Support custom extension options when building tx

.changelog/unreleased/features/ibc-relayer/2566-extension-options.md

@@ -0,0 +1,2 @@
+- Support custom extension options to be able to specify `max_priority_price` for Ethermint dynamic tx fee
+  ([#2566](https://github.com/informalsystems/ibc-rs/issues/2566))

relayer/src/chain/cosmos/encode.rs

@@ -45,7 +45,8 @@ pub fn sign_tx(
 
     let signer = encode_signer_info(&config.address_type, account.sequence, key_bytes)?;
 
-    let (body, body_bytes) = tx_body_and_bytes(messages, tx_memo)?;
+    let (body, body_bytes) =
+        tx_body_and_bytes(messages, tx_memo, config.extension_options.clone())?;
 
     let (auth_info, auth_info_bytes) = auth_info_and_bytes(signer, fee.clone())?;
 
@@ -159,13 +160,17 @@ fn auth_info_and_bytes(signer_info: SignerInfo, fee: Fee) -> Result<(AuthInfo, V
     Ok((auth_info, auth_buf))
 }
 
-fn tx_body_and_bytes(proto_msgs: Vec<Any>, memo: &Memo) -> Result<(TxBody, Vec<u8>), Error> {
+fn tx_body_and_bytes(
+    proto_msgs: Vec<Any>,
+    memo: &Memo,
+    extension_options: Vec<Any>,
+) -> Result<(TxBody, Vec<u8>), Error> {
     // Create TxBody
     let body = TxBody {
         messages: proto_msgs.to_vec(),
         memo: memo.to_string(),
         timeout_height: 0_u64,
-        extension_options: Vec::<Any>::new(),
+        extension_options,
         non_critical_extension_options: Vec::<Any>::new(),
     };
 

relayer/src/chain/cosmos/types/config.rs

@@ -2,6 +2,7 @@ use core::str::FromStr;
 use core::time::Duration;
 use http::Uri;
 use ibc::core::ics24_host::identifier::ChainId;
+use ibc_proto::google::protobuf::Any;
 use tendermint_rpc::{HttpClient, Url};
 
 use crate::chain::cosmos::types::gas::GasConfig;
@@ -17,6 +18,7 @@ pub struct TxConfig {
     pub grpc_address: Uri,
     pub rpc_timeout: Duration,
     pub address_type: AddressType,
+    pub extension_options: Vec<Any>,
 }
 
 impl<'a> TryFrom<&'a ChainConfig> for TxConfig {
@@ -31,6 +33,12 @@ impl<'a> TryFrom<&'a ChainConfig> for TxConfig {
 
         let gas_config = GasConfig::from(config);
 
+        let extension_options = config
+            .extension_options
+            .iter()
+            .map(|opt| opt.to_any())
+            .collect::<Result<_, _>>()?;
+
         Ok(Self {
             chain_id: config.id.clone(),
             gas_config,
@@ -39,6 +47,7 @@ impl<'a> TryFrom<&'a ChainConfig> for TxConfig {
             grpc_address,
             rpc_timeout: config.rpc_timeout,
             address_type: config.address_type.clone(),
+            extension_options,
         })
     }
 }

relayer/src/chain/mock.rs

@@ -515,6 +515,7 @@ pub mod test_utils {
             address_type: AddressType::default(),
             memo_prefix: Default::default(),
             proof_specs: Default::default(),
+            extension_options: Default::default(),
             sequential_batch_tx: false,
         }
     }

relayer/src/config.rs

@@ -9,6 +9,7 @@ use alloc::collections::BTreeMap;
 use core::{fmt, time::Duration};
 use std::{fs, fs::File, io::Write, path::Path};
 
+use ibc_proto::google::protobuf::Any;
 use serde_derive::{Deserialize, Serialize};
 use tendermint_light_client_verifier::types::TrustThreshold;
 
