Overview
Max Total Supply
146,742.45390795 WBTC
Holders
103,118 ( -0.022%)
Market
Price
$71,834.00 @ 26.755347 ETH (+0.14%)
Onchain Market Cap
$10,541,097,434.02
Circulating Supply Market Cap
$10,556,340,383.00
Other Info
Token Contract (WITH 8 Decimals)
Balance
0.00002466 WBTCValue
$1.77 ( ~0.000659255559696727 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $71,818.00 26.7589450 Eth | $28,887,138.00 400.970 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0003% |
2 | Dexalot | WBTC-USDC | $72,105.00 26.5933690 Eth | $26,131,511.00 361.830 WBTC | 0.0003% |
3 | Bitrue | WBTC-BTC | $71,833.00 26.7539600 Eth | $23,313,852.00 324.556 WBTC | 0.0003% |
4 | Binance | WBTC-BTC | $71,750.00 26.7665210 Eth | $20,652,765.00 287.885 WBTC | 0.0002% |
5 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $71,600.00 26.6774910 Eth | $13,551,930.00 187.455 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0002% |
6 | Binance | WBTC-USDT | $71,796.00 26.7437760 Eth | $12,566,509.00 173.214 WBTC | 0.0001% |
7 | Uniswap V3 (Ethereum) | 0XCBB7C0000AB88B473B1F5AFD9EF808440EED33BF-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,893.00 26.7796270 Eth | $5,010,016.00 69.553 0XCBB7C0000AB88B473B1F5AFD9EF808440EED33BF | 0.0001% |
8 | Vertex (Spot) | WBTC-USDC | $71,739.00 26.7628430 Eth | $4,762,727.00 66.016 WBTC | 0.0001% |
9 | Niza Global | WBTC-BTC | $71,906.00 26.7400520 Eth | $3,555,874.00 49.417 WBTC | 0.0000% |
10 | Kraken | WBTC-XBT | $71,774.00 26.7422950 Eth | $3,546,661.00 49.414 WBTC | 0.0000% |
11 | Uniswap V3 (Ethereum) | 0X18084FBA666A33D37592FA2633FD49A74DD93A88-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $3,387,053.00 47.209 0X18084FBA666A33D37592FA2633FD49A74DD93A88 | 0.0000% |
12 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $71,574.00 26.6678910 Eth | $3,254,548.00 45.007 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
13 | Curve (Ethereum) | 0X18084FBA666A33D37592FA2633FD49A74DD93A88-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,480.00 26.6173550 Eth | $2,905,537.00 40.741 0X18084FBA666A33D37592FA2633FD49A74DD93A88 | 0.0000% |
14 | Tokpie | WBTC-USDT | $71,937.00 26.7887140 Eth | $1,961,854.00 27.272 WBTC | 0.0000% |
15 | Uniswap V3 (Ethereum) | 0X8236A87084F8B84306F72007F36F2618A5634494-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $1,926,717.00 26.786 0X8236A87084F8B84306F72007F36F2618A5634494 | 0.0000% |
16 | Bybit | WBTC-BTC | $71,843.00 26.7588070 Eth | $1,831,139.00 25.505 WBTC | 0.0000% |
17 | Curve (Ethereum) | 0X657E8C867D8B37DCC18FA4CAEAD9C45EB088C642-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,555.00 26.6303310 Eth | $1,567,819.00 21.869 0X657E8C867D8B37DCC18FA4CAEAD9C45EB088C642 | 0.0000% |
18 | Coinbase Exchange | WBTC-BTC | $71,806.00 26.7573580 Eth | $1,450,575.00 20.201 WBTC | 0.0000% |
19 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $71,802.00 26.7527780 Eth | $1,311,274.00 18.075 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
20 | Uniswap V3 (Ethereum) | 0XCBB7C0000AB88B473B1F5AFD9EF808440EED33BF-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,893.00 26.7796270 Eth | $1,073,313.00 14.902 0XCBB7C0000AB88B473B1F5AFD9EF808440EED33BF | 0.0000% |
21 | Binance | WBTC-ETH | $71,825.00 26.7543000 Eth | $1,044,038.00 14.362 WBTC | 0.0000% |
22 | Coinbase Exchange | WBTC-USD | $71,797.00 26.7540160 Eth | $925,741.00 12.894 WBTC | 0.0000% |
