Overview
Max Total Supply
4,040,086.28605244 Cake
Holders
15,822 ( 0.044%)
Market
Price
$3.33 @ 0.000852 ETH (+2.79%)
Onchain Market Cap
$13,453,487.33
Circulating Supply Market Cap
$961,192,175.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
1.51225239 CakeValue
$5.04 ( ~0.00128955545674561 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | CAKE-USDT | $3.32 0.0008506 Eth | $20,352,597.00 6,302,644.610 CAKE | 22.7149% |
2 | WhiteBIT | CAKE-USDT | $3.32 0.0008510 Eth | $8,784,341.00 2,641,974.859 CAKE | 9.5217% |
3 | Ourbit | CAKE-USDT | $3.33 0.0008515 Eth | $5,669,968.00 1,755,093.470 CAKE | 6.3254% |
4 | Bitrue | CAKE-XRP | $3.32 0.0008501 Eth | $3,567,209.00 1,074,018.500 CAKE | 3.8708% |
5 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $3.32 0.0008505 Eth | $3,435,816.00 1,040,388.321 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 3.7496% |
6 | CoinEx | CAKE-USDT | $3.33 0.0008530 Eth | $3,190,904.00 978,659.597 CAKE | 3.5271% |
7 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $3.33 0.0008511 Eth | $3,119,009.00 956,272.965 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 3.4464% |
8 | Bybit | CAKE-USDT | $3.32 0.0008507 Eth | $2,975,512.00 923,857.990 CAKE | 3.3296% |
9 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955 | $3.34 0.0008544 Eth | $2,692,285.00 833,572.358 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 3.0042% |
10 | XT.COM | CAKE-USDT | $3.33 0.0008512 Eth | $2,629,539.00 814,312.150 CAKE | 2.9348% |
11 | Azbit | CAKE-USDT | $3.32 0.0008508 Eth | $2,601,368.00 804,898.350 CAKE | 2.9009% |
12 | Websea | CAKE-USDT | $3.33 0.0008522 Eth | $2,170,330.00 0.000 CAKE | 0.0000% |
13 | Bitrue | CAKE-USDT | $3.32 0.0008506 Eth | $1,960,044.00 589,775.530 CAKE | 2.1256% |
14 | Bitunix | CAKE-USDT | $3.32 0.0008501 Eth | $1,709,494.00 514,369.130 CAKE | 1.8538% |
15 | Gate.io | CAKE-USDT | $3.32 0.0008503 Eth | $1,537,944.00 473,530.700 CAKE | 1.7066% |
16 | Phemex | CAKE-USDT | $3.32 0.0008507 Eth | $1,417,691.00 426,565.330 CAKE | 1.5374% |
17 | Bitget | CAKE-USDT | $3.32 0.0008503 Eth | $1,363,069.00 423,632.937 CAKE | 1.5268% |
18 | LBank | CAKE-USDT | $3.32 0.0008504 Eth | $1,325,482.00 398,988.640 CAKE | 1.4380% |
19 | BTSE | CAKE-USDT | $3.32 0.0008505 Eth | $1,288,994.00 387,902.174 CAKE | 1.3980% |
20 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $3.32 0.0008505 Eth | $1,208,363.00 370,294.309 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 1.3346% |
21 | KuCoin | CAKE-USDT | $3.32 0.0008508 Eth | $1,151,194.00 346,262.484 CAKE | 1.2479% |
22 | MEXC | CAKE-USDT | $3.32 0.0008509 Eth | $1,143,911.00 344,104.730 CAKE | 1.2402% |
23 | OrangeX | CAKE-USDT | $3.32 0.0008503 Eth | $1,040,706.00 321,307.720 CAKE | 1.1580% |
24 | Coinstore | CAKE-USDT | $3.32 0.0008501 Eth | $1,026,896.00 317,918.730 CAKE | 1.1458% |
25 | Trubit | CAKE-USDT | $3.32 0.0008506 Eth | $879,517.00 270,701.530 CAKE | 0.9756% |
26 | FameEX | CAKE-USDT | $3.34 0.0008540 Eth | $867,158.00 268,582.989 CAKE | 0.9680% |
27 | Hotcoin | CAKE-USDT | $3.32 0.0008509 Eth | $850,812.00 255,948.120 CAKE | 0.9224% |
28 | BYDFi | CAKE-USDT | $3.32 0.0008504 Eth | $845,723.00 254,542.890 CAKE | 0.9174% |
29 | Uniswap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955 | $3.37 0.0008623 Eth | $668,162.00 203,951.882 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.7350% |
30 | Dex-Trade | CAKE-USDT | $3.32 0.0008506 Eth | $649,200.00 195,333.029 CAKE | 0.7040% |
31 | Fastex | CAKE-USDT | $3.32 0.0008509 Eth | $612,906.00 184,361.158 CAKE | 0.6644% |
32 | Hibt | CAKE-USDT | $3.34 0.0008543 Eth | $608,806.00 188,579.702 CAKE | 0.6796% |
33 | BVOX | CAKE-USDT | $3.33 0.0008512 Eth | $607,735.00 188,144.050 CAKE | 0.6781% |
34 | FMCPAY | CAKE-USDT | $3.34 0.0008532 Eth | $566,892.00 175,298.338 CAKE | 0.6318% |
35 | Azbit | CAKE-BTC | $3.32 0.0008488 Eth | $552,897.00 169,624.370 CAKE | 0.6113% |
36 | Biconomy.com | CAKE-USDT | $3.34 0.0008541 Eth | $414,398.00 128,288.240 CAKE | 0.4624% |
37 | LATOKEN | CAKE-USDT | $3.34 0.0008540 Eth | $389,684.00 116,840.224 CAKE | 0.4211% |
38 | Toobit | CAKE-USDT | $3.33 0.0008512 Eth | $387,846.00 120,073.290 CAKE | 0.4327% |
39 | DigiFinex | CAKE-USDT | $3.32 0.0008501 Eth | $384,970.00 115,907.000 CAKE | 0.4177% |
40 | BingX | CAKE-USDT | $3.32 0.0008506 Eth | $372,186.00 115,126.991 CAKE | 0.4149% |
41 | Binance | CAKE-TRY | $3.36 0.0008594 Eth | $348,679.00 107,507.030 CAKE | 0.3875% |
42 | PointPay | CAKE-USDT | $3.34 0.0008545 Eth | $330,426.00 102,352.913 CAKE | 0.3689% |
43 | Binance | CAKE-BTC | $3.32 0.0008509 Eth | $323,748.00 99,257.690 CAKE | 0.3577% |
44 | Koinpark | CAKE-USDT | $3.32 0.0008509 Eth | $302,447.00 90,984.497 CAKE | 0.3279% |
45 | Bitazza | CAKE-USDT | $3.31 0.0008478 Eth | $285,747.00 88,404.860 CAKE | 0.3186% |
46 | BitDelta | CAKE-USDT | $3.32 0.0008509 Eth | $280,869.00 86,830.950 CAKE | 0.3129% |
47 | LATOKEN | CAKE-BTC | $3.32 0.0008509 Eth | $248,401.00 74,727.000 CAKE | 0.2693% |
48 | Tokpie | CAKE-USDT | $3.34 0.0008535 Eth | $217,732.00 65,229.504 CAKE | 0.2351% |
49 | HTX | CAKE-USDT | $3.32 0.0008499 Eth | $197,873.00 61,296.358 CAKE | 0.2209% |
50 | Byte Exchange | CAKE-USDT | $3.35 0.0008563 Eth | $190,803.00 56,951.463 CAKE | 0.2053% |
51 | Koinpark | CAKE-INR | $3.35 0.0008579 Eth | $187,610.00 55,970.426 CAKE | 0.2017% |
52 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955 | $3.32 0.0008505 Eth | $182,275.00 56,485.159 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.2036% |
53 | BitMart | CAKE-USDT | $3.32 0.0008508 Eth | $179,002.00 53,845.260 CAKE | 0.1941% |
54 | Tapbit | CAKE-USDT | $3.34 0.0008548 Eth | $161,819.00 50,113.440 CAKE | 0.1806% |
55 | CoinW | CAKE-USDT | $3.34 0.0008536 Eth | $156,886.00 47,012.534 CAKE | 0.1694% |
56 | Pionex | CAKE-USDT | $3.33 0.0008515 Eth | $152,343.00 47,178.986 CAKE | 0.1700% |
57 | PancakeSwap V1 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $3.32 0.0008507 Eth | $147,519.00 45,237.905 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.1630% |
58 | Bitvavo | CAKE-EUR | $3.33 0.0008521 Eth | $146,482.00 43,991.641 CAKE | 0.1585% |
59 | AscendEX (BitMax) | CAKE-USDT | $3.31 0.0008473 Eth | $142,667.00 43,096.960 CAKE | 0.1553% |
60 | Bithumb | CAKE-KRW | $3.31 0.0008477 Eth | $139,542.00 42,125.357 CAKE | 0.1518% |
61 | Tokpie | CAKE-WBTC | $3.33 0.0008521 Eth | $127,562.00 38,276.745 CAKE | 0.1380% |
62 | Nonkyc.io | CAKE-BNB | $3.33 0.0008531 Eth | $118,824.00 36,499.840 CAKE | 0.1315% |
63 | Icrypex | CAKE-USDT | $3.32 0.0008497 Eth | $117,473.00 35,386.362 CAKE | 0.1275% |
64 | Binance | CAKE-BNB | $3.34 0.0008536 Eth | $98,347.00 30,195.360 CAKE | 0.1088% |
65 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $3.33 0.0008515 Eth | $94,697.00 27,685.439 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0998% |
66 | BloFin | CAKE-USDT | $3.33 0.0008524 Eth | $88,902.00 27,485.210 CAKE | 0.0991% |
