ETH Price: $2,507.07 (-4.84%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,275 ( -0.031%)

Market

Price

$11.34 @ 0.004523 ETH (-6.25%)

Onchain Market Cap

$11,340,000,000.00

Circulating Supply Market Cap

$7,104,995,823.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xd4e4b54d5a87ea83e7b19fbc43fc421af2c2d7c1
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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 10209.09% |ETH 0.0003846 1076.03%

Market

Volume (24H):$428,609,888.00
Market Capitalization:$7,104,995,823.00
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
Binance
LINK-USDT$11.34
0.0045207 Eth
$30,024,403.00
2,585,757.810 LINK
14.1781%
2
WhiteBIT
LINK-USDT$11.32
0.0045104 Eth
$29,851,129.00
2,637,517.260 LINK
14.4619%
3
Coinbase Exchange
LINK-USD$11.31
0.0045087 Eth
$15,260,156.00
1,349,142.940 LINK
7.3975%
4
HTX
LINK-USDT$11.32
0.0045090 Eth
$12,614,127.00
1,090,179.023 LINK
5.9776%
5
Bitget
LINK-USDT$11.30
0.0045051 Eth
$9,675,544.00
836,658.412 LINK
4.5875%
6
Bybit
LINK-USDT$11.31
0.0045100 Eth
$9,468,415.00
816,564.044 LINK
4.4773%
7
BTSE
LINK-USDT$11.34
0.0045242 Eth
$7,575,288.00
668,069.574 LINK
3.6631%
8
OKX
LINK-USDT$11.31
0.0045056 Eth
$7,263,927.00
627,065.421 LINK
3.4383%
9
Upbit
LINK-KRW$11.42
0.0045530 Eth
$6,688,119.00
585,723.532 LINK
3.2116%
10
Gate.io
LINK-USDT$11.31
0.0045094 Eth
$5,572,412.00
478,199.220 LINK
2.6220%
11
Slex
LINK-USDT$11.34
0.0045213 Eth
$5,294,733.00
457,706.760 LINK
2.5097%
12
P2B
LINK-USDT$11.33
0.0045146 Eth
$5,037,380.00
444,638.500 LINK
2.4380%
13
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.31
0.0045060 Eth
$4,970,689.00
433,932.520 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.3793%
14
Azbit
LINK-USDT$11.33
0.0045155 Eth
$4,345,220.00
374,585.390 LINK
2.0539%
15
DigiFinex
LINK-USDT$11.31
0.0045111 Eth
$4,153,627.00
367,143.720 LINK
2.0131%
16
Biconomy.com
LINK-USDT$11.33
0.0045179 Eth
$3,864,519.00
333,665.840 LINK
1.8295%
17
XT.COM
LINK-USDT$11.34
0.0045274 Eth
$3,008,013.00
259,042.660 LINK
1.4204%
18
ProBit Global
LINK-USDT$11.34
0.0045257 Eth
$2,975,689.00
262,330.279 LINK
1.4384%
19
Bitunix
LINK-USDT$11.33
0.0045175 Eth
$2,938,936.00
259,223.730 LINK
1.4214%
20
CoinW
LINK-USDT$11.32
0.0045238 Eth
$2,910,013.00
257,120.410 LINK
1.4098%
21
Trubit
LINK-USDT$11.34
0.0045188 Eth
$2,497,089.00
215,132.660 LINK
1.1796%
22
Hotcoin
LINK-USDT$11.31
0.0045178 Eth
$2,482,590.00
219,453.810 LINK
1.2033%
23
Coinstore
LINK-USDT$11.32
0.0045136 Eth
$2,133,373.00
183,737.590 LINK
1.0075%
24
KuCoin
LINK-USDT$11.31
0.0045095 Eth
$2,104,620.00
186,097.243 LINK
1.0204%
25
LBank
LINK-USDT$11.32
0.0045123 Eth
$2,020,004.00
178,403.200 LINK
0.9782%
26
AscendEX (BitMax)
LINK-USDT$11.32
0.0045120 Eth
$1,679,639.00
148,437.800 LINK
0.8139%
27
BYDFi
LINK-USDT$11.33
0.0045241 Eth
$1,424,809.00
125,769.050 LINK
0.6896%
28
WhiteBIT
LINK-BTC$11.34
0.0045203 Eth
$1,343,353.00
118,443.380 LINK
0.6494%
29
Bitvavo
LINK-EUR$11.34
0.0045221 Eth
$1,134,389.00
100,049.143 LINK
0.5486%
30
HashKey Global
LINK-USDT$11.34
0.0045203 Eth
$1,007,469.00
83,553.547 LINK
0.4581%
31
Dex-Trade
LINK-USDT$11.32
0.0045134 Eth
$943,826.00
83,383.240 LINK
0.4572%
32
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.36
0.0045303 Eth
$880,945.00
76,979.013 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4221%
33
Azbit
LINK-ETH$11.33
0.0045174 Eth
$818,633.00
71,545.849 LINK
0.3923%
34
CoinEx
LINK-USDT$11.30
0.0045072 Eth
$724,314.00
62,190.297 LINK
0.3410%
35
BigONE
LINK-USDT$11.28
0.0045065 Eth
$645,256.00
57,218.480 LINK
0.3137%
36
EXMO
LINK-USDT$11.31
