ETH Price: $2,784.72 (+1.67%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,590 ( 0.025%)

Market

Price

$17.71 @ 0.006356 ETH (+0.66%)

Onchain Market Cap

$17,710,000,000.00

Circulating Supply Market Cap

$11,294,722,597.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x74dba1e3a2a48cb3329a1e67f106039f874b3856
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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 16000% |ETH 0.0003846 1552.63%

Market

Volume (24H):$328,481,682.00
Market Capitalization:$11,294,722,597.00
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
Websea
LINK-USDT$17.72
0.0063507 Eth
$34,051,565.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$17.71
0.0063469 Eth
$32,432,082.00
1,820,826.680 LINK
16.5344%
3
WhiteBIT
LINK-USDT$17.65
0.0063269 Eth
$20,761,423.00
1,176,302.350 LINK
10.6817%
4
MEXC
LINK-USDT$17.63
0.0063213 Eth
$19,293,936.00
1,094,230.250 LINK
9.9364%
5
Bybit
LINK-USDT$17.61
0.0063141 Eth
$13,654,458.00
768,440.640 LINK
6.9780%
6
HTX
LINK-USDT$17.63
0.0063188 Eth
$13,243,535.00
743,796.372 LINK
6.7542%
7
Coinbase Exchange
LINK-USD$17.69
0.0063378 Eth
$10,803,961.00
610,772.850 LINK
5.5463%
8
Bitget
LINK-USDT$17.63
0.0063220 Eth
$9,176,529.00
515,837.490 LINK
4.6842%
9
P2B
LINK-USDT$17.64
0.0063237 Eth
$7,305,855.00
414,111.910 LINK
3.7604%
10
Ourbit
LINK-USDT$17.72
0.0063485 Eth
$6,573,361.00
368,923.250 LINK
3.3501%
11
BVOX
LINK-USDT$17.69
0.0063324 Eth
$5,071,709.00
284,561.000 LINK
2.5840%
12
DigiFinex
LINK-USDT$17.61
0.0063154 Eth
$4,120,463.00
233,939.160 LINK
2.1243%
13
OKX
LINK-USDT$17.63
0.0063196 Eth
$4,081,253.00
229,244.910 LINK
2.0817%
14
Gate.io
LINK-USDT$17.63
0.0063203 Eth
$3,603,233.00
202,588.980 LINK
1.8397%
15
FameEX
LINK-USDT$17.64
0.0063224 Eth
$3,334,985.00
187,256.356 LINK
1.7004%
16
KuCoin
LINK-USDT$17.62
0.0063162 Eth
$3,280,025.00
186,201.112 LINK
1.6908%
17
XT.COM
LINK-USDT$17.71
0.0063471 Eth
$3,219,057.00
180,753.290 LINK
1.6414%
18
Coinstore
LINK-USDT$17.68
0.0063358 Eth
$3,021,205.00
169,728.860 LINK
1.5413%
19
BTSE
LINK-USDT$17.69
0.0063385 Eth
$2,158,991.00
122,039.212 LINK
1.1082%
20
Bitunix
LINK-USDT$17.71
0.0063448 Eth
$2,098,587.00
118,488.270 LINK
1.0760%
21
Azbit
LINK-USDT$17.66
0.0063313 Eth
$2,055,380.00
115,422.287 LINK
1.0481%
22
BYDFi
LINK-USDT$17.70
0.0063431 Eth
$1,781,890.00
100,657.590 LINK
0.9140%
23
Toobit
LINK-USDT$17.75
0.0063462 Eth
$1,578,894.00
88,580.440 LINK
0.8044%
24
LATOKEN
LINK-USDT$17.65
0.0063255 Eth
$1,575,418.00
89,278.854 LINK
0.8107%
25
FMCPAY
LINK-USDT$17.68
0.0063350 Eth
$1,464,073.00
82,075.424 LINK
0.7453%
26
Biconomy.com
LINK-USDT$17.71
0.0063451 Eth
$1,207,655.00
67,789.920 LINK
0.6156%
27
Dex-Trade
LINK-USDT$17.75
0.0063359 Eth
$1,048,362.00
59,058.096 LINK
0.5363%
28
Crypto.com Exchange
LINK-USDT$17.65
0.0063270 Eth
$991,530.00
56,191.030 LINK
0.5103%
29
FMCPAY
LINK-ETH$17.77
0.0063433 Eth
$950,320.00
52,813.120 LINK
0.4796%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.71
0.0063476 Eth
$918,446.00
51,183.764 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4648%
31
CoinEx
LINK-USDT$17.69
0.0063376 Eth
$899,826.00
50,455.784 LINK
0.4582%
32
Bitvavo
LINK-EUR$17.79
0.0063507 Eth
$878,284.00
49,364.486 LINK
0.4483%
33
tanX
LINK-USDC$17.72
0.0063507 Eth
$773,622.00
43,449.590 LINK
0.3946%
34
Coinbase Exchange
LINK-EUR$17.68
0.0063343 Eth
$455,752.00
25,784.100 LINK
0.2341%
35
Pionex
LINK-USDT$17.64
0.0063223 Eth
$425,175.00
23,870.270 LINK
0.2168%
36
Kraken
LINK-ETH$17.62
0.0063164 Eth
$378,993.00
21,510.532 LINK
0.1953%
37
Coinbase Exchange
LINK-GBP$17.63
0.0063187 Eth
$333,373.00
18,907.050 LINK
0.1717%
38
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.69
0.0063420 Eth
$309,917.00
34,562.997 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3139%
