ETH Price: $1,785.01 (-1.95%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

750,126 ( -0.016%)

Market

Price

$12.63 @ 0.007076 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
Binance Dep: 0x4ce73317C52efCfC2D8695479B43cBB649a15395
Balance
0 LINK

Value
$0.00
0x4ce73317c52efcfc2d8695479b43cbb649a15395
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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 1739.83%

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$12.63
0.0070730 Eth
$24,790,589.00
1,923,327.170 LINK
16.1059%
2
Websea
LINK-USDT$12.61
0.0070728 Eth
$23,581,941.00
0.000 LINK
0.0000%
3
Coinbase Exchange
LINK-USD$12.62
0.0070756 Eth
$16,046,931.00
1,271,446.850 LINK
10.6471%
4
MEXC
LINK-USDT$12.62
0.0070773 Eth
$9,565,611.00
758,247.030 LINK
6.3496%
5
Slex
LINK-USDT$12.63
0.0070784 Eth
$7,419,373.00
576,160.440 LINK
4.8248%
6
HTX
LINK-USDT$12.66
0.0070909 Eth
$7,364,073.00
571,001.676 LINK
4.7816%
7
KuCoin
LINK-USDT$12.63
0.0070824 Eth
$6,311,340.00
499,696.538 LINK
4.1845%
8
WhiteBIT
LINK-USDT$12.65
0.0070913 Eth
$5,361,694.00
423,884.600 LINK
3.5496%
9
P2B
LINK-USDT$12.62
0.0070729 Eth
$5,224,739.00
414,081.450 LINK
3.4675%
10
CoinW
LINK-USDT$12.61
0.0070739 Eth
$5,072,285.00
402,250.510 LINK
3.3684%
11
BVOX
LINK-USDT$12.62
0.0070757 Eth
$4,951,475.00
384,157.642 LINK
3.2169%
12
Gate.io
LINK-USDT$12.64
0.0070861 Eth
$4,860,550.00
377,425.380 LINK
3.1606%
13
Bybit
LINK-USDT$12.64
0.0070896 Eth
$4,266,288.00
331,319.432 LINK
2.7745%
14
WEEX
LINK-USDT$12.62
0.0070721 Eth
$4,186,940.00
325,031.797 LINK
2.7218%
15
Binance
LINK-FDUSD$12.58
0.0070578 Eth
$4,096,165.00
319,090.940 LINK
2.6721%
16
OKX
LINK-USDT$12.64
0.0070879 Eth
$3,786,318.00
293,804.650 LINK
2.4603%
17
DigiFinex
LINK-USDT$12.64
0.0070893 Eth
$3,085,827.00
244,051.290 LINK
2.0437%
18
Hotcoin
LINK-USDT$12.63
0.0070784 Eth
$2,634,163.00
208,629.600 LINK
1.7471%
19
Coinstore
LINK-USDT$12.62
0.0070751 Eth
$2,565,447.00
199,158.350 LINK
1.6678%
20
MEXC
LINK-EUR$12.64
0.0070859 Eth
$2,518,069.00
199,269.480 LINK
1.6687%
21
XT.COM
LINK-USDT$12.62
0.0070769 Eth
$2,459,212.00
190,815.280 LINK
1.5979%
22
MEXC
LINK-USDC$12.61
0.0070743 Eth
$2,311,357.00
183,287.940 LINK
1.5349%
23
AscendEX (BitMax)
LINK-USDT$12.65
0.0070886 Eth
$1,729,230.00
136,663.800 LINK
1.1444%
24
Azbit
LINK-USDT$12.62
0.0070785 Eth
$1,542,931.00
119,810.487 LINK
1.0033%
25
BYDFi
LINK-USDT$12.63
0.0070852 Eth
$1,487,172.00
117,727.400 LINK
0.9858%
26
Dcoin
LINK-USDT$12.65
0.0070900 Eth
$1,052,647.00
83,200.000 LINK
0.6967%
27
Coinbase Exchange
LINK-ETH$12.62
0.0070770 Eth
$1,026,191.00
81,283.100 LINK
0.6807%
28
Biconomy.com
LINK-USDT$12.65
0.0070901 Eth
$1,010,782.00
78,477.007 LINK
0.6572%
29
FMCPAY
LINK-USDT$12.64
0.0070846 Eth
$953,966.00
74,202.443 LINK
0.6214%
30
Tapbit
LINK-USDT$12.62
0.0070729 Eth
$944,127.00
73,354.020 LINK
0.6143%
31
QMall
LINK-USDT$12.60
0.0070715 Eth
$904,911.00
70,257.323 LINK
0.5883%
32
Hibt
LINK-USDT$12.63
0.0070807 Eth
$852,559.00
66,154.106 LINK
0.5540%
33
LATOKEN
LINK-USDT$12.60
0.0070680 Eth
$835,076.00
66,250.848 LINK
0.5548%
34
Dex-Trade
LINK-USDT$12.64
0.0070841 Eth
$795,416.00
62,947.460 LINK
0.5271%
35
FMCPAY
LINK-ETH$12.60
0.0070691 Eth
$791,330.00
62,416.960 LINK
0.5227%
36
Bitvavo
LINK-EUR$12.61
0.0070725 Eth
$657,564.00
52,159.035 LINK
0.4368%
37
FMCPAY
LINK-BTC$12.63
0.0070790 Eth
$586,308.00
46,039.500 LINK
0.3855%
38
tanX
LINK-USDC$12.62
0.0070770 Eth
$566,483.00