23 | Curve (Ethereum) | 0X8236A87084F8B84306F72007F36F2618A5634494-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $73,188.00 26.9759860 Eth | $893,312.00 12.172 0X8236A87084F8B84306F72007F36F2618A5634494 | 0.0000% |
24 | Bitunix | WBTC-USDT | $71,758.00 26.7364580 Eth | $880,960.00 12.277 WBTC | 0.0000% |
25 | Azbit | WBTC-ETH | $71,773.00 26.7647900 Eth | $707,907.00 9.691 WBTC | 0.0000% |
26 | QMall | WBTC-BTC | $71,756.00 26.7643350 Eth | $691,495.00 9.638 WBTC | 0.0000% |
27 | Sushiswap | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $71,807.00 26.7547290 Eth | $652,297.00 8.967 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
28 | Bybit | WBTC-USDT | $71,783.00 26.7362860 Eth | $510,955.00 7.044 WBTC | 0.0000% |
29 | Curve (Ethereum) | 0X8236A87084F8B84306F72007F36F2618A5634494-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,477.00 26.6252410 Eth | $421,022.00 5.885 0X8236A87084F8B84306F72007F36F2618A5634494 | 0.0000% |
30 | DigiFinex | WBTC-BTC | $71,854.00 26.7653520 Eth | $410,201.00 5.709 WBTC | 0.0000% |
31 | Kraken | WBTC-USD | $71,769.00 26.7404730 Eth | $361,519.00 5.037 WBTC | 0.0000% |
32 | Uniswap V3 (Ethereum) | 0X18084FBA666A33D37592FA2633FD49A74DD93A88-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,988.00 26.8221160 Eth | $341,933.00 4.761 0X18084FBA666A33D37592FA2633FD49A74DD93A88 | 0.0000% |
33 | Azbit | WBTC-USDT | $71,689.00 26.7395500 Eth | $341,266.00 4.723 WBTC | 0.0000% |
34 | Pionex | WBTC-BTC | $71,786.00 26.7607580 Eth | $331,019.00 4.612 WBTC | 0.0000% |
35 | MEXC | WBTC-USDT | $71,893.00 26.7700330 Eth | $270,993.00 3.769 WBTC | 0.0000% |
36 | Curve (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $72,388.00 26.6809370 Eth | $270,810.00 3.679 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
37 | Azbit | WBTC-BTC | $71,802.00 26.7527430 Eth | $261,662.00 3.644 WBTC | 0.0000% |
38 | Uniswap V3 (Ethereum) | 0X3472A5A71965499ACD81997A54BBA8D852C6E53D-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,473.00 26.6302810 Eth | $238,305.00 77,912.749 0X3472A5A71965499ACD81997A54BBA8D852C6E53D | 0.0625% |
39 | CoinTR | WBTC-USDT | $71,680.00 26.7302830 Eth | $192,758.00 2.667 WBTC | 0.0000% |
40 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $72,429.00 26.9865150 Eth | $189,456.00 2.565 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
41 | Uniswap V3 (Ethereum) | 0X661C70333AA1850CCDBAE82776BB436A0FCFEEFB-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $188,941.00 2.628 0X661C70333AA1850CCDBAE82776BB436A0FCFEEFB | 0.0000% |
42 | OKX | WBTC-BTC | $71,802.00 26.7527430 Eth | $179,469.00 2.500 WBTC | 0.0000% |
43 | Curve (Ethereum) | 0XDAC17F958D2EE523A2206206994597C13D831EC7-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,460.00 26.6159710 Eth | $168,398.00 170,324.176 0XDAC17F958D2EE523A2206206994597C13D831EC7 | 0.1365% |
44 | OKX | WBTC-USDT | $71,857.00 26.7732870 Eth | $150,013.00 2.080 WBTC | 0.0000% |
45 | BingX | WBTC-USDT | $71,774.00 26.7413770 Eth | $142,714.00 1.968 WBTC | 0.0000% |
46 | Tokpie | DAF-WBTC | $71,802.00 26.7527430 Eth | $121,899.00 115,114,105.840 DAF | 92.2714% |
47 | Curve (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $72,013.00 26.6002900 Eth | $103,105.00 1.413 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
48 | Curve (Ethereum) | 0XDAC17F958D2EE523A2206206994597C13D831EC7-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $72,195.00 26.6098520 Eth | $97,875.00 98,219.010 0XDAC17F958D2EE523A2206206994597C13D831EC7 | 0.0787% |
