Tether USD

Token

Overview[ERC-20]

Max Total Supply

73,812,341,693.01

USDT

Holders

7,909,168+0.09%

Transfers

324,247,780

Profile Summary

Contract

0xdac17f-831ec7

Decimals

Market

Price

$1 @0.00041704 ETH+0.05%

Volume (24H)

$35,967,459,096

Circulating Market Cap

$156,073,181,681

Contract Source Code Verified

Contract NameTetherToken

Compiler Versionv0.4.18+commit.9cf6e910

Optimization EnabledNo

Other SettingsDefault evmVersion

Contract Source Code (Solidity)

1
pragma solidity ^0.4.17;
2
 
3
/**
4
 * @title SafeMath
5
 * @dev Math operations with safety checks that throw on error
6
 */
7
library SafeMath {
8
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
9
        if (a == 0) {
10
            return 0;
11
        }
12
        uint256 c = a * b;
13
        assert(c / a == b);
14
        return c;
15
    }
16
 
17
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
18
        // assert(b > 0); // Solidity automatically throws when dividing by 0
19
        uint256 c = a / b;
20
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
21
        return c;
22
    }
23
 
24
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
25
        assert(b <= a);
26
        return a - b;
27
    }
28
 
29
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
30
        uint256 c = a + b;
31
        assert(c >= a);
32
        return c;
33
    }
34
}
35
 
36
/**
37
 * @title Ownable
38
 * @dev The Ownable contract has an owner address, and provides basic authorization control
39
 * functions, this simplifies the implementation of "user permissions".
40
 */
41
contract Ownable {
42
    address public owner;
43
 
44
    /**
45
      * @dev The Ownable constructor sets the original `owner` of the contract to the sender
46
      * account.
47
      */
48
    function Ownable() public {
49
        owner = msg.sender;
50
    }
51
 
52
    /**
53
      * @dev Throws if called by any account other than the owner.
54
      */
55
    modifier onlyOwner() {
56
        require(msg.sender == owner);
57
        _;
58
    }
59
 
60
    /**
61
    * @dev Allows the current owner to transfer control of the contract to a newOwner.
62
    * @param newOwner The address to transfer ownership to.
63
    */
64
    function transferOwnership(address newOwner) public onlyOwner {
65
        if (newOwner != address(0)) {
66
            owner = newOwner;
67
        }
68
    }
69
 
70
}
71
 
72
/**
73
 * @title ERC20Basic
74
 * @dev Simpler version of ERC20 interface
75
 * @dev see https://github.com/ethereum/EIPs/issues/20
76
 */
77
contract ERC20Basic {
78
    uint public _totalSupply;
79
    function totalSupply() public constant returns (uint);
80
    function balanceOf(address who) public constant returns (uint);
81
    function transfer(address to, uint value) public;
82
    event Transfer(address indexed from, address indexed to, uint value);
83
}
84
 
85
/**
86
 * @title ERC20 interface
87
 * @dev see https://github.com/ethereum/EIPs/issues/20
88
 */
89
contract ERC20 is ERC20Basic {
90
    function allowance(address owner, address spender) public constant returns (uint);
91
    function transferFrom(address from, address to, uint value) public;
92
    function approve(address spender, uint value) public;
93
    event Approval(address indexed owner, address indexed spender, uint value);
94
}
95
 
96
/**
97
 * @title Basic token
98
 * @dev Basic version of StandardToken, with no allowances.
99
 */
100
contract BasicToken is Ownable, ERC20Basic {
101
    using SafeMath for uint;
102
 
103
    mapping(address => uint) public balances;
104
 
105
    // additional variables for use if transaction fees ever became necessary
106
    uint public basisPointsRate = 0;
107
    uint public maximumFee = 0;
108
 
109
    /**
110
    * @dev Fix for the ERC20 short address attack.
111
    */
112
    modifier onlyPayloadSize(uint size) {
113
        require(!(msg.data.length < size + 4));
114
        _;
115
    }
116
 
117
    /**
118
    * @dev transfer token for a specified address
119
    * @param _to The address to transfer to.
120
    * @param _value The amount to be transferred.
121
    */
122
    function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {
123
        uint fee = (_value.mul(basisPointsRate)).div(10000);
124
        if (fee > maximumFee) {
125
            fee = maximumFee;
126
        }
127
        uint sendAmount = _value.sub(fee);
128
        balances[msg.sender] = balances[msg.sender].sub(_value);
129
        balances[_to] = balances[_to].add(sendAmount);
130
        if (fee > 0) {
131
            balances[owner] = balances[owner].add(fee);
132
            Transfer(msg.sender, owner, fee);
133
        }
134
        Transfer(msg.sender, _to, sendAmount);
135
    }
136
 
