diff --git a/bridges/bin/millau/node/src/chain_spec.rs b/bridges/bin/millau/node/src/chain_spec.rs
index fbfca8692f..ad424ba463 100644
--- a/bridges/bin/millau/node/src/chain_spec.rs
+++ b/bridges/bin/millau/node/src/chain_spec.rs
@@ -88,15 +88,7 @@ impl Alternative {
 					testnet_genesis(
 						vec![get_authority_keys_from_seed("Alice")],
 						get_account_id_from_seed::<sr25519::Public>("Alice"),
-						vec![
-							get_account_id_from_seed::<sr25519::Public>("Alice"),
-							get_account_id_from_seed::<sr25519::Public>("Bob"),
-							get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Alice"),
-							)),
-						],
+						endowed_accounts(),
 						true,
 					)
 				},
@@ -120,48 +112,7 @@ impl Alternative {
 							get_authority_keys_from_seed("Eve"),
 						],
 						get_account_id_from_seed::<sr25519::Public>("Alice"),
-						vec![
-							get_account_id_from_seed::<sr25519::Public>("Alice"),
-							get_account_id_from_seed::<sr25519::Public>("Bob"),
-							get_account_id_from_seed::<sr25519::Public>("Charlie"),
-							get_account_id_from_seed::<sr25519::Public>("Dave"),
-							get_account_id_from_seed::<sr25519::Public>("Eve"),
-							get_account_id_from_seed::<sr25519::Public>("Ferdie"),
-							get_account_id_from_seed::<sr25519::Public>("George"),
-							get_account_id_from_seed::<sr25519::Public>("Harry"),
-							get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
-							get_account_id_from_seed::<sr25519::Public>("George//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Harry//stash"),
-							get_account_id_from_seed::<sr25519::Public>("RialtoMessagesOwner"),
-							get_account_id_from_seed::<sr25519::Public>("WithRialtoTokenSwap"),
-							pallet_bridge_messages::relayer_fund_account_id::<
-								bp_millau::AccountId,
-								bp_millau::AccountIdConverter,
-							>(),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Alice"),
-							)),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Bob"),
-							)),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Charlie"),
-							)),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Dave"),
-							)),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Eve"),
-							)),
-							derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Ferdie"),
-							)),
-						],
+						endowed_accounts(),
 						true,
 					)
 				},
@@ -175,6 +126,55 @@ impl Alternative {
 	}
 }
 
+/// We're using the same set of endowed accounts on all Millau chains (dev/local) to make
+/// sure that all accounts, required for bridge to be functional (e.g. relayers fund account,
+/// accounts used by relayers in our test deployments, accounts used for demonstration
+/// purposes), are all available on these chains.
+fn endowed_accounts() -> Vec<AccountId> {
+	vec![
+		get_account_id_from_seed::<sr25519::Public>("Alice"),
+		get_account_id_from_seed::<sr25519::Public>("Bob"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie"),
+		get_account_id_from_seed::<sr25519::Public>("Dave"),
+		get_account_id_from_seed::<sr25519::Public>("Eve"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie"),
+		get_account_id_from_seed::<sr25519::Public>("George"),
+		get_account_id_from_seed::<sr25519::Public>("Harry"),
+		get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
+		get_account_id_from_seed::<sr25519::Public>("George//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Harry//stash"),
+		get_account_id_from_seed::<sr25519::Public>("RialtoMessagesOwner"),
+		get_account_id_from_seed::<sr25519::Public>("WithRialtoTokenSwap"),
+		pallet_bridge_messages::relayer_fund_account_id::<
+			bp_millau::AccountId,
+			bp_millau::AccountIdConverter,
+		>(),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Alice"),
+		)),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Bob"),
+		)),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Charlie"),
+		)),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Dave"),
+		)),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Eve"),
+		)),
+		derive_account_from_rialto_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Ferdie"),
+		)),
+	]
+}
+
 fn session_keys(aura: AuraId, beefy: BeefyId, grandpa: GrandpaId) -> SessionKeys {
 	SessionKeys { aura, beefy, grandpa }
 }
