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ERC-20
Oracle
Overview
Max Total Supply
1,000,000,000 LINK
Holders
729,316 ( 0.001%)
Market
Price
$23.49 @ 0.006479 ETH (-1.26%)
Onchain Market Cap
$23,490,000,000.00
Circulating Supply Market Cap
$14,824,260,379.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Coinbase Exchange | LINK-USD | $23.48 0.0064779 Eth | $29,872,554.00 1,272,092.750 LINK | 9.7918% |
2 | Slex | LINK-USDT | $23.46 0.0064801 Eth | $23,364,576.00 1,001,106.430 LINK | 7.7059% |
3 | Bitget | LINK-USDT | $23.54 0.0064924 Eth | $22,740,788.00 971,835.144 LINK | 7.4806% |
4 | P2B | LINK-USDT | $23.50 0.0064739 Eth | $19,145,044.00 814,607.250 LINK | 6.2703% |
5 | Bybit | LINK-USDT | $23.49 0.0064797 Eth | $18,910,320.00 808,017.869 LINK | 6.2196% |
6 | MEXC | LINK-USDT | $23.49 0.0064664 Eth | $18,737,301.00 797,817.480 LINK | 6.1411% |
7 | CoinW | LINK-USDT | $23.55 0.0064877 Eth | $17,040,130.00 723,607.970 LINK | 5.5699% |
8 | OKX | LINK-USDT | $23.49 0.0064787 Eth | $12,491,086.00 534,142.226 LINK | 4.1115% |
9 | DigiFinex | LINK-USDT | $23.50 0.0064840 Eth | $11,534,101.00 490,709.400 LINK | 3.7772% |
10 | Uniswap V3 (Ethereum) | 0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $23.54 0.0064948 Eth | $11,413,650.00 486,269.695 0X514910771AF9CA656AF840DFF83E8264ECF986CA | 3.7430% |
11 | HTX | LINK-USDT | $23.48 0.0064787 Eth | $9,668,235.00 414,288.952 LINK | 3.1889% |
12 | XT.COM | LINK-USDT | $23.49 0.0064789 Eth | $9,081,462.00 388,593.860 LINK | 2.9912% |
13 | Coinstore | LINK-USDT | $23.47 0.0064742 Eth | $8,190,815.00 350,527.220 LINK | 2.6981% |
14 | Biconomy.com | LINK-USDT | $23.46 0.0064710 Eth | $6,449,648.00 276,143.690 LINK | 2.1256% |
15 | Bithumb | LINK-KRW | $23.66 0.0065254 Eth | $5,986,086.00 253,049.288 LINK | 1.9478% |
16 | BYDFi | LINK-USDT | $23.48 0.0064758 Eth | $5,938,377.00 252,941.420 LINK | 1.9470% |
17 | Azbit | LINK-USDT | $23.49 0.0064787 Eth | $5,880,963.00 250,903.791 LINK | 1.9313% |
18 | Kraken | LINK-USD | $23.49 0.0064787 Eth | $5,186,719.00 220,843.382 LINK | 1.6999% |
19 | LATOKEN | LINK-USDT | $23.58 0.0064934 Eth | $4,486,910.00 190,316.630 LINK | 1.4649% |
20 | Uniswap V3 (Arbitrum One) | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $23.49 0.0064786 Eth | $3,212,933.00 137,402.959 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 1.0576% |
21 | Dex-Trade | LINK-USDT | $23.59 0.0064960 Eth | $2,948,781.00 125,023.290 LINK | 0.9624% |
22 | KuCoin | LINK-USDT | $23.49 0.0064799 Eth | $2,769,313.00 117,892.019 LINK | 0.9075% |
23 | CoinEx | LINK-USDT | $23.47 0.0064737 Eth | $2,681,727.00 114,579.214 LINK | 0.8820% |
24 | Hotcoin | LINK-USDT | $23.48 0.0064758 Eth | $2,585,001.00 110,107.640 LINK | 0.8475% |
25 | Bitvavo | LINK-EUR | $23.50 0.0064820 Eth | $2,420,881.00 103,016.609 LINK | 0.7930% |
26 | Coinbase Exchange | LINK-BTC | $23.48 0.0064754 Eth | $2,009,455.00 85,593.480 LINK | 0.6588% |
27 | Dcoin | LINK-USDT | $23.56 0.0064905 Eth | $1,814,290.00 77,009.000 LINK | 0.5928% |
28 | EXMO | LINK-USDT | $23.50 0.0064824 Eth | $1,274,299.00 54,227.443 LINK | 0.4174% |
29 | PointPay | LINK-USDT | $23.49 0.0064789 Eth | $1,246,407.00 53,380.464 LINK | 0.4109% |
30 | Bybit | LINK-USDC | $23.48 0.0064772 Eth | $1,240,456.00 52,755.950 LINK | 0.4061% |
31 | tanX | LINK-USDC | $23.48 0.0064773 Eth | $1,114,323.00 47,665.740 LINK | 0.3669% |
32 | Phemex | LINK-USDT | $23.54 0.0064924 Eth | $1,112,635.00 47,274.570 LINK | 0.3639% |
33 | Coinbase Exchange | LINK-EUR | $23.51 0.0064854 Eth | $915,186.00 38,927.170 LINK | 0.2996% |
34 | Bitbank | LINK-JPY | $23.52 0.0064886 Eth | $898,991.00 38,221.029 LINK | 0.2942% |
35 | WhiteBIT | LINK-BTC | $23.49 0.0064776 Eth | $822,740.00 35,027.070 LINK | 0.2696% |
36 | WhiteBIT | LINK-TRY | $23.52 0.0064754 Eth | $714,093.00 30,361.540 LINK | 0.2337% |
37 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $23.46 0.0064715 Eth | $713,225.00 30,453.394 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.2344% |
38 | Uniswap V3 (Ethereum) | 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA | $23.49 0.0064801 Eth | $631,023.00 41,519.946 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984 | 0.3196% |
39 | Coinbase Exchange | LINK-GBP | $23.50 0.0064838 Eth | $576,822.00 24,541.140 LINK | 0.1889% |
