operation file

examples/operation/BatchSendOperator.sol

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+pragma solidity 0.4.24;
+
+import { ERC777Token } from "../ERC777/ERC777Token.sol";
+
+// 批量操作
+contract BatchSendOperator {
+  /// @notice Send tokens to multiple recipients.
+  /// @param _recipients The addresses of the recipients
+  /// @param _amounts The numbers of tokens to be transferred
+  function batchSend(address _tokenContract, address[] _recipients, uint256[] _amounts, bytes _userData) external {
+    require(_recipients.length == _amounts.length, "The lengths of _recipients and _amounts should be the same.");
+
+    ERC777Token tokenContract = ERC777Token(_tokenContract);
+    for (uint256 i = 0; i < _recipients.length; i++) {
+      tokenContract.operatorSend(msg.sender, _recipients[i], _amounts[i], _userData, "");
+    }
+  }
+}

examples/operation/Coupon.sol

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+pragma solidity ^0.4.13;
+
+// 票卷所有權轉移
+contract Coupon {
+  // Configuration
+  uint256 public ID;
+  address public issuer;
+  address public owner;
+  uint256 public startTime;
+  uint256 public endTime;
+  uint256 public value;
+
+  // event
+  event ChangeOwnerToEvent(address new_owner);
+
+  // Functions with this modifier can only be executed by the owner
+  modifier onlyOwner(){
+      assert(owner == msg.sender);
+      _;
+  }
+
+  // Functions with this modifier can only be executed by the issuer
+  modifier onlyIssuer() {
+    assert(issuer == msg.sender);
+    _;
+  }
+
+  // Check whether the redeem time is between the span of startTime and endTime.
+  modifier isValidRedeemTime(){
+    require(startTime <= now);
+    require(endTime >= now);
+    _;
+  } 
+
+  // Constructor
+  function Coupon(uint256 id, uint256 _startTime, uint256 _endTime, uint256 _value, address _issuer) {
+    require(_endTime >= _startTime);
+
+    ID = id;
+    issuer =  _issuer;   // issuer is default to be the owner of the coupon
+    owner = _issuer;
+    startTime =  _startTime;
+    endTime =  _endTime;
+    value =  _value;
+  }
+
+  // receiver is the owner to be changed to 
+  function changeOwnerTo(address receiver) public onlyOwner {
+    owner = receiver;
+    ChangeOwnerToEvent(receiver);
+  }
+
+  // transfer the coupon ownership
+  function transfer(address receiver) public onlyOwner {
+    changeOwnerTo(receiver);
+  }
+}