diff --git a/contracts/ProofMarketplace.sol b/contracts/ProofMarketplace.sol
index 99ad8cd..eb4eff1 100644
--- a/contracts/ProofMarketplace.sol
+++ b/contracts/ProofMarketplace.sol
@@ -166,7 +166,7 @@ contract ProofMarketplace is
 
     //-------------------------------- Events start --------------------------------//
 
-    event AskCreated(uint256 indexed askId, bool indexed hasPrivateInputs, bytes secret_data, bytes acl);
+    event AskCreated(uint256 indexed askId, bool indexed hasPrivateInputs, bytes secret_data, bytes acl, bytes extraData);
     event TaskCreated(uint256 indexed askId, address indexed generator, bytes new_acl);
     // TODO: add ask ID also
     event ProofCreated(uint256 indexed askId, bytes proof);
@@ -357,9 +357,10 @@ contract ProofMarketplace is
         // TODO: Check if this needs to be removed during review
         SecretType secretType,
         bytes calldata privateInputs,
-        bytes calldata acl
+        bytes calldata acl,
+        bytes calldata extraData
     ) external whenNotPaused nonReentrant {
-        _createAsk(ask, msg.sender, secretType, privateInputs, acl);
+        _createAsk(ask, msg.sender, secretType, privateInputs, acl, extraData);
     }
 
     function _createAsk(
@@ -367,7 +368,8 @@ contract ProofMarketplace is
         address payFrom,
         SecretType secretType,
         bytes calldata privateInputs,
-        bytes calldata acl
+        bytes calldata acl,
+        bytes calldata extraData
     ) internal {
         if (ask.reward == 0 || ask.proverData.length == 0) {
             revert Error.CannotBeZero();
@@ -407,10 +409,10 @@ contract ProofMarketplace is
 
         if (market.proverImageId.IS_ENCLAVE()) {
             // ACL is emitted if private
-            emit AskCreated(askId, true, privateInputs, acl);
+            emit AskCreated(askId, true, privateInputs, acl, extraData);
         } else {
             // ACL is not emitted if not private
-            emit AskCreated(askId, false, "", "");
+            emit AskCreated(askId, false, "", "", extraData);
         }
     }
 
diff --git a/contracts/verifierWrappers/plonk_vk_wrapper.sol b/contracts/verifierWrappers/plonk_vk_wrapper.sol
index 2c270c5..68b6b70 100644
--- a/contracts/verifierWrappers/plonk_vk_wrapper.sol
+++ b/contracts/verifierWrappers/plonk_vk_wrapper.sol
@@ -28,7 +28,8 @@ contract plonk_verifier_wrapper is SetPmp, IVerifier {
         ProofMarketplace.Ask calldata ask,
         ProofMarketplace.SecretType secretType,
         bytes calldata secret_inputs,
-        bytes calldata acl
+        bytes calldata acl,
+        bytes calldata extraData
     ) public {
         ProofMarketplace.Ask memory newAsk = ProofMarketplace.Ask(
             ask.marketId,
@@ -40,7 +41,7 @@ contract plonk_verifier_wrapper is SetPmp, IVerifier {
             encodeInputs(verifyAndDecodeInputs(ask.proverData))
         );
 
-        proofMarketplace.createAsk(newAsk, secretType, secret_inputs, acl);
+        proofMarketplace.createAsk(newAsk, secretType, secret_inputs, acl, extraData);
     }
 
     function verifyAndDecodeInputs(bytes calldata inputs) internal pure returns (bytes32[] memory) {
diff --git a/contracts/verifierWrappers/transfer_verifier_wrapper.sol b/contracts/verifierWrappers/transfer_verifier_wrapper.sol
index 18c4b00..dc2dbcc 100644
--- a/contracts/verifierWrappers/transfer_verifier_wrapper.sol
+++ b/contracts/verifierWrappers/transfer_verifier_wrapper.sol
@@ -31,7 +31,8 @@ contract transfer_verifier_wrapper is SetPmp, IVerifier {
         ProofMarketplace.Ask calldata ask,
         ProofMarketplace.SecretType secretType,
         bytes calldata secret_inputs,
-        bytes calldata acl
+        bytes calldata acl,
+        bytes calldata extraData
     ) public {
         ProofMarketplace.Ask memory newAsk = ProofMarketplace.Ask(
             ask.marketId,
@@ -43,7 +44,7 @@ contract transfer_verifier_wrapper is SetPmp, IVerifier {
             encodeInputs(verifyAndDecodeInputs(ask.proverData))
         );
 