137
    /**
138
    * @dev Gets the balance of the specified address.
139
    * @param _owner The address to query the the balance of.
140
    * @return An uint representing the amount owned by the passed address.
141
    */
142
    function balanceOf(address _owner) public constant returns (uint balance) {
143
        return balances[_owner];
144
    }
145
 
146
}
147
 
148
/**
149
 * @title Standard ERC20 token
150
 *
151
 * @dev Implementation of the basic standard token.
152
 * @dev https://github.com/ethereum/EIPs/issues/20
153
 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
154
 */
155
contract StandardToken is BasicToken, ERC20 {
156
 
157
    mapping (address => mapping (address => uint)) public allowed;
158
 
159
    uint public constant MAX_UINT = 2**256 - 1;
160
 
161
    /**
162
    * @dev Transfer tokens from one address to another
163
    * @param _from address The address which you want to send tokens from
164
    * @param _to address The address which you want to transfer to
165
    * @param _value uint the amount of tokens to be transferred
166
    */
167
    function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {
168
        var _allowance = allowed[_from][msg.sender];
169
 
170
        // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
171
        // if (_value > _allowance) throw;
172
 
173
        uint fee = (_value.mul(basisPointsRate)).div(10000);
174
        if (fee > maximumFee) {
175
            fee = maximumFee;
176
        }
177
        if (_allowance < MAX_UINT) {
178
            allowed[_from][msg.sender] = _allowance.sub(_value);
179
        }
180
        uint sendAmount = _value.sub(fee);
181
        balances[_from] = balances[_from].sub(_value);
182
        balances[_to] = balances[_to].add(sendAmount);
183
        if (fee > 0) {
184
            balances[owner] = balances[owner].add(fee);
185
            Transfer(_from, owner, fee);
186
        }
187
        Transfer(_from, _to, sendAmount);
188
    }
189
 
190
    /**
191
    * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
192
    * @param _spender The address which will spend the funds.
193
    * @param _value The amount of tokens to be spent.
194
    */
195
    function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
196
 
197
        // To change the approve amount you first have to reduce the addresses`
198
        //  allowance to zero by calling `approve(_spender, 0)` if it is not
199
        //  already 0 to mitigate the race condition described here:
200
        //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
201
        require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));
202
 
203
        allowed[msg.sender][_spender] = _value;
204
        Approval(msg.sender, _spender, _value);
205
    }
206
 
207
    /**
208
    * @dev Function to check the amount of tokens than an owner allowed to a spender.
209
    * @param _owner address The address which owns the funds.
210
    * @param _spender address The address which will spend the funds.
211
    * @return A uint specifying the amount of tokens still available for the spender.
212
    */
213
    function allowance(address _owner, address _spender) public constant returns (uint remaining) {
214
        return allowed[_owner][_spender];
215
    }
216
 
217
}
218
 
219
 
220
/**
221
 * @title Pausable
222
 * @dev Base contract which allows children to implement an emergency stop mechanism.
223
 */
224
contract Pausable is Ownable {
225
  event Pause();
226
  event Unpause();
227
 
228
  bool public paused = false;
229
 
230
 
231
  /**
232
   * @dev Modifier to make a function callable only when the contract is not paused.
233
   */
234
  modifier whenNotPaused() {
235
    require(!paused);
236
    _;
237
  }
238
 
239
  /**
240
   * @dev Modifier to make a function callable only when the contract is paused.
241
   */
242
  modifier whenPaused() {
243
    require(paused);
244
    _;
245
  }
246
 
247
  /**
248
   * @dev called by the owner to pause, triggers stopped state
249
   */
250
  function pause() onlyOwner whenNotPaused public {
251
    paused = true;
252
    Pause();
253
  }
254
 
255
  /**
256
   * @dev called by the owner to unpause, returns to normal state
257
   */
258
  function unpause() onlyOwner whenPaused public {
259
    paused = false;
260
    Unpause();
261
  }
262
}
263
 
264
contract BlackList is Ownable, BasicToken {
265
 
266
    /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) ///////
267
    function getBlackListStatus(address _maker) external constant returns (bool) {
268
        return isBlackListed[_maker];
269
    }
270
 
271
    function getOwner() external constant returns (address) {
272
        return owner;
273
    }
274
 
275
    mapping (address => bool) public isBlackListed;
276
    
277
    function addBlackList (address _evilUser) public onlyOwner {
278
        isBlackListed[_evilUser] = true;
279
        AddedBlackList(_evilUser);
280
    }
281
 
