ETH Price: $2,777.82 (+3.70%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,469 ( 0.051%)

Market

Price

$17.98 @ 0.006473 ETH (+1.51%)

Onchain Market Cap

$17,980,000,000.00

Circulating Supply Market Cap

$11,480,139,326.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Binance Dep: 0xf361998E38e9ddFf87a98E684373f7C75344FB14
Balance
0 LINK

Value
$0.00
0xf361998e38e9ddff87a98e684373f7c75344fb14
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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 16245.45% |ETH 0.0003846 1583.05%

Market

Volume (24H):$549,297,636.00
Market Capitalization:$11,480,139,326.00
Circulating Supply:638,099,970.00 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$17.99
0.0064585 Eth
$52,165,874.00
2,900,486.930 LINK
16.4134%
2
Binance
LINK-USDT$17.98
0.0064700 Eth
$51,386,008.00
2,934,389.560 LINK
16.6053%
3
Bybit
LINK-USDT$17.93
0.0064516 Eth
$31,668,363.00
1,818,331.941 LINK
10.2897%
4
Coinbase Exchange
LINK-USD$17.97
0.0064657 Eth
$21,257,008.00
1,182,718.960 LINK
6.6928%
5
HTX
LINK-USDT$17.97
0.0064675 Eth
$20,137,363.00
1,148,263.611 LINK
6.4979%
6
P2B
LINK-USDT$17.96
0.0064628 Eth
$10,816,973.00
602,332.430 LINK
3.4085%
7
OKX
LINK-USDT$17.98
0.0064728 Eth
$10,538,826.00
602,656.626 LINK
3.4103%
8
Gate.io
LINK-USDT$17.96
0.0064674 Eth
$9,324,598.00
531,887.260 LINK
3.0099%
9
DigiFinex
LINK-USDT$17.97
0.0064672 Eth
$7,177,553.00
399,403.640 LINK
2.2602%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.02
0.0064759 Eth
$6,659,063.00
368,168.745 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.0834%
11
KuCoin
LINK-USDT$17.97
0.0064665 Eth
$6,288,667.00
349,979.444 LINK
1.9805%
12
MEXC
LINK-EUR$17.98
0.0064734 Eth
$5,255,257.00
292,299.310 LINK
1.6541%
13
XT.COM
LINK-USDT$17.99
0.0064589 Eth
$5,131,105.00
293,033.370 LINK
1.6582%
14
LBank
LINK-USDT$17.99
0.0064603 Eth
$4,694,072.00
260,877.940 LINK
1.4763%
15
Coinstore
LINK-USDT$17.94
0.0064552 Eth
$4,684,402.00
267,598.310 LINK
1.5143%
16
Binance
LINK-FDUSD$17.91
0.0064445 Eth
$4,332,980.00
248,344.920 LINK
1.4053%
17
Binance
LINK-USDC$17.98
0.0064706 Eth
$4,234,763.00
241,779.660 LINK
1.3682%
18
CoinW
LINK-USDT$18.00
0.0064644 Eth
$3,928,449.00
218,224.430 LINK
1.2349%
19
Bitunix
LINK-USDT$17.99
0.0064589 Eth
$3,887,463.00
216,089.420 LINK
1.2228%
20
Kraken
LINK-USD$17.96
0.0064666 Eth
$3,480,860.00
193,812.047 LINK
1.0968%
21
Azbit
LINK-USDT$18.00
0.0064626 Eth
$3,100,965.00
177,087.250 LINK
1.0021%
22
BYDFi
LINK-USDT$17.98
0.0064578 Eth
$2,940,942.00
163,573.730 LINK
0.9256%
23
BTSE
LINK-USDT$17.97
0.0064575 Eth
$2,683,655.00
149,340.500 LINK
0.8451%
24
CoinEx
LINK-USDT$17.95
0.0064609 Eth
$2,464,587.00
141,466.723 LINK
0.8005%
25
QMall
LINK-USDT$18.00
0.0064639 Eth
$2,115,891.00
120,878.500 LINK
0.6840%
26
Crypto.com Exchange
LINK-USDT$17.97
0.0064557 Eth
$2,057,600.00
114,533.750 LINK
0.6481%
27
Biconomy.com
LINK-USDT$17.98
0.0064582 Eth
$1,775,007.00
101,336.590 LINK
0.5734%
28
Dex-Trade
LINK-USDT$17.95
0.0064382 Eth
$1,731,433.00
96,461.390 LINK
0.5459%
29
FMCPAY
LINK-USDT$17.99
0.0064603 Eth
$1,634,184.00
93,105.094 LINK
0.5269%
30
Bitvavo
LINK-EUR$18.00
0.0064649 Eth
$1,499,427.00
83,287.258 LINK
0.4713%
31
Bybit
LINK-USDC$17.96
0.0064647 Eth
$1,080,525.00
62,389.929 LINK
0.3531%
32
FMCPAY
LINK-ETH$18.04
0.0064827 Eth
$1,057,591.00
58,386.560 LINK
0.3304%
33
Coinbase Exchange
LINK-EUR$17.99
0.0064772 Eth
$1,052,242.00
58,492.070 LINK
0.3310%
34
Coinbase Exchange
LINK-GBP$17.99
0.0064759 Eth
$996,570.00
55,408.590 LINK
0.3135%
35
Trubit
LINK-USDT$17.95
0.0064352 Eth
$909,414.00
51,789.450 LINK
0.2931%
36
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.93
