ETH Price: $2,395.98 (-3.30%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,160 ( 0.001%)

Market

Price

$10.83 @ 0.004520 ETH (-3.19%)

Onchain Market Cap

$10,830,000,000.00

Circulating Supply Market Cap

$6,786,470,447.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
121.65043711 LINK

Value
$1,317.47 ( ~0.549866122317785 Eth) [0.0000%]
0xDc909Aab63F7648636c82375e86320398eCBCAF7
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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 9745.45% |ETH 0.0003846 1075.25%

Market

Volume (24H):$525,823,276.00
Market Capitalization:$6,786,470,447.00
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
WhiteBIT
LINK-USDT$10.83
0.0045239 Eth
$22,515,118.00
2,079,380.880 LINK
13.0847%
2
Coinbase Exchange
LINK-USD$10.84
0.0045283 Eth
$20,901,521.00
1,928,362.510 LINK
12.1344%
3
Bybit
LINK-USDT$10.83
0.0045249 Eth
$18,558,957.00
1,713,225.317 LINK
10.7806%
4
HTX
LINK-USDT$10.83
0.0045250 Eth
$14,607,539.00
1,338,727.023 LINK
8.4241%
5
Bitget
LINK-USDT$10.83
0.0045253 Eth
$9,863,857.00
909,438.856 LINK
5.7227%
6
P2B
LINK-USDT$10.82
0.0045202 Eth
$6,848,878.00
633,047.560 LINK
3.9835%
7
Slex
LINK-USDT$10.81
0.0045172 Eth
$6,454,658.00
593,354.120 LINK
3.7337%
8
OKX
LINK-USDT$10.83
0.0045240 Eth
$6,002,127.00
554,350.304 LINK
3.4883%
9
Azbit
LINK-USDT$10.82
0.0045221 Eth
$5,233,870.00
481,246.972 LINK
3.0283%
10
DigiFinex
LINK-USDT$10.83
0.0045266 Eth
$4,508,925.00
416,148.240 LINK
2.6187%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.84
0.0045244 Eth
$4,461,164.00
417,205.106 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.6253%
12
Biconomy.com
LINK-USDT$10.82
0.0045217 Eth
$4,357,146.00
400,970.850 LINK
2.5231%
13
KuCoin
LINK-USDT$10.83
0.0045259 Eth
$4,070,277.00
375,720.448 LINK
2.3643%
14
XT.COM
LINK-USDT$10.81
0.0045142 Eth
$3,264,521.00
302,000.640 LINK
1.9004%
15
CoinW
LINK-USDT$10.81
0.0045141 Eth
$2,720,356.00
251,682.870 LINK
1.5837%
16
ProBit Global
LINK-USDT$10.82
0.0045192 Eth
$2,306,545.00
213,221.154 LINK
1.3417%
17
Coinstore
LINK-USDT$10.83
0.0045262 Eth
$2,117,324.00
195,543.550 LINK
1.2305%
18
Kraken
LINK-USD$10.82
0.0045215 Eth
$1,947,859.00
179,988.651 LINK
1.1326%
19
Trubit
LINK-USDT$10.82
0.0045235 Eth
$1,762,335.00
163,222.080 LINK
1.0271%
20
Bitunix
LINK-USDT$10.82
0.0045217 Eth
$1,692,311.00
156,335.250 LINK
0.9838%
21
AscendEX (BitMax)
LINK-USDT$10.86
0.0045391 Eth
$1,681,860.00
154,799.600 LINK
0.9741%
22
BYDFi
LINK-USDT$10.82
0.0045196 Eth
$1,668,443.00
154,219.650 LINK
0.9704%
23
FameEX
LINK-USDT$10.81
0.0045175 Eth
$1,385,388.00
128,130.400 LINK
0.8063%
24
BTSE
LINK-USDT$10.81
0.0045172 Eth
$1,237,205.00
114,465.610 LINK
0.7203%
25
Dex-Trade
LINK-USDT$10.83
0.0045239 Eth
$1,153,421.00
106,516.600 LINK
0.6703%
26
FMCPAY
LINK-USDT$10.80
0.0045138 Eth
$1,018,682.00
93,837.014 LINK
0.5905%
27
Azbit
LINK-ETH$10.82
0.0045209 Eth
$892,546.00
83,202.559 LINK
0.5236%
28
Bitexen
LINK-USDT$10.80
0.0045137 Eth
$859,950.00
79,623.720 LINK
0.5010%
29
Bitvavo
LINK-EUR$10.83
0.0045234 Eth
$822,056.00
75,929.239 LINK
0.4778%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.76
0.0044975 Eth
$813,415.00
76,339.009 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4804%
31
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.82
0.0045217 Eth
$775,264.00
71,453.137 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.4496%
32
Bitexen
LINK-TRY$10.82
0.0045228 Eth
$679,403.00
62,779.720 LINK
0.3950%
33
WhiteBIT
LINK-EUR$10.77
0.0045001 Eth
$630,686.00
58,554.590 LINK
0.3685%
34
tanX
LINK-USDC$10.81
0.0045096 Eth
$612,739.00
56,089.040 LINK
0.3529%
35
FMCPAY