282
    function removeBlackList (address _clearedUser) public onlyOwner {
283
        isBlackListed[_clearedUser] = false;
284
        RemovedBlackList(_clearedUser);
285
    }
286
 
287
    function destroyBlackFunds (address _blackListedUser) public onlyOwner {
288
        require(isBlackListed[_blackListedUser]);
289
        uint dirtyFunds = balanceOf(_blackListedUser);
290
        balances[_blackListedUser] = 0;
291
        _totalSupply -= dirtyFunds;
292
        DestroyedBlackFunds(_blackListedUser, dirtyFunds);
293
    }
294
 
295
    event DestroyedBlackFunds(address _blackListedUser, uint _balance);
296
 
297
    event AddedBlackList(address _user);
298
 
299
    event RemovedBlackList(address _user);
300
 
301
}
302
 
303
contract UpgradedStandardToken is StandardToken{
304
    // those methods are called by the legacy contract
305
    // and they must ensure msg.sender to be the contract address
306
    function transferByLegacy(address from, address to, uint value) public;
307
    function transferFromByLegacy(address sender, address from, address spender, uint value) public;
308
    function approveByLegacy(address from, address spender, uint value) public;
309
}
310
 
311
contract TetherToken is Pausable, StandardToken, BlackList {
312
 
313
    string public name;
314
    string public symbol;
315
    uint public decimals;
316
    address public upgradedAddress;
317
    bool public deprecated;
318
 
319
    //  The contract can be initialized with a number of tokens
320
    //  All the tokens are deposited to the owner address
321
    //
322
    // @param _balance Initial supply of the contract
323
    // @param _name Token Name
324
    // @param _symbol Token symbol
325
    // @param _decimals Token decimals
326
    function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public {
327
        _totalSupply = _initialSupply;
328
        name = _name;
329
        symbol = _symbol;
330
        decimals = _decimals;
331
        balances[owner] = _initialSupply;
332
        deprecated = false;
333
    }
334
 
335
    // Forward ERC20 methods to upgraded contract if this one is deprecated
336
    function transfer(address _to, uint _value) public whenNotPaused {
337
        require(!isBlackListed[msg.sender]);
338
        if (deprecated) {
339
            return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value);
340
        } else {
341
            return super.transfer(_to, _value);
342
        }
343
    }
344
 
345
    // Forward ERC20 methods to upgraded contract if this one is deprecated
346
    function transferFrom(address _from, address _to, uint _value) public whenNotPaused {
347
        require(!isBlackListed[_from]);
348
        if (deprecated) {
349
            return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value);
350
        } else {
351
            return super.transferFrom(_from, _to, _value);
352
        }
353
    }
354
 
355
    // Forward ERC20 methods to upgraded contract if this one is deprecated
356
    function balanceOf(address who) public constant returns (uint) {
357
        if (deprecated) {
358
            return UpgradedStandardToken(upgradedAddress).balanceOf(who);
359
        } else {
360
            return super.balanceOf(who);
361
        }
362
    }
363
 
364
    // Forward ERC20 methods to upgraded contract if this one is deprecated
365
    function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
366
        if (deprecated) {
367
            return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value);
368
        } else {
369
            return super.approve(_spender, _value);
370
        }
371
    }
372
 
373
    // Forward ERC20 methods to upgraded contract if this one is deprecated
374
    function allowance(address _owner, address _spender) public constant returns (uint remaining) {
375
        if (deprecated) {
376
            return StandardToken(upgradedAddress).allowance(_owner, _spender);
377
        } else {
378
            return super.allowance(_owner, _spender);
379
        }
380
    }
381
 
382
    // deprecate current contract in favour of a new one
383
    function deprecate(address _upgradedAddress) public onlyOwner {
384
        deprecated = true;
385
        upgradedAddress = _upgradedAddress;
386
        Deprecate(_upgradedAddress);
387
    }
388
 
389
    // deprecate current contract if favour of a new one
390
    function totalSupply() public constant returns (uint) {
391
        if (deprecated) {
392
            return StandardToken(upgradedAddress).totalSupply();
393
        } else {
394
            return _totalSupply;
395
        }
396
    }
397
 
398
    // Issue a new amount of tokens
399
    // these tokens are deposited into the owner address
400
    //
401
    // @param _amount Number of tokens to be issued
402
    function issue(uint amount) public onlyOwner {
403
        require(_totalSupply + amount > _totalSupply);
404
        require(balances[owner] + amount > balances[owner]);
405
 
406
        balances[owner] += amount;
407
        _totalSupply += amount;
408
        Issue(amount);
409
    }
410
 
