add specific network/coin/balance types (#619)

* add specific network/coin/balance types * misc fixes * fix clippy * misc fixes * fix pr comments * Make halting for external networks * fix encode/decode
2025-12-08 04:09:23 +00:00 · 2024-10-07 05:16:11 +03:00
parent d7ecab605e
commit 435f1d9ae1
91 changed files with 1536 additions and 1055 deletions
--- a/substrate/abi/src/dex.rs
+++ b/substrate/abi/src/dex.rs
@@ -2,7 +2,7 @@ use sp_runtime::BoundedVec;

 use serai_primitives::*;

-type PoolId = Coin;
+type PoolId = ExternalCoin;
 type MaxSwapPathLength = sp_core::ConstU32<3>;

 #[derive(Clone, PartialEq, Eq, Debug, scale::Encode, scale::Decode, scale_info::TypeInfo)]
@@ -10,7 +10,7 @@ type MaxSwapPathLength = sp_core::ConstU32<3>;
 #[cfg_attr(all(feature = "std", feature = "serde"), derive(serde::Deserialize))]
 pub enum Call {
  add_liquidity {
-    coin: Coin,
+    coin: ExternalCoin,
    coin_desired: SubstrateAmount,
    sri_desired: SubstrateAmount,
    coin_min: SubstrateAmount,
@@ -18,7 +18,7 @@ pub enum Call {
    mint_to: SeraiAddress,
  },
  remove_liquidity {
-    coin: Coin,
+    coin: ExternalCoin,
    lp_token_burn: SubstrateAmount,
    coin_min_receive: SubstrateAmount,
    sri_min_receive: SubstrateAmount,
--- a/substrate/abi/src/economic_security.rs
+++ b/substrate/abi/src/economic_security.rs
@@ -1,8 +1,8 @@
-use serai_primitives::NetworkId;
+use serai_primitives::ExternalNetworkId;

 #[derive(Clone, PartialEq, Eq, Debug, scale::Encode, scale::Decode, scale_info::TypeInfo)]
 #[cfg_attr(feature = "borsh", derive(borsh::BorshSerialize, borsh::BorshDeserialize))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum Event {
-  EconomicSecurityReached { network: NetworkId },
+  EconomicSecurityReached { network: ExternalNetworkId },
 }
--- a/substrate/abi/src/genesis_liquidity.rs
+++ b/substrate/abi/src/genesis_liquidity.rs
@@ -6,7 +6,7 @@ use primitives::*;
 #[derive(Clone, PartialEq, Eq, Debug, scale::Encode, scale::Decode, scale_info::TypeInfo)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum Call {
-  remove_coin_liquidity { balance: Balance },
+  remove_coin_liquidity { balance: ExternalBalance },
  oraclize_values { values: Values, signature: Signature },
 }

@@ -14,8 +14,7 @@ pub enum Call {
 #[cfg_attr(feature = "borsh", derive(borsh::BorshSerialize, borsh::BorshDeserialize))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum Event {
-  GenesisLiquidityAdded { by: SeraiAddress, balance: Balance },
-  GenesisLiquidityRemoved { by: SeraiAddress, balance: Balance },
-  GenesisLiquidityAddedToPool { coin1: Balance, coin2: Balance },
-  EconomicSecurityReached { network: NetworkId },
+  GenesisLiquidityAdded { by: SeraiAddress, balance: ExternalBalance },
+  GenesisLiquidityRemoved { by: SeraiAddress, balance: ExternalBalance },
+  GenesisLiquidityAddedToPool { coin: ExternalBalance, sri: Amount },
 }
--- a/substrate/abi/src/in_instructions.rs
+++ b/substrate/abi/src/in_instructions.rs
@@ -16,7 +16,7 @@ pub enum Call {
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
 #[cfg_attr(all(feature = "std", feature = "serde"), derive(serde::Deserialize))]
 pub enum Event {
-  Batch { network: NetworkId, id: u32, block: BlockHash, instructions_hash: [u8; 32] },
-  InstructionFailure { network: NetworkId, id: u32, index: u32 },
-  Halt { network: NetworkId },
+  Batch { network: ExternalNetworkId, id: u32, block: BlockHash, instructions_hash: [u8; 32] },
+  InstructionFailure { network: ExternalNetworkId, id: u32, index: u32 },
+  Halt { network: ExternalNetworkId },
 }
--- a/substrate/abi/src/validator_sets.rs
+++ b/substrate/abi/src/validator_sets.rs
@@ -10,13 +10,13 @@ use serai_validator_sets_primitives::*;
 #[cfg_attr(all(feature = "std", feature = "serde"), derive(serde::Deserialize))]
 pub enum Call {
  set_keys {
-    network: NetworkId,
+    network: ExternalNetworkId,
    removed_participants: BoundedVec<SeraiAddress, ConstU32<{ MAX_KEY_SHARES_PER_SET / 3 }>>,
    key_pair: KeyPair,
    signature: Signature,
  },
  report_slashes {
-    network: NetworkId,
+    network: ExternalNetworkId,
    slashes: BoundedVec<(SeraiAddress, u32), ConstU32<{ MAX_KEY_SHARES_PER_SET / 3 }>>,
    signature: Signature,
  },
@@ -47,7 +47,7 @@ pub enum Event {
    removed: SeraiAddress,
  },
  KeyGen {
-    set: ValidatorSet,
+    set: ExternalValidatorSet,
    key_pair: KeyPair,
  },
  AcceptedHandover {
--- a/substrate/client/src/serai/dex.rs
+++ b/substrate/client/src/serai/dex.rs
@@ -1,5 +1,5 @@
 use sp_core::bounded_vec::BoundedVec;
-use serai_abi::primitives::{SeraiAddress, Amount, Coin};
+use serai_abi::primitives::{Amount, Coin, ExternalCoin, SeraiAddress};

 use crate::{SeraiError, TemporalSerai};

@@ -20,7 +20,7 @@ impl<'a> SeraiDex<'a> {
  }

  pub fn add_liquidity(
-    coin: Coin,
+    coin: ExternalCoin,
    coin_amount: Amount,
    sri_amount: Amount,
    min_coin_amount: Amount,
@@ -61,11 +61,14 @@ impl<'a> SeraiDex<'a> {
  }

  /// Returns the reserves of `coin:SRI` pool.
-  pub async fn get_reserves(&self, coin: Coin) -> Result<Option<(Amount, Amount)>, SeraiError> {
-    self.0.runtime_api("DexApi_get_reserves", (coin, Coin::Serai)).await
+  pub async fn get_reserves(
+    &self,
+    coin: ExternalCoin,
+  ) -> Result<Option<(Amount, Amount)>, SeraiError> {
+    self.0.runtime_api("DexApi_get_reserves", (Coin::from(coin), Coin::Serai)).await
  }

-  pub async fn oracle_value(&self, coin: Coin) -> Result<Option<Amount>, SeraiError> {
+  pub async fn oracle_value(&self, coin: ExternalCoin) -> Result<Option<Amount>, SeraiError> {
    self.0.storage(PALLET, "SecurityOracleValue", coin).await
  }
 }
--- a/substrate/client/src/serai/genesis_liquidity.rs
+++ b/substrate/client/src/serai/genesis_liquidity.rs
@@ -35,7 +35,7 @@ impl<'a> SeraiGenesisLiquidity<'a> {
    ))
  }

-  pub fn remove_coin_liquidity(balance: Balance) -> serai_abi::Call {
+  pub fn remove_coin_liquidity(balance: ExternalBalance) -> serai_abi::Call {
    serai_abi::Call::GenesisLiquidity(serai_abi::genesis_liquidity::Call::remove_coin_liquidity {
      balance,
    })
@@ -44,7 +44,7 @@ impl<'a> SeraiGenesisLiquidity<'a> {
  pub async fn liquidity(
    &self,
    address: &SeraiAddress,
-    coin: Coin,
+    coin: ExternalCoin,
  ) -> Result<LiquidityAmount, SeraiError> {
    Ok(
      self
@@ -59,7 +59,7 @@ impl<'a> SeraiGenesisLiquidity<'a> {
    )
  }

-  pub async fn supply(&self, coin: Coin) -> Result<LiquidityAmount, SeraiError> {
+  pub async fn supply(&self, coin: ExternalCoin) -> Result<LiquidityAmount, SeraiError> {
    Ok(self.0.storage(PALLET, "Supply", coin).await?.unwrap_or(LiquidityAmount::zero()))
  }

--- a/substrate/client/src/serai/in_instructions.rs
+++ b/substrate/client/src/serai/in_instructions.rs
@@ -2,7 +2,7 @@ pub use serai_abi::in_instructions::primitives;
 use primitives::SignedBatch;

 use crate::{
-  primitives::{BlockHash, NetworkId},
+  primitives::{BlockHash, ExternalNetworkId},
  Transaction, SeraiError, Serai, TemporalSerai,
 };

@@ -15,14 +15,14 @@ pub struct SeraiInInstructions<'a>(pub(crate) &'a TemporalSerai<'a>);
 impl<'a> SeraiInInstructions<'a> {
  pub async fn latest_block_for_network(
    &self,
-    network: NetworkId,
+    network: ExternalNetworkId,
  ) -> Result<Option<BlockHash>, SeraiError> {
    self.0.storage(PALLET, "LatestNetworkBlock", network).await
  }

  pub async fn last_batch_for_network(
    &self,
-    network: NetworkId,
+    network: ExternalNetworkId,
  ) -> Result<Option<u32>, SeraiError> {
    self.0.storage(PALLET, "LastBatch", network).await
  }
--- a/substrate/client/src/serai/liquidity_tokens.rs
+++ b/substrate/client/src/serai/liquidity_tokens.rs
@@ -1,6 +1,6 @@
 use scale::Encode;

-use serai_abi::primitives::{SeraiAddress, Amount, Coin, Balance};
+use serai_abi::primitives::{Amount, ExternalBalance, ExternalCoin, SeraiAddress};

 use crate::{TemporalSerai, SeraiError};

@@ -9,13 +9,13 @@ const PALLET: &str = "LiquidityTokens";
 #[derive(Clone, Copy)]
 pub struct SeraiLiquidityTokens<'a>(pub(crate) &'a TemporalSerai<'a>);
 impl<'a> SeraiLiquidityTokens<'a> {
-  pub async fn token_supply(&self, coin: Coin) -> Result<Amount, SeraiError> {
+  pub async fn token_supply(&self, coin: ExternalCoin) -> Result<Amount, SeraiError> {
    Ok(self.0.storage(PALLET, "Supply", coin).await?.unwrap_or(Amount(0)))
  }

  pub async fn token_balance(
    &self,
-    coin: Coin,
+    coin: ExternalCoin,
    address: SeraiAddress,
  ) -> Result<Amount, SeraiError> {
    Ok(
@@ -31,11 +31,16 @@ impl<'a> SeraiLiquidityTokens<'a> {
    )
  }

-  pub fn transfer(to: SeraiAddress, balance: Balance) -> serai_abi::Call {
-    serai_abi::Call::LiquidityTokens(serai_abi::liquidity_tokens::Call::transfer { to, balance })
+  pub fn transfer(to: SeraiAddress, balance: ExternalBalance) -> serai_abi::Call {
+    serai_abi::Call::LiquidityTokens(serai_abi::liquidity_tokens::Call::transfer {
+      to,
+      balance: balance.into(),
+    })
  }

-  pub fn burn(balance: Balance) -> serai_abi::Call {
-    serai_abi::Call::LiquidityTokens(serai_abi::liquidity_tokens::Call::burn { balance })
+  pub fn burn(balance: ExternalBalance) -> serai_abi::Call {
+    serai_abi::Call::LiquidityTokens(serai_abi::liquidity_tokens::Call::burn {
+      balance: balance.into(),
+    })
  }
 }
--- a/substrate/client/src/serai/validator_sets.rs
+++ b/substrate/client/src/serai/validator_sets.rs
@@ -2,12 +2,12 @@ use scale::Encode;

 use sp_core::sr25519::{Public, Signature};

-use serai_abi::primitives::Amount;
+use serai_abi::{primitives::Amount, validator_sets::primitives::ExternalValidatorSet};
 pub use serai_abi::validator_sets::primitives;
-use primitives::{Session, ValidatorSet, KeyPair};
+use primitives::{Session, KeyPair};

 use crate::{
-  primitives::{NetworkId, SeraiAddress},
+  primitives::{NetworkId, ExternalNetworkId, SeraiAddress},
  Transaction, Serai, TemporalSerai, SeraiError,
 };

@@ -167,13 +167,13 @@ impl<'a> SeraiValidatorSets<'a> {
  }

  // TODO: Store these separately since we almost never need both at once?
-  pub async fn keys(&self, set: ValidatorSet) -> Result<Option<KeyPair>, SeraiError> {
+  pub async fn keys(&self, set: ExternalValidatorSet) -> Result<Option<KeyPair>, SeraiError> {
    self.0.storage(PALLET, "Keys", (sp_core::hashing::twox_64(&set.encode()), set)).await
  }

  pub async fn key_pending_slash_report(
    &self,
-    network: NetworkId,
+    network: ExternalNetworkId,
  ) -> Result<Option<Public>, SeraiError> {
    self.0.storage(PALLET, "PendingSlashReport", network).await
  }
@@ -187,7 +187,7 @@ impl<'a> SeraiValidatorSets<'a> {
  }

  pub fn set_keys(
-    network: NetworkId,
+    network: ExternalNetworkId,
    removed_participants: sp_runtime::BoundedVec<
      SeraiAddress,
      sp_core::ConstU32<{ primitives::MAX_KEY_SHARES_PER_SET / 3 }>,
@@ -212,7 +212,7 @@ impl<'a> SeraiValidatorSets<'a> {
  }

  pub fn report_slashes(
-    network: NetworkId,
+    network: ExternalNetworkId,
    slashes: sp_runtime::BoundedVec<
      (SeraiAddress, u32),
      sp_core::ConstU32<{ primitives::MAX_KEY_SHARES_PER_SET / 3 }>,
--- a/substrate/client/tests/batch.rs
+++ b/substrate/client/tests/batch.rs
@@ -8,7 +8,7 @@ use blake2::{
 use scale::Encode;

 use serai_client::{
-  primitives::{Amount, NetworkId, Coin, Balance, BlockHash, SeraiAddress},
+  primitives::{Amount, BlockHash, ExternalBalance, ExternalCoin, SeraiAddress},
  in_instructions::{
    primitives::{InInstruction, InInstructionWithBalance, Batch},
    InInstructionsEvent,
@@ -22,18 +22,17 @@ use common::in_instructions::provide_batch;

 serai_test!(
  publish_batch: (|serai: Serai| async move {
-    let network = NetworkId::Bitcoin;
    let id = 0;
-
    let mut block_hash = BlockHash([0; 32]);
    OsRng.fill_bytes(&mut block_hash.0);

    let mut address = SeraiAddress::new([0; 32]);
    OsRng.fill_bytes(&mut address.0);

-    let coin = Coin::Bitcoin;
+    let coin = ExternalCoin::Bitcoin;
+    let network = coin.network();
    let amount = Amount(OsRng.next_u64().saturating_add(1));
-    let balance = Balance { coin, amount };
+    let balance = ExternalBalance { coin, amount };

    let batch = Batch {
      network,
@@ -67,9 +66,9 @@ serai_test!(
    let serai = serai.coins();
    assert_eq!(
      serai.mint_events().await.unwrap(),
-      vec![CoinsEvent::Mint { to: address, balance }]
+      vec![CoinsEvent::Mint { to: address, balance: balance.into() }]
    );
-    assert_eq!(serai.coin_supply(coin).await.unwrap(), amount);
-    assert_eq!(serai.coin_balance(coin, address).await.unwrap(), amount);
+    assert_eq!(serai.coin_supply(coin.into()).await.unwrap(), amount);
+    assert_eq!(serai.coin_balance(coin.into(), address).await.unwrap(), amount);
  })
 );
--- a/substrate/client/tests/burn.rs
+++ b/substrate/client/tests/burn.rs
@@ -12,7 +12,7 @@ use sp_core::Pair;

 use serai_client::{
  primitives::{
-    Amount, NetworkId, Coin, Balance, BlockHash, SeraiAddress, Data, ExternalAddress,
+    Amount, ExternalCoin, ExternalBalance, BlockHash, SeraiAddress, Data, ExternalAddress,
    insecure_pair_from_name,
  },
  in_instructions::{
@@ -28,9 +28,7 @@ use common::{tx::publish_tx, in_instructions::provide_batch};

 serai_test!(
  burn: (|serai: Serai| async move {
-    let network = NetworkId::Bitcoin;
    let id = 0;
-
    let mut block_hash = BlockHash([0; 32]);
    OsRng.fill_bytes(&mut block_hash.0);

@@ -38,9 +36,10 @@ serai_test!(
    let public = pair.public();
    let address = SeraiAddress::from(public);

-    let coin = Coin::Bitcoin;
+    let coin = ExternalCoin::Bitcoin;
+    let network = coin.network();
    let amount = Amount(OsRng.next_u64().saturating_add(1));
-    let balance = Balance { coin, amount };
+    let balance = ExternalBalance { coin, amount };

    let batch = Batch {
      network,
@@ -69,10 +68,10 @@ serai_test!(

    assert_eq!(
      serai.coins().mint_events().await.unwrap(),
-      vec![CoinsEvent::Mint { to: address, balance }]
+      vec![CoinsEvent::Mint { to: address, balance: balance.into() }]
    );
-    assert_eq!(serai.coins().coin_supply(coin).await.unwrap(), amount);
-    assert_eq!(serai.coins().coin_balance(coin, address).await.unwrap(), amount);
+    assert_eq!(serai.coins().coin_supply(coin.into()).await.unwrap(), amount);
+    assert_eq!(serai.coins().coin_balance(coin.into(), address).await.unwrap(), amount);

    // Now burn it
    let mut rand_bytes = vec![0; 32];
@@ -99,7 +98,7 @@ serai_test!(
    let serai = serai.coins();
    let events = serai.burn_with_instruction_events().await.unwrap();
    assert_eq!(events, vec![CoinsEvent::BurnWithInstruction { from: address, instruction }]);
-    assert_eq!(serai.coin_supply(coin).await.unwrap(), Amount(0));
-    assert_eq!(serai.coin_balance(coin, address).await.unwrap(), Amount(0));
+    assert_eq!(serai.coin_supply(coin.into()).await.unwrap(), Amount(0));
+    assert_eq!(serai.coin_balance(coin.into(), address).await.unwrap(), Amount(0));
  })
 );
--- a/substrate/client/tests/common/dex.rs
+++ b/substrate/client/tests/common/dex.rs
@@ -1,4 +1,4 @@
-use serai_abi::primitives::{Coin, Amount};
+use serai_abi::primitives::{Amount, Coin, ExternalCoin};

 use serai_client::{Serai, SeraiDex};
 use sp_core::{sr25519::Pair, Pair as PairTrait};
@@ -8,7 +8,7 @@ use crate::common::tx::publish_tx;
 #[allow(dead_code)]
 pub async fn add_liquidity(
  serai: &Serai,
-  coin: Coin,
+  coin: ExternalCoin,
  coin_amount: Amount,
  sri_amount: Amount,
  nonce: u32,
--- a/substrate/client/tests/common/genesis_liquidity.rs
+++ b/substrate/client/tests/common/genesis_liquidity.rs
@@ -11,11 +11,12 @@ use sp_core::{sr25519::Signature, Pair as PairTrait};

 use serai_abi::{
  genesis_liquidity::primitives::{oraclize_values_message, Values},
-  validator_sets::primitives::{musig_context, Session, ValidatorSet},
-  in_instructions::primitives::{InInstruction, InInstructionWithBalance, Batch},
+  in_instructions::primitives::{Batch, InInstruction, InInstructionWithBalance},
  primitives::{
-    Amount, NetworkId, Coin, Balance, BlockHash, SeraiAddress, insecure_pair_from_name,
+    insecure_pair_from_name, Amount, ExternalBalance, BlockHash, ExternalCoin, ExternalNetworkId,
+    NetworkId, SeraiAddress, EXTERNAL_COINS,
  },
+  validator_sets::primitives::{musig_context, Session, ValidatorSet},
 };

 use serai_client::{Serai, SeraiGenesisLiquidity};
@@ -25,12 +26,11 @@ use crate::common::{in_instructions::provide_batch, tx::publish_tx};
 #[allow(dead_code)]
 pub async fn set_up_genesis(
  serai: &Serai,
-  coins: &[Coin],
-  values: &HashMap<Coin, u64>,
-) -> (HashMap<Coin, Vec<(SeraiAddress, Amount)>>, HashMap<NetworkId, u32>) {
+  values: &HashMap<ExternalCoin, u64>,
+) -> (HashMap<ExternalCoin, Vec<(SeraiAddress, Amount)>>, HashMap<ExternalNetworkId, u32>) {
  // make accounts with amounts
  let mut accounts = HashMap::new();
-  for coin in coins {
+  for coin in EXTERNAL_COINS {
    // make 5 accounts per coin
    let mut values = vec![];
    for _ in 0 .. 5 {
@@ -38,18 +38,18 @@ pub async fn set_up_genesis(
      OsRng.fill_bytes(&mut address.0);
      values.push((address, Amount(OsRng.next_u64() % 10u64.pow(coin.decimals()))));
    }
-    accounts.insert(*coin, values);
+    accounts.insert(coin, values);
  }

