ETH Price: $1,785.95 (-1.90%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

750,133 ( -0.016%)

Market

Price

$12.63 @ 0.007072 ETH (-0.80%)

Onchain Market Cap

$12,630,000,000.00

Circulating Supply Market Cap

$8,053,526,314.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
MEV Bot: 0xA69...78C
Balance
12,275.464093423840439816 LINK

Value
$155,039.11 ( ~86.8106 Eth) [0.0012%]
0xa69babef1ca67a37ffaf7a485dfff3382056e78c
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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 11381.82% |ETH 0.0003846 1738.79%

Market

Volume (24H):$272,530,127.00
Market Capitalization:$8,053,526,314.00
Circulating Supply:638,099,971.00 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
Binance
LINK-USDT$12.67
0.0070903 Eth
$24,316,908.00
1,886,378.820 LINK
15.8801%
2
Websea
LINK-USDT$12.61
0.0070728 Eth
$23,581,941.00
0.000 LINK
0.0000%
3
Coinbase Exchange
LINK-USD$12.67
0.0070918 Eth
$16,165,686.00
1,276,003.320 LINK
10.7418%
4
Slex
LINK-USDT$12.67
0.0070903 Eth
$7,424,433.00
576,560.840 LINK
4.8537%
5
HTX
LINK-USDT$12.67
0.0070897 Eth
$7,276,352.00
564,487.896 LINK
4.7520%
6
Ecxx
LINK-USDT$12.62
0.0070692 Eth
$7,142,578.00
566,051.440 LINK
4.7652%
7
KuCoin
LINK-USDT$12.67
0.0070921 Eth
$6,251,575.00
493,433.105 LINK
4.1539%
8
WhiteBIT
LINK-USDT$12.65
0.0070913 Eth
$5,361,694.00
423,884.600 LINK
3.5684%
9
P2B
LINK-USDT$12.67
0.0070925 Eth
$5,176,424.00
408,620.560 LINK
3.4399%
10
CoinW
LINK-USDT$12.68
0.0070982 Eth
$5,046,266.00
398,100.850 LINK
3.3513%
11
BVOX
LINK-USDT$12.62
0.0070757 Eth
$4,951,475.00
384,157.642 LINK
3.2340%
12
Gate.io
LINK-USDT$12.66
0.0070887 Eth
$4,828,283.00
374,902.000 LINK
3.1560%
13
Bybit
LINK-USDT$12.67
0.0070903 Eth
$4,214,447.00
327,236.882 LINK
2.7548%
14
WEEX
LINK-USDT$12.62
0.0070721 Eth
$4,186,940.00
325,031.797 LINK
2.7362%
15
Binance
LINK-FDUSD$12.58
0.0070578 Eth
$4,096,165.00
319,090.940 LINK
2.6862%
16
OKX
LINK-USDT$12.67
0.0070915 Eth
$3,726,925.00
289,135.200 LINK
2.4340%
17
Crypto.com Exchange
LINK-USDT$12.67
0.0070951 Eth
$3,108,651.00
245,271.530 LINK
2.0648%
18
DigiFinex
LINK-USDT$12.67
0.0070932 Eth
$3,053,929.00
240,997.540 LINK
2.0288%
19
Hotcoin
LINK-USDT$12.68
0.0070960 Eth
$2,618,513.00
206,563.600 LINK
1.7389%
20
Coinstore
LINK-USDT$12.62
0.0070710 Eth
$2,542,030.00
197,317.410 LINK
1.6611%
21
MEXC
LINK-EUR$12.64
0.0070786 Eth
$2,496,017.00
197,524.340 LINK
1.6628%
22
XT.COM
LINK-USDT$12.66
0.0070867 Eth
$2,423,741.00
188,027.370 LINK
1.5829%
23
Deepcoin
LINK-USDT$12.67
0.0070904 Eth
$2,245,615.00
196,133.941 LINK
1.6511%
24
Azbit
LINK-USDT$12.65
0.0070838 Eth
$1,497,347.00
116,187.854 LINK
0.9781%
25
BYDFi
LINK-USDT$12.63
0.0070852 Eth
$1,487,172.00
117,727.400 LINK
0.9911%
26
Kraken
LINK-USD$12.67
0.0070931 Eth
$1,273,484.00
100,501.521 LINK
0.8461%
27
Dcoin
LINK-USDT$12.67
0.0070925 Eth
$1,034,625.00
81,672.000 LINK
0.6875%
28
Coinbase Exchange
LINK-ETH$12.64
0.0070766 Eth
$1,027,156.00
81,283.100 LINK
0.6843%
29
Biconomy.com
LINK-USDT$12.67
0.0070978 Eth
$1,007,029.00
78,164.587 LINK
0.6580%
30
FMCPAY
LINK-USDT$12.65
0.0070893 Eth
$954,429.00
74,243.243 LINK
0.6250%
31
Tapbit
LINK-USDT$12.67
0.0070897 Eth
$953,398.00
74,098.650 LINK
0.6238%
32
QMall
LINK-USDT$12.68
0.0070984 Eth
$907,277.00
70,434.011 LINK
0.5929%
33
Hibt
LINK-USDT$12.65
0.0070890 Eth
$845,486.00
65,595.475 LINK
0.5522%
34
LATOKEN
LINK-USDT$12.60
0.0070680 Eth
$835,076.00
66,250.848 LINK
0.5577%
35
FMCPAY
LINK-ETH$12.65
0.0070849 Eth
$791,079.00
62,285.600 LINK
0.5243%
36
Dex-Trade
LINK-USDT$12.67
0.0070925 Eth
$788,059.00
