ETH Price: $3,242.78 (-1.34%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,728 ( -0.001%)

Market

Price

$19.63 @ 0.006053 ETH (-3.40%)

Onchain Market Cap

$19,630,000,000.00

Circulating Supply Market Cap

$12,383,349,376.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
355.40262102 LINK

Value
$6,976.55 ( ~2.1514 Eth) [0.0000%]
0xB1f0cF3F18B5FDAa3F6bb279a77943f731AC346d
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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 17745.45% |ETH 0.0003846 1473.84%

Market

Volume (24H):$450,912,102.00
Market Capitalization:$12,383,349,376.00
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
Binance
LINK-USDT$19.66
0.0060646 Eth
$48,708,963.00
2,430,590.150 LINK
19.9710%
2
Coinbase Exchange
LINK-USD$19.68
0.0060726 Eth
$15,598,396.00
792,520.900 LINK
6.5118%
3
WEEX
LINK-USDT$19.61
0.0060543 Eth
$10,507,412.00
524,109.450 LINK
4.3064%
4
P2B
LINK-USDT$19.63
0.0060550 Eth
$9,896,632.00
504,036.150 LINK
4.1414%
5
Bitget
LINK-USDT$19.69
0.0060739 Eth
$8,021,035.00
400,613.271 LINK
3.2916%
6
BVOX
LINK-USDT$19.67
0.0060570 Eth
$7,631,395.00
380,596.150 LINK
3.1272%
7
Ourbit
LINK-USDT$19.61
0.0060574 Eth
$7,094,561.00
353,805.360 LINK
2.9070%
8
Bybit
LINK-USDT$19.66
0.0060655 Eth
$6,765,601.00
337,739.414 LINK
2.7750%
9
Poloniex
LINK-USDT$19.65
0.0060639 Eth
$6,643,043.00
331,142.338 LINK
2.7208%
10
MEXC
LINK-USDT$19.67
0.0060603 Eth
$5,861,736.00
297,996.400 LINK
2.4485%
11
DigiFinex
LINK-USDT$19.66
0.0060656 Eth
$5,798,528.00
294,949.880 LINK
2.4235%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.75
0.0060947 Eth
$5,269,565.00
265,151.700 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1786%
13
Deepcoin
LINK-USDT$19.64
0.0060581 Eth
$4,964,185.00
249,874.971 LINK
2.0531%
14
XT.COM
LINK-USDT$19.62
0.0060586 Eth
$4,895,053.00
244,028.170 LINK
2.0051%
15
Azbit
LINK-USDT$19.61
0.0060488 Eth
$4,859,750.00
242,475.927 LINK
1.9923%
16
FameEX
LINK-USDT$19.63
0.0060570 Eth
$4,857,283.00
242,527.009 LINK
1.9927%
17
HTX
LINK-USDT$19.69
0.0060753 Eth
$4,850,879.00
242,090.573 LINK
1.9891%
18
OKX
LINK-USDT$19.66
0.0060656 Eth
$4,764,175.00
237,575.601 LINK
1.9520%
19
Coinstore
LINK-USDT$19.59
0.0060563 Eth
$4,505,388.00
224,724.220 LINK
1.8464%
20
Kraken
LINK-USD$19.65
0.0060632 Eth
$4,361,054.00
221,919.666 LINK
1.8234%
21
Binance
LINK-FDUSD$19.70
0.0060771 Eth
$4,338,410.00
216,155.250 LINK
1.7760%
22
CoinW
LINK-USDT$19.71
0.0060712 Eth
$3,862,676.00
195,930.770 LINK
1.6099%
23
Gate.io
LINK-USDT$19.65
0.0060621 Eth
$3,790,819.00
189,516.660 LINK
1.5572%
24
Bitunix
LINK-USDT$19.62
0.0060433 Eth
$3,424,695.00
174,546.620 LINK
1.4342%
25
Toobit
LINK-USDT$19.69
0.0060610 Eth
$3,123,841.00
155,849.020 LINK
1.2805%
26
BYDFi
LINK-USDT$19.68
0.0060594 Eth
$2,693,181.00
136,869.090 LINK
1.1246%
27
LATOKEN
LINK-USDT$19.68
0.0060592 Eth
$2,351,944.00
119,522.874 LINK
0.9821%
28
LBank
LINK-USDT$19.62
0.0060468 Eth
$2,303,323.00
117,403.260 LINK
0.9646%
29
Binance
LINK-USDC$19.65
0.0060691 Eth
$2,294,812.00
114,371.160 LINK
0.9397%
30
KuCoin
LINK-USDT$19.63
0.0060560 Eth
$2,153,386.00
109,708.542 LINK
0.9014%
31
QMall
LINK-USDT$19.68
0.0060579 Eth
$2,011,815.00
100,389.744 LINK
0.8249%
32
FMCPAY
LINK-USDT$19.65
0.0060618 Eth
$1,820,228.00
90,986.481 LINK
0.7476%
33
Hotcoin
LINK-USDT$19.62
0.0060484 Eth
$1,817,140.00
92,628.610 LINK
0.7611%
34
Binance
LINK-BTC$19.62
0.0060604 Eth
$1,811,585.00
90,781.850 LINK
0.7459%
35
BTSE
LINK-USDT$19.65
0.0060627 Eth
$1,668,082.00
84,889.821 LINK
0.6975%
36
Dex-Trade
