polytope-labs · seunlanlege · Jul 24, 2025 · Jul 26, 2025 · Jul 28, 2025 · Jul 29, 2025
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -4,6 +4,8 @@ members = [
     # runtime
     "parachain/runtimes/gargantua",
     "parachain/runtimes/nexus",
+    # for testing pallet-revive
+    "parachain/runtimes/messier",
 
     # node
     "parachain/node",
@@ -19,6 +21,7 @@ members = [
     "modules/pallets/demo",
     "modules/pallets/testsuite",
     "modules/pallets/call-decompressor",
+    "modules/pallets/revive-dispatcher",
     "modules/pallets/xcm-gateway",
     "modules/pallets/token-governor",
     "modules/pallets/token-gateway",
@@ -187,7 +190,7 @@ futures = "0.3.28"
 async-trait = "0.1.53"
 reqwest-chain = "0.1.0"
 reqwest-middleware = "0.2.4"
-reqwest = { version="0.11.14", features=["json"]}
+reqwest = { version = "0.11.14", features = ["json"] }
 
 # arkworks
 ark-ec = { version = "0.4.2", default-features = false }
@@ -203,6 +206,7 @@ ismp-parachain = { version = "2506.0.0", path = "./modules/ismp/clients/parachai
 ismp-parachain-inherent = { version = "2506.0.0", path = "./modules/ismp/clients/parachain/inherent" }
 ismp-parachain-runtime-api = { version = "2506.0.0", path = "./modules/ismp/clients/parachain/runtime-api", default-features = false }
 pallet-ismp = { version = "2506.0.0", path = "modules/pallets/ismp", default-features = false }
+pallet-revive-ismp-dispatcher = { version = "2506.0.0", path = "modules/pallets/revive-dispatcher", default-features = false }
 pallet-ismp-rpc = { version = "2506.0.0", path = "modules/pallets/ismp/rpc" }
 pallet-ismp-runtime-api = { version = "2506.0.0", path = "modules/pallets/ismp/runtime-api", default-features = false }
 pallet-hyperbridge = { version = "2506.0.0", path = "modules/pallets/hyperbridge", default-features = false }

diff --git a/modules/pallets/call-decompressor/Cargo.toml b/modules/pallets/call-decompressor/Cargo.toml
@@ -16,7 +16,7 @@ log = { workspace = true }
 
 # polytope labs
 ismp = { workspace = true }
-pallet-ismp = { workspace = true, features = ["unsigned"] }
+pallet-ismp = { workspace = true }
 pallet-ismp-relayer = { workspace = true }
 
 [dependencies.polkadot-sdk]

diff --git a/modules/pallets/hyperbridge/src/lib.rs b/modules/pallets/hyperbridge/src/lib.rs
@@ -218,7 +218,7 @@ where
 						Preservation::Expendable,
 					)
 					.map_err(|err| {
-						ismp::Error::Custom(format!("Error withdrawing request fees: {err:?}"))
+						ismp::Error::Custom(format!("Error withdrawing protocol fees: {err:?}"))
 					})?;
 				}
 
@@ -263,7 +263,7 @@ where
 				Preservation::Expendable,
 			)
 			.map_err(|err| {
-				ismp::Error::Custom(format!("Error withdrawing request fees: {err:?}"))
+				ismp::Error::Custom(format!("Error withdrawing protocol fees: {err:?}"))
 			})?;
 		}
 

diff --git a/modules/pallets/ismp/Cargo.toml b/modules/pallets/ismp/Cargo.toml
@@ -64,4 +64,4 @@ runtime-benchmarks = [
     "polkadot-sdk/frame-benchmarking",
 ]
 try-runtime = ["polkadot-sdk/try-runtime"]
-unsigned = []
+
diff --git a/modules/pallets/ismp/src/dispatcher.rs b/modules/pallets/ismp/src/dispatcher.rs
@@ -79,7 +79,7 @@ where
 				fee.fee,
 				Preservation::Expendable,
 			)
-			.map_err(|err| IsmpError::Custom(format!("Error withdrawing request fees: {err:?}")))?;
+			.map_err(|err| IsmpError::Custom(format!("Error withdrawing relayer fees: {err:?}")))?;
 		}
 
 		let request = match request {
@@ -140,7 +140,7 @@ where
 				fee.fee,
 				Preservation::Expendable,
 			)
-			.map_err(|err| IsmpError::Custom(format!("Error withdrawing request fees: {err:?}")))?;
+			.map_err(|err| IsmpError::Custom(format!("Error withdrawing relayer fees: {err:?}")))?;
 		}
 
 		let req_commitment = hash_request::<Pallet<T>>(&response.request());
@@ -235,7 +235,7 @@ impl<T: Config> IsmpModule for RefundingModule<T> {
 						Preservation::Expendable,
 					)
 					.map_err(|err| {
-						IsmpError::Custom(format!("Error withdrawing request fees: {err:?}"))
+						IsmpError::Custom(format!("Error withdrawing relayer fees: {err:?}"))
 					})?;
 				}
 			}

