ETH Price: $2,703.80 (-0.65%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

734,644 ( 0.005%)

Market

Price

$18.82 @ 0.006961 ETH (-1.54%)

Onchain Market Cap

$18,820,000,000.00

Circulating Supply Market Cap

$12,009,855,977.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
30.003999591999055527 LINK

Value
$564.68 ( ~0.208846618070409 Eth) [0.0000%]
0x6fb819aaf0bcfdc537b3ba801c8067e417cec266
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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 17009.09% |ETH 0.0003846 1709.93%

Market

Volume (24H):$451,384,957.00
Market Capitalization:$12,009,855,977.00
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
Coinbase Exchange
LINK-USD$18.80
0.0069479 Eth
$28,089,915.00
1,493,906.030 LINK
13.1547%
2
MEXC
LINK-USDT$18.81
0.0069537 Eth
$26,191,980.00
1,392,338.140 LINK
12.2603%
3
Bybit
LINK-USDT$18.81
0.0069524 Eth
$23,903,342.00
1,286,953.759 LINK
11.3323%
4
HTX
LINK-USDT$18.80
0.0069526 Eth
$20,120,696.00
1,080,738.811 LINK
9.5165%
5
P2B
LINK-USDT$18.82
0.0069548 Eth
$9,401,143.00
499,485.920 LINK
4.3982%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.81
0.0069570 Eth
$6,929,282.00
367,828.593 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.2389%
7
Gate.io
LINK-USDT$18.81
0.0069527 Eth
$6,569,379.00
352,646.260 LINK
3.1052%
8
OKX
LINK-USDT$18.80
0.0069498 Eth
$6,373,927.00
342,507.198 LINK
3.0160%
9
WhiteBIT
LINK-USDT$18.80
0.0069471 Eth
$5,438,645.00
289,275.230 LINK
2.5472%
10
Hotcoin
LINK-USDT$18.97
0.0069881 Eth
$4,610,277.00
243,007.630 LINK
2.1398%
11
XT.COM
LINK-USDT$18.82
0.0069572 Eth
$4,562,602.00
244,964.300 LINK
2.1570%
12
Binance
LINK-USDC$18.81
0.0069480 Eth
$4,551,142.00
244,802.900 LINK
2.1556%
13
BTSE
LINK-USDT$18.81
0.0069537 Eth
$4,495,592.00
238,980.969 LINK
2.1044%
14
KuCoin
LINK-USDT$18.80
0.0069525 Eth
$4,289,465.00
228,130.354 LINK
2.0088%
15
Coinstore
LINK-USDT$18.81
0.0069500 Eth
$4,059,965.00
218,060.470 LINK
1.9201%
16
CoinW
LINK-USDT$18.82
0.0069531 Eth
$3,696,246.00
196,402.270 LINK
1.7294%
17
Kraken
LINK-USD$18.82
0.0069557 Eth
$3,379,394.00
179,597.017 LINK
1.5815%
18
Bitunix
LINK-USDT$18.82
0.0069556 Eth
$3,320,522.00
176,431.050 LINK
1.5536%
19
Azbit
LINK-USDT$18.81
0.0069539 Eth
$2,691,135.00
144,502.894 LINK
1.2724%
20
BYDFi
LINK-USDT$18.81
0.0069535 Eth
$2,594,537.00
137,922.840 LINK
1.2145%
21
LATOKEN
LINK-USDT$18.82
0.0069523 Eth
$1,997,600.00
106,130.937 LINK
0.9345%
22
FMCPAY
LINK-USDT$18.80
0.0069474 Eth
$1,823,023.00
97,956.102 LINK
0.8626%
23
QMall
LINK-USDT$18.81
0.0069502 Eth
$1,802,150.00
96,854.275 LINK
0.8529%
24
Coinbase Exchange
LINK-EUR$18.80
0.0069521 Eth
$1,727,297.00
91,870.300 LINK
0.8090%
25
Biconomy.com
LINK-USDT$18.82
0.0069503 Eth
$1,316,545.00
70,722.250 LINK
0.6227%
26
FMCPAY
LINK-ETH$18.82
0.0069554 Eth
$1,147,103.00
60,746.880 LINK
0.5349%
27
FMCPAY
LINK-BTC$18.80
0.0069485 Eth
$1,018,529.00
54,349.250 LINK
0.4786%
28
CoinEx
LINK-USDT$18.81
0.0069514 Eth
$1,015,518.00
54,661.285 LINK
0.4813%
29
Bitvavo
LINK-EUR$18.94
0.0069843 Eth
$989,457.00
52,236.274 LINK
0.4600%
30
Coinbase Exchange
LINK-GBP$18.79
0.0069484 Eth
$888,358.00
47,274.700 LINK
0.4163%
31
tanX
LINK-USDC$18.81
0.0069499 Eth
$844,407.00
45,227.900 LINK
0.3983%
32
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.82
0.0069549 Eth
$766,045.00
40,547.517 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3570%
33
Trubit
LINK-USDT$18.80
0.0069508 Eth
$753,079.00
40,479.050 LINK
0.3564%
34
PointPay
LINK-USDT$18.80
0.0069502 Eth
$663,603.00
35,656.844 LINK
0.3140%
35
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.87
0.0069749 Eth
$604,569.00
32,066.237 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2824%
36
BigONE
LINK-USDT$18.87
0.0069694 Eth
$602,194.00
31,917.220 LINK
0.2810%
37