411
    // Redeem tokens.
412
    // These tokens are withdrawn from the owner address
413
    // if the balance must be enough to cover the redeem
414
    // or the call will fail.
415
    // @param _amount Number of tokens to be issued
416
    function redeem(uint amount) public onlyOwner {
417
        require(_totalSupply >= amount);
418
        require(balances[owner] >= amount);
419
 
420
        _totalSupply -= amount;
421
        balances[owner] -= amount;
422
        Redeem(amount);
423
    }
424
 
425
    function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner {
426
        // Ensure transparency by hardcoding limit beyond which fees can never be added
427
        require(newBasisPoints < 20);
428
        require(newMaxFee < 50);
429
 
430
        basisPointsRate = newBasisPoints;
431
        maximumFee = newMaxFee.mul(10**decimals);
432
 
433
        Params(basisPointsRate, maximumFee);
434
    }
435
 
436
    // Called when new token are issued
437
    event Issue(uint amount);
438
 
439
    // Called when tokens are redeemed
440
    event Redeem(uint amount);
441
 
442
    // Called when contract is deprecated
443
    event Deprecate(address newAddress);
444
 
445
    // Called if contract ever adds fees
446
    event Params(uint feeBasisPoints, uint maxFee);
447
}

Contract ABI

[
  {
    "constant": true,
    "inputs": [],
    "name": "name",
    "outputs": [
      {
        "name": "",
        "type": "string"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_upgradedAddress",
        "type": "address"
      }
    ],
    "name": "deprecate",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_spender",
        "type": "address"
      },
      {
        "name": "_value",
        "type": "uint256"
      }
    ],
    "name": "approve",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "deprecated",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_evilUser",
        "type": "address"
      }
    ],
    "name": "addBlackList",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "totalSupply",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_from",
        "type": "address"
      },
      {
        "name": "_to",
        "type": "address"
      },
      {
        "name": "_value",
        "type": "uint256"
      }
    ],
    "name": "transferFrom",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "upgradedAddress",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "name": "balances",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "decimals",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "maximumFee",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "_totalSupply",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [],
    "name": "unpause",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "_maker",
        "type": "address"
      }
    ],
    "name": "getBlackListStatus",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "",
        "type": "address"
      },
      {
        "name": "",
        "type": "address"
      }
    ],
    "name": "allowed",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "paused",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "who",
        "type": "address"
      }
    ],
    "name": "balanceOf",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [],
    "name": "pause",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getOwner",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "owner",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "symbol",
    "outputs": [
      {
        "name": "",
        "type": "string"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_to",
        "type": "address"
      },
      {
        "name": "_value",
        "type": "uint256"
      }
    ],
    "name": "transfer",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "newBasisPoints",
        "type": "uint256"
      },
      {
        "name": "newMaxFee",
        "type": "uint256"
      }
    ],
    "name": "setParams",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "issue",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "redeem",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "_owner",
        "type": "address"
      },
      {
        "name": "_spender",
        "type": "address"
      }
    ],
    "name": "allowance",
    "outputs": [
      {
        "name": "remaining",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "basisPointsRate",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "name": "isBlackListed",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_clearedUser",
        "type": "address"
      }
    ],
    "name": "removeBlackList",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "MAX_UINT",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "newOwner",
        "type": "address"
      }
    ],
    "name": "transferOwnership",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_blackListedUser",
        "type": "address"
      }
    ],
    "name": "destroyBlackFunds",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "name": "_initialSupply",
        "type": "uint256"
      },
      {
        "name": "_name",
        "type": "string"
      },
      {
        "name": "_symbol",
        "type": "string"
      },
      {
        "name": "_decimals",
        "type": "uint256"
      }
    ],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "Issue",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "Redeem",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "newAddress",
        "type": "address"
      }
    ],
    "name": "Deprecate",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "feeBasisPoints",
        "type": "uint256"
      },
      {
        "indexed": false,
        "name": "maxFee",
        "type": "uint256"
      }
    ],
    "name": "Params",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "_blackListedUser",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "_balance",
        "type": "uint256"
      }
    ],
    "name": "DestroyedBlackFunds",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "_user",
        "type": "address"
      }
    ],
    "name": "AddedBlackList",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "_user",
        "type": "address"
      }
    ],
    "name": "RemovedBlackList",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": true,
        "name": "spender",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Approval",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "name": "from",
        "type": "address"
      },
      {
        "indexed": true,
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Transfer",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [],
    "name": "Pause",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [],
    "name": "Unpause",
    "type": "event"
  }
]

Contract Creation Code

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