0.0045088 Eth
$633,458.00
56,021.331 LINK
0.3072%
37
LATOKEN
LINK-BTC$11.32
0.0045098 Eth
$609,114.00
53,816.487 LINK
0.2951%
38
LATOKEN
LINK-USDT$11.33
0.0045280 Eth
$575,225.00
50,777.705 LINK
0.2784%
39
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.30
0.0045066 Eth
$524,910.00
46,133.779 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2530%
40
PointPay
LINK-USDT$11.31
0.0045084 Eth
$501,001.00
43,151.394 LINK
0.2366%
41
ProBit Global
LINK-BTC$11.33
0.0045182 Eth
$487,768.00
43,047.942 LINK
0.2360%
42
tanX
LINK-USDC$11.33
0.0045144 Eth
$454,994.00
39,317.500 LINK
0.2156%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.34
0.0045200 Eth
$443,226.00
38,563.387 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2114%
44
Gemini
LINK-USD$11.31
0.0045090 Eth
$377,742.00
33,393.691 LINK
0.1831%
45
EarnBIT
LINK-USDT$11.34
0.0045196 Eth
$351,733.00
30,347.838 LINK
0.1664%
46
Bybit
LINK-USDC$11.35
0.0045246 Eth
$336,393.00
29,143.775 LINK
0.1598%
47
WhiteBIT
LINK-EUR$11.33
0.0045140 Eth
$314,054.00
27,728.590 LINK
0.1520%
48
Phemex
LINK-USDT$11.33
0.0045167 Eth
$303,203.00
26,757.060 LINK
0.1467%
49
WhiteBIT
LINK-TRY$11.34
0.0045267 Eth
$297,001.00
26,201.340 LINK
0.1437%
50
Bitbank
LINK-JPY$11.39
0.0045391 Eth
$241,424.00
21,200.436 LINK
0.1162%
51
GMO Japan
LINK-JPY$11.36
0.0045252 Eth
$231,591.00
20,391.800 LINK
0.1118%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.33
0.0045127 Eth
$206,142.00
17,873.935 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0980%
53
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.36
0.0045279 Eth
$199,404.00
17,208.466 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0944%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.30
0.0045075 Eth
$197,927.00
17,354.471 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0952%
55
BitMart
LINK-BTC$11.34
0.0045182 Eth
$192,009.00
16,934.780 LINK
0.0929%
56
Slex
LINK-BTC$11.33
0.0045252 Eth
$187,610.00
16,465.300 LINK
0.0903%
57
Coinbase Exchange
LINK-GBP$11.34
0.0045189 Eth
$183,316.00
16,170.320 LINK
0.0887%
58
BYDFi
LINK-USDC$11.35
0.0045233 Eth
$183,022.00
16,126.400 LINK
0.0884%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.34
0.0045200 Eth
$166,738.00
170,322.533 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.9339%
60
BitDelta
LINK-USDT$11.31
0.0045093 Eth
$153,858.00
13,276.000 LINK
0.0728%
61
OKX
LINK-USDC$11.33
0.0045142 Eth
$136,024.00
11,716.799 LINK
0.0642%
62
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.31
0.0045060 Eth
$131,521.00
11,453.107 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0628%
63
PointPay
LINK-BTC$11.31
0.0045083 Eth
$120,119.00
10,534.971 LINK
0.0578%
64
Bitci TR
LINK-TRY$11.42
0.0045518 Eth
$119,710.00
10,329.930 LINK
0.0566%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.30
0.0045035 Eth
$119,040.00
122,435.872 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6713%
66
Coinbase Exchange
LINK-ETH$11.33
0.0045173 Eth
$114,535.00
10,109.970 LINK
0.0554%
67
Binance US
LINK-USDT$11.32
0.0045195 Eth
$100,011.00
8,834.371 LINK
0.0484%
68
Slex
LINK-ETH$11.33
0.0045192 Eth
$88,117.00
7,704.070 LINK
0.0422%
69
Bitso
LINK-USD$11.32
0.0045129 Eth
$85,085.00
7,514.189 LINK
0.0412%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.34
0.0045200 Eth
$60,815.00
5,261.432 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0288%
71
Bitkub
LINK-THB$11.37
0.0045322 Eth
$51,771.00
4,551.933 LINK
0.0250%
72
BitStorage
LINK-ETH$11.34
0.0045212 Eth
$49,571.00
4,371.890 LINK
0.0240%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.33
