diff --git a/contracts/erc1155/contracts/src/ERC1155.sol b/contracts/erc1155/contracts/src/ERC1155.sol
index 2f1f9d4557..c4d6e38bf5 100644
--- a/contracts/erc1155/contracts/src/ERC1155.sol
+++ b/contracts/erc1155/contracts/src/ERC1155.sol
@@ -77,7 +77,14 @@ contract ERC1155 is
 
         // perform transfer
         if (isNonFungible(id)) {
-            require(nfOwners[id] == from);
+            require(
+                    value == 1,
+                    "AMOUNT_EQUAL_TO_ONE_REQUIRED"
+            );
+            require(
+                nfOwners[id] == from,
+                "NFT_NOT_OWNED_BY_FROM_ADDRESS"
+            );
             nfOwners[id] = to;
             // You could keep balance of NF type in base type id like so:
             // uint256 baseType = getNonFungibleBaseType(_id);
@@ -164,7 +171,7 @@ contract ERC1155 is
                 nfOwners[id] = to;
             } else {
                 balances[id][from] = safeSub(balances[id][from], value);
-                balances[id][to] = safeAdd(value, balances[id][to]);
+                balances[id][to] = safeAdd(balances[id][to], value);
             }
         }
         emit TransferBatch(msg.sender, from, to, ids, values);
diff --git a/contracts/erc1155/test/utils/erc1155_wrapper.ts b/contracts/erc1155/test/utils/erc1155_wrapper.ts
index a7409dba07..7f620ece02 100644
--- a/contracts/erc1155/test/utils/erc1155_wrapper.ts
+++ b/contracts/erc1155/test/utils/erc1155_wrapper.ts
@@ -33,12 +33,13 @@ export class Erc1155Wrapper {
         to: string,
         token: BigNumber,
         value: BigNumber,
-        callbackData: string = '0x',
-        delegatedSpender: string = '',
+        callbackData?: string,
+        delegatedSpender?: string,
     ): Promise<TransactionReceiptWithDecodedLogs> {
-        const spender = _.isEmpty(delegatedSpender) ? from : delegatedSpender;
+        const spender = _.isUndefined(delegatedSpender) ? from : delegatedSpender;
+        const callbackDataHex = _.isUndefined(callbackData) ? '0x' : callbackData;
         const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
-            await this._erc1155Contract.safeTransferFrom.sendTransactionAsync(from, to, token, value, callbackData, {
+            await this._erc1155Contract.safeTransferFrom.sendTransactionAsync(from, to, token, value, callbackDataHex, {
                 from: spender,
             }),
         );
@@ -49,17 +50,18 @@ export class Erc1155Wrapper {
         to: string,
         tokens: BigNumber[],
         values: BigNumber[],
-        callbackData: string = '0x',
-        delegatedSpender: string = '',
+        callbackData?: string,
+        delegatedSpender?: string,
     ): Promise<TransactionReceiptWithDecodedLogs> {
-        const spender = _.isEmpty(delegatedSpender) ? from : delegatedSpender;
+        const spender = _.isUndefined(delegatedSpender) ? from : delegatedSpender;
+        const callbackDataHex = _.isUndefined(callbackData) ? '0x' : callbackData;
         const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
             await this._erc1155Contract.safeBatchTransferFrom.sendTransactionAsync(
                 from,
                 to,
                 tokens,
                 values,
-                callbackData,
+                callbackDataHex,
                 { from: spender },
             ),
         );