67 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XE9E7CEA3DEDCA5984780BAFC599BD69ADD087D56 | $3.35 0.0008586 Eth | $76,713.00 23,701.701 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0854% |
68 | PancakeSwap (Aptos) | 0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT-0X1::APTOS_COIN::APTOSCOIN | $3.34 0.0008538 Eth | $75,436.00 22,904.047 0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT | 0.0825% |
69 | PancakeSwap V3 (Base) | 0X3055913C90FCC1A6CE9A358911721EEB942013A1-0X4200000000000000000000000000000000000006 | $3.30 0.0008441 Eth | $72,368.00 22,019.530 0X3055913C90FCC1A6CE9A358911721EEB942013A1 | 0.0794% |
70 | Tokpie | CAKE-BNB | $3.33 0.0008527 Eth | $65,230.00 19,579.306 CAKE | 0.0706% |
71 | FMCPAY | CAKE-BTC | $3.33 0.0008514 Eth | $64,777.00 19,816.800 CAKE | 0.0714% |
72 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C | $3.32 0.0008503 Eth | $64,024.00 19,554.884 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0705% |
73 | Nonkyc.io | CAKE-USDT | $3.33 0.0008525 Eth | $58,756.00 18,189.960 CAKE | 0.0656% |
74 | Tokpie | CAKE-ETH | $3.35 0.0008576 Eth | $53,530.00 15,976.885 CAKE | 0.0576% |
75 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $3.33 0.0008522 Eth | $36,397.00 11,145.768 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0402% |
76 | WEEX | CAKE-USDT | $3.33 0.0008511 Eth | $34,283.00 10,593.000 CAKE | 0.0382% |
77 | Tothemoon | CAKE-USDT | $3.34 0.0008554 Eth | $27,477.00 8,220.230 CAKE | 0.0296% |
78 | PancakeSwap (Aptos) | 0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT-0XF22BEDE237A07E121B56D91A491EB7BCDFD1F5907926A9E58338F964A01B17FA::ASSET::USDC | $3.32 0.0008501 Eth | $24,023.00 7,442.559 0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT | 0.0268% |
79 | CoinEx | CAKE-USDC | $3.33 0.0008516 Eth | $23,183.00 7,215.715 CAKE | 0.0260% |
80 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XE9E7CEA3DEDCA5984780BAFC599BD69ADD087D56 | $3.33 0.0008511 Eth | $22,681.00 7,036.464 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0254% |
81 | Bitexlive | CAKE-USDT | $3.32 0.0008508 Eth | $15,307.96 4,604.527 CAKE | 0.0166% |
82 | Dex-Trade | CAKE-BTC | $3.32 0.0008504 Eth | $10,821.31 3,257.000 CAKE | 0.0117% |
83 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XC9DE725A4BE9AB74B136C29D4731D6BEBD7122E8 | $3.33 0.0008510 Eth | $10,306.42 3,489.885 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0126% |
84 | TokoCrypto | CAKE-USDT | $3.32 0.0008501 Eth | $10,305.54 3,102.794 CAKE | 0.0112% |
85 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XC5F0F7B66764F6EC8C8DFF7BA683102295E16409 | $3.33 0.0008511 Eth | $7,312.82 2,272.271 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0082% |
86 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $3.32 0.0008498 Eth | $6,867.90 1,563.073 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0056% |
87 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X4B4594BFE661919A8E2373EB175004DA2989A479 | $3.34 0.0008550 Eth | $6,534.86 1,945.063 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0070% |
88 | PancakeSwap V3 (zkSync) | 0X3A287A06C66F9E95A56327185CA2BDF5F031CECD-0X5AEA5775959FBC2557CC8789BC1BF90A239D9A91 | $3.32 0.0008497 Eth | $5,857.96 1,784.826 0X3A287A06C66F9E95A56327185CA2BDF5F031CECD | 0.0064% |
89 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C | $3.33 0.0008535 Eth | $4,476.77 1,371.049 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0049% |
90 | SyncSwap (zkSync) | 0X3A287A06C66F9E95A56327185CA2BDF5F031CECD-0X5AEA5775959FBC2557CC8789BC1BF90A239D9A91 | $3.33 0.0008535 Eth | $3,478.65 1,059.034 0X3A287A06C66F9E95A56327185CA2BDF5F031CECD | 0.0038% |
91 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XCC42724C6683B7E57334C4E856F4C9965ED682BD | $3.35 0.0008581 Eth | $2,376.09 720.359 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0026% |
92 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XAFCC12E4040615E7AFE9FB4330EB3D9120ACAC05 | $3.33 0.0008513 Eth | $2,371.51 732.473 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0026% |
93 | PancakeSwap (v2) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D | $3.34 0.0008543 Eth | $1,942.90 681.520 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0025% |
94 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X8263CD1601FE73C066BF49CC09841F35348E3BE0 | $3.31 0.0008475 Eth | $1,256.86 393.592 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0014% |
95 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X4C882EC256823EE773B25B414D36F92EF58A7C0C | $3.33 0.0008510 Eth | $626.69 190.036 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0007% |
96 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X947950BCC74888A40FFA2593C5798F11FC9124C4 | $3.33 0.0008524 Eth | $389.71 118.968 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0004% |
97 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBF5140A22578168FD562DCCF235E5D43A02CE9B1 | $3.35 0.0008587 Eth | $296.03 89.390 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0003% |
98 | PancakeSwap V3 (BSC) | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X99945F484EBC48F5307CC00CF8DCF8D6D3D4B017 | $3.33 0.0008531 Eth | $279.34 86.059 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0003% |
99 | Nomiswap | 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955 | $3.34 0.0008536 Eth | $182.18 56.475 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82 | 0.0002% |
100 | CEX.IO | CAKE-USDT | $3.34 0.0008540 Eth | $159.39 49.770 CAKE | 0.0002% |
Contract Name:
CakeOFT
Compiler Version
v0.8.12+commit.f00d7308
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity ^0.8.0; import "@layerzerolabs/solidity-examples/contracts/token/oft/v2/fee/OFTWithFee.sol"; import "@openzeppelin/contracts/security/Pausable.sol"; contract CakeOFT is OFTWithFee, Pausable { // Outbound cap mapping(uint16 => uint256) public chainIdToOutboundCap; mapping(uint16 => uint256) public chainIdToSentTokenAmount; mapping(uint16 => uint256) public chainIdToLastSentTimestamp; // Inbound cap mapping(uint16 => uint256) public chainIdToInboundCap; mapping(uint16 => uint256) public chainIdToReceivedTokenAmount; mapping(uint16 => uint256) public chainIdToLastReceivedTimestamp; // If an address is whitelisted, the inbound/outbound cap checks are skipped mapping(address => bool) public whitelist; error ExceedOutboundCap(uint256 cap, uint256 amount); error ExceedInboundCap(uint256 cap, uint256 amount); event SetOperator(address newOperator); event SetOutboundCap(uint16 indexed chainId, uint256 cap); event SetInboundCap(uint16 indexed chainId, uint256 cap); event SetWhitelist(address indexed addr, bool isWhitelist); event FallbackWithdraw(address indexed to, uint256 amount); event DropFailedMessage(uint16 srcChainId, bytes srcAddress, uint64 nonce); constructor(address _lzEndpoint) OFTWithFee("PancakeSwap