ETH Price: $2,640.12 (-1.07%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,557 (0.00%)

Market

Price

$12.35 @ 0.004678 ETH (-3.59%)

Onchain Market Cap

$12,350,000,000.00

Circulating Supply Market Cap

$7,730,662,026.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
MEV Bot: 0x0d3...ad5
Balance
0.000000000000000001 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0x0d3c2261747b2079f6abd459642421a8087aead5
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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 11127.27% |ETH 0.0003846 1116.33%

Market

Volume (24H):$316,287,757.00
Market Capitalization:$7,730,662,026.00
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$12.33
0.0046724 Eth
$32,990,255.00
2,676,618.200 LINK
18.4432%
2
Binance
LINK-USDT$12.36
0.0046759 Eth
$19,543,365.00
1,552,188.320 LINK
10.6953%
3
WhiteBIT
LINK-USDT$12.35
0.0046709 Eth
$12,681,256.00
1,026,602.900 LINK
7.0738%
4
Bybit
LINK-USDT$12.37
0.0046786 Eth
$11,981,539.00
950,918.738 LINK
6.5523%
5
Coinbase Exchange
LINK-USD$12.33
0.0046708 Eth
$10,529,780.00
853,858.220 LINK
5.8835%
6
HTX
LINK-USDT$12.37
0.0046787 Eth
$9,450,293.00
749,447.661 LINK
5.1641%
7
Bitget
LINK-USDT$12.37
0.0046800 Eth
$9,001,976.00
713,623.036 LINK
4.9172%
8
Websea
LINK-USDT$12.34
0.0046719 Eth
$8,748,092.00
0.000 LINK
0.0000%
9
Azbit
LINK-USDT$12.33
0.0046653 Eth
$6,304,206.00
499,790.230 LINK
3.4438%
10
WEEX
LINK-USDT$12.37
0.0046769 Eth
$5,708,353.00
452,918.540 LINK
3.1208%
11
Biconomy.com
LINK-USDT$12.34
0.0046742 Eth
$5,170,480.00
409,927.750 LINK
2.8246%
12
BVOX
LINK-USDT$12.34
0.0046744 Eth
$4,008,424.00
318,054.540 LINK
2.1916%
13
P2B
LINK-USDT$12.33
0.0046671 Eth
$3,896,470.00
315,989.260 LINK
2.1773%
14
Slex
LINK-USDT$12.35
0.0046702 Eth
$3,197,459.00
253,711.170 LINK
1.7482%
15
OKX
LINK-USDT$12.36
0.0046727 Eth
$3,008,055.00
238,667.664 LINK
1.6445%
16
Upbit
LINK-KRW$12.34
0.0046664 Eth
$2,486,966.00
201,568.335 LINK
1.3889%
17
DigiFinex
LINK-USDT$12.37
0.0046785 Eth
$2,430,073.00
196,459.160 LINK
1.3537%
18
Deepcoin
LINK-USDT$12.32
0.0046648 Eth
$2,324,369.00
178,969.100 LINK
1.2332%
19
KuCoin
LINK-USDT$12.37
0.0046790 Eth
$2,265,512.00
183,134.508 LINK
1.2619%
20
ProBit Global
LINK-USDT$12.33
0.0046704 Eth
$2,174,499.00
176,355.962 LINK
1.2152%
21
Trubit
LINK-USDT$12.34
0.0046744 Eth
$2,035,662.00
161,494.780 LINK
1.1128%
22
Binance
LINK-BTC$12.31
0.0046638 Eth
$2,030,617.00
162,444.520 LINK
1.1193%
23
XT.COM
LINK-USDT$12.33
0.0046751 Eth
$1,794,473.00
142,528.610 LINK
0.9821%
24
AscendEX (BitMax)
LINK-USDT$12.39
0.0046852 Eth
$1,685,968.00
136,129.800 LINK
0.9380%
25
Gate.io
LINK-USDT$12.36
0.0046754 Eth
$1,627,066.00
129,259.400 LINK
0.8907%
26
C-Patex
LINK-USDT$12.34
0.0046656 Eth
$1,610,272.00
130,536.985 LINK
0.8995%
27
Crypto.com Exchange
LINK-USDT$12.37
0.0046770 Eth
$1,461,803.00
118,211.820 LINK
0.8145%
28
CoinW
LINK-USDT$12.33
0.0046691 Eth
$1,388,801.00
112,612.710 LINK
0.7760%
29
Kraken
LINK-USD$12.36
0.0046736 Eth
$1,261,554.00
102,093.855 LINK
0.7035%
30
Azbit
LINK-ETH$12.34
0.0046669 Eth
$1,070,042.00
85,366.636 LINK
0.5882%
31
FMCPAY
LINK-USDT$12.33
0.0046698 Eth
$1,038,750.00
82,494.579 LINK
0.5684%
32
BYDFi
LINK-USDT$12.28
0.0046569 Eth
$953,018.00
77,592.610 LINK
0.5347%
33
Bitvavo
LINK-EUR$12.34
0.0046665 Eth
$785,427.00
63,658.278 LINK
0.4386%
34
HashKey Global
LINK-USDT$12.37
0.0046781 Eth
$693,608.00
54,810.987 LINK
0.3777%
35
Kraken
LINK-USDT$12.32
0.0046613 Eth
$668,528.00
54,244.265 LINK
0.3738%
36
Dex-Trade