LINK-USDT$19.67
0.0060638 Eth
$1,520,234.00
77,296.960 LINK
0.6351%
37
Biconomy.com
LINK-USDT$19.67
0.0060591 Eth
$1,352,671.00
67,469.400 LINK
0.5544%
38
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.61
0.0060401 Eth
$1,128,464.00
56,825.864 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.4669%
39
CoinEx
LINK-USDT$19.55
0.0060394 Eth
$934,844.00
46,736.147 LINK
0.3840%
40
Coinbase Exchange
LINK-ETH$19.66
0.0060552 Eth
$888,191.00
45,166.960 LINK
0.3711%
41
tanX
LINK-USDC$19.70
0.0060650 Eth
$847,356.00
42,264.750 LINK
0.3473%
42
Bitvavo
LINK-EUR$19.68
0.0060624 Eth
$802,176.00
40,764.741 LINK
0.3349%
43
Coinbase Exchange
LINK-EUR$19.71
0.0060686 Eth
$797,409.00
40,460.820 LINK
0.3324%
44
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.60
0.0060470 Eth
$786,398.00
39,255.325 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.3225%
45
PointPay
LINK-USDT$19.67
0.0060604 Eth
$774,611.00
38,672.938 LINK
0.3178%
46
Azbit
LINK-ETH$19.68
0.0060575 Eth
$758,017.00
38,119.977 LINK
0.3132%
47
Pionex
LINK-USDT$19.68
0.0060708 Eth
$609,913.00
30,432.310 LINK
0.2500%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.64
0.0060470 Eth
$494,648.00
24,875.841 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2044%
49
FMFW.io
LINK-USDT$19.63
0.0060471 Eth
$489,491.00
24,937.860 LINK
0.2049%
50
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.63
0.0060458 Eth
$484,824.00
24,412.336 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2006%
51
EXMO
LINK-USDT$19.66
0.0060643 Eth
$400,933.00
20,398.306 LINK
0.1676%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.60
0.0060392 Eth
$348,613.00
17,817.630 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1464%
53
Coinbase Exchange
LINK-GBP$19.69
0.0060644 Eth
$341,845.00
17,357.220 LINK
0.1426%
54
Bitbank
LINK-JPY$19.75
0.0060794 Eth
$329,608.00
16,692.257 LINK
0.1372%
55
BigONE
LINK-USDT$19.64
0.0060610 Eth
$299,262.00
15,233.990 LINK
0.1252%
56
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.67
0.0060586 Eth
$284,951.00
290,092.026 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3835%
57
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.63
0.0060559 Eth
$271,635.00
20,248.602 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1664%
58
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.71
0.0060766 Eth
$270,814.00
13,527.013 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1111%
59
BitMart
LINK-BTC$19.66
0.0060638 Eth
$259,742.00
13,209.340 LINK
0.1085%
60
Gemini
LINK-USD$19.69
0.0060752 Eth
$252,834.00
12,840.328 LINK
0.1055%
61
Coinbase Exchange
LINK-BTC$19.68
0.0060618 Eth
$207,862.00
10,564.180 LINK
0.0868%
62
Bitci TR
LINK-TRY$19.79
0.0060955 Eth
$200,993.00
9,997.390 LINK
0.0821%
63
QMall
LINK-USDC$19.69
0.0060631 Eth
$193,947.00
9,679.521 LINK
0.0795%
64
GMO Japan
LINK-JPY$19.81
0.0060979 Eth
$180,523.00
9,114.500 LINK
0.0749%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.61
0.0060401 Eth
$160,297.00
8,083.383 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0664%
66
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.61
0.0060401 Eth
$142,113.00
145,304.773 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.1939%
67
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.73
0.0060766 Eth
$132,873.00
6,631.204 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0545%
68
OKX
LINK-USDC$19.66
0.0060650 Eth
$126,703.00
6,321.370 LINK
0.0519%
69
BitStorage
LINK-ETH$19.68
0.0060713 Eth
$125,162.00
6,360.650 LINK
0.0523%
70
bitcastle
