ETH Price: $2,767.67 (+4.85%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,520 ( 0.051%)

Market

Price

$17.90 @ 0.006468 ETH (+2.67%)

Onchain Market Cap

$17,900,000,000.00

Circulating Supply Market Cap

$11,417,687,261.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.000000054590613774 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0xf94730218c45c858ed6807e0263ae6eb3389c066
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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 16172.73% |ETH 0.0003846 1581.75%

Market

Volume (24H):$518,195,004.00
Market Capitalization:$11,417,687,261.00
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
Bybit
LINK-USDT$17.86
0.0064528 Eth
$29,143,321.00
1,673,076.875 LINK
13.0831%
2
MEXC
LINK-USDT$17.89
0.0064654 Eth
$28,655,280.00
1,601,817.260 LINK
12.5258%
3
HTX
LINK-USDT$17.88
0.0064625 Eth
$19,824,180.00
1,129,835.086 LINK
8.8350%
4
Coinbase Exchange
LINK-USD$17.89
0.0064658 Eth
$18,086,070.00
1,011,016.290 LINK
7.9059%
5
Slex
LINK-USDT$17.90
0.0064698 Eth
$10,129,796.00
576,712.450 LINK
4.5098%
6
P2B
LINK-USDT$17.89
0.0064665 Eth
$10,078,193.00
563,363.660 LINK
4.4054%
7
OKX
LINK-USDT$17.88
0.0064603 Eth
$9,986,520.00
570,871.237 LINK
4.4641%
8
Gate.io
LINK-USDT$17.89
0.0064634 Eth
$8,997,648.00
513,221.100 LINK
4.0133%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.84
0.0064481 Eth
$6,345,716.00
352,959.640 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7601%
10
KuCoin
LINK-USDT$17.89
0.0064659 Eth
$5,103,219.00
285,191.045 LINK
2.2301%
11
MEXC
LINK-EUR$17.87
0.0064606 Eth
$4,826,902.00
270,044.970 LINK
2.1117%
12
XT.COM
LINK-USDT$17.90
0.0064690 Eth
$4,729,494.00
269,993.490 LINK
2.1113%
13
MEXC
LINK-USDC$17.88
0.0064649 Eth
$4,642,203.00
259,642.400 LINK
2.0303%
14
Hotcoin
LINK-USDT$17.88
0.0064605 Eth
$4,347,272.00
243,147.780 LINK
1.9014%
15
Coinstore
LINK-USDT$17.88
0.0064603 Eth
$4,327,430.00
247,073.430 LINK
1.9321%
16
Binance
LINK-USDC$17.89
0.0064659 Eth
$4,101,930.00
234,135.350 LINK
1.8309%
17
Bitunix
LINK-USDT$17.89
0.0064700 Eth
$3,621,921.00
202,349.170 LINK
1.5823%
18
CoinW
LINK-USDT$17.89
0.0064631 Eth
$3,583,584.00
200,334.730 LINK
1.5666%
19
Kraken
LINK-USD$17.88
0.0064614 Eth
$3,156,614.00
176,528.201 LINK
1.3804%
20
Azbit
LINK-USDT$17.90
0.0064704 Eth
$2,871,661.00
163,894.480 LINK
1.2816%
21
BYDFi
LINK-USDT$17.90
0.0064709 Eth
$2,841,141.00
158,696.040 LINK
1.2410%
22
BTSE
LINK-USDT$17.88
0.0064636 Eth
$2,490,852.00
139,276.042 LINK
1.0891%
23
CoinEx
LINK-USDT$17.88
0.0064607 Eth
$2,261,671.00
129,829.991 LINK
1.0152%
24
QMall
LINK-USDT$17.90
0.0064710 Eth
$1,826,341.00
104,103.850 LINK
0.8141%
25
Biconomy.com
LINK-USDT$17.88
0.0064620 Eth
$1,752,096.00
99,972.650 LINK
0.7818%
26
FMCPAY
LINK-USDT$17.88
0.0064641 Eth
$1,593,712.00
90,751.766 LINK
0.7097%
27
Dex-Trade
LINK-USDT$17.90
0.0064677 Eth
$1,569,311.00
87,675.210 LINK
0.6856%
28
Bitvavo
LINK-EUR$17.90
0.0064693 Eth
$1,236,712.00
69,103.972 LINK
0.5404%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.94
0.0064850 Eth
$1,138,801.00
63,312.635 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4951%
30
FMCPAY
LINK-ETH$17.87
0.0064628 Eth
$1,038,049.00
57,782.560 LINK
0.4518%
31
Bybit
LINK-USDC$17.89
0.0064630 Eth
$1,020,073.00
58,920.198 LINK
0.4607%
32
Coinbase Exchange
LINK-EUR$17.88
0.0064635 Eth
$945,860.00
52,885.970 LINK
0.4136%
33
FMCPAY
LINK-BTC$17.88
0.0064666 Eth
$851,431.00
48,305.000 LINK
0.3777%
34
Coinbase Exchange
LINK-GBP$17.88
0.0064635 Eth
$759,630.00
42,473.490 LINK
0.3321%
35
Binance
LINK-ETH$17.89
0.0064660 Eth
$700,333.00
38,809.420 LINK
0.3035%
36
tanX
LINK-USDC$17.89
0.0064692 Eth
$651,064.00
36,957.360 LINK
0.2890%
37
PointPay
LINK-USDT$17.90
0.0064710 Eth
$648,369.00
36,998.429 LINK
0.2893%
38