40 | EarnBIT | LINK-USDT | $23.45 0.0064680 Eth | $572,534.00 24,512.094 LINK | 0.1887% |
41 | itBit | LINK-USD | $23.54 0.0064731 Eth | $529,886.00 22,510.036 LINK | 0.1733% |
42 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $23.56 0.0065001 Eth | $527,388.00 22,424.670 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.1726% |
43 | Camelot V3 | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $23.46 0.0064724 Eth | $519,671.00 22,187.545 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 0.1708% |
44 | Slex | LINK-ETH | $23.45 0.0064691 Eth | $424,015.00 18,092.080 LINK | 0.1393% |
45 | Bitbegin | LINK-USDT | $23.48 0.0064643 Eth | $421,141.00 18,018.377 LINK | 0.1387% |
46 | BigONE | LINK-USDT | $23.40 0.0064546 Eth | $414,326.00 17,707.010 LINK | 0.1363% |
47 | Quickswap (v3) | 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | $23.54 0.0064934 Eth | $412,718.00 410,053.641 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359 | 3.1563% |
48 | Quickswap (v3) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $23.55 0.0064970 Eth | $386,100.00 16,414.886 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.1264% |
49 | Binance | LINK-TRY | $23.51 0.0064828 Eth | $369,768.00 15,829.460 LINK | 0.1218% |
50 | Gemini | LINK-USD | $23.46 0.0064729 Eth | $346,126.00 14,750.809 LINK | 0.1135% |
51 | BitMart | LINK-BTC | $23.47 0.0064746 Eth | $284,315.00 12,113.600 LINK | 0.0932% |
52 | GMO Japan | LINK-JPY | $23.58 0.0065030 Eth | $267,522.00 11,347.300 LINK | 0.0873% |
53 | Uniswap V3 (Ethereum) | 0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $23.54 0.0064948 Eth | $255,168.00 10,842.608 0X514910771AF9CA656AF840DFF83E8264ECF986CA | 0.0835% |
54 | Uniswap V3 (Polygon) | 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | $23.43 0.0064650 Eth | $244,864.00 244,597.708 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359 | 1.8828% |
55 | Bitci TR | LINK-TRY | $23.69 0.0065330 Eth | $240,628.00 10,324.990 LINK | 0.0795% |
56 | Coinbase Exchange | LINK-ETH | $23.52 0.0064866 Eth | $231,987.00 9,865.320 LINK | 0.0759% |
57 | LATOKEN | LINK-BTC | $23.48 0.0064762 Eth | $211,926.00 9,027.389 LINK | 0.0695% |
58 | OKX | LINK-USDC | $23.47 0.0064730 Eth | $208,871.00 8,930.195 LINK | 0.0687% |
59 | Coinone | LINK-KRW | $23.65 0.0065237 Eth | $203,762.00 8,616.091 LINK | 0.0663% |
60 | Uniswap V3 (Arbitrum One) | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9 | $23.48 0.0064760 Eth | $201,437.00 8,621.531 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 0.0664% |
61 | Binance US | LINK-USDT | $23.46 0.0064732 Eth | $164,491.00 7,010.168 LINK | 0.0540% |
62 | CoinEx | LINK-USDC | $23.51 0.0064735 Eth | $161,202.00 6,992.722 LINK | 0.0538% |
63 | PointPay | LINK-BTC | $23.49 0.0064786 Eth | $157,691.00 6,770.024 LINK | 0.0521% |
64 | Bitkub | LINK-THB | $23.36 0.0064466 Eth | $143,843.00 6,158.327 LINK | 0.0474% |
65 | BitStorage | LINK-ETH | $23.53 0.0064904 Eth | $142,714.00 6,066.080 LINK | 0.0467% |
66 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $23.53 0.0064899 Eth | $138,290.00 5,904.614 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0455% |
67 | Bitso | LINK-USD | $23.49 0.0064801 Eth | $130,271.00 5,545.179 LINK | 0.0427% |
68 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $23.47 0.0064753 Eth | $126,733.00 5,395.202 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0415% |
69 | BTCMarkets | LINK-AUD | $23.33 0.0064236 Eth | $117,879.00 5,052.172 LINK | 0.0389% |
70 | DeGate | 0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $23.53 0.0064895 Eth | $101,647.00 4,349.780 0X514910771AF9CA656AF840DFF83E8264ECF986CA | 0.0335% |
71 | Uniswap V3 (Optimism) | 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006 | $23.50 0.0064834 Eth | $97,971.00 4,171.539 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6 | 0.0321% |
72 | EXMO | LINK-BTC | $23.54 0.0064943 Eth | $96,958.00 4,118.454 LINK | 0.0317% |
73 | BitMart | LINK-ETH | $23.46 0.0064706 Eth | $96,368.00 4,108.380 LINK | 0.0316% |
74 | Hotcoin | LINK-BTC | $23.48 0.0064761 Eth | $89,416.00 3,808.450 LINK | 0.0293% |
75 | Uniswap V3 (Arbitrum One) | 0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | $23.49 0.0064786 Eth | $77,489.00 77,232.413 0XAF88D065E77C8CC2239327C5EDB3A432268E5831 | 0.5945% |
