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Overview
Max Total Supply
2,169,242,772.334731204935106895 CRV
Holders
88,021 ( 0.019%)
Market
Price
$0.28 @ 0.000115 ETH (-2.09%)
Onchain Market Cap
$599,801,015.48
Circulating Supply Market Cap
$330,626,815.84
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | CRV-USDT | $0.2758 0.0001142 Eth | $15,396,809.00 54,859,304.900 CRV | 29.0466% |
2 | HTX | CRV-USDT | $0.2754 0.0001141 Eth | $5,288,006.00 18,799,637.383 CRV | 9.9539% |
3 | BloFin | CRV-USDT | $0.2762 0.0001144 Eth | $5,021,950.00 17,870,602.900 CRV | 9.4620% |
4 | OKX | CRV-USDT | $0.2759 0.0001143 Eth | $2,656,920.00 9,468,006.811 CRV | 5.0131% |
5 | Websea | CRV-USDT | $0.2758 0.0001142 Eth | $2,227,171.00 0.000 CRV | 0.0000% |
6 | Bybit | CRV-USDT | $0.2757 0.0001142 Eth | $1,808,538.00 6,442,338.960 CRV | 3.4111% |
7 | LBank | CRV-USDT | $0.2756 0.0001141 Eth | $1,672,941.00 6,070,155.040 CRV | 3.2140% |
8 | Trubit | CRV-USDT | $0.2757 0.0001142 Eth | $1,458,815.00 5,190,041.400 CRV | 2.7480% |
9 | XT.COM | CRV-USDT | $0.2756 0.0001141 Eth | $1,233,661.00 4,396,051.900 CRV | 2.3276% |
10 | Gate.io | CRV-USDT | $0.2757 0.0001142 Eth | $1,196,603.00 4,261,961.990 CRV | 2.2566% |
11 | Phemex | CRV-USDT | $0.2756 0.0001140 Eth | $1,175,128.00 4,263,200.480 CRV | 2.2573% |
12 | Slex | CRV-USDT | $0.2761 0.0001142 Eth | $938,548.00 3,344,455.400 CRV | 1.7708% |
13 | WhiteBIT | CRV-USDT | $0.2758 0.0001142 Eth | $912,122.00 3,307,172.863 CRV | 1.7511% |
14 | Bitunix | CRV-USDT | $0.2757 0.0001140 Eth | $848,135.00 3,075,797.700 CRV | 1.6286% |
15 | DigiFinex | CRV-USDT | $0.2758 0.0001142 Eth | $787,818.00 2,856,459.300 CRV | 1.5124% |
16 | Biconomy.com | CRV-USDT | $0.2757 0.0001141 Eth | $718,960.00 2,565,056.100 CRV | 1.3581% |
17 | CoinCatch | CRV-USDT | $0.2756 0.0001140 Eth | $683,237.00 2,433,602.893 CRV | 1.2885% |
18 | Hotcoin | CRV-USDT | $0.2759 0.0001142 Eth | $625,025.00 2,265,793.600 CRV | 1.1997% |
19 | FameEX | CRV-USDT | $0.2757 0.0001142 Eth | $609,361.00 2,171,504.280 CRV | 1.1498% |
20 | Bitvavo | CRV-EUR | $0.2759 0.0001142 Eth | $600,308.00 2,175,563.965 CRV | 1.1519% |
21 | BYDFi | CRV-USDT | $0.276 0.0001142 Eth | $554,273.00 2,007,920.000 CRV | 1.0631% |
22 | Dex-Trade | CRV-USDT | $0.2759 0.0001143 Eth | $508,607.00 1,843,441.600 CRV | 0.9761% |
23 | Bullish | CRV-USDC | $0.2757 0.0001142 Eth | $506,873.00 1,799,144.891 CRV | 0.9526% |
24 | KuCoin | CRV-USDT | $0.276 0.0001143 Eth | $490,177.00 1,775,997.566 CRV | 0.9403% |
25 | HitBTC | CRV-USDT | $0.2757 0.0001142 Eth | $426,953.00 1,518,916.800 CRV | 0.8042% |
26 | FMFW.io | CRV-USDT | $0.2757 0.0001142 Eth | $418,839.00 1,518,916.800 CRV | 0.8042% |
27 | CoinW | CRV-USDT | $0.2762 0.0001142 Eth | $388,983.00 1,408,407.440 CRV | 0.7457% |
28 | AscendEX (BitMax) | CRV-USDT | $0.2746 0.0001137 Eth | $367,060.00 1,336,693.500 CRV | 0.7077% |
29 | Niza Global | CRV-USD | $0.276 0.0001142 Eth | $291,657.00 1,040,593.243 CRV | 0.5510% |
30 | Kraken | CRV-USD | $0.276 0.0001143 Eth | $287,283.00 1,040,882.039 CRV | 0.5511% |
31 | FMCPAY | CRV-USDT | $0.2769 0.0001146 Eth | $282,446.00 1,005,236.000 CRV | 0.5322% |
32 | Bitazza | CRV-USDT | $0.2749 0.0001139 Eth | $274,787.00 978,533.300 CRV | 0.5181% |
