ETH Price: $3,479.84 (+0.71%)
Gas: 3.86 Gwei

Token

PancakeSwap Token (Cake)
 

Overview

Max Total Supply

4,258,045.46861841 Cake

Holders

15,949 ( -0.013%)

Market

Price

$2.59 @ 0.000744 ETH (+2.17%)

Onchain Market Cap

$11,028,337.76

Circulating Supply Market Cap

$753,875,569.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 Cake

Value
$0.00
0xe57746cfc46a3152acf02beefd723e2d7553b097
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OVERVIEW

PancakeSwap is a yield farming project whereby users can get FLIP (LP token) for staking and get CAKE token as reward. CAKE holders can swap CAKE for SYRUP for additional incentivized staking.

Market

Volume (24H):$122,493,658.00
Market Capitalization:$753,875,569.00
Circulating Supply:290,882,089.00 Cake
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
CAKE-USDT$2.59
0.0007415 Eth
$19,089,921.00
7,501,685.720 CAKE
24.4865%
2
Ourbit
CAKE-USDT$2.59
0.0007403 Eth
$5,485,724.00
2,156,747.750 CAKE
7.0399%
3
WhiteBIT
CAKE-USDT$2.59
0.0007407 Eth
$4,457,922.00
1,720,890.460 CAKE
5.6172%
4
Bitrue
CAKE-XRP$2.59
0.0007408 Eth
$3,099,982.00
1,198,118.670 CAKE
3.9108%
5
PancakeSwap (v2)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.59
0.0007439 Eth
$2,993,505.00
1,167,851.395 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
3.8120%
6
XT.COM
CAKE-USDT$2.59
0.0007409 Eth
$2,734,491.00
1,075,004.910 CAKE
3.5090%
7
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955$2.58
0.0007407 Eth
$2,588,741.00
1,018,733.237 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
3.3253%
8
Bybit
CAKE-USDT$2.58
0.0007420 Eth
$2,290,027.00
898,244.012 CAKE
2.9320%
9
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.59
0.0007438 Eth
$2,054,440.00
801,960.519 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
2.6177%
10
Azbit
CAKE-USDT$2.59
0.0007409 Eth
$1,881,205.00
739,073.781 CAKE
2.4124%
11
Bitrue
CAKE-USDT$2.59
0.0007411 Eth
$1,867,130.00
721,349.220 CAKE
2.3546%
12
Websea
CAKE-USDT$2.58
0.0007421 Eth
$1,789,752.00
0.000 CAKE
0.0000%
13
CoinEx
CAKE-USDT$2.59
0.0007418 Eth
$1,715,365.00
669,847.931 CAKE
2.1865%
14
OrangeX
CAKE-USDT$2.58
0.0007405 Eth
$1,710,922.00
673,572.060 CAKE
2.1986%
15
Gate.io
CAKE-USDT$2.58
0.0007417 Eth
$1,586,110.00
624,577.500 CAKE
2.0387%
16
CoinW
CAKE-USDT$2.59
0.0007409 Eth
$1,474,323.00
569,035.373 CAKE
1.8574%
17
Phemex
CAKE-USDT$2.59
0.0007413 Eth
$1,428,414.00
551,909.900 CAKE
1.8015%
18
BTSE
CAKE-USDT$2.59
0.0007416 Eth
$1,314,042.00
507,252.648 CAKE
1.6557%
19
Bitunix
CAKE-USDT$2.58
0.0007416 Eth
$1,275,713.00
493,490.090 CAKE
1.6108%
20
LBank
CAKE-USDT$2.58
0.0007400 Eth
$1,206,466.00
467,538.930 CAKE
1.5261%
21
Hotcoin
CAKE-USDT$2.59
0.0007404 Eth
$1,131,914.00
436,994.670 CAKE
1.4264%
22
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.59
0.0007438 Eth