WhiteBIT
LINK-BTC$18.88
0.0069689 Eth
$586,266.00
31,049.540 LINK
0.2734%
38
Binance
LINK-TRY$18.79
0.0069367 Eth
$553,808.00
29,741.730 LINK
0.2619%
39
Bitbank
LINK-JPY$18.86
0.0069697 Eth
$531,259.00
28,165.321 LINK
0.2480%
40
EXMO
LINK-USDT$18.81
0.0069553 Eth
$519,025.00
27,592.900 LINK
0.2430%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$18.80
0.0069525 Eth
$418,679.00
22,531.627 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1984%
42
Gemini
LINK-USD$18.82
0.0069570 Eth
$410,068.00
21,788.943 LINK
0.1919%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.82
0.0069555 Eth
$402,729.00
21,383.355 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1883%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.83
0.0069584 Eth
$400,580.00
21,391.058 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1884%
45
Bitbegin
LINK-USDT$18.82
0.0069514 Eth
$379,739.00
20,437.690 LINK
0.1800%
46
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.80
0.0069487 Eth
$373,177.00
368,333.222 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.2434%
47
QMall
LINK-USDC$18.82
0.0069522 Eth
$360,794.00
19,417.899 LINK
0.1710%
48
LATOKEN
LINK-BTC$18.81
0.0069476 Eth
$350,914.00
18,656.303 LINK
0.1643%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.81
0.0069570 Eth
$322,003.00
32,764.314 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2885%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.81
0.0069499 Eth
$283,601.00
15,020.347 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1323%
51
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.83
0.0069621 Eth
$279,806.00
15,069.482 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1327%
52
BitMart
LINK-BTC$18.81
0.0069550 Eth
$252,108.00
13,403.380 LINK
0.1180%
53
OKX
LINK-USDC$18.81
0.0069536 Eth
$219,608.00
11,843.209 LINK
0.1043%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.91
0.0069880 Eth
$217,457.00
11,522.038 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1015%
55
BitDelta
LINK-USDT$18.81
0.0069535 Eth
$209,424.00
11,258.000 LINK
0.0991%
56
Binance
LINK-BNB$18.98
0.0070033 Eth
$196,801.00
10,842.403 LINK
0.0955%
57
GMO Japan
LINK-JPY$18.86
0.0069709 Eth
$196,049.00
10,394.700 LINK
0.0915%
58
Coinbase Exchange
LINK-USDT$18.85
0.0069707 Eth
$190,219.00
10,090.387 LINK
0.0889%
59
Hotcoin
LINK-BTC$18.82
0.0069512 Eth
$167,207.00
8,884.960 LINK
0.0782%
60
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.81
0.0069570 Eth
$160,213.00
8,624.423 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0759%
61
BYDFi
LINK-USDC$18.94
0.0069783 Eth
$152,053.00
8,029.930 LINK
0.0707%
62
CoinTR
LINK-TRY$18.76
0.0069236 Eth
$148,559.00
7,996.140 LINK
0.0704%
63
Slex
LINK-ETH$18.84
0.0069548 Eth
$145,496.00
7,712.550 LINK
0.0679%
64
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.82
0.0069562 Eth
$137,021.00
7,371.440 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0649%
65
Kraken
LINK-GBP$18.76
0.0069348 Eth
$120,281.00
6,411.550 LINK
0.0565%
66
BitStorage
LINK-ETH$18.83
0.0069586 Eth
$118,827.00
6,311.460 LINK
0.0556%
67
Bitkub
LINK-THB$18.96
0.0070053 Eth
$118,310.00
6,238.463 LINK
0.0549%
68
WhiteBIT
LINK-TRY$18.83
0.0069526 Eth
$116,570.00
6,191.280 LINK
0.0545%
69
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.82
0.0069570 Eth
$95,297.00
5,251.378 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0462%
70
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.82
0.0069549 Eth
$88,956.00
87,639.932 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7717%
71
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.90
0.0069806 Eth
$75,168.00
4,071.655 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0359%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.92
0.0069951 Eth
$67,932.00