39
BigONE
LINK-USDT$17.67
0.0063302 Eth
$287,774.00
16,290.460 LINK
0.1479%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.75
0.0063616 Eth
$283,611.00
15,948.979 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1448%
41
BitMart
LINK-BTC$17.67
0.0063359 Eth
$273,315.00
15,463.480 LINK
0.1404%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.69
0.0063414 Eth
$271,143.00
15,129.071 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1374%
43
WhiteBIT
LINK-BTC$17.73
0.0063554 Eth
$221,841.00
12,512.570 LINK
0.1136%
44
Bitbank
LINK-JPY$17.67
0.0063342 Eth
$218,783.00
12,381.532 LINK
0.1124%
45
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.69
0.0063411 Eth
$208,970.00
210,676.336 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.9131%
46
LATOKEN
LINK-BTC$17.66
0.0063307 Eth
$201,639.00
11,417.586 LINK
0.1037%
47
Bitci TR
LINK-TRY$17.73
0.0063538 Eth
$188,114.00
10,505.070 LINK
0.0954%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.69
0.0063411 Eth
$176,739.00
9,905.521 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0899%
49
Bybit
LINK-USDC$17.64
0.0063243 Eth
$175,858.00
9,937.139 LINK
0.0902%
50
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.72
0.0063513 Eth
$166,473.00
9,249.529 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0840%
51
NovaDAX
LINK-BRL$17.85
0.0063970 Eth
$158,085.00
8,854.247 LINK
0.0804%
52
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.72
0.0063529 Eth
$134,060.00
7,485.128 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0680%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.68
0.0063360 Eth
$129,801.00
7,297.750 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0663%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.69
0.0063411 Eth
$99,737.00
5,567.433 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0506%
55
Coinbase Exchange
LINK-BTC$17.64
0.0063245 Eth
$90,070.00
5,105.130 LINK
0.0464%
56
BitStorage
LINK-ETH$17.64
0.0063253 Eth
$89,833.00
5,092.320 LINK
0.0462%
57
GMO Japan
LINK-JPY$17.80
0.0063767 Eth
$85,490.00
4,803.500 LINK
0.0436%
58
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.69
0.0063420 Eth
$82,787.00
4,633.707 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0421%
59
BitMart
LINK-ETH$17.66
0.0063296 Eth
$80,165.00
4,540.040 LINK
0.0412%
60
Hotcoin
LINK-BTC$17.73
0.0063544 Eth
$78,388.00
4,420.920 LINK
0.0401%
61
bitcastle
LINK-USDT$17.68
0.0063349 Eth
$77,413.00
4,345.730 LINK
0.0395%
62
WhiteBIT
LINK-EUR$17.74
0.0063556 Eth
$72,149.00
4,067.840 LINK
0.0369%
63
BYDFi
LINK-USDC$17.69
0.0063383 Eth
$69,431.00
3,925.280 LINK
0.0356%
64
Bitexen
LINK-TRY$17.61
0.0063118 Eth
$63,035.00
3,579.991 LINK
0.0325%
65
Bitso
LINK-USD$17.66
0.0063314 Eth
$47,663.00
2,698.830 LINK
0.0245%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.70
0.0063454 Eth
$42,349.00
2,389.901 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0217%
67
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.71
0.0063476 Eth
$41,765.00
42,075.539 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3821%
68
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.73
0.0063552 Eth
$40,661.00
40,944.547 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3718%
69
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.88
0.0064109 Eth
$38,156.00
2,126.281 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0193%
70
BTCMarkets
LINK-AUD$17.71
0.0063484 Eth
$36,168.00
2,041.678 LINK
0.0185%
71
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.72
0.0063512 Eth
$34,751.00
1,935.871 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0176%
72
Kraken
LINK-GBP$17.77
0.0063696 Eth
$28,336.00
1,594.813 LINK
0.0145%
73
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.65