-        proofMarketplace.createAsk(newAsk, secretType, abi.encode(secret_inputs), abi.encode(acl));
+        proofMarketplace.createAsk(newAsk, secretType, abi.encode(secret_inputs), abi.encode(acl), extraData);
     }
 
     function verifyAndDecodeInputs(bytes calldata inputs) internal pure returns (uint256[5] memory) {
diff --git a/contracts/verifierWrappers/xor2_verifier_wrapper.sol b/contracts/verifierWrappers/xor2_verifier_wrapper.sol
index 2b0c714..c22402b 100644
--- a/contracts/verifierWrappers/xor2_verifier_wrapper.sol
+++ b/contracts/verifierWrappers/xor2_verifier_wrapper.sol
@@ -25,7 +25,8 @@ contract xor2_verifier_wrapper is SetPmp, IVerifier {
         ProofMarketplace.Ask calldata ask,
         ProofMarketplace.SecretType secretType,
         bytes calldata secret_inputs,
-        bytes calldata acl
+        bytes calldata acl,
+        bytes calldata extraData
     ) public {
         ProofMarketplace.Ask memory newAsk = ProofMarketplace.Ask(
             ask.marketId,
@@ -37,7 +38,7 @@ contract xor2_verifier_wrapper is SetPmp, IVerifier {
             encodeInputs(verifyAndDecodeInputs(ask.proverData))
         );
 
-        proofMarketplace.createAsk(newAsk, secretType, abi.encode(secret_inputs), abi.encode(acl));
+        proofMarketplace.createAsk(newAsk, secretType, abi.encode(secret_inputs), abi.encode(acl), extraData);
     }
 
     function verifyAndDecodeInputs(bytes calldata inputs) internal pure returns (uint[1] memory) {
diff --git a/helpers/setup.ts b/helpers/setup.ts
index f772b32..bf89288 100644
--- a/helpers/setup.ts
+++ b/helpers/setup.ts
@@ -1,5 +1,5 @@
 import { ethers, upgrades } from "hardhat";
-import { Provider, Signer } from "ethers";
+import { BytesLike, Provider, Signer } from "ethers";
 
 import {
   MockToken,
@@ -46,13 +46,14 @@ export const createAsk = async (
   ask: ProofMarketplace.AskStruct,
   setupTemplate: SetupTemplate,
   secretType: number,
+  extraData: BytesLike = "0x",
 ): Promise<string> => {
   await setupTemplate.mockToken.connect(tokenHolder).transfer(await prover.getAddress(), ask.reward.toString());
 
   await setupTemplate.mockToken.connect(prover).approve(await setupTemplate.proofMarketplace.getAddress(), ask.reward.toString());
 
   const askId = await setupTemplate.proofMarketplace.askCounter();
-  await setupTemplate.proofMarketplace.connect(prover).createAsk(ask, secretType, "0x", "0x");
+  await setupTemplate.proofMarketplace.connect(prover).createAsk(ask, secretType, "0x", "0x", extraData);
 
   return askId.toString();
 };
diff --git a/test/Generator.ts b/test/Generator.ts
index 69438ed..eb130f5 100644
--- a/test/Generator.ts
+++ b/test/Generator.ts
@@ -381,7 +381,7 @@ describe("Checking Generator's multiple compute", () => {
 
         const askId = await proofMarketplace.askCounter();
 
-        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x");
+        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x", "0x");
 
         const matchingEngine: Signer = new ethers.Wallet(matchingEngineEnclave.getPrivateKey(true), admin.provider);
 
@@ -554,7 +554,7 @@ describe("Checking Generator's multiple compute", () => {
 
         const askId = await proofMarketplace.askCounter();
 
-        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x");
+        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x", "0x");
 
         const matchingEngine: Signer = new ethers.Wallet(matchingEngineEnclave.getPrivateKey(true), admin.provider);
 
