ETH Price: $3,240.98 (-1.25%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,739 ( -0.001%)

Market

Price

$19.69 @ 0.006075 ETH (-3.17%)

Onchain Market Cap

$19,690,000,000.00

Circulating Supply Market Cap

$12,415,968,706.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
2.347031614440824637 LINK

Value
$46.21 ( ~0.0142580356023732 Eth) [0.0000%]
0x83b0c24dE0808567E46Fd64D696b14769a53Cbac
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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 17800% |ETH 0.0003846 1479.56%

Market

Volume (24H):$458,178,759.00
Market Capitalization:$12,415,968,706.00
Circulating Supply:631,099,972.00 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
Websea
LINK-USDT$19.65
0.0060686 Eth
$51,384,817.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$19.64
0.0060578 Eth
$48,698,425.00
2,429,939.560 LINK
20.3032%
3
Coinbase Exchange
LINK-USD$19.65
0.0060695 Eth
$15,704,045.00
799,310.070 LINK
6.6786%
4
WEEX
LINK-USDT$19.61
0.0060543 Eth
$10,507,412.00
524,109.450 LINK
4.3792%
5
P2B
LINK-USDT$19.65
0.0060656 Eth
$9,900,523.00
503,853.870 LINK
4.2099%
6
Slex
LINK-USDT$19.64
0.0060661 Eth
$8,057,743.00
402,065.830 LINK
3.3594%
7
Bitget
LINK-USDT$19.70
0.0060848 Eth
$7,973,019.00
398,344.793 LINK
3.3283%
8
BVOX
LINK-USDT$19.68
0.0060695 Eth
$7,639,405.00
380,948.580 LINK
3.1830%
9
Ourbit
LINK-USDT$19.65
0.0060704 Eth
$7,062,832.00
352,557.510 LINK
2.9458%
10
Bybit
LINK-USDT$19.66
0.0060733 Eth
$6,683,384.00
333,695.293 LINK
2.7882%
11
MEXC
LINK-USDT$19.67
0.0060603 Eth
$5,861,736.00
297,996.400 LINK
2.4899%
12
DigiFinex
LINK-USDT$19.66
0.0060725 Eth
$5,762,812.00
293,151.470 LINK
2.4494%
13
Deepcoin
LINK-USDT$19.66
0.0060699 Eth
$4,988,350.00
249,874.971 LINK
2.0878%
14
HTX
LINK-USDT$19.66
0.0060748 Eth
$4,868,525.00
243,003.413 LINK
2.0304%
15
Azbit
LINK-USDT$19.64
0.0060637 Eth
$4,865,040.00
242,717.336 LINK
2.0280%
16
FameEX
LINK-USDT$19.63
0.0060570 Eth
$4,857,283.00
242,527.009 LINK
2.0264%
17
XT.COM
LINK-USDT$19.66
0.0060751 Eth
$4,840,041.00
241,527.470 LINK
2.0181%
18
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.73
0.0060946 Eth
$4,763,263.00
240,075.084 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.0059%
19
OKX
LINK-USDT$19.66
0.0060719 Eth
$4,721,089.00
235,494.882 LINK
1.9677%
20
Coinstore
LINK-USDT$19.62
0.0060602 Eth
$4,455,582.00
222,448.160 LINK
1.8587%
21
Kraken
LINK-USD$19.67
0.0060770 Eth
$4,305,975.00
218,879.066 LINK
1.8288%
22
Binance
LINK-FDUSD$19.65
0.0060678 Eth
$4,252,718.00
212,304.270 LINK
1.7739%
23
CoinW
LINK-USDT$19.69
0.0060693 Eth
$3,864,769.00
196,243.430 LINK
1.6397%
24
Gate.io
LINK-USDT$19.66
0.0060717 Eth
$3,768,917.00
188,447.640 LINK
1.5746%
25
Bitunix
LINK-USDT$19.64
0.0060696 Eth
$3,413,152.00
173,792.990 LINK
1.4521%
26
Toobit
LINK-USDT$19.65
0.0060692 Eth
$3,111,866.00
155,291.610 LINK
1.2975%
27
BYDFi
LINK-USDT$19.69
0.0060677 Eth
$2,677,656.00
136,000.650 LINK
1.1363%
28
LATOKEN
LINK-USDT$19.68
0.0060592 Eth
$2,351,944.00
119,522.874 LINK
0.9987%
29
LBank
LINK-USDT$19.64
0.0060685 Eth
$2,300,904.00
117,159.290 LINK
0.9789%
30
Binance
LINK-USDC$19.64
0.0060678 Eth
$2,196,716.00
109,587.720 LINK
0.9157%
31
KuCoin
LINK-USDT$19.67
0.0060762 Eth
$2,159,387.00
109,806.643 LINK
0.9175%
32
QMall
LINK-USDT$19.65
0.0060680 Eth
$2,026,942.00
101,163.797 LINK
0.8453%
33
FMCPAY
LINK-USDT$19.65
0.0060663 Eth
$1,819,597.00
90,960.381 LINK
0.7600%
34
BTSE
LINK-USDT$19.65
0.0060662 Eth
$1,679,995.00
85,505.932 LINK
0.7144%
35
Dex-Trade
LINK-USDT$19.68
0.0060813 Eth
$1,514,625.00
76,968.560 LINK
0.6431%
36
Biconomy.com
LINK-USDT$19.65
0.0060718 Eth
$1,349,253.00
67,302.080 LINK
0.5623%
37