33 | MEXC | CRV-USDT | $0.2756 0.0001140 Eth | $256,838.00 931,916.317 CRV | 0.4934% |
34 | BingX | CRV-USDT | $0.2758 0.0001142 Eth | $255,706.00 912,165.499 CRV | 0.4830% |
35 | PointPay | CRV-USDT | $0.2757 0.0001142 Eth | $249,174.00 887,729.129 CRV | 0.4700% |
36 | Curve (Optimism) | 0XC52D7F23A2E460248DB6EE192CB23DD12BDDCBF6-0X0994206DFE8DE6EC6920FF4D779B0D950605FB53 | $0.2761 0.0001143 Eth | $238,118.00 242,488.127 0XC52D7F23A2E460248DB6EE192CB23DD12BDDCBF6 | 0.1284% |
37 | BitMart | CRV-USDT | $0.2758 0.0001142 Eth | $193,597.00 701,946.260 CRV | 0.3717% |
38 | Tokenize | CRV-SGD | $0.275 0.0001139 Eth | $190,679.00 693,354.422 CRV | 0.3671% |
39 | Tokenize | CRV-USD | $0.275 0.0001139 Eth | $190,676.00 693,368.916 CRV | 0.3671% |
40 | Coinstore | CRV-USDT | $0.2749 0.0001139 Eth | $189,126.00 674,036.300 CRV | 0.3569% |
41 | Binance | CRV-TRY | $0.2772 0.0001148 Eth | $173,045.00 613,688.700 CRV | 0.3249% |
42 | Bitkub | CRV-THB | $0.2764 0.0001145 Eth | $172,699.00 624,761.744 CRV | 0.3308% |
43 | TokoCrypto | CRV-USDT | $0.2765 0.0001144 Eth | $168,966.00 611,152.056 CRV | 0.3236% |
44 | Tapbit | CRV-USDT | $0.2756 0.0001140 Eth | $157,846.00 562,441.500 CRV | 0.2978% |
45 | Uniswap V3 (Ethereum) | 0XD533A949740BB3306D119CC777FA900BA034CD52-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $0.2763 0.0001143 Eth | $131,786.00 470,999.623 0XD533A949740BB3306D119CC777FA900BA034CD52 | 0.2494% |
46 | Nominex | CRV-USDT | $0.2755 0.0001140 Eth | $130,517.00 473,815.476 CRV | 0.2509% |
47 | Binance | CRV-USDC | $0.2767 0.0001145 Eth | $130,263.00 464,235.600 CRV | 0.2458% |
48 | P2B | CRV-USDT | $0.275 0.0001138 Eth | $125,744.00 457,297.900 CRV | 0.2421% |
49 | Binance | CRV-BTC | $0.2761 0.0001143 Eth | $119,932.00 429,026.500 CRV | 0.2272% |
50 | P2B | CRV-USD | $0.275 0.0001138 Eth | $119,183.00 433,393.670 CRV | 0.2295% |
51 | Bitget | CRV-USDT | $0.2757 0.0001142 Eth | $118,951.00 424,835.119 CRV | 0.2249% |
52 | BitDelta | CRV-USDT | $0.2758 0.0001141 Eth | $111,484.00 396,975.900 CRV | 0.2102% |
53 | Byte Exchange | CRV-USDT | $0.2756 0.0001141 Eth | $99,881.00 362,474.719 CRV | 0.1919% |
54 | Toobit | CRV-USDT | $0.2757 0.0001142 Eth | $97,371.00 347,069.000 CRV | 0.1838% |
55 | BTSE | CRV-USDT | $0.276 0.0001143 Eth | $87,930.00 318,622.069 CRV | 0.1687% |
56 | Fairdesk | CRV-USDT | $0.2759 0.0001143 Eth | $83,715.00 303,420.000 CRV | 0.1607% |
57 | WhiteBIT | CRV-BTC | $0.2759 0.0001143 Eth | $73,871.00 267,768.800 CRV | 0.1418% |
58 | Currency.com | CRV-USD | $0.2762 0.0001142 Eth | $73,613.00 266,568.000 CRV | 0.1411% |
59 | Paribu | CRV-TRY | $0.2786 0.0001153 Eth | $67,558.00 242,466.580 CRV | 0.1284% |
60 | Icrypex | CRV-TRY | $0.2779 0.0001150 Eth | $55,415.00 199,393.819 CRV | 0.1056% |
61 | WhiteBIT | CRV-TRY | $0.2772 0.0001147 Eth | $48,288.00 174,231.000 CRV | 0.0923% |
62 | Bitget | CRV-BTC | $0.2761 0.0001143 Eth | $48,127.00 172,041.177 CRV | 0.0911% |
63 | Deepcoin | CRV-USDT | $0.275 0.0001139 Eth | $45,839.00 166,921.079 CRV | 0.0884% |
64 | BigONE | CRV-USDT | $0.276 0.0001143 Eth | $44,855.00 162,508.079 CRV | 0.0860% |
65 | CoinEx | CRV-USDT | $0.276 0.0001142 Eth | $40,521.00 144,660.609 CRV | 0.0766% |
66 | WEEX | CRV-USDT | $0.2757 0.0001141 Eth | $32,718.00 116,516.000 CRV | 0.0617% |