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.94
0.0064855 Eth
$622,845.00
34,438.195 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2693%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.90
0.0064686 Eth
$555,200.00
31,226.544 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2442%
40
BigONE
LINK-USDT$17.90
0.0064729 Eth
$522,166.00
29,169.300 LINK
0.2281%
41
EXMO
LINK-USDT$17.89
0.0064642 Eth
$521,754.00
29,165.496 LINK
0.2281%
42
EarnBIT
LINK-USDT$17.87
0.0064606 Eth
$464,923.00
26,543.339 LINK
0.2076%
43
WhiteBIT
LINK-BTC$17.92
0.0064764 Eth
$445,049.00
24,831.280 LINK
0.1942%
44
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.83
0.0064404 Eth
$441,257.00
24,403.644 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1908%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.95
0.0064846 Eth
$411,147.00
22,884.563 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1790%
46
Binance
LINK-EUR$17.88
0.0064652 Eth
$408,387.00
23,309.960 LINK
0.1823%
47
Bitbank
LINK-JPY$17.96
0.0064901 Eth
$372,368.00
20,735.037 LINK
0.1621%
48
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.94
0.0064824 Eth
$351,240.00
38,902.035 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3042%
49
Kraken
LINK-ETH$17.89
0.0064637 Eth
$350,691.00
19,604.740 LINK
0.1533%
50
LATOKEN
LINK-BTC$17.90
0.0064701 Eth
$344,430.00
19,239.353 LINK
0.1504%
51
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.95
0.0064838 Eth
$328,970.00
18,171.583 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1421%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.86
0.0064545 Eth
$323,999.00
18,489.789 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1446%
53
Binance
LINK-TRY$17.93
0.0064822 Eth
$303,128.00
17,211.500 LINK
0.1346%
54
QMall
LINK-USDC$17.88
0.0064620 Eth
$296,316.00
16,892.472 LINK
0.1321%
55
BitMart
LINK-BTC$17.88
0.0064605 Eth
$290,151.00
16,227.020 LINK
0.1269%
56
Gemini
LINK-USD$17.89
0.0064624 Eth
$232,677.00
13,008.861 LINK
0.1017%
57
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.94
0.0064850 Eth
$229,768.00
13,111.213 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1025%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.86
0.0064531 Eth
$227,654.00
224,333.192 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7542%
59
Slex
LINK-ETH$17.87
0.0064596 Eth
$216,710.00
12,031.700 LINK
0.0941%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.86
0.0064545 Eth
$178,078.00
9,893.432 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0774%
61
Bybit
LINK-EUR$17.85
0.0064495 Eth
$172,551.00
9,982.750 LINK
0.0781%
62
Hotcoin
LINK-BTC$17.90
0.0064733 Eth
$154,181.00
8,614.930 LINK
0.0674%
63
BitStorage
LINK-ETH$17.87
0.0064587 Eth
$146,224.00
8,180.710 LINK
0.0640%
64
OKX
LINK-USDC$17.87
0.0064575 Eth
$145,220.00
8,262.889 LINK
0.0646%
65
BYDFi
LINK-USDC$17.90
0.0064698 Eth
$130,461.00
7,289.080 LINK
0.0570%
66
KuCoin
LINK-USDC$17.90
0.0064678 Eth
$125,147.00
6,991.703 LINK
0.0547%
67
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.84
0.0064481 Eth
$121,883.00
6,947.920 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0543%
68
GMO Japan
LINK-JPY$17.98
0.0064994 Eth
$116,699.00
6,489.600 LINK
0.0507%
69
Gemini
LINK-BTC$17.96
0.0064888 Eth
$100,138.00
5,575.937 LINK
0.0436%
70
Bitkub
LINK-THB$17.90
0.0064686 Eth
$98,888.00
5,523.987 LINK
0.0432%
71
BitMart
LINK-ETH$17.88
0.0064585 Eth
$89,965.00
5,032.940 LINK
0.0394%
72
Bitso
LINK-USD$17.87
0.0064592 Eth
$79,543.00
4,450.435 LINK
0.0348%
73
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.90
0.0064703 Eth
$66,891.00
3,712.278 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0290%
74
KuCoin
LINK-BTC$17.88
0.0064606 Eth
$62,820.00
3,513.531 LINK
0.0275%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.84
