diff --git a/examples/interop/common/mainchain_registration.ts b/examples/interop/common/mainchain_registration.ts
index 939757f5d1..bd91ed7483 100644
--- a/examples/interop/common/mainchain_registration.ts
+++ b/examples/interop/common/mainchain_registration.ts
@@ -3,9 +3,7 @@ import {
 	registrationSignatureMessageSchema,
 	mainchainRegParams as mainchainRegParamsSchema,
 	MESSAGE_TAG_CHAIN_REG,
-	MODULE_NAME_INTEROPERABILITY,
-} from 'lisk-framework';
-import { COMMAND_NAME_MAINCHAIN_REG } from 'lisk-framework/dist-node/modules/interoperability/constants';
+} from 'lisk-sdk';
 
 export const registerMainchain = async (
 	num: string,
@@ -17,6 +15,7 @@ export const registerMainchain = async (
 	const mainchainClient = await apiClient.createIPCClient(`~/.lisk/mainchain-node-${num}`);
 	const sidechainClient = await apiClient.createIPCClient(`~/.lisk/pos-sidechain-example-${num}`);
 
+	// Get node info from sidechain and mainchain
 	const mainchainNodeInfo = await mainchainClient.invoke('system_getNodeInfo');
 	const sidechainNodeInfo = await sidechainClient.invoke('system_getNodeInfo');
 
@@ -55,25 +54,29 @@ export const registerMainchain = async (
 		{ height: sidechainNodeInfo.height },
 	);
 
-	const activeValidatorsWithPrivateKey: { blsPublicKey: Buffer; blsPrivateKey: Buffer }[] = [];
+	// Add validator private keys to the sidechain validator list
+	const activeValidatorsBLSKeys: { blsPublicKey: Buffer; blsPrivateKey: Buffer }[] = [];
 	for (const v of sidechainActiveValidators as { blsKey: string; bftWeight: string }[]) {
 		const validatorInfo = sidechainValidatorsKeys.find(
 			configValidator => configValidator.plain.blsKey === v.blsKey,
 		);
 		if (validatorInfo) {
-			activeValidatorsWithPrivateKey.push({
+			activeValidatorsBLSKeys.push({
 				blsPublicKey: Buffer.from(v.blsKey, 'hex'),
 				blsPrivateKey: Buffer.from(validatorInfo.plain.blsPrivateKey, 'hex'),
 			});
 		}
 	}
-	console.log('Total activeValidatorsWithPrivateKey:', activeValidatorsWithPrivateKey.length);
-	// Sort active validators from sidechainChain
-	activeValidatorsWithPrivateKey.sort((a, b) => a.blsPublicKey.compare(b.blsPublicKey));
+
+	console.log('Total activeValidatorsBLSKeys:', activeValidatorsBLSKeys.length);
+
+	// Sort active validators from sidechain lexicographically after their BLS public key
+	activeValidatorsBLSKeys.sort((a, b) => a.blsPublicKey.compare(b.blsPublicKey));
 
 	const sidechainValidatorsSignatures: { publicKey: Buffer; signature: Buffer }[] = [];
-	// Sign with each active validator
-	for (const validator of activeValidatorsWithPrivateKey) {
+
+	// Sign parameters with each active sidechain validator
+	for (const validator of activeValidatorsBLSKeys) {
 		const signature = bls.signData(
 			MESSAGE_TAG_CHAIN_REG,
 			params.ownChainID,
@@ -83,7 +86,7 @@ export const registerMainchain = async (
 		sidechainValidatorsSignatures.push({ publicKey: validator.blsPublicKey, signature });
 	}
 
-	const publicKeysList = activeValidatorsWithPrivateKey.map(v => v.blsPublicKey);
+	const publicKeysList = activeValidatorsBLSKeys.map(v => v.blsPublicKey);
 	console.log('Total active sidechain validators:', sidechainValidatorsSignatures.length);
 
 	// Create an aggregated signature
@@ -102,8 +105,8 @@ export const registerMainchain = async (
 		aggregationBits: aggregationBits.toString('hex'),
 	};
 	const tx = new Transaction({
-		module: MODULE_NAME_INTEROPERABILITY,
-		command: COMMAND_NAME_MAINCHAIN_REG,
+		module: 'interoperability',
+		command: 'registerMainchain',
 		fee: BigInt(2000000000),
 		params: codec.encodeJSON(mainchainRegParamsSchema, mainchainRegParams),
 		nonce: BigInt(nonce),