ETH Price: $2,631.95 (-1.55%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

733,154 ( 0.002%)

Market

Price

$18.47 @ 0.007018 ETH (-1.37%)

Onchain Market Cap

$18,470,000,000.00

Circulating Supply Market Cap

$11,771,649,142.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
100.97269693 LINK

Value
$1,864.97 ( ~0.708588580891211 Eth) [0.0000%]
0xd99DA49A3c4573d6EC000Cf8C495e02665176c68
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OVERVIEW

A blockchain-based middleware, acting as a bridge between cryptocurrency smart contracts, data feeds, APIs and traditional bank account payments.

Profitability / Loss

Since Initial Offer Price
:$0.11 16690.91% |ETH 0.0003846 1724.75%

Market

Volume (24H):$547,827,077.00
Market Capitalization:$11,771,649,142.00
Circulating Supply:638,099,970.00 LINK
Market Data Source: Coinmarketcap

ICO Information

ICO Start Date : Sep 19, 2017   
Total Cap : $32,000,000
ICO Price  : $0.11 | 0.0003846 ETH
Country : USA

# Exchange Pair Price  24H Volume % Volume
1
Binance
LINK-USDT$18.46
0.0070208 Eth
$68,156,299.00
3,730,508.450 LINK
21.0781%
2
Coinbase Exchange
LINK-USD$18.51
0.0070397 Eth
$31,349,278.00
1,693,365.630 LINK
9.5679%
3
Bybit
LINK-USDT$18.51
0.0070405 Eth
$26,705,866.00
1,463,354.623 LINK
8.2683%
4
HTX
LINK-USDT$18.50
0.0070338 Eth
$16,271,855.00
882,925.257 LINK
4.9887%
5
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.45
0.0070148 Eth
$14,103,674.00
769,327.488 0X514910771AF9CA656AF840DFF83E8264ECF986CA
4.3469%
6
P2B
LINK-USDT$18.42
0.0070010 Eth
$13,164,809.00
714,589.270 LINK
4.0376%
7
OKX
LINK-USDT$18.52
0.0070428 Eth
$10,533,359.00
573,468.957 LINK
3.2402%
8
Gate.io
LINK-USDT$18.51
0.0070388 Eth
$10,355,924.00
566,472.560 LINK
3.2007%
9
MEXC
LINK-USDT$18.45
0.0070137 Eth
$8,918,905.00
483,422.470 LINK
2.7314%
10
DigiFinex
LINK-USDT$18.49
0.0070328 Eth
$8,836,818.00
477,858.010 LINK
2.7000%
11
XT.COM
LINK-USDT$18.40
0.0070021 Eth
$6,767,926.00
370,304.240 LINK
2.0923%
12
Coinstore
LINK-USDT$18.49
0.0070265 Eth
$5,804,554.00
317,241.520 LINK
1.7925%
13
BTSE
LINK-USDT$18.50
0.0070352 Eth
$5,547,566.00
299,812.968 LINK
1.6940%
14
Binance
LINK-USDC$18.51
0.0070390 Eth
$5,515,612.00
302,409.000 LINK
1.7087%
15
Bitunix
LINK-USDT$18.48
0.0070275 Eth
$5,029,395.00
272,155.570 LINK
1.5377%
16
CoinW
LINK-USDT$18.48
0.0070239 Eth
$4,962,411.00
268,564.560 LINK
1.5174%
17
KuCoin
LINK-USDT$18.51
0.0070380 Eth
$4,795,379.00
259,119.163 LINK
1.4641%
18
Kraken
LINK-USD$18.48
0.0070284 Eth
$4,226,259.00
228,678.549 LINK
1.2921%
19
Azbit
LINK-USDT$18.51
0.0070341 Eth
$4,050,302.00
221,612.385 LINK
1.2522%
20
Hotcoin
LINK-USDT$18.43
0.0070042 Eth
$4,028,947.00
218,616.780 LINK
1.2352%
21
BYDFi
LINK-USDT$18.27
0.0069535 Eth
$3,792,886.00
207,550.080 LINK
1.1727%
22
LBank
LINK-USDT$18.47
0.0070232 Eth
$3,346,064.00
181,143.330 LINK
1.0235%
23
Bitvavo
LINK-EUR$18.49
0.0070274 Eth
$3,257,147.00
176,159.918 LINK
0.9953%
24
LATOKEN
LINK-USDT$18.51
0.0070349 Eth
$3,252,491.00
175,719.327 LINK
0.9929%
25
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.44
0.0070116 Eth
$3,086,923.00
168,368.171 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.9513%
26
Coinbase Exchange
LINK-EUR$18.52
0.0070406 Eth
$2,908,349.00
157,015.210 LINK
0.8872%
27
QMall
LINK-USDT$18.47
0.0070206 Eth
$2,813,463.00
154,016.259 LINK
0.8702%
28
Dex-Trade
LINK-USDT$18.53
0.0070471 Eth
$2,240,586.00
120,900.780 LINK
0.6831%
29
FMCPAY
LINK-USDT$18.47
0.0070213 Eth
$2,111,781.00
115,040.412 LINK
0.6500%
30
Biconomy.com
LINK-USDT$18.41
0.0069998 Eth
