diff --git a/solidity/contracts/lib/interfaces/izeto_encrypted.sol b/solidity/contracts/lib/interfaces/izeto_encrypted.sol
index c39a5ec..798e740 100644
--- a/solidity/contracts/lib/interfaces/izeto_encrypted.sol
+++ b/solidity/contracts/lib/interfaces/izeto_encrypted.sol
@@ -23,6 +23,7 @@ interface IZetoEncrypted is IZetoBase {
         uint256[] outputs,
         uint256 encryptionNonce,
         uint256[] encryptedValues,
-        address indexed submitter
+        address indexed submitter,
+        bytes data
     );
 }
diff --git a/solidity/contracts/zeto_anon_enc.sol b/solidity/contracts/zeto_anon_enc.sol
index f6a5506..fc6ae8d 100644
--- a/solidity/contracts/zeto_anon_enc.sol
+++ b/solidity/contracts/zeto_anon_enc.sol
@@ -67,7 +67,8 @@ contract Zeto_AnonEnc is IZetoEncrypted, ZetoBase, ZetoFungibleWithdraw, UUPSUpg
         uint256[2] memory outputs,
         uint256 encryptionNonce,
         uint256[4] memory encryptedValues,
-        Commonlib.Proof calldata proof
+        Commonlib.Proof calldata proof,
+        bytes calldata data
     ) public returns (bool) {
         require(
             validateTransactionProposal(inputs, outputs, proof),
@@ -112,7 +113,8 @@ contract Zeto_AnonEnc is IZetoEncrypted, ZetoBase, ZetoFungibleWithdraw, UUPSUpg
             outputArray,
             encryptionNonce,
             encryptedValuesArray,
-            msg.sender
+            msg.sender,
+            data
         );
         return true;
     }
diff --git a/solidity/contracts/zeto_anon_enc_nullifier.sol b/solidity/contracts/zeto_anon_enc_nullifier.sol
index 9b143ce..d262f08 100644
--- a/solidity/contracts/zeto_anon_enc_nullifier.sol
+++ b/solidity/contracts/zeto_anon_enc_nullifier.sol
@@ -78,7 +78,8 @@ contract Zeto_AnonEncNullifier is
         uint256 root,
         uint256 encryptionNonce,
         uint256[4] memory encryptedValues,
-        Commonlib.Proof calldata proof
+        Commonlib.Proof calldata proof,
+        bytes calldata data
     ) public returns (bool) {
         require(
             validateTransactionProposal(nullifiers, outputs, root),
@@ -127,7 +128,8 @@ contract Zeto_AnonEncNullifier is
             outputArray,
             encryptionNonce,
             encryptedValuesArray,
-            msg.sender
+            msg.sender,
+            data
         );
         return true;
     }
diff --git a/solidity/contracts/zeto_anon_enc_nullifier_kyc.sol b/solidity/contracts/zeto_anon_enc_nullifier_kyc.sol
index c85ed40..05bdb0c 100644
--- a/solidity/contracts/zeto_anon_enc_nullifier_kyc.sol
+++ b/solidity/contracts/zeto_anon_enc_nullifier_kyc.sol
@@ -83,7 +83,8 @@ contract Zeto_AnonEncNullifierKyc is
         uint256 root,
         uint256 encryptionNonce,
         uint256[4] memory encryptedValues,
-        Commonlib.Proof calldata proof
+        Commonlib.Proof calldata proof,
+        bytes calldata data
     ) public returns (bool) {
         require(
             validateTransactionProposal(nullifiers, outputs, root),
@@ -133,7 +134,8 @@ contract Zeto_AnonEncNullifierKyc is
             outputArray,
             encryptionNonce,
             encryptedValuesArray,
-            msg.sender
+            msg.sender,
+            data
         );
         return true;
     }
diff --git a/solidity/test/zeto_anon_enc.ts b/solidity/test/zeto_anon_enc.ts
index 11236fd..b2e6e1f 100644
--- a/solidity/test/zeto_anon_enc.ts
+++ b/solidity/test/zeto_anon_enc.ts
