add Serai JSON-RPC methods (#627)

* add serai rpc methods

* fix machete & dex quote price api

* fix validators api

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

Cargo.lock

@@ -9421,7 +9421,9 @@ dependencies = [
  "jsonrpsee",
  "libp2p 0.52.4",
  "log",
+ "monero-wallet",
  "pallet-transaction-payment-rpc",
+ "parity-scale-codec",
  "rand_core",
  "sc-authority-discovery",
  "sc-basic-authorship",
@@ -9893,7 +9895,6 @@ dependencies = [
  "serai-dex-pallet",
  "serai-primitives",
  "serai-validator-sets-primitives",
- "serde",
  "sp-application-crypto",
  "sp-consensus-babe",
  "sp-core",

substrate/client/Cargo.toml

@@ -50,7 +50,7 @@ hex = "0.4"
 
 blake2 = "0.10"
 
-ciphersuite = { path = "../../crypto/ciphersuite", features = ["ristretto"] }
+ciphersuite = { path = "../../crypto/ciphersuite", features = ["ristretto", "secp256k1"] }
 frost = { package = "modular-frost", path = "../../crypto/frost", features = ["tests"] }
 schnorrkel = { path = "../../crypto/schnorrkel", package = "frost-schnorrkel" }
 

substrate/client/src/serai/mod.rs

@@ -16,7 +16,8 @@ pub use abi::{primitives, Transaction};
 use abi::*;
 
 pub use primitives::{SeraiAddress, Signature, Amount};
-use primitives::{Header, ExternalNetworkId};
+use primitives::{Header, NetworkId, ExternalNetworkId, QuotePriceParams};
+use crate::in_instructions::primitives::Shorthand;
 
 pub mod coins;
 pub use coins::SeraiCoins;
@@ -317,6 +318,24 @@ impl Serai {
   ) -> Result<Vec<multiaddr::Multiaddr>, SeraiError> {
     self.call("p2p_validators", network).await
   }
+
+  // TODO: move this to SeraiValidatorSets?
+  pub async fn external_network_address(
+    &self,
+    network: ExternalNetworkId,
+  ) -> Result<String, SeraiError> {
+    self.call("external_network_address", network).await
+  }
+
+  // TODO: move this to SeraiInInstructions?
+  pub async fn encoded_shorthand(&self, shorthand: Shorthand) -> Result<Vec<u8>, SeraiError> {
+    self.call("encoded_shorthand", shorthand).await
+  }
+
+  // TODO: move this to SeraiDex?
+  pub async fn quote_price(&self, params: QuotePriceParams) -> Result<u64, SeraiError> {
+    self.call("quote_price", params).await
+  }
 }
 
 impl TemporalSerai<'_> {

substrate/client/src/serai/validator_sets.rs

@@ -179,7 +179,7 @@ impl SeraiValidatorSets<'_> {
     &self,
     network: NetworkId,
   ) -> Result<Vec<Public>, SeraiError> {
-    self.0.runtime_api("SeraiRuntimeApi_validators", network).await
+    self.0.runtime_api("ValidatorSetsApi_validators", network).await
   }
 
   // TODO: Store these separately since we almost never need both at once?