0.0063254 Eth
$26,455.00
1,527.462 0X5947BB275C521040051D82396192181B413227A3
0.0139%
74
EXMO
LINK-BTC$17.75
0.0063631 Eth
$22,078.00
1,243.902 LINK
0.0113%
75
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.75
0.0063646 Eth
$14,731.00
14,818.719 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1346%
76
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.68
0.0063389 Eth
$13,461.56
1,618.352 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0147%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.71
0.0063492 Eth
$12,836.77
722.368 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0066%
78
Dex-Trade
LINK-ETH$17.65
0.0063280 Eth
$11,563.29
655.110 LINK
0.0059%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.69
0.0063420 Eth
$10,509.41
589.209 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0054%
80
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.69
0.0063406 Eth
$7,591.64
439.239 0X5947BB275C521040051D82396192181B413227A3
0.0040%
81
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.66
0.0063301 Eth
$5,999.69
6,056.420 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0550%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.68
0.0063390 Eth
$5,974.72
332.794 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0030%
83
CoinEx
LINK-USDC$17.80
0.0063793 Eth
$5,924.89
334.871 LINK
0.0030%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.69
0.0063383 Eth
$5,794.77
324.395 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0029%
85
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.62
0.0063175 Eth
$5,037.70
291.409 0X5947BB275C521040051D82396192181B413227A3
0.0026%
86
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.71
0.0063464 Eth
$4,819.89
19.535 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0002%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.71
0.0063463 Eth
$4,131.42
4,157.154 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0377%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.68
0.0063393 Eth
$3,770.99
212.420 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.70
0.0063466 Eth
$3,755.03
211.406 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0019%
90
CoinEx
LINK-BTC$17.78
0.0063718 Eth
$3,116.93
175.393 LINK
0.0016%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.68
0.0063370 Eth
$2,989.97
165.422 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0015%
92
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.70
0.0063459 Eth
$2,659.52
148.545 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0013%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.68
0.0063370 Eth
$1,515.36
86.309 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0008%
94
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.77
0.0063672 Eth
$1,248.03
69.422 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
95
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XD036414FA2BCBB802691491E323BFF1348C5F4BA$17.69
0.0063393 Eth
$926.18
48.772 0X5947BB275C521040051D82396192181B413227A3
0.0004%
96
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.69
0.0063420 Eth
$659.90
37.848 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0003%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.74
0.0063582 Eth
$611.32
34.124 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$17.68
0.0063401 Eth
$591.65
33.379 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
99
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.72
0.0063467 Eth
$473.43
24.559 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
100
Uniswap V4 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.87
0.0064074 Eth
$316.50
17.741 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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