0.0064446 Eth
$773,511.00
42,640.971 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2413%
37
PointPay
LINK-USDT$17.97
0.0064699 Eth
$764,750.00
43,738.005 LINK
0.2475%
38
tanX
LINK-USDC$18.00
0.0064656 Eth
$640,886.00
36,423.580 LINK
0.2061%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.00
0.0064773 Eth
$569,432.00
31,878.377 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1804%
40
BigONE
LINK-USDT$17.99
0.0064653 Eth
$568,266.00
31,585.890 LINK
0.1787%
41
EXMO
LINK-USDT$17.97
0.0064630 Eth
$560,370.00
31,191.320 LINK
0.1765%
42
Phemex
LINK-USDT$17.97
0.0064542 Eth
$546,068.00
30,388.910 LINK
0.1720%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.99
0.0064748 Eth
$514,410.00
28,264.960 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1599%
44
EarnBIT
LINK-USDT$17.98
0.0064499 Eth
$510,143.00
29,153.772 LINK
0.1650%
45
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.00
0.0064684 Eth
$455,406.00
50,308.905 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2847%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.00
0.0064778 Eth
$420,887.00
23,321.811 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1320%
47
LATOKEN
LINK-BTC$17.95
0.0064403 Eth
$398,153.00
22,178.252 LINK
0.1255%
48
Bitbank
LINK-JPY$18.03
0.0064811 Eth
$387,861.00
21,506.099 LINK
0.1217%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$18.00
0.0064778 Eth
$356,639.00
20,361.420 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1152%
50
Kraken
LINK-ETH$17.92
0.0064505 Eth
$351,329.00
19,610.515 LINK
0.1110%
51
Binance
LINK-TRY$17.98
0.0064710 Eth
$344,986.00
19,587.340 LINK
0.1108%
52
QMall
LINK-USDC$18.00
0.0064626 Eth
$326,078.00
18,631.903 LINK
0.1054%
53
BitMart
LINK-BTC$17.99
0.0064708 Eth
$292,123.00
16,240.540 LINK
0.0919%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.92
0.0064393 Eth
$252,165.00
14,085.193 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0797%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.93
0.0064421 Eth
$248,103.00
14,305.905 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0810%
56
Gemini
LINK-USD$17.99
0.0064731 Eth
$241,971.00
13,452.522 LINK
0.0761%
57
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.00
0.0064778 Eth
$241,293.00
235,624.304 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.3334%
58
Slex
LINK-ETH$18.02
0.0064723 Eth
$226,361.00
12,466.570 LINK
0.0705%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.98
0.0064703 Eth
$185,620.00
10,254.057 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0580%
60
BitStorage
LINK-ETH$17.96
0.0064522 Eth
$176,426.00
9,825.860 LINK
0.0556%
61
BitDelta
LINK-USDT$17.98
0.0064505 Eth
$174,490.00
9,955.000 LINK
0.0563%
62
Bitci TR
LINK-TRY$17.92
0.0064391 Eth
$173,430.00
9,830.538 LINK
0.0556%
63
OKX
LINK-USDC$17.96
0.0064682 Eth
$160,485.00
9,159.705 LINK
0.0518%
64
Hotcoin
LINK-BTC$17.97
0.0064656 Eth
$158,575.00
8,823.160 LINK
0.0499%
65
BYDFi
LINK-USDC$17.90
0.0064239 Eth
$146,159.00
8,164.960 LINK
0.0462%
66
GMO Japan
LINK-JPY$17.98
0.0064620 Eth
$141,528.00
7,870.300 LINK
0.0445%
67
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.88
0.0064265 Eth
$136,843.00
7,803.692 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0442%
68
KuCoin
LINK-USDC$18.00
0.0064764 Eth
$128,092.00
7,117.674 LINK
0.0403%
69
Bitkub
LINK-THB$18.04
0.0064813 Eth
$106,260.00
5,891.494 LINK
0.0333%
70
Gemini
LINK-BTC$17.98
0.0064702 Eth
$100,597.00
5,595.278 LINK
0.0317%
71
BitMart
LINK-ETH$17.91
0.0064446 Eth
$90,436.00
5,048.240 LINK
0.0286%
72
Bitso
LINK-USD$17.97
0.0064592 Eth
$88,415.00
4,919.011 LINK
0.0278%
73
KuCoin
LINK-BTC$18.01
0.0064820 Eth
$77,469.00
4,301.022 LINK