49 | Bitget | WBTC-USDT | $71,803.00 26.7438820 Eth | $97,691.00 1.352 WBTC | 0.0000% |
50 | BitMart | WBTC-USDT | $71,754.00 26.7379280 Eth | $92,172.00 1.285 WBTC | 0.0000% |
51 | Nominex | WBTC-USDT | $71,689.00 26.7107250 Eth | $90,269.00 1.259 WBTC | 0.0000% |
52 | Uniswap V3 (Ethereum) | 0X9BE89D2A4CD102D8FECC6BF9DA793BE995C22541-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,310.00 26.5693710 Eth | $90,168.00 1.268 0X9BE89D2A4CD102D8FECC6BF9DA793BE995C22541 | 0.0000% |
53 | DeGate | ETH-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,613.00 26.7040560 Eth | $80,540.00 30.528 ETH | 0.0000% |
54 | Uniswap V3 (Ethereum) | 0XF469FBD2ABCD6B9DE8E169D128226C0FC90A012E-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $72,840.00 1.014 0XF469FBD2ABCD6B9DE8E169D128226C0FC90A012E | 0.0000% |
55 | Osmosis | IBC/D1542AA8762DB13087D8364F3EA6509FD6F009A34F00426AF9E4F9FA85CBBF1F-UOSMO | $71,757.00 26.7267110 Eth | $60,801.00 0.847 IBC/D1542AA8762DB13087D8364F3EA6509FD6F009A34F00426AF9E4F9FA85CBBF1F | 0.0000% |
56 | Tokpie | CAKE-WBTC | $71,802.00 26.7527430 Eth | $60,322.00 33,266.059 CAKE | 0.0267% |
57 | Balancer V2 | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $72,211.00 26.5937040 Eth | $58,006.00 0.786 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
58 | HitBTC | WBTC-ETH | $71,736.00 26.7453610 Eth | $57,778.00 0.793 WBTC | 0.0000% |
59 | FMFW.io | WBTC-ETH | $71,741.00 26.7437100 Eth | $56,908.00 0.793 WBTC | 0.0000% |
60 | Osmosis | IBC/D1542AA8762DB13087D8364F3EA6509FD6F009A34F00426AF9E4F9FA85CBBF1F-UOSMO | $71,775.00 26.7335180 Eth | $52,032.00 0.725 IBC/D1542AA8762DB13087D8364F3EA6509FD6F009A34F00426AF9E4F9FA85CBBF1F | 0.0000% |
61 | Gate.io | WBTC-BTC | $71,820.00 26.7627160 Eth | $40,920.00 0.570 WBTC | 0.0000% |
62 | Uniswap V3 (Ethereum) | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0X6B175474E89094C44DA98B954EEDEAC495271D0F | $71,868.00 26.7774640 Eth | $36,919.00 0.509 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
63 | Curve (Ethereum) | 0XEB4C2781E4EBA804CE9A9803C67D0893436BB27D-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,513.00 26.6286540 Eth | $36,543.00 0.515 0XEB4C2781E4EBA804CE9A9803C67D0893436BB27D | 0.0000% |
64 | Uniswap V3 (Ethereum) | 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,893.00 26.7796270 Eth | $35,231.00 231.351 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9 | 0.0002% |
65 | Curve (Ethereum) | 0X7A56E1C57C7475CCF742A1832B028F0456652F97-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,470.00 26.6213750 Eth | $29,370.00 0.411 0X7A56E1C57C7475CCF742A1832B028F0456652F97 | 0.0000% |
66 | Phemex | WBTC-USDT | $71,790.00 26.7413320 Eth | $25,689.00 0.358 WBTC | 0.0000% |
67 | Kanga | WBTC-BTC | $71,878.00 26.7983200 Eth | $24,432.00 0.000 WBTC | 0.0000% |
68 | Uniswap V3 (Ethereum) | 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $22,911.00 2,869.334 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984 | 0.0023% |
69 | KuCoin | WBTC-BTC | $71,878.00 26.7741940 Eth | $20,931.00 0.291 WBTC | 0.0000% |
70 | Crypto.com Exchange | WBTC-USD | $71,723.00 26.7140930 Eth | $20,642.00 0.288 WBTC | 0.0000% |
71 | Tokpie | GEM-WBTC | $71,788.00 26.7562020 Eth | $18,983.84 4,170,697.380 GEM | 3.3431% |
72 | Verse | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $71,322.00 26.5729570 Eth | $17,740.99 0.244 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
73 | Niza Global | WBTC-EUR | $71,750.00 26.7334310 Eth | $17,598.18 0.243 WBTC | 0.0000% |