Token", "Cake", 8, _lzEndpoint){} function decimals() public pure override returns (uint8){ return 18; } function _debitFrom( address _from, uint16 _dstChainId, bytes32 _toAddress, uint256 _amount ) internal override whenNotPaused returns (uint256) { uint256 amount = super._debitFrom( _from, _dstChainId, _toAddress, _amount ); if (whitelist[_from]) { return amount; } uint256 sentTokenAmount; uint256 lastSentTimestamp = chainIdToLastSentTimestamp[_dstChainId]; uint256 currTimestamp = block.timestamp; if ((currTimestamp / (1 days)) > (lastSentTimestamp / (1 days))) { sentTokenAmount = amount; } else { sentTokenAmount = chainIdToSentTokenAmount[_dstChainId] + amount; } uint256 outboundCap = chainIdToOutboundCap[_dstChainId]; if (sentTokenAmount > outboundCap) { revert ExceedOutboundCap(outboundCap, sentTokenAmount); } chainIdToSentTokenAmount[_dstChainId] = sentTokenAmount; chainIdToLastSentTimestamp[_dstChainId] = currTimestamp; return amount; } function _creditTo( uint16 _srcChainId, address _toAddress, uint256 _amount ) internal override whenNotPaused returns (uint256) { uint256 amount = super._creditTo(_srcChainId, _toAddress, _amount); if (whitelist[_toAddress]) { return amount; } uint256 receivedTokenAmount; uint256 lastReceivedTimestamp = chainIdToLastReceivedTimestamp[ _srcChainId ]; uint256 currTimestamp = block.timestamp; if ((currTimestamp / (1 days)) > (lastReceivedTimestamp / (1 days))) { receivedTokenAmount = amount; } else { receivedTokenAmount = chainIdToReceivedTokenAmount[_srcChainId] + amount; } uint256 inboundCap = chainIdToInboundCap[_srcChainId]; if (receivedTokenAmount > inboundCap) { revert ExceedInboundCap(inboundCap, receivedTokenAmount); } chainIdToReceivedTokenAmount[_srcChainId] = receivedTokenAmount; chainIdToLastReceivedTimestamp[_srcChainId] = currTimestamp; return amount; } function setOutboundCap(uint16 chainId, uint256 cap) external onlyOwner { chainIdToOutboundCap[chainId] = cap; emit SetOutboundCap(chainId, cap); } function setInboundCap(uint16 chainId, uint256 cap) external onlyOwner { chainIdToInboundCap[chainId] = cap; emit SetInboundCap(chainId, cap); } function setWhitelist(address addr, bool isWhitelist) external onlyOwner { whitelist[addr] = isWhitelist; emit SetWhitelist(addr, isWhitelist); } function pause() external onlyOwner { _pause(); } function unpause() external onlyOwner { _unpause(); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "./ILayerZeroUserApplicationConfig.sol"; interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig { // @notice send a LayerZero message to the specified address at a LayerZero endpoint. // @param _dstChainId - the destination chain identifier // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains // @param _payload - a custom bytes payload to send to the destination contract // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable; // @notice used by the messaging library to publish verified payload // @param _srcChainId - the source chain identifier // @param _srcAddress - the source contract (as bytes) at the source chain // @param _dstAddress - the address on destination chain // @param _nonce - the unbound message ordering nonce // @param _gasLimit - the gas limit for external contract execution // @param _payload - verified payload to send to the destination contract function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external; // @notice get the inboundNonce of a lzApp from a source chain which could be EVM or non-EVM chain // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64); // @notice get the outboundNonce from this source chain which, consequently, is always an EVM // @param _srcAddress - the source chain contract address function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64); // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery // @param _dstChainId - the destination chain identifier // @param _userApplication - the user app address on this EVM chain // @param _payload - the custom message to send over LayerZero // @param _payInZRO - if false, user app pays the protocol fee in native token // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee); // @notice get this Endpoint's immutable source identifier function getChainId() external view returns (uint16); // @notice the interface to retry failed message on this Endpoint destination // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address // @param _payload - the payload to be retried function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external; // @notice query if any STORED payload (message blocking) at the endpoint. // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool); // @notice query if the _libraryAddress is valid for sending msgs. // @param _userApplication - the user app address on this EVM chain function getSendLibraryAddress(address _userApplication) external view returns (address); // @notice query if the _libraryAddress is valid for receiving msgs. // @param _userApplication - the user app address on this EVM chain function getReceiveLibraryAddress(address _userApplication) external view returns (address); // @notice query if the non-reentrancy guard for send() is on // @return true if the guard is on. false otherwise function isSendingPayload() external view returns (bool); // @notice query if the non-reentrancy guard for receive() is on // @return true if the guard is on. false otherwise function isReceivingPayload() external view returns (bool); // @notice get the configuration of the LayerZero messaging library of the specified version // @param _version - messaging library version // @param _chainId - the chainId for the pending config change // @param _userApplication - the contract address of the user application // @param _configType - type of configuration. every messaging library has its own convention. function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory); // @notice get the send() LayerZero messaging library version // @param _userApplication - the contract address of the user application function getSendVersion(address _userApplication) external view returns (uint16); // @notice get the lzReceive() LayerZero messaging library version // @param _userApplication - the contract address of the user application function getReceiveVersion(address _userApplication) external view returns (uint16); }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; interface ILayerZeroReceiver { // @notice LayerZero endpoint will invoke this function to deliver the message on the destination // @param _srcChainId - the source endpoint identifier // @param _srcAddress - the source sending contract address from the source chain // @param _nonce - the ordered message nonce // @param _payload - the signed payload is the UA bytes has encoded to be sent function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; interface