$1,070,074.00
417,472.287 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
1.3627%
23
MEXC
CAKE-USDT$2.58
0.0007400 Eth
$984,206.00
381,139.410 CAKE
1.2441%
24
Coinstore
CAKE-USDT$2.58
0.0007398 Eth
$944,297.00
371,704.530 CAKE
1.2133%
25
FameEX
CAKE-USDT$2.58
0.0007403 Eth
$827,443.00
325,908.436 CAKE
1.0638%
26
BYDFi
CAKE-USDT$2.59
0.0007404 Eth
$820,003.00
316,848.560 CAKE
1.0342%
27
Trubit
CAKE-USDT$2.58
0.0007422 Eth
$732,221.00
286,603.590 CAKE
0.9355%
28
QMall
CAKE-USDT$2.58
0.0007390 Eth
$715,101.00
281,120.607 CAKE
0.9176%
29
Bitget
CAKE-USDT$2.58
0.0007416 Eth
$662,391.00
259,756.455 CAKE
0.8479%
30
BVOX
CAKE-USDT$2.59
0.0007407 Eth
$649,470.00
256,355.410 CAKE
0.8368%
31
Uniswap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955$2.55
0.0007334 Eth
$649,369.00
259,276.322 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.8463%
32
Dex-Trade
CAKE-USDT$2.58
0.0007391 Eth
$613,607.00
238,101.920 CAKE
0.7772%
33
Hibt
CAKE-USDT$2.59
0.0007404 Eth
$571,045.00
224,465.504 CAKE
0.7327%
34
KuCoin
CAKE-USDT$2.58
0.0007419 Eth
$570,358.00
220,719.720 CAKE
0.7205%
35
FMCPAY
CAKE-USDT$2.59
0.0007401 Eth
$450,526.00
177,704.174 CAKE
0.5801%
36
Fastex
CAKE-USDT$2.58
0.0007419 Eth
$433,360.00
167,820.429 CAKE
0.5478%
37
Toobit
CAKE-USDT$2.58
0.0007413 Eth
$391,438.00
154,099.340 CAKE
0.5030%
38
Azbit
CAKE-BTC$2.58
0.0007405 Eth
$390,682.00
149,904.628 CAKE
0.4893%
39
DigiFinex
CAKE-USDT$2.58
0.0007416 Eth
$351,691.00
136,151.560 CAKE
0.4444%
40
LATOKEN
CAKE-USDT$2.58
0.0007405 Eth
$340,386.00
131,732.838 CAKE
0.4300%
41
BingX
CAKE-USDT$2.58
0.0007413 Eth
$337,262.00
132,747.344 CAKE
0.4333%
42
Biconomy.com
CAKE-USDT$2.59
0.0007395 Eth
$322,949.00
127,517.170 CAKE
0.4162%
43
PointPay
CAKE-USDT$2.58
0.0007413 Eth
$311,327.00
122,329.610 CAKE
0.3993%
44
Bitazza
CAKE-USDT$2.58
0.0007373 Eth
$294,074.00
116,248.400 CAKE
0.3795%
45
Tokpie
CAKE-USDT$2.58
0.0007365 Eth
$264,573.00
102,626.597 CAKE
0.3350%
46
BitDelta
CAKE-USDT$2.59
0.0007402 Eth
$236,575.00
93,396.910 CAKE
0.3049%
47
Koinpark
CAKE-USDT$2.59
0.0007404 Eth
$223,573.00
86,314.178 CAKE
0.2817%
48
HTX
CAKE-USDT$2.58
0.0007418 Eth
$222,370.00
87,860.100 CAKE
0.2868%
49
Pionex
CAKE-USDT$2.58
0.0007421 Eth
$220,576.00
86,089.294 CAKE
0.2810%
50
PancakeSwap (v2)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X55D398326F99059FF775485246999027B3197955$2.57
0.0007394 Eth
$210,787.00
83,552.080 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.2727%
51
Byte Exchange
CAKE-USDT$2.60
0.0007425 Eth
$193,107.00
74,299.593 CAKE
0.2425%
52
BitMart
CAKE-USDT$2.58
0.0007425 Eth
$180,038.00
69,680.120 CAKE
0.2274%
53
PancakeSwap V1 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.59
0.0007436 Eth
$151,282.00
58,995.920 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.1926%
54
Tapbit
CAKE-USDT$2.58
