ETH Price: $2,439.31 (-2.22%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,313 ( 0.000%)

Market

Price

$11.24 @ 0.004608 ETH (-2.88%)

Onchain Market Cap

$11,240,000,000.00

Circulating Supply Market Cap

$7,035,300,659.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xe54235fc70dda5c1661cb179bf2a408aa1512d51
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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 10118.18% |ETH 0.0003846 1098.13%

Market

Volume (24H):$410,580,006.00
Market Capitalization:$7,035,300,659.00
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$11.24
0.0046112 Eth
$32,401,247.00
2,883,162.930 LINK
15.0280%
2
Binance
LINK-USDT$11.24
0.0046055 Eth
$30,845,440.00
2,703,133.290 LINK
14.0896%
3
WhiteBIT
LINK-USDT$11.23
0.0046096 Eth
$19,790,833.00
1,761,874.400 LINK
9.1835%
4
Coinbase Exchange
LINK-USD$11.23
0.0046072 Eth
$19,203,883.00
1,709,595.240 LINK
8.9110%
5
Bybit
LINK-USDT$11.23
0.0046088 Eth
$13,363,474.00
1,169,301.725 LINK
6.0948%
6
HTX
LINK-USDT$11.23
0.0046099 Eth
$12,268,030.00
1,075,782.129 LINK
5.6073%
7
Bitget
LINK-USDT$11.23
0.0046096 Eth
$9,151,187.00
801,276.313 LINK
4.1765%
8
P2B
LINK-USDT$11.23
0.0046077 Eth
$5,910,188.00
526,403.190 LINK
2.7438%
9
Slex
LINK-USDT$11.24
0.0046114 Eth
$5,461,907.00
478,480.420 LINK
2.4940%
10
Azbit
LINK-USDT$11.23
0.0046082 Eth
$5,203,094.00
455,596.230 LINK
2.3747%
11
BTSE
LINK-USDT$11.23
0.0046081 Eth
$4,182,485.00
372,491.945 LINK
1.9416%
12
OKX
LINK-USDT$11.23
0.0046096 Eth
$3,997,473.00
349,764.969 LINK
1.8231%
13
DigiFinex
LINK-USDT$11.24
0.0046113 Eth
$3,779,722.00
336,325.200 LINK
1.7530%
14
Biconomy.com
LINK-USDT$11.24
0.0046125 Eth
$3,562,338.00
312,027.090 LINK
1.6264%
15
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.23
0.0046089 Eth
$3,374,233.00
298,043.982 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.5535%
16
ProBit Global
LINK-USDT$11.23
0.0046066 Eth
$2,972,754.00
264,793.397 LINK
1.3802%
17
XT.COM
LINK-USDT$11.23
0.0046073 Eth
$2,867,486.00
251,295.690 LINK
1.3098%
18
Upbit
LINK-KRW$11.25
0.0046159 Eth
$2,552,627.00
226,908.763 LINK
1.1827%
19
KuCoin
LINK-USDT$11.24
0.0046114 Eth
$2,491,706.00
221,713.751 LINK
1.1556%
20
Trubit
LINK-USDT$11.24
0.0046115 Eth
$2,442,063.00
213,458.810 LINK
1.1126%
21
CoinW
LINK-USDT$11.23
0.0046087 Eth
$2,298,996.00
204,718.530 LINK
1.0671%
22
Coinstore
LINK-USDT$11.23
0.0046063 Eth
$1,948,677.00
170,809.790 LINK
0.8903%
23
AscendEX (BitMax)
LINK-USDT$11.27
0.0046225 Eth
$1,687,500.00
149,792.400 LINK
0.7808%
24
BYDFi
LINK-USDT$11.24
0.0046088 Eth
$1,464,275.00
130,302.440 LINK
0.6792%
25
Bitunix
LINK-USDT$11.24
0.0046094 Eth
$1,376,323.00
122,432.060 LINK
0.6382%
26
FameEX
LINK-USDT$11.23
0.0046092 Eth
$1,229,129.00
107,713.247 LINK
0.5614%
27
Hotcoin
LINK-USDT$11.23
0.0046051 Eth
$1,185,851.00
105,618.840 LINK
0.5505%
28
FMCPAY
LINK-USDT$11.23
0.0046073 Eth
$1,027,977.00
90,048.450 LINK
0.4694%
29
Dex-Trade
LINK-USDT$11.24
0.0046118 Eth
$1,018,216.00
90,608.140 LINK
0.4723%
30
WhiteBIT
LINK-BTC$11.23
0.0046097 Eth
$989,526.00
88,090.080 LINK
0.4592%
31
LATOKEN
LINK-USDT$11.23
0.0046076 Eth
$966,486.00
86,079.477 LINK
0.4487%
32
Bitvavo
LINK-EUR$11.25
0.0046160 Eth
$897,634.00
79,795.830 LINK
0.4159%
33
HashKey Global
LINK-USDT$11.24
0.0046094 Eth
$888,156.00
78,088.896 LINK
0.4070%
34
Azbit
LINK-ETH$11.24
0.0046127 Eth
$886,887.00
78,446.309 LINK
0.4089%
35
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.20
0.0045957 Eth
$681,654.00
60,527.067 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3155%
36
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.22
0.0046049 Eth
