ETH Price: $2,488.07 (+2.92%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,386 ( -0.012%)

Market

Price

$11.60 @ 0.004662 ETH (+2.01%)

Onchain Market Cap

$11,600,000,000.00

Circulating Supply Market Cap

$7,278,127,566.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
31.539684752580646 LINK

Value
$365.86 ( ~0.14704556627669 Eth) [0.0000%]
0x95718F19424CbAD755d1dCFCe4D36660d2e4096d
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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 10445.45% |ETH 0.0003846 1112.17%

Market

Volume (24H):$336,785,988.00
Market Capitalization:$7,278,127,566.00
Circulating Supply:626,849,971.00 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
LBank
LINK-USDT$11.59
0.0046561 Eth
$32,898,964.00
2,839,167.490 LINK
17.4832%
2
Binance
LINK-USDT$11.61
0.0046591 Eth
$22,362,044.00
1,966,890.060 LINK
12.1118%
3
Coinbase Exchange
LINK-USD$11.59
0.0046541 Eth
$14,961,893.00
1,291,488.360 LINK
7.9528%
4
WhiteBIT
LINK-USDT$11.58
0.0046542 Eth
$10,884,963.00
939,991.630 LINK
5.7883%
5
Bybit
LINK-USDT$11.58
0.0046550 Eth
$10,671,112.00
938,843.236 LINK
5.7813%
6
Websea
LINK-USDT$11.58
0.0046559 Eth
$9,801,423.00
0.000 LINK
0.0000%
7
Bitget
LINK-USDT$11.58
0.0046541 Eth
$8,977,566.00
791,496.555 LINK
4.8739%
8
HTX
LINK-USDT$11.58
0.0046529 Eth
$8,326,298.00
733,133.054 LINK
4.5145%
9
Azbit
LINK-USDT$11.58
0.0046543 Eth
$5,419,568.00
477,710.800 LINK
2.9417%
10
P2B
LINK-USDT$11.59
0.0046551 Eth
$4,757,503.00
410,559.370 LINK
2.5282%
11
BVOX
LINK-USDT$11.58
0.0046531 Eth
$4,477,119.00
393,797.044 LINK
2.4249%
12
WEEX
LINK-USDT$11.59
0.0046579 Eth
$4,419,003.00
388,425.810 LINK
2.3919%
13
Slex
LINK-USDT$11.60
0.0046601 Eth
$3,943,275.00
346,499.820 LINK
2.1337%
14
Biconomy.com
LINK-USDT$11.58
0.0046547 Eth
$3,388,069.00
298,502.630 LINK
1.8381%
15
OKX
LINK-USDT$11.58
0.0046543 Eth
$3,211,800.00
282,037.209 LINK
1.7367%
16
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.56
0.0046444 Eth
$3,023,161.00
262,699.836 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.6177%
17
DigiFinex
LINK-USDT$11.58
0.0046557 Eth
$2,884,605.00
249,025.650 LINK
1.5335%
18
Trubit
LINK-USDT$11.59
0.0046552 Eth
$2,727,920.00
240,068.150 LINK
1.4783%
19
KuCoin
LINK-USDT$11.58
0.0046540 Eth
$2,322,769.00
200,592.308 LINK
1.2352%
20
Deepcoin
LINK-USDT$11.58
0.0046504 Eth
$2,265,237.00
203,474.240 LINK
1.2530%
21
Upbit
LINK-KRW$11.54
0.0046368 Eth
$2,242,676.00
194,394.509 LINK
1.1971%
22
XT.COM
LINK-USDT$11.58
0.0046501 Eth
$2,110,428.00
185,666.530 LINK
1.1433%
23
Binance
LINK-BTC$11.62
0.0046674 Eth
$1,734,959.00
150,331.990 LINK
0.9257%
24
CoinW
LINK-USDT$11.58
0.0046512 Eth
$1,691,539.00
146,132.980 LINK
0.8999%
25
C-Patex
LINK-USDT$11.58
0.0046530 Eth
$1,512,637.00
130,626.279 LINK
0.8044%
26
Gate.io
LINK-USDT$11.58
0.0046547 Eth
$1,444,552.00
126,577.000 LINK
0.7794%
27
Nonkyc.io
LINK-USDT$11.63
0.0046714 Eth
$1,356,210.00
119,569.604 LINK
0.7363%
28
Crypto.com Exchange
LINK-USDT$11.58
0.0046541 Eth
$1,154,912.00
99,711.500 LINK
0.6140%
29
BYDFi
LINK-USDT$11.60
0.0046574 Eth
$1,107,996.00
95,531.320 LINK
0.5883%
30
LATOKEN
LINK-BTC$11.60
0.0046625 Eth
$995,555.00
85,798.094 LINK
0.5283%
31
Azbit
LINK-ETH$11.59
0.0046545 Eth
$982,273.00
85,248.054 LINK
0.5249%
32
Bitvavo
LINK-EUR$11.59
0.0046555 Eth
$923,538.00
79,680.278 LINK
0.4907%
33
Hotcoin
LINK-USDT$11.57
0.0046498 Eth
$913,320.00
78,945.000 LINK
0.4861%
34
FMCPAY
LINK-USDT$11.58
0.0046501 Eth
$863,957.00