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.68
0.0060807 Eth
$1,112,325.00
55,928.885 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.4673%
38
CoinEx
LINK-USDT$19.65
0.0060707 Eth
$959,711.00
48,020.859 LINK
0.4012%
39
Coinbase Exchange
LINK-ETH$19.65
0.0060716 Eth
$893,395.00
45,467.180 LINK
0.3799%
40
tanX
LINK-USDC$19.66
0.0060744 Eth
$848,247.00
42,311.700 LINK
0.3535%
41
Bitvavo
LINK-EUR$19.67
0.0060664 Eth
$801,807.00
40,755.877 LINK
0.3405%
42
Coinbase Exchange
LINK-EUR$19.65
0.0060714 Eth
$801,675.00
40,800.970 LINK
0.3409%
43
PointPay
LINK-USDT$19.66
0.0060730 Eth
$780,619.00
38,964.231 LINK
0.3256%
44
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.70
0.0060864 Eth
$763,138.00
38,112.593 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.3184%
45
Azbit
LINK-ETH$19.64
0.0060660 Eth
$753,936.00
38,010.392 LINK
0.3176%
46
Pionex
LINK-USDT$19.65
0.0060681 Eth
$605,675.00
30,221.690 LINK
0.2525%
47
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.60
0.0060501 Eth
$483,863.00
24,403.877 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2039%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.65
0.0060724 Eth
$471,720.00
23,751.754 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1985%
49
EXMO
LINK-USDT$19.64
0.0060690 Eth
$400,488.00
20,390.630 LINK
0.1704%
50
Coinbase Exchange
LINK-GBP$19.66
0.0060741 Eth
$345,944.00
17,599.010 LINK
0.1470%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.67
0.0060724 Eth
$342,666.00
17,444.757 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1458%
52
Bitbank
LINK-JPY$19.71
0.0060862 Eth
$327,924.00
16,641.159 LINK
0.1390%
53
BigONE
LINK-USDT$19.70
0.0060810 Eth
$301,333.00
15,296.430 LINK
0.1278%
54
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.64
0.0060702 Eth
$281,641.00
286,976.455 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3978%
55
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.72
0.0060906 Eth
$272,877.00
20,248.602 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1692%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.71
0.0060879 Eth
$266,746.00
13,322.820 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1113%
57
BitMart
LINK-BTC$19.64
0.0060698 Eth
$260,567.00
13,263.960 LINK
0.1108%
58
Gemini
LINK-USD$19.72
0.0060927 Eth
$251,442.00
12,748.360 LINK
0.1065%
59
Coinbase Exchange
LINK-BTC$19.64
0.0060690 Eth
$214,765.00
10,933.980 LINK
0.0914%
60
Bitci TR
LINK-TRY$19.58
0.0060488 Eth
$201,268.00
10,015.180 LINK
0.0837%
61
QMall
LINK-USDC$19.66
0.0060708 Eth
$196,792.00
9,823.478 LINK
0.0821%
62
GMO Japan
LINK-JPY$19.80
0.0061168 Eth
$170,217.00
8,594.800 LINK
0.0718%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.62
0.0060586 Eth
$141,365.00
7,126.825 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0595%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.60
0.0060513 Eth
$137,642.00
140,717.217 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.1758%
65
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.70
0.0060814 Eth
$135,184.00
6,771.023 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0566%
66
OKX
LINK-USDC$19.66
0.0060718 Eth
$126,349.00
6,302.322 LINK
0.0527%
67
BitStorage
LINK-ETH$19.68
0.0060713 Eth
$125,162.00
6,360.650 LINK
0.0531%
68
bitcastle
LINK-USDT$19.64
0.0060632 Eth
$124,407.00
6,207.660 LINK
0.0519%
69
Kanga
LINK-PLN$19.80
0.0061124 Eth
$103,605.00
0.000 LINK
0.0000%
70
BitMart
LINK-ETH$19.63
0.0060654 Eth
$84,212.00
4,289.880 LINK
0.0358%
71
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.60
0.0060556 Eth
$76,874.00
3,892.693 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0325%
72
Hotcoin
LINK-BTC$19.64
0.0060635 Eth
$62,292.00