$1,684,614.00
91,368.470 LINK
0.5163%
31
WhiteBIT
LINK-USDT$18.53
0.0070466 Eth
$1,431,891.00
77,277.430 LINK
0.4366%
32
Coinbase Exchange
LINK-GBP$18.51
0.0070371 Eth
$1,377,451.00
74,411.620 LINK
0.4204%
33
FMCPAY
LINK-ETH$18.46
0.0070148 Eth
$1,248,043.00
67,783.680 LINK
0.3830%
34
CoinEx
LINK-USDT$18.39
0.0069925 Eth
$1,224,347.00
66,643.938 LINK
0.3766%
35
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.41
0.0070008 Eth
$1,183,472.00
64,608.560 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3651%
36
FMCPAY
LINK-BTC$18.40
0.0069922 Eth
$1,081,883.00
58,421.200 LINK
0.3301%
37
Bitstamp
LINK-USD$18.51
0.0070394 Eth
$1,066,126.00
57,597.305 LINK
0.3254%
38
PointPay
LINK-USDT$18.50
0.0070320 Eth
$1,027,389.00
56,261.077 LINK
0.3179%
39
Binance
LINK-ETH$18.47
0.0070181 Eth
$964,163.00
52,670.930 LINK
0.2976%
40
Trubit
LINK-USDT$18.47
0.0070208 Eth
$921,763.00
49,895.300 LINK
0.2819%
41
tanX
LINK-USDC$18.42
0.0070031 Eth
$877,890.00
47,605.800 LINK
0.2690%
42
Tokpie
LINK-USDT$18.37
0.0069854 Eth
$821,729.00
44,736.689 LINK
0.2528%
43
Bitbank
LINK-JPY$18.47
0.0070212 Eth
$762,024.00
41,258.805 LINK
0.2331%
44
EXMO
LINK-USDT$18.51
0.0070401 Eth
$727,006.00
39,267.828 LINK
0.2219%
45
Phemex
LINK-USDT$18.37
0.0069869 Eth
$710,727.00
38,687.110 LINK
0.2186%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.48
0.0070269 Eth
$681,186.00
37,139.793 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2098%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.43
0.0070088 Eth
$608,421.00
33,383.859 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1886%
48
BitStorage
LINK-USDT$18.51
0.0070395 Eth
$564,682.00
30,502.850 LINK
0.1723%
49
Binance
LINK-TRY$18.45
0.0070218 Eth
$553,832.00
30,104.280 LINK
0.1701%
50
BigONE
LINK-USDT$18.44
0.0070104 Eth
$547,274.00
29,673.240 LINK
0.1677%
51
EarnBIT
LINK-USDT$18.49
0.0070265 Eth
$500,957.00
27,280.214 LINK
0.1541%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.43
0.0070068 Eth
$462,617.00
50,593.425 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2859%
53
QMall
LINK-USDC$18.44
0.0070109 Eth
$449,875.00
24,637.341 LINK
0.1392%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.46
0.0070190 Eth
$436,358.00
23,777.867 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1343%
55
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.48
0.0070273 Eth
$423,416.00
419,463.416 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3701%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.47
0.0070234 Eth
$389,585.00
21,622.595 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1222%
57
WhiteBIT
LINK-TRY$18.65
0.0070940 Eth
$354,378.00
18,997.780 LINK
0.1073%
58
Bitstamp
LINK-EUR$18.28
0.0069510 Eth
$353,743.00
19,353.973 LINK
0.1094%
59
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.50
0.0070347 Eth
$314,463.00
17,123.247 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0967%
60
Slex
LINK-ETH$18.35
0.0069858 Eth
$312,310.00
16,979.380 LINK
0.0959%
61
Coinbase Exchange
LINK-ETH$18.49
0.0070297 Eth
$290,474.00
15,712.680 LINK
0.0888%
62
Bitkub
LINK-THB$18.53
0.0070456 Eth
$270,438.00
14,595.891 LINK
0.0825%
63
BitMart
LINK-BTC$18.50
0.0070332 Eth
$257,834.00
13,938.360 LINK
0.0788%
64
BitDelta
LINK-USDT$18.45
0.0070134 Eth
$237,313.00
12,941.000 LINK
0.0731%
65
Gemini
LINK-USD$18.48
0.0070271 Eth
$233,603.00
12,642.504 LINK
0.0714%
66
LATOKEN
LINK-BTC$18.35
0.0069863 Eth
$224,317.00
12,224.287 LINK
0.0691%
67
Coinbase Exchange
LINK-BTC$18.52
0.0070400 Eth
$219,643.00
11,860.440 LINK