$612,283.00
54,312.856 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2831%
37
Kraken
LINK-USDT$11.26
0.0046222 Eth
$607,069.00
53,897.428 LINK
0.2809%
38
FMCPAY
LINK-BTC$11.23
0.0046073 Eth
$590,128.00
52,208.900 LINK
0.2721%
39
CoinEx
LINK-USDT$11.23
0.0046093 Eth
$562,154.00
49,313.655 LINK
0.2570%
40
FMCPAY
LINK-ETH$11.24
0.0046126 Eth
$552,667.00
48,878.560 LINK
0.2548%
41
AscendEX (BitMax)
LINK-BTC$11.21
0.0046009 Eth
$551,352.00
49,171.200 LINK
0.2563%
42
tanX
LINK-USDC$11.22
0.0046239 Eth
$551,202.00
48,223.020 LINK
0.2514%
43
BigONE
LINK-USDT$11.26
0.0046198 Eth
$507,121.00
45,048.920 LINK
0.2348%
44
PointPay
LINK-USDT$11.23
0.0046032 Eth
$505,473.00
44,317.499 LINK
0.2310%
45
LATOKEN
LINK-BTC$11.23
0.0046081 Eth
$470,357.00
41,886.869 LINK
0.2183%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.22
0.0046060 Eth
$428,492.00
38,105.676 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1986%
47
WhiteBIT
LINK-EUR$11.25
0.0046154 Eth
$391,093.00
34,773.320 LINK
0.1813%
48
EXMO
LINK-USDT$11.23
0.0046073 Eth
$359,479.00
32,019.923 LINK
0.1669%
49
Gemini
LINK-USD$11.22
0.0046062 Eth
$357,467.00
31,845.974 LINK
0.1660%
50
Bithumb
LINK-KRW$11.23
0.0046104 Eth
$350,808.00
31,225.251 LINK
0.1628%
51
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.26
0.0046196 Eth
$331,648.00
29,420.823 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1534%
52
Phemex
LINK-USDT$11.24
0.0046110 Eth
$320,690.00
28,536.270 LINK
0.1487%
53
Bybit
LINK-USDC$11.24
0.0046104 Eth
$307,446.00
26,853.733 LINK
0.1400%
54
ProBit Global
LINK-BTC$11.22
0.0046055 Eth
$249,132.00
22,196.035 LINK
0.1157%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.23
0.0046070 Eth
$209,011.00
18,474.866 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0963%
56
BitMart
LINK-BTC$11.23
0.0046081 Eth
$179,756.00
16,006.040 LINK
0.0834%
57
Bitbank
LINK-JPY$11.24
0.0046130 Eth
$149,477.00
13,295.817 LINK
0.0693%
58
BitDelta
LINK-USDT$11.23
0.0046076 Eth
$145,306.00
12,731.000 LINK
0.0664%
59
Hotcoin
LINK-BTC$11.25
0.0046124 Eth
$123,596.00
10,990.680 LINK
0.0573%
60
Hotcoin
LINK-ETH$11.25
0.0046127 Eth
$121,153.00
10,772.590 LINK
0.0562%
61
BYDFi
LINK-USDC$11.22
0.0046032 Eth
$116,069.00
10,341.230 LINK
0.0539%
62
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.23
0.0046066 Eth
$112,752.00
9,903.147 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0516%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.28
0.0046278 Eth
$99,344.00
100,749.748 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5251%
64
Slex
LINK-BTC$11.23
0.0046081 Eth
$97,067.00
8,576.500 LINK
0.0447%
65
WhiteBIT
LINK-TRY$11.28
0.0046310 Eth
$97,010.00
8,596.430 LINK
0.0448%
66
Coinbase Exchange
LINK-ETH$11.25
0.0046148 Eth
$94,927.00
8,440.370 LINK
0.0440%
67
Bitso
LINK-USD$11.24
0.0046101 Eth
$81,358.00
7,241.195 LINK
0.0377%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.23
0.0046082 Eth
$68,083.00
5,945.422 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0310%
69
PointPay
LINK-BTC$11.25
0.0046115 Eth
$64,630.00
5,709.543 LINK
0.0298%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.28
0.0046278 Eth
$59,175.00
5,178.533 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0270%
71
Slex
LINK-ETH$11.26
0.0046206 Eth
$59,118.00
5,226.340 LINK
0.0272%
72
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.26
0.0046198 Eth
$44,870.00
45,322.477 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2362%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.25
0.0046152 Eth
$38,498.00
3,402.275 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0177%
74