0.0064454 Eth
$53,881.00
3,061.255 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0239%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.86
0.0064517 Eth
$53,763.00
2,987.247 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0234%
77
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.95
0.0064840 Eth
$47,890.00
46,712.434 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3653%
78
Bitstamp
LINK-GBP$17.90
0.0064665 Eth
$40,925.00
2,286.651 LINK
0.0179%
79
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.94
0.0064803 Eth
$34,483.00
1,911.826 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0150%
80
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.88
0.0064604 Eth
$31,706.00
31,294.853 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2447%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.96
0.0064890 Eth
$26,260.00
1,479.197 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0116%
82
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.76
0.0064161 Eth
$25,802.00
35.456 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0003%
83
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.87
0.0064593 Eth
$21,963.00
21,499.461 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1681%
84
Dex-Trade
LINK-ETH$17.86
0.0064547 Eth
$18,462.96
1,033.580 LINK
0.0081%
85
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.97
0.0064943 Eth
$16,252.79
929.730 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0073%
86
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.75
0.0064134 Eth
$15,187.52
1,802.455 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0141%
87
CoinEx
LINK-USDC$17.95
0.0064867 Eth
$12,596.50
718.075 LINK
0.0056%
88
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.97
0.0064940 Eth
$11,308.65
620.384 0X5947BB275C521040051D82396192181B413227A3
0.0049%
89
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.85
0.0064527 Eth
$9,510.45
9,325.781 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0729%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.86
0.0064568 Eth
$9,249.31
527.656 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0041%
91
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.95
0.0064845 Eth
$8,748.71
35.026 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0003%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.88
0.0064637 Eth
$8,343.13
475.532 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0037%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.79
0.0064297 Eth
$8,225.90
464.888 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0036%
94
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.96
0.0064909 Eth
$8,166.86
447.763 0X5947BB275C521040051D82396192181B413227A3
0.0035%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.96
0.0064885 Eth
$7,211.34
409.467 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0032%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.89
0.0064646 Eth
$6,224.30
345.836 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0027%
97
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.88
0.0064616 Eth
$4,912.01
280.729 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0022%
98
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.92
0.0064755 Eth
$3,896.02
216.265 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0017%
99
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.84
0.0064476 Eth
$3,855.55
15.549 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
100
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.88
0.0064581 Eth
$3,806.29
3,729.199 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0292%

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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