67 | OKX | CRV-USDC | $0.2763 0.0001144 Eth | $27,662.00 98,336.616 CRV | 0.0521% |
68 | Pionex | CRV-USDT | $0.276 0.0001143 Eth | $27,120.00 96,773.862 CRV | 0.0512% |
69 | Nonkyc.io | CRV-USDT | $0.2748 0.0001138 Eth | $26,263.00 93,685.533 CRV | 0.0496% |
70 | LATOKEN | CRV-USDT | $0.2764 0.0001144 Eth | $22,662.00 82,004.531 CRV | 0.0434% |
71 | LATOKEN | CRV-BTC | $0.2767 0.0001146 Eth | $15,057.74 54,414.610 CRV | 0.0288% |
72 | Azbit | CRV-USDT | $0.2759 0.0001143 Eth | $14,113.62 50,273.855 CRV | 0.0266% |
73 | Luno | CRV-MYR | $0.2795 0.0001157 Eth | $14,009.23 50,129.510 CRV | 0.0265% |
74 | Uniswap V3 (Optimism) | 0X0994206DFE8DE6EC6920FF4D779B0D950605FB53-0X4200000000000000000000000000000000000006 | $0.2764 0.0001143 Eth | $13,268.28 47,363.649 0X0994206DFE8DE6EC6920FF4D779B0D950605FB53 | 0.0251% |
75 | XT.COM | CRV-BTC | $0.2761 0.0001143 Eth | $11,979.52 44,805.400 CRV | 0.0237% |
76 | Bitlo | CRV-TRY | $0.2772 0.0001148 Eth | $8,615.38 30,469.500 CRV | 0.0161% |
77 | WOO X | CRV-USDT | $0.2758 0.0001142 Eth | $7,990.31 28,967.979 CRV | 0.0153% |
78 | Uniswap V3 (Ethereum) | 0XD533A949740BB3306D119CC777FA900BA034CD52-0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | $0.2777 0.0001150 Eth | $7,022.89 25,008.570 0XD533A949740BB3306D119CC777FA900BA034CD52 | 0.0132% |
79 | Gemini | CRV-USD | $0.2774 0.0001149 Eth | $6,708.14 24,182.187 CRV | 0.0128% |
80 | Bitso | CRV-USD | $0.2766 0.0001146 Eth | $5,172.77 18,698.546 CRV | 0.0099% |
81 | P2B | CRV-BTC | $0.275 0.0001138 Eth | $4,814.73 17,508.300 CRV | 0.0093% |
82 | Bitstamp | CRV-EUR | $0.2766 0.0001145 Eth | $4,048.37 14,638.108 CRV | 0.0078% |
83 | Dex-Trade | CRV-BTC | $0.2755 0.0001141 Eth | $3,988.06 14,478.000 CRV | 0.0077% |
84 | Sushiswap | 0XD533A949740BB3306D119CC777FA900BA034CD52-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2781 0.0001150 Eth | $2,648.98 9,469.595 0XD533A949740BB3306D119CC777FA900BA034CD52 | 0.0050% |
85 | HashKey Global | CRV-USDT | $0.276 0.0001143 Eth | $2,469.68 8,799.800 CRV | 0.0047% |
86 | Uniswap V2 (Ethereum) | 0XD533A949740BB3306D119CC777FA900BA034CD52-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2781 0.0001151 Eth | $1,757.89 6,279.954 0XD533A949740BB3306D119CC777FA900BA034CD52 | 0.0033% |
87 | Uniswap V3 (Ethereum) | 0X4E3FBD56CD56C3E72C1403E103B45DB9DA5B9D2B-0XD533A949740BB3306D119CC777FA900BA034CD52 | $0.2782 0.0001151 Eth | $1,468.93 694.864 0X4E3FBD56CD56C3E72C1403E103B45DB9DA5B9D2B | 0.0004% |
88 | Sushiswap (Polygon POS) | 0X172370D5CD63279EFA6D502DAB29171933A610AF-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $0.2777 0.0001148 Eth | $1,153.61 4,106.953 0X172370D5CD63279EFA6D502DAB29171933A610AF | 0.0022% |
89 | Uniswap V3 (Polygon) | 0X172370D5CD63279EFA6D502DAB29171933A610AF-0XC2132D05D31C914A87C6611C10748AEB04B58E8F | $0.277 0.0001147 Eth | $734.52 2,640.650 0X172370D5CD63279EFA6D502DAB29171933A610AF | 0.0014% |
90 | ApeSwap (Polygon) | 0X172370D5CD63279EFA6D502DAB29171933A610AF-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $0.2645 0.0001094 Eth | $573.21 2,183.694 0X172370D5CD63279EFA6D502DAB29171933A610AF | 0.0012% |
91 | Bitstamp | CRV-USD | $0.2763 0.0001144 Eth | $287.53 1,040.804 CRV | 0.0006% |