ILayerZeroUserApplicationConfig { // @notice set the configuration of the LayerZero messaging library of the specified version // @param _version - messaging library version // @param _chainId - the chainId for the pending config change // @param _configType - type of configuration. every messaging library has its own convention. // @param _config - configuration in the bytes. can encode arbitrary content. function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external; // @notice set the send() LayerZero messaging library version to _version // @param _version - new messaging library version function setSendVersion(uint16 _version) external; // @notice set the lzReceive() LayerZero messaging library version to _version // @param _version - new messaging library version function setReceiveVersion(uint16 _version) external; // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload // @param _srcChainId - the chainId of the source chain // @param _srcAddress - the contract address of the source contract at the source chain function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "../interfaces/ILayerZeroReceiver.sol"; import "../interfaces/ILayerZeroUserApplicationConfig.sol"; import "../interfaces/ILayerZeroEndpoint.sol"; import "../util/BytesLib.sol"; /* * a generic LzReceiver implementation */ abstract contract LzApp is Ownable, ILayerZeroReceiver, ILayerZeroUserApplicationConfig { using BytesLib for bytes; ILayerZeroEndpoint public immutable lzEndpoint; mapping(uint16 => bytes) public trustedRemoteLookup; mapping(uint16 => mapping(uint16 => uint)) public minDstGasLookup; address public precrime; event SetPrecrime(address precrime); event SetTrustedRemote(uint16 _remoteChainId, bytes _path); event SetTrustedRemoteAddress(uint16 _remoteChainId, bytes _remoteAddress); event SetMinDstGas(uint16 _dstChainId, uint16 _type, uint _minDstGas); constructor(address _endpoint) { lzEndpoint = ILayerZeroEndpoint(_endpoint); } function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public virtual override { // lzReceive must be called by the endpoint for security require(_msgSender() == address(lzEndpoint), "LzApp: invalid endpoint caller"); bytes memory trustedRemote = trustedRemoteLookup[_srcChainId]; // if will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote. require(_srcAddress.length == trustedRemote.length && trustedRemote.length > 0 && keccak256(_srcAddress) == keccak256(trustedRemote), "LzApp: invalid source sending contract"); _blockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); } // abstract function - the default behaviour of LayerZero is blocking. See: NonblockingLzApp if you dont need to enforce ordered messaging function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual; function _lzSend(uint16 _dstChainId, bytes memory _payload, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams, uint _nativeFee) internal virtual { bytes memory trustedRemote = trustedRemoteLookup[_dstChainId]; require(trustedRemote.length != 0, "LzApp: destination chain is not a trusted source"); lzEndpoint.send{value: _nativeFee}(_dstChainId, trustedRemote, _payload, _refundAddress, _zroPaymentAddress, _adapterParams); } function _checkGasLimit(uint16 _dstChainId, uint16 _type, bytes memory _adapterParams, uint _extraGas) internal view virtual { uint providedGasLimit = _getGasLimit(_adapterParams); uint minGasLimit = minDstGasLookup[_dstChainId][_type] + _extraGas; require(minGasLimit > 0, "LzApp: minGasLimit not set"); require(providedGasLimit >= minGasLimit, "LzApp: gas limit is too low"); } function _getGasLimit(bytes memory _adapterParams) internal pure virtual returns (uint gasLimit) { require(_adapterParams.length >= 34, "LzApp: invalid adapterParams"); assembly { gasLimit := mload(add(_adapterParams, 34)) } } //---------------------------UserApplication config---------------------------------------- function getConfig(uint16 _version, uint16 _chainId, address, uint _configType) external view returns (bytes memory) { return lzEndpoint.getConfig(_version, _chainId, address(this), _configType); } // generic config for LayerZero user Application function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external override onlyOwner { lzEndpoint.setConfig(_version, _chainId, _configType, _config); } function setSendVersion(uint16 _version) external override onlyOwner { lzEndpoint.setSendVersion(_version); } function setReceiveVersion(uint16 _version) external override onlyOwner { lzEndpoint.setReceiveVersion(_version); } function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external override onlyOwner { lzEndpoint.forceResumeReceive(_srcChainId, _srcAddress); } // _path = abi.encodePacked(remoteAddress, localAddress) // this function set the trusted path for the cross-chain communication function setTrustedRemote(uint16 _srcChainId, bytes calldata _path) external onlyOwner { trustedRemoteLookup[_srcChainId] = _path; emit SetTrustedRemote(_srcChainId, _path); } function setTrustedRemoteAddress(uint16 _remoteChainId, bytes calldata _remoteAddress) external onlyOwner { trustedRemoteLookup[_remoteChainId] = abi.encodePacked(_remoteAddress, address(this)); emit SetTrustedRemoteAddress(_remoteChainId, _remoteAddress); } function getTrustedRemoteAddress(uint16 _remoteChainId) external view returns (bytes memory) { bytes memory path = trustedRemoteLookup[_remoteChainId]; require(path.length != 0, "LzApp: no trusted path record"); return path.slice(0, path.length - 20); // the last 20 bytes should be address(this) } function setPrecrime(address _precrime) external onlyOwner { precrime = _precrime; emit SetPrecrime(_precrime); } function setMinDstGas(uint16 _dstChainId, uint16 _packetType, uint _minGas) external onlyOwner { require(_minGas > 0, "LzApp: invalid minGas"); minDstGasLookup[_dstChainId][_packetType] = _minGas; emit SetMinDstGas(_dstChainId, _packetType, _minGas); } //--------------------------- VIEW FUNCTION ---------------------------------------- function isTrustedRemote(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool) { bytes memory trustedSource = trustedRemoteLookup[_srcChainId]; return keccak256(trustedSource) == keccak256(_srcAddress); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./LzApp.sol"; import "../util/ExcessivelySafeCall.sol"; /* * the default LayerZero messaging behaviour is blocking, i.e. any failed message will block the channel * this abstract class try-catch all fail messages and store locally for future retry. hence, non-blocking * NOTE: if the srcAddress is not configured properly, it will still block the message pathway from (srcChainId, srcAddress) */ abstract contract NonblockingLzApp is LzApp { using ExcessivelySafeCall for address; constructor(address _endpoint) LzApp(_endpoint) {} mapping(uint16 => mapping(bytes => mapping(uint64 => bytes32))) public failedMessages; event MessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload, bytes _reason); event RetryMessageSuccess(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes32 _payloadHash); // overriding the virtual function in LzReceiver function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual override { (bool success, bytes memory reason) = address(this).excessivelySafeCall(gasleft(), 150, abi.encodeWithSelector(this.nonblockingLzReceive.selector, _srcChainId, _srcAddress, _nonce, _payload)); // try-catch all errors/exceptions if (!success) { _storeFailedMessage(_srcChainId, _srcAddress, _nonce, _payload, reason); } } function _storeFailedMessage(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload, bytes memory _reason) internal virtual { failedMessages[_srcChainId][_srcAddress][_nonce] = keccak256(_payload); emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload, _reason); } function nonblockingLzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public virtual { // only internal transaction require(_msgSender() == address(this), "NonblockingLzApp: caller must be LzApp"); _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); } //@notice override this function function _nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual; function retryMessage(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public payable virtual { // assert there is message to retry bytes32 payloadHash = failedMessages[_srcChainId][_srcAddress][_nonce]; require(payloadHash != bytes32(0), "NonblockingLzApp: no stored message"); require(keccak256(_payload) == payloadHash, "NonblockingLzApp: invalid payload"); // clear the stored message failedMessages[_srcChainId][_srcAddress][_nonce] = bytes32(0); // execute the message. revert if it fails again _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); emit RetryMessageSuccess(_srcChainId, _srcAddress, _nonce, payloadHash); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; /** * @dev Interface of the IOFT core standard */ interface ICommonOFT is IERC165 { struct LzCallParams { address payable refundAddress; address zroPaymentAddress; bytes adapterParams; } /** * @dev estimate send token `_tokenId` to (`_dstChainId`, `_toAddress`) * _dstChainId - L0 defined chain id to send tokens too * _toAddress - dynamic bytes array which contains the address to whom you are sending tokens to on the dstChain * _amount - amount of the tokens to transfer * _useZro - indicates to use zro to pay L0 fees * _adapterParam - flexible bytes array to indicate messaging adapter services in L0 */ function estimateSendFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes calldata _adapterParams) external view returns (uint nativeFee, uint zroFee); function estimateSendAndCallFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, bool _useZro, bytes calldata _adapterParams) external view returns (uint nativeFee, uint zroFee); /** * @dev returns the circulating amount of tokens on current chain */ function circulatingSupply() external view returns (uint); /** * @dev returns the address of the ERC20 token */ function token() external view returns (address); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.5.0; interface IOFTReceiverV2 { /** * @dev Called by the OFT contract when tokens are received from source chain. * @param _srcChainId The chain id of the source chain. * @param _srcAddress The address of the OFT token contract on the source chain. * @param _nonce The nonce of the transaction on the source chain. * @param _from The address of the account who calls the sendAndCall() on the source chain. * @param _amount The amount of tokens to transfer. * @param _payload Additional data with no specified format. */ function onOFTReceived(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes32 _from, uint _amount, bytes calldata _payload) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../../lzApp/NonblockingLzApp.sol"; import "../../../util/ExcessivelySafeCall.sol"; import "./ICommonOFT.sol"; import "./IOFTReceiverV2.sol"; abstract contract OFTCoreV2 is NonblockingLzApp { using BytesLib for bytes; using ExcessivelySafeCall for address; uint public constant NO_EXTRA_GAS = 0; // packet type uint8 public constant PT_SEND = 0; uint8 public constant PT_SEND_AND_CALL = 1; uint8 public immutable sharedDecimals; bool public useCustomAdapterParams; mapping(uint16 => mapping(bytes => mapping(uint64 => AmountForCall))) public amountsForCall; struct AmountForCall { uint amount; bool credited; } /** * @dev Emitted when `_amount` tokens are moved from the `_sender` to (`_dstChainId`, `_toAddress`) * `_nonce` is the outbound nonce */ event SendToChain(uint16 indexed _dstChainId, address indexed _from, bytes32 indexed _toAddress, uint _amount); /** * @dev Emitted when `_amount` tokens are received from `_srcChainId` into the `_toAddress` on the local chain. * `_nonce` is the inbound nonce. */ event ReceiveFromChain(uint16 indexed _srcChainId, address indexed _to, uint _amount); event SetUseCustomAdapterParams(bool _useCustomAdapterParams); event CallOFTReceivedSuccess(uint16 indexed _srcChainId, bytes _srcAddress, uint64 _nonce, bytes32 _hash); event NonContractAddress(address _address); // _sharedDecimals should be the minimum decimals on all chains constructor(uint8 _sharedDecimals, address _lzEndpoint) NonblockingLzApp(_lzEndpoint) { sharedDecimals = _sharedDecimals; } /************************************************************************ * public functions ************************************************************************/ function callOnOFTReceived(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes32 _from, address _to, uint _amount, bytes calldata _payload, uint _gasForCall) public virtual { require(_msgSender() == address(this), "OFTCore: caller must be OFTCore"); // send _amount = _transferFrom(address(this), _to, _amount); emit ReceiveFromChain(_srcChainId, _to, _amount); // call IOFTReceiverV2(_to).onOFTReceived{gas: _gasForCall}(_srcChainId, _srcAddress, _nonce, _from, _amount, _payload); } function setUseCustomAdapterParams(bool _useCustomAdapterParams) public virtual onlyOwner { useCustomAdapterParams = _useCustomAdapterParams; emit SetUseCustomAdapterParams(_useCustomAdapterParams); } /************************************************************************ * internal functions ************************************************************************/ function _estimateSendFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes memory _adapterParams) internal view virtual returns (uint nativeFee, uint zroFee) { // mock the payload for sendFrom() bytes memory payload = _encodeSendPayload(_toAddress, _ld2sd(_amount)); return lzEndpoint.estimateFees(_dstChainId, address(this), payload, _useZro, _adapterParams); } function _estimateSendAndCallFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes memory _payload, uint64 _dstGasForCall, bool _useZro, bytes