LINK-USDT$12.36
0.0046765 Eth
$642,004.00
51,923.060 LINK
0.3578%
37
Bybit
LINK-USDC$12.35
0.0046707 Eth
$629,925.00
49,940.436 LINK
0.3441%
38
HitBTC
LINK-USDT$12.36
0.0046778 Eth
$614,911.00
48,726.360 LINK
0.3357%
39
FMFW.io
LINK-USDT$12.36
0.0046736 Eth
$602,278.00
48,728.670 LINK
0.3358%
40
FMCPAY
LINK-BTC$12.33
0.0046666 Eth
$570,395.00
45,527.800 LINK
0.3137%
41
tanX
LINK-USDC$12.45
0.0046861 Eth
$529,057.00
41,929.900 LINK
0.2889%
42
FMCPAY
LINK-ETH$12.33
0.0046664 Eth
$512,411.00
40,893.600 LINK
0.2818%
43
EXMO
LINK-USDT$12.38
0.0046818 Eth
$407,471.00
32,924.862 LINK
0.2269%
44
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.30
0.0046528 Eth
$386,332.00
30,950.177 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2133%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.32
0.0046647 Eth
$374,260.00
30,017.115 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2068%
46
Bithumb
LINK-KRW$12.31
0.0046572 Eth
$373,385.00
30,323.330 LINK
0.2089%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.31
0.0046564 Eth
$340,422.00
27,252.030 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1878%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.34
0.0046653 Eth
$326,995.00
26,143.589 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1801%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.33
0.0046664 Eth
$316,276.00
25,311.224 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1744%
50
MEXC
LINK-USDT$12.34
0.0046664 Eth
$313,095.00
25,382.100 LINK
0.1749%
51
PointPay
LINK-USDT$12.34
0.0046725 Eth
$309,796.00
24,611.375 LINK
0.1696%
52
CoinEx
LINK-USDT$12.31
0.0046614 Eth
$298,734.00
23,723.058 LINK
0.1635%
53
ProBit Global
LINK-BTC$12.32
0.0046664 Eth
$276,010.00
22,404.377 LINK
0.1544%
54
LATOKEN
LINK-USDT$12.34
0.0046743 Eth
$270,304.00
21,902.790 LINK
0.1509%
55
LATOKEN
LINK-BTC$12.33
0.0046708 Eth
$248,474.00
20,149.067 LINK
0.1388%
56
BigONE
LINK-USDT$12.32
0.0046605 Eth
$215,754.00
17,513.280 LINK
0.1207%
57
BitMart
LINK-BTC$12.33
0.0046648 Eth
$189,234.00
15,346.300 LINK
0.1057%
58
Bitstamp
LINK-EUR$12.31
0.0046567 Eth
$168,137.00
13,656.145 LINK
0.0941%
59
BitDelta
LINK-USDT$12.36
0.0046762 Eth
$132,894.00
10,534.000 LINK
0.0726%
60
Bitci TR
LINK-TRY$12.39
0.0046843 Eth
$129,882.00
10,277.980 LINK
0.0708%
61
Coinbase Exchange
LINK-BTC$12.31
0.0046548 Eth
$118,867.00
9,658.360 LINK
0.0666%
62
Slex
LINK-BTC$12.34
0.0046730 Eth
$118,409.00
9,466.800 LINK
0.0652%
63
Coinbase Exchange
LINK-ETH$12.33
0.0046664 Eth
$87,182.00
7,073.390 LINK
0.0487%
64
PointPay
LINK-BTC$12.32
0.0046663 Eth
$75,019.00
6,002.111 LINK
0.0414%
65
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.36
0.0046747 Eth
$70,665.00
5,687.586 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0392%
66
Slex
LINK-ETH$12.33
0.0046659 Eth
$70,186.00
5,603.220 LINK
0.0386%
67
Bitget
LINK-EUR$12.40
0.0046894 Eth
$61,105.00
4,845.690 LINK
0.0334%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.31
0.0046604 Eth
$57,279.00
4,554.841 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0314%
69
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.28
0.0046487 Eth
$56,556.00
58,024.981 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3998%
70
OKX
LINK-USDC$12.36
0.0046738 Eth
$43,666.00
3,458.199 LINK
0.0238%
71
EXMO
LINK-BTC$12.40
0.0046914 Eth
$42,683.00
3,443.484 LINK
0.0237%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.28
0.0046487 Eth
$40,611.00
3,225.098 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0222%
