Token Dai Stablecoin

 

Overview ERC20

Price
$1.00 @ 0.000792 ETH (+0.10%)
Fully Diluted Market Cap
Total Supply:
61,411,253.196077 DAI

Holders:
62,007 addresses
Balance
0 DAI

Value
$0.00
0xf9c9941311468fa57a7a12bb123669b2c10ae49e
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OVERVIEW

Multi-Collateral Dai, brings a lot of new and exciting features, such as support for new CDP collateral types and Dai Savings Rate.

Market

Volume (24H):$107,342,370.00
Market Capitalization:$5,174,753,593.00
Circulating Supply:5,174,486,309.00 DAI
Market Data Source: Coinmarketcap


Update? Click here to update the token ICO / general information
# Exchange Pair Price  24H Volume % Volume
1
OKX
ETH-DAI$0.9996
0.0000583 Btc
$22,471,856.00
17,650.911 ETH
0.0458%
2
BitMart
BTC-DAI$0.9998
0.0000583 Btc
$8,938,763.00
521.000 BTC
0.0014%
3
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$1.004
0.0000585 Btc
$5,181,296.00
5,162,718.345 0X6B175474E89094C44DA98B954EEDEAC495271D0F
13.3886%
4
Hotbit
DAI-USDT$1.00
0.0000583 Btc
$5,160,799.00
5,160,811.180 DAI
13.3837%
5
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9981
0.0000582 Btc
$3,698,109.00
3,732,793.346 0X6B175474E89094C44DA98B954EEDEAC495271D0F
9.6804%
6
Kraken
DAI-EUR$1.00
0.0000583 Btc
$3,120,098.00
3,120,153.786 DAI
8.0916%
7
XT.COM
BTC-DAI$1.00
0.0000583 Btc
$2,423,462.00
141.139 BTC
0.0004%
8
BitMart
ETH-DAI$0.9998
0.0000583 Btc
$2,331,744.00
1,843.103 ETH
0.0048%
9
Kraken
DAI-USD$0.9997
0.0000583 Btc
$2,072,603.00
2,073,307.915 DAI
5.3768%
10
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9981
0.0000582 Btc
$1,789,914.00
1,803,818.114 0X6B175474E89094C44DA98B954EEDEAC495271D0F
4.6779%
11
BKEX
USDT-DAI$1.00
0.0000583 Btc
$1,618,948.00
1,618,714.635 USDT
4.1979%
12
Binance
USDT-DAI$0.9997
0.0000583 Btc
$1,497,549.00
1,498,115.273 USDT
3.8851%
13
LBank
DAI-USDT$0.9994
0.0000583 Btc
$1,341,525.00
1,342,348.210 DAI
3.4812%
14
OKX
BTC-DAI$1.00
0.0000583 Btc
$1,293,018.00
75.244 BTC
0.0002%
15
WhiteBIT
DAI-USDT$0.9994
0.0000582 Btc
$1,243,613.00
1,244,378.930 DAI
3.2271%
16
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XDAC17F958D2EE523A2206206994597C13D831EC7$0.9978
0.0000582 Btc
$1,147,471.00
1,150,121.604 0X6B175474E89094C44DA98B954EEDEAC495271D0F
2.9826%
17
XT.COM
ETH-DAI$1.00
0.0000583 Btc
$919,049.00
720.558 ETH
0.0019%
18
Binance
ETH-DAI$0.9997
0.0000583 Btc
$908,313.00
718.132 ETH
0.0019%
19
Kraken
DAI-USDT$0.9998
0.0000583 Btc
$876,775.00
876,942.320 DAI
2.2742%
20
BitMart
DAI-USDT$0.9998
0.0000583 Btc
$595,858.00
595,969.600 DAI
1.5455%
21
Sushiswap
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9981
0.0000582 Btc
$576,592.00
599,076.863 0X6B175474E89094C44DA98B954EEDEAC495271D0F
1.5536%
22
Uniswap (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9996
0.0000583 Btc
$567,469.00
567,778.434 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
1.4724%
23
Coinbase Exchange
DAI-USD$0.9999
0.0000583 Btc
$547,347.00
547,401.409 DAI
1.4196%
24
Kyberswap Elastic (Arbitrum)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$0.9995
0.0000583 Btc
$485,350.00
485,568.934 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
1.2592%
25
Quickswap
0XE5417AF564E4BFDA1C483642DB72007871397896-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9985
0.0000582 Btc
$462,943.00
112,837.513 0XE5417AF564E4BFDA1C483642DB72007871397896
0.2926%
26
Binance
BTC-DAI$0.9997
0.0000583 Btc
$371,199.00
21.638 BTC
0.0001%
27
Uniswap (Optimism)
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.001
0.0000583 Btc
$369,623.00
369,192.987 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.9574%
28
Azbit
DAI-USDT$0.9995
0.0000583 Btc
$332,411.00
332,582.111 DAI
0.8625%
29
Kyberswap Elastic (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$0.9996
0.0000583 Btc
$319,529.00
319,608.224 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.8289%
30
Beethoven X
0X8D11EC38A3EB5E956B052F67DA8BDC9BEF8ABF3E-USDC$0.9994
0.0000583 Btc
$313,691.00
313,879.265 0X8D11EC38A3EB5E956B052F67DA8BDC9BEF8ABF3E
0.8140%
31
Beethoven X
0X04068DA6C83AFCFA0E13BA15A6696662335D5B75-DAI$0.9996
0.0000583 Btc
$313,680.00
313,774.383 0X04068DA6C83AFCFA0E13BA15A6696662335D5B75
0.8137%
32
Uniswap (Optimism)
0X4200000000000000000000000000000000000006-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.003
0.0000584 Btc
$287,797.00
225.092 0X4200000000000000000000000000000000000006
0.0006%
33
Kyberswap Elastic (Arbitrum)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$0.9994
0.0000583 Btc
$269,337.00
269,476.426 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.6988%
34
DigiFinex
DAI-USDT$1.00