substrate/client/tests/serai-rpc.rs

@@ -0,0 +1,158 @@
+use std::str::FromStr;
+
+use scale::Decode;
+use zeroize::Zeroizing;
+
+use ciphersuite::{
+  group::{ff::Field, GroupEncoding},
+  Ciphersuite, Ed25519, Secp256k1,
+};
+
+use sp_core::{
+  Pair as PairTrait,
+  sr25519::{Public, Pair},
+};
+
+use serai_abi::{
+  in_instructions::primitives::Shorthand,
+  primitives::{
+    insecure_pair_from_name, ExternalBalance, ExternalCoin, ExternalNetworkId, QuotePriceParams,
+    Amount,
+  },
+  validator_sets::primitives::{ExternalValidatorSet, KeyPair, Session},
+};
+use serai_client::{Serai, SeraiAddress};
+
+use rand_core::{RngCore, OsRng};
+
+mod common;
+use common::{validator_sets::set_keys, in_instructions::mint_coin, dex::add_liquidity};
+
+serai_test!(
+  external_address: (|serai: Serai| async move {
+      test_external_address(serai).await;
+  })
+
+  encoded_shorthand: (|serai: Serai| async move {
+    test_encoded_shorthand(serai).await;
+  })
+
+  dex_quote_price: (|serai: Serai| async move {
+    test_dex_quote_price(serai).await;
+  })
+);
+
+async fn set_network_keys<C: Ciphersuite>(
+  serai: &Serai,
+  set: ExternalValidatorSet,
+  pairs: &[Pair],
+) {
+  // Ristretto key
+  let mut ristretto_key = [0; 32];
+  OsRng.fill_bytes(&mut ristretto_key);
+
+  // network key
+  let network_priv_key = Zeroizing::new(C::F::random(&mut OsRng));
+  let network_key = (C::generator() * *network_priv_key).to_bytes().as_ref().to_vec();
+
+  let key_pair = KeyPair(Public(ristretto_key), network_key.try_into().unwrap());
+  let _ = set_keys(serai, set, key_pair, pairs).await;
+}
+
+async fn test_external_address(serai: Serai) {
+  let pair = insecure_pair_from_name("Alice");
+
+  // set btc keys
+  let network = ExternalNetworkId::Bitcoin;
+  set_network_keys::<Secp256k1>(
+    &serai,
+    ExternalValidatorSet { session: Session(0), network },
+    &[pair.clone()],
+  )
+  .await;
+
+  // get the address from the node
+  let btc_address: String = serai.external_network_address(network).await.unwrap();
+
+  // make sure it is a valid address
+  let _ = bitcoin::Address::from_str(&btc_address)
+    .unwrap()
+    .require_network(bitcoin::Network::Bitcoin)
+    .unwrap();
+
+  // set monero keys
+  let network = ExternalNetworkId::Monero;
+  set_network_keys::<Ed25519>(
+    &serai,
+    ExternalValidatorSet { session: Session(0), network },
+    &[pair],
+  )
+  .await;
+
+  // get the address from the node
+  let xmr_address: String = serai.external_network_address(network).await.unwrap();
+
+  // make sure it is a valid address
+  let _ = monero_wallet::address::MoneroAddress::from_str(
+    monero_wallet::address::Network::Mainnet,
+    &xmr_address,
+  )
+  .unwrap();
+}
+
+async fn test_encoded_shorthand(serai: Serai) {
+  let shorthand = Shorthand::transfer(None, SeraiAddress::new([0u8; 32]));
+  let encoded = serai.encoded_shorthand(shorthand.clone()).await.unwrap();
+
+  assert_eq!(Shorthand::decode::<&[u8]>(&mut encoded.as_slice()).unwrap(), shorthand);
+}
+
+async fn test_dex_quote_price(serai: Serai) {
+  // make a liquid pool to get the quote on
+  let coin1 = ExternalCoin::Bitcoin;
+  let coin2 = ExternalCoin::Monero;
+  let amount1 = Amount(10u64.pow(coin1.decimals()));
+  let amount2 = Amount(10u64.pow(coin2.decimals()));
+  let pair = insecure_pair_from_name("Ferdie");
+
+  // mint sriBTC in the account so that we can add liq.
+  // Ferdie account is already pre-funded with SRI.
+  mint_coin(
+    &serai,
+    ExternalBalance { coin: coin1, amount: amount1 },
+    0,
+    pair.clone().public().into(),
+  )
+  .await;
+
+  // add liquidity
+  let coin_amount = Amount(amount1.0 / 2);
+  let sri_amount = Amount(amount1.0 / 2);
+  let _ = add_liquidity(&serai, coin1, coin_amount, sri_amount, 0, pair.clone()).await;
+
+  // same for xmr
+  mint_coin(
+    &serai,
+    ExternalBalance { coin: coin2, amount: amount2 },
+    0,
+    pair.clone().public().into(),
+  )
+  .await;
+
+  // add liquidity
+  let coin_amount = Amount(amount2.0 / 2);
+  let sri_amount = Amount(amount2.0 / 2);
+  let _ = add_liquidity(&serai, coin2, coin_amount, sri_amount, 1, pair.clone()).await;
+
+  // price for BTC -> SRI -> XMR path
+  let params = QuotePriceParams {
+    coin1: coin1.into(),
+    coin2: coin2.into(),
+    amount: coin_amount.0 / 2,
+    include_fee: true,
+    exact_in: true,
+  };
+
+  let res = serai.quote_price(params).await.unwrap();
+  assert!(res > 0);
+}