@@ -261,7 +261,16 @@ describe("Zeto based fungible token with anonymity and encryption", function ()
     encryptionNonce: BigNumberish,
     encodedProof: any
   ) {
-    const tx = await zeto.connect(signer.signer).transfer(inputCommitments, outputCommitments, encryptionNonce, encryptedValues, encodedProof);
+    const tx = await zeto
+      .connect(signer.signer)
+      .transfer(
+        inputCommitments,
+        outputCommitments,
+        encryptionNonce,
+        encryptedValues,
+        encodedProof,
+        "0x"
+      );
     const results: ContractTransactionReceipt | null = await tx.wait();
 
     for (const input of inputCommitments) {
diff --git a/solidity/test/zeto_anon_enc_nullifier.ts b/solidity/test/zeto_anon_enc_nullifier.ts
index 6903498..de80627 100644
--- a/solidity/test/zeto_anon_enc_nullifier.ts
+++ b/solidity/test/zeto_anon_enc_nullifier.ts
@@ -417,7 +417,17 @@ describe("Zeto based fungible token with anonymity using nullifiers and encrypti
     encodedProof: any
   ) {
     const startTx = Date.now();
-    const tx = await zeto.connect(signer.signer).transfer(nullifiers, outputCommitments, root, encryptionNonce, encryptedValues, encodedProof);
+    const tx = await zeto
+      .connect(signer.signer)
+      .transfer(
+        nullifiers,
+        outputCommitments,
+        root,
+        encryptionNonce,
+        encryptedValues,
+        encodedProof,
+        "0x"
+      );
     const results: ContractTransactionReceipt | null = await tx.wait();
     console.log(`Time to execute transaction: ${Date.now() - startTx}ms. Gas used: ${results?.gasUsed}`);
     return results;
diff --git a/solidity/test/zeto_anon_enc_nullifier_kyc.ts b/solidity/test/zeto_anon_enc_nullifier_kyc.ts
index 4791e23..509de0a 100644
--- a/solidity/test/zeto_anon_enc_nullifier_kyc.ts
+++ b/solidity/test/zeto_anon_enc_nullifier_kyc.ts
@@ -953,7 +953,8 @@ describe('Zeto based fungible token with anonymity using nullifiers and encrypti
         root,
         encryptionNonce,
         encryptedValues,
-        encodedProof
+        encodedProof,
+        "0x"
       );
     const results: ContractTransactionReceipt | null = await tx.wait();
     console.log(
diff --git a/solidity/test/zeto_anon_enc_nullifier_non_repudiation.ts b/solidity/test/zeto_anon_enc_nullifier_non_repudiation.ts
index c9a7fc7..4cceead 100644
--- a/solidity/test/zeto_anon_enc_nullifier_non_repudiation.ts
+++ b/solidity/test/zeto_anon_enc_nullifier_non_repudiation.ts
@@ -448,7 +448,18 @@ describe("Zeto based fungible token with anonymity using nullifiers and encrypti
     const startTx = Date.now();
     const encryptedValuesForReceiver = encryptedValues.slice(0, 4);
     const encryptedValuesForRegulator = encryptedValues.slice(4, 20);
-    const tx = await zeto.connect(signer.signer).transfer(nullifiers, outputCommitments, root, encryptionNonce, encryptedValuesForReceiver, encryptedValuesForRegulator, encodedProof);
+    const tx = await zeto
+      .connect(signer.signer)
+      .transfer(
+        nullifiers,
+        outputCommitments,
+        root,
+        encryptionNonce,
+        encryptedValuesForReceiver,
+        encryptedValuesForRegulator,
+        encodedProof,
+        "0x"
+      );
     const results: ContractTransactionReceipt | null = await tx.wait();
     console.log(`Time to execute transaction: ${Date.now() - startTx}ms. Gas used: ${results?.gasUsed}`);
     return results;