diff --git a/src/contract/Contract.ts b/src/contract/Contract.ts
index 38ebbf7..0e3a604 100644
--- a/src/contract/Contract.ts
+++ b/src/contract/Contract.ts
@@ -17,6 +17,16 @@ export type BenchmarkStats = { gatewayCommunication: number; stateEvaluation: nu
 
 export type SigningFunction = (tx: Transaction) => Promise<void>;
 
+interface BundlrResponse {
+  id: string;
+  public: string;
+  signature: string;
+  block: number;
+}
+export interface BundleInteractionResponse {
+  bundlrResponse: BundlrResponse;
+  originalTxId: string;
+}
 /**
  * Interface describing state for all Evolve-compatible contracts.
  */
@@ -171,7 +181,7 @@ export interface Contract<State = unknown> extends Source {
       strict?: boolean;
       vrf?: boolean;
     }
-  ): Promise<any | null>;
+  ): Promise<BundleInteractionResponse | null>;
 
   /**
    * Returns the full call tree report the last
@@ -243,5 +253,5 @@ export interface Contract<State = unknown> extends Source {
    * and its transaction to be confirmed by the network.
    * @param newSrcTxId - result of the {@link save} method call.
    */
-  evolve(newSrcTxId: string, useBundler?: boolean): Promise<string | null>;
+  evolve(newSrcTxId: string, useBundler?: boolean): Promise<BundleInteractionResponse | string | null>;
 }
diff --git a/src/contract/HandlerBasedContract.ts b/src/contract/HandlerBasedContract.ts
index 5fb3a5f..ed7561a 100644
--- a/src/contract/HandlerBasedContract.ts
+++ b/src/contract/HandlerBasedContract.ts
@@ -31,7 +31,8 @@ import {
   SourceType,
   Tags,
   SourceImpl,
-  SourceData
+  SourceData,
+  BundleInteractionResponse
 } from '@warp';
 import { TransactionStatusResponse } from 'arweave/node/transactions';
 import { NetworkInfoInterface } from 'arweave/node/network';
@@ -239,7 +240,7 @@ export class HandlerBasedContract<State> implements Contract<State> {
       strict: false,
       vrf: false
     }
-  ): Promise<any | null> {
+  ): Promise<BundleInteractionResponse | null> {
     this.logger.info('Bundle interaction input', input);
     if (!this.signer) {
       throw new Error("Wallet not connected. Use 'connect' method first.");
@@ -758,7 +759,7 @@ export class HandlerBasedContract<State> implements Contract<State> {
     return this;
   }
 
-  async evolve(newSrcTxId: string, useBundler = false): Promise<string | null> {
+  async evolve(newSrcTxId: string, useBundler = false): Promise<string | BundleInteractionResponse | null> {
     if (useBundler) {
       return await this.bundleInteraction<any>({ function: 'evolve', value: newSrcTxId });
     } else {
diff --git a/tools/bundle.ts b/tools/bundle.ts
index a15c988..30876cf 100644
--- a/tools/bundle.ts
+++ b/tools/bundle.ts
@@ -1,6 +1,6 @@
 /* eslint-disable */
 import Arweave from 'arweave';
-import { LoggerFactory, WarpNodeFactory } from '../src';
+import {BundleInteractionResponse, LoggerFactory, WarpNodeFactory} from '../src';
 import { TsLogFactory } from '../src/logging/node/TsLogFactory';
 import path from 'path';
 import knex from 'knex';
@@ -34,7 +34,7 @@ async function main() {
     useNullAsDefault: true
   });
 
-  const warp = await WarpNodeFactory.knexCached(arweave, knexConfig);
+  const warp = await WarpNodeFactory.memCached(arweave);
 
   const wallet: JWKInterface = readJSON('.secrets/33F0QHcb22W7LwWR1iRC8Az1ntZG09XQ03YWuw2ABqA.json');
 
@@ -42,7 +42,7 @@ async function main() {
   const initialState = fs.readFileSync(path.join(__dirname, 'data/js/token-pst.json'), 'utf8');
 
   // case 1 - full deploy, js contract
-  const contractTxId = await warp.createContract.deploy(
+  const {contractTxId, srcTxId} = await warp.createContract.deploy(
     {
       wallet,
       initState: initialState,
@@ -52,6 +52,7 @@ async function main() {
   );
 
   logger.info('tx id:', contractTxId);
+  logger.info('src tx id:', srcTxId);
 
   // connecting to a given contract
   const token = warp
@@ -60,16 +61,18 @@ async function main() {
     // calling "writeInteraction" without connecting to a wallet first will cause a runtime error.
     .connect(wallet);
 
-  const result = await token.bundleInteraction<any>(
+  const result: BundleInteractionResponse = await token.bundleInteraction<any>(
     {
       function: 'vrf'
     },
     { vrf: true }
   );
 
-  const { state } = await token.readState();
+  console.log(result.bundlrResponse);
 
-  logger.info('State', state.vrf);
+  /*const { state } = await token.readState();
+
+  logger.info('State', state.vrf);*/
 
   /*const result = await token.writeInteraction({
     function: "transfer",