92 | Balancer V2 (Polygon) | 0X172370D5CD63279EFA6D502DAB29171933A610AF-0XDF7837DE1F2FA4631D716CF2502F8B230F1DCC32 | $0.2786 0.0001152 Eth | $279.24 920.328 0X172370D5CD63279EFA6D502DAB29171933A610AF | 0.0005% |
93 | DeFi Swap | 0XD533A949740BB3306D119CC777FA900BA034CD52-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2786 0.0001152 Eth | $185.49 659.122 0XD533A949740BB3306D119CC777FA900BA034CD52 | 0.0003% |
94 | Uniswap V3 (Polygon) | 0X172370D5CD63279EFA6D502DAB29171933A610AF-0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359 | $0.2778 0.0001150 Eth | $162.56 578.597 0X172370D5CD63279EFA6D502DAB29171933A610AF | 0.0003% |
95 | Uniswap V3 (Arbitrum One) | 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $0.2768 0.0001146 Eth | $125.69 449.933 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978 | 0.0002% |
96 | CEX.IO | CRV-USDT | $0.2759 0.0001142 Eth | $102.88 368.032 CRV | 0.0002% |
97 | Sushiswap (Arbitrum One) | 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $0.2776 0.0001149 Eth | $58.68 209.058 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978 | 0.0001% |
98 | Uniswap V3 (Arbitrum One) | 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978-0XAF88D065E77C8CC2239327C5EDB3A432268E5831 | $0.2779 0.0001150 Eth | $47.34 168.330 0X11CDB42B0EB46D95F990BEDD4695A6E3FA034978 | 0.0001% |
99 | CEX.IO | CRV-EUR | $0.2771 0.0001148 Eth | $45.42 162.385 CRV | 0.0001% |
100 | CEX.IO | CRV-USD | $0.276 0.0001143 Eth | $33.93 121.344 CRV | 0.0001% |
Contract Source Code Verified (Exact Match)
Contract Name:
Vyper_contract
Compiler Version
vyper:0.2.4
Contract Source Code (Vyper language format)
# @version 0.2.4 """ @title Curve DAO Token @author Curve Finance @license MIT @notice ERC20 with piecewise-linear mining supply. @dev Based on the ERC-20 token standard as defined at https://eips.ethereum.org/EIPS/eip-20 """ from vyper.interfaces import ERC20 implements: ERC20 event Transfer: _from: indexed(address) _to: indexed(address) _value: uint256 event Approval: _owner: indexed(address) _spender: indexed(address) _value: uint256 event UpdateMiningParameters: time: uint256 rate: uint256 supply: uint256 event SetMinter: minter: address event SetAdmin: admin: address name: public(String[64]) symbol: public(String[32]) decimals: public(uint256) balanceOf: public(HashMap[address, uint256]) allowances: HashMap[address, HashMap[address, uint256]] total_supply: uint256 minter: public(address) admin: public(address) # General constants YEAR: constant(uint256) = 86400 * 365 # Allocation: # ========= # * shareholders - 30% # * emplyees - 3% # * DAO-controlled reserve - 5% # * Early users - 5% # == 43% == # left for inflation: 57% # Supply parameters INITIAL_SUPPLY: constant(uint256) = 1_303_030_303 INITIAL_RATE: constant(uint256) = 274_815_283 * 10 ** 18 / YEAR # leading to 43% premine RATE_REDUCTION_TIME: constant(uint256) = YEAR RATE_REDUCTION_COEFFICIENT: constant(uint256) = 1189207115002721024 # 2 ** (1/4) * 1e18 RATE_DENOMINATOR: constant(uint256) = 10 ** 18 INFLATION_DELAY: constant(uint256) = 86400 # Supply variables mining_epoch: public(int128) start_epoch_time: public(uint256) rate: public(uint256) start_epoch_supply: uint256 @external def __init__(_name: String[64], _symbol: String[32], _decimals: uint256): """ @notice Contract constructor @param _name Token full name @param _symbol Token symbol @param _decimals Number of decimals for token """ init_supply: uint256 = INITIAL_SUPPLY * 10 ** _decimals self.name = _name self.symbol = _symbol self.decimals = _decimals self.balanceOf[msg.sender] = init_supply self.total_supply = init_supply self.admin = msg.sender log Transfer(ZERO_ADDRESS, msg.sender, init_supply) self.start_epoch_time = block.timestamp + INFLATION_DELAY - RATE_REDUCTION_TIME self.mining_epoch = -1 self.rate = 0 self.start_epoch_supply = init_supply @internal def _update_mining_parameters(): """ @dev Update mining rate and supply at the start of the epoch Any modifying mining call must also call this """ _rate: uint256 = self.rate _start_epoch_supply: uint256 = self.start_epoch_supply self.start_epoch_time += RATE_REDUCTION_TIME self.mining_epoch += 1 if _rate == 0: _rate = INITIAL_RATE else: _start_epoch_supply += _rate * RATE_REDUCTION_TIME self.start_epoch_supply = _start_epoch_supply _rate = _rate * RATE_DENOMINATOR / RATE_REDUCTION_COEFFICIENT self.rate = _rate log UpdateMiningParameters(block.timestamp, _rate, _start_epoch_supply) @external def update_mining_parameters(): """ @notice Update mining rate and supply at the start of the epoch @dev Callable by any address, but only once per epoch Total supply becomes slightly larger if this function is called late """ assert block.timestamp >= self.start_epoch_time + RATE_REDUCTION_TIME # dev: too soon! self._update_mining_parameters() @external def start_epoch_time_write() -> uint256: """ @notice Get timestamp of the current mining epoch start while simultaneously updating mining parameters @return Timestamp of the epoch """ _start_epoch_time: uint256 = self.start_epoch_time if block.timestamp >= _start_epoch_time + RATE_REDUCTION_TIME: self._update_mining_parameters() return self.start_epoch_time else: return _start_epoch_time @external def future_epoch_time_write() -> uint256: """ @notice Get timestamp of the next mining epoch start while simultaneously updating mining parameters @return Timestamp of the next epoch """ _start_epoch_time: uint256 = self.start_epoch_time if block.timestamp >= _start_epoch_time + RATE_REDUCTION_TIME: self._update_mining_parameters() return self.start_epoch_time + RATE_REDUCTION_TIME else: return _start_epoch_time + RATE_REDUCTION_TIME @internal @view def _available_supply() -> uint256: return self.start_epoch_supply + (block.timestamp - self.start_epoch_time) * self.rate @external @view def available_supply() -> uint256: """ @notice Current number of tokens in existence (claimed or unclaimed) """ return self._available_supply() @external @view def mintable_in_timeframe(start: uint256, end: uint256) -> uint256: """ @notice How much supply is mintable from start timestamp till end timestamp @param start Start of the time interval (timestamp) @param end End of the time interval (timestamp) @return Tokens mintable from `start` till `end` """ assert start <= end # dev: start > end to_mint: uint256 = 0 current_epoch_time: uint256 = self.start_epoch_time current_rate: uint256 = self.rate # Special case if end is in future (not yet minted) epoch if end > current_epoch_time + RATE_REDUCTION_TIME: current_epoch_time += RATE_REDUCTION_TIME current_rate = current_rate * RATE_DENOMINATOR / RATE_REDUCTION_COEFFICIENT assert end <= current_epoch_time + RATE_REDUCTION_TIME # dev: too far in future for i in range(999): # Curve will not work in 1000 years. Darn! if end >= current_epoch_time: current_end: uint256 = end if current_end > current_epoch_time + RATE_REDUCTION_TIME: current_end = current_epoch_time + RATE_REDUCTION_TIME current_start: uint256 = start if current_start >= current_epoch_time + RATE_REDUCTION_TIME: break # We should never get here but what if... elif current_start < current_epoch_time: current_start = current_epoch_time to_mint += current_rate * (current_end - current_start) if start >= current_epoch_time: break current_epoch_time -= RATE_REDUCTION_TIME current_rate = current_rate * RATE_REDUCTION_COEFFICIENT / RATE_DENOMINATOR # double-division with rounding made rate a bit less => good assert current_rate <= INITIAL_RATE # This should never happen return to_mint @external def set_minter(_minter: address): """ @notice Set the minter address @dev Only callable once, when minter has not yet been set @param _minter Address of the minter """ assert msg.sender == self.admin # dev: admin only assert self.minter == ZERO_ADDRESS # dev: can set the minter only once, at creation self.minter = _minter log SetMinter(_minter) @external def set_admin(_admin: address): """ @notice Set the new admin. @dev After all is set up, admin only can change the token name @param _admin New admin address """ assert msg.sender == self.admin # dev: admin only self.admin = _admin log SetAdmin(_admin) @external @view def totalSupply() -> uint256: """ @notice Total number of tokens in existence. """ return self.total_supply @external @view def allowance(_owner : address, _spender : address) -> uint256: """ @notice Check the amount of tokens that an owner allowed to a spender @param _owner The address which owns the funds @param _spender The address which will spend the funds @return uint256 specifying the amount of tokens still available for the spender """ return self.allowances[_owner][_spender] @external def transfer(_to : address, _value : uint256) -> bool: """ @notice Transfer `_value` tokens from `msg.sender` to `_to` @dev Vyper does not allow underflows, so the subtraction in this function will revert on an insufficient balance @param _to The address to transfer to @param _value The amount to be transferred @return bool success """ assert _to != ZERO_ADDRESS # dev: transfers to 0x0 are not allowed self.balanceOf[msg.sender] -= _value self.balanceOf[_to] += _value log Transfer(msg.sender, _to, _value) return True @external def transferFrom(_from : address, _to : address, _value : uint256) -> bool: """ @notice Transfer `_value` tokens from `_from` to `_to` @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 @return bool success """ assert _to != ZERO_ADDRESS # dev: transfers to 0x0 are not allowed # NOTE: vyper does not allow underflows # so the following subtraction would revert on insufficient balance self.balanceOf[_from] -= _value self.balanceOf[_to] += _value self.allowances[_from][msg.sender] -= _value log Transfer(_from, _to, _value) return True @external def approve(_spender : address, _value : uint256) -> bool: """ @notice Approve `_spender` to