  // send a batch per coin
-  let mut batch_ids: HashMap<NetworkId, u32> = HashMap::new();
-  for coin in coins {
+  let mut batch_ids: HashMap<ExternalNetworkId, u32> = HashMap::new();
+  for coin in EXTERNAL_COINS {
    // set up instructions
-    let instructions = accounts[coin]
+    let instructions = accounts[&coin]
      .iter()
      .map(|(addr, amount)| InInstructionWithBalance {
        instruction: InInstruction::GenesisLiquidity(*addr),
-        balance: Balance { coin: *coin, amount: *amount },
+        balance: ExternalBalance { coin, amount: *amount },
      })
      .collect::<Vec<_>>();

@@ -73,8 +73,11 @@ pub async fn set_up_genesis(
  // set values relative to each other. We can do that without checking for genesis period blocks
  // since we are running in test(fast-epoch) mode.
  // TODO: Random values here
-  let values =
-    Values { monero: values[&Coin::Monero], ether: values[&Coin::Ether], dai: values[&Coin::Dai] };
+  let values = Values {
+    monero: values[&ExternalCoin::Monero],
+    ether: values[&ExternalCoin::Ether],
+    dai: values[&ExternalCoin::Dai],
+  };
  set_values(serai, &values).await;

  (accounts, batch_ids)
--- a/substrate/client/tests/common/in_instructions.rs
+++ b/substrate/client/tests/common/in_instructions.rs
@@ -9,8 +9,8 @@ use scale::Encode;
 use sp_core::Pair;

 use serai_client::{
-  primitives::{insecure_pair_from_name, BlockHash, NetworkId, Balance, SeraiAddress},
-  validator_sets::primitives::{ValidatorSet, KeyPair},
+  primitives::{insecure_pair_from_name, BlockHash, ExternalBalance, SeraiAddress},
+  validator_sets::primitives::{ExternalValidatorSet, KeyPair},
  in_instructions::{
    primitives::{Batch, SignedBatch, batch_message, InInstruction, InInstructionWithBalance},
    InInstructionsEvent,
@@ -23,8 +23,8 @@ use crate::common::{tx::publish_tx, validator_sets::set_keys};
 #[allow(dead_code)]
 pub async fn provide_batch(serai: &Serai, batch: Batch) -> [u8; 32] {
  let serai_latest = serai.as_of_latest_finalized_block().await.unwrap();
-  let session = serai_latest.validator_sets().session(batch.network).await.unwrap().unwrap();
-  let set = ValidatorSet { session, network: batch.network };
+  let session = serai_latest.validator_sets().session(batch.network.into()).await.unwrap().unwrap();
+  let set = ExternalValidatorSet { session, network: batch.network };

  let pair = insecure_pair_from_name(&format!("ValidatorSet {set:?}"));
  let keys = if let Some(keys) = serai_latest.validator_sets().keys(set).await.unwrap() {
@@ -65,8 +65,7 @@ pub async fn provide_batch(serai: &Serai, batch: Batch) -> [u8; 32] {
 #[allow(dead_code)]
 pub async fn mint_coin(
  serai: &Serai,
-  balance: Balance,
-  network: NetworkId,
+  balance: ExternalBalance,
  batch_id: u32,
  address: SeraiAddress,
 ) -> [u8; 32] {
@@ -74,7 +73,7 @@ pub async fn mint_coin(
  OsRng.fill_bytes(&mut block_hash.0);

  let batch = Batch {
-    network,
+    network: balance.coin.network(),
    id: batch_id,
    block: block_hash,
    instructions: vec![InInstructionWithBalance {
--- a/substrate/client/tests/common/validator_sets.rs
+++ b/substrate/client/tests/common/validator_sets.rs
@@ -15,7 +15,7 @@ use schnorrkel::Schnorrkel;

 use serai_client::{
  validator_sets::{
-    primitives::{ValidatorSet, KeyPair, musig_context, set_keys_message},
+    primitives::{ExternalValidatorSet, KeyPair, musig_context, set_keys_message},
    ValidatorSetsEvent,
  },
  Amount, Serai, SeraiValidatorSets,
@@ -26,7 +26,7 @@ use crate::common::tx::publish_tx;
 #[allow(dead_code)]
 pub async fn set_keys(
  serai: &Serai,
-  set: ValidatorSet,
+  set: ExternalValidatorSet,
  key_pair: KeyPair,
  pairs: &[Pair],
 ) -> [u8; 32] {
@@ -46,7 +46,8 @@ pub async fn set_keys(
    assert_eq!(Ristretto::generator() * secret_key, pub_keys[i]);

    threshold_keys.push(
-      musig::<Ristretto>(&musig_context(set), &Zeroizing::new(secret_key), &pub_keys).unwrap(),
+      musig::<Ristretto>(&musig_context(set.into()), &Zeroizing::new(secret_key), &pub_keys)
+        .unwrap(),
    );
  }

--- a/substrate/client/tests/dex.rs
+++ b/substrate/client/tests/dex.rs
@@ -6,8 +6,8 @@ use serai_abi::in_instructions::primitives::DexCall;

 use serai_client::{
  primitives::{
-    Amount, NetworkId, Coin, Balance, BlockHash, insecure_pair_from_name, ExternalAddress,
-    SeraiAddress,
+    Amount, Coin, Balance, BlockHash, insecure_pair_from_name, ExternalAddress, SeraiAddress,
+    ExternalCoin, ExternalBalance,
  },
  in_instructions::primitives::{
    InInstruction, InInstructionWithBalance, Batch, IN_INSTRUCTION_EXECUTOR, OutAddress,
@@ -28,15 +28,14 @@ use common::{
 // TODO: Check Transfer events
 serai_test!(
  add_liquidity: (|serai: Serai| async move {
-    let coin = Coin::Monero;
+    let coin = ExternalCoin::Monero;
    let pair = insecure_pair_from_name("Ferdie");

    // mint sriXMR in the account so that we can add liq.
    // Ferdie account is already pre-funded with SRI.
    mint_coin(
      &serai,
-      Balance { coin, amount: Amount(100_000_000_000_000) },
-      NetworkId::Monero,
+      ExternalBalance { coin, amount: Amount(100_000_000_000_000) },
      0,
      pair.clone().public().into(),
    )
@@ -61,7 +60,7 @@ serai_test!(
      vec![DexEvent::LiquidityAdded {
        who: pair.public().into(),
        mint_to: pair.public().into(),
-        pool_id: Coin::Monero,
+        pool_id: coin,
        coin_amount: coin_amount.0,
        sri_amount: sri_amount.0,
        lp_token_minted: 49_999999990000
@@ -71,15 +70,14 @@ serai_test!(

  // Tests coin -> SRI and SRI -> coin swaps.
  swap_coin_to_sri: (|serai: Serai| async move {
-    let coin = Coin::Ether;
+    let coin = ExternalCoin::Ether;
    let pair = insecure_pair_from_name("Ferdie");

    // mint sriXMR in the account so that we can add liq.
    // Ferdie account is already pre-funded with SRI.
    mint_coin(
      &serai,
-      Balance { coin, amount: Amount(100_000_000_000_000) },
-      NetworkId::Ethereum,
+      ExternalBalance { coin, amount: Amount(100_000_000_000_000) },
      0,
      pair.clone().public().into(),
    )
@@ -96,14 +94,21 @@ serai_test!(

    // now that we have our liquid pool, swap some coin to SRI.
    let mut amount_in = Amount(25_000_000_000_000);
-    let mut block = common_swap(&serai, coin, Coin::Serai, amount_in, Amount(1), 1, pair.clone())
+    let mut block = common_swap(
+      &serai,
+      coin.into(),
+      Coin::Serai,
+      amount_in,
+      Amount(1),
+      1,
+      pair.clone())
      .await;

    // get only the swap events
    let mut events = serai.as_of(block).dex().events().await.unwrap();
    events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-    let mut path = BoundedVec::try_from(vec![coin, Coin::Serai]).unwrap();
+    let mut path = BoundedVec::try_from(vec![coin.into(), Coin::Serai]).unwrap();
    assert_eq!(
      events,
      vec![DexEvent::SwapExecuted {
@@ -117,13 +122,21 @@ serai_test!(

    // now swap some SRI to coin
    amount_in = Amount(10_000_000_000_000);
-    block = common_swap(&serai, Coin::Serai, coin, amount_in, Amount(1), 2, pair.clone()).await;
+    block = common_swap(
+      &serai,
+      Coin::Serai,
+      coin.into(),
+      amount_in,
+      Amount(1),
+      2,
+      pair.clone()
+    ).await;

    // get only the swap events
    let mut events = serai.as_of(block).dex().events().await.unwrap();
    events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-    path = BoundedVec::try_from(vec![Coin::Serai, coin]).unwrap();
+    path = BoundedVec::try_from(vec![Coin::Serai, coin.into()]).unwrap();
    assert_eq!(
      events,
      vec![DexEvent::SwapExecuted {
@@ -137,23 +150,21 @@ serai_test!(
  })

  swap_coin_to_coin: (|serai: Serai| async move {
-    let coin1 = Coin::Monero;
-    let coin2 = Coin::Dai;
+    let coin1 = ExternalCoin::Monero;
+    let coin2 = ExternalCoin::Dai;
    let pair = insecure_pair_from_name("Ferdie");

    // mint coins
    mint_coin(
      &serai,
-      Balance { coin: coin1, amount: Amount(100_000_000_000_000) },
-      NetworkId::Monero,
+      ExternalBalance { coin: coin1, amount: Amount(100_000_000_000_000) },
      0,
      pair.clone().public().into(),
    )
    .await;
    mint_coin(
      &serai,
-      Balance { coin: coin2, amount: Amount(100_000_000_000_000) },
-      NetworkId::Ethereum,
+      ExternalBalance { coin: coin2, amount: Amount(100_000_000_000_000) },
      0,
      pair.clone().public().into(),
    )
@@ -177,13 +188,21 @@ serai_test!(

    // swap coin1 -> coin2
    let amount_in = Amount(25_000_000_000_000);
-    let block = common_swap(&serai, coin1, coin2, amount_in, Amount(1), 2, pair.clone()).await;
+    let block = common_swap(
+      &serai,
+      coin1.into(),
+      coin2.into(),
+      amount_in,
+      Amount(1),
+      2,
+      pair.clone()
+    ).await;

    // get only the swap events
    let mut events = serai.as_of(block).dex().events().await.unwrap();
    events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-    let path = BoundedVec::try_from(vec![coin1, Coin::Serai, coin2]).unwrap();
+    let path = BoundedVec::try_from(vec![coin1.into(), Coin::Serai, coin2.into()]).unwrap();
    assert_eq!(
      events,
      vec![DexEvent::SwapExecuted {
@@ -197,7 +216,7 @@ serai_test!(
  })

  add_liquidity_in_instructions: (|serai: Serai| async move {
-    let coin = Coin::Bitcoin;
+    let coin = ExternalCoin::Bitcoin;
    let pair = insecure_pair_from_name("Ferdie");
    let mut batch_id = 0;

@@ -205,8 +224,7 @@ serai_test!(
    // Ferdie account is already pre-funded with SRI.
    mint_coin(
      &serai,
-      Balance { coin, amount: Amount(100_000_000_000_000) },
-      NetworkId::Bitcoin,
+      ExternalBalance { coin, amount: Amount(100_000_000_000_000) },
      batch_id,
      pair.clone().public().into(),
    )
@@ -227,12 +245,12 @@ serai_test!(
    let mut block_hash = BlockHash([0; 32]);
    OsRng.fill_bytes(&mut block_hash.0);
    let batch = Batch {
-      network: NetworkId::Bitcoin,
+      network: coin.network(),
      id: batch_id,
      block: block_hash,
      instructions: vec![InInstructionWithBalance {
        instruction: InInstruction::Dex(DexCall::SwapAndAddLiquidity(pair.public().into())),
-        balance: Balance { coin: Coin::Bitcoin, amount: Amount(20_000_000_000_000) },
+        balance: ExternalBalance { coin, amount: Amount(20_000_000_000_000) },
      }],
    };

@@ -244,7 +262,7 @@ serai_test!(
      vec![DexEvent::LiquidityAdded {
        who: IN_INSTRUCTION_EXECUTOR,
        mint_to: pair.public().into(),
-        pool_id: Coin::Bitcoin,
+        pool_id: coin,
        coin_amount: 10_000_000_000_000, // half of sent amount
        sri_amount: 111_333_778_668,
        lp_token_minted: 1_054_092_553_383
@@ -253,8 +271,8 @@ serai_test!(
  })

  swap_in_instructions: (|serai: Serai| async move {
-    let coin1 = Coin::Monero;
-    let coin2 = Coin::Ether;
+    let coin1 = ExternalCoin::Monero;
+    let coin2 = ExternalCoin::Ether;
    let pair = insecure_pair_from_name("Ferdie");
    let mut coin1_batch_id = 0;
    let mut coin2_batch_id = 0;
@@ -262,8 +280,7 @@ serai_test!(
    // mint coins
    mint_coin(
      &serai,
-      Balance { coin: coin1, amount: Amount(10_000_000_000_000_000) },
-      NetworkId::Monero,
+      ExternalBalance { coin: coin1, amount: Amount(10_000_000_000_000_000) },
      coin1_batch_id,
      pair.clone().public().into(),
    )
@@ -271,8 +288,7 @@ serai_test!(
    coin1_batch_id += 1;
    mint_coin(
      &serai,
-      Balance { coin: coin2, amount: Amount(100_000_000_000_000) },
-      NetworkId::Ethereum,
+      ExternalBalance { coin: coin2, amount: Amount(100_000_000_000_000) },
      coin2_batch_id,
      pair.clone().public().into(),
    )
@@ -305,18 +321,18 @@ serai_test!(
      let out_address = OutAddress::External(ExternalAddress::new(rand_bytes.clone()).unwrap());

      // amount is the min out amount
-      let out_balance = Balance { coin: coin2, amount: Amount(1) };
+      let out_balance = Balance { coin: coin2.into(), amount: Amount(1) };

      // now that we have our pools, we can try to swap
      let mut block_hash = BlockHash([0; 32]);
      OsRng.fill_bytes(&mut block_hash.0);
      let batch = Batch {
-        network: NetworkId::Monero,
+        network: coin1.network(),
        id: coin1_batch_id,
        block: block_hash,
        instructions: vec![InInstructionWithBalance {
          instruction: InInstruction::Dex(DexCall::Swap(out_balance, out_address)),
-          balance: Balance { coin: coin1, amount: Amount(200_000_000_000_000) },
+          balance: ExternalBalance { coin: coin1, amount: Amount(200_000_000_000_000) },
        }],
      };

@@ -325,7 +341,7 @@ serai_test!(
      let mut events = serai.as_of(block).dex().events().await.unwrap();
      events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-      let path = BoundedVec::try_from(vec![coin1, Coin::Serai, coin2]).unwrap();
+      let path = BoundedVec::try_from(vec![coin1.into(), Coin::Serai, coin2.into()]).unwrap();
      assert_eq!(
        events,
        vec![DexEvent::SwapExecuted {
@@ -345,18 +361,18 @@ serai_test!(
        OutAddress::Serai(SeraiAddress::new(rand_bytes.clone().try_into().unwrap()));

      // amount is the min out amount
-      let out_balance = Balance { coin: coin1, amount: Amount(1) };
+      let out_balance = Balance { coin: coin1.into(), amount: Amount(1) };

      // now that we have our pools, we can try to swap
      let mut block_hash = BlockHash([0; 32]);
      OsRng.fill_bytes(&mut block_hash.0);
      let batch = Batch {
-        network: NetworkId::Ethereum,
+        network: coin2.network(),
        id: coin2_batch_id,
        block: block_hash,
        instructions: vec![InInstructionWithBalance {
          instruction: InInstruction::Dex(DexCall::Swap(out_balance, out_address.clone())),
-          balance: Balance { coin: coin2, amount: Amount(200_000_000_000) },
+          balance: ExternalBalance { coin: coin2, amount: Amount(200_000_000_000) },
        }],
      };

@@ -364,7 +380,7 @@ serai_test!(
      let mut events = serai.as_of(block).dex().events().await.unwrap();
      events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-      let path = BoundedVec::try_from(vec![coin2, Coin::Serai, coin1]).unwrap();
+      let path = BoundedVec::try_from(vec![coin2.into(), Coin::Serai, coin1.into()]).unwrap();
      assert_eq!(
        events,
        vec![DexEvent::SwapExecuted {
@@ -389,12 +405,12 @@ serai_test!(
      let mut block_hash = BlockHash([0; 32]);
      OsRng.fill_bytes(&mut block_hash.0);
      let batch = Batch {
-        network: NetworkId::Monero,
+        network: coin1.network(),
        id: coin1_batch_id,
        block: block_hash,
        instructions: vec![InInstructionWithBalance {
          instruction: InInstruction::Dex(DexCall::Swap(out_balance, out_address.clone())),
-          balance: Balance { coin: coin1, amount: Amount(100_000_000_000_000) },
+          balance: ExternalBalance { coin: coin1, amount: Amount(100_000_000_000_000) },
        }],
      };

@@ -402,7 +418,7 @@ serai_test!(
      let mut events = serai.as_of(block).dex().events().await.unwrap();
      events.retain(|e| matches!(e, DexEvent::SwapExecuted { .. }));

-      let path = BoundedVec::try_from(vec![coin1, Coin::Serai]).unwrap();
+      let path = BoundedVec::try_from(vec![coin1.into(), Coin::Serai]).unwrap();
      assert_eq!(
        events,
        vec![DexEvent::SwapExecuted {
--- a/substrate/client/tests/dht.rs
+++ b/substrate/client/tests/dht.rs
@@ -1,4 +1,4 @@
-use serai_client::{primitives::NetworkId, Serai};
+use serai_client::{primitives::ExternalNetworkId, Serai};

 #[tokio::test]
 async fn dht() {
@@ -44,7 +44,7 @@ async fn dht() {
      assert!(!Serai::new(serai_rpc.clone())
        .await
        .unwrap()
-        .p2p_validators(NetworkId::Bitcoin)
+        .p2p_validators(ExternalNetworkId::Bitcoin.into())
        .await
        .unwrap()
        .is_empty());
--- a/substrate/client/tests/emissions.rs
+++ b/substrate/client/tests/emissions.rs
@@ -7,16 +7,13 @@ use serai_abi::{
  emissions::primitives::{INITIAL_REWARD_PER_BLOCK, SECURE_BY},
  in_instructions::primitives::Batch,
  primitives::{
-    BlockHash, Coin, COINS, FAST_EPOCH_DURATION, FAST_EPOCH_INITIAL_PERIOD, NETWORKS,
-    TARGET_BLOCK_TIME,
+    BlockHash, ExternalBalance, ExternalCoin, ExternalNetworkId, EXTERNAL_NETWORKS,
+    FAST_EPOCH_DURATION, FAST_EPOCH_INITIAL_PERIOD, NETWORKS, TARGET_BLOCK_TIME, Amount, NetworkId,
  },
  validator_sets::primitives::Session,
 };