diff --git a/bridges/bin/rialto/node/src/chain_spec.rs b/bridges/bin/rialto/node/src/chain_spec.rs
index fb18a35a6a..527b5c051d 100644
--- a/bridges/bin/rialto/node/src/chain_spec.rs
+++ b/bridges/bin/rialto/node/src/chain_spec.rs
@@ -96,15 +96,7 @@ impl Alternative {
 					testnet_genesis(
 						vec![get_authority_keys_from_seed("Alice")],
 						get_account_id_from_seed::<sr25519::Public>("Alice"),
-						vec![
-							get_account_id_from_seed::<sr25519::Public>("Alice"),
-							get_account_id_from_seed::<sr25519::Public>("Bob"),
-							get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Bob"),
-							)),
-						],
+						endowed_accounts(),
 						true,
 					)
 				},
@@ -128,48 +120,7 @@ impl Alternative {
 							get_authority_keys_from_seed("Eve"),
 						],
 						get_account_id_from_seed::<sr25519::Public>("Alice"),
-						vec![
-							get_account_id_from_seed::<sr25519::Public>("Alice"),
-							get_account_id_from_seed::<sr25519::Public>("Bob"),
-							get_account_id_from_seed::<sr25519::Public>("Charlie"),
-							get_account_id_from_seed::<sr25519::Public>("Dave"),
-							get_account_id_from_seed::<sr25519::Public>("Eve"),
-							get_account_id_from_seed::<sr25519::Public>("Ferdie"),
-							get_account_id_from_seed::<sr25519::Public>("George"),
-							get_account_id_from_seed::<sr25519::Public>("Harry"),
-							get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
-							get_account_id_from_seed::<sr25519::Public>("George//stash"),
-							get_account_id_from_seed::<sr25519::Public>("Harry//stash"),
-							get_account_id_from_seed::<sr25519::Public>("MillauMessagesOwner"),
-							get_account_id_from_seed::<sr25519::Public>("WithMillauTokenSwap"),
-							pallet_bridge_messages::relayer_fund_account_id::<
-								bp_rialto::AccountId,
-								bp_rialto::AccountIdConverter,
-							>(),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Alice"),
-							)),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Bob"),
-							)),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Charlie"),
-							)),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Dave"),
-							)),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Eve"),
-							)),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
-								get_account_id_from_seed::<sr25519::Public>("Ferdie"),
-							)),
-						],
+						endowed_accounts(),
 						true,
 					)
 				},
@@ -183,6 +134,55 @@ impl Alternative {
 	}
 }
 
+/// We're using the same set of endowed accounts on all Millau chains (dev/local) to make
+/// sure that all accounts, required for bridge to be functional (e.g. relayers fund account,
+/// accounts used by relayers in our test deployments, accounts used for demonstration
+/// purposes), are all available on these chains.
+fn endowed_accounts() -> Vec<AccountId> {
+	vec![
+		get_account_id_from_seed::<sr25519::Public>("Alice"),
+		get_account_id_from_seed::<sr25519::Public>("Bob"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie"),
+		get_account_id_from_seed::<sr25519::Public>("Dave"),
+		get_account_id_from_seed::<sr25519::Public>("Eve"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie"),
+		get_account_id_from_seed::<sr25519::Public>("George"),
+		get_account_id_from_seed::<sr25519::Public>("Harry"),
+		get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
+		get_account_id_from_seed::<sr25519::Public>("George//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Harry//stash"),
+		get_account_id_from_seed::<sr25519::Public>("MillauMessagesOwner"),
+		get_account_id_from_seed::<sr25519::Public>("WithMillauTokenSwap"),
+		pallet_bridge_messages::relayer_fund_account_id::<
+			bp_rialto::AccountId,
+			bp_rialto::AccountIdConverter,
+		>(),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Alice"),
+		)),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Bob"),
+		)),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Charlie"),
+		)),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Dave"),
+		)),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Eve"),
+		)),
+		derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
+			get_account_id_from_seed::<sr25519::Public>("Ferdie"),
+		)),
+	]
+}
+
 fn session_keys(
 	babe: BabeId,
 	beefy: BeefyId,