Token Dai Stablecoin

 

Overview ERC20

Price
$1.00 @ 0.000792 ETH (-0.04%)
Fully Diluted Market Cap
Total Supply:
61,488,256.502544 DAI

Holders:
62,039 addresses
Balance
0 DAI

Value
$0.00
0x3d6ba331e3d9702c5e8a8d254e5d8a285f223aba
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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):$118,437,329.00
Market Capitalization:$5,183,941,798.00
Circulating Supply:5,181,375,627.00 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$0.9999
0.0000583 Btc
$22,549,463.00
17,750.647 ETH
0.0503%
2
BitMart
BTC-DAI$0.9999
0.0000583 Btc
$8,074,798.00
471.049 BTC
0.0013%
3
Hotbit
DAI-USDT$1.00
0.0000584 Btc
$4,857,233.00
4,855,482.750 DAI
13.7506%
4
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9954
0.0000581 Btc
$3,507,939.00
3,560,532.637 0X6B175474E89094C44DA98B954EEDEAC495271D0F
10.0833%
5
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$1.001
0.0000584 Btc
$3,318,930.00
3,313,995.188 0X6B175474E89094C44DA98B954EEDEAC495271D0F
9.3851%
6
Kraken
DAI-EUR$0.9998
0.0000583 Btc
$2,809,841.00
2,810,439.754 DAI
7.9591%
7
XT.COM
BTC-DAI$0.9999
0.0000583 Btc
$2,554,961.00
148.894 BTC
0.0004%
8
BitMart
ETH-DAI$0.9999
0.0000583 Btc
$2,131,729.00
1,688.763 ETH
0.0048%
9
Kraken
DAI-USD$0.9997
0.0000583 Btc
$2,117,418.00
2,118,116.683 DAI
5.9985%
10
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9954
0.0000581 Btc
$1,738,980.00
1,757,030.485 0X6B175474E89094C44DA98B954EEDEAC495271D0F
4.9759%
11
BKEX
USDT-DAI$0.9999
0.0000583 Btc
$1,733,773.00
1,733,682.812 USDT
4.9097%
12
Binance
USDT-DAI$0.9999
0.0000583 Btc
$1,587,816.00
1,587,792.244 USDT
4.4966%
13
LBank
DAI-USDT$1.00
0.0000584 Btc
$1,406,559.00
1,406,261.820 DAI
3.9825%
14
WhiteBIT
DAI-USDT$0.9996
0.0000583 Btc
$1,269,258.00
1,269,751.880 DAI
3.5959%
15
OKX
BTC-DAI$0.9999
0.0000583 Btc
$1,248,165.00
72.695 BTC
0.0002%
16
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XDAC17F958D2EE523A2206206994597C13D831EC7$1.001
0.0000584 Btc
$1,181,066.00
1,179,296.873 0X6B175474E89094C44DA98B954EEDEAC495271D0F
3.3397%
17
Binance
ETH-DAI$1.00
0.0000583 Btc
$832,718.00
660.108 ETH
0.0019%
18
XT.COM
ETH-DAI$0.9999
0.0000583 Btc
$703,649.00
553.244 ETH
0.0016%
19
Quickswap
0XE5417AF564E4BFDA1C483642DB72007871397896-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.003
0.0000586 Btc
$694,498.00
172,128.392 0XE5417AF564E4BFDA1C483642DB72007871397896
0.4875%
20
BitMart
DAI-USDT$1.00
0.0000584 Btc
$591,316.00
591,220.980 DAI
1.6743%
21
Sushiswap
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9995
0.0000583 Btc
$575,615.00
599,599.788 0X6B175474E89094C44DA98B954EEDEAC495271D0F
1.6981%
22
Kraken
DAI-USDT$1.00
0.0000584 Btc
$565,390.00
565,384.130 DAI
1.6012%
23
Coinbase Exchange
DAI-USD$0.9998
0.0000583 Btc
$508,377.00
508,479.099 DAI
1.4400%
24
Kyberswap Elastic (Arbitrum)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$0.9998
0.0000583 Btc
$443,606.00
443,717.941 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
1.2566%
25
Uniswap (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9999
0.0000583 Btc
$397,871.00
397,950.029 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
1.1270%
26
Beethoven X
0X04068DA6C83AFCFA0E13BA15A6696662335D5B75-DAI$0.9999
0.0000583 Btc
$352,225.00
352,180.600 0X04068DA6C83AFCFA0E13BA15A6696662335D5B75
0.9974%
27
Beethoven X
0X8D11EC38A3EB5E956B052F67DA8BDC9BEF8ABF3E-USDC$0.9997
0.0000583 Btc
$352,176.00