-use serai_client::{
-  primitives::{Amount, NetworkId, Balance},
-  Serai,
-};
+use serai_client::Serai;

 mod common;
 use common::{genesis_liquidity::set_up_genesis, in_instructions::provide_batch};
@@ -27,31 +24,32 @@ serai_test_fast_epoch!(
  })
 );

-async fn send_batches(serai: &Serai, ids: &mut HashMap<NetworkId, u32>) {
-  for network in NETWORKS {
-    if network != NetworkId::Serai {
-      // set up batch id
-      ids
-        .entry(network)
-        .and_modify(|v| {
-          *v += 1;
-        })
-        .or_insert(0);
+async fn send_batches(serai: &Serai, ids: &mut HashMap<ExternalNetworkId, u32>) {
+  for network in EXTERNAL_NETWORKS {
+    // set up batch id
+    ids
+      .entry(network)
+      .and_modify(|v| {
+        *v += 1;
+      })
+      .or_insert(0);

-      // set up block hash
-      let mut block = BlockHash([0; 32]);
-      OsRng.fill_bytes(&mut block.0);
+    // set up block hash
+    let mut block = BlockHash([0; 32]);
+    OsRng.fill_bytes(&mut block.0);

-      provide_batch(serai, Batch { network, id: ids[&network], block, instructions: vec![] }).await;
-    }
+    provide_batch(serai, Batch { network, id: ids[&network], block, instructions: vec![] }).await;
  }
 }

 async fn test_emissions(serai: Serai) {
  // set up the genesis
-  let coins = COINS.into_iter().filter(|c| *c != Coin::native()).collect::<Vec<_>>();
-  let values = HashMap::from([(Coin::Monero, 184100), (Coin::Ether, 4785000), (Coin::Dai, 1500)]);
-  let (_, mut batch_ids) = set_up_genesis(&serai, &coins, &values).await;
+  let values = HashMap::from([
+    (ExternalCoin::Monero, 184100),
+    (ExternalCoin::Ether, 4785000),
+    (ExternalCoin::Dai, 1500),
+  ]);
+  let (_, mut batch_ids) = set_up_genesis(&serai, &values).await;

  // wait until genesis is complete
  let mut genesis_complete_block = None;
@@ -144,7 +142,7 @@ async fn test_emissions(serai: Serai) {
 }

 /// Returns the required stake in terms SRI for a given `Balance`.
-async fn required_stake(serai: &TemporalSerai<'_>, balance: Balance) -> u64 {
+async fn required_stake(serai: &TemporalSerai<'_>, balance: ExternalBalance) -> u64 {
  // This is inclusive to an increase in accuracy
  let sri_per_coin = serai.dex().oracle_value(balance.coin).await.unwrap().unwrap_or(Amount(0));

@@ -208,18 +206,14 @@ async fn get_distances(
  // we can check the supply to see how much coin hence liability we have.
  let mut distances: HashMap<NetworkId, u64> = HashMap::new();
  let mut total_distance = 0;
-  for n in NETWORKS {
-    if n == NetworkId::Serai {
-      continue;
-    }
-
+  for n in EXTERNAL_NETWORKS {
    let mut required = 0;
    for c in n.coins() {
-      let amount = serai.coins().coin_supply(*c).await.unwrap();
-      required += required_stake(serai, Balance { coin: *c, amount }).await;
+      let amount = serai.coins().coin_supply(c.into()).await.unwrap();
+      required += required_stake(serai, ExternalBalance { coin: c, amount }).await;
    }

-    let mut current = *current_stake.get(&n).unwrap();
+    let mut current = *current_stake.get(&n.into()).unwrap();
    if current > required {
      current = required;
    }
@@ -227,7 +221,7 @@ async fn get_distances(
    let distance = required - current;
    total_distance += distance;

-    distances.insert(n, distance);
+    distances.insert(n.into(), distance);
  }

  // add serai network portion(20%)
--- a/substrate/client/tests/genesis_liquidity.rs
+++ b/substrate/client/tests/genesis_liquidity.rs
@@ -2,7 +2,7 @@ use std::{time::Duration, collections::HashMap};

 use serai_client::Serai;

-use serai_abi::primitives::{Coin, COINS, Amount, GENESIS_SRI};
+use serai_abi::primitives::{Amount, Coin, ExternalCoin, COINS, EXTERNAL_COINS, GENESIS_SRI};

 use serai_client::genesis_liquidity::primitives::{
  GENESIS_LIQUIDITY_ACCOUNT, INITIAL_GENESIS_LP_SHARES,
@@ -19,9 +19,12 @@ serai_test_fast_epoch!(

 pub async fn test_genesis_liquidity(serai: Serai) {
  // set up the genesis
-  let coins = COINS.into_iter().filter(|c| *c != Coin::native()).collect::<Vec<_>>();
-  let values = HashMap::from([(Coin::Monero, 184100), (Coin::Ether, 4785000), (Coin::Dai, 1500)]);
-  let (accounts, _) = set_up_genesis(&serai, &coins, &values).await;
+  let values = HashMap::from([
+    (ExternalCoin::Monero, 184100),
+    (ExternalCoin::Ether, 4785000),
+    (ExternalCoin::Dai, 1500),
+  ]);
+  let (accounts, _) = set_up_genesis(&serai, &values).await;

  // wait until genesis is complete
  while serai
@@ -55,9 +58,9 @@ pub async fn test_genesis_liquidity(serai: Serai) {
  // check pools has proper liquidity
  let mut pool_amounts = HashMap::new();
  let mut total_value = 0u128;
-  for coin in coins.clone() {
+  for coin in EXTERNAL_COINS {
    let total_coin = accounts[&coin].iter().fold(0u128, |acc, value| acc + u128::from(value.1 .0));
-    let value = if coin != Coin::Bitcoin {
+    let value = if coin != ExternalCoin::Bitcoin {
      (total_coin * u128::from(values[&coin])) / 10u128.pow(coin.decimals())
    } else {
      total_coin
@@ -69,8 +72,8 @@ pub async fn test_genesis_liquidity(serai: Serai) {

  // check distributed SRI per pool
  let mut total_sri_distributed = 0u128;
-  for coin in coins.clone() {
-    let sri = if coin == *COINS.last().unwrap() {
+  for coin in EXTERNAL_COINS {
+    let sri = if coin == *EXTERNAL_COINS.last().unwrap() {
      u128::from(GENESIS_SRI).checked_sub(total_sri_distributed).unwrap()
    } else {
      (pool_amounts[&coin].1 * u128::from(GENESIS_SRI)) / total_value
@@ -83,7 +86,7 @@ pub async fn test_genesis_liquidity(serai: Serai) {
  }

  // check each liquidity provider got liquidity tokens proportional to their value
-  for coin in coins {
+  for coin in EXTERNAL_COINS {
    let liq_supply = serai.genesis_liquidity().supply(coin).await.unwrap();
    for (acc, amount) in &accounts[&coin] {
      let acc_liq_shares = serai.genesis_liquidity().liquidity(acc, coin).await.unwrap().shares;
--- a/substrate/client/tests/validator_sets.rs
+++ b/substrate/client/tests/validator_sets.rs
@@ -7,17 +7,18 @@ use sp_core::{

 use serai_client::{
  primitives::{
-    NETWORKS, NetworkId, BlockHash, insecure_pair_from_name, FAST_EPOCH_DURATION, TARGET_BLOCK_TIME,
+    NETWORKS, NetworkId, BlockHash, insecure_pair_from_name, FAST_EPOCH_DURATION,
+    TARGET_BLOCK_TIME, ExternalNetworkId, Amount,
  },
  validator_sets::{
-    primitives::{Session, ValidatorSet, KeyPair},
+    primitives::{Session, ValidatorSet, ExternalValidatorSet, KeyPair},
    ValidatorSetsEvent,
  },
  in_instructions::{
    primitives::{Batch, SignedBatch, batch_message},
    SeraiInInstructions,
  },
-  Amount, Serai,
+  Serai,
 };

 mod common;
@@ -58,8 +59,8 @@ async fn get_ordered_keys(serai: &Serai, network: NetworkId, accounts: &[Pair])

 serai_test!(
  set_keys_test: (|serai: Serai| async move {
-    let network = NetworkId::Bitcoin;
-    let set = ValidatorSet { session: Session(0), network };
+    let network = ExternalNetworkId::Bitcoin;
+    let set = ExternalValidatorSet { session: Session(0), network };

    let pair = insecure_pair_from_name("Alice");
    let public = pair.public();
@@ -89,7 +90,7 @@ serai_test!(
    {
      let vs_serai = serai.as_of_latest_finalized_block().await.unwrap();
      let vs_serai = vs_serai.validator_sets();
-      let participants = vs_serai.participants(set.network).await
+      let participants = vs_serai.participants(set.network.into()).await
        .unwrap()
        .unwrap()
        .into_iter()
@@ -197,9 +198,9 @@ async fn validator_set_rotation() {
      // amounts for single key share per network
      let key_shares = HashMap::from([
        (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
-        (NetworkId::Bitcoin, Amount(1_000_000 * 10_u64.pow(8))),
-        (NetworkId::Monero, Amount(100_000 * 10_u64.pow(8))),
-        (NetworkId::Ethereum, Amount(1_000_000 * 10_u64.pow(8))),
+        (NetworkId::External(ExternalNetworkId::Bitcoin), Amount(1_000_000 * 10_u64.pow(8))),
+        (NetworkId::External(ExternalNetworkId::Monero), Amount(100_000 * 10_u64.pow(8))),
+        (NetworkId::External(ExternalNetworkId::Ethereum), Amount(1_000_000 * 10_u64.pow(8))),
      ]);

      // genesis participants per network
@@ -208,9 +209,9 @@ async fn validator_set_rotation() {
        accounts[.. 4].to_vec().iter().map(|pair| pair.public()).collect::<Vec<_>>();
      let mut participants = HashMap::from([
        (NetworkId::Serai, default_participants.clone()),
-        (NetworkId::Bitcoin, default_participants.clone()),
-        (NetworkId::Monero, default_participants.clone()),
-        (NetworkId::Ethereum, default_participants),
+        (NetworkId::External(ExternalNetworkId::Bitcoin), default_participants.clone()),
+        (NetworkId::External(ExternalNetworkId::Monero), default_participants.clone()),
+        (NetworkId::External(ExternalNetworkId::Ethereum), default_participants),
      ]);

      // test the set rotation
@@ -237,7 +238,8 @@ async fn validator_set_rotation() {

        // set the keys if it is an external set
        if network != NetworkId::Serai {
-          let set = ValidatorSet { session: Session(0), network };
+          let set =
+            ExternalValidatorSet { session: Session(0), network: network.try_into().unwrap() };
          let key_pair = get_random_key_pair();
          let pairs = get_ordered_keys(&serai, network, &accounts).await;
          set_keys(&serai, set, key_pair, &pairs).await;
@@ -265,7 +267,8 @@ async fn validator_set_rotation() {

        if network != NetworkId::Serai {
          // set the keys if it is an external set
-          let set = ValidatorSet { session: Session(1), network };
+          let set =
+            ExternalValidatorSet { session: Session(1), network: network.try_into().unwrap() };

          // we need the whole substrate key pair to sign the batch
          let (substrate_pair, key_pair) = {
@@ -283,7 +286,12 @@ async fn validator_set_rotation() {
          // provide a batch to complete the handover and retire the previous set
          let mut block_hash = BlockHash([0; 32]);
          OsRng.fill_bytes(&mut block_hash.0);
-          let batch = Batch { network, id: 0, block: block_hash, instructions: vec![] };
+          let batch = Batch {
+            network: network.try_into().unwrap(),
+            id: 0,
+            block: block_hash,
+            instructions: vec![],
+          };
          publish_tx(
            &serai,
            &SeraiInInstructions::execute_batch(SignedBatch {
--- a/substrate/coins/pallet/src/lib.rs
+++ b/substrate/coins/pallet/src/lib.rs
@@ -1,13 +1,13 @@
 #![cfg_attr(not(feature = "std"), no_std)]

-use serai_primitives::{Coin, SubstrateAmount, Balance};
+use serai_primitives::{Balance, Coin, ExternalBalance, SubstrateAmount};

 pub trait AllowMint {
-  fn is_allowed(balance: &Balance) -> bool;
+  fn is_allowed(balance: &ExternalBalance) -> bool;
 }

 impl AllowMint for () {
-  fn is_allowed(_: &Balance) -> bool {
+  fn is_allowed(_: &ExternalBalance) -> bool {
    true
  }
 }
@@ -161,7 +161,10 @@ pub mod pallet {
    pub fn mint(to: Public, balance: Balance) -> Result<(), Error<T, I>> {
      // If the coin isn't Serai, which we're always allowed to mint, and the mint isn't explicitly
      // allowed, error
-      if (balance.coin != Coin::Serai) && (!T::AllowMint::is_allowed(&balance)) {
+      if !ExternalCoin::try_from(balance.coin)
+        .map(|coin| T::AllowMint::is_allowed(&ExternalBalance { coin, amount: balance.amount }))
+        .unwrap_or(true)
+      {
        Err(Error::<T, I>::MintNotAllowed)?;
      }

@@ -230,22 +233,18 @@ pub mod pallet {
    }

    /// Burn `balance` with `OutInstructionWithBalance` from the caller.
-    /// Errors if called for SRI or Instance1 instance of this pallet.
    #[pallet::call_index(2)]
    #[pallet::weight((0, DispatchClass::Normal))] // TODO
    pub fn burn_with_instruction(
      origin: OriginFor<T>,
      instruction: OutInstructionWithBalance,
    ) -> DispatchResult {
-      if instruction.balance.coin == Coin::Serai {
-        Err(Error::<T, I>::BurnWithInstructionNotAllowed)?;
-      }
      if TypeId::of::<I>() == TypeId::of::<LiquidityTokensInstance>() {
        Err(Error::<T, I>::BurnWithInstructionNotAllowed)?;
      }

      let from = ensure_signed(origin)?;
-      Self::burn_internal(from, instruction.balance)?;
+      Self::burn_internal(from, instruction.balance.into())?;
      Self::deposit_event(Event::BurnWithInstruction { from, instruction });
      Ok(())
    }
--- a/substrate/coins/primitives/src/lib.rs
+++ b/substrate/coins/primitives/src/lib.rs
@@ -13,7 +13,7 @@ use serde::{Serialize, Deserialize};
 use scale::{Encode, Decode, MaxEncodedLen};
 use scale_info::TypeInfo;

-use serai_primitives::{Balance, SeraiAddress, ExternalAddress, Data, system_address};
+use serai_primitives::{system_address, Data, ExternalAddress, ExternalBalance, SeraiAddress};

 pub const FEE_ACCOUNT: SeraiAddress = system_address(b"Coins-fees");

@@ -32,7 +32,7 @@ pub struct OutInstruction {
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct OutInstructionWithBalance {
  pub instruction: OutInstruction,
-  pub balance: Balance,
+  pub balance: ExternalBalance,
 }

 #[derive(Clone, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
--- a/substrate/dex/pallet/src/benchmarking.rs
+++ b/substrate/dex/pallet/src/benchmarking.rs
@@ -38,7 +38,7 @@ type AccountIdLookupOf<T> = <<T as frame_system::Config>::Lookup as StaticLookup

 type LiquidityTokens<T> = coins_pallet::Pallet<T, coins_pallet::Instance1>;

-fn create_coin<T: Config>(coin: &Coin) -> (T::AccountId, AccountIdLookupOf<T>) {
+fn create_coin<T: Config>(coin: &ExternalCoin) -> (T::AccountId, AccountIdLookupOf<T>) {
  let caller: T::AccountId = whitelisted_caller();
  let caller_lookup = T::Lookup::unlookup(caller);
  assert_ok!(Coins::<T>::mint(
@@ -47,12 +47,14 @@ fn create_coin<T: Config>(coin: &Coin) -> (T::AccountId, AccountIdLookupOf<T>) {
  ));
  assert_ok!(Coins::<T>::mint(
    caller,
-    Balance { coin: *coin, amount: Amount(INITIAL_COIN_BALANCE) }
+    Balance { coin: (*coin).into(), amount: Amount(INITIAL_COIN_BALANCE) }
  ));
  (caller, caller_lookup)
 }

-fn create_coin_and_pool<T: Config>(coin: &Coin) -> (Coin, T::AccountId, AccountIdLookupOf<T>) {
+fn create_coin_and_pool<T: Config>(
+  coin: &ExternalCoin,
+) -> (ExternalCoin, T::AccountId, AccountIdLookupOf<T>) {
  let (caller, caller_lookup) = create_coin::<T>(coin);
  assert_ok!(Dex::<T>::create_pool(*coin));

@@ -62,7 +64,7 @@ fn create_coin_and_pool<T: Config>(coin: &Coin) -> (Coin, T::AccountId, AccountI
 benchmarks! {
  add_liquidity {
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
+    let coin2 = ExternalCoin::Bitcoin;
    let (lp_token, caller, _) = create_coin_and_pool::<T>(&coin2);
    let add_amount: u64 = 1000;
  }: _(
@@ -75,13 +77,13 @@ benchmarks! {
    caller
  )
  verify {
-    let pool_id = Dex::<T>::get_pool_id(coin1, coin2).unwrap();
+    let pool_id = Dex::<T>::get_pool_id(coin1, coin2.into()).unwrap();
    let lp_minted = Dex::<T>::calc_lp_amount_for_zero_supply(
      add_amount,
      1000u64,
    ).unwrap();
    assert_eq!(
-      LiquidityTokens::<T>::balance(caller, lp_token).0,
+      LiquidityTokens::<T>::balance(caller, lp_token.into()).0,
      lp_minted
    );
    assert_eq!(
@@ -91,7 +93,7 @@ benchmarks! {
    assert_eq!(
      Coins::<T>::balance(
        Dex::<T>::get_pool_account(pool_id),
-        Coin::Bitcoin,
+        ExternalCoin::Bitcoin.into(),
      ).0,
      1000
    );
@@ -99,7 +101,7 @@ benchmarks! {

  remove_liquidity {
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = ExternalCoin::Monero;
    let (lp_token, caller, _) = create_coin_and_pool::<T>(&coin2);
    let add_amount: u64 = 100;
    let lp_minted = Dex::<T>::calc_lp_amount_for_zero_supply(
@@ -117,7 +119,7 @@ benchmarks! {
      0u64,
      caller,
    )?;
-    let total_supply = LiquidityTokens::<T>::supply(lp_token);
+    let total_supply = LiquidityTokens::<T>::supply(Coin::from(lp_token));
  }: _(
    SystemOrigin::Signed(caller),
    coin2,
@@ -127,7 +129,7 @@ benchmarks! {
    caller
  )
  verify {
-    let new_total_supply =  LiquidityTokens::<T>::supply(lp_token);
+    let new_total_supply =  LiquidityTokens::<T>::supply(Coin::from(lp_token));
    assert_eq!(
      new_total_supply,
      total_supply - remove_lp_amount
@@ -136,8 +138,8 @@ benchmarks! {

  swap_exact_tokens_for_tokens {
    let native = Coin::native();
-    let coin1 = Coin::Bitcoin;
-    let coin2 = Coin::Ether;
+    let coin1 = ExternalCoin::Bitcoin;
+    let coin2 = ExternalCoin::Ether;
    let (_, caller, _) = create_coin_and_pool::<T>(&coin1);
    let (_, _) = create_coin::<T>(&coin2);

@@ -168,21 +170,21 @@ benchmarks! {
      caller,
    )?;

-    let path = vec![coin1, native, coin2];
+    let path = vec![Coin::from(coin1), native, Coin::from(coin2)];
    let path = BoundedVec::<_, T::MaxSwapPathLength>::try_from(path).unwrap();
    let native_balance = Coins::<T>::balance(caller, native).0;
-    let coin1_balance = Coins::<T>::balance(caller, Coin::Bitcoin).0;
+    let coin1_balance = Coins::<T>::balance(caller, ExternalCoin::Bitcoin.into()).0;
  }: _(SystemOrigin::Signed(caller), path, swap_amount, 1u64, caller)
  verify {
    let ed_bump = 2u64;
-    let new_coin1_balance = Coins::<T>::balance(caller, Coin::Bitcoin).0;
+    let new_coin1_balance = Coins::<T>::balance(caller, ExternalCoin::Bitcoin.into()).0;
    assert_eq!(new_coin1_balance, coin1_balance - 100u64);
  }

  swap_tokens_for_exact_tokens {
    let native = Coin::native();
-    let coin1 = Coin::Bitcoin;
-    let coin2 = Coin::Ether;
+    let coin1 = ExternalCoin::Bitcoin;
+    let coin2 = ExternalCoin::Ether;
    let (_, caller, _) = create_coin_and_pool::<T>(&coin1);
    let (_, _) = create_coin::<T>(&coin2);