memory _adapterParams) internal view virtual returns (uint nativeFee, uint zroFee) { // mock the payload for sendAndCall() bytes memory payload = _encodeSendAndCallPayload(msg.sender, _toAddress, _ld2sd(_amount), _payload, _dstGasForCall); return lzEndpoint.estimateFees(_dstChainId, address(this), payload, _useZro, _adapterParams); } function _nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual override { uint8 packetType = _payload.toUint8(0); if (packetType == PT_SEND) { _sendAck(_srcChainId, _srcAddress, _nonce, _payload); } else if (packetType == PT_SEND_AND_CALL) { _sendAndCallAck(_srcChainId, _srcAddress, _nonce, _payload); } else { revert("OFTCore: unknown packet type"); } } function _send(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams) internal virtual returns (uint amount) { _checkAdapterParams(_dstChainId, PT_SEND, _adapterParams, NO_EXTRA_GAS); (amount,) = _removeDust(_amount); amount = _debitFrom(_from, _dstChainId, _toAddress, amount); // amount returned should not have dust require(amount > 0, "OFTCore: amount too small"); bytes memory lzPayload = _encodeSendPayload(_toAddress, _ld2sd(amount)); _lzSend(_dstChainId, lzPayload, _refundAddress, _zroPaymentAddress, _adapterParams, msg.value); emit SendToChain(_dstChainId, _from, _toAddress, amount); } function _sendAck(uint16 _srcChainId, bytes memory, uint64, bytes memory _payload) internal virtual { (address to, uint64 amountSD) = _decodeSendPayload(_payload); if (to == address(0)) { to = address(0xdead); } uint amount = _sd2ld(amountSD); amount = _creditTo(_srcChainId, to, amount); emit ReceiveFromChain(_srcChainId, to, amount); } function _sendAndCall(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes memory _payload, uint64 _dstGasForCall, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams) internal virtual returns (uint amount) { _checkAdapterParams(_dstChainId, PT_SEND_AND_CALL, _adapterParams, _dstGasForCall); (amount,) = _removeDust(_amount); amount = _debitFrom(_from, _dstChainId, _toAddress, amount); require(amount > 0, "OFTCore: amount too small"); // encode the msg.sender into the payload instead of _from bytes memory lzPayload = _encodeSendAndCallPayload(msg.sender, _toAddress, _ld2sd(amount), _payload, _dstGasForCall); _lzSend(_dstChainId, lzPayload, _refundAddress, _zroPaymentAddress, _adapterParams, msg.value); emit SendToChain(_dstChainId, _from, _toAddress, amount); } function _sendAndCallAck(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual { (bytes32 from, address to, uint64 amountSD, bytes memory payloadForCall, uint64 gasForCall) = _decodeSendAndCallPayload(_payload); AmountForCall memory amountForCall = amountsForCall[_srcChainId][_srcAddress][_nonce]; uint amount = amountForCall.amount; // credit to this contract first, and then transfer to receiver only if callOnOFTReceived() succeeds if (!amountForCall.credited) { amount = _sd2ld(amountSD); amount = _creditTo(_srcChainId, address(this), amount); amountsForCall[_srcChainId][_srcAddress][_nonce] = AmountForCall(amount, true); } if (!_isContract(to)) { emit NonContractAddress(to); return; } // workaround for stack too deep uint16 srcChainId = _srcChainId; bytes memory srcAddress = _srcAddress; uint64 nonce = _nonce; bytes memory payload = _payload; bytes32 from_ = from; address to_ = to; uint amount_ = amount; bytes memory payloadForCall_ = payloadForCall; // no gas limit for the call if retry uint gas = amountForCall.credited ? gasleft() : gasForCall; (bool success, bytes memory reason) = address(this).excessivelySafeCall(gasleft(), 150, abi.encodeWithSelector(this.callOnOFTReceived.selector, srcChainId, srcAddress, nonce, from_, to_, amount_, payloadForCall_, gas)); if (success) { bytes32 hash = keccak256(payload); emit CallOFTReceivedSuccess(srcChainId, srcAddress, nonce, hash); } else { // store the failed message into the nonblockingLzApp _storeFailedMessage(srcChainId, srcAddress, nonce, payload, reason); } } function _isContract(address _account) internal view returns (bool) { return _account.code.length > 0; } function _checkAdapterParams(uint16 _dstChainId, uint16 _pkType, bytes memory _adapterParams, uint _extraGas) internal virtual { if (useCustomAdapterParams) { _checkGasLimit(_dstChainId, _pkType, _adapterParams, _extraGas); } else { require(_adapterParams.length == 0, "OFTCore: _adapterParams must be empty."); } } function _ld2sd(uint _amount) internal virtual view returns (uint64) { uint amountSD = _amount / _ld2sdRate(); require(amountSD <= type(uint64).max, "OFTCore: amountSD overflow"); return uint64(amountSD); } function _sd2ld(uint64 _amountSD) internal virtual view returns (uint) { return _amountSD * _ld2sdRate(); } function _removeDust(uint _amount) internal virtual view returns (uint amountAfter, uint dust) { dust = _amount % _ld2sdRate(); amountAfter = _amount - dust; } function _encodeSendPayload(bytes32 _toAddress, uint64 _amountSD) internal virtual view returns (bytes memory) { return abi.encodePacked(PT_SEND, _toAddress, _amountSD); } function _decodeSendPayload(bytes memory _payload) internal virtual view returns (address to, uint64 amountSD) { require(_payload.toUint8(0) == PT_SEND && _payload.length == 41, "OFTCore: invalid payload"); to = _payload.toAddress(13); // drop the first 12 bytes of bytes32 amountSD = _payload.toUint64(33); } function _encodeSendAndCallPayload(address _from, bytes32 _toAddress, uint64 _amountSD, bytes memory _payload, uint64 _dstGasForCall) internal virtual view returns (bytes memory) { return abi.encodePacked( PT_SEND_AND_CALL, _toAddress, _amountSD, _addressToBytes32(_from), _dstGasForCall, _payload ); } function _decodeSendAndCallPayload(bytes memory _payload) internal virtual view returns (bytes32 from, address to, uint64 amountSD, bytes memory payload, uint64 dstGasForCall) { require(_payload.toUint8(0) == PT_SEND_AND_CALL, "OFTCore: invalid payload"); to = _payload.toAddress(13); // drop the first 12 bytes of bytes32 amountSD = _payload.toUint64(33); from = _payload.toBytes32(41); dstGasForCall = _payload.toUint64(73); payload = _payload.slice(81, _payload.length - 81); } function _addressToBytes32(address _address) internal pure virtual returns (bytes32) { return bytes32(uint(uint160(_address))); } function _debitFrom(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount) internal virtual returns (uint); function _creditTo(uint16 _srcChainId, address _toAddress, uint _amount) internal virtual returns (uint); function _transferFrom(address _from, address _to, uint _amount) internal virtual returns (uint); function _ld2sdRate() internal view virtual returns (uint); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../OFTCoreV2.sol"; import "./IOFTWithFee.sol"; import "./Fee.