74 | Kraken | WBTC-EUR | $71,750.00 26.7334310 Eth | $17,466.64 0.243 WBTC | 0.0000% |
75 | HitBTC | WBTC-BTC | $71,797.00 26.7500320 Eth | $11,441.97 0.159 WBTC | 0.0000% |
76 | OKX | WBTC-USDC | $71,745.00 26.7307100 Eth | $11,393.32 0.159 WBTC | 0.0000% |
77 | FMFW.io | WBTC-BTC | $71,590.00 26.7152370 Eth | $11,387.46 0.159 WBTC | 0.0000% |
78 | HitBTC | WBTC-USDT | $71,841.00 26.7673960 Eth | $10,012.44 0.138 WBTC | 0.0000% |
79 | FMFW.io | WBTC-USDT | $71,815.00 26.7715030 Eth | $9,903.26 0.138 WBTC | 0.0000% |
80 | Uniswap V2 (Ethereum) | 0XDFC5964141C018485B4D017634660F85AA667714-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,803.00 26.7532170 Eth | $8,738.48 529,409.550 0XDFC5964141C018485B4D017634660F85AA667714 | 0.4244% |
81 | CoinEx | WBTC-BTC | $71,933.00 26.7979610 Eth | $7,535.93 0.105 WBTC | 0.0000% |
82 | Nominex | WBTC-ETH | $71,790.00 26.7513980 Eth | $6,517.48 0.091 WBTC | 0.0000% |
83 | Crypto.com Exchange | WBTC-BTC | $71,721.00 26.7132620 Eth | $6,462.04 0.090 WBTC | 0.0000% |
84 | Uniswap V3 (Ethereum) | 0XC96DE26018A54D51C097160568752C4E3BD6C364-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,868.00 26.7774640 Eth | $6,448.41 0.090 0XC96DE26018A54D51C097160568752C4E3BD6C364 | 0.0000% |
85 | Osmosis | IBC/498A0751C798A0D9A389AA3691123DADA57DAA4FE165D5C75894505B876BA6E4-IBC/D1542AA8762DB13087D8364F3EA6509FD6F009A34F00426AF9E4F9FA85CBBF1F | $71,787.00 26.7403540 Eth | $5,294.28 5,292.673 IBC/498A0751C798A0D9A389AA3691123DADA57DAA4FE165D5C75894505B876BA6E4 | 0.0042% |
86 | Gate.io | WBTC-USDT | $71,796.00 26.7536520 Eth | $4,938.66 0.068 WBTC | 0.0000% |
87 | Stellaswap (V3) | 0XE57EBD2D67B462E9926E04A8E33F01CD0D64346D-0XACC15DC74880C9944775448304B263D191C6077F | $72,143.00 26.8736410 Eth | $4,830.96 0.066 0XE57EBD2D67B462E9926E04A8E33F01CD0D64346D | 0.0000% |
88 | Bitvavo | WBTC-EUR | $72,080.00 26.8852510 Eth | $4,244.69 0.059 WBTC | 0.0000% |
89 | Uniswap V3 (Ethereum) | 0X927402AB67C0CDA3C187E9DFE34554AC581441F2-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $72,277.00 26.6432310 Eth | $3,895.76 4,551,280.552 0X927402AB67C0CDA3C187E9DFE34554AC581441F2 | 3.6481% |
90 | Kujira Fin | WBTC-USK | $71,925.00 26.7887150 Eth | $3,174.48 0.044 WBTC | 0.0000% |
91 | Kujira Fin | WBTC-MNTA | $72,254.00 26.9112330 Eth | $3,055.50 0.042 WBTC | 0.0000% |
92 | CEX.IO | WBTC-USDT | $71,837.00 26.7623300 Eth | $3,027.99 0.041 WBTC | 0.0000% |
93 | Curve (Ethereum) | 0XEB4C2781E4EBA804CE9A9803C67D0893436BB27D-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $71,477.00 26.6252410 Eth | $1,513.61 0.021 0XEB4C2781E4EBA804CE9A9803C67D0893436BB27D | 0.0000% |
94 | Kujira Fin | WBTC-KUJI | $72,067.00 26.8933760 Eth | $1,504.83 0.021 WBTC | 0.0000% |
95 | KuCoin | WBTC-USDT | $71,722.00 26.7231120 Eth | $337.09 0.005 WBTC | 0.0000% |
96 | FMFW.io | WBTC-USDC | $71,800.00 26.6941660 Eth | $43.73 0.001 WBTC | 0.0000% |
97 | HitBTC | WBTC-USDC | $71,816.00 26.7750660 Eth | $42.66 0.001 WBTC | 0.0000% |
98 | CEX.IO | WBTC-USDC | $72,068.00 26.8549640 Eth | $28.97 0.000 WBTC | 0.0000% |
99 | CEX.IO | WBTC-EUR | $72,087.00 26.8552910 Eth | $24.01 0.000 WBTC | 0.0000% |
100 | CEX.IO | WBTC-USD | $71,819.00 26.7622220 Eth | $17.07 0.000 WBTC | 0.0000% |
Contract Name:
WBTC
Compiler Version
v0.4.24+commit.e67f0147