352,283.096 0X8D11EC38A3EB5E956B052F67DA8BDC9BEF8ABF3E
0.9977%
28
Uniswap (Optimism)
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.00
0.0000584 Btc
$346,999.00
346,860.820 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.9823%
29
Azbit
DAI-USDT$1.00
0.0000584 Btc
$327,705.00
327,602.607 DAI
0.9278%
30
Binance
BTC-DAI$1.00
0.0000583 Btc
$313,126.00
18.279 BTC
0.0001%
31
Kyberswap Elastic (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$1.00
0.0000584 Btc
$273,050.00
273,019.718 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.7732%
32
Kyberswap Elastic (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9999
0.0000583 Btc
$254,515.00
254,557.354 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.7209%
33
Uniswap (Optimism)
0X4200000000000000000000000000000000000006-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.00
0.0000584 Btc
$249,407.00
195.880 0X4200000000000000000000000000000000000006
0.0006%
34
KuCoin
USDT-DAI$1.00
0.0000583 Btc
$240,838.00
240,654.769 USDT
0.6815%
35
Bitget
DAI-USDT$1.00
0.0000584 Btc
$234,860.00
234,897.000 DAI
0.6652%
36
Kyberswap Elastic (Arbitrum)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$0.9998
0.0000583 Btc
$221,313.00
221,352.775 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.6269%
37
Kyberswap Elastic (Optimism)
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9997
0.0000583 Btc
$198,854.00
198,888.277 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.5632%
38
Bybit
DAI-USDT$0.9997
0.0000583 Btc
$198,035.00
198,093.100 DAI
0.5610%
39
Bybit
BIT-DAI$0.9999
0.0000583 Btc
$189,980.00
622,125.510 BIT
1.7618%
40
Quickswap (v3)
0XA3FA99A148FA48D14ED51D610C367C61876997F1-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.00
0.0000583 Btc
$185,721.00
187,076.031 0XA3FA99A148FA48D14ED51D610C367C61876997F1
0.5298%
41
Quickswap (v3)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.00
0.0000583 Btc
$154,054.00
154,088.055 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.4364%
42
Bitget
DAI-USDC$0.9994
0.0000583 Btc
$150,016.00
150,103.000 DAI
0.4251%
43
DigiFinex
DAI-USDT$1.001
0.0000584 Btc
$136,214.00
136,117.719 DAI
0.3855%
44
Uniswap (Arbitrum One)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$1.002
0.0000584 Btc
$134,641.00
134,464.072 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.3808%
45
Quickswap (v3)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$0.9996
0.0000583 Btc
$130,749.00
130,797.990 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.3704%
46
Uniswap (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$1.00
0.0000584 Btc
$126,022.00
126,000.540 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.3568%
47
Platypus Finance
0XA7D7079B0FEAD91F3E65F86E8915CB59C1A4C664-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$1.00
0.0000584 Btc
$116,500.00
116,501.321 0XA7D7079B0FEAD91F3E65F86E8915CB59C1A4C664
0.3299%
48
Balancer (Arbitrum)
0XF0B5CEEFC89684889E5F7E0A7775BD100FCD3709-DAI$1.00
0.0000583 Btc
$111,618.00
114,045.482 0XF0B5CEEFC89684889E5F7E0A7775BD100FCD3709
0.3230%
49
Gemini
DAI-USD$0.9997
0.0000583 Btc
$105,893.00
105,924.629 DAI
0.3000%
50
BitMart
DAI-USDC$0.9998
0.0000583 Btc
$98,457.00
98,475.600 DAI
0.2789%
51
Quickswap
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.003
0.0000586 Btc
$96,344.00
96,288.082 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.2727%
52
Osmosis
IBC/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7-UOSMO$0.9987