62,208.410 LINK
0.5237%
37
Bitvavo
LINK-EUR$12.65
0.0070840 Eth
$657,545.00
51,981.256 LINK
0.4376%
38
FMCPAY
LINK-BTC$12.65
0.0070852 Eth
$586,979.00
46,055.800 LINK
0.3877%
39
tanX
LINK-USDC$12.66
0.0070898 Eth
$566,158.00
43,933.440 LINK
0.3698%
40
Coinbase Exchange
LINK-EUR$12.67
0.0070932 Eth
$518,002.00
40,886.110 LINK
0.3442%
41
Coinbase Exchange
LINK-BTC$12.66
0.0070899 Eth
$455,693.00
36,006.390 LINK
0.3031%
42
WhiteBIT
LINK-USDC$12.66
0.0070897 Eth
$406,115.00
32,066.680 LINK
0.2699%
43
CoinEx
LINK-USDT$12.65
0.0070894 Eth
$385,519.00
29,943.077 LINK
0.2521%
44
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.67
0.0070910 Eth
$347,189.00
27,306.238 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2299%
45
Coinbase Exchange
LINK-GBP$12.57
0.0070372 Eth
$306,967.00
24,421.760 LINK
0.2056%
46
QMall
LINK-USDC$12.66
0.0070926 Eth
$293,451.00
22,803.971 LINK
0.1920%
47
BitMart
LINK-BTC$12.66
0.0070878 Eth
$288,346.00
22,773.800 LINK
0.1917%
48
BigONE
LINK-USDT$12.63
0.0070755 Eth
$257,935.00
20,414.870 LINK
0.1719%
49
EXMO
LINK-USDT$12.67
0.0070942 Eth
$256,090.00
20,207.111 LINK
0.1701%
50
Coinbase Exchange
LINK-USDT$12.66
0.0070926 Eth
$216,965.00
17,131.672 LINK
0.1442%
51
Slex
LINK-ETH$12.65
0.0070828 Eth
$207,393.00
16,325.780 LINK
0.1374%
52
OKX
LINK-USDC$12.67
0.0070903 Eth
$178,839.00
13,889.719 LINK
0.1169%
53
XT.COM
LINK-ETH$12.66
0.0070869 Eth
$176,134.00
13,853.620 LINK
0.1166%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.59
0.0070485 Eth
$168,937.00
13,334.852 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1123%
55
BitStorage
LINK-ETH$12.64
0.0070818 Eth
$158,065.00
12,502.890 LINK
0.1053%
56
WhiteBIT
LINK-TRY$12.70
0.0071128 Eth
$156,958.00
12,358.300 LINK
0.1040%
57
Bitci TR
LINK-TRY$12.75
0.0071433 Eth
$135,330.00
10,484.030 LINK
0.0883%
58
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.67
0.0070939 Eth
$128,857.00
10,031.057 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0844%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.60
0.0070550 Eth
$104,929.00
8,263.367 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0696%
60
WhiteBIT
LINK-BTC$12.63
0.0070770 Eth
$99,689.00
7,892.730 LINK
0.0664%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.65
0.0070832 Eth
$95,808.00
7,535.288 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0634%
62
BitMart
LINK-ETH$12.66
0.0070866 Eth
$92,614.00
7,315.900 LINK
0.0616%
63
Binance US
LINK-USDT$12.63
0.0070675 Eth
$88,287.00
6,992.746 LINK
0.0589%
64
BYDFi
LINK-USDC$12.62
0.0070771 Eth
$79,653.00
6,310.830 LINK
0.0531%
65
Hotcoin
LINK-BTC$12.63
0.0070818 Eth
$72,832.00
5,766.910 LINK
0.0485%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.66
0.0070872 Eth
$60,544.00
4,756.940 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0400%
67
GMO Japan
LINK-JPY$12.64
0.0070781 Eth
$57,085.00
4,517.800 LINK
0.0380%
68
Coinone
LINK-KRW$12.80
0.0071642 Eth
$49,469.00
3,865.122 LINK
0.0325%
69
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.67
0.0070904 Eth
$46,263.00
47,072.519 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3963%
70
Aerodrome SlipStream
0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196-0X4200000000000000000000000000000000000006$12.61
0.0070607 Eth
$45,940.00
3,624.811 0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196
0.0305%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.67
0.0070904 Eth
$36,831.00
2,857.303 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0241%
72
Bittime
LINK-USDT$12.63
0.0070817 Eth
$30,442.00
2,364.360 LINK
0.0199%