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.24
0.0046131 Eth
$36,964.00
3,250.864 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0169%
75
EXMO
LINK-BTC$11.25
0.0046155 Eth
$34,764.00
3,090.495 LINK
0.0161%
76
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.22
0.0046049 Eth
$29,456.00
29,992.195 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1563%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.19
0.0045942 Eth
$27,323.00
2,427.684 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0127%
78
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.21
0.0046002 Eth
$26,039.00
2,317.633 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0121%
79
OKX
LINK-USDC$11.23
0.0046072 Eth
$24,925.00
2,179.454 LINK
0.0114%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.24
0.0046136 Eth
$19,064.66
1,664.612 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0087%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.25
0.0046179 Eth
$15,795.91
1,399.023 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0073%
82
Binance US
LINK-USDT$11.25
0.0046151 Eth
$15,207.73
1,352.039 LINK
0.0070%
83
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.24
0.0046113 Eth
$14,697.19
24.089 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
84
KuCoin
LINK-KCS$11.25
0.0046144 Eth
$10,087.32
896.994 LINK
0.0047%
85
Coinone
LINK-KRW$11.23
0.0046072 Eth
$9,314.28
829.608 LINK
0.0043%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.26
0.0046196 Eth
$9,165.66
9,243.975 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0482%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.28
0.0046290 Eth
$6,319.16
547.275 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0029%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.28
0.0046272 Eth
$6,228.84
549.513 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0029%
89
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.22
0.0046053 Eth
$2,580.34
225.729 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0012%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.24
0.0046091 Eth
$2,409.20
210.547 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0011%
91
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.20
0.0045971 Eth
$2,304.72
204.583 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0011%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.27
0.0046248 Eth
$2,259.50
197.485 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
93
CoinEx
LINK-USDC$11.26
0.0046193 Eth
$2,225.28
194.884 LINK
0.0010%
94
CoinEx
LINK-BTC$11.19
0.0045911 Eth
$1,925.15
170.518 LINK
0.0009%
95
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.25
0.0046155 Eth
$1,838.77
163.086 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0009%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.28
0.0046290 Eth
$1,356.68
117.393 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$11.22
0.0046006 Eth
$588.91
53.057 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
98
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$11.22
0.0046051 Eth
$249.73
21.896 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0001%
99
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.26
0.0046196 Eth
$164.57
296.626 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0015%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$11.28
0.0046248 Eth
$108.26
9.440 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
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

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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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