43,965.940 LINK
0.3682%
39
Coinbase Exchange
LINK-EUR$12.64
0.0070859 Eth
$516,420.00
40,867.340 LINK
0.3422%
40
Coinbase Exchange
LINK-BTC$12.63
0.0070826 Eth
$453,195.00
35,876.120 LINK
0.3004%
41
WhiteBIT
LINK-USDC$12.62
0.0070747 Eth
$417,997.00
33,123.680 LINK
0.2774%
42
CoinEx
LINK-USDT$12.62
0.0070737 Eth
$407,786.00
31,669.533 LINK
0.2652%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.63
0.0070731 Eth
$344,283.00
27,127.918 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2272%
44
Coinbase Exchange
LINK-GBP$12.57
0.0070483 Eth
$306,967.00
24,421.760 LINK
0.2045%
45
QMall
LINK-USDC$12.62
0.0070771 Eth
$293,156.00
22,779.005 LINK
0.1908%
46
BitMart
LINK-BTC$12.62
0.0070747 Eth
$287,686.00
22,800.620 LINK
0.1909%
47
EXMO
LINK-USDT$12.64
0.0070863 Eth
$259,787.00
20,557.075 LINK
0.1721%
48
BigONE
LINK-USDT$12.59
0.0070620 Eth
$258,920.00
20,568.540 LINK
0.1722%
49
Coinbase Exchange
LINK-USDT$12.61
0.0070717 Eth
$215,834.00
17,122.307 LINK
0.1434%
50
Slex
LINK-ETH$12.62
0.0070768 Eth
$207,591.00
16,357.540 LINK
0.1370%
51
OKX
LINK-USDC$12.63
0.0070832 Eth
$178,883.00
13,890.766 LINK
0.1163%
52
XT.COM
LINK-ETH$12.61
0.0070701 Eth
$177,182.00
13,956.830 LINK
0.1169%
53
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.59
0.0070511 Eth
$168,375.00
13,300.963 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1114%
54
WhiteBIT
LINK-TRY$12.70
0.0071210 Eth
$161,119.00
12,685.940 LINK
0.1062%
55
BitStorage
LINK-ETH$12.63
0.0070759 Eth
$158,178.00
12,523.450 LINK
0.1049%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.65
0.0070952 Eth
$131,409.00
10,247.818 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0858%
57
Bitbank
LINK-JPY$12.63
0.0070787 Eth
$130,968.00
10,373.584 LINK
0.0869%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.61
0.0070620 Eth
$104,948.00
8,263.367 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0692%
59
WhiteBIT
LINK-BTC$12.63
0.0070770 Eth
$99,689.00
7,892.730 LINK
0.0661%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.63
0.0070737 Eth
$95,979.00
7,547.142 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0632%
61
BitMart
LINK-ETH$12.61
0.0070715 Eth
$91,522.00
7,256.920 LINK
0.0608%
62
Binance US
LINK-USDT$12.62
0.0070789 Eth
$88,401.00
7,002.551 LINK
0.0586%
63
BYDFi
LINK-USDC$12.62
0.0070771 Eth
$79,653.00
6,310.830 LINK
0.0528%
64
Hotcoin
LINK-BTC$12.63
0.0070818 Eth
$72,832.00
5,766.910 LINK
0.0483%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.62
0.0070717 Eth
$60,644.00
4,780.326 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0400%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.55
0.0070317 Eth
$59,279.00
4,621.748 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0387%
67
bitcastle
LINK-USDT$12.63
0.0070790 Eth
$57,351.00
4,453.720 LINK
0.0373%
68
GMO Japan
LINK-JPY$12.64
0.0070788 Eth
$57,098.00
4,518.800 LINK
0.0378%
69
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.67
0.0070973 Eth
$47,941.00
48,753.756 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4083%
70
Aerodrome SlipStream
0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196-0X4200000000000000000000000000000000000006$12.60
0.0070658 Eth
$45,891.00
3,624.809 0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196
0.0304%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.68
0.0071017 Eth
$37,981.00
2,945.171 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0247%
72
Bittime
LINK-USDT$12.63
0.0070817 Eth