0.0000583 Btc
$94,715.00
94,839.516 IBC/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7
0.2686%
53
Huobi
DAI-USDT$0.9998
0.0000583 Btc
$90,501.00
90,502.890 DAI
0.2563%
54
Uniswap (Arbitrum One)
0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9975
0.0000582 Btc
$85,351.00
67.779 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1
0.0002%
55
CoinEx
DAI-USDT$1.003
0.0000585 Btc
$81,797.00
81,517.786 DAI
0.2309%
56
Velodrome Finance
0X7F5C764CBC14F9669B88837CA1490CCA17C31607-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$0.9999
0.0000583 Btc
$78,359.00
78,348.578 0X7F5C764CBC14F9669B88837CA1490CCA17C31607
0.2219%
57
ApeSwap (Polygon)
0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9981
0.0000582 Btc
$73,817.00
81,061.635 0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270
0.2296%
58
Quickswap (v3)
0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.001
0.0000584 Btc
$70,946.00
55.673 0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619
0.0002%
59
Uniswap (Polygon)
0XA3FA99A148FA48D14ED51D610C367C61876997F1-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.00
0.0000584 Btc
$68,201.00
68,672.974 0XA3FA99A148FA48D14ED51D610C367C61876997F1
0.1945%
60
Uniswap (Optimism)
0X94B008AA00579C1307B0EF2C499AD98A8CE58E58-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.00
0.0000584 Btc
$63,808.00
63,780.275 0X94B008AA00579C1307B0EF2C499AD98A8CE58E58
0.1806%
61
Tokpie
DAI-USDC$1.00
0.0000584 Btc
$61,502.00
61,483.460 DAI
0.1741%
62
Bithumb
DAI-KRW$1.021
0.0000596 Btc
$58,108.00
56,898.222 DAI
0.1611%
63
ZigZag (zkSync v1)
ETH-DAI$0.9999
0.0000583 Btc
$52,890.00
41.577 ETH
0.0001%
64
Bitfinex
DAI-USD$1.001
0.0000584 Btc
$52,756.00
52,697.584 DAI
0.1492%
65
Uniswap (Optimism)
0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$1.00
0.0000584 Btc
$44,025.00
43,765.028 0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9
0.1239%
66
Uniswap (Arbitrum One)
0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$1.001
0.0000584 Btc
$41,603.00
41,561.954 0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1
0.1177%
67
EXMO
DAI-ETH$1.001
0.0000584 Btc
$41,476.00
41,454.644 DAI
0.1174%
68
ZigZag (zkSync v1)
DAI-USDC$0.9809
0.0000572 Btc
$40,319.00
40,309.300 DAI
0.1142%
69
Platypus Finance
0XD586E7F844CEA2F87F50152665BCBC2C279D8D70-0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E$1.00
0.0000584 Btc
$39,835.00
39,834.976 0XD586E7F844CEA2F87F50152665BCBC2C279D8D70
0.1128%
70
Platypus Finance
0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$1.00
0.0000584 Btc
$39,830.00
39,833.230 0XB97EF9EF8734C71904D8002F8B6BC66DD9C48A6E
0.1128%
71
Uniswap (v2)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XB53ECF1345CABEE6EA1A65100EBB153CEBCAC40F$0.9999
0.0000583 Btc
$39,747.00
38,798.215 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.1099%
72
PancakeSwap (v2)
0X1AF3F329E8BE154074D8769D1FFA4EE058B1DBC3-BUSD$1.001
0.0000584 Btc
$32,593.00
32,640.005 0X1AF3F329E8BE154074D8769D1FFA4EE058B1DBC3
0.0924%
73
Coinbase Exchange
ETH-DAI$1.001
0.0000584 Btc
$29,107.00
23.028 ETH
0.0001%
74
Sushiswap
0X64AA3364F17A4D01C6F1751FD97C2BD3D7E7F1D5-0X6B175474E89094C44DA98B954EEDEAC495271D0F$0.9995
0.0000583 Btc
$27,352.00
3,051.394 0X64AA3364F17A4D01C6F1751FD97C2BD3D7E7F1D5
0.0086%
75
Uniswap (v3)
0X5F98805A4E8BE255A32880FDEC7F6728C6568BA0-0X6B175474E89094C44DA98B954EEDEAC495271D0F$0.9954
0.0000581 Btc
$26,164.00
25,417.388 0X5F98805A4E8BE255A32880FDEC7F6728C6568BA0
