ics23_commitment::commitment::CommitmentPrefix;
-use crate::core::ics24_host::identifier::ClientId;
-use crate::core::ics24_host::identifier::ConnectionId;
+use crate::core::ics24_host::identifier::{ClientId, ConnectionId};
 use crate::core::ics24_host::path::{
     AckPath, ChannelEndPath, ClientConnectionPath, ClientConsensusStatePath, CommitmentPath,
     ConnectionPath, ReceiptPath, SeqAckPath, SeqRecvPath, SeqSendPath,

crates/ibc/src/core/handler.rs

@@ -51,11 +51,7 @@ pub fn dispatch(
 /// That is, the state transition of message `i` must be applied before
 /// message `i+1` is validated. This is equivalent to calling
 /// `dispatch()` on each successively.
-pub fn validate<Ctx>(
-    ctx: &Ctx,
-    router: &mut impl Router,
-    msg: MsgEnvelope,
-) -> Result<(), RouterError>
+pub fn validate<Ctx>(ctx: &Ctx, router: &impl Router, msg: MsgEnvelope) -> Result<(), RouterError>
 where
     Ctx: ValidationContext,
 {

crates/ibc/src/core/ics04_channel/error.rs

@@ -171,6 +171,8 @@ pub enum PacketError {
     },
     /// Cannot encode sequence `{sequence}`
     CannotEncodeSequence { sequence: Sequence },
+    /// other error: `{description}`
+    Other { description: String },
 }
 
 impl From<IdentifierError> for ChannelError {

crates/ibc/src/lib.rs

@@ -53,6 +53,9 @@ pub mod clients;
 pub mod core;
 pub mod hosts;
 
+#[cfg(feature = "grpc")]
+pub mod services;
+
 #[cfg(any(test, feature = "mocks"))]
 pub mod mock;
 #[cfg(any(test, feature = "mocks"))]

crates/ibc/src/prelude.rs

@@ -4,6 +4,7 @@ pub use core::prelude::v1::*;
 // https://doc.rust-lang.org/src/alloc/prelude/v1.rs.html
 pub use alloc::borrow::ToOwned;
 pub use alloc::boxed::Box;
+pub use alloc::str::FromStr;
 pub use alloc::string::{String, ToString};
 pub use alloc::vec::Vec;