@@ -208,10 +210,10 @@ benchmarks! {
      0u64,
      caller,
    )?;
-    let path = vec![coin1, native, coin2];
+    let path = vec![Coin::from(coin1), native, Coin::from(coin2)];

    let path: BoundedVec<_, T::MaxSwapPathLength> = BoundedVec::try_from(path).unwrap();
-    let coin2_balance = Coins::<T>::balance(caller, Coin::Ether).0;
+    let coin2_balance = Coins::<T>::balance(caller, ExternalCoin::Ether.into()).0;
  }: _(
    SystemOrigin::Signed(caller),
    path.clone(),
@@ -220,7 +222,7 @@ benchmarks! {
    caller
  )
  verify {
-    let new_coin2_balance = Coins::<T>::balance(caller, Coin::Ether).0;
+    let new_coin2_balance = Coins::<T>::balance(caller, ExternalCoin::Ether.into()).0;
    assert_eq!(new_coin2_balance, coin2_balance + 100u64);
  }

--- a/substrate/dex/pallet/src/lib.rs
+++ b/substrate/dex/pallet/src/lib.rs
@@ -78,7 +78,7 @@ mod tests;
 #[cfg(test)]
 mod mock;

-use frame_support::ensure;
+use frame_support::{ensure, pallet_prelude::*, BoundedBTreeSet};
 use frame_system::{
  pallet_prelude::{BlockNumberFor, OriginFor},
  ensure_signed,
@@ -86,9 +86,12 @@ use frame_system::{

 pub use pallet::*;

-use sp_runtime::{traits::TrailingZeroInput, DispatchError};
+use sp_runtime::{
+  traits::{TrailingZeroInput, IntegerSquareRoot},
+  DispatchError,
+};

-use serai_primitives::{NetworkId, Coin, SubstrateAmount};
+use serai_primitives::*;

 use sp_std::prelude::*;
 pub use types::*;
@@ -103,20 +106,16 @@ pub use weights::WeightInfo;
 #[frame_support::pallet]
 pub mod pallet {
  use super::*;
-  use frame_support::{pallet_prelude::*, BoundedBTreeSet};

  use sp_core::sr25519::Public;
-  use sp_runtime::traits::IntegerSquareRoot;

  use coins_pallet::{Pallet as CoinsPallet, Config as CoinsConfig};

-  use serai_primitives::{Coin, Amount, Balance, SubstrateAmount, reverse_lexicographic_order};
-
  /// Pool ID.
  ///
  /// The pool's `AccountId` is derived from this type. Any changes to the type may necessitate a
  /// migration.
-  pub type PoolId = Coin;
+  pub type PoolId = ExternalCoin;

  /// LiquidityTokens Pallet as an instance of coins pallet.
  pub type LiquidityTokens<T> = coins_pallet::Pallet<T, coins_pallet::Instance1>;
@@ -164,7 +163,7 @@ pub mod pallet {
  #[pallet::storage]
  #[pallet::getter(fn spot_price_for_block)]
  pub type SpotPriceForBlock<T: Config> =
-    StorageDoubleMap<_, Identity, BlockNumberFor<T>, Identity, Coin, Amount, OptionQuery>;
+    StorageDoubleMap<_, Identity, BlockNumberFor<T>, Identity, ExternalCoin, Amount, OptionQuery>;

  /// Moving window of prices from each block.
  ///
@@ -173,30 +172,32 @@ pub mod pallet {
  /// low to high.
  #[pallet::storage]
  pub type SpotPrices<T: Config> =
-    StorageDoubleMap<_, Identity, Coin, Identity, [u8; 8], u16, OptionQuery>;
+    StorageDoubleMap<_, Identity, ExternalCoin, Identity, [u8; 8], u16, OptionQuery>;

  // SpotPrices, yet with keys stored in reverse lexicographic order.
  #[pallet::storage]
  pub type ReverseSpotPrices<T: Config> =
-    StorageDoubleMap<_, Identity, Coin, Identity, [u8; 8], (), OptionQuery>;
+    StorageDoubleMap<_, Identity, ExternalCoin, Identity, [u8; 8], (), OptionQuery>;

  /// Current length of the `SpotPrices` map.
  #[pallet::storage]
-  pub type SpotPricesLength<T: Config> = StorageMap<_, Identity, Coin, u16, OptionQuery>;
+  pub type SpotPricesLength<T: Config> = StorageMap<_, Identity, ExternalCoin, u16, OptionQuery>;

  /// Current position of the median within the `SpotPrices` map;
  #[pallet::storage]
-  pub type CurrentMedianPosition<T: Config> = StorageMap<_, Identity, Coin, u16, OptionQuery>;
+  pub type CurrentMedianPosition<T: Config> =
+    StorageMap<_, Identity, ExternalCoin, u16, OptionQuery>;

  /// Current median price of the prices in the `SpotPrices` map at any given time.
  #[pallet::storage]
  #[pallet::getter(fn median_price)]
-  pub type MedianPrice<T: Config> = StorageMap<_, Identity, Coin, Amount, OptionQuery>;
+  pub type MedianPrice<T: Config> = StorageMap<_, Identity, ExternalCoin, Amount, OptionQuery>;

  /// The price used for evaluating economic security, which is the highest observed median price.
  #[pallet::storage]
  #[pallet::getter(fn security_oracle_value)]
-  pub type SecurityOracleValue<T: Config> = StorageMap<_, Identity, Coin, Amount, OptionQuery>;
+  pub type SecurityOracleValue<T: Config> =
+    StorageMap<_, Identity, ExternalCoin, Amount, OptionQuery>;

  /// Total swap volume of a given pool in terms of SRI.
  #[pallet::storage]
@@ -205,7 +206,7 @@ pub mod pallet {

  impl<T: Config> Pallet<T> {
    fn restore_median(
-      coin: Coin,
+      coin: ExternalCoin,
      mut current_median_pos: u16,
      mut current_median: Amount,
      length: u16,
@@ -256,7 +257,7 @@ pub mod pallet {
      MedianPrice::<T>::set(coin, Some(current_median));
    }

-    pub(crate) fn insert_into_median(coin: Coin, amount: Amount) {
+    pub(crate) fn insert_into_median(coin: ExternalCoin, amount: Amount) {
      let new_quantity_of_presences =
        SpotPrices::<T>::get(coin, amount.0.to_be_bytes()).unwrap_or(0) + 1;
      SpotPrices::<T>::set(coin, amount.0.to_be_bytes(), Some(new_quantity_of_presences));
@@ -286,7 +287,7 @@ pub mod pallet {
      Self::restore_median(coin, current_median_pos, current_median, new_length);
    }

-    pub(crate) fn remove_from_median(coin: Coin, amount: Amount) {
+    pub(crate) fn remove_from_median(coin: ExternalCoin, amount: Amount) {
      let mut current_median = MedianPrice::<T>::get(coin).unwrap();

      let mut current_median_pos = CurrentMedianPosition::<T>::get(coin).unwrap();
@@ -451,7 +452,7 @@ pub mod pallet {
        // insert the new price to our oracle window
        // The spot price for 1 coin, in atomic units, to SRI is used
        let sri_per_coin =
-          if let Ok((sri_balance, coin_balance)) = Self::get_reserves(&Coin::native(), &coin) {
+          if let Ok((sri_balance, coin_balance)) = Self::get_reserves(&Coin::Serai, &coin.into()) {
            // We use 1 coin to handle rounding errors which may occur with atomic units
            // If we used atomic units, any coin whose atomic unit is worth less than SRI's atomic
            // unit would cause a 'price' of 0
@@ -493,9 +494,9 @@ pub mod pallet {
    /// (the id of which is returned in the `Event::PoolCreated` event).
    ///
    /// Once a pool is created, someone may [`Pallet::add_liquidity`] to it.
-    pub(crate) fn create_pool(coin: Coin) -> DispatchResult {
+    pub(crate) fn create_pool(coin: ExternalCoin) -> DispatchResult {
      // get pool_id
-      let pool_id = Self::get_pool_id(coin, Coin::Serai)?;
+      let pool_id = Self::get_pool_id(coin.into(), Coin::native())?;
      ensure!(!Pools::<T>::contains_key(pool_id), Error::<T>::PoolExists);

      let pool_account = Self::get_pool_account(pool_id);
@@ -508,9 +509,11 @@ pub mod pallet {

    /// A hook to be called whenever a network's session is rotated.
    pub fn on_new_session(network: NetworkId) {
-      // reset the oracle value
-      for coin in network.coins() {
-        SecurityOracleValue::<T>::set(*coin, Self::median_price(coin));
+      // Only track the price for non-SRI coins as this is SRI denominated
+      if let NetworkId::External(n) = network {
+        for coin in n.coins() {
+          SecurityOracleValue::<T>::set(coin, Self::median_price(coin));
+        }
      }
    }
  }
@@ -532,7 +535,7 @@ pub mod pallet {
    #[allow(clippy::too_many_arguments)]
    pub fn add_liquidity(
      origin: OriginFor<T>,
-      coin: Coin,
+      coin: ExternalCoin,
      coin_desired: SubstrateAmount,
      sri_desired: SubstrateAmount,
      coin_min: SubstrateAmount,
@@ -542,7 +545,7 @@ pub mod pallet {
      let sender = ensure_signed(origin)?;
      ensure!((sri_desired > 0) && (coin_desired > 0), Error::<T>::WrongDesiredAmount);

-      let pool_id = Self::get_pool_id(coin, Coin::Serai)?;
+      let pool_id = Self::get_pool_id(coin.into(), Coin::native())?;

      // create the pool if it doesn't exist. We can just attempt to do that because our checks
      // far enough to allow that.
@@ -552,7 +555,7 @@ pub mod pallet {
      let pool_account = Self::get_pool_account(pool_id);

      let sri_reserve = Self::get_balance(&pool_account, Coin::Serai);
-      let coin_reserve = Self::get_balance(&pool_account, coin);
+      let coin_reserve = Self::get_balance(&pool_account, coin.into());

      let sri_amount: SubstrateAmount;
      let coin_amount: SubstrateAmount;
@@ -583,16 +586,20 @@ pub mod pallet {
        &pool_account,
        Balance { coin: Coin::Serai, amount: Amount(sri_amount) },
      )?;
-      Self::transfer(&sender, &pool_account, Balance { coin, amount: Amount(coin_amount) })?;
+      Self::transfer(
+        &sender,
+        &pool_account,
+        Balance { coin: coin.into(), amount: Amount(coin_amount) },
+      )?;

-      let total_supply = LiquidityTokens::<T>::supply(coin);
+      let total_supply = LiquidityTokens::<T>::supply(Coin::from(coin));

      let lp_token_amount: SubstrateAmount;
      if total_supply == 0 {
        lp_token_amount = Self::calc_lp_amount_for_zero_supply(sri_amount, coin_amount)?;
        LiquidityTokens::<T>::mint(
          pool_account,
-          Balance { coin, amount: Amount(T::MintMinLiquidity::get()) },
+          Balance { coin: coin.into(), amount: Amount(T::MintMinLiquidity::get()) },
        )?;
      } else {
        let side1 = Self::mul_div(sri_amount, total_supply, sri_reserve)?;
@@ -605,7 +612,10 @@ pub mod pallet {
        Error::<T>::InsufficientLiquidityMinted
      );

-      LiquidityTokens::<T>::mint(mint_to, Balance { coin, amount: Amount(lp_token_amount) })?;
+      LiquidityTokens::<T>::mint(
+        mint_to,
+        Balance { coin: coin.into(), amount: Amount(lp_token_amount) },
+      )?;

      Self::deposit_event(Event::LiquidityAdded {
        who: sender,
@@ -626,25 +636,24 @@ pub mod pallet {
    #[pallet::weight(T::WeightInfo::remove_liquidity())]
    pub fn remove_liquidity(
      origin: OriginFor<T>,
-      coin: Coin,
+      coin: ExternalCoin,
      lp_token_burn: SubstrateAmount,
      coin_min_receive: SubstrateAmount,
      sri_min_receive: SubstrateAmount,
      withdraw_to: T::AccountId,
    ) -> DispatchResult {
      let sender = ensure_signed(origin.clone())?;
-      ensure!(coin != Coin::Serai, Error::<T>::EqualCoins);

-      let pool_id = Self::get_pool_id(coin, Coin::Serai).unwrap();
+      let pool_id = Self::get_pool_id(coin.into(), Coin::native()).unwrap();
      ensure!(lp_token_burn > 0, Error::<T>::ZeroLiquidity);

      Pools::<T>::get(pool_id).as_ref().ok_or(Error::<T>::PoolNotFound)?;

      let pool_account = Self::get_pool_account(pool_id);
      let sri_reserve = Self::get_balance(&pool_account, Coin::Serai);
-      let coin_reserve = Self::get_balance(&pool_account, coin);
+      let coin_reserve = Self::get_balance(&pool_account, coin.into());

-      let total_supply = LiquidityTokens::<T>::supply(coin);
+      let total_supply = LiquidityTokens::<T>::supply(Coin::from(coin));
      let lp_redeem_amount = lp_token_burn;

      let sri_amount = Self::mul_div(lp_redeem_amount, sri_reserve, total_supply)?;
@@ -665,14 +674,21 @@ pub mod pallet {
      ensure!(coin_reserve_left >= 1, Error::<T>::ReserveLeftLessThanMinimum);

      // burn the provided lp token amount that includes the fee
-      LiquidityTokens::<T>::burn(origin, Balance { coin, amount: Amount(lp_token_burn) })?;
+      LiquidityTokens::<T>::burn(
+        origin,
+        Balance { coin: coin.into(), amount: Amount(lp_token_burn) },
+      )?;

      Self::transfer(
        &pool_account,
        &withdraw_to,
        Balance { coin: Coin::Serai, amount: Amount(sri_amount) },
      )?;
-      Self::transfer(&pool_account, &withdraw_to, Balance { coin, amount: Amount(coin_amount) })?;
+      Self::transfer(
+        &pool_account,
+        &withdraw_to,
+        Balance { coin: coin.into(), amount: Amount(coin_amount) },
+      )?;

      Self::deposit_event(Event::LiquidityRemoved {
        who: sender,
@@ -920,11 +936,9 @@ pub mod pallet {
    pub fn get_pool_id(coin1: Coin, coin2: Coin) -> Result<PoolId, Error<T>> {
      ensure!((coin1 == Coin::Serai) || (coin2 == Coin::Serai), Error::<T>::PoolNotFound);
      ensure!(coin1 != coin2, Error::<T>::EqualCoins);
-      if coin1 == Coin::Serai {
-        Ok(coin2)
-      } else {
-        Ok(coin1)
-      }
+      ExternalCoin::try_from(coin1)
+        .or_else(|()| ExternalCoin::try_from(coin2))
+        .map_err(|()| Error::<T>::PoolNotFound)
    }

    /// Returns the balance of each coin in the pool.
--- a/substrate/dex/pallet/src/tests.rs
+++ b/substrate/dex/pallet/src/tests.rs
@@ -18,7 +18,10 @@
 // It has been forked into a crate distributed under the AGPL 3.0.
 // Please check the current distribution for up-to-date copyright and licensing information.

-use crate::{mock::*, *};
+use crate::{
+  mock::{*, MEDIAN_PRICE_WINDOW_LENGTH},
+  *,
+};
 use frame_support::{assert_noop, assert_ok};

 pub use coins_pallet as coins;
@@ -72,11 +75,13 @@ fn check_pool_accounts_dont_collide() {
  let mut map = HashSet::new();

  for coin in coins() {
-    let account = Dex::get_pool_account(coin);
-    if map.contains(&account) {
-      panic!("Collision at {coin:?}");
+    if let Coin::External(c) = coin {
+      let account = Dex::get_pool_account(c);
+      if map.contains(&account) {
+        panic!("Collision at {c:?}");
+      }
+      map.insert(account);
    }
-    map.insert(account);
  }
 }

@@ -98,11 +103,11 @@ fn can_create_pool() {
    let coin_account_deposit: u64 = 0;
    let user: PublicKey = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Monero);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(1000) }));
-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_eq!(balance(user, coin1), 1000 - coin_account_deposit);

@@ -111,15 +116,13 @@ fn can_create_pool() {
      [Event::<Test>::PoolCreated { pool_id, pool_account: Dex::get_pool_account(pool_id) }]
    );
    assert_eq!(pools(), vec![pool_id]);
-
-    assert_noop!(Dex::create_pool(coin1), Error::<Test>::EqualCoins);
  });
 }

 #[test]
 fn create_same_pool_twice_should_fail() {
  new_test_ext().execute_with(|| {
-    let coin = Coin::Dai;
+    let coin = ExternalCoin::Dai;
    assert_ok!(Dex::create_pool(coin));
    assert_noop!(Dex::create_pool(coin), Error::<Test>::PoolExists);
  });
@@ -129,13 +132,13 @@ fn create_same_pool_twice_should_fail() {
 fn different_pools_should_have_different_lp_tokens() {
  new_test_ext().execute_with(|| {
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
-    let coin3 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Bitcoin);
+    let coin3 = Coin::External(ExternalCoin::Ether);
    let pool_id_1_2 = Dex::get_pool_id(coin1, coin2).unwrap();
    let pool_id_1_3 = Dex::get_pool_id(coin1, coin3).unwrap();

    let lp_token2_1 = coin2;
-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));
    let lp_token3_1 = coin3;

    assert_eq!(
@@ -146,7 +149,7 @@ fn different_pools_should_have_different_lp_tokens() {
      }]
    );

-    assert_ok!(Dex::create_pool(coin3));
+    assert_ok!(Dex::create_pool(coin3.try_into().unwrap()));
    assert_eq!(
      events(),
      [Event::<Test>::PoolCreated {
@@ -164,13 +167,13 @@ fn can_add_liquidity() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Dai;
-    let coin3 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Dai);
+    let coin3 = Coin::External(ExternalCoin::Monero);

    let lp_token1 = coin2;
-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));
    let lp_token2 = coin3;
-    assert_ok!(Dex::create_pool(coin3));
+    assert_ok!(Dex::create_pool(coin3.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(
      user,
@@ -179,7 +182,15 @@ fn can_add_liquidity() {
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin3, amount: Amount(1000) }));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 10, 10000, 10, 10000, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      10,
+      10000,
+      10,
+      10000,
+      user,
+    ));

    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();
    assert!(events().contains(&Event::<Test>::LiquidityAdded {
@@ -198,7 +209,15 @@ fn can_add_liquidity() {
    assert_eq!(pool_balance(user, lp_token1), 216);

    // try to pass the non-native - native coins, the result should be the same
-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin3, 10, 10000, 10, 10000, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin3.try_into().unwrap(),
+      10,
+      10000,
+      10,
+      10000,
+      user,
+    ));

    let pool_id = Dex::get_pool_id(coin1, coin3).unwrap();
    assert!(events().contains(&Event::<Test>::LiquidityAdded {
@@ -223,12 +242,15 @@ fn add_tiny_liquidity_leads_to_insufficient_liquidity_minted_error() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
+    let coin2 = ExternalCoin::Bitcoin;

    assert_ok!(Dex::create_pool(coin2));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(1000) }));
-    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
+    assert_ok!(CoinsPallet::<Test>::mint(
+      user,
+      Balance { coin: coin2.into(), amount: Amount(1000) }
+    ));

    assert_noop!(
      Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 1, 1, 1, 1, user),
@@ -242,11 +264,11 @@ fn add_tiny_liquidity_directly_to_pool_address() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
-    let coin3 = Coin::Dai;
+    let coin2 = Coin::External(ExternalCoin::Ether);
+    let coin3 = Coin::External(ExternalCoin::Dai);

-    assert_ok!(Dex::create_pool(coin2));
-    assert_ok!(Dex::create_pool(coin3));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));
+    assert_ok!(Dex::create_pool(coin3.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(10000 * 2) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(10000) }));
@@ -259,7 +281,15 @@ fn add_tiny_liquidity_directly_to_pool_address() {
      Balance { coin: coin1, amount: Amount(1000) }
    ));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 10, 10000, 10, 10000, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      10,
+      10000,
+      10,
+      10000,
+      user,
+    ));