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-11-24 */ pragma solidity 0.4.24; // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * See https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } // File: openzeppelin-solidity/contracts/math/SafeMath.sol /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure 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 _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } // File: openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @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) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit 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) public view returns (uint256) { return balances[_owner]; } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } // File: openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/issues/20 * 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)) internal 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 ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @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 returns (bool) { allowed[msg.sender][_spender] = _value; emit 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 ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a 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 * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } // File: openzeppelin-solidity/contracts/token/ERC20/DetailedERC20.sol /** * @title DetailedERC20 token * @dev The decimals are only for visualization purposes. * All the operations are done using the smallest and indivisible token unit, * just as on Ethereum all the operations are done in wei. */ contract DetailedERC20 is ERC20 { string public name; string public symbol; uint8 public decimals; constructor(string _name, string _symbol, uint8 _decimals) public { name = _name; symbol = _symbol; decimals = _decimals; } } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } // File: openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol /** * @title Mintable token * @dev Simple ERC20 Token example, with mintable token creation * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol */ contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } // File: openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); /** * @dev Burns a specific amount of tokens. * @param _value The amount of token to be burned. */ function burn(uint256 _value) public { _burn(msg.sender, _value); } function _burn(address _who, uint256 _value) internal { require(_value <= balances[_who]); // no need to require value <= totalSupply, since that would imply the // sender's balance is greater than the totalSupply, which *should* be an assertion failure balances[_who] = balances[_who].sub(_value); totalSupply_ = totalSupply_.sub(_value); emit Burn(_who, _value); emit Transfer(_who, address(0), _value); } } // File: openzeppelin-solidity/contracts/lifecycle/Pausable.sol /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() public onlyOwner whenNotPaused { paused = true; emit Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() public onlyOwner whenPaused { paused = false; emit Unpause(); } } // File: openzeppelin-solidity/contracts/token/ERC20/PausableToken.sol /** * @title Pausable token * @dev StandardToken modified with pausable transfers. **/ contract PausableToken is StandardToken, Pausable { function transfer( address _to, uint256 _value ) public whenNotPaused returns (bool) { return super.transfer(_to, _value); } function transferFrom( address _from, address _to, uint256 _value ) public whenNotPaused returns (bool) { return super.transferFrom(_from, _to, _value); } function