@@ -646,7 +646,7 @@ describe("Checking Generator's multiple compute", () => {
 
         const askId = await proofMarketplace.askCounter();
 
-        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x");
+        await proofMarketplace.connect(prover).createAsk(ask, marketId, "0x", "0x", "0x");
 
         const matchingEngine: Signer = new ethers.Wallet(matchingEngineEnclave.getPrivateKey(true), admin.provider);
 
diff --git a/test/ProofMarketPlaceBasic.ts b/test/ProofMarketPlaceBasic.ts
index 1e9e306..6e995b6 100644
--- a/test/ProofMarketPlaceBasic.ts
+++ b/test/ProofMarketPlaceBasic.ts
@@ -364,9 +364,9 @@ describe("Proof market place", () => {
         .connect(prover)
         .approve(await proofMarketplace.getAddress(), new BigNumber(platformFee.toString()).plus(reward).toFixed());
 
-      await expect(proofMarketplace.connect(prover).createAsk(askRequest, 1, secretInfo, aclInfo))
+      await expect(proofMarketplace.connect(prover).createAsk(askRequest, 1, secretInfo, aclInfo, "0x"))
         .to.emit(proofMarketplace, "AskCreated")
-        .withArgs(askIdToBeGenerated, true, "0x2345", "0x21")
+        .withArgs(askIdToBeGenerated, true, "0x2345", "0x21", "0x")
         .to.emit(mockToken, "Transfer")
         .withArgs(await prover.getAddress(), await proofMarketplace.getAddress(), new BigNumber(platformFee.toString()).plus(reward));
 
@@ -435,9 +435,9 @@ describe("Proof market place", () => {
         .connect(prover)
         .approve(await proofMarketplace.getAddress(), new BigNumber(platformFee.toString()).plus(reward).toFixed());
 
-      await expect(proofMarketplace.connect(prover).createAsk(askRequest, 1, secretInfo, aclInfo))
+      await expect(proofMarketplace.connect(prover).createAsk(askRequest, 1, secretInfo, aclInfo, "0x"))
         .to.emit(proofMarketplace, "AskCreated")
-        .withArgs(askIdToBeGenerated, false, "0x", "0x")
+        .withArgs(askIdToBeGenerated, false, "0x", "0x", "0x")
         .to.emit(mockToken, "Transfer")
         .withArgs(await prover.getAddress(), await proofMarketplace.getAddress(), new BigNumber(platformFee.toString()).plus(reward));
 
@@ -467,6 +467,7 @@ describe("Proof market place", () => {
           0,
           "0x",
           "0x",
+          "0x",
         ),
       ).to.be.revertedWithPanic(0x32); // 0x32 mean array out of bounds // market is not created
     });
@@ -751,6 +752,7 @@ describe("Proof market place", () => {
             0,
             "0x",
             "0x",
+            "0x",
           );
 
           await generatorRegistry
@@ -842,6 +844,7 @@ describe("Proof market place", () => {
             0,
             "0x",
             "0x",
+            "0x",
           );
 
           await expect(
diff --git a/test/ProofMarketPlaceForAttestationZkVerifier.ts b/test/ProofMarketPlaceForAttestationZkVerifier.ts
index f895c25..ca5ee38 100644
--- a/test/ProofMarketPlaceForAttestationZkVerifier.ts
+++ b/test/ProofMarketPlaceForAttestationZkVerifier.ts
@@ -85,6 +85,13 @@ describe("Proof Market Place for Attestation Verifier", () => {
 
   let inputBytes = attestation.attestation;
 
+  let extraData = Buffer.from(`Figure out some way to pass attestation in extra data, and only journal_bytes in public inputs.
+      Prover will then, fetch the attestation from the extra data, generate proof.
+      When submitProof() is called, prover_bytes, attestation_from_extra_data, and proof will be sent by user only.
+      Verification Contract needs to check the consistency here.
+      start looking from risc0_attestation_verifier_wrapper.sol#verify(bytes memory encodedData)
+    `);
+
   beforeEach(async () => {
     signers = await ethers.getSigners();
     admin = signers[0];
@@ -192,6 +199,7 @@ describe("Proof Market Place for Attestation Verifier", () => {
         entityKeyRegistry,
       },
       1,
+      extraData,
     );
 
     await setup.createTask(