73
Bittime
LINK-IDR$12.61
0.0070601 Eth
$30,426.00
2,377.490 LINK
0.0200%
74
Bitcointry
LINK-USDT$12.64
0.0070837 Eth
$28,855.00
2,240.421 LINK
0.0189%
75
Backpack Exchange
LINK-USDC$12.67
0.0070948 Eth
$25,804.00
2,005.850 LINK
0.0169%
76
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.59
0.0070481 Eth
$24,081.00
24,484.804 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2061%
77
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.66
0.0070878 Eth
$23,350.00
1,834.794 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0154%
78
Dex-Trade
LINK-ETH$12.65
0.0070851 Eth
$21,303.00
1,683.350 LINK
0.0142%
79
EXMO
LINK-BTC$12.66
0.0070892 Eth
$19,156.84
1,512.665 LINK
0.0127%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.62
0.0070670 Eth
$16,734.09
1,314.441 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0111%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.65
0.0070794 Eth
$15,812.71
1,246.520 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0105%
82
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.63
0.0070702 Eth
$15,145.83
15,155.160 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1276%
83
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.59
0.0070489 Eth
$14,391.63
14,731.019 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1240%
84
Hotcoin
LINK-ETH$12.62
0.0070770 Eth
$12,859.25
1,018.910 LINK
0.0086%
85
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.58
0.0070422 Eth
$8,396.36
654.459 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0055%
86
Uniswap V4 (Ethereum)
0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.63
0.0070704 Eth
$8,008.79
8,178.724 0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A
0.0689%
87
Bitexen
LINK-TRY$12.55
0.0070320 Eth
$7,457.68
594.022 LINK
0.0050%
88
Oceanex
LINK-USDT$12.66
0.0070931 Eth
$7,178.53
566.920 LINK
0.0048%
89
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$12.67
0.0070917 Eth
$4,506.07
7.020 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
90
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.66
0.0070875 Eth
$4,424.90
4,491.651 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0378%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.64
0.0070771 Eth
$3,366.48
260.985 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0022%
92
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$12.59
0.0070479 Eth
$3,053.43
241.331 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0020%
93
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XAF88D065E77C8CC2239327C5EDB3A432268E5831$12.57
0.0070365 Eth
$2,547.08
198.533 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0017%
94
CoinEx
LINK-BTC$12.70
0.0071137 Eth
$2,526.53
197.650 LINK
0.0017%
95
CoinEx
LINK-USDC$12.68
0.0071061 Eth
$2,301.74
178.078 LINK
0.0015%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.66
0.0070871 Eth
$1,359.46
105.413 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.67
0.0070987 Eth
$983.43
77.308 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.66
0.0070916 Eth
$922.79
72.499 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$12.65
0.0070847 Eth
$573.69
44.296 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
100
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.59
0.0070486 Eth
$350.57
2.344 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%

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

API
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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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