transfer `_value` tokens on behalf of `msg.sender` @dev Approval may only be from zero -> nonzero or from nonzero -> zero in order to mitigate the potential race condition described here: 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 @return bool success """ assert _value == 0 or self.allowances[msg.sender][_spender] == 0 self.allowances[msg.sender][_spender] = _value log Approval(msg.sender, _spender, _value) return True @external def mint(_to: address, _value: uint256) -> bool: """ @notice Mint `_value` tokens and assign them to `_to` @dev Emits a Transfer event originating from 0x00 @param _to The account that will receive the created tokens @param _value The amount that will be created @return bool success """ assert msg.sender == self.minter # dev: minter only assert _to != ZERO_ADDRESS # dev: zero address if block.timestamp >= self.start_epoch_time + RATE_REDUCTION_TIME: self._update_mining_parameters() _total_supply: uint256 = self.total_supply + _value assert _total_supply <= self._available_supply() # dev: exceeds allowable mint amount self.total_supply = _total_supply self.balanceOf[_to] += _value log Transfer(ZERO_ADDRESS, _to, _value) return True @external def burn(_value: uint256) -> bool: """ @notice Burn `_value` tokens belonging to `msg.sender` @dev Emits a Transfer event with a destination of 0x00 @param _value The amount that will be burned @return bool success """ self.balanceOf[msg.sender] -= _value self.total_supply -= _value log Transfer(msg.sender, ZERO_ADDRESS, _value) return True @external def set_name(_name: String[64], _symbol: String[32]): """ @notice Change the token name and symbol to `_name` and `_symbol` @dev Only callable by the admin account @param _name New token name @param _symbol New token symbol """ assert msg.sender == self.admin, "Only admin is allowed to change name" self.name = _name self.symbol = _symbol
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"name":"Transfer","inputs":[{"type":"address","name":"_from","indexed":true},{"type":"address","name":"_to","indexed":true},{"type":"uint256","name":"_value","indexed":false}],"anonymous":false,"type":"event"},{"name":"Approval","inputs":[{"type":"address","name":"_owner","indexed":true},{"type":"address","name":"_spender","indexed":true},{"type":"uint256","name":"_value","indexed":false}],"anonymous":false,"type":"event"},{"name":"UpdateMiningParameters","inputs":[{"type":"uint256","name":"time","indexed":false},{"type":"uint256","name":"rate","indexed":false},{"type":"uint256","name":"supply","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetMinter","inputs":[{"type":"address","name":"minter","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetAdmin","inputs":[{"type":"address","name":"admin","indexed":false}],"anonymous":false,"type":"event"},{"outputs":[],"inputs":[{"type":"string","name":"_name"},{"type":"string","name":"_symbol"},{"type":"uint256","name":"_decimals"}],"stateMutability":"nonpayable","type":"constructor"},{"name":"update_mining_parameters","outputs":[],"inputs":[],"stateMutability":"nonpayable","type":"function","gas":148748},{"name":"start_epoch_time_write","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"nonpayable","type":"function","gas":149603},{"name":"future_epoch