0.0000583 Btc
$249,924.00
249,802.116 DAI
0.6478%
35
KuCoin
USDT-DAI$1.001
0.0000583 Btc
$248,581.00
248,355.820 USDT
0.6441%
36
Kyberswap Elastic (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9998
0.0000583 Btc
$242,572.00
242,661.672 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.6293%
37
Bitget
DAI-USDT$0.9995
0.0000582 Btc
$218,723.00
218,838.000 DAI
0.5675%
38
Quickswap (v3)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$1.00
0.0000583 Btc
$201,849.00
201,792.293 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.5233%
39
Bybit
DAI-USDT$0.9994
0.0000582 Btc
$197,878.00
198,005.180 DAI
0.5135%
40
Bybit
BIT-DAI$0.9997
0.0000583 Btc
$197,842.00
641,482.090 BIT
1.6636%
41
Huobi
DAI-USDT$0.9993
0.0000582 Btc
$189,519.00
189,649.290 DAI
0.4918%
42
Uniswap (Arbitrum One)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$1.00
0.0000583 Btc
$154,830.00
154,812.863 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.4015%
43
Bitget
DAI-USDC$0.9998
0.0000583 Btc
$151,402.00
151,514.000 DAI
0.3929%
44
Quickswap (v3)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9998
0.0000583 Btc
$150,918.00
150,971.602 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.3915%
45
Quickswap (v3)
0XE5417AF564E4BFDA1C483642DB72007871397896-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9998
0.0000583 Btc
$134,528.00
32,762.295 0XE5417AF564E4BFDA1C483642DB72007871397896
0.0850%
46
BKEX
ETH-DAI$0.9998
0.0000583 Btc
$131,852.00
103.324 ETH
0.0003%
47
Quickswap (v3)
0XA3FA99A148FA48D14ED51D610C367C61876997F1-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9998
0.0000583 Btc
$124,786.00
125,678.848 0XA3FA99A148FA48D14ED51D610C367C61876997F1
0.3259%
48
Kyberswap Elastic (Optimism)
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9995
0.0000583 Btc
$124,389.00
124,439.866 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.3227%
49
Platypus Finance
0XA7D7079B0FEAD91F3E65F86E8915CB59C1A4C664-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$0.9994
0.0000583 Btc
$114,086.00
114,151.118 0XA7D7079B0FEAD91F3E65F86E8915CB59C1A4C664
0.2960%
50
Gemini
DAI-USD$1.00
0.0000583 Btc
$107,794.00
107,765.891 DAI
0.2795%
51
Osmosis
IBC/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7-UOSMO$0.9974
0.0000581 Btc
$101,688.00
101,951.620 IBC/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7
0.2644%
52
Uniswap (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$0.9997
0.0000583 Btc
$99,796.00
99,816.460 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.2589%
53
BitMart
DAI-USDC$0.9998
0.0000583 Btc
$98,915.00
98,930.200 DAI
0.2566%
54
ApeSwap (Polygon)
0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9999
0.0000583 Btc
$84,348.00
91,826.070 0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270
0.2381%
55
Quickswap
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9985
0.0000582 Btc
$83,889.00
84,228.262 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.2184%
56
Velodrome Finance
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9991
0.0000582 Btc
$83,461.00
83,515.485 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.2166%
57
Uniswap (Arbitrum One)
0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9965
0.0000581 Btc
$79,905.00
63.467 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1
0.0002%
58
CoinEx
DAI-USDT$1.002
0.0000584 Btc
$79,717.00
79,462.775 DAI
0.2061%
59
Uniswap (Arbitrum One)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$1.001
0.0000583 Btc
$78,872.00
78,775.607 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.2043%
60
Bithumb
DAI-KRW$1.023
0.0000596 Btc
$65,474.00
64,014.595 DAI
0.1660%
61
Uniswap (Optimism)
0X94B008AA00579C1307B0EF2C499AD98A8CE58E58-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.001
0.0000583 Btc
$64,406.00
64,329.173 0X94B008AA00579C1307B0EF2C499AD98A8CE58E58
0.1668%
62
Tokpie
DAI-USDC$1.003
0.0000583 Btc
$63,865.00
63,683.580 DAI
0.1652%
63
Uniswap (Polygon)
0XA3FA99A148FA48D14ED51D610C367C61876997F1-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9997
0.0000583 Btc
$63,794.00
64,248.592 0XA3FA99A148FA48D14ED51D610C367C61876997F1
0.1666%
64
Uniswap (v2)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XB53ECF1345CABEE6EA1A65100EBB153CEBCAC40F$0.9996
0.0000583 Btc
$60,423.00
58,337.554 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.1513%
65
ZigZag (zkSync v1)
ETH-DAI$0.9996
0.0000583 Btc
$53,437.00
41.950 ETH
0.0001%
66
EXMO
DAI-ETH$1.001
0.0000584 Btc
$41,361.00
41,312.205 DAI
0.1071%
67
ZigZag (zkSync v1)
DAI-USDC$0.97
0.0000565 Btc
$40,470.00
40,473.200 DAI
0.1050%
68
Sushiswap (Polygon POS)