73
BYDFi
LINK-USDC$12.39
0.0046663 Eth
$40,338.00
3,256.750 LINK
0.0224%
74
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.30
0.0046539 Eth
$37,251.00
38,071.177 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2623%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.35
0.0046727 Eth
$29,104.00
2,322.894 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0160%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.31
0.0046594 Eth
$28,047.00
2,248.467 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0155%
77
Binance US
LINK-USDT$12.37
0.0046803 Eth
$27,398.00
2,214.063 LINK
0.0153%
78
Ace
LINK-USDT$12.33
0.0046681 Eth
$25,240.00
1,991.530 LINK
0.0137%
79
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.31
0.0046564 Eth
$24,891.00
25,471.067 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1755%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.30
0.0046508 Eth
$21,850.00
1,754.294 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0121%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.27
0.0046401 Eth
$18,559.13
1,478.331 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0102%
82
KuCoin
LINK-KCS$12.34
0.0046692 Eth
$13,948.32
1,129.905 LINK
0.0078%
83
KuCoin
LINK-BTC$12.31
0.0046563 Eth
$13,642.88
1,108.211 LINK
0.0076%
84
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.30
0.0046517 Eth
$12,497.26
999.588 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0069%
85
Coinone
LINK-KRW$12.34
0.0046664 Eth
$9,695.34
785.807 LINK
0.0054%
86
CoinEx
LINK-BTC$12.33
0.0046674 Eth
$8,710.53
697.233 LINK
0.0048%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$12.31
0.0046606 Eth
$7,574.35
605.115 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0042%
88
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$12.35
0.0046733 Eth
$6,854.42
548.617 0X5947BB275C521040051D82396192181B413227A3
0.0038%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.30
0.0046528 Eth
$6,581.98
6,710.177 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0462%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.34
0.0046665 Eth
$4,005.61
317.066 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0022%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.48
0.0047207 Eth
$3,525.94
277.154 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
92
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.31
0.0046560 Eth
$3,133.78
250.860 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0017%
93
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.31
0.0046613 Eth
$2,473.01
197.924 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0014%
94
CoinEx
LINK-USDC$12.34
0.0046707 Eth
$2,304.13
181.883 LINK
0.0013%
95
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.31
0.0046589 Eth
$1,716.84
136.374 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.30
0.0046737 Eth
$954.81
76.715 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.34
0.0046659 Eth
$896.92
72.314 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$12.38
0.0046907 Eth
$743.38
59.856 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
99
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.29
0.0046580 Eth
$341.78
350.427 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0024%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.33
0.0046748 Eth
$319.02
25.576 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%

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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