substrate/dex/pallet/src/lib.rs

@@ -999,6 +999,25 @@ pub mod pallet {
       Ok(amounts)
     }
 
+    fn get_swap_path_from_coins(
+      coin1: Coin,
+      coin2: Coin,
+    ) -> Option<BoundedVec<Coin, T::MaxSwapPathLength>> {
+      if coin1 == coin2 {
+        return None;
+      }
+
+      let path = if (coin1 == Coin::native() && coin2 != Coin::native()) ||
+        (coin2 == Coin::native() && coin1 != Coin::native())
+      {
+        vec![coin1, coin2]
+      } else {
+        vec![coin1, Coin::native(), coin2]
+      };
+
+      Some(path.try_into().unwrap())
+    }
+
     /// Used by the RPC service to provide current prices.
     pub fn quote_price_exact_tokens_for_tokens(
       coin1: Coin,
@@ -1006,20 +1025,24 @@ pub mod pallet {
       amount: SubstrateAmount,
       include_fee: bool,
     ) -> Option<SubstrateAmount> {
-      let pool_id = Self::get_pool_id(coin1, coin2).ok()?;
-      let pool_account = Self::get_pool_account(pool_id);
+      let path = Self::get_swap_path_from_coins(coin1, coin2)?;
 
-      let balance1 = Self::get_balance(&pool_account, coin1);
-      let balance2 = Self::get_balance(&pool_account, coin2);
-      if balance1 != 0 {
-        if include_fee {
-          Self::get_amount_out(amount, balance1, balance2).ok()
-        } else {
-          Self::quote(amount, balance1, balance2).ok()
+      let mut amounts: Vec<SubstrateAmount> = vec![amount];
+      for coins_pair in path.windows(2) {
+        if let [coin1, coin2] = coins_pair {
+          let (reserve_in, reserve_out) = Self::get_reserves(coin1, coin2).ok()?;
+          let prev_amount = amounts.last().expect("Always has at least one element");
+          let amount_out = if include_fee {
+            Self::get_amount_out(*prev_amount, reserve_in, reserve_out).ok()?
+          } else {
+            Self::quote(*prev_amount, reserve_in, reserve_out).ok()?
+          };
+
+          amounts.push(amount_out);
         }
-      } else {
-        None
       }
+
+      Some(*amounts.last().unwrap())
     }
 
     /// Used by the RPC service to provide current prices.
@@ -1029,20 +1052,23 @@ pub mod pallet {
       amount: SubstrateAmount,
       include_fee: bool,
     ) -> Option<SubstrateAmount> {
-      let pool_id = Self::get_pool_id(coin1, coin2).ok()?;
-      let pool_account = Self::get_pool_account(pool_id);
+      let path = Self::get_swap_path_from_coins(coin1, coin2)?;
 
-      let balance1 = Self::get_balance(&pool_account, coin1);
-      let balance2 = Self::get_balance(&pool_account, coin2);
-      if balance1 != 0 {
-        if include_fee {
-          Self::get_amount_in(amount, balance1, balance2).ok()
-        } else {
-          Self::quote(amount, balance2, balance1).ok()
+      let mut amounts: Vec<SubstrateAmount> = vec![amount];
+      for coins_pair in path.windows(2).rev() {
+        if let [coin1, coin2] = coins_pair {
+          let (reserve_in, reserve_out) = Self::get_reserves(coin1, coin2).ok()?;
+          let prev_amount = amounts.last().expect("Always has at least one element");
+          let amount_in = if include_fee {
+            Self::get_amount_in(*prev_amount, reserve_in, reserve_out).ok()?
+          } else {
+            Self::quote(*prev_amount, reserve_out, reserve_in).ok()?
+          };
+          amounts.push(amount_in);
         }
-      } else {
-        None
       }
+
+      Some(*amounts.last().unwrap())
     }
 