0.0670%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.43
0.0070068 Eth
$212,644.00
11,742.140 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0663%
69
Bitso
LINK-USD$18.45
0.0070145 Eth
$206,138.00
11,174.803 LINK
0.0631%
70
WhiteBIT
LINK-EUR$18.56
0.0070553 Eth
$197,760.00
10,653.300 LINK
0.0602%
71
BitStorage
LINK-ETH$18.37
0.0069886 Eth
$190,215.00
10,351.920 LINK
0.0585%
72
Bitci TR
LINK-TRY$18.59
0.0070642 Eth
$186,403.00
10,041.330 LINK
0.0567%
73
WhiteBIT
LINK-BTC$18.59
0.0070648 Eth
$178,117.00
9,582.200 LINK
0.0541%
74
GMO Japan
LINK-JPY$18.46
0.0070199 Eth
$173,676.00
9,407.800 LINK
0.0532%
75
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.49
0.0070290 Eth
$162,377.00
8,867.903 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0501%
76
OKX
LINK-USDC$18.53
0.0070459 Eth
$150,582.00
8,244.913 LINK
0.0466%
77
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.41
0.0070004 Eth
$141,706.00
7,764.486 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0439%
78
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.43
0.0070094 Eth
$139,026.00
7,578.543 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0428%
79
Hotcoin
LINK-BTC$18.50
0.0070359 Eth
$137,856.00
7,451.320 LINK
0.0421%
80
BYDFi
LINK-USDC$18.48
0.0070245 Eth
$124,628.00
6,744.750 LINK
0.0381%
81
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.44
0.0070112 Eth
$123,331.00
121,136.645 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6844%
82
CoinTR
LINK-TRY$18.57
0.0070569 Eth
$121,930.00
6,575.700 LINK
0.0372%
83
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.46
0.0070175 Eth
$103,118.00
5,668.365 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0320%
84
KuCoin
LINK-USDC$18.50
0.0070371 Eth
$89,366.00
4,829.526 LINK
0.0273%
85
BitMart
LINK-ETH$18.47
0.0070181 Eth
$82,155.00
4,449.120 LINK
0.0251%
86
KuCoin
LINK-BTC$18.45
0.0070156 Eth
$64,322.00
3,486.751 LINK
0.0197%
87
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.45
0.0070155 Eth
$59,148.00
3,221.954 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0182%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.47
0.0070259 Eth
$47,638.00
2,608.133 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0147%
89
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.54
0.0070526 Eth
$46,435.00
2,537.392 0X5947BB275C521040051D82396192181B413227A3
0.0143%
90
EXMO
LINK-BTC$18.54
0.0070505 Eth
$44,583.00
2,404.566 LINK
0.0136%
91
Hotcoin
LINK-ETH$18.42
0.0070013 Eth
$36,670.00
1,990.560 LINK
0.0112%
92
Bitexen
LINK-TRY$18.38
0.0069904 Eth
$33,454.00
1,820.249 LINK
0.0103%
93
Dex-Trade
LINK-ETH$18.39
0.0069960 Eth
$26,245.00
1,427.340 LINK
0.0081%
94
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.41
0.0070009 Eth
$22,058.00
32.712 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
95
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.49
0.0070270 Eth
$19,723.36
19,477.265 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1101%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$18.31
0.0069610 Eth
$18,330.51
999.667 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0056%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$18.48
0.0070272 Eth
$18,316.98
1,003.377 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0057%
98
CoinEx
LINK-USDC$18.37
0.0069808 Eth
$18,195.89
999.058 LINK
0.0056%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$18.42
0.0070053 Eth
$16,697.21
909.274 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0051%
100
HTX
LINK-BTC$18.42
0.0070040 Eth
$9,889.33
528.527 LINK
0.0030%