_time_write","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"nonpayable","type":"function","gas":149806},{"name":"available_supply","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":4018},{"name":"mintable_in_timeframe","outputs":[{"type":"uint256","name":""}],"inputs":[{"type":"uint256","name":"start"},{"type":"uint256","name":"end"}],"stateMutability":"view","type":"function","gas":2216141},{"name":"set_minter","outputs":[],"inputs":[{"type":"address","name":"_minter"}],"stateMutability":"nonpayable","type":"function","gas":38698},{"name":"set_admin","outputs":[],"inputs":[{"type":"address","name":"_admin"}],"stateMutability":"nonpayable","type":"function","gas":37837},{"name":"totalSupply","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1421},{"name":"allowance","outputs":[{"type":"uint256","name":""}],"inputs":[{"type":"address","name":"_owner"},{"type":"address","name":"_spender"}],"stateMutability":"view","type":"function","gas":1759},{"name":"transfer","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":75139},{"name":"transferFrom","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_from"},{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":111433},{"name":"approve","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_spender"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":39288},{"name":"mint","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":228030},{"name":"burn","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":74999},{"name":"set_name","outputs":[],"inputs":[{"type":"string","name":"_name"},{"type":"string","name":"_symbol"}],"stateMutability":"nonpayable","type":"function","gas":178270},{"name":"name","outputs":[{"type":"string","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":8063},{"name":"symbol","outputs":[{"type":"string","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":7116},{"name":"decimals","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1721},{"name":"balanceOf","outputs":[{"type":"uint256","name":""}],"inputs":[{"type":"address","name":"arg0"}],"stateMutability":"view","type":"function","gas":1905},{"name":"minter","outputs":[{"type":"address","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1781},{"name":"admin","outputs":[{"type":"address","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1811},{"name":"mining_epoch","outputs":[{"type":"int128","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1841},{"name":"start_epoch_time","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1871},{"name":"rate","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1901}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000f43757276652044414f20546f6b656e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034352560000000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _name (string): Curve DAO Token
Arg [1] : _symbol (string): CRV
Arg [2] : _decimals (uint256): 18
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 000000000000000000000000000000000000000000000000000000000000000f
Arg [4] : 43757276652044414f20546f6b656e0000000000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [6] : 4352560000000000000000000000000000000000000000000000000000000000
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