3,171.190 LINK
0.0265%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.66
0.0060693 Eth
$57,366.00
2,887.664 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0241%
74
Bitso
LINK-USD$19.65
0.0060708 Eth
$55,988.00
2,849.549 LINK
0.0238%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.60
0.0060513 Eth
$48,084.00
2,400.661 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0201%
76
EXMO
LINK-BTC$19.65
0.0060729 Eth
$45,716.00
2,326.117 LINK
0.0194%
77
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.67
0.0060749 Eth
$36,209.00
1,737.467 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0145%
78
Bitexen
LINK-TRY$19.47
0.0060081 Eth
$33,705.00
1,730.926 LINK
0.0145%
79
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.73
0.0060886 Eth
$31,468.00
1,585.842 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0133%
80
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.60
0.0060501 Eth
$27,357.00
27,969.981 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2337%
81
Gemini
LINK-BTC$19.67
0.0060749 Eth
$25,103.00
1,276.463 LINK
0.0107%
82
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.46
0.0060126 Eth
$24,276.00
1,235.582 0X5947BB275C521040051D82396192181B413227A3
0.0103%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.78
0.0061052 Eth
$16,920.73
860.744 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0072%
84
Dex-Trade
LINK-ETH$19.66
0.0060612 Eth
$16,266.47
827.520 LINK
0.0069%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.62
0.0060575 Eth
$10,384.00
518.564 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0043%
86
KuCoin
LINK-KCS$19.62
0.0060635 Eth
$8,192.68
417.473 LINK
0.0035%
87
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$19.72
0.0060906 Eth
$6,900.59
344.759 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0029%
88
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.58
0.0060487 Eth
$6,542.54
330.805 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0028%
89
CoinEx
LINK-USDC$19.68
0.0060747 Eth
$5,281.84
264.570 LINK
0.0022%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$19.68
0.0060752 Eth
$3,951.07
197.837 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0017%
91
Ace
LINK-USDT$19.63
0.0060619 Eth
$1,927.21
96.140 LINK
0.0008%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$19.76
0.0060959 Eth
$1,735.48
87.941 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
93
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.75
0.0060921 Eth
$1,599.71
5.577 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0000%
94
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.66
0.0060670 Eth
$807.13
40.634 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
95
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$19.53
0.0060336 Eth
$673.16
687.225 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0057%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$19.60
0.0060432 Eth
$645.40
32.580 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.59
0.0060448 Eth
$506.92
25.403 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
98
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$19.66
0.0060684 Eth
$404.85
20.323 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
99
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$19.57
0.0060399 Eth
$365.38
18.192 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0002%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$19.62
0.0060538 Eth
$185.92
9.287 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

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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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