ETH Price: $2,687.34 (-3.66%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,940 ( -0.002%)

Market

Price

$16.64 @ 0.006192 ETH (-6.20%)

Onchain Market Cap

$16,640,000,000.00

Circulating Supply Market Cap

$10,624,164,666.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x353807396aa42b7fea5a98d1da7cebcdd6e0406a
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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 15027.27% |ETH 0.0003846 1509.98%

Market

Volume (24H):$436,910,179.00
Market Capitalization:$10,624,164,666.00
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
WhiteBIT
LINK-USDT$16.63
0.0061945 Eth
$47,964,924.00
2,884,892.430 LINK
17.8235%
2
Binance
LINK-USDT$16.64
0.0061927 Eth
$45,677,703.00
2,669,116.000 LINK
16.4903%
3
MEXC
LINK-USDT$16.64
0.0062018 Eth
$26,709,208.00
1,604,698.950 LINK
9.9142%
4
Coinbase Exchange
LINK-USD$16.66
0.0062079 Eth
$13,803,671.00
828,402.510 LINK
5.1180%
5
HTX
LINK-USDT$16.64
0.0061989 Eth
$13,211,135.00
767,230.589 LINK
4.7401%
6
Bybit
LINK-USDT$16.60
0.0061849 Eth
$9,843,885.00
577,464.151 LINK
3.5677%
7
P2B
LINK-USDT$16.60
0.0061816 Eth
$9,278,339.00
558,895.540 LINK
3.4530%
8
KuCoin
LINK-USDT$16.62
0.0061920 Eth
$7,264,832.00
437,065.521 LINK
2.7003%
9
Bitget
LINK-USDT$16.63
0.0061974 Eth
$6,772,277.00
397,259.122 LINK
2.4543%
10
Gate.io
LINK-USDT$16.63
0.0061939 Eth
$6,138,115.00
362,602.820 LINK
2.2402%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.66
0.0062086 Eth
$5,922,476.00
355,438.960 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1960%
12
DigiFinex
LINK-USDT$16.67
0.0062085 Eth
$5,498,450.00
329,915.350 LINK
2.0383%
13
OKX
LINK-USDT$16.62
0.0061918 Eth
$5,215,767.00
306,800.904 LINK
1.8955%
14
XT.COM
LINK-USDT$16.63
0.0061890 Eth
$4,546,867.00
265,696.560 LINK
1.6415%
15
MEXC
LINK-EUR$16.69
0.0062065 Eth
$4,497,776.00
269,550.540 LINK
1.6653%
16
MEXC
LINK-USDC$16.65
0.0061992 Eth
$4,343,960.00
260,919.750 LINK
1.6120%
17
Coinstore
LINK-USDT$16.59
0.0061806 Eth
$4,038,393.00
236,032.770 LINK
1.4583%
18
LBank
LINK-USDT$16.63
0.0061978 Eth
$3,918,543.00
235,609.690 LINK
1.4556%
19
Hotcoin
LINK-USDT$16.63
0.0061962 Eth
$3,750,596.00
225,510.240 LINK
1.3932%
20
Azbit
LINK-USDT$16.60
0.0061856 Eth
$2,750,167.00
160,712.030 LINK
0.9929%
21
Bitunix
LINK-USDT$16.62
0.0061918 Eth
$2,712,012.00
163,237.160 LINK
1.0085%
22
BTSE
LINK-USDT$16.58
0.0061751 Eth
$2,674,310.00
161,289.927 LINK
0.9965%
23
BYDFi
LINK-USDT$16.59
0.0061822 Eth
$2,469,650.00
148,850.180 LINK
0.9196%
24
LATOKEN
LINK-USDT$16.62
0.0061890 Eth
$2,148,930.00
129,290.040 LINK
0.7988%
25
FMCPAY
LINK-USDT$16.64
0.0062018 Eth
$2,025,152.00
117,826.977 LINK
0.7280%
26
QMall
LINK-USDT$16.60
0.0061856 Eth
$1,756,928.00
103,005.247 LINK
0.6364%
27
Dex-Trade
LINK-USDT$16.57
0.0061728 Eth
$1,455,306.00
87,839.186 LINK
0.5427%
28
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.59
0.0061795 Eth
$1,281,629.00
76,819.490 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4746%
29
Biconomy.com
LINK-USDT$16.61
0.0061893 Eth
$1,226,979.00
71,366.110 LINK
0.4409%
30
Bitvavo
LINK-EUR$16.64
0.0061948 Eth
$1,088,888.00
65,445.618 LINK
0.4043%
31
CoinEx
LINK-USDT$16.61
0.0061876 Eth
$992,027.00
58,002.560 LINK
0.3584%
32
Coinbase Exchange
LINK-EUR$16.62
0.0061913 Eth
$954,296.00
57,435.460 LINK
0.3548%
33
FMCPAY
LINK-BTC$16.60
0.0061841 Eth
$941,197.00
54,702.900 LINK
0.3380%
34
FMCPAY
LINK-ETH$16.60
0.0061834 Eth
$917,094.00
54,868.800 LINK
0.3390%
35
Coinbase Exchange
LINK-GBP$16.62
0.0061934 Eth
$711,426.00
42,803.630 LINK
0.2644%
36
PointPay
LINK-USDT$16.61
0.0061893 Eth
$651,800.00