     /// Calculates the optimal amount from the reserves.

substrate/node/Cargo.toml

@@ -52,6 +52,8 @@ futures-util = "0.3"
 tokio = { version = "1", features = ["sync", "rt-multi-thread"] }
 jsonrpsee = { version = "0.16", features = ["server"] }
 
+scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
+
 sc-offchain = { git = "https://github.com/serai-dex/substrate" }
 sc-transaction-pool = { git = "https://github.com/serai-dex/substrate" }
 sc-transaction-pool-api = { git = "https://github.com/serai-dex/substrate" }
@@ -77,6 +79,11 @@ pallet-transaction-payment-rpc = { git = "https://github.com/serai-dex/substrate
 
 serai-env = { path = "../../common/env" }
 
+bitcoin-serai = { path = "../../networks/bitcoin", default-features = false, features = ["std", "hazmat"] }
+monero-wallet = { path = "../../networks/monero/wallet", default-features = false, features = ["std"] }
+ciphersuite = { path = "../../crypto/ciphersuite", default-features = false, features = ["ed25519", "secp256k1"] }
+curve25519-dalek = { version = "4", default-features = false, features = ["alloc", "zeroize"] }
+
 [build-dependencies]
 substrate-build-script-utils = { git = "https://github.com/serai-dex/substrate" }
 

substrate/node/src/rpc.rs

@@ -1,4 +1,4 @@
-use std::{sync::Arc, collections::HashSet};
+use std::{sync::Arc, ops::Deref, collections::HashSet};
 
 use rand_core::{RngCore, OsRng};
 
@@ -7,13 +7,17 @@ use sp_block_builder::BlockBuilder;
 use sp_api::ProvideRuntimeApi;
 
 use serai_runtime::{
-  primitives::{NetworkId, SubstrateAmount, PublicKey},
-  Nonce, Block, SeraiRuntimeApi,
+  in_instructions::primitives::Shorthand,
+  primitives::{ExternalNetworkId, NetworkId, PublicKey, SubstrateAmount, QuotePriceParams},
+  validator_sets::ValidatorSetsApi,
+  dex::DexApi,
+  Block, Nonce,
 };
 
 use tokio::sync::RwLock;
 
-use jsonrpsee::RpcModule;
+use jsonrpsee::{RpcModule, core::Error};
+use scale::Encode;
 
 pub use sc_rpc_api::DenyUnsafe;
 use sc_transaction_pool_api::TransactionPool;
@@ -40,11 +44,14 @@ pub fn create_full<
 where
   C::Api: substrate_frame_rpc_system::AccountNonceApi<Block, PublicKey, Nonce>
     + pallet_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, SubstrateAmount>
-    + SeraiRuntimeApi<Block>
+    + ValidatorSetsApi<Block>
+    + DexApi<Block>
     + BlockBuilder<Block>,
 {
   use substrate_frame_rpc_system::{System, SystemApiServer};
   use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApiServer};
+  use ciphersuite::{Ciphersuite, Ed25519, Secp256k1};
+  use bitcoin_serai::{bitcoin, crypto::x_only};
 
   let mut module = RpcModule::new(());
   let FullDeps { id, client, pool, deny_unsafe, authority_discovery } = deps;
@@ -54,7 +61,7 @@ where
 
   if let Some(authority_discovery) = authority_discovery {
     let mut authority_discovery_module =
-      RpcModule::new((id, client, RwLock::new(authority_discovery)));
+      RpcModule::new((id, client.clone(), RwLock::new(authority_discovery)));
     authority_discovery_module.register_async_method(
       "p2p_validators",
       |params, context| async move {
@@ -63,7 +70,7 @@ where
         let latest_block = client.info().best_hash;
 
         let validators = client.runtime_api().validators(latest_block, network).map_err(|_| {
-          jsonrpsee::core::Error::to_call_error(std::io::Error::other(format!(
+          Error::to_call_error(std::io::Error::other(format!(
             "couldn't get validators from the latest block, which is likely a fatal bug. {}",
             "please report this at https://github.com/serai-dex/serai/issues",
           )))
@@ -99,5 +106,95 @@ where
     module.merge(authority_discovery_module)?;
   }
 
