diff --git a/packages/apps-config/src/api/chain/arcadia.ts b/packages/apps-config/src/api/chain/arcadia.ts
index 33c773ca3a..066edfd0ab 100644
--- a/packages/apps-config/src/api/chain/arcadia.ts
+++ b/packages/apps-config/src/api/chain/arcadia.ts
@@ -3,6 +3,28 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 export default {
-  // previous substrate versions
-  Weight: 'u32'
+  Amendment: 'Call',
+  Application: {
+    candidate: 'AccountId',
+    candidate_deposit: 'Balance',
+    challenged_block: 'BlockNumber',
+    challenger: 'Option<AccountId>',
+    challenger_deposit: 'Option<Balance>',
+    created_block: 'BlockNumber',
+    metadata: 'Vec<u8>',
+    voters_against: 'Vec<(AccountId, Balance)>',
+    voters_for: 'Vec<(AccountId, Balance)>',
+    votes_against: 'Option<Balance>',
+    votes_for: 'Option<Balance>'
+  },
+  CertificateId: 'AccountId',
+  RootCertificate: {
+    child_revocations: 'Vec<CertificateId>',
+    created: 'BlockNumber',
+    key: 'CertificateId',
+    owner: 'AccountId',
+    renewed: 'BlockNumber',
+    revoked: 'bool',
+    validity: 'BlockNumber'
+  }
 };