LINK-USDT$19.65
0.0060618 Eth
$123,870.00
6,181.090 LINK
0.0508%
71
Kanga
LINK-PLN$19.73
0.0060839 Eth
$103,525.00
0.000 LINK
0.0000%
72
LATOKEN
LINK-BTC$19.66
0.0060624 Eth
$91,643.00
4,661.697 LINK
0.0383%
73
BitMart
LINK-ETH$19.66
0.0060628 Eth
$83,324.00
4,237.380 LINK
0.0348%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.61
0.0060519 Eth
$79,810.00
4,032.947 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0331%
75
Hotcoin
LINK-BTC$19.61
0.0060595 Eth
$60,502.00
3,084.980 LINK
0.0253%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.64
0.0060508 Eth
$58,470.00
2,942.789 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0242%
77
Bitso
LINK-USD$19.69
0.0060669 Eth
$57,131.00
2,901.250 LINK
0.0238%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.61
0.0060401 Eth
$49,470.00
2,468.566 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0203%
79
EXMO
LINK-BTC$19.67
0.0060681 Eth
$45,878.00
2,332.710 LINK
0.0192%
80
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.70
0.0060655 Eth
$37,494.00
1,798.263 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0148%
81
Bitexen
LINK-TRY$19.47
0.0060081 Eth
$33,705.00
1,730.926 LINK
0.0142%
82
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.76
0.0060842 Eth
$32,630.00
1,641.290 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0135%
83
BTCMarkets
LINK-AUD$19.60
0.0060372 Eth
$30,014.00
1,531.645 LINK
0.0126%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.63
0.0060458 Eth
$28,061.00
28,649.241 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2354%
85
Gemini
LINK-BTC$19.68
0.0060711 Eth
$25,264.00
1,283.930 LINK
0.0105%
86
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.47
0.0059940 Eth
$24,288.00
1,235.582 0X5947BB275C521040051D82396192181B413227A3
0.0102%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.70
0.0060679 Eth
$18,228.95
930.716 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0076%
88
Dex-Trade
LINK-ETH$19.64
0.0060592 Eth
$16,330.19
831.530 LINK
0.0068%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.62
0.0060463 Eth
$10,758.25
536.937 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0044%
90
TokoCrypto
LINK-USDT$19.68
0.0060592 Eth
$9,063.70
460.606 LINK
0.0038%
91
KuCoin
LINK-KCS$19.65
0.0060641 Eth
$8,245.37
419.514 LINK
0.0034%
92
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$19.70
0.0060783 Eth
$7,552.90
377.211 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0031%
93
CoinEx
LINK-USDC$19.61
0.0060518 Eth
$5,280.19
264.575 LINK
0.0022%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$19.76
0.0060959 Eth
$1,735.48
87.941 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
95
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.66
0.0060670 Eth
$807.13
40.634 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
96
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$19.58
0.0060286 Eth
$674.88
687.225 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0056%
97
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$19.60
0.0060432 Eth
$645.40
32.580 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%
98
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$19.66
0.0060709 Eth
$404.93
20.323 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
99
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$19.56
0.0060476 Eth
$355.79
17.740 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0001%
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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