diff --git a/modules/pallets/ismp/src/lib.rs b/modules/pallets/ismp/src/lib.rs
@@ -56,8 +56,6 @@ pub mod pallet {
 		PalletId,
 	};
 	use frame_system::pallet_prelude::{BlockNumberFor, *};
-	#[cfg(feature = "unsigned")]
-	use ismp::messaging::Message;
 	use ismp::{
 		consensus::{
 			ConsensusClientId, ConsensusStateId, StateCommitment, StateMachineHeight,
@@ -66,17 +64,16 @@ pub mod pallet {
 		events::{RequestResponseHandled, TimeoutHandled},
 		handlers,
 		host::{IsmpHost, StateMachine},
-		messaging::CreateConsensusState,
+		messaging::{CreateConsensusState, Message},
 		router::IsmpRouter,
 	};
 	use sp_core::{storage::ChildInfo, H256};
-	#[cfg(feature = "unsigned")]
-	use sp_runtime::transaction_validity::{
-		InvalidTransaction, TransactionSource, TransactionValidity, TransactionValidityError,
-		ValidTransaction,
-	};
 	use sp_runtime::{
 		traits::{AccountIdConversion, AtLeast32BitUnsigned},
+		transaction_validity::{
+			InvalidTransaction, TransactionSource, TransactionValidity, TransactionValidityError,
+			ValidTransaction,
+		},
 		FixedPointOperand,
 	};
 	use sp_std::prelude::*;
@@ -301,7 +298,6 @@ pub mod pallet {
 		/// - `messages`: the messages to handle or process.
 		///
 		/// Emits different message events based on the Message received if successful.
-		#[cfg(feature = "unsigned")]
 		#[pallet::weight(weight())]
 		#[pallet::call_index(0)]
 		#[frame_support::transactional]
@@ -502,7 +498,6 @@ pub mod pallet {
 	}
 
 	/// This allows users execute ISMP datagrams for free. Use with caution.
-	#[cfg(feature = "unsigned")]
 	#[pallet::validate_unsigned]
 	impl<T: Config> ValidateUnsigned for Pallet<T> {
 		type Call = Call<T>;

diff --git a/modules/pallets/revive-dispatcher/Cargo.toml b/modules/pallets/revive-dispatcher/Cargo.toml
@@ -0,0 +1,67 @@
+[package]
+name = "pallet-revive-ismp-dispatcher"
+version = "2506.0.0"
+edition = "2021"
+description = "IsmpDispatcher precompile implementation for pallet-revive"
+authors = ["Polytope Labs <[email protected]>"]
+license = "Apache-2.0"
+repository = "https://github.com/polytope-labs/hyperbridge"
+documentation = "https://docs.rs/pallet-revive-ismp-dispatcher"
+keywords = ["pallet-revive", "pallet-ismp", "ismp", "polkadot-sdk", "pallet-ismp", "Risc-v", "evm"]
+readme = "./README.md"
+
+[lib]
+doctest = false
+
+[dependencies]
+alloy-rlp = { workspace = true }
+num-traits = { version = "0.2.19", default-features = false }
+ruint = { version = "1.15.0", features = ["num-traits"], default-features = false }
+scale-info = { workspace = true }
+codec = { workspace = true }
+log = { workspace = true }
+ismp = { workspace = true }
+pallet-ismp = { workspace = true }
+pallet-hyperbridge = { workspace = true }
+hex = { workspace = true }
+
+[dependencies.polkadot-sdk]
+workspace = true
+features = [
+    "frame-support",
+    "frame-system",
+    "sp-runtime",
+    "sp-core",
+    "sp-std",
+    "sp-io",
+    "pallet-revive",
+]
+
+[dev-dependencies]
+anyhow = { workspace = true }
+hex-literal = { workspace = true }
+polkadot-sdk = { workspace = true, features = [
+    "std",
+    "pallet-balances",
+    "pallet-assets",
+    "pallet-timestamp",
+    "pallet-transaction-payment",
+    "sp-io",
+] }
+pallet-hyperbridge = { workspace = true, default-features = true }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"ruint/std",
+    "num-traits/std",
+    "log/std",
+    "polkadot-sdk/std",
+    "scale-info/std",
+    "num-traits/std",
+    "ismp/std",
+    "pallet-ismp/std",
+    "alloy-rlp/std",
+]
+try-runtime = ["polkadot-sdk/try-runtime"]
diff --git a/modules/pallets/revive-dispatcher/README.md b/modules/pallets/revive-dispatcher/README.md
@@ -0,0 +1,41 @@
+# pallet-revive-ismp-dispatcher
+
+ISMP dispatcher precompile implementation for pallet-revive.
+
+## Overview
+
+The `pallet-revive-ismp-dispatcher` provides a precompile interface for PolkaVM contracts to dispatch ISMP (Interoperable State Machine Protocol) messages. This pallet focuses exclusively on outgoing message dispatch functionality, enabling contracts to:
+
+- Dispatch POST requests to other chains
+- Dispatch GET requests for cross-chain state queries
+- Dispatch responses to incoming requests
+- Fund existing requests and responses with additional fees
+- Query configuration parameters like fee tokens and per-byte fees
+
+## Interface
+
+The dispatcher exposes the following core functionality:
+
+### Configuration Queries
+- `host()` - Returns the host state machine identifier
+- `hyperbridge()` - Returns the connected hyperbridge instance identifier
+- `nonce()` - Returns the next available nonce for requests
+- `feeToken()` - Returns the configured fee token address
+- `perByteFee(bytes dest)` - Returns the per-byte fee for the destination chain
+
+### Message Dispatch
+- `dispatch(DispatchPost)` - Dispatches a POST request
+- `dispatch(DispatchGet)` - Dispatches a GET request
+- `dispatch(DispatchPostResponse)` - Dispatches a response to a POST request
+
+### Fee Management
+- `fundRequest(bytes32 commitment, uint256 amount)` - Adds additional fees to a pending request
+- `fundResponse(bytes32 commitment, uint256 amount)` - Adds additional fees to a pending response
+
+## Usage
+
+This pallet is designed to be used as a precompile in pallet-revive based runtimes. Contracts can interact with it at the fixed address `0xD27` (3367 in decimal).
+
+## License
+
+This project is licensed under the Apache License 2.0. See the LICENSE file for details.