    // check the same but for coin3 (non-native token)
    let pallet_account = Dex::get_pool_account(Dex::get_pool_id(coin1, coin3).unwrap());
@@ -267,7 +297,15 @@ fn add_tiny_liquidity_directly_to_pool_address() {
      pallet_account,
      Balance { coin: coin2, amount: Amount(1) }
    ));
-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin3, 10, 10000, 10, 10000, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin3.try_into().unwrap(),
+      10,
+      10000,
+      10,
+      10000,
+      user,
+    ));
  });
 }

@@ -276,11 +314,11 @@ fn can_remove_liquidity() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Monero);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();

    let lp_token = coin2;
-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(
      user,
@@ -290,7 +328,7 @@ fn can_remove_liquidity() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      100000,
      1000000000,
      100000,
@@ -302,7 +340,7 @@ fn can_remove_liquidity() {

    assert_ok!(Dex::remove_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      total_lp_received,
      0,
      0,
@@ -334,15 +372,23 @@ fn can_not_redeem_more_lp_tokens_than_were_minted() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Dai;
+    let coin2 = Coin::External(ExternalCoin::Dai);
    let lp_token = coin2;

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(10000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 10, 10000, 10, 10000, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      10,
+      10000,
+      10,
+      10000,
+      user,
+    ));

    // Only 216 lp_tokens_minted
    assert_eq!(pool_balance(user, lp_token), 216);
@@ -350,7 +396,7 @@ fn can_not_redeem_more_lp_tokens_than_were_minted() {
    assert_noop!(
      Dex::remove_liquidity(
        RuntimeOrigin::signed(user),
-        coin2,
+        coin2.try_into().unwrap(),
        216 + 1, // Try and redeem 10 lp tokens while only 9 minted.
        0,
        0,
@@ -366,14 +412,22 @@ fn can_quote_price() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Ether);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(100000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 200, 10000, 1, 1, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      200,
+      10000,
+      1,
+      1,
+      user,
+    ));

    assert_eq!(
      Dex::quote_price_exact_tokens_for_tokens(Coin::native(), coin2, 3000, false,),
@@ -481,14 +535,22 @@ fn quote_price_exact_tokens_for_tokens_matches_execution() {
    let user = system_address(b"user1").into();
    let user2 = system_address(b"user2").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
+    let coin2 = Coin::External(ExternalCoin::Bitcoin);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(100000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 200, 10000, 1, 1, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      200,
+      10000,
+      1,
+      1,
+      user,
+    ));

    let amount = 1;
    let quoted_price = 49;
@@ -518,14 +580,22 @@ fn quote_price_tokens_for_exact_tokens_matches_execution() {
    let user = system_address(b"user1").into();
    let user2 = system_address(b"user2").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Monero);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(100000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));

-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 200, 10000, 1, 1, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      200,
+      10000,
+      1,
+      1,
+      user,
+    ));

    let amount = 49;
    let quoted_price = 1;
@@ -557,10 +627,10 @@ fn can_swap_with_native() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Ether);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(10000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
@@ -570,7 +640,7 @@ fn can_swap_with_native() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -602,8 +672,8 @@ fn can_swap_with_realistic_values() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let sri = Coin::native();
-    let dai = Coin::Dai;
-    assert_ok!(Dex::create_pool(dai));
+    let dai = Coin::External(ExternalCoin::Dai);
+    assert_ok!(Dex::create_pool(dai.try_into().unwrap()));

    const UNIT: u64 = 1_000_000_000;

@@ -620,7 +690,7 @@ fn can_swap_with_realistic_values() {
    let liquidity_dai = 1_000_000 * UNIT;
    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      dai,
+      dai.try_into().unwrap(),
      liquidity_dai,
      liquidity_sri,
      1,
@@ -653,9 +723,9 @@ fn can_not_swap_in_pool_with_no_liquidity_added_yet() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Monero);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    // Check can't swap an empty pool
    assert_noop!(
@@ -676,11 +746,11 @@ fn check_no_panic_when_try_swap_close_to_empty_pool() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
+    let coin2 = Coin::External(ExternalCoin::Bitcoin);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();
    let lp_token = coin2;

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(10000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
@@ -690,7 +760,7 @@ fn check_no_panic_when_try_swap_close_to_empty_pool() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -714,7 +784,7 @@ fn check_no_panic_when_try_swap_close_to_empty_pool() {

    assert_ok!(Dex::remove_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      lp_token_minted,
      1,
      1,
@@ -787,9 +857,9 @@ fn swap_should_not_work_if_too_much_slippage() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Ether);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(10000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
@@ -799,7 +869,7 @@ fn swap_should_not_work_if_too_much_slippage() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -827,10 +897,10 @@ fn can_swap_tokens_for_exact_tokens() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Dai;
+    let coin2 = Coin::External(ExternalCoin::Dai);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(20000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
@@ -844,7 +914,7 @@ fn can_swap_tokens_for_exact_tokens() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -882,11 +952,11 @@ fn can_swap_tokens_for_exact_tokens_when_not_liquidity_provider() {
    let user = system_address(b"user1").into();
    let user2 = system_address(b"user2").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Monero);
    let pool_id = Dex::get_pool_id(coin1, coin2).unwrap();
    let lp_token = coin2;

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    let base1 = 10000;
    let base2 = 1000;
@@ -903,7 +973,7 @@ fn can_swap_tokens_for_exact_tokens_when_not_liquidity_provider() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user2),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -947,7 +1017,7 @@ fn can_swap_tokens_for_exact_tokens_when_not_liquidity_provider() {

    assert_ok!(Dex::remove_liquidity(
      RuntimeOrigin::signed(user2),
-      coin2,
+      coin2.try_into().unwrap(),
      lp_token_minted,
      0,
      0,
@@ -961,9 +1031,9 @@ fn swap_tokens_for_exact_tokens_should_not_work_if_too_much_slippage() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Ether);

-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(20000) }));
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin2, amount: Amount(1000) }));
@@ -973,7 +1043,7 @@ fn swap_tokens_for_exact_tokens_should_not_work_if_too_much_slippage() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -1001,11 +1071,11 @@ fn swap_exact_tokens_for_tokens_in_multi_hops() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Dai;
-    let coin3 = Coin::Monero;
+    let coin2 = Coin::External(ExternalCoin::Dai);
+    let coin3 = Coin::External(ExternalCoin::Monero);

-    assert_ok!(Dex::create_pool(coin2));
-    assert_ok!(Dex::create_pool(coin3));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));
+    assert_ok!(Dex::create_pool(coin3.try_into().unwrap()));

    let base1 = 10000;
    let base2 = 10000;
@@ -1019,7 +1089,7 @@ fn swap_exact_tokens_for_tokens_in_multi_hops() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -1028,7 +1098,7 @@ fn swap_exact_tokens_for_tokens_in_multi_hops() {
    ));
    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin3,
+      coin3.try_into().unwrap(),
      liquidity3,
      liquidity1,
      1,
@@ -1089,11 +1159,11 @@ fn swap_tokens_for_exact_tokens_in_multi_hops() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
    let coin1 = Coin::native();
-    let coin2 = Coin::Bitcoin;
-    let coin3 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Bitcoin);
+    let coin3 = Coin::External(ExternalCoin::Ether);

-    assert_ok!(Dex::create_pool(coin2));
-    assert_ok!(Dex::create_pool(coin3));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));
+    assert_ok!(Dex::create_pool(coin3.try_into().unwrap()));

    let base1 = 10000;
    let base2 = 10000;
@@ -1107,7 +1177,7 @@ fn swap_tokens_for_exact_tokens_in_multi_hops() {

    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin2,
+      coin2.try_into().unwrap(),
      liquidity2,
      liquidity1,
      1,
@@ -1116,7 +1186,7 @@ fn swap_tokens_for_exact_tokens_in_multi_hops() {
    ));
    assert_ok!(Dex::add_liquidity(
      RuntimeOrigin::signed(user),
-      coin3,
+      coin3.try_into().unwrap(),
      liquidity3,
      liquidity1,
      1,
@@ -1154,7 +1224,7 @@ fn swap_tokens_for_exact_tokens_in_multi_hops() {
 fn can_not_swap_same_coin() {
  new_test_ext().execute_with(|| {
    let user = system_address(b"user1").into();
-    let coin1 = Coin::Dai;
+    let coin1 = Coin::External(ExternalCoin::Dai);
    assert_ok!(CoinsPallet::<Test>::mint(user, Balance { coin: coin1, amount: Amount(1000) }));

    let exchange_amount = 10;
@@ -1188,10 +1258,10 @@ fn validate_pool_id_sorting() {
    // Serai < Bitcoin < Ether < Dai < Monero.
    // coin1 <= coin2 for this test to pass.
    let native = Coin::native();
-    let coin1 = Coin::Bitcoin;
-    let coin2 = Coin::Monero;
-    assert_eq!(Dex::get_pool_id(native, coin2).unwrap(), coin2);
-    assert_eq!(Dex::get_pool_id(coin2, native).unwrap(), coin2);
+    let coin1 = Coin::External(ExternalCoin::Bitcoin);
+    let coin2 = Coin::External(ExternalCoin::Monero);
+    assert_eq!(Dex::get_pool_id(native, coin2).unwrap(), coin2.try_into().unwrap());
+    assert_eq!(Dex::get_pool_id(coin2, native).unwrap(), coin2.try_into().unwrap());
    assert!(matches!(Dex::get_pool_id(native, native), Err(Error::<Test>::EqualCoins)));
    assert!(matches!(Dex::get_pool_id(coin2, coin1), Err(Error::<Test>::PoolNotFound)));
    assert!(coin2 > coin1);
@@ -1216,7 +1286,7 @@ fn cannot_block_pool_creation() {

    // The target pool the user wants to create is Native <=> Coin(2)
    let coin1 = Coin::native();
-    let coin2 = Coin::Ether;
+    let coin2 = Coin::External(ExternalCoin::Ether);

    // Attacker computes the still non-existing pool account for the target pair
    let pool_account = Dex::get_pool_account(Dex::get_pool_id(coin2, coin1).unwrap());
@@ -1238,7 +1308,7 @@ fn cannot_block_pool_creation() {
    }

    // User can still create the pool
-    assert_ok!(Dex::create_pool(coin2));
+    assert_ok!(Dex::create_pool(coin2.try_into().unwrap()));

    // User has to transfer one Coin(2) token to the pool account (otherwise add_liquidity will
    // fail with `CoinTwoDepositDidNotMeetMinimum`), also transfer native token for the same error.
@@ -1256,7 +1326,15 @@ fn cannot_block_pool_creation() {
    ));

    // add_liquidity shouldn't fail because of the number of consumers
-    assert_ok!(Dex::add_liquidity(RuntimeOrigin::signed(user), coin2, 100, 9900, 10, 9900, user,));
+    assert_ok!(Dex::add_liquidity(
+      RuntimeOrigin::signed(user),
+      coin2.try_into().unwrap(),
+      100,
+      9900,
+      10,
+      9900,
+      user,
+    ));
  });
 }

@@ -1281,7 +1359,7 @@ fn test_median_price() {
        prices.push(OsRng.next_u64());
      }
    }
-    let coin = Coin::Bitcoin;
+    let coin = ExternalCoin::Bitcoin;

    assert!(prices.len() >= (2 * usize::from(MEDIAN_PRICE_WINDOW_LENGTH)));
    for i in 0 .. prices.len() {
--- a/substrate/economic-security/pallet/src/lib.rs
+++ b/substrate/economic-security/pallet/src/lib.rs
@@ -24,7 +24,7 @@ pub mod pallet {
  #[pallet::event]
  #[pallet::generate_deposit(fn deposit_event)]
  pub enum Event<T: Config> {
-    EconomicSecurityReached { network: NetworkId },
+    EconomicSecurityReached { network: ExternalNetworkId },
  }

  #[pallet::pallet]
@@ -33,17 +33,19 @@ pub mod pallet {
  #[pallet::storage]
  #[pallet::getter(fn economic_security_block)]
  pub(crate) type EconomicSecurityBlock<T: Config> =
-    StorageMap<_, Identity, NetworkId, BlockNumberFor<T>, OptionQuery>;
+    StorageMap<_, Identity, ExternalNetworkId, BlockNumberFor<T>, OptionQuery>;

  #[pallet::hooks]
  impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
    fn on_initialize(n: BlockNumberFor<T>) -> Weight {
      // we accept we reached economic security once we can mint smallest amount of a network's coin
-      for coin in COINS {
+      for coin in EXTERNAL_COINS {
        let existing = EconomicSecurityBlock::<T>::get(coin.network());
+        // TODO: we don't need to check for oracle value if is_allowed returns false when there is
+        // no coin value
        if existing.is_none() &&
          Dex::<T>::security_oracle_value(coin).is_some() &&
-          <T as CoinsConfig>::AllowMint::is_allowed(&Balance { coin, amount: Amount(1) })
+          <T as CoinsConfig>::AllowMint::is_allowed(&ExternalBalance { coin, amount: Amount(1) })
        {
          EconomicSecurityBlock::<T>::set(coin.network(), Some(n));
          Self::deposit_event(Event::EconomicSecurityReached { network: coin.network() });
--- a/substrate/emissions/pallet/src/lib.rs
+++ b/substrate/emissions/pallet/src/lib.rs
@@ -84,7 +84,8 @@ pub mod pallet {
  pub type CurrentSession<T: Config> = StorageMap<_, Identity, NetworkId, u32, ValueQuery>;

  #[pallet::storage]
-  pub(crate) type LastSwapVolume<T: Config> = StorageMap<_, Identity, Coin, u64, OptionQuery>;
+  pub(crate) type LastSwapVolume<T: Config> =
+    StorageMap<_, Identity, ExternalCoin, u64, OptionQuery>;

  #[pallet::genesis_build]
  impl<T: Config> BuildGenesisConfig for GenesisConfig<T> {
@@ -136,19 +137,16 @@ pub mod pallet {
      let mut total_distance: u64 = 0;
      let reward_this_epoch = if pre_ec_security {
        // calculate distance to economic security per network
-        for n in NETWORKS {
-          if n == NetworkId::Serai {
-            continue;
-          }
-
+        for n in EXTERNAL_NETWORKS {
          let required = ValidatorSets::<T>::required_stake_for_network(n);
-          let mut current = ValidatorSets::<T>::total_allocated_stake(n).unwrap_or(Amount(0)).0;
+          let mut current =
+            ValidatorSets::<T>::total_allocated_stake(NetworkId::from(n)).unwrap_or(Amount(0)).0;
          if current > required {
            current = required;
          }

          let distance = required - current;
-          distances.insert(n, distance);
+          distances.insert(NetworkId::from(n), distance);
          total_distance = total_distance.saturating_add(distance);
        }

@@ -192,9 +190,8 @@ pub mod pallet {
        )
      } else {
        // get swap volumes
-        let mut volume_per_coin: BTreeMap<Coin, u64> = BTreeMap::new();
-        for c in COINS {
-          // this should return 0 for SRI and so it shouldn't affect the total volume.
+        let mut volume_per_coin: BTreeMap<ExternalCoin, u64> = BTreeMap::new();
+        for c in EXTERNAL_COINS {
          let current_volume = Dex::<T>::swap_volume(c).unwrap_or(0);
          let last_volume = LastSwapVolume::<T>::get(c).unwrap_or(0);
          let vol_this_epoch = current_volume.saturating_sub(last_volume);
@@ -209,11 +206,13 @@ pub mod pallet {
        let mut volume_per_network: BTreeMap<NetworkId, u64> = BTreeMap::new();
        for (c, vol) in &volume_per_coin {
          volume_per_network.insert(
-            c.network(),
-            (*volume_per_network.get(&c.network()).unwrap_or(&0)).saturating_add(*vol),
+            c.network().into(),
+            (*volume_per_network.get(&c.network().into()).unwrap_or(&0)).saturating_add(*vol),
          );
          total_volume = total_volume.saturating_add(*vol);
        }
+        // we add the serai network now
+        volume_per_network.insert(NetworkId::Serai, 0);

        (
          volume_per_network
@@ -245,12 +244,13 @@ pub mod pallet {

      // distribute the rewards within the network
      for (n, reward) in rewards_per_network {
-        let (validators_reward, network_pool_reward) = if n == NetworkId::Serai {
-          (reward, 0)
-        } else {
+        let validators_reward = if let NetworkId::External(external_network) = n {
          // calculate pool vs validator share
-          let capacity = ValidatorSets::<T>::total_allocated_stake(n).unwrap_or(Amount(0)).0;
-          let required = ValidatorSets::<T>::required_stake_for_network(n);
+          let capacity =
+            ValidatorSets::<T>::total_allocated_stake(NetworkId::from(external_network))
+              .unwrap_or(Amount(0))
+              .0;
+          let required = ValidatorSets::<T>::required_stake_for_network(external_network);
          let unused_capacity = capacity.saturating_sub(required);

          let distribution = unused_capacity.saturating_mul(ACCURACY_MULTIPLIER) / capacity;
@@ -258,41 +258,44 @@ pub mod pallet {

          let validators_reward = DESIRED_DISTRIBUTION.saturating_mul(reward) / total;
          let network_pool_reward = reward.saturating_sub(validators_reward);
-          (validators_reward, network_pool_reward)
+
+          // send the rest to the pool
+          if network_pool_reward != 0 {
+            // these should be available to unwrap if we have a network_pool_reward. Because that
+            // means we had an unused capacity hence in a post-ec era.
+            let vpn = volume_per_network.as_ref().unwrap();
+            let vpc = volume_per_coin.as_ref().unwrap();
+            for c in external_network.coins() {
+              let pool_reward = u64::try_from(
+                u128::from(network_pool_reward).saturating_mul(u128::from(vpc[&c])) /
+                  u128::from(vpn[&n]),
+              )
+              .unwrap();
+
+              if Coins::<T>::mint(
+                Dex::<T>::get_pool_account(c),
+                Balance { coin: Coin::Serai, amount: Amount(pool_reward) },
+              )
+              .is_err()
+              {
+                // TODO: log the failure
+                continue;
+              }
+            }
+          }
+
+          validators_reward
+        } else {
+          reward
        };

        // distribute validators rewards
        Self::distribute_to_validators(n, validators_reward);
-
-        // send the rest to the pool
-        if network_pool_reward != 0 {
-          // these should be available to unwrap if we have a network_pool_reward. Because that
-          // means we had an unused capacity hence in a post-ec era.
-          let vpn = volume_per_network.as_ref().unwrap();
-          let vpc = volume_per_coin.as_ref().unwrap();
-          for c in n.coins() {
-            let pool_reward = u64::try_from(
-              u128::from(network_pool_reward).saturating_mul(u128::from(vpc[c])) /
-                u128::from(vpn[&n]),
-            )
-            .unwrap();
-
-            if Coins::<T>::mint(
-              Dex::<T>::get_pool_account(*c),
-              Balance { coin: Coin::Serai, amount: Amount(pool_reward) },
-            )
-            .is_err()
-            {
-              // TODO: log the failure
-              continue;
-            }
-          }
-        }
      }

      // TODO: we have the past session participants here in the emissions pallet so that we can
      // distribute rewards to them in the next session. Ideally we should be able to fetch this
-      // information from valiadtor sets pallet.
+      // information from validator sets pallet.
      Self::update_participants();
      Weight::zero() // TODO
    }
@@ -318,11 +321,7 @@ pub mod pallet {