0.0243%
74
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.99
0.0064636 Eth
$71,168.00
3,921.282 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0222%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.93
0.0064546 Eth
$60,001.00
3,313.117 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0187%
76
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.98
0.0064700 Eth
$59,411.00
3,374.683 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0191%
77
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.96
0.0064643 Eth
$52,431.00
51,081.807 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2891%
78
Hotcoin
LINK-ETH$17.96
0.0064594 Eth
$44,317.00
2,468.160 LINK
0.0140%
79
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.99
0.0064657 Eth
$43,580.00
2,380.911 0X5947BB275C521040051D82396192181B413227A3
0.0135%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.00
0.0064775 Eth
$37,217.00
2,055.415 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0116%
81
Mercado Bitcoin
LINK-BRL$18.08
0.0065043 Eth
$36,353.00
2,010.650 LINK
0.0114%
82
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.97
0.0064576 Eth
$35,332.00
34,632.979 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1960%
83
EXMO
LINK-BTC$17.95
0.0064558 Eth
$28,858.00
1,608.079 LINK
0.0091%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.00
0.0064791 Eth
$28,080.00
1,577.313 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0089%
85
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.97
0.0064577 Eth
$24,405.00
23,773.046 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1345%
86
Dex-Trade
LINK-ETH$17.98
0.0064500 Eth
$21,586.00
1,200.730 LINK
0.0068%
87
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.92
0.0064398 Eth
$18,803.22
1,078.131 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0061%
88
Indodax
LINK-IDR$18.09
0.0064947 Eth
$15,127.86
836.326 LINK
0.0047%
89
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.84
0.0064191 Eth
$14,982.49
1,767.237 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0100%
90
CoinEx
LINK-USDC$17.94
0.0064474 Eth
$13,096.65
746.450 LINK
0.0042%
91
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.96
0.0064642 Eth
$13,092.13
17.983 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
92
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.09
0.0064992 Eth
$11,618.46
630.654 0X5947BB275C521040051D82396192181B413227A3
0.0036%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.95
0.0064487 Eth
$10,994.70
624.306 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0035%
94
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.97
0.0064563 Eth
$10,676.86
10,404.429 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0589%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.98
0.0064594 Eth
$10,167.12
580.378 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0033%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.88
0.0064205 Eth
$9,684.30
542.321 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0031%
97
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.90
0.0064271 Eth
$8,519.25
34.192 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0002%
98
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.13
0.0065279 Eth
$8,251.76
447.477 0X5947BB275C521040051D82396192181B413227A3
0.0025%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.99
0.0064727 Eth
$8,055.53
456.551 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0026%
100
Ace
LINK-USDT$17.87
0.0064226 Eth
$2,230.61
127.450 LINK
0.0007%

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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