0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.002
0.0000584 Btc
$35,713.00
28.208 0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619
0.0001%
69
Bitso
DAI-MXN$1.00
0.0000583 Btc
$35,632.00
35,627.036 DAI
0.0924%
70
PancakeSwap (v2)
0X1AF3F329E8BE154074D8769D1FFA4EE058B1DBC3-BUSD$0.9973
0.0000581 Btc
$33,791.00
33,827.994 0X1AF3F329E8BE154074D8769D1FFA4EE058B1DBC3
0.0877%
71
Platypus Finance
0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$0.9994
0.0000583 Btc
$32,699.00
32,713.286 0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E
0.0848%
72
Platypus Finance
0XD586E7F844CEA2F87F50152665BCBC2C279D8D70-0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E$0.9994
0.0000583 Btc
$32,696.00
32,714.696 0XD586E7F844CEA2F87F50152665BCBC2C279D8D70
0.0848%
73
Coinbase Exchange
ETH-DAI$1.00
0.0000583 Btc
$29,720.00
23.509 ETH
0.0001%
74
Bitfinex
DAI-USD$1.002
0.0000584 Btc
$23,436.00
23,386.811 DAI
0.0606%
75
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XDAC17F958D2EE523A2206206994597C13D831EC7$0.9979
0.0000582 Btc
$21,197.00
21,258.154 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.0551%
76
Gate.io
DAI-USDT$0.9974
0.0000581 Btc
$20,769.00
20,784.697 DAI
0.0539%
77
KuCoin
ETH-DAI$1.00
0.0000583 Btc
$20,258.00
16.052 ETH
0.0000%
78
Trader Joe
0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$1.007
0.0000587 Btc
$19,511.25
1,466.306 0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7
0.0038%
79
Bitvavo
DAI-EUR$0.9935
0.0000579 Btc
$18,889.45
19,013.321 DAI
0.0493%
80
Platypus Finance
0XD586E7F844CEA2F87F50152665BCBC2C279D8D70-0XC7198437980C041C805A1EDCBA50C1CE5DB95118$0.9996
0.0000583 Btc
$18,168.57
18,176.269 0XD586E7F844CEA2F87F50152665BCBC2C279D8D70
0.0471%
81
Platypus Finance
0XC7198437980C041C805A1EDCBA50C1CE5DB95118-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$0.9994
0.0000583 Btc
$18,166.62
18,176.772 0XC7198437980C041C805A1EDCBA50C1CE5DB95118
0.0471%
82
Bybit
ETH-DAI$0.9997
0.0000583 Btc
$16,109.50
12.690 ETH
0.0000%
83
KuCoin
BTC-DAI$1.00
0.0000583 Btc
$14,717.39
0.859 BTC
0.0000%
84
Platypus Finance
0X9702230A8EA53601F5CD2DC00FDBC13D4DF4A8C7-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$0.9994
0.0000583 Btc
$13,777.38
13,782.688 0X9702230A8EA53601F5CD2DC00FDBC13D4DF4A8C7
0.0357%
85
Uniswap (Optimism)
0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.001
0.0000583 Btc
$13,573.43
13,473.531 0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9
0.0349%
86
Bybit
BTC-DAI$0.9997
0.0000583 Btc
$12,198.70
0.712 BTC
0.0000%
87
ApeSwap (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9999
0.0000583 Btc
$9,763.14
9,763.974 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0253%
88
Uniswap (v3)
0X2B591E99AFE9F32EAA6214F7B7629768C40EEB39-0X6B175474E89094C44DA98B954EEDEAC495271D0F$0.9981
0.0000582 Btc
$8,945.51
313,394.766 0X2B591E99AFE9F32EAA6214F7B7629768C40EEB39
0.8127%
89
Bitstamp
DAI-USD$1.008
0.0000588 Btc
$8,735.46
8,663.212 DAI
0.0225%
90
Kyberswap Elastic (Optimism)
0X94B008AA00579C1307B0EF2C499AD98A8CE58E58-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9994
0.0000583 Btc
$8,309.16
8,311.748 0X94B008AA00579C1307B0EF2C499AD98A8CE58E58
0.0216%
91
Bancor (V2)
DAI-BNT$0.9971
0.0000581 Btc
$7,626.05
7,648.378 DAI
0.0198%
92
Hydra DEX
6D9115A21863CE31B44CD231E4C4CCC87566222F-ABC2CD00700E06922BCF30FE0AD648507113CC56$0.9942
0.0000580 Btc
$5,931.98
4,051.038 6D9115A21863CE31B44CD231E4C4CCC87566222F
0.0105%
93
Emirex
USDT-DAI$0.9998
0.0000583 Btc
$5,758.19
5,759.030 USDT
0.0149%
94
ProBit Global
DAI-USDT$0.9994
0.0000582 Btc
$4,512.32
4,515.097 DAI
0.0117%
95
Verse DEX
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$1.006
0.0000586 Btc
$4,381.89
4,416.988 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.0115%
96
Quickswap
0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9985
0.0000582 Btc
$4,082.56
3.219 0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619
0.0000%
97
Balancer (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-DAI$1.00
0.0000583 Btc
$2,696.27
2,696.452 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0070%
98
Balancer (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-USDC$1.00
0.0000583 Btc
$2,696.22
2,696.233 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.0070%
99
Sushiswap (Polygon POS)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9996
0.0000583 Btc
$1,869.24
1,874.350 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0049%
100
SpiritSwap
0X04068DA6C83AFCFA0E13BA15A6696662335D5B75-0X8D11EC38A3EB5E956B052F67DA8BDC9BEF8ABF3E$0.9973
0.0000581 Btc
$1,069.41
1,069.359 0X04068DA6C83AFCFA0E13BA15A6696662335D5B75
0.0028%