    /// Returns true if any of the external networks haven't reached economic security yet.
    fn pre_ec_security() -> bool {
-      for n in NETWORKS {
-        if n == NetworkId::Serai {
-          continue;
-        }
-
+      for n in EXTERNAL_NETWORKS {
        if EconomicSecurity::<T>::economic_security_block(n).is_none() {
          return true;
        }
@@ -362,16 +361,30 @@ pub mod pallet {
    pub fn swap_to_staked_sri(
      to: PublicKey,
      network: NetworkId,
-      balance: Balance,
+      balance: ExternalBalance,
    ) -> DispatchResult {
      // check the network didn't reach the economic security yet
-      if EconomicSecurity::<T>::economic_security_block(network).is_some() {
-        Err(Error::<T>::NetworkHasEconomicSecurity)?;
+      if let NetworkId::External(n) = network {
+        if EconomicSecurity::<T>::economic_security_block(n).is_some() {
+          Err(Error::<T>::NetworkHasEconomicSecurity)?;
+        }
+      } else {
+        // we target 20% of the network's stake to be behind the Serai network
+        let mut total_stake = 0;
+        for n in NETWORKS {
+          total_stake += ValidatorSets::<T>::total_allocated_stake(n).unwrap_or(Amount(0)).0;
+        }
+
+        let stake = ValidatorSets::<T>::total_allocated_stake(network).unwrap_or(Amount(0)).0;
+        let desired_stake = total_stake / (100 / SERAI_VALIDATORS_DESIRED_PERCENTAGE);
+        if stake >= desired_stake {
+          Err(Error::<T>::NetworkHasEconomicSecurity)?;
+        }
      }

      // swap half of the liquidity for SRI to form PoL.
      let half = balance.amount.0 / 2;
-      let path = BoundedVec::try_from(vec![balance.coin, Coin::Serai]).unwrap();
+      let path = BoundedVec::try_from(vec![balance.coin.into(), Coin::Serai]).unwrap();
      let origin = RawOrigin::Signed(POL_ACCOUNT.into());
      Dex::<T>::swap_exact_tokens_for_tokens(
        origin.clone().into(),
--- a/substrate/genesis-liquidity/pallet/src/lib.rs
+++ b/substrate/genesis-liquidity/pallet/src/lib.rs
@@ -54,9 +54,9 @@ pub mod pallet {
  #[pallet::event]
  #[pallet::generate_deposit(fn deposit_event)]
  pub enum Event<T: Config> {
-    GenesisLiquidityAdded { by: SeraiAddress, balance: Balance },
-    GenesisLiquidityRemoved { by: SeraiAddress, balance: Balance },
-    GenesisLiquidityAddedToPool { coin1: Balance, sri: Amount },
+    GenesisLiquidityAdded { by: SeraiAddress, balance: ExternalBalance },
+    GenesisLiquidityRemoved { by: SeraiAddress, balance: ExternalBalance },
+    GenesisLiquidityAddedToPool { coin: ExternalBalance, sri: Amount },
  }

  #[pallet::pallet]
@@ -64,15 +64,23 @@ pub mod pallet {

  /// Keeps shares and the amount of coins per account.
  #[pallet::storage]
-  pub(crate) type Liquidity<T: Config> =
-    StorageDoubleMap<_, Identity, Coin, Blake2_128Concat, PublicKey, LiquidityAmount, OptionQuery>;
+  pub(crate) type Liquidity<T: Config> = StorageDoubleMap<
+    _,
+    Identity,
+    ExternalCoin,
+    Blake2_128Concat,
+    PublicKey,
+    LiquidityAmount,
+    OptionQuery,
+  >;

  /// Keeps the total shares and the total amount of coins per coin.
  #[pallet::storage]
-  pub(crate) type Supply<T: Config> = StorageMap<_, Identity, Coin, LiquidityAmount, OptionQuery>;
+  pub(crate) type Supply<T: Config> =
+    StorageMap<_, Identity, ExternalCoin, LiquidityAmount, OptionQuery>;

  #[pallet::storage]
-  pub(crate) type Oracle<T: Config> = StorageMap<_, Identity, Coin, u64, OptionQuery>;
+  pub(crate) type Oracle<T: Config> = StorageMap<_, Identity, ExternalCoin, u64, OptionQuery>;

  #[pallet::storage]
  #[pallet::getter(fn genesis_complete_block)]
@@ -102,11 +110,7 @@ pub mod pallet {
        // get pool & total values
        let mut pool_values = vec![];
        let mut total_value: u128 = 0;
-        for coin in COINS {
-          if coin == Coin::Serai {
-            continue;
-          }
-
+        for coin in EXTERNAL_COINS {
          // initial coin value in terms of btc
          let Some(value) = Oracle::<T>::get(coin) else {
            continue;
@@ -158,7 +162,7 @@ pub mod pallet {

          // let everyone know about the event
          Self::deposit_event(Event::GenesisLiquidityAddedToPool {
-            coin1: Balance { coin, amount: Amount(u64::try_from(pool_amount).unwrap()) },
+            coin: ExternalBalance { coin, amount: Amount(u64::try_from(pool_amount).unwrap()) },
            sri: Amount(sri_amount),
          });
        }
@@ -180,7 +184,7 @@ pub mod pallet {
  impl<T: Config> Pallet<T> {
    /// Add genesis liquidity for the given account. All accounts that provide liquidity
    /// will receive the genesis SRI according to their liquidity ratio.
-    pub fn add_coin_liquidity(account: PublicKey, balance: Balance) -> DispatchResult {
+    pub fn add_coin_liquidity(account: PublicKey, balance: ExternalBalance) -> DispatchResult {
      // check we are still in genesis period
      if Self::genesis_ended() {
        Err(Error::<T>::GenesisPeriodEnded)?;
@@ -227,7 +231,7 @@ pub mod pallet {
    /// If networks is yet to be reached that threshold, None is returned.
    fn blocks_since_ec_security() -> Option<u64> {
      let mut min = u64::MAX;
-      for n in NETWORKS {
+      for n in EXTERNAL_NETWORKS {
        let ec_security_block =
          EconomicSecurity::<T>::economic_security_block(n)?.saturated_into::<u64>();
        let current = <frame_system::Pallet<T>>::block_number().saturated_into::<u64>();
@@ -243,11 +247,7 @@ pub mod pallet {
    }

    fn oraclization_is_done() -> bool {
-      for c in COINS {
-        if c == Coin::Serai {
-          continue;
-        }
-
+      for c in EXTERNAL_COINS {
        if Oracle::<T>::get(c).is_none() {
          return false;
        }
@@ -276,7 +276,7 @@ pub mod pallet {
    /// Remove the provided genesis liquidity for an account.
    #[pallet::call_index(0)]
    #[pallet::weight((0, DispatchClass::Operational))] // TODO
-    pub fn remove_coin_liquidity(origin: OriginFor<T>, balance: Balance) -> DispatchResult {
+    pub fn remove_coin_liquidity(origin: OriginFor<T>, balance: ExternalBalance) -> DispatchResult {
      let account = ensure_signed(origin)?;
      let origin = RawOrigin::Signed(GENESIS_LIQUIDITY_ACCOUNT.into());
      let supply = Supply::<T>::get(balance.coin).ok_or(Error::<T>::NotEnoughLiquidity)?;
@@ -297,7 +297,7 @@ pub mod pallet {

        // remove liquidity from pool
        let prev_sri = Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), Coin::Serai);
-        let prev_coin = Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), balance.coin);
+        let prev_coin = Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), balance.coin.into());
        Dex::<T>::remove_liquidity(
          origin.clone().into(),
          balance.coin,
@@ -307,7 +307,8 @@ pub mod pallet {
          GENESIS_LIQUIDITY_ACCOUNT.into(),
        )?;
        let current_sri = Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), Coin::Serai);
-        let current_coin = Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), balance.coin);
+        let current_coin =
+          Coins::<T>::balance(GENESIS_LIQUIDITY_ACCOUNT.into(), balance.coin.into());

        // burn the SRI if necessary
        // TODO: take into consideration movement between pools.
@@ -333,7 +334,7 @@ pub mod pallet {
        Coins::<T>::transfer(
          origin.clone().into(),
          account,
-          Balance { coin: balance.coin, amount: Amount(coin_out) },
+          Balance { coin: balance.coin.into(), amount: Amount(coin_out) },
        )?;
        Coins::<T>::transfer(
          origin.into(),
@@ -366,7 +367,7 @@ pub mod pallet {
        Coins::<T>::transfer(
          origin.into(),
          account,
-          Balance { coin: balance.coin, amount: Amount(existing.coins) },
+          Balance { coin: balance.coin.into(), amount: Amount(existing.coins) },
        )?;

        (
@@ -404,10 +405,10 @@ pub mod pallet {
      ensure_none(origin)?;

      // set their relative values
-      Oracle::<T>::set(Coin::Bitcoin, Some(10u64.pow(Coin::Bitcoin.decimals())));
-      Oracle::<T>::set(Coin::Monero, Some(values.monero));
-      Oracle::<T>::set(Coin::Ether, Some(values.ether));
-      Oracle::<T>::set(Coin::Dai, Some(values.dai));
+      Oracle::<T>::set(ExternalCoin::Bitcoin, Some(10u64.pow(ExternalCoin::Bitcoin.decimals())));
+      Oracle::<T>::set(ExternalCoin::Monero, Some(values.monero));
+      Oracle::<T>::set(ExternalCoin::Ether, Some(values.ether));
+      Oracle::<T>::set(ExternalCoin::Dai, Some(values.dai));
      Ok(())
    }
  }
--- a/substrate/in-instructions/pallet/src/lib.rs
+++ b/substrate/in-instructions/pallet/src/lib.rs
@@ -4,7 +4,7 @@

 use sp_io::hashing::blake2_256;

-use serai_primitives::{BlockHash, NetworkId};
+use serai_primitives::*;

 pub use in_instructions_primitives as primitives;
 use primitives::*;
@@ -23,8 +23,6 @@ pub mod pallet {
  use sp_runtime::traits::Zero;
  use sp_core::sr25519::Public;

-  use serai_primitives::{Coin, Amount, Balance};
-
  use frame_support::pallet_prelude::*;
  use frame_system::{pallet_prelude::*, RawOrigin};

@@ -34,7 +32,7 @@ pub mod pallet {
  };
  use dex_pallet::{Config as DexConfig, Pallet as Dex};
  use validator_sets_pallet::{
-    primitives::{Session, ValidatorSet},
+    primitives::{Session, ValidatorSet, ExternalValidatorSet},
    Config as ValidatorSetsConfig, Pallet as ValidatorSets,
  };

@@ -60,9 +58,9 @@ pub mod pallet {
  #[pallet::event]
  #[pallet::generate_deposit(fn deposit_event)]
  pub enum Event<T: Config> {
-    Batch { network: NetworkId, id: u32, block: BlockHash, instructions_hash: [u8; 32] },
-    InstructionFailure { network: NetworkId, id: u32, index: u32 },
-    Halt { network: NetworkId },
+    Batch { network: ExternalNetworkId, id: u32, block: BlockHash, instructions_hash: [u8; 32] },
+    InstructionFailure { network: ExternalNetworkId, id: u32, index: u32 },
+    Halt { network: ExternalNetworkId },
  }

  #[pallet::error]
@@ -77,23 +75,24 @@ pub mod pallet {
  // The ID of the last executed Batch for a network.
  #[pallet::storage]
  #[pallet::getter(fn batches)]
-  pub(crate) type LastBatch<T: Config> = StorageMap<_, Identity, NetworkId, u32, OptionQuery>;
+  pub(crate) type LastBatch<T: Config> =
+    StorageMap<_, Identity, ExternalNetworkId, u32, OptionQuery>;

  // The last Serai block in which this validator set included a batch
  #[pallet::storage]
  #[pallet::getter(fn last_batch_block)]
  pub(crate) type LastBatchBlock<T: Config> =
-    StorageMap<_, Identity, NetworkId, BlockNumberFor<T>, OptionQuery>;
+    StorageMap<_, Identity, ExternalNetworkId, BlockNumberFor<T>, OptionQuery>;

  // Halted networks.
  #[pallet::storage]
-  pub(crate) type Halted<T: Config> = StorageMap<_, Identity, NetworkId, (), OptionQuery>;
+  pub(crate) type Halted<T: Config> = StorageMap<_, Identity, ExternalNetworkId, (), OptionQuery>;

  // The latest block a network has acknowledged as finalized
  #[pallet::storage]
  #[pallet::getter(fn latest_network_block)]
  pub(crate) type LatestNetworkBlock<T: Config> =
-    StorageMap<_, Identity, NetworkId, BlockHash, OptionQuery>;
+    StorageMap<_, Identity, ExternalNetworkId, BlockHash, OptionQuery>;

  impl<T: Config> Pallet<T> {
    // Use a dedicated transaction layer when executing this InInstruction
@@ -102,7 +101,7 @@ pub mod pallet {
    fn execute(instruction: InInstructionWithBalance) -> Result<(), DispatchError> {
      match instruction.instruction {
        InInstruction::Transfer(address) => {
-          Coins::<T>::mint(address.into(), instruction.balance)?;
+          Coins::<T>::mint(address.into(), instruction.balance.into())?;
        }
        InInstruction::Dex(call) => {
          // This will only be initiated by external chain transactions. That is why we only need
@@ -114,11 +113,11 @@ pub mod pallet {
              let coin = instruction.balance.coin;

              // mint the given coin on the account
-              Coins::<T>::mint(IN_INSTRUCTION_EXECUTOR.into(), instruction.balance)?;
+              Coins::<T>::mint(IN_INSTRUCTION_EXECUTOR.into(), instruction.balance.into())?;

              // swap half of it for SRI
              let half = instruction.balance.amount.0 / 2;
-              let path = BoundedVec::try_from(vec![coin, Coin::Serai]).unwrap();
+              let path = BoundedVec::try_from(vec![coin.into(), Coin::Serai]).unwrap();
              Dex::<T>::swap_exact_tokens_for_tokens(
                origin.clone().into(),
                path,
@@ -144,13 +143,13 @@ pub mod pallet {
              // TODO: minimums are set to 1 above to guarantee successful adding liq call.
              // Ideally we either get this info from user or send the leftovers back to user.
              // Let's send the leftovers back to user for now.
-              let coin_balance = Coins::<T>::balance(IN_INSTRUCTION_EXECUTOR.into(), coin);
+              let coin_balance = Coins::<T>::balance(IN_INSTRUCTION_EXECUTOR.into(), coin.into());
              let sri_balance = Coins::<T>::balance(IN_INSTRUCTION_EXECUTOR.into(), Coin::Serai);
              if coin_balance != Amount(0) {
                Coins::<T>::transfer_internal(
                  IN_INSTRUCTION_EXECUTOR.into(),
                  address.into(),
-                  Balance { coin, amount: coin_balance },
+                  Balance { coin: coin.into(), amount: coin_balance },
                )?;
              }
              if sri_balance != Amount(0) {
@@ -171,10 +170,10 @@ pub mod pallet {
              }

              // mint the given coin on our account
-              Coins::<T>::mint(IN_INSTRUCTION_EXECUTOR.into(), instruction.balance)?;
+              Coins::<T>::mint(IN_INSTRUCTION_EXECUTOR.into(), instruction.balance.into())?;

              // get the path
-              let mut path = vec![instruction.balance.coin, Coin::Serai];
+              let mut path = vec![instruction.balance.coin.into(), Coin::Serai];
              if !native_coin {
                path.push(out_balance.coin);
              }
@@ -210,7 +209,10 @@ pub mod pallet {
                    // TODO: Properly pass data. Replace address with an OutInstruction entirely?
                    data: None,
                  },
-                  balance: Balance { coin: out_balance.coin, amount: coin_balance },
+                  balance: ExternalBalance {
+                    coin: out_balance.coin.try_into().unwrap(),
+                    amount: coin_balance,
+                  },
                };
                Coins::<T>::burn_with_instruction(origin.into(), instruction)?;
              }
@@ -218,18 +220,18 @@ pub mod pallet {
          }
        }
        InInstruction::GenesisLiquidity(address) => {
-          Coins::<T>::mint(GENESIS_LIQUIDITY_ACCOUNT.into(), instruction.balance)?;
+          Coins::<T>::mint(GENESIS_LIQUIDITY_ACCOUNT.into(), instruction.balance.into())?;
          GenesisLiq::<T>::add_coin_liquidity(address.into(), instruction.balance)?;
        }
        InInstruction::SwapToStakedSRI(address, network) => {
-          Coins::<T>::mint(POL_ACCOUNT.into(), instruction.balance)?;
+          Coins::<T>::mint(POL_ACCOUNT.into(), instruction.balance.into())?;
          Emissions::<T>::swap_to_staked_sri(address.into(), network, instruction.balance)?;
        }
      }
      Ok(())
    }

-    pub fn halt(network: NetworkId) -> Result<(), DispatchError> {
+    pub fn halt(network: ExternalNetworkId) -> Result<(), DispatchError> {
      Halted::<T>::set(network, Some(()));
      Self::deposit_event(Event::Halt { network });
      Ok(())
@@ -237,13 +239,13 @@ pub mod pallet {
  }

  fn keys_for_network<T: Config>(
-    network: NetworkId,
+    network: ExternalNetworkId,
  ) -> Result<(Session, Option<Public>, Option<Public>), InvalidTransaction> {
    // If there's no session set, and therefore no keys set, then this must be an invalid signature
-    let Some(session) = ValidatorSets::<T>::session(network) else {
+    let Some(session) = ValidatorSets::<T>::session(NetworkId::from(network)) else {
      Err(InvalidTransaction::BadProof)?
    };
-    let mut set = ValidatorSet { session, network };
+    let mut set = ExternalValidatorSet { network, session };
    let latest = ValidatorSets::<T>::keys(set).map(|keys| keys.0);
    let prior = if set.session.0 != 0 {
      set.session.0 -= 1;
@@ -303,12 +305,7 @@ pub mod pallet {
      if batch.batch.encode().len() > MAX_BATCH_SIZE {
        Err(InvalidTransaction::ExhaustsResources)?;
      }
-
      let network = batch.batch.network;
-      // Don't allow the Serai set to publish `Batch`s as-if Serai itself was an external network
-      if network == NetworkId::Serai {
-        Err(InvalidTransaction::Custom(0))?;
-      }

      // verify the signature
      let (current_session, prior, current) = keys_for_network::<T>(network)?;
@@ -336,7 +333,7 @@ pub mod pallet {
      // `Batch`s published by the prior key, meaning they are accepting the hand-over.
      if prior.is_some() && (!valid_by_prior) {
        ValidatorSets::<T>::retire_set(ValidatorSet {
-          network,
+          network: network.into(),
          session: Session(current_session.0 - 1),
        });
      }
--- a/substrate/in-instructions/primitives/src/lib.rs
+++ b/substrate/in-instructions/primitives/src/lib.rs
@@ -20,7 +20,7 @@ use sp_std::vec::Vec;
 use sp_runtime::RuntimeDebug;

 #[rustfmt::skip]
-use serai_primitives::{BlockHash, Balance, NetworkId, SeraiAddress, ExternalAddress, system_address};
+use serai_primitives::{BlockHash, Balance, ExternalNetworkId, NetworkId, SeraiAddress, ExternalBalance, ExternalAddress, system_address};

 mod shorthand;
 pub use shorthand::*;
@@ -97,7 +97,7 @@ pub struct RefundableInInstruction {
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct InInstructionWithBalance {
  pub instruction: InInstruction,
-  pub balance: Balance,
+  pub balance: ExternalBalance,
 }

 #[derive(Clone, PartialEq, Eq, Encode, Decode, TypeInfo, RuntimeDebug)]
@@ -105,7 +105,7 @@ pub struct InInstructionWithBalance {
 #[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Batch {
-  pub network: NetworkId,
+  pub network: ExternalNetworkId,
  pub id: u32,
  pub block: BlockHash,
  pub instructions: Vec<InInstructionWithBalance>,
--- a/substrate/in-instructions/primitives/src/shorthand.rs
+++ b/substrate/in-instructions/primitives/src/shorthand.rs
@@ -9,7 +9,7 @@ use serde::{Serialize, Deserialize};
 use scale::{Encode, Decode, MaxEncodedLen};
 use scale_info::TypeInfo;

-use serai_primitives::{Coin, Amount, SeraiAddress, ExternalAddress};
+use serai_primitives::{Amount, ExternalAddress, ExternalCoin, SeraiAddress};

 use coins_primitives::OutInstruction;