38,309.269 LINK
0.2367%
37
tanX
LINK-USDC$16.60
0.0061858 Eth
$647,815.00
37,640.810 LINK
0.2326%
38
Bitbank
LINK-JPY$16.60
0.0061823 Eth
$617,006.00
37,161.611 LINK
0.2296%
39
EXMO
LINK-USDT$16.63
0.0061965 Eth
$530,212.00
31,878.097 LINK
0.1969%
40
BigONE
LINK-USDT$16.63
0.0061924 Eth
$476,359.00
28,642.440 LINK
0.1770%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$16.59
0.0061823 Eth
$409,408.00
24,070.684 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1487%
42
WhiteBIT
LINK-BTC$16.61
0.0061893 Eth
$404,984.00
24,378.800 LINK
0.1506%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.61
0.0061906 Eth
$397,223.00
23,531.171 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1454%
44
LATOKEN
LINK-BTC$16.60
0.0061843 Eth
$379,543.00
22,865.762 LINK
0.1413%
45
Gemini
LINK-USD$16.62
0.0061926 Eth
$337,908.00
20,330.184 LINK
0.1256%
46
XT.COM
LINK-ETH$16.61
0.0061802 Eth
$310,808.00
18,621.540 LINK
0.1150%
47
QMall
LINK-USDC$16.61
0.0061882 Eth
$309,675.00
18,202.116 LINK
0.1125%
48
BitMart
LINK-BTC$16.62
0.0061936 Eth
$277,612.00
16,701.200 LINK
0.1032%
49
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.59
0.0061812 Eth
$275,381.00
286,788.952 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7718%
50
BitStorage
LINK-ETH$16.61
0.0061879 Eth
$250,372.00
15,076.440 LINK
0.0931%
51
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.63
0.0061976 Eth
$237,197.00
14,246.043 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0880%
52
Slex
LINK-ETH$16.60
0.0061822 Eth
$234,523.00
14,012.310 LINK
0.0866%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.59
0.0061803 Eth
$231,437.00
13,474.640 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0832%
54
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$16.66
0.0062086 Eth
$225,011.00
26,191.386 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1618%
55
Bybit
LINK-USDC$16.61
0.0061875 Eth
$222,588.00
13,000.554 LINK
0.0803%
56
GMO Japan
LINK-JPY$16.63
0.0061957 Eth
$219,450.00
13,196.600 LINK
0.0815%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.69
0.0062214 Eth
$214,676.00
12,835.228 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0793%
58
Bitci TR
LINK-TRY$16.72
0.0062310 Eth
$174,146.00
10,065.310 LINK
0.0622%
59
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.68
0.0062172 Eth
$173,844.00
10,395.497 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0642%
60
BitDelta
LINK-USDT$16.60
0.0061855 Eth
$173,774.00
10,112.000 LINK
0.0625%
61
HashKey Exchange
LINK-USD$16.65
0.0062047 Eth
$165,724.00
9,699.104 LINK
0.0599%
62
Coinbase Exchange
LINK-ETH$16.74
0.0062334 Eth
$159,321.00
9,518.970 LINK
0.0588%
63
Coinbase Exchange
LINK-BTC$16.61
0.0061869 Eth
$154,330.00
9,293.940 LINK
0.0574%
64
CoinTR
LINK-TRY$16.66
0.0062080 Eth
$152,539.00
8,834.090 LINK
0.0546%
65
Bitkub
LINK-THB$16.60
0.0061797 Eth
$138,918.00
8,370.398 LINK
0.0517%
66
Kraken
LINK-GBP$16.61
0.0061863 Eth
$134,457.00
8,097.326 LINK
0.0500%
67
Hotcoin
LINK-BTC$16.71
0.0062159 Eth
$129,842.00
7,771.960 LINK
0.0480%
68
BYDFi
LINK-USDC$16.60
0.0061845 Eth
$116,246.00
7,002.440 LINK
0.0433%
69
OKX
LINK-USDC$16.57
0.0061735 Eth
$113,698.00
6,662.895 LINK
0.0412%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.60
0.0061846 Eth
$113,505.00
6,800.956 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0420%
71
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$16.69
0.0062179 Eth
$106,150.00
6,165.186 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0381%
72
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.47
0.0061372 Eth
$101,528.00