Contract Source Code Verified (Exact Match)

Contract Name:
Dai

Compiler Version
v0.6.11+commit.5ef660b1

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 1 : dai.sol
// SPDX-License-Identifier: AGPL-3.0-or-later

// Copyright (C) 2017, 2018, 2019 dbrock, rain, mrchico
// Copyright (C) 2021 Dai Foundation

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

pragma solidity ^0.6.11;

// Improved Dai token

contract Dai {

  // --- Auth ---
  mapping (address => uint256) public wards;
  function rely(address usr) external auth {
    wards[usr] = 1;
    emit Rely(usr);
  }
  function deny(address usr) external auth {
    wards[usr] = 0;
    emit Deny(usr);
  }
  modifier auth {
    require(wards[msg.sender] == 1, "Dai/not-authorized");
    _;
  }

  // --- ERC20 Data ---
  string  public constant name     = "Dai Stablecoin";
  string  public constant symbol   = "DAI";
  string  public constant version  = "2";
  uint8   public constant decimals = 18;
  uint256 public totalSupply;

  mapping (address => uint256)                      public balanceOf;
  mapping (address => mapping (address => uint256)) public allowance;
  mapping (address => uint256)                      public nonces;

  event Approval(address indexed owner, address indexed spender, uint256 value);
  event Transfer(address indexed from, address indexed to, uint256 value);
  event Rely(address indexed usr);
  event Deny(address indexed usr);

  // --- Math ---
  function _add(uint256 x, uint256 y) internal pure returns (uint256 z) {
    require((z = x + y) >= x);
  }
  function _sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
    require((z = x - y) <= x);
  }