@@ -25,7 +25,7 @@ pub enum Shorthand {
  Raw(RefundableInInstruction),
  Swap {
    origin: Option<ExternalAddress>,
-    coin: Coin,
+    coin: ExternalCoin,
    minimum: Amount,
    out: OutInstruction,
  },
--- a/substrate/node/src/chain_spec.rs
+++ b/substrate/node/src/chain_spec.rs
@@ -33,6 +33,22 @@ fn devnet_genesis(
  endowed_accounts: Vec<PublicKey>,
 ) -> RuntimeGenesisConfig {
  let validators = validators.iter().map(|name| account_from_name(name)).collect::<Vec<_>>();
+  let key_shares = NETWORKS
+    .iter()
+    .map(|network| match network {
+      NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
+      NetworkId::External(ExternalNetworkId::Bitcoin) => {
+        (NetworkId::External(ExternalNetworkId::Bitcoin), Amount(1_000_000 * 10_u64.pow(8)))
+      }
+      NetworkId::External(ExternalNetworkId::Ethereum) => {
+        (NetworkId::External(ExternalNetworkId::Ethereum), Amount(1_000_000 * 10_u64.pow(8)))
+      }
+      NetworkId::External(ExternalNetworkId::Monero) => {
+        (NetworkId::External(ExternalNetworkId::Monero), Amount(100_000 * 10_u64.pow(8)))
+      }
+    })
+    .collect::<Vec<_>>();
+
  RuntimeGenesisConfig {
    system: SystemConfig { code: wasm_binary.to_vec(), _config: PhantomData },

@@ -47,29 +63,10 @@ fn devnet_genesis(
    },

    validator_sets: ValidatorSetsConfig {
-      networks: serai_runtime::primitives::NETWORKS
-        .iter()
-        .map(|network| match network {
-          NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
-          NetworkId::Bitcoin => (NetworkId::Bitcoin, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Ethereum => (NetworkId::Ethereum, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Monero => (NetworkId::Monero, Amount(100_000 * 10_u64.pow(8))),
-        })
-        .collect(),
-      participants: validators.clone(),
-    },
-    emissions: EmissionsConfig {
-      networks: serai_runtime::primitives::NETWORKS
-        .iter()
-        .map(|network| match network {
-          NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
-          NetworkId::Bitcoin => (NetworkId::Bitcoin, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Ethereum => (NetworkId::Ethereum, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Monero => (NetworkId::Monero, Amount(100_000 * 10_u64.pow(8))),
-        })
-        .collect(),
+      networks: key_shares.clone(),
      participants: validators.clone(),
    },
+    emissions: EmissionsConfig { networks: key_shares, participants: validators.clone() },
    signals: SignalsConfig::default(),
    babe: BabeConfig {
      authorities: validators.iter().map(|validator| ((*validator).into(), 1)).collect(),
@@ -88,6 +85,21 @@ fn testnet_genesis(wasm_binary: &[u8], validators: Vec<&'static str>) -> Runtime
    .into_iter()
    .map(|validator| Public::decode(&mut hex::decode(validator).unwrap().as_slice()).unwrap())
    .collect::<Vec<_>>();
+  let key_shares = NETWORKS
+    .iter()
+    .map(|network| match network {
+      NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
+      NetworkId::External(ExternalNetworkId::Bitcoin) => {
+        (NetworkId::External(ExternalNetworkId::Bitcoin), Amount(1_000_000 * 10_u64.pow(8)))
+      }
+      NetworkId::External(ExternalNetworkId::Ethereum) => {
+        (NetworkId::External(ExternalNetworkId::Ethereum), Amount(1_000_000 * 10_u64.pow(8)))
+      }
+      NetworkId::External(ExternalNetworkId::Monero) => {
+        (NetworkId::External(ExternalNetworkId::Monero), Amount(100_000 * 10_u64.pow(8)))
+      }
+    })
+    .collect::<Vec<_>>();

  assert_eq!(validators.iter().collect::<HashSet<_>>().len(), validators.len());

@@ -105,29 +117,10 @@ fn testnet_genesis(wasm_binary: &[u8], validators: Vec<&'static str>) -> Runtime
    },

    validator_sets: ValidatorSetsConfig {
-      networks: serai_runtime::primitives::NETWORKS
-        .iter()
-        .map(|network| match network {
-          NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
-          NetworkId::Bitcoin => (NetworkId::Bitcoin, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Ethereum => (NetworkId::Ethereum, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Monero => (NetworkId::Monero, Amount(100_000 * 10_u64.pow(8))),
-        })
-        .collect(),
-      participants: validators.clone(),
-    },
-    emissions: EmissionsConfig {
-      networks: serai_runtime::primitives::NETWORKS
-        .iter()
-        .map(|network| match network {
-          NetworkId::Serai => (NetworkId::Serai, Amount(50_000 * 10_u64.pow(8))),
-          NetworkId::Bitcoin => (NetworkId::Bitcoin, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Ethereum => (NetworkId::Ethereum, Amount(1_000_000 * 10_u64.pow(8))),
-          NetworkId::Monero => (NetworkId::Monero, Amount(100_000 * 10_u64.pow(8))),
-        })
-        .collect(),
+      networks: key_shares.clone(),
      participants: validators.clone(),
    },
+    emissions: EmissionsConfig { networks: key_shares, participants: validators.clone() },
    signals: SignalsConfig::default(),
    babe: BabeConfig {
      authorities: validators.iter().map(|validator| ((*validator).into(), 1)).collect(),
--- a/substrate/primitives/Cargo.toml
+++ b/substrate/primitives/Cargo.toml
@@ -28,6 +28,7 @@ sp-application-crypto = { git = "https://github.com/serai-dex/substrate", defaul
 sp-core = { git = "https://github.com/serai-dex/substrate", default-features = false }
 sp-runtime = { 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 }

 frame-support = { git = "https://github.com/serai-dex/substrate", default-features = false }

@@ -35,7 +36,7 @@ frame-support = { git = "https://github.com/serai-dex/substrate", default-featur
 rand_core = { version = "0.6", default-features = false, features = ["getrandom"] }

 [features]
-std = ["zeroize", "scale/std", "borsh?/std", "serde?/std", "scale-info/std", "sp-core/std", "sp-runtime/std", "frame-support/std"]
+std = ["zeroize", "scale/std", "borsh?/std", "serde?/std", "scale-info/std", "sp-core/std", "sp-runtime/std", "sp-std/std", "frame-support/std"]
 borsh = ["dep:borsh"]
 serde = ["dep:serde"]
 default = ["std"]
--- a/substrate/primitives/src/amount.rs
+++ b/substrate/primitives/src/amount.rs
@@ -29,6 +29,8 @@ pub type SubstrateAmount = u64;
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Amount(pub SubstrateAmount);

+// TODO: these impl shouldn't panic and return error to be dealt with.
+// Otherwise we might have a panic that stops the network.
 impl Add for Amount {
  type Output = Amount;
  fn add(self, other: Amount) -> Amount {
--- a/substrate/primitives/src/balance.rs
+++ b/substrate/primitives/src/balance.rs
@@ -11,7 +11,7 @@ use serde::{Serialize, Deserialize};
 use scale::{Encode, Decode, MaxEncodedLen};
 use scale_info::TypeInfo;

-use crate::{Coin, Amount};
+use crate::{Amount, Coin, ExternalCoin};

 /// The type used for balances (a Coin and Balance).
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
@@ -23,6 +23,34 @@ pub struct Balance {
  pub amount: Amount,
 }

+/// The type used for balances (a Coin and Balance).
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
+#[cfg_attr(feature = "std", derive(Zeroize))]
+#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct ExternalBalance {
+  pub coin: ExternalCoin,
+  pub amount: Amount,
+}
+
+impl From<ExternalBalance> for Balance {
+  fn from(balance: ExternalBalance) -> Self {
+    Balance { coin: balance.coin.into(), amount: balance.amount }
+  }
+}
+
+impl TryFrom<Balance> for ExternalBalance {
+  type Error = ();
+
+  fn try_from(balance: Balance) -> Result<Self, Self::Error> {
+    match balance.coin {
+      Coin::Serai => Err(())?,
+      Coin::External(coin) => Ok(ExternalBalance { coin, amount: balance.amount }),
+    }
+  }
+}
+
+// TODO: these impl either should be removed or return errors in case of overflows
 impl Add<Amount> for Balance {
  type Output = Balance;
  fn add(self, other: Amount) -> Balance {
--- a/substrate/primitives/src/networks.rs
+++ b/substrate/primitives/src/networks.rs
@@ -1,7 +1,7 @@
 #[cfg(feature = "std")]
 use zeroize::Zeroize;

-use scale::{Encode, Decode, MaxEncodedLen};
+use scale::{Decode, Encode, EncodeLike, MaxEncodedLen};
 use scale_info::TypeInfo;

 #[cfg(feature = "borsh")]
@@ -10,54 +10,342 @@ use borsh::{BorshSerialize, BorshDeserialize};
 use serde::{Serialize, Deserialize};

 use sp_core::{ConstU32, bounded::BoundedVec};
+use sp_std::{vec, vec::Vec};

 #[cfg(feature = "borsh")]
 use crate::{borsh_serialize_bounded_vec, borsh_deserialize_bounded_vec};

-/// The type used to identify networks.
-#[derive(
-  Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, PartialOrd, Ord, MaxEncodedLen, TypeInfo,
-)]
+/// The type used to identify external networks.
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, PartialOrd, Ord, TypeInfo)]
 #[cfg_attr(feature = "std", derive(Zeroize))]
-#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub enum NetworkId {
-  Serai,
+pub enum ExternalNetworkId {
  Bitcoin,
  Ethereum,
  Monero,
 }
-impl NetworkId {
-  pub fn coins(&self) -> &'static [Coin] {
+
+impl Encode for ExternalNetworkId {
+  fn encode(&self) -> Vec<u8> {
    match self {
-      Self::Serai => &[Coin::Serai],
-      Self::Bitcoin => &[Coin::Bitcoin],
-      Self::Ethereum => &[Coin::Ether, Coin::Dai],
-      Self::Monero => &[Coin::Monero],
+      ExternalNetworkId::Bitcoin => vec![1],
+      ExternalNetworkId::Ethereum => vec![2],
+      ExternalNetworkId::Monero => vec![3],
    }
  }
 }

-pub const NETWORKS: [NetworkId; 4] =
-  [NetworkId::Serai, NetworkId::Bitcoin, NetworkId::Ethereum, NetworkId::Monero];
+impl Decode for ExternalNetworkId {
+  fn decode<I: scale::Input>(input: &mut I) -> Result<Self, scale::Error> {
+    let kind = input.read_byte()?;
+    match kind {
+      1 => Ok(Self::Bitcoin),
+      2 => Ok(Self::Ethereum),
+      3 => Ok(Self::Monero),
+      _ => Err(scale::Error::from("invalid format")),
+    }
+  }
+}

-pub const COINS: [Coin; 5] = [Coin::Serai, Coin::Bitcoin, Coin::Ether, Coin::Dai, Coin::Monero];
+impl MaxEncodedLen for ExternalNetworkId {
+  fn max_encoded_len() -> usize {
+    1
+  }
+}

-/// The type used to identify coins.
-#[derive(
-  Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Encode, Decode, MaxEncodedLen, TypeInfo,
-)]
+impl EncodeLike for ExternalNetworkId {}
+
+#[cfg(feature = "borsh")]
+impl BorshSerialize for ExternalNetworkId {
+  fn serialize<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+    writer.write_all(&self.encode())
+  }
+}
+
+#[cfg(feature = "borsh")]
+impl BorshDeserialize for ExternalNetworkId {
+  fn deserialize_reader<R: std::io::Read>(reader: &mut R) -> std::io::Result<Self> {
+    let mut kind = [0; 1];
+    reader.read_exact(&mut kind)?;
+    ExternalNetworkId::decode(&mut kind.as_slice())
+      .map_err(|_| std::io::Error::other("invalid format"))
+  }
+}
+
+/// The type used to identify networks.
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, PartialOrd, Ord, TypeInfo)]
 #[cfg_attr(feature = "std", derive(Zeroize))]
-#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub enum Coin {
+pub enum NetworkId {
  Serai,
+  External(ExternalNetworkId),
+}
+
+impl Encode for NetworkId {
+  fn encode(&self) -> Vec<u8> {
+    match self {
+      NetworkId::Serai => vec![0],
+      NetworkId::External(network) => network.encode(),
+    }
+  }
+}
+
+impl Decode for NetworkId {
+  fn decode<I: scale::Input>(input: &mut I) -> Result<Self, scale::Error> {
+    let kind = input.read_byte()?;
+    match kind {
+      0 => Ok(Self::Serai),
+      _ => Ok(ExternalNetworkId::decode(&mut [kind].as_slice())?.into()),
+    }
+  }
+}
+
+impl MaxEncodedLen for NetworkId {
+  fn max_encoded_len() -> usize {
+    1
+  }
+}
+
+impl EncodeLike for NetworkId {}
+
+#[cfg(feature = "borsh")]
+impl BorshSerialize for NetworkId {
+  fn serialize<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+    writer.write_all(&self.encode())
+  }
+}
+
+#[cfg(feature = "borsh")]
+impl BorshDeserialize for NetworkId {
+  fn deserialize_reader<R: std::io::Read>(reader: &mut R) -> std::io::Result<Self> {
+    let mut kind = [0; 1];
+    reader.read_exact(&mut kind)?;
+    NetworkId::decode(&mut kind.as_slice()).map_err(|_| std::io::Error::other("invalid format"))
+  }
+}
+
+impl ExternalNetworkId {
+  pub fn coins(&self) -> Vec<ExternalCoin> {
+    match self {
+      Self::Bitcoin => vec![ExternalCoin::Bitcoin],
+      Self::Ethereum => vec![ExternalCoin::Ether, ExternalCoin::Dai],
+      Self::Monero => vec![ExternalCoin::Monero],
+    }
+  }
+}
+
+impl NetworkId {
+  pub fn coins(&self) -> Vec<Coin> {
+    match self {
+      Self::Serai => vec![Coin::Serai],
+      Self::External(network) => {
+        network.coins().into_iter().map(core::convert::Into::into).collect()
+      }
+    }
+  }
+}
+
+impl From<ExternalNetworkId> for NetworkId {
+  fn from(network: ExternalNetworkId) -> Self {
+    NetworkId::External(network)
+  }
+}
+
+impl TryFrom<NetworkId> for ExternalNetworkId {
+  type Error = ();
+
+  fn try_from(network: NetworkId) -> Result<Self, Self::Error> {
+    match network {
+      NetworkId::Serai => Err(())?,
+      NetworkId::External(n) => Ok(n),
+    }
+  }
+}
+
+pub const EXTERNAL_NETWORKS: [ExternalNetworkId; 3] =
+  [ExternalNetworkId::Bitcoin, ExternalNetworkId::Ethereum, ExternalNetworkId::Monero];
+
+pub const NETWORKS: [NetworkId; 4] = [
+  NetworkId::Serai,
+  NetworkId::External(ExternalNetworkId::Bitcoin),
+  NetworkId::External(ExternalNetworkId::Ethereum),
+  NetworkId::External(ExternalNetworkId::Monero),
+];
+
+pub const EXTERNAL_COINS: [ExternalCoin; 4] =
+  [ExternalCoin::Bitcoin, ExternalCoin::Ether, ExternalCoin::Dai, ExternalCoin::Monero];
+
+pub const COINS: [Coin; 5] = [
+  Coin::Serai,
+  Coin::External(ExternalCoin::Bitcoin),
+  Coin::External(ExternalCoin::Ether),
+  Coin::External(ExternalCoin::Dai),
+  Coin::External(ExternalCoin::Monero),
+];
+
+/// The type used to identify external coins.
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, TypeInfo)]
+#[cfg_attr(feature = "std", derive(Zeroize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum ExternalCoin {
  Bitcoin,
  Ether,
  Dai,
  Monero,
 }

+impl Encode for ExternalCoin {
+  fn encode(&self) -> Vec<u8> {
+    match self {
+      ExternalCoin::Bitcoin => vec![4],
+      ExternalCoin::Ether => vec![5],
+      ExternalCoin::Dai => vec![6],
+      ExternalCoin::Monero => vec![7],
+    }
+  }
+}
+
+impl Decode for ExternalCoin {
+  fn decode<I: scale::Input>(input: &mut I) -> Result<Self, scale::Error> {
+    let kind = input.read_byte()?;
+    match kind {
+      4 => Ok(Self::Bitcoin),
+      5 => Ok(Self::Ether),
+      6 => Ok(Self::Dai),
+      7 => Ok(Self::Monero),
+      _ => Err(scale::Error::from("invalid format")),
+    }
+  }
+}
+impl MaxEncodedLen for ExternalCoin {
+  fn max_encoded_len() -> usize {
+    1
+  }
+}
+
+impl EncodeLike for ExternalCoin {}
+
+#[cfg(feature = "borsh")]
+impl BorshSerialize for ExternalCoin {
+  fn serialize<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+    writer.write_all(&self.encode())
+  }
+}
+
+#[cfg(feature = "borsh")]
+impl BorshDeserialize for ExternalCoin {
+  fn deserialize_reader<R: std::io::Read>(reader: &mut R) -> std::io::Result<Self> {
+    let mut kind = [0; 1];
+    reader.read_exact(&mut kind)?;
+    ExternalCoin::decode(&mut kind.as_slice()).map_err(|_| std::io::Error::other("invalid format"))
+  }
+}
+
+/// The type used to identify coins.
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, TypeInfo)]
+#[cfg_attr(feature = "std", derive(Zeroize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum Coin {
+  Serai,
+  External(ExternalCoin),
+}
+
+impl Encode for Coin {
+  fn encode(&self) -> Vec<u8> {
+    match self {
+      Coin::Serai => vec![0],
+      Coin::External(ec) => ec.encode(),
+    }
+  }
+}
+
+impl Decode for Coin {
+  fn decode<I: scale::Input>(input: &mut I) -> Result<Self, scale::Error> {
+    let kind = input.read_byte()?;
+    match kind {
+      0 => Ok(Self::Serai),
+      _ => Ok(ExternalCoin::decode(&mut [kind].as_slice())?.into()),
+    }
+  }
+}
+
+impl MaxEncodedLen for Coin {
+  fn max_encoded_len() -> usize {
+    1
+  }
+}
+
+impl EncodeLike for Coin {}
+
+#[cfg(feature = "borsh")]
+impl BorshSerialize for Coin {
+  fn serialize<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+    writer.write_all(&self.encode())
+  }
+}
+
+#[cfg(feature = "borsh")]
+impl BorshDeserialize for Coin {
+  fn deserialize_reader<R: std::io::Read>(reader: &mut R) -> std::io::Result<Self> {
+    let mut kind = [0; 1];
+    reader.read_exact(&mut kind)?;
+    Coin::decode(&mut kind.as_slice()).map_err(|_| std::io::Error::other("invalid format"))
+  }
+}
+
+impl From<ExternalCoin> for Coin {
+  fn from(coin: ExternalCoin) -> Self {
+    Coin::External(coin)
+  }
+}
+
+impl TryFrom<Coin> for ExternalCoin {
+  type Error = ();
+
+  fn try_from(coin: Coin) -> Result<Self, Self::Error> {
+    match coin {
+      Coin::Serai => Err(())?,
+      Coin::External(c) => Ok(c),
+    }
+  }
+}
+
+impl ExternalCoin {
+  pub fn network(&self) -> ExternalNetworkId {
+    match self {
+      ExternalCoin::Bitcoin => ExternalNetworkId::Bitcoin,
+      ExternalCoin::Ether | ExternalCoin::Dai => ExternalNetworkId::Ethereum,
+      ExternalCoin::Monero => ExternalNetworkId::Monero,
+    }
+  }
+
+  pub fn name(&self) -> &'static str {
+    match self {
+      ExternalCoin::Bitcoin => "Bitcoin",
+      ExternalCoin::Ether => "Ether",
+      ExternalCoin::Dai => "Dai Stablecoin",
+      ExternalCoin::Monero => "Monero",
+    }
+  }
+
+  pub fn symbol(&self) -> &'static str {
+    match self {
+      ExternalCoin::Bitcoin => "BTC",
+      ExternalCoin::Ether => "ETH",
+      ExternalCoin::Dai => "DAI",
+      ExternalCoin::Monero => "XMR",
+    }
+  }
+
+  pub fn decimals(&self) -> u32 {
+    match self {
+      // Ether and DAI have 18 decimals, yet we only track 8 in order to fit them within u64s
+      ExternalCoin::Bitcoin | ExternalCoin::Ether | ExternalCoin::Dai => 8,
+      ExternalCoin::Monero => 12,
+    }
+  }
+}
+
 impl Coin {
  pub fn native() -> Coin {
    Coin::Serai
@@ -66,37 +354,28 @@ impl Coin {
  pub fn network(&self) -> NetworkId {
    match self {
      Coin::Serai => NetworkId::Serai,
-      Coin::Bitcoin => NetworkId::Bitcoin,
-      Coin::Ether | Coin::Dai => NetworkId::Ethereum,
-      Coin::Monero => NetworkId::Monero,
+      Coin::External(c) => c.network().into(),
    }
  }

  pub fn name(&self) -> &'static str {
    match self {
      Coin::Serai => "Serai",
-      Coin::Bitcoin => "Bitcoin",
-      Coin::Ether => "Ether",
-      Coin::Dai => "Dai Stablecoin",
-      Coin::Monero => "Monero",
+      Coin::External(c) => c.name(),
    }
  }

  pub fn symbol(&self) -> &'static str {
    match self {
      Coin::Serai => "SRI",
-      Coin::Bitcoin => "BTC",
-      Coin::Ether => "ETH",
-      Coin::Dai => "DAI",
-      Coin::Monero => "XMR",
+      Coin::External(c) => c.symbol(),
    }
  }

  pub fn decimals(&self) -> u32 {
    match self {
-      // Ether and DAI have 18 decimals, yet we only track 8 in order to fit them within u64s
-      Coin::Serai | Coin::Bitcoin | Coin::Ether | Coin::Dai => 8,
-      Coin::Monero => 12,
+      Coin::Serai => 8,
+      Coin::External(c) => c.decimals(),
    }
  }