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; abstract contract BaseOFTWithFee is OFTCoreV2, Fee, ERC165, IOFTWithFee { constructor(uint8 _sharedDecimals, address _lzEndpoint) OFTCoreV2(_sharedDecimals, _lzEndpoint) { } /************************************************************************ * public functions ************************************************************************/ function sendFrom(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, uint _minAmount, LzCallParams calldata _callParams) public payable virtual override { (_amount,) = _payOFTFee(_from, _dstChainId, _amount); _amount = _send(_from, _dstChainId, _toAddress, _amount, _callParams.refundAddress, _callParams.zroPaymentAddress, _callParams.adapterParams); require(_amount >= _minAmount, "BaseOFTWithFee: amount is less than minAmount"); } function sendAndCall(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, uint _minAmount, bytes calldata _payload, uint64 _dstGasForCall, LzCallParams calldata _callParams) public payable virtual override { (_amount,) = _payOFTFee(_from, _dstChainId, _amount); _amount = _sendAndCall(_from, _dstChainId, _toAddress, _amount, _payload, _dstGasForCall, _callParams.refundAddress, _callParams.zroPaymentAddress, _callParams.adapterParams); require(_amount >= _minAmount, "BaseOFTWithFee: amount is less than minAmount"); } /************************************************************************ * public view functions ************************************************************************/ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IOFTWithFee).interfaceId || super.supportsInterface(interfaceId); } function estimateSendFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes calldata _adapterParams) public view virtual override returns (uint nativeFee, uint zroFee) { return _estimateSendFee(_dstChainId, _toAddress, _amount, _useZro, _adapterParams); } function estimateSendAndCallFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, bool _useZro, bytes calldata _adapterParams) public view virtual override returns (uint nativeFee, uint zroFee) { return _estimateSendAndCallFee(_dstChainId, _toAddress, _amount, _payload, _dstGasForCall, _useZro, _adapterParams); } function circulatingSupply() public view virtual override returns (uint); function token() public view virtual override returns (address); function _transferFrom(address _from, address _to, uint _amount) internal virtual override (Fee, OFTCoreV2) returns (uint); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; abstract contract Fee is Ownable { uint public constant BP_DENOMINATOR = 10000; mapping(uint16 => FeeConfig) public chainIdToFeeBps; uint16 public defaultFeeBp; address public feeOwner; // defaults to owner struct FeeConfig { uint16 feeBP; bool enabled; } event SetFeeBp(uint16 dstchainId, bool enabled, uint16 feeBp); event SetDefaultFeeBp(uint16 feeBp); event SetFeeOwner(address feeOwner); constructor(){ feeOwner = owner(); } function setDefaultFeeBp(uint16 _feeBp) public virtual onlyOwner { require(_feeBp <= BP_DENOMINATOR, "Fee: fee bp must be <= BP_DENOMINATOR"); defaultFeeBp = _feeBp; emit SetDefaultFeeBp(defaultFeeBp); } function setFeeBp(uint16 _dstChainId, bool _enabled, uint16 _feeBp) public virtual onlyOwner { require(_feeBp <= BP_DENOMINATOR, "Fee: fee bp must be <= BP_DENOMINATOR"); chainIdToFeeBps[_dstChainId] = FeeConfig(_feeBp, _enabled); emit SetFeeBp(_dstChainId, _enabled, _feeBp); } function setFeeOwner(address _feeOwner) public virtual onlyOwner { require(_feeOwner != address(0x0), "Fee: feeOwner cannot be 0x"); feeOwner = _feeOwner; emit SetFeeOwner(_feeOwner); } function quoteOFTFee(uint16 _dstChainId, uint _amount) public virtual view returns (uint fee) { FeeConfig memory config = chainIdToFeeBps[_dstChainId]; if (config.enabled) { fee = _amount * config.feeBP / BP_DENOMINATOR; } else if (defaultFeeBp > 0) { fee = _amount * defaultFeeBp / BP_DENOMINATOR; } else { fee = 0; } } function _payOFTFee(address _from, uint16 _dstChainId, uint _amount) internal virtual returns (uint amount, uint fee) { fee = quoteOFTFee(_dstChainId, _amount); amount = _amount - fee; if (fee > 0) { _transferFrom(_from, feeOwner, fee); } } function _transferFrom(address _from, address _to, uint _amount) internal virtual returns (uint); }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "../ICommonOFT.sol"; /** * @dev Interface of the IOFT core standard */ interface IOFTWithFee is ICommonOFT { /** * @dev send `_amount` amount of token to (`_dstChainId`, `_toAddress`) from `_from` * `_from` the owner of token * `_dstChainId` the destination chain identifier * `_toAddress` can be any size depending on the `dstChainId`. * `_amount` the quantity of tokens in wei * `_minAmount` the minimum amount of tokens to receive on dstChain * `_refundAddress` the address LayerZero refunds if too much message fee is sent * `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token) * `_adapterParams` is a flexible bytes array to indicate messaging adapter services */ function sendFrom(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, uint _minAmount, LzCallParams calldata _callParams) external payable; function sendAndCall(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, uint _minAmount, bytes calldata _payload, uint64 _dstGasForCall, LzCallParams calldata _callParams) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "./BaseOFTWithFee.sol"; contract OFTWithFee is BaseOFTWithFee, ERC20 { uint internal immutable ld2sdRate; constructor(string memory _name, string memory _symbol, uint8 _sharedDecimals, address _lzEndpoint) ERC20(_name, _symbol) BaseOFTWithFee(_sharedDecimals, _lzEndpoint) { uint8 decimals = decimals(); require(_sharedDecimals <= decimals, "OFTWithFee: sharedDecimals must be <= decimals"); ld2sdRate = 10 ** (decimals - _sharedDecimals); } /************************************************************************ * public functions ************************************************************************/ function circulatingSupply() public view virtual override returns (uint) { return totalSupply(); } function token() public view virtual override returns (address) { return address(this); } /************************************************************************ * internal functions ************************************************************************/ function _debitFrom(address _from, uint16, bytes32, uint _amount) internal virtual override returns (uint) { address spender = _msgSender(); if (_from != spender) _spendAllowance(_from, spender, _amount); _burn(_from, _amount); return _amount; } function _creditTo(uint16, address _toAddress, uint _amount) internal virtual override returns (uint) { _mint(_toAddress, _amount); return _amount; } function _transferFrom(address _from, address _to, uint _amount) internal virtual override returns (uint) { address spender = _msgSender(); // if transfer from this contract, no need to check allowance if (_from != address(this) && _from != spender) _spendAllowance(_from, spender, _amount); _transfer(_from, _to, _amount); return _amount; } function _ld2sdRate() internal view virtual override returns (uint) { return ld2sdRate; } }
// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity >=0.8.0 <0.9.0; library BytesLib { function concat( bytes memory _preBytes, bytes memory _postBytes ) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore(0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. )) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and( fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00 ), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1 , "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) } eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function equalStorage( bytes storage _preBytes, bytes memory _postBytes ) internal view returns (bool) { bool success = true; assembly { // we know _preBytes_offset is 0 let fslot := sload(_preBytes.slot) // Decode the length of the stored array like in concatStorage(). let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) // if lengths don't match the arrays are not equal switch eq(slength, mlength) case 1 { // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage if iszero(iszero(slength)) { switch lt(slength, 32) case 1 { // blank the last byte which is the length fslot := mul(div(fslot, 0x100), 0x100) if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) { // unsuccess: success := 0 } } default { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := keccak256(0x0, 0x20) let mc := add(_postBytes, 0x20) let end := add(mc, mlength) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) for {} eq(add(lt(mc, end), cb), 2) { sc := add(sc, 1) mc := add(mc, 0x20) } { if iszero(eq(sload(sc), mload(mc))) { // unsuccess: success := 0 cb := 0 } } } } } default { // unsuccess: success := 0 } } return success; } }
// SPDX-License-Identifier: MIT OR Apache-2.0 pragma solidity >=0.7.6; library ExcessivelySafeCall { uint256 constant LOW_28_MASK = 0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff; /// @notice Use when you _really_ really _really_ don't trust the called /// contract. This prevents the called contract from causing reversion of /// the caller in as many ways as we can. /// @dev The main difference between this and a solidity low-level call is /// that we limit the number of bytes that the callee can cause to be /// copied to caller memory. This prevents stupid things like malicious /// contracts returning 10,000,000 bytes causing a local OOG when copying /// to memory. /// @param _target The address to call /// @param _gas The amount of gas to forward to the remote contract /// @param _maxCopy The maximum number of bytes of returndata to copy /// to memory. /// @param _calldata The data to send to the remote contract /// @return success and returndata, as `.call()`. Returndata is capped to /// `_maxCopy` bytes. function excessivelySafeCall( address _target, uint256 _gas, uint16 _maxCopy, bytes memory _calldata ) internal returns (bool, bytes memory) { // set up for assembly call uint256 _toCopy; bool _success; bytes memory _returnData = new bytes(_maxCopy); // dispatch message to recipient // by assembly calling "handle" function // we call via assembly to avoid memcopying a very large returndata // returned by a malicious contract assembly { _success := call( _gas, // gas _target, // recipient 0, // ether value add(_calldata, 0x20), // inloc mload(_calldata), // inlen 0, // outloc 0 // outlen ) // limit our copy to 256 bytes _toCopy := returndatasize() if gt(_toCopy, _maxCopy) { _toCopy := _maxCopy } // Store the length of the copied bytes mstore(_returnData, _toCopy) // copy the bytes from returndata[0:_toCopy] returndatacopy(add(_returnData, 0x20), 0, _toCopy) } return (_success, _returnData); } /// @notice Use when you _really_ really _really_ don't trust the called /// contract. This prevents the called contract from causing reversion of /// the caller in as many ways as we can. /// @dev The main difference between this and a solidity low-level call is /// that we limit the number of bytes that the callee can cause to be /// copied to caller memory. This prevents stupid things like malicious /// contracts returning 10,000,000 bytes causing a local OOG when copying /// to memory. /// @param _target The address to call /// @param _gas The amount of gas to forward to the remote contract /// @param _maxCopy The maximum number of bytes of returndata to copy /// to memory. /// @param _calldata The data to send to the remote contract /// @return success and returndata, as `.call()`. Returndata is capped to /// `_maxCopy` bytes. function excessivelySafeStaticCall( address _target, uint256 _gas, uint16 _maxCopy, bytes memory _calldata ) internal view returns (bool, bytes memory) { // set up for assembly call uint256 _toCopy; bool _success; bytes memory _returnData = new bytes(_maxCopy); // dispatch message to recipient // by assembly calling "handle" function // we call via assembly to avoid memcopying a very large returndata // returned by a malicious contract assembly { _success := staticcall( _gas, // gas _target, // recipient add(_calldata, 0x20), // inloc mload(_calldata), // inlen 0, // outloc 0 // outlen ) // limit our copy to 256 bytes _toCopy := returndatasize() if gt(_toCopy, _maxCopy) { _toCopy := _maxCopy } // Store the length of the copied bytes mstore(_returnData, _toCopy) // copy the bytes from returndata[0:_toCopy] returndatacopy(add(_returnData, 0x20), 0, _toCopy) } return (_success, _returnData); } /** * @notice Swaps function selectors in encoded contract calls * @dev Allows reuse of encoded calldata for functions with identical * argument types but different names. It simply swaps out the first 4 bytes * for the new selector. This function modifies memory in place, and should * only be used with caution. * @param _newSelector The new 4-byte selector * @param _buf The encoded contract args */ function swapSelector(bytes4 _newSelector, bytes memory _buf) internal pure { require(_buf.length >= 4); uint256 _mask = LOW_28_MASK; assembly { // load the first word of let _word := mload(add(_buf, 0x20)) // mask out the top 4 bytes // /x _word := and(_word, _mask) _word := or(_newSelector, _word) mstore(add(_buf, 0x20), _word) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: 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 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 200 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
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- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000066a71dcef29a0ffbdbe3c6a460a3b5bc225cd675
-----Decoded View---------------
Arg [0] : _lzEndpoint (address): 0x66A71Dcef29A0fFBDBE3c6a460a3B5BC225Cd675
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000066a71dcef29a0ffbdbe3c6a460a3b5bc225cd675
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