+  let mut serai_json_module = RpcModule::new(client);
+
+  // add network address rpc
+  serai_json_module.register_async_method(
+    "external_network_address",
+    |params, context| async move {
+      let network: ExternalNetworkId = params.parse()?;
+      let client = &*context;
+      let latest_block = client.info().best_hash;
+
+      let external_key = client
+        .runtime_api()
+        .external_network_key(latest_block, network)
+        .map_err(|_| Error::Custom("api call error".to_string()))?
+        .ok_or(Error::Custom("no address for the network".to_string()))?;
+
+      match network {
+        ExternalNetworkId::Bitcoin => {
+          let key = <Secp256k1 as Ciphersuite>::read_G::<&[u8]>(&mut external_key.as_slice())
+            .map_err(|_| Error::Custom("invalid key stored in db".to_string()))?;
+
+          let addr = bitcoin::Address::p2tr_tweaked(
+            bitcoin::key::TweakedPublicKey::dangerous_assume_tweaked(x_only(&key)),
+            bitcoin::address::KnownHrp::Mainnet,
+          );
+
+          Ok(addr.to_string())
+        }
+        // We don't know the eth address before the smart contract is deployed.
+        ExternalNetworkId::Ethereum => Ok(String::new()),
+        ExternalNetworkId::Monero => {
+          let view_private = zeroize::Zeroizing::new(
+            <Ed25519 as Ciphersuite>::hash_to_F(
+              b"Serai DEX Additional Key",
+              &["Monero".as_bytes(), &0u64.to_le_bytes()].concat(),
+            )
+            .0,
+          );
+
+          let spend = <Ed25519 as Ciphersuite>::read_G::<&[u8]>(&mut external_key.as_slice())
+            .map_err(|_| Error::Custom("invalid key stored in db".to_string()))?;
+
+          let addr = monero_wallet::address::MoneroAddress::new(
+            monero_wallet::address::Network::Mainnet,
+            monero_wallet::address::AddressType::Featured {
+              subaddress: false,
+              payment_id: None,
+              guaranteed: true,
+            },
+            *spend,
+            view_private.deref() * curve25519_dalek::constants::ED25519_BASEPOINT_TABLE,
+          );
+
+          Ok(addr.to_string())
+        }
+      }
+    },
+  )?;
+
+  // add shorthand encoding rpc
+  serai_json_module.register_async_method("encoded_shorthand", |params, _| async move {
+    // decode using serde and encode back using scale
+    let shorthand: Shorthand = params.parse()?;
+    Ok(shorthand.encode())
+  })?;
+
+  // add simulating a swap path rpc
+  serai_json_module.register_async_method("quote_price", |params, context| async move {
+    let client = &*context;
+    let latest_block = client.info().best_hash;
+    let QuotePriceParams { coin1, coin2, amount, include_fee, exact_in } = params.parse()?;
+
+    let amount = if exact_in {
+      client
+        .runtime_api()
+        .quote_price_exact_tokens_for_tokens(latest_block, coin1, coin2, amount, include_fee)
+        .map_err(|_| Error::Custom("api call error".to_string()))?
+        .ok_or(Error::Custom("invalid params or empty pool".to_string()))?
+    } else {
+      client
+        .runtime_api()
+        .quote_price_tokens_for_exact_tokens(latest_block, coin1, coin2, amount, include_fee)
+        .map_err(|_| Error::Custom("api call error".to_string()))?
+        .ok_or(Error::Custom("invalid params or empty pool".to_string()))?
+    };
+
+    Ok(amount)
+  })?;
+
+  module.merge(serai_json_module)?;
   Ok(module)
 }

substrate/primitives/src/dex.rs

@@ -0,0 +1,19 @@
+#[cfg(feature = "borsh")]
+use borsh::{BorshSerialize, BorshDeserialize};
+#[cfg(feature = "serde")]
+use serde::{Serialize, Deserialize};
+
+use scale::{Encode, Decode, MaxEncodedLen};
+
+use crate::{Coin, SubstrateAmount};
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, MaxEncodedLen)]
+#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct QuotePriceParams {
+  pub coin1: Coin,
+  pub coin2: Coin,
+  pub amount: SubstrateAmount,
+  pub include_fee: bool,
+  pub exact_in: bool,
+}

substrate/primitives/src/lib.rs

@@ -40,6 +40,10 @@ pub use account::*;
 mod constants;
 pub use constants::*;
 
