ETH Price: $2,472.41 (+0.73%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,390 ( 0.002%)

Market

Price

$10.81 @ 0.004372 ETH (-1.58%)

Onchain Market Cap

$10,810,000,000.00

Circulating Supply Market Cap

$6,768,307,413.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x43dc3fa46dcb6d863728722c6f10fe8e133c5089
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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 9727.27% |ETH 0.0003846 1036.77%

Market

Volume (24H):$388,965,137.00
Market Capitalization:$6,768,307,413.00
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
WhiteBIT
LINK-USDT$10.81
0.0043682 Eth
$27,422,325.00
2,536,396.170 LINK
15.8971%
2
HTX
LINK-USDT$10.81
0.0043657 Eth
$11,048,419.00
1,023,166.087 LINK
6.4128%
3
Bitget
LINK-USDT$10.82
0.0043732 Eth
$9,665,132.00
894,943.775 LINK
5.6091%
4
Bybit
LINK-USDT$10.81
0.0043692 Eth
$7,667,038.00
711,474.344 LINK
4.4592%
5
Coinbase Exchange
LINK-USD$10.81
0.0043668 Eth
$7,256,896.00
671,313.220 LINK
4.2075%
6
OKX
LINK-USDT$10.81
0.0043679 Eth
$6,710,227.00
622,953.470 LINK
3.9044%
7
BTSE
LINK-USDT$10.81
0.0043705 Eth
$6,309,399.00
583,489.682 LINK
3.6571%
8
P2B
LINK-USDT$10.81
0.0043698 Eth
$5,994,838.00
554,368.820 LINK
3.4746%
9
Slex
LINK-USDT$10.80
0.0043661 Eth
$5,901,294.00
545,269.630 LINK
3.4175%
10
WEEX
LINK-USDT$10.80
0.0043655 Eth
$5,869,620.00
544,701.950 LINK
3.4140%
11
Ourbit
LINK-USDT$10.81
0.0043674 Eth
$5,275,859.00
489,374.840 LINK
3.0672%
12
Azbit
LINK-USDT$10.82
0.0043690 Eth
$5,194,363.00
480,468.500 LINK
3.0114%
13
Gate.io
LINK-USDT$10.81
0.0043676 Eth
$5,039,262.00
470,846.890 LINK
2.9511%
14
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.80
0.0043630 Eth
$4,720,334.00
433,667.849 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7181%
15
BVOX
LINK-USDT$10.80
0.0043677 Eth
$4,649,118.00
429,451.690 LINK
2.6916%
16
DigiFinex
LINK-USDT$10.81
0.0043662 Eth
$4,049,777.00
374,696.390 LINK
2.3484%
17
Biconomy.com
LINK-USDT$10.80
0.0043662 Eth
$3,815,495.00
353,185.190 LINK
2.2136%
18
Binance
LINK-ETH$10.78
0.0043621 Eth
$3,590,341.00
324,672.690 LINK
2.0349%
19
Bitunix
LINK-USDT$10.81
0.0043677 Eth
$3,301,949.00
305,571.510 LINK
1.9152%
20
CoinW
LINK-USDT$10.80
0.0043656 Eth
$2,961,100.00
274,071.530 LINK
1.7178%
21
XT.COM
LINK-USDT$10.80
0.0043656 Eth
$2,876,777.00
266,551.810 LINK
1.6706%
22
Hotcoin
LINK-USDT$10.78
0.0043617 Eth
$2,492,092.00
231,110.890 LINK
1.4485%
23
Trubit
LINK-USDT$10.79
0.0043595 Eth
$2,341,136.00
217,017.930 LINK
1.3602%
24
KuCoin
LINK-USDT$10.82
0.0043690 Eth
$2,293,469.00
212,056.577 LINK
1.3291%
25
LBank
LINK-USDT$10.79
0.0043607 Eth
$2,091,859.00
193,813.760 LINK
1.2147%
26
Coinstore
LINK-USDT$10.78
0.0043600 Eth
$2,084,707.00
193,244.260 LINK
1.2112%
27
AscendEX (BitMax)
LINK-USDT$10.80
0.0043646 Eth
$1,712,288.00
158,506.500 LINK
0.9935%
28
BYDFi
LINK-USDT$10.80
0.0043652 Eth
$1,421,643.00
131,673.130 LINK
0.8253%
29
WhiteBIT
LINK-BTC$10.80
0.0043625 Eth
$1,066,538.00
98,765.390 LINK
0.6190%
30
Nonkyc.io
LINK-USDT$10.83
0.0043781 Eth
$999,158.00
93,078.180 LINK
0.5834%
31
Dex-Trade
LINK-USDT$10.80
0.0043647 Eth
$962,843.00
89,126.240 LINK
0.5586%
32
XT.COM
LINK-ETH$10.79
0.0043601 Eth
$948,564.00
85,738.730 LINK
0.5374%
33
Azbit
LINK-ETH$10.81
0.0043682 Eth
$932,515.00
85,437.799 LINK
0.5355%
34
HashKey Global
LINK-USDT$10.82
0.0043733 Eth
$885,101.00
80,410.098 LINK
0.5040%
35
Bitvavo
LINK-EUR$10.81
0.0043695 Eth
$755,515.00
69,866.735 LINK
0.4379%
36
AscendEX (BitMax)
LINK-BTC$10.87
0.0043905 Eth
$594,445.00
54,703.200 LINK
0.3429%
37
EXMO
LINK-USDT$10.81