LINK-BTC$10.82
0.0045205 Eth
$603,560.00
55,517.200 LINK
0.3493%
36
PointPay
LINK-USDT$10.79
0.0045039 Eth
$572,979.00
53,078.391 LINK
0.3340%
37
BigONE
LINK-USDT$10.85
0.0045312 Eth
$534,310.00
49,266.940 LINK
0.3100%
38
FMCPAY
LINK-ETH$10.81
0.0045169 Eth
$504,385.00
47,048.960 LINK
0.2961%
39
LATOKEN
LINK-USDT$10.83
0.0045238 Eth
$487,934.00
45,062.685 LINK
0.2836%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.83
0.0045233 Eth
$475,632.00
44,380.714 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2793%
41
EXMO
LINK-USDT$10.82
0.0045210 Eth
$445,104.00
41,132.869 LINK
0.2588%
42
ProBit Global
LINK-BTC$10.82
0.0045188 Eth
$409,276.00
37,837.870 LINK
0.2381%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.82
0.0045208 Eth
$404,892.00
37,768.879 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2377%
44
CoinEx
LINK-USDT$10.82
0.0045173 Eth
$399,177.00
36,542.242 LINK
0.2299%
45
Bybit
LINK-USDC$10.81
0.0045151 Eth
$397,410.00
36,806.650 LINK
0.2316%
46
Phemex
LINK-USDT$10.81
0.0045098 Eth
$377,344.00
34,905.970 LINK
0.2196%
47
EarnBIT
LINK-USDT$10.80
0.0045128 Eth
$285,238.00
26,376.102 LINK
0.1660%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.76
0.0044959 Eth
$261,831.00
24,534.211 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1544%
49
Coinbase Exchange
LINK-EUR$10.81
0.0045191 Eth
$222,378.00
20,564.620 LINK
0.1294%
50
LATOKEN
LINK-BTC$10.83
0.0045263 Eth
$214,100.00
19,762.293 LINK
0.1244%
51
OKX
LINK-USDC$10.85
0.0045352 Eth
$199,647.00
18,440.677 LINK
0.1160%
52
BitDelta
LINK-USDT$10.82
0.0045214 Eth
$172,350.00
15,882.000 LINK
0.0999%
53
BitMart
LINK-BTC$10.83
0.0045249 Eth
$168,723.00
15,578.300 LINK
0.0980%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.78
0.0045041 Eth
$161,818.00
14,896.792 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0937%
55
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.82
0.0045212 Eth
$157,886.00
14,562.630 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0916%
56
Bitbank
LINK-JPY$10.89
0.0045471 Eth
$148,190.00
13,610.872 LINK
0.0856%
57
BYDFi
LINK-USDC$10.81
0.0045153 Eth
$144,328.00
13,346.100 LINK
0.0840%
58
Coinbase Exchange
LINK-GBP$10.83
0.0045279 Eth
$141,487.00
13,058.800 LINK
0.0822%
59
Binance
LINK-TRY$10.87
0.0045382 Eth
$109,710.00
10,101.210 LINK
0.0636%
60
Bitci TR
LINK-TRY$10.92
0.0045619 Eth
$108,723.00
9,969.280 LINK
0.0627%
61
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.85
0.0045342 Eth
$104,085.00
103,929.340 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6540%
62
Slex
LINK-BTC$10.81
0.0045179 Eth
$100,733.00
9,308.900 LINK
0.0586%
63
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.76
0.0044975 Eth
$100,126.00
100,664.288 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6334%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.85
0.0045342 Eth
$96,764.00
8,930.768 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0562%
65
WhiteBIT
LINK-TRY$10.86
0.0045388 Eth
$82,336.00
7,579.320 LINK
0.0477%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.82
0.0045200 Eth
$80,365.00
7,528.176 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0474%
67
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.79
0.0045068 Eth
$77,437.00
7,336.175 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0462%
68
GMO Japan
LINK-JPY$10.88
0.0045459 Eth
$72,123.00
6,630.300 LINK
0.0417%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.81
0.0045177 Eth
$71,716.00
6,604.870 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0416%
70
Coinbase Exchange
LINK-ETH$10.82
0.0045202 Eth
$70,671.00
6,531.460 LINK
0.0411%
71
PointPay
LINK-BTC$10.82