--- a/substrate/runtime/src/lib.rs
+++ b/substrate/runtime/src/lib.rs
@@ -53,8 +53,9 @@ use sp_runtime::{

 #[allow(unused_imports)]
 use primitives::{
-  NetworkId, PublicKey, AccountLookup, SubstrateAmount, Coin, NETWORKS, MEDIAN_PRICE_WINDOW_LENGTH,
-  HOURS, DAYS, MINUTES, TARGET_BLOCK_TIME, BLOCK_SIZE, FAST_EPOCH_DURATION,
+  NetworkId, PublicKey, AccountLookup, SubstrateAmount, Coin, EXTERNAL_NETWORKS,
+  MEDIAN_PRICE_WINDOW_LENGTH, HOURS, DAYS, MINUTES, TARGET_BLOCK_TIME, BLOCK_SIZE,
+  FAST_EPOCH_DURATION,
 };

 use support::{
@@ -570,10 +571,7 @@ sp_api::impl_runtime_apis! {
        .map(|(id, _)| id.into_inner().0)
        .collect::<hashbrown::HashSet<_>>();
      let mut all = serai_validators;
-      for network in NETWORKS {
-        if network == NetworkId::Serai {
-          continue;
-        }
+      for network in EXTERNAL_NETWORKS {
        // Returning the latest-decided, not latest and active, means the active set
        // may fail to peer find if there isn't sufficient overlap. If a large amount reboot,
        // forcing some validators to successfully peer find in order for the threshold to become
@@ -581,7 +579,7 @@ sp_api::impl_runtime_apis! {
        //
        // This is assumed not to matter in real life, yet an interesting note.
        let participants =
-          ValidatorSets::participants_for_latest_decided_set(network)
+          ValidatorSets::participants_for_latest_decided_set(NetworkId::from(network))
            .map_or(vec![], BoundedVec::into_inner);
        for (participant, _) in participants {
          all.insert(participant.0);
@@ -610,25 +608,25 @@ sp_api::impl_runtime_apis! {

  impl dex::DexApi<Block> for Runtime {
    fn quote_price_exact_tokens_for_tokens(
-      asset1: Coin,
-      asset2: Coin,
+      coin1: Coin,
+      coin2: Coin,
      amount: SubstrateAmount,
      include_fee: bool
    ) -> Option<SubstrateAmount> {
-      Dex::quote_price_exact_tokens_for_tokens(asset1, asset2, amount, include_fee)
+      Dex::quote_price_exact_tokens_for_tokens(coin1, coin2, amount, include_fee)
    }

    fn quote_price_tokens_for_exact_tokens(
-      asset1: Coin,
-      asset2: Coin,
+      coin1: Coin,
+      coin2: Coin,
      amount: SubstrateAmount,
      include_fee: bool
    ) -> Option<SubstrateAmount> {
-      Dex::quote_price_tokens_for_exact_tokens(asset1, asset2, amount, include_fee)
+      Dex::quote_price_tokens_for_exact_tokens(coin1, coin2, amount, include_fee)
    }

-    fn get_reserves(asset1: Coin, asset2: Coin) -> Option<(SubstrateAmount, SubstrateAmount)> {
-      Dex::get_reserves(&asset1, &asset2).ok()
+    fn get_reserves(coin1: Coin, coin2: Coin) -> Option<(SubstrateAmount, SubstrateAmount)> {
+      Dex::get_reserves(&coin1, &coin2).ok()
    }
  }
 }
--- a/substrate/signals/primitives/src/lib.rs
+++ b/substrate/signals/primitives/src/lib.rs
@@ -5,7 +5,7 @@
 use scale::{Encode, Decode, MaxEncodedLen};
 use scale_info::TypeInfo;

-use serai_primitives::NetworkId;
+use serai_primitives::ExternalNetworkId;

 #[derive(Clone, Copy, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
 #[cfg_attr(feature = "std", derive(zeroize::Zeroize))]
@@ -13,5 +13,5 @@ use serai_primitives::NetworkId;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum SignalId {
  Retirement([u8; 32]),
-  Halt(NetworkId),
+  Halt(ExternalNetworkId),
 }
--- a/substrate/validator-sets/pallet/src/lib.rs
+++ b/substrate/validator-sets/pallet/src/lib.rs
@@ -316,11 +316,13 @@ pub mod pallet {
  /// The generated key pair for a given validator set instance.
  #[pallet::storage]
  #[pallet::getter(fn keys)]
-  pub type Keys<T: Config> = StorageMap<_, Twox64Concat, ValidatorSet, KeyPair, OptionQuery>;
+  pub type Keys<T: Config> =
+    StorageMap<_, Twox64Concat, ExternalValidatorSet, KeyPair, OptionQuery>;

  /// The key for validator sets which can (and still need to) publish their slash reports.
  #[pallet::storage]
-  pub type PendingSlashReport<T: Config> = StorageMap<_, Identity, NetworkId, Public, OptionQuery>;
+  pub type PendingSlashReport<T: Config> =
+    StorageMap<_, Identity, ExternalNetworkId, Public, OptionQuery>;

  /// Disabled validators.
  #[pallet::storage]
@@ -343,7 +345,7 @@ pub mod pallet {
      removed: T::AccountId,
    },
    KeyGen {
-      set: ValidatorSet,
+      set: ExternalValidatorSet,
      key_pair: KeyPair,
    },
    AcceptedHandover {
@@ -600,14 +602,16 @@ pub mod pallet {
      amount: Amount,
    ) -> Result<bool, DispatchError> {
      // Check it's safe to decrease this set's stake by this amount
-      let new_total_staked = Self::total_allocated_stake(network)
-        .unwrap()
-        .0
-        .checked_sub(amount.0)
-        .ok_or(Error::<T>::NotEnoughAllocated)?;
-      let required_stake = Self::required_stake_for_network(network);
-      if new_total_staked < required_stake {
-        Err(Error::<T>::DeallocationWouldRemoveEconomicSecurity)?;
+      if let NetworkId::External(n) = network {
+        let new_total_staked = Self::total_allocated_stake(NetworkId::from(n))
+          .unwrap()
+          .0
+          .checked_sub(amount.0)
+          .ok_or(Error::<T>::NotEnoughAllocated)?;
+        let required_stake = Self::required_stake_for_network(n);
+        if new_total_staked < required_stake {
+          Err(Error::<T>::DeallocationWouldRemoveEconomicSecurity)?;
+        }
      }

      let old_allocation =
@@ -690,20 +694,23 @@ pub mod pallet {
        return false;
      }

-      // Handover is automatically complete for Serai as it doesn't have a handover protocol
-      if network == NetworkId::Serai {
+      let NetworkId::External(n) = network else {
+        // Handover is automatically complete for Serai as it doesn't have a handover protocol
        return true;
-      }
+      };

      // The current session must have set keys for its handover to be completed
-      if !Keys::<T>::contains_key(ValidatorSet { network, session }) {
+      if !Keys::<T>::contains_key(ExternalValidatorSet { network: n, session }) {
        return false;
      }

      // This must be the first session (which has set keys) OR the prior session must have been
      // retired (signified by its keys no longer being present)
      (session.0 == 0) ||
-        (!Keys::<T>::contains_key(ValidatorSet { network, session: Session(session.0 - 1) }))
+        (!Keys::<T>::contains_key(ExternalValidatorSet {
+          network: n,
+          session: Session(session.0 - 1),
+        }))
    }

    fn new_session() {
@@ -733,19 +740,23 @@ pub mod pallet {
    // TODO: This is called retire_set, yet just starts retiring the set
    // Update the nomenclature within this function
    pub fn retire_set(set: ValidatorSet) {
-      // If the prior prior set didn't report, emit they're retired now
-      if PendingSlashReport::<T>::get(set.network).is_some() {
-        Self::deposit_event(Event::SetRetired {
-          set: ValidatorSet { network: set.network, session: Session(set.session.0 - 1) },
-        });
-      }
-
      // Serai doesn't set keys and network slashes are handled by BABE/GRANDPA
-      if set.network != NetworkId::Serai {
+      if let NetworkId::External(n) = set.network {
+        // If the prior prior set didn't report, emit they're retired now
+        if PendingSlashReport::<T>::get(n).is_some() {
+          Self::deposit_event(Event::SetRetired {
+            set: ValidatorSet { network: set.network, session: Session(set.session.0 - 1) },
+          });
+        }
+
        // This overwrites the prior value as the prior to-report set's stake presumably just
        // unlocked, making their report unenforceable
-        let keys = Keys::<T>::take(set).unwrap();
-        PendingSlashReport::<T>::set(set.network, Some(keys.0));
+        let keys =
+          Keys::<T>::take(ExternalValidatorSet { network: n, session: set.session }).unwrap();
+        PendingSlashReport::<T>::set(n, Some(keys.0));
+      } else {
+        // emit the event for serai network
+        Self::deposit_event(Event::SetRetired { set });
      }

      // We're retiring this set because the set after it accepted the handover
@@ -817,7 +828,7 @@ pub mod pallet {
    }

    /// Returns the required stake in terms SRI for a given `Balance`.
-    pub fn required_stake(balance: &Balance) -> SubstrateAmount {
+    pub fn required_stake(balance: &ExternalBalance) -> SubstrateAmount {
      use dex_pallet::HigherPrecisionBalance;

      // This is inclusive to an increase in accuracy
@@ -840,11 +851,11 @@ pub mod pallet {
    }

    /// Returns the current total required stake for a given `network`.
-    pub fn required_stake_for_network(network: NetworkId) -> SubstrateAmount {
+    pub fn required_stake_for_network(network: ExternalNetworkId) -> SubstrateAmount {
      let mut total_required = 0;
      for coin in network.coins() {
-        let supply = Coins::<T>::supply(coin);
-        total_required += Self::required_stake(&Balance { coin: *coin, amount: Amount(supply) });
+        let supply = Coins::<T>::supply(Coin::from(coin));
+        total_required += Self::required_stake(&ExternalBalance { coin, amount: Amount(supply) });
      }
      total_required
    }
@@ -940,7 +951,7 @@ pub mod pallet {
    #[pallet::weight(0)] // TODO
    pub fn set_keys(
      origin: OriginFor<T>,
-      network: NetworkId,
+      network: ExternalNetworkId,
      removed_participants: BoundedVec<Public, ConstU32<{ MAX_KEY_SHARES_PER_SET / 3 }>>,
      key_pair: KeyPair,
      signature: Signature,
@@ -951,8 +962,8 @@ pub mod pallet {
      // (called by pre_dispatch) checks it
      let _ = signature;

-      let session = Self::session(network).unwrap();
-      let set = ValidatorSet { network, session };
+      let session = Self::session(NetworkId::from(network)).unwrap();
+      let set = ExternalValidatorSet { network, session };

      Keys::<T>::set(set, Some(key_pair.clone()));

@@ -960,7 +971,7 @@ pub mod pallet {
      // We generally set TotalAllocatedStake when the prior set retires, and the new set is fully
      // active and liable. Since this is the first set, there is no prior set to wait to retire
      if session == Session(0) {
-        Self::set_total_allocated_stake(network);
+        Self::set_total_allocated_stake(NetworkId::from(network));
      }

      // This does not remove from TotalAllocatedStake or InSet in order to:
@@ -970,7 +981,7 @@ pub mod pallet {
      // 2) Not allow parties removed to immediately deallocate, per commentary on deallocation
      //    scheduling (https://github.com/serai-dex/serai/issues/394).
      for removed in removed_participants {
-        Self::deposit_event(Event::ParticipantRemoved { set, removed });
+        Self::deposit_event(Event::ParticipantRemoved { set: set.into(), removed });
      }
      Self::deposit_event(Event::KeyGen { set, key_pair });

@@ -981,7 +992,7 @@ pub mod pallet {
    #[pallet::weight(0)] // TODO
    pub fn report_slashes(
      origin: OriginFor<T>,
-      network: NetworkId,
+      network: ExternalNetworkId,
      slashes: BoundedVec<(Public, u32), ConstU32<{ MAX_KEY_SHARES_PER_SET / 3 }>>,
      signature: Signature,
    ) -> DispatchResult {
@@ -996,7 +1007,10 @@ pub mod pallet {

      // Emit set retireed
      Pallet::<T>::deposit_event(Event::SetRetired {
-        set: ValidatorSet { network, session: Session(Self::session(network).unwrap().0 - 1) },
+        set: ValidatorSet {
+          network: network.into(),
+          session: Session(Self::session(NetworkId::from(network)).unwrap().0 - 1),
+        },
      });

      Ok(())
@@ -1062,17 +1076,12 @@ pub mod pallet {
        Call::set_keys { network, ref removed_participants, ref key_pair, ref signature } => {
          let network = *network;

-          // Don't allow the Serai set to set_keys, as they have no reason to do so
-          if network == NetworkId::Serai {
-            Err(InvalidTransaction::Custom(0))?;
-          }
-
          // Confirm this set has a session
-          let Some(current_session) = Self::session(network) else {
+          let Some(current_session) = Self::session(NetworkId::from(network)) else {
            Err(InvalidTransaction::Custom(1))?
          };

-          let set = ValidatorSet { network, session: current_session };
+          let set = ExternalValidatorSet { network, session: current_session };

          // Confirm it has yet to set keys
          if Keys::<T>::get(set).is_some() {
@@ -1081,7 +1090,7 @@ pub mod pallet {

          // This is a needed precondition as this uses storage variables for the latest decided
          // session on this assumption
-          assert_eq!(Pallet::<T>::latest_decided_session(network), Some(current_session));
+          assert_eq!(Pallet::<T>::latest_decided_session(network.into()), Some(current_session));

          // This does not slash the removed participants as that'll be done at the end of the
          // set's lifetime
@@ -1094,15 +1103,15 @@ pub mod pallet {
            removed.insert(participant.0);
          }

-          let participants =
-            Participants::<T>::get(network).expect("session existed without participants");
+          let participants = Participants::<T>::get(NetworkId::from(network))
+            .expect("session existed without participants");

          let mut all_key_shares = 0;
          let mut signers = vec![];
          let mut signing_key_shares = 0;
          for participant in participants {
            let participant = participant.0;
-            let shares = InSet::<T>::get(network, participant)
+            let shares = InSet::<T>::get(NetworkId::from(network), participant)
              .expect("participant from Participants wasn't InSet");
            all_key_shares += shares;

@@ -1124,7 +1133,7 @@ pub mod pallet {
          // Verify the signature with the MuSig key of the signers
          // We theoretically don't need set_keys_message to bind to removed_participants, as the
          // key we're signing with effectively already does so, yet there's no reason not to
-          if !musig_key(set, &signers)
+          if !musig_key(set.into(), &signers)
            .verify(&set_keys_message(&set, removed_participants, key_pair), signature)
          {
            Err(InvalidTransaction::BadProof)?;
@@ -1138,17 +1147,16 @@ pub mod pallet {
        }
        Call::report_slashes { network, ref slashes, ref signature } => {
          let network = *network;
-          // Don't allow Serai to publish a slash report as BABE/GRANDPA handles slashes directly
-          if network == NetworkId::Serai {
-            Err(InvalidTransaction::Custom(0))?;
-          }
          let Some(key) = PendingSlashReport::<T>::take(network) else {
            // Assumed already published
            Err(InvalidTransaction::Stale)?
          };
+
          // There must have been a previous session is PendingSlashReport is populated
-          let set =
-            ValidatorSet { network, session: Session(Self::session(network).unwrap().0 - 1) };
+          let set = ExternalValidatorSet {
+            network,
+            session: Session(Self::session(NetworkId::from(network)).unwrap().0 - 1),
+          };
          if !key.verify(&report_slashes_message(&set, slashes), signature) {
            Err(InvalidTransaction::BadProof)?;
          }
@@ -1173,13 +1181,14 @@ pub mod pallet {
  }

  impl<T: Config> AllowMint for Pallet<T> {
-    fn is_allowed(balance: &Balance) -> bool {
+    fn is_allowed(balance: &ExternalBalance) -> bool {
      // get the required stake
      let current_required = Self::required_stake_for_network(balance.coin.network());
      let new_required = current_required + Self::required_stake(balance);

      // get the total stake for the network & compare.
-      let staked = Self::total_allocated_stake(balance.coin.network()).unwrap_or(Amount(0));
+      let staked =
+        Self::total_allocated_stake(NetworkId::from(balance.coin.network())).unwrap_or(Amount(0));
      staked.0 >= new_required
    }
  }
--- a/substrate/validator-sets/primitives/src/lib.rs
+++ b/substrate/validator-sets/primitives/src/lib.rs
@@ -17,7 +17,7 @@ use sp_core::{ConstU32, sr25519::Public, bounded::BoundedVec};
 #[cfg(not(feature = "std"))]
 use sp_std::vec::Vec;

-use serai_primitives::NetworkId;
+use serai_primitives::{ExternalNetworkId, NetworkId};

 /// The maximum amount of key shares per set.
 pub const MAX_KEY_SHARES_PER_SET: u32 = 150;
@@ -43,6 +43,33 @@ pub struct ValidatorSet {
  pub network: NetworkId,
 }

+/// The type used to identify a specific validator set during a specific session.
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, TypeInfo, MaxEncodedLen)]
+#[cfg_attr(feature = "std", derive(Zeroize))]
+#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct ExternalValidatorSet {
+  pub session: Session,
+  pub network: ExternalNetworkId,
+}
+
+impl From<ExternalValidatorSet> for ValidatorSet {
+  fn from(set: ExternalValidatorSet) -> Self {
+    ValidatorSet { session: set.session, network: set.network.into() }
+  }
+}
+
+impl TryFrom<ValidatorSet> for ExternalValidatorSet {
+  type Error = ();
+
+  fn try_from(set: ValidatorSet) -> Result<Self, Self::Error> {
+    match set.network {
+      NetworkId::Serai => Err(())?,
+      NetworkId::External(network) => Ok(ExternalValidatorSet { session: set.session, network }),
+    }
+  }
+}
+
 type MaxKeyLen = ConstU32<MAX_KEY_LEN>;
 /// The type representing a Key from an external network.
 pub type ExternalKey = BoundedVec<u8, MaxKeyLen>;
@@ -100,14 +127,14 @@ pub fn musig_key(set: ValidatorSet, set_keys: &[Public]) -> Public {

 /// The message for the set_keys signature.
 pub fn set_keys_message(
-  set: &ValidatorSet,
+  set: &ExternalValidatorSet,
  removed_participants: &[Public],
  key_pair: &KeyPair,
 ) -> Vec<u8> {
  (b"ValidatorSets-set_keys", set, removed_participants, key_pair).encode()
 }

-pub fn report_slashes_message(set: &ValidatorSet, slashes: &[(Public, u32)]) -> Vec<u8> {
+pub fn report_slashes_message(set: &ExternalValidatorSet, slashes: &[(Public, u32)]) -> Vec<u8> {
  (b"ValidatorSets-report_slashes", set, slashes).encode()
 }