$30,442.00
2,364.360 LINK
0.0198%
73
Bittime
LINK-IDR$12.56
0.0070465 Eth
$30,402.00
2,375.450 LINK
0.0199%
74
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.58
0.0070484 Eth
$24,258.00
24,681.333 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2067%
75
Backpack Exchange
LINK-USDC$12.61
0.0070711 Eth
$23,673.00
1,837.112 LINK
0.0154%
76
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.63
0.0070751 Eth
$23,442.00
1,844.771 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0154%
77
Dex-Trade
LINK-ETH$12.62
0.0070762 Eth
$21,395.00
1,695.060 LINK
0.0142%
78
EXMO
LINK-BTC$12.66
0.0070994 Eth
$19,215.54
1,517.736 LINK
0.0127%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.65
0.0070850 Eth
$15,812.72
1,246.520 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0104%
80
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.63
0.0070798 Eth
$15,142.65
15,155.160 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1269%
81
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.59
0.0070585 Eth
$14,731.43
15,077.814 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1263%
82
Hotcoin
LINK-ETH$12.62
0.0070770 Eth
$12,859.25
1,018.910 LINK
0.0085%
83
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.57
0.0070447 Eth
$8,394.01
654.459 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0055%
84
Uniswap V4 (Ethereum)
0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.64
0.0070786 Eth
$8,284.02
8,453.625 0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A
0.0708%
85
Bitexen
LINK-TRY$12.55
0.0070320 Eth
$7,457.68
594.022 LINK
0.0050%
86
Oceanex
LINK-USDT$12.65
0.0070873 Eth
$7,155.28
565.600 LINK
0.0047%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.66
0.0070977 Eth
$4,572.67
4,641.651 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0389%
88
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$12.66
0.0070942 Eth
$4,504.05
7.020 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$12.57
0.0070494 Eth
$3,048.85
241.331 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0020%
90
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XAF88D065E77C8CC2239327C5EDB3A432268E5831$12.57
0.0070447 Eth
$2,548.43
198.533 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0017%
91
CoinEx
LINK-BTC$12.69
0.0071143 Eth
$2,523.85
197.610 LINK
0.0017%
92
CoinEx
LINK-USDC$12.65
0.0070957 Eth
$2,302.08
178.084 LINK
0.0015%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.61
0.0070748 Eth
$1,949.69
153.963 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0013%
94
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.60
0.0070573 Eth
$1,553.98
1,589.473 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0133%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.66
0.0070996 Eth
$1,359.66
105.413 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.62
0.0070765 Eth
$1,252.39
97.963 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0008%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.65
0.0070945 Eth
$998.07
78.579 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.64
0.0070882 Eth
$921.51
72.499 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$12.62
0.0070766 Eth
$572.51
44.296 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.64
0.0070860 Eth
$140.98
10.951 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%

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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