76,086.070 LINK
0.4685%
35
HashKey Global
LINK-USDT$11.57
0.0046506 Eth
$774,054.00
68,646.843 LINK
0.4227%
36
Dex-Trade
LINK-USDT$11.59
0.0046579 Eth
$770,637.00
66,494.660 LINK
0.4095%
37
Kraken
LINK-USD$11.60
0.0046599 Eth
$758,386.00
65,401.198 LINK
0.4027%
38
MEXC
LINK-USDT$11.58
0.0046522 Eth
$685,289.00
59,202.500 LINK
0.3646%
39
LATOKEN
LINK-USDT$11.59
0.0046561 Eth
$644,867.00
55,651.770 LINK
0.3427%
40
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.57
0.0046478 Eth
$623,961.00
54,234.618 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3340%
41
FMFW.io
LINK-USDT$11.58
0.0046555 Eth
$615,602.00
53,145.060 LINK
0.3273%
42
HitBTC
LINK-USDT$11.59
0.0046556 Eth
$603,319.00
53,158.600 LINK
0.3273%
43
WhiteBIT
LINK-BTC$11.58
0.0046550 Eth
$528,892.00
45,665.110 LINK
0.2812%
44
FMCPAY
LINK-BTC$11.58
0.0046523 Eth
$508,273.00
44,209.200 LINK
0.2722%
45
tanX
LINK-USDC$11.58
0.0046537 Eth
$505,560.00
44,474.380 LINK
0.2739%
46
CoinEx
LINK-USDT$11.58
0.0046522 Eth
$499,362.00
44,047.952 LINK
0.2712%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.56
0.0046436 Eth
$445,780.00
38,804.610 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2390%
48
FMCPAY
LINK-ETH$11.58
0.0046512 Eth
$439,445.00
38,112.640 LINK
0.2347%
49
Bithumb
LINK-KRW$11.57
0.0046496 Eth
$413,390.00
35,723.618 LINK
0.2200%
50
EXMO
LINK-USDT$11.58
0.0046522 Eth
$385,282.00
33,275.704 LINK
0.2049%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.59
0.0046558 Eth
$367,262.00
32,070.179 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1975%
52
PointPay
LINK-USDT$11.58
0.0046504 Eth
$362,675.00
31,890.557 LINK
0.1964%
53
Pionex
LINK-USDT$11.59
0.0046541 Eth
$339,807.00
29,901.120 LINK
0.1841%
54
Kraken
LINK-USDT$11.58
0.0046531 Eth
$303,646.00
26,223.631 LINK
0.1615%
55
BigONE
LINK-USDT$11.56
0.0046456 Eth
$295,362.00
25,553.060 LINK
0.1574%
56
WhiteBIT
LINK-EUR$11.58
0.0046498 Eth
$271,928.00
23,490.110 LINK
0.1446%
57
Phemex
LINK-USDT$11.59
0.0046527 Eth
$240,002.00
20,715.990 LINK
0.1276%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.57
0.0046492 Eth
$236,343.00
20,580.788 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1267%
59
Bybit
LINK-USDC$11.59
0.0046570 Eth
$205,407.00
17,970.801 LINK
0.1107%
60
BitMart
LINK-BTC$11.59
0.0046562 Eth
$178,807.00
15,430.040 LINK
0.0950%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.62
0.0046669 Eth
$174,421.00
15,163.272 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0934%
62
Hotcoin
LINK-BTC$11.58
0.0046548 Eth
$125,490.00
10,835.500 LINK
0.0667%
63
Hotcoin
LINK-ETH$11.59
0.0046570 Eth
$124,970.00
10,785.350 LINK
0.0664%
64
BitDelta
LINK-USDT$11.59
0.0046561 Eth
$124,239.00
10,955.000 LINK
0.0675%
65
Bitci TR
LINK-TRY$11.55
0.0046371 Eth
$117,518.00
10,308.140 LINK
0.0635%
66
Bitbank
LINK-JPY$11.62
0.0046692 Eth
$113,203.00
9,739.244 LINK
0.0600%
67
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.59
0.0046575 Eth
$112,080.00
9,724.878 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0599%
68
Slex
LINK-BTC$11.62
0.0046676 Eth
$96,441.00
8,364.800 LINK
0.0515%
69
Slex
LINK-ETH$11.62
0.0046691 Eth
$66,190.00
5,744.830 LINK
0.0354%
70
BYDFi
LINK-USDC$11.59
0.0046571 Eth
$66,019.00
5,697.310 LINK
0.0351%
71
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.56
0.0046436 Eth
$65,344.00
63,983.795 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3940%
72
PointPay
LINK-BTC$11.62
0.0046660 Eth
$62,815.00
5,449.912 LINK