76 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174 | $23.44 0.0064667 Eth | $73,876.00 3,154.193 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0243% |
77 | CoinEx | LINK-BTC | $23.46 0.0064717 Eth | $52,095.00 2,217.057 LINK | 0.0171% |
78 | Mercado Bitcoin | LINK-BRL | $23.47 0.0064755 Eth | $49,464.00 2,107.088 LINK | 0.0162% |
79 | Uniswap V3 (Arbitrum One) | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F | $23.44 0.0064667 Eth | $48,213.00 2,061.645 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 0.0159% |
80 | Solidly V3 (Ethereum) | 0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $23.47 0.0064749 Eth | $40,536.00 1,728.218 0X514910771AF9CA656AF840DFF83E8264ECF986CA | 0.0133% |
81 | Uniswap V3 (BSC) | 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $23.49 0.0064783 Eth | $34,960.00 1,883.026 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD | 0.0145% |
82 | Korbit | LINK-KRW | $23.56 0.0064993 Eth | $32,830.00 1,394.596 LINK | 0.0107% |
83 | Hotcoin | LINK-ETH | $23.46 0.0064710 Eth | $30,651.00 1,306.540 LINK | 0.0101% |
84 | THENA FUSION | 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD | $23.49 0.0064783 Eth | $30,020.00 38.417 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827 | 0.0003% |
85 | Uniswap V3 (Arbitrum One) | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $23.44 0.0064647 Eth | $23,494.00 1,000.831 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 0.0077% |
86 | Gemini | LINK-BTC | $23.47 0.0064757 Eth | $21,338.00 908.963 LINK | 0.0070% |
87 | zondacrypto | LINK-PLN | $23.45 0.0064489 Eth | $20,817.00 887.713 LINK | 0.0068% |
88 | Dex-Trade | LINK-ETH | $23.47 0.0064767 Eth | $16,161.82 688.540 LINK | 0.0053% |
89 | Uniswap V3 (Ethereum) | 0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $23.51 0.0064859 Eth | $16,077.11 689.345 0X514910771AF9CA656AF840DFF83E8264ECF986CA | 0.0053% |
90 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F | $23.59 0.0065072 Eth | $14,794.98 631.481 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0049% |
91 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6 | $23.53 0.0064911 Eth | $11,742.42 501.865 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0039% |
92 | Uniswap V3 (Arbitrum One) | 0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | $23.58 0.0064969 Eth | $7,863.99 7,780.839 0XAF88D065E77C8CC2239327C5EDB3A432268E5831 | 0.0599% |
93 | Uniswap V3 (Polygon) | 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | $23.46 0.0064723 Eth | $6,277.96 6,260.146 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359 | 0.0482% |
94 | Uniswap V3 (BSC) | 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955 | $23.39 0.0064529 Eth | $4,573.62 195.609 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD | 0.0015% |
95 | Ace | LINK-USDT | $23.58 0.0064929 Eth | $3,639.06 155.630 LINK | 0.0012% |
96 | Uniswap V3 (Polygon) | 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B | $23.57 0.0064939 Eth | $3,262.07 137.502 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39 | 0.0011% |
97 | Uniswap V3 (Arbitrum One) | 0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | $23.47 0.0064822 Eth | $2,722.99 3,267.492 0X912CE59144191C1204E64559FE8253A0E49E6548 | 0.0252% |
98 | Uniswap V3 (Arbitrum One) | 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0 | $23.44 0.0064667 Eth | $1,713.24 72.528 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4 | 0.0006% |
99 | Uniswap V3 (BSC) | 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $23.47 0.0064736 Eth | $1,112.01 47.398 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD | 0.0004% |
100 | Uniswap V3 (BSC) | 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D | $23.52 0.0064954 Eth | $1,063.21 45.540 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD | 0.0004% |
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
- Callisto Network - April 14th, 2019 - Security Audit Report
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"transferAndCall","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"data","type":"bytes"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]
Contract Creation Code
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Deployed Bytecode
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Swarm Source
bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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