0.0045188 Eth
$46,578.00
4,026.962 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0221%
74
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.30
0.0045066 Eth
$39,120.00
40,205.268 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2205%
75
EXMO
LINK-BTC$11.31
0.0045083 Eth
$33,861.00
2,993.256 LINK
0.0164%
76
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.37
0.0045347 Eth
$33,630.00
2,939.825 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0161%
77
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.36
0.0045294 Eth
$30,181.00
2,646.841 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0145%
78
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.27
0.0044945 Eth
$26,970.00
2,354.786 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0129%
79
Bitcointry
LINK-USDT$11.33
0.0045167 Eth
$25,294.00
2,197.635 LINK
0.0120%
80
Foxbit
LINK-BRL$11.43
0.0045612 Eth
$21,066.00
1,811.211 LINK
0.0099%
81
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.36
0.0045303 Eth
$20,545.00
21,036.372 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1153%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.34
0.0045200 Eth
$16,430.81
1,426.382 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0078%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.33
0.0045197 Eth
$16,350.06
1,430.188 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0078%
84
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.36
0.0045279 Eth
$13,579.37
7,867.928 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0431%
85
CoinEx
LINK-USDC$11.37
0.0045380 Eth
$13,504.44
1,186.061 LINK
0.0065%
86
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.39
0.0045431 Eth
$12,369.54
1,081.594 0X5947BB275C521040051D82396192181B413227A3
0.0059%
87
KuCoin
LINK-KCS$11.30
0.0045044 Eth
$11,987.75
1,061.203 LINK
0.0058%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.30
0.0045022 Eth
$10,126.87
882.972 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
89
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.34
0.0045216 Eth
$9,569.71
837.340 0X5947BB275C521040051D82396192181B413227A3
0.0046%
90
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$11.31
0.0045060 Eth
$8,627.96
752.078 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0041%
91
CoinEx
LINK-BTC$11.29
0.0045144 Eth
$7,138.37
630.668 LINK
0.0035%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.34
0.0045209 Eth
$6,933.91
600.023 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0033%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.34
0.0045245 Eth
$5,301.53
458.373 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.35
0.0045251 Eth
$5,087.92
446.771 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0024%
95
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$11.31
0.0045072 Eth
$3,843.19
27.152 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.35
0.0045269 Eth
$1,924.24
166.085 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0009%
97
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$11.24
0.0044794 Eth
$1,316.42
113.226 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0006%
98
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$11.37
0.0045318 Eth
$1,132.13
1,156.382 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0063%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$11.31
0.0045177 Eth
$1,033.24
87.947 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.30
0.0045084 Eth
$1,030.25
88.584 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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