0.0045177 Eth
$68,551.00
6,330.975 LINK
0.0398%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.76
0.0044975 Eth
$60,551.00
5,628.207 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0354%
73
Bitget
LINK-EUR$10.83
0.0045243 Eth
$58,845.00
5,418.300 LINK
0.0341%
74
Slex
LINK-ETH$10.82
0.0045233 Eth
$55,042.00
5,144.130 LINK
0.0324%
75
LATOKEN
LINK-ETH$10.80
0.0045115 Eth
$52,307.00
4,843.925 LINK
0.0305%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.83
0.0045229 Eth
$50,480.00
4,670.201 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0294%
77
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.82
0.0045240 Eth
$42,277.00
42,280.552 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2661%
78
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.78
0.0045071 Eth
$41,846.00
3,941.642 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0248%
79
EXMO
LINK-BTC$10.82
0.0045213 Eth
$37,929.00
3,504.931 LINK
0.0221%
80
Foxbit
LINK-BRL$10.92
0.0045625 Eth
$34,733.00
3,210.751 LINK
0.0202%
81
Mercado Bitcoin
LINK-BRL$10.91
0.0045606 Eth
$34,632.00
3,173.622 LINK
0.0200%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.77
0.0044990 Eth
$32,171.00
2,985.576 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0188%
83
KuCoin
LINK-BTC$10.82
0.0045204 Eth
$28,902.00
2,671.183 LINK
0.0168%
84
Bitso
LINK-USD$10.84
0.0045256 Eth
$27,994.00
2,583.399 LINK
0.0163%
85
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.82
0.0045210 Eth
$25,954.00
139,194.915 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.8759%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.82
0.0045189 Eth
$21,288.00
1,958.741 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0123%
87
Binance US
LINK-USDT$10.82
0.0045213 Eth
$18,189.08
1,681.248 LINK
0.0106%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.76
0.0044975 Eth
$13,041.97
13,141.822 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0827%
89
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.81
0.0045193 Eth
$11,442.30
1,084.790 0X5947BB275C521040051D82396192181B413227A3
0.0068%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.78
0.0045036 Eth
$8,114.27
748.039 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0047%
91
CoinEx
LINK-BTC$10.76
0.0044944 Eth
$7,807.90
725.091 LINK
0.0046%
92
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.76
0.0044947 Eth
$5,721.35
535.264 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0034%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.81
0.0045168 Eth
$4,909.36
458.093 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0029%
94
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.81
0.0045134 Eth
$4,098.92
379.573 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0024%
95
CoinEx
LINK-USDC$10.87
0.0045380 Eth
$3,267.16
302.421 LINK
0.0019%
96
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.76
0.0044949 Eth
$3,110.63
291.802 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0018%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.84
0.0045303 Eth
$2,824.11
260.531 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.81
0.0045157 Eth
$1,720.28
158.192 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0010%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.79
0.0045053 Eth
$1,417.35
131.057 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0008%
100
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$10.76
0.0044975 Eth
$790.84
73.032 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%

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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