@@ -18,6 +19,8 @@ use ibc::timestamp::ZERO_DURATION;
 
 use crate::chain::ChainType;
 use crate::config::types::{MaxMsgNum, MaxTxSize, Memo};
+use crate::error::Error as RelayerError;
+use crate::extension_options::ExtensionOptionDynamicFeeTx;
 use crate::keyring::Store;
 
 pub use error::Error;
@@ -42,6 +45,42 @@ impl fmt::Display for GasPrice {
     }
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(
+    rename_all = "snake_case",
+    tag = "type",
+    content = "value",
+    deny_unknown_fields
+)]
+pub enum ExtensionOption {
+    EthermintDynamicFee(String),
+}
+
+impl ExtensionOption {
+    pub fn to_any(&self) -> Result<Any, RelayerError> {
+        match self {
+            Self::EthermintDynamicFee(max_priority_price) => ExtensionOptionDynamicFeeTx {
+                max_priority_price: max_priority_price.into(),
+            }
+            .to_any(),
+        }
+    }
+}
+
+impl fmt::Display for ExtensionOption {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::EthermintDynamicFee(max_priority_price) => {
+                write!(
+                    f,
+                    "EthermintDynamicFee(max_priority_price: {})",
+                    max_priority_price
+                )
+            }
+        }
+    }
+}
+
 /// Defaults for various fields
 pub mod default {
     use super::*;
@@ -383,6 +422,8 @@ pub struct ChainConfig {
     pub packet_filter: PacketFilter,
     #[serde(default)]
     pub address_type: AddressType,
+    #[serde(default = "Vec::new", skip_serializing_if = "Vec::is_empty")]
+    pub extension_options: Vec<ExtensionOption>,
 }
 
 /// Attempt to load and parse the TOML config file as a `Config`.

relayer/src/extension_options.rs

@@ -0,0 +1,25 @@
+use ibc_proto::google::protobuf::Any;
+use prost::Message;
+use serde_derive::{Deserialize, Serialize};
+
+use crate::error::Error;
+
+// ExtensionOptionDynamicFeeTx is an extension option used with ethermint dynamic fee tx.
+// protobuf message: https://github.com/evmos/ethermint/blob/main/proto/ethermint/types/v1/dynamic_fee.proto
+#[derive(Clone, PartialEq, Eq, Message, Serialize, Deserialize)]
+pub struct ExtensionOptionDynamicFeeTx {
+    #[prost(string, tag = "1")]
+    pub max_priority_price: ::prost::alloc::string::String,
+}
+
+impl ExtensionOptionDynamicFeeTx {
+    pub fn to_any(&self) -> Result<Any, Error> {
+        let mut buf = Vec::new();
+        Message::encode(self, &mut buf)
+            .map_err(|e| Error::protobuf_encode("ExtensionOptionDynamicFeeTx".into(), e))?;
+        Ok(Any {
+            type_url: "/ethermint.types.v1.ExtensionOptionDynamicFeeTx".to_string(),
+            value: buf,
+        })
+    }
+}

relayer/src/lib.rs

@@ -29,6 +29,7 @@ pub mod connection;
 pub mod denom;
 pub mod error;
 pub mod event;
+pub mod extension_options;
 pub mod foreign_client;
 pub mod keyring;
 pub mod light_client;

tools/test-framework/src/relayer/tx.rs

@@ -61,6 +61,8 @@ pub fn new_tx_config_for_test(
 
     let address_type = Default::default();
 
+    let extension_options = Default::default();
+
     Ok(TxConfig {
         chain_id,
         gas_config,
@@ -69,6 +71,7 @@ pub fn new_tx_config_for_test(
         grpc_address,
         rpc_timeout,
         address_type,
+        extension_options,
     })
 }
 

tools/test-framework/src/types/single/node.rs

@@ -151,6 +151,7 @@ impl FullNode {
             address_type: Default::default(),
             memo_prefix: Default::default(),
             proof_specs: Default::default(),
+            extension_options: Default::default(),
             sequential_batch_tx: false,
         })
     }