0.0043652 Eth
$570,271.00
52,775.181 LINK
0.3308%
38
LATOKEN
LINK-USDT$10.81
0.0043663 Eth
$567,541.00
52,524.834 LINK
0.3292%
39
BitStorage
LINK-ETH$10.81
0.0043676 Eth
$501,224.00
46,383.940 LINK
0.2907%
40
PointPay
LINK-USDT$10.83
0.0043730 Eth
$475,905.00
44,118.636 LINK
0.2765%
41
tanX
LINK-USDC$10.81
0.0043651 Eth
$447,160.00
41,357.970 LINK
0.2592%
42
CoinEx
LINK-USDT$10.79
0.0043634 Eth
$446,490.00
41,344.204 LINK
0.2591%
43
BigONE
LINK-USDT$10.84
0.0043807 Eth
$429,347.00
39,598.520 LINK
0.2482%
44
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.85
0.0043852 Eth
$425,509.00
39,124.231 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2452%
45
itBit
LINK-USD$10.80
0.0043669 Eth
$413,289.00
38,267.472 LINK
0.2398%
46
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.80
0.0043635 Eth
$376,237.00
34,279.338 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2148%
47
Bybit
LINK-USDC$10.82
0.0043702 Eth
$370,770.00
34,457.408 LINK
0.2160%
48
Hotcoin
LINK-ETH$10.81
0.0043671 Eth
$367,359.00
33,991.020 LINK
0.2130%
49
EarnBIT
LINK-USDT$10.81
0.0043671 Eth
$311,220.00
28,881.569 LINK
0.1810%
50
WhiteBIT
LINK-EUR$10.86
0.0043888 Eth
$307,238.00
28,280.460 LINK
0.1773%
51
Phemex
LINK-USDT$10.80
0.0043647 Eth
$293,026.00
27,124.140 LINK
0.1700%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.78
0.0043573 Eth
$265,684.00
24,512.911 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1536%
53
Slex
LINK-ETH$10.81
0.0043691 Eth
$199,551.00
18,293.910 LINK
0.1147%
54
BitMart
LINK-BTC$10.80
0.0043631 Eth
$195,543.00
18,104.560 LINK
0.1135%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.80
0.0043621 Eth
$161,966.00
15,002.302 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0940%
56
Bitbank
LINK-JPY$10.82
0.0043691 Eth
$160,241.00
14,816.030 LINK
0.0929%
57
Coinbase Exchange
LINK-EUR$10.82
0.0043731 Eth
$159,890.00
14,772.010 LINK
0.0926%
58
BitDelta
LINK-USDT$10.82
0.0043693 Eth
$141,587.00
13,130.000 LINK
0.0823%
59
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.81
0.0043663 Eth
$133,613.00
12,453.370 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0781%
60
Coinbase Exchange
LINK-GBP$10.80
0.0043621 Eth
$126,949.00
11,756.800 LINK
0.0737%
61
Coinbase Exchange
LINK-USDT$10.79
0.0043617 Eth
$116,906.00
10,830.819 LINK
0.0679%
62
BYDFi
LINK-USDC$10.82
0.0043705 Eth
$116,840.00
10,802.320 LINK
0.0677%
63
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.86
0.0043866 Eth
$115,598.00
10,595.095 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0664%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.79
0.0043576 Eth
$112,934.00
112,585.122 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.7056%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.78
0.0043561 Eth
$88,565.00
88,185.071 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5527%
66
OKX
LINK-USDC$10.80
0.0043649 Eth
$86,330.00
8,025.441 LINK
0.0503%
67
Slex
LINK-BTC$10.80
0.0043647 Eth
$82,115.00
7,524.000 LINK
0.0472%
68
GMO Japan
LINK-JPY$10.87
0.0043933 Eth
$72,832.00
6,698.000 LINK
0.0420%
69
Coinbase Exchange
LINK-BTC$10.80
0.0043645 Eth
$61,977.00
5,739.590 LINK
0.0360%
70
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.78
0.0043549 Eth
$52,027.00
4,868.135 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0305%
71
PointPay
LINK-BTC$10.79
0.0043610 Eth
$51,286.00
4,712.479 LINK
0.0295%
72
KuCoin
LINK-BTC$10.79
0.0043595 Eth
$49,158.00
4,555.130 LINK
0.0285%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.79
0.0043576 Eth
$44,766.00