6,252.658 0X5947BB275C521040051D82396192181B413227A3
0.0386%
73
BitMart
LINK-ETH$16.61
0.0061892 Eth
$95,369.00
5,741.520 LINK
0.0355%
74
bitcastle
LINK-USDT$16.60
0.0061823 Eth
$93,850.00
5,494.810 LINK
0.0339%
75
KuCoin
LINK-USDC$16.59
0.0061815 Eth
$76,289.00
4,597.452 LINK
0.0284%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$16.56
0.0061705 Eth
$73,800.00
4,412.579 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0273%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$16.63
0.0061949 Eth
$70,341.00
4,107.697 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0254%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$16.59
0.0061795 Eth
$46,403.00
48,318.961 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2985%
79
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.68
0.0062149 Eth
$41,413.00
42,957.476 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2654%
80
Binance US
LINK-USDT$16.63
0.0061976 Eth
$40,718.00
2,447.880 LINK
0.0151%
81
Hotcoin
LINK-ETH$16.61
0.0061881 Eth
$36,401.00
2,191.980 LINK
0.0135%
82
EXMO
LINK-BTC$16.64
0.0062003 Eth
$35,395.00
2,126.765 LINK
0.0131%
83
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.68
0.0062149 Eth
$34,593.00
2,065.888 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0128%
84
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.58
0.0061755 Eth
$33,367.00
2,045.744 0X5947BB275C521040051D82396192181B413227A3
0.0126%
85
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$16.66
0.0062071 Eth
$32,497.00
33,451.632 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.2067%
86
Dex-Trade
LINK-ETH$16.58
0.0061784 Eth
$32,455.00
1,957.130 LINK
0.0121%
87
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.62
0.0061925 Eth
$29,815.00
1,800.535 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0111%
88
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$16.66
0.0062086 Eth
$26,512.00
1,553.368 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0096%
89
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.65
0.0062050 Eth
$16,145.81
985.995 0X5947BB275C521040051D82396192181B413227A3
0.0061%
90
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.62
0.0061936 Eth
$15,572.17
900.328 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0056%
91
CoinEx
LINK-BTC$16.57
0.0061771 Eth
$14,258.97
846.600 LINK
0.0052%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.60
0.0061852 Eth
$13,575.70
803.330 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0050%
93
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$16.54
0.0061653 Eth
$11,051.42
16.205 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$16.66
0.0062081 Eth
$10,157.00
596.969 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0037%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$16.62
0.0061918 Eth
$9,066.99
528.174 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0033%
96
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.60
0.0061858 Eth
$7,486.94
7,814.463 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0483%
97
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$16.62
0.0061934 Eth
$7,233.27
30.877 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$16.60
0.0061830 Eth
$7,018.60
405.051 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
99
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.68
0.0062142 Eth
$4,543.67
4,685.959 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0290%
100
Bitexen
LINK-TRY$16.47
0.0061354 Eth
$4,064.97
246.869 LINK
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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