0.0720%
76
Sushiswap (Polygon POS)
0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.998
0.0000582 Btc
$24,959.00
19.782 0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619
0.0001%
77
EXMO
DAI-BTC$0.9997
0.0000583 Btc
$21,488.00
21,494.085 DAI
0.0609%
78
KuCoin
ETH-DAI$1.001
0.0000584 Btc
$19,118.62
15.117 ETH
0.0000%
79
Bitvavo
DAI-EUR$0.9772
0.0000570 Btc
$18,347.87
18,775.829 DAI
0.0532%
80
Platypus Finance
0X9702230A8EA53601F5CD2DC00FDBC13D4DF4A8C7-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$1.00
0.0000584 Btc
$16,914.07
16,911.083 0X9702230A8EA53601F5CD2DC00FDBC13D4DF4A8C7
0.0479%
81
Bybit
ETH-DAI$0.9999
0.0000583 Btc
$16,224.10
12.824 ETH
0.0000%
82
DeFi Swap
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$1.001
0.0000584 Btc
$15,747.21
15,881.640 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.0450%
83
Bybit
BTC-DAI$0.9999
0.0000583 Btc
$12,210.84
0.713 BTC
0.0000%
84
Platypus Finance
0XC7198437980C041C805A1EDCBA50C1CE5DB95118-0XD586E7F844CEA2F87F50152665BCBC2C279D8D70$1.00
0.0000584 Btc
$10,900.33
10,900.297 0XC7198437980C041C805A1EDCBA50C1CE5DB95118
0.0309%
85
Platypus Finance
0XD586E7F844CEA2F87F50152665BCBC2C279D8D70-0XC7198437980C041C805A1EDCBA50C1CE5DB95118$0.9999
0.0000583 Btc
$10,899.95
10,900.581 0XD586E7F844CEA2F87F50152665BCBC2C279D8D70
0.0309%
86
Gate.io
DAI-USDT$0.9975
0.0000582 Btc
$9,745.60
9,746.104 DAI
0.0276%
87
KuCoin
BTC-DAI$1.00
0.0000583 Btc
$9,296.37
0.542 BTC
0.0000%
88
Balancer (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-USDC$1.00
0.0000584 Btc
$8,794.23
8,794.228 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.0249%
89
Balancer (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-DAI$0.9999
0.0000583 Btc
$8,791.80
8,794.293 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0249%
90
ApeSwap (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9981
0.0000582 Btc
$7,980.68
7,990.093 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0226%
91
Bancor (V2)
DAI-BNT$0.9957
0.0000581 Btc
$7,456.75
7,488.802 DAI
0.0212%
92
Quickswap
0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$1.003
0.0000586 Btc
$6,293.55
4.948 0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619
0.0000%
93
Balancer (Polygon)
0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063-USDT$1.00
0.0000584 Btc
$5,800.80
5,798.942 0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063
0.0164%
94
Balancer (Polygon)
0XC2132D05D31C914A87C6611C10748AEB04B58E8F-DAI$0.9999
0.0000583 Btc
$5,798.83
5,799.706 0XC2132D05D31C914A87C6611C10748AEB04B58E8F
0.0164%
95
Emirex
USDT-DAI$0.9999
0.0000583 Btc
$5,797.46
5,796.220 USDT
0.0164%
96
ProBit Global
DAI-USDT$0.9997
0.0000583 Btc
$4,369.66
4,370.941 DAI
0.0124%
97
Sushiswap (Polygon POS)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$0.9991
0.0000583 Btc
$3,925.51
3,942.843 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0112%
98
Verse DEX
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9986
0.0000583 Btc
$3,342.46
3,376.742 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.0096%
99
Bitfinex
DAI-BTC$1.00
0.0000584 Btc
$2,564.67
2,564.050 DAI
0.0073%
100
Concave
0X000000007A58F5F58E697E51AB0357BC9E260A04-0X6B175474E89094C44DA98B954EEDEAC495271D0F$0.9999
0.0000583 Btc
$1,162.58
206.150 0X000000007A58F5F58E697E51AB0357BC9E260A04
0.0006%

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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