0.0336%
73
Bitget
LINK-EUR$11.60
0.0046641 Eth
$60,345.00
5,330.590 LINK
0.0328%
74
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.62
0.0046669 Eth
$55,389.00
54,270.897 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3342%
75
WhiteBIT
LINK-TRY$11.62
0.0046658 Eth
$52,725.00
4,538.970 LINK
0.0280%
76
GMO Japan
LINK-JPY$11.56
0.0046445 Eth
$47,922.00
4,145.100 LINK
0.0255%
77
Bitso
LINK-USD$11.58
0.0046537 Eth
$32,666.00
2,819.748 LINK
0.0174%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.62
0.0046669 Eth
$32,292.00
2,839.640 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0175%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.58
0.0046527 Eth
$29,804.00
2,587.135 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0159%
80
EXMO
LINK-BTC$11.60
0.0046615 Eth
$29,031.00
2,502.368 LINK
0.0154%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.65
0.0046784 Eth
$28,439.00
2,480.262 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0153%
82
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.57
0.0046491 Eth
$27,809.00
27,170.695 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1673%
83
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.57
0.0046492 Eth
$15,714.95
1,388.675 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0086%
84
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.57
0.0046489 Eth
$14,029.97
1,217.807 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0075%
85
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.62
0.0046695 Eth
$13,846.01
21.908 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.59
0.0046590 Eth
$9,890.94
868.223 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0053%
87
Coinone
LINK-KRW$11.59
0.0046597 Eth
$7,548.55
651.065 LINK
0.0040%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.57
0.0046492 Eth
$4,726.51
4,615.236 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0284%
89
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.56
0.0046454 Eth
$4,292.05
379.037 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0023%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.58
0.0046552 Eth
$3,929.21
341.363 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0021%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.59
0.0046565 Eth
$3,648.42
319.047 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0020%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.60
0.0046606 Eth
$2,503.44
217.087 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0013%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.61
0.0046657 Eth
$2,182.23
188.060 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0012%
94
CoinEx
LINK-USDC$11.58
0.0046515 Eth
$2,102.24
185.328 LINK
0.0011%
95
CoinEx
LINK-BTC$11.60
0.0046581 Eth
$2,079.94
180.862 LINK
0.0011%
96
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.55
0.0046419 Eth
$1,950.76
170.136 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0010%
97
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.52
0.0046320 Eth
$1,516.34
132.181 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.61
0.0046657 Eth
$816.08
71.574 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.62
0.0046690 Eth
$187.37
16.327 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.57
0.0046449 Eth
$140.07
244.813 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0015%

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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