+mod dex;
+#[allow(unused_imports)]
+pub use dex::*;
+
 pub type BlockNumber = u64;
 pub type Header = sp_runtime::generic::Header<BlockNumber, sp_runtime::traits::BlakeTwo256>;
 

substrate/runtime/src/lib.rs

@@ -53,7 +53,7 @@ use sp_runtime::{
 
 #[allow(unused_imports)]
 use primitives::{
-  NetworkId, PublicKey, AccountLookup, SubstrateAmount, Coin, EXTERNAL_NETWORKS,
+  NetworkId, ExternalNetworkId, PublicKey, AccountLookup, SubstrateAmount, Coin, EXTERNAL_NETWORKS,
   MEDIAN_PRICE_WINDOW_LENGTH, HOURS, DAYS, MINUTES, TARGET_BLOCK_TIME, BLOCK_SIZE,
   FAST_EPOCH_DURATION,
 };
@@ -374,13 +374,6 @@ mod benches {
   );
 }
 
-sp_api::decl_runtime_apis! {
-  #[api_version(1)]
-  pub trait SeraiRuntimeApi {
-    fn validators(network_id: NetworkId) -> Vec<PublicKey>;
-  }
-}
-
 sp_api::impl_runtime_apis! {
   impl sp_api::Core<Block> for Runtime {
     fn version() -> RuntimeVersion {
@@ -589,7 +582,7 @@ sp_api::impl_runtime_apis! {
     }
   }
 
-  impl crate::SeraiRuntimeApi<Block> for Runtime {
+  impl validator_sets::ValidatorSetsApi<Block> for Runtime {
     fn validators(network_id: NetworkId) -> Vec<PublicKey> {
       if network_id == NetworkId::Serai {
         Babe::authorities()
@@ -604,6 +597,10 @@ sp_api::impl_runtime_apis! {
           )
       }
     }
+
+    fn external_network_key(network: ExternalNetworkId) -> Option<Vec<u8>> {
+      ValidatorSets::external_network_key(network)
+    }
   }
 
   impl dex::DexApi<Block> for Runtime {

substrate/validator-sets/pallet/Cargo.toml

@@ -26,6 +26,7 @@ serde = { version = "1", default-features = false, features = ["derive", "alloc"
 sp-core = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-io = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-std = { git = "https://github.com/serai-dex/substrate", default-features = false }
+sp-api = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-application-crypto = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-runtime = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-session = { git = "https://github.com/serai-dex/substrate", default-features = false }
@@ -65,6 +66,7 @@ std = [
   "sp-core/std",
   "sp-io/std",
   "sp-std/std",
+  "sp-api/std",
   "sp-application-crypto/std",
   "sp-runtime/std",
   "sp-session/std",

substrate/validator-sets/pallet/src/lib.rs

@@ -994,6 +994,14 @@ pub mod pallet {
         false
       }
     }
+
+    /// Returns the external network key for a given external network
+    pub fn external_network_key(network: ExternalNetworkId) -> Option<Vec<u8>> {
+      let current_session = Self::session(NetworkId::from(network))?;
+      let keys = Keys::<T>::get(ExternalValidatorSet { network, session: current_session })?;
+
+      Some(keys.1.into_inner())
+    }
   }
 
   #[pallet::call]
@@ -1365,4 +1373,17 @@ pub mod pallet {
   }
 }
 
+sp_api::decl_runtime_apis! {
+  #[api_version(1)]
+  pub trait ValidatorSetsApi {
+    /// Returns the validator set for a given network.
+    fn validators(network_id: NetworkId) -> Vec<PublicKey>;
+
+    /// Returns the external network key for a given external network.
+    fn external_network_key(
+      network: ExternalNetworkId,
+    ) -> Option<Vec<u8>>;
+  }
+}
+
 pub use pallet::*;