  // --- EIP712 niceties ---
  uint256 public immutable deploymentChainId;
  bytes32 private immutable _DOMAIN_SEPARATOR;
  bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");

  constructor() public {
    wards[msg.sender] = 1;
    emit Rely(msg.sender);

    uint256 chainId;
    assembly {chainId := chainid()}
    deploymentChainId = chainId;
    _DOMAIN_SEPARATOR = _calculateDomainSeparator(chainId);
  }

  function _calculateDomainSeparator(uint256 chainId) private view returns (bytes32) {
    return keccak256(
      abi.encode(
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
        keccak256(bytes(name)),
        keccak256(bytes(version)),
        chainId,
        address(this)
      )
    );
  }
  function DOMAIN_SEPARATOR() external view returns (bytes32) {
    uint256 chainId;
    assembly {chainId := chainid()}
    return chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId);
  }

  // --- ERC20 Mutations ---
  function transfer(address to, uint256 value) external returns (bool) {
    require(to != address(0) && to != address(this), "Dai/invalid-address");
    uint256 balance = balanceOf[msg.sender];
    require(balance >= value, "Dai/insufficient-balance");

    balanceOf[msg.sender] = balance - value;
    balanceOf[to] += value;

    emit Transfer(msg.sender, to, value);

    return true;
  }
  function transferFrom(address from, address to, uint256 value) external returns (bool) {
    require(to != address(0) && to != address(this), "Dai/invalid-address");
    uint256 balance = balanceOf[from];
    require(balance >= value, "Dai/insufficient-balance");

    if (from != msg.sender) {
      uint256 allowed = allowance[from][msg.sender];
      if (allowed != type(uint256).max) {
        require(allowed >= value, "Dai/insufficient-allowance");

        allowance[from][msg.sender] = allowed - value;
      }
    }

    balanceOf[from] = balance - value;
    balanceOf[to] += value;

    emit Transfer(from, to, value);

    return true;
  }
  function approve(address spender, uint256 value) external returns (bool) {
    allowance[msg.sender][spender] = value;

    emit Approval(msg.sender, spender, value);

    return true;
  }
  function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
    uint256 newValue = _add(allowance[msg.sender][spender], addedValue);
    allowance[msg.sender][spender] = newValue;

    emit Approval(msg.sender, spender, newValue);

    return true;
  }
  function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
    uint256 allowed = allowance[msg.sender][spender];
    require(allowed >= subtractedValue, "Dai/insufficient-allowance");
    allowed = allowed - subtractedValue;
    allowance[msg.sender][spender] = allowed;

    emit Approval(msg.sender, spender, allowed);

    return true;
  }

  // --- Mint/Burn ---
  function mint(address to, uint256 value) external auth {
    require(to != address(0) && to != address(this), "Dai/invalid-address");
    balanceOf[to] = balanceOf[to] + value; // note: we don't need an overflow check here b/c balanceOf[to] <= totalSupply and there is an overflow check below
    totalSupply   = _add(totalSupply, value);

    emit Transfer(address(0), to, value);
  }
  function burn(address from, uint256 value) external {
    uint256 balance = balanceOf[from];
    require(balance >= value, "Dai/insufficient-balance");

    if (from != msg.sender && wards[msg.sender] != 1) {
      uint256 allowed = allowance[from][msg.sender];
      if (allowed != type(uint256).max) {
        require(allowed >= value, "Dai/insufficient-allowance");

        allowance[from][msg.sender] = allowed - value;
      }
    }

    balanceOf[from] = balance - value; // note: we don't need overflow checks b/c require(balance >= value) and balance <= totalSupply
    totalSupply     = totalSupply - value;

    emit Transfer(from, address(0), value);
  }

  // --- Approve by signature ---
  function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external {
    require(block.timestamp <= deadline, "Dai/permit-expired");

    uint256 chainId;
    assembly {chainId := chainid()}

    bytes32 digest =
      keccak256(abi.encodePacked(
          "\x19\x01",
          chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId),
          keccak256(abi.encode(
            PERMIT_TYPEHASH,
            owner,
            spender,
            value,
            nonces[owner]++,
            deadline
          ))
      ));

    require(owner != address(0) && owner == ecrecover(digest, v, r, s), "Dai/invalid-permit");

    allowance[owner][spender] = value;
    emit Approval(owner, spender, value);
  }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"usr","type":"address"}],"name":"Deny","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"usr","type":"address"}],"name":"Rely","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"}],"name":"deny","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"deploymentChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"}],"name":"rely","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"wards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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