approve( address _spender, uint256 _value ) public whenNotPaused returns (bool) { return super.approve(_spender, _value); } function increaseApproval( address _spender, uint _addedValue ) public whenNotPaused returns (bool success) { return super.increaseApproval(_spender, _addedValue); } function decreaseApproval( address _spender, uint _subtractedValue ) public whenNotPaused returns (bool success) { return super.decreaseApproval(_spender, _subtractedValue); } } // File: openzeppelin-solidity/contracts/ownership/Claimable.sol /** * @title Claimable * @dev Extension for the Ownable contract, where the ownership needs to be claimed. * This allows the new owner to accept the transfer. */ contract Claimable is Ownable { address public pendingOwner; /** * @dev Modifier throws if called by any account other than the pendingOwner. */ modifier onlyPendingOwner() { require(msg.sender == pendingOwner); _; } /** * @dev Allows the current owner to set the pendingOwner address. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { pendingOwner = newOwner; } /** * @dev Allows the pendingOwner address to finalize the transfer. */ function claimOwnership() public onlyPendingOwner { emit OwnershipTransferred(owner, pendingOwner); owner = pendingOwner; pendingOwner = address(0); } } // File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure. * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { function safeTransfer( ERC20Basic _token, address _to, uint256 _value ) internal { require(_token.transfer(_to, _value)); } function safeTransferFrom( ERC20 _token, address _from, address _to, uint256 _value ) internal { require(_token.transferFrom(_from, _to, _value)); } function safeApprove( ERC20 _token, address _spender, uint256 _value ) internal { require(_token.approve(_spender, _value)); } } // File: openzeppelin-solidity/contracts/ownership/CanReclaimToken.sol /** * @title Contracts that should be able to recover tokens * @author SylTi * @dev This allow a contract to recover any ERC20 token received in a contract by transferring the balance to the contract owner. * This will prevent any accidental loss of tokens. */ contract CanReclaimToken is Ownable { using SafeERC20 for ERC20Basic; /** * @dev Reclaim all ERC20Basic compatible tokens * @param _token ERC20Basic The address of the token contract */ function reclaimToken(ERC20Basic _token) external onlyOwner { uint256 balance = _token.balanceOf(this); _token.safeTransfer(owner, balance); } } // File: contracts/utils/OwnableContract.sol // empty block is used as this contract just inherits others. contract OwnableContract is CanReclaimToken, Claimable { } /* solhint-disable-line no-empty-blocks */ // File: contracts/token/WBTC.sol contract WBTC is StandardToken, DetailedERC20("Wrapped BTC", "WBTC", 8), MintableToken, BurnableToken, PausableToken, OwnableContract { function burn(uint value) public onlyOwner { super.burn(value); } function finishMinting() public onlyOwner returns (bool) { return false; } function renounceOwnership() public onlyOwner { revert("renouncing ownership is blocked"); } }
Contract Security Audit
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Contract Creation Code
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Deployed Bytecode
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Swarm Source
bzzr://a1e0f5cdc96081f44eea73f352e7ef8fbfbacd306ec0f0b7275c9752d31fbe32
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