3,629.590 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0320%
73
Kanga
LINK-PLN$18.89
0.0069809 Eth
$66,875.00
0.000 LINK
0.0000%
74
Bitso
LINK-USD$18.79
0.0069489 Eth
$65,135.00
3,465.962 LINK
0.0305%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.91
0.0069908 Eth
$54,384.00
2,881.241 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0254%
76
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.92
0.0069907 Eth
$52,883.00
52,012.183 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4580%
77
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.92
0.0069907 Eth
$47,102.00
2,481.654 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0219%
78
Hotcoin
LINK-ETH$18.83
0.0069541 Eth
$45,672.00
2,425.890 LINK
0.0214%
79
Binance US
LINK-USDT$18.83
0.0069589 Eth
$43,575.00
2,313.974 LINK
0.0204%
80
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.89
0.0069814 Eth
$42,839.00
55.748 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0005%
81
Mercado Bitcoin
LINK-BRL$18.82
0.0069563 Eth
$38,212.00
2,030.519 LINK
0.0179%
82
Bitexen
LINK-TRY$18.62
0.0068833 Eth
$31,887.00
1,712.415 LINK
0.0151%
83
EXMO
LINK-BTC$18.95
0.0070065 Eth
$27,944.00
1,474.718 LINK
0.0130%
84
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$18.88
0.0069786 Eth
$23,639.00
1,345.383 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0118%
85
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.84
0.0069622 Eth
$23,334.00
1,236.781 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0109%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.84
0.0069665 Eth
$23,110.00
1,241.761 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0109%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.90
0.0069825 Eth
$17,837.84
951.676 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0084%
88
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.57
0.0068640 Eth
$17,745.16
944.437 0X5947BB275C521040051D82396192181B413227A3
0.0083%
89
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.86
0.0069694 Eth
$14,971.98
58.256 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0005%
90
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.85
0.0069677 Eth
$14,912.67
822.488 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0072%
91
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.82
0.0069545 Eth
$11,668.87
11,546.886 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1017%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$18.82
0.0069534 Eth
$11,024.78
592.578 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0052%
93
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.92
0.0069925 Eth
$9,696.63
520.335 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0046%
94
CoinEx
LINK-USDC$18.90
0.0069857 Eth
$8,684.90
464.150 LINK
0.0041%
95
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.88
0.0069779 Eth
$7,795.22
429.291 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0038%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.89
0.0069757 Eth
$7,402.65
416.758 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0037%
97
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.81
0.0069570 Eth
$6,637.21
25.904 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0002%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.85
0.0069611 Eth
$5,362.69
284.016 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0025%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$18.73
0.0069216 Eth
$4,792.40
252.519 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0022%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$18.92
0.0069900 Eth
$4,510.70
240.423 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0021%

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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