routers: Use correct formatting for H160 addresses

pallets/liquidity-pools-gateway/routers/Cargo.toml

@@ -11,6 +11,7 @@ version = "0.0.1"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
+hex = { version = "0.4.3", default-features = false }
 codec = { package = "parity-scale-codec", version = "3.0.0", features = ["derive"], default-features = false }
 frame-support = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-v0.9.38" }
 frame-system = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-v0.9.38" }

pallets/liquidity-pools-gateway/routers/src/routers/axelar_evm.rs

@@ -15,7 +15,7 @@ use ethabi::{Contract, Function, Param, ParamType, Token};
 use frame_support::dispatch::{DispatchError, DispatchResult};
 use frame_system::pallet_prelude::OriginFor;
 use scale_info::{
-	prelude::string::{String, ToString},
+	prelude::{format, string::String},
 	TypeInfo,
 };
 use sp_core::{bounded::BoundedVec, ConstU32, H160};
@@ -75,7 +75,7 @@ where
 
 /// Encodes the provided message into the format required for submitting it
 /// to the Axelar contract which in turn calls the LiquidityPools
-/// contract with the serialized LP message a payload.
+/// contract with the serialized LP message as `payload`.
 ///
 /// Axelar contract call:
 /// <https://github.com/axelarnetwork/axelar-cgp-solidity/blob/v4.3.2/contracts/AxelarGateway.sol#L78>
@@ -127,7 +127,11 @@ pub(crate) fn get_axelar_encoded_msg(
 		Token::String(
 			String::from_utf8(target_chain).map_err(|_| "target chain conversion error")?,
 		),
-		Token::String(target_contract.to_string()),
+		// Ensure that the target contract is correctly converted to hex.
+		//
+		// The `to_string` method on the H160 is returning a string containing an ellipsis, such
+		// as: 0x1234…7890
+		Token::String(format!("0x{}", hex::encode(target_contract.0))),
 		Token::Bytes(serialized_msg),
 	])
 	.map_err(|_| "cannot encode input for Axelar contract function")?;