4,164.463 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0261%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.76
0.0043511 Eth
$35,325.00
3,252.147 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0204%
75
KuCoin
LINK-USDC$10.79
0.0043604 Eth
$27,286.00
2,527.911 LINK
0.0158%
76
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.79
0.0043572 Eth
$26,210.00
26,194.706 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1642%
77
EXMO
LINK-BTC$10.80
0.0043642 Eth
$23,484.00
2,173.852 LINK
0.0136%
78
Binance US
LINK-USDT$10.80
0.0043641 Eth
$21,657.00
2,006.133 LINK
0.0126%
79
Bitso
LINK-USD$10.82
0.0043712 Eth
$20,948.00
1,935.897 LINK
0.0121%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.80
0.0043622 Eth
$19,927.09
1,831.600 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0115%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.81
0.0043671 Eth
$18,975.42
1,742.739 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0109%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.78
0.0043569 Eth
$16,945.19
1,561.038 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0098%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.78
0.0043561 Eth
$16,064.89
15,939.460 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0999%
84
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.89
0.0044017 Eth
$9,739.37
892.854 0X5947BB275C521040051D82396192181B413227A3
0.0056%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.78
0.0043573 Eth
$9,398.52
874.187 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0055%
86
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.82
0.0043762 Eth
$8,355.16
762.957 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0048%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.81
0.0043675 Eth
$5,814.08
541.322 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0034%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.84
0.0043806 Eth
$5,380.37
495.857 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0031%
89
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.88
0.0043941 Eth
$5,216.27
478.844 0X5947BB275C521040051D82396192181B413227A3
0.0030%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.79
0.0043582 Eth
$4,402.06
408.599 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0026%
91
CoinEx
LINK-BTC$10.82
0.0043775 Eth
$2,699.53
247.440 LINK
0.0016%
92
CoinEx
LINK-USDC$10.84
0.0043790 Eth
$2,448.11
225.694 LINK
0.0014%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.88
0.0043960 Eth
$1,608.76
147.693 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0009%
94
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.73
0.0043361 Eth
$995.32
226.757 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0014%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.88
0.0043960 Eth
$841.36
77.983 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
96
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.84
0.0043791 Eth
$408.03
37.518 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0002%
97
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.85
0.0043856 Eth
$405.58
31.551 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$10.80
0.0043639 Eth
$404.52
37.534 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$10.85
0.0043905 Eth
$358.30
33.052 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0002%
100
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.78
0.0043598 Eth
$281.88
589.401 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0037%

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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