Contract Source Code Verified (Exact Match)

Contract Name:
LinkToken

Compiler Version
v0.4.16+commit.d7661dd9

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, Audited

Contract Source Code (Solidity)Audit Report

/**
 *Submitted for verification at Etherscan.io on 2017-09-23
*/

pragma solidity ^0.4.16;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value) returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) returns (bool);
  function approve(address spender, uint256 value) returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract ERC677 is ERC20 {
  function transferAndCall(address to, uint value, bytes data) returns (bool success);

  event Transfer(address indexed from, address indexed to, uint value, bytes data);
}

contract ERC677Receiver {
  function onTokenTransfer(address _sender, uint _value, bytes _data);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances. 
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) returns (bool) {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of. 
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) constant returns (uint256 balance) {
    return balances[_owner];
  }

}


/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }
  
    /*
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until 
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   */
  function increaseApproval (address _spender, uint _addedValue) 
    returns (bool success) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval (address _spender, uint _subtractedValue) 
    returns (bool success) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract ERC677Token is ERC677 {

  /**
  * @dev transfer token to a contract address with additional data if the recipient is a contact.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  * @param _data The extra data to be passed to the receiving contract.
  */
  function transferAndCall(address _to, uint _value, bytes _data)
    public
    returns (bool success)
  {
    super.transfer(_to, _value);
    Transfer(msg.sender, _to, _value, _data);
    if (isContract(_to)) {
      contractFallback(_to, _value, _data);
    }
    return true;
  }


  // PRIVATE

  function contractFallback(address _to, uint _value, bytes _data)
    private
  {
    ERC677Receiver receiver = ERC677Receiver(_to);
    receiver.onTokenTransfer(msg.sender, _value, _data);
  }

  function isContract(address _addr)
    private
    returns (bool hasCode)
  {
    uint length;
    assembly { length := extcodesize(_addr) }
    return length > 0;
  }

}

contract LinkToken is StandardToken, ERC677Token {

  uint public constant totalSupply = 10**27;
  string public constant name = 'ChainLink Token';
  uint8 public constant decimals = 18;
  string public constant symbol = 'LINK';

  function LinkToken()
    public
  {
    balances[msg.sender] = totalSupply;
  }

  /**
  * @dev transfer token to a specified address with additional data if the recipient is a contract.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  * @param _data The extra data to be passed to the receiving contract.
  */
  function transferAndCall(address _to, uint _value, bytes _data)
    public
    validRecipient(_to)
    returns (bool success)
  {
    return super.transferAndCall(_to, _value, _data);
  }

  /**
  * @dev transfer token to a specified address.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint _value)
    public
    validRecipient(_to)
    returns (bool success)
  {
    return super.transfer(_to, _value);
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value)
    public
    validRecipient(_spender)
    returns (bool)
  {
    return super.approve(_spender,  _value);
  }

  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value)
    public
    validRecipient(_to)
    returns (bool)
  {
    return super.transferFrom(_from, _to, _value);
  }


  // MODIFIERS

  modifier validRecipient(address _recipient) {
    require(_recipient != address(0) && _recipient != address(this));
    _;
  }

}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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