0.0007400 Eth
$144,696.00
57,134.000 CAKE
0.1865%
55
Koinpark
CAKE-INR$2.60
0.0007442 Eth
$132,231.00
50,787.596 CAKE
0.1658%
56
Nonkyc.io
CAKE-BNB$2.57
0.0007380 Eth
$128,359.00
50,296.290 CAKE
0.1642%
57
PancakeSwap (v2)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XE9E7CEA3DEDCA5984780BAFC599BD69ADD087D56$2.59
0.0007443 Eth
$103,603.00
40,803.562 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.1332%
58
Tokpie
CAKE-WBTC$2.59
0.0007412 Eth
$99,616.00
38,395.149 CAKE
0.1253%
59
Binance
CAKE-BTC$2.59
0.0007422 Eth
$99,444.00
37,923.640 CAKE
0.1238%
60
LocalTrade
CAKE-USDT$2.59
0.0007409 Eth
$97,361.00
37,642.630 CAKE
0.1229%
61
Binance
CAKE-TRY$2.61
0.0007449 Eth
$94,980.00
37,130.760 CAKE
0.1212%
62
Binance
CAKE-BNB$2.57
0.0007400 Eth
$71,437.00
27,890.670 CAKE
0.0910%
63
Bitvavo
CAKE-EUR$2.60
0.0007454 Eth
$67,447.00
25,979.698 CAKE
0.0848%
64
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C$2.60
0.0007457 Eth
$65,662.00
25,045.824 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0818%
65
Tokpie
CAKE-BNB$2.58
0.0007426 Eth
$49,228.00
19,046.326 CAKE
0.0622%
66
FMCPAY
CAKE-BTC$2.58
0.0007402 Eth
$43,305.00
16,600.480 CAKE
0.0542%
67
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X2170ED0880AC9A755FD29B2688956BD959F933F8$2.58
0.0007405 Eth
$41,518.00
16,176.186 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0528%
68
Tokpie
CAKE-ETH$2.59
0.0007407 Eth
$35,543.00
13,745.717 CAKE
0.0449%
69
Tothemoon
CAKE-USDT$2.59
0.0007392 Eth
$33,747.00
13,040.580 CAKE
0.0426%
70
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.58
0.0007423 Eth
$27,194.00
10,783.909 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0352%
71
PancakeSwap (Aptos)
0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT-0XF22BEDE237A07E121B56D91A491EB7BCDFD1F5907926A9E58338F964A01B17FA::ASSET::USDC$2.58
0.0007385 Eth
$27,066.00
10,755.867 0X159DF6B7689437016108A019FD5BEF736BAC692B6D4A1F10C941F6FBB9A74CA6::OFT::CAKEOFT
0.0351%
72
WEEX
CAKE-USDT$2.58
0.0007383 Eth
$26,872.00
10,582.000 CAKE
0.0345%
73
bitcastle
CAKE-USDT$2.58
0.0007419 Eth
$24,320.00
9,547.410 CAKE
0.0312%
74
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XE9E7CEA3DEDCA5984780BAFC599BD69ADD087D56$2.59
0.0007444 Eth
$23,535.00
9,245.352 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0302%
75
Uniswap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$2.55
0.0007334 Eth
$22,051.00
8,592.882 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0280%
76
PancakeSwap V3 (Base)
0X3055913C90FCC1A6CE9A358911721EEB942013A1-0X4200000000000000000000000000000000000006$2.57
0.0007376 Eth
$19,603.08
7,568.514 0X3055913C90FCC1A6CE9A358911721EEB942013A1
0.0247%
77
PancakeSwap V3 (Arbitrum)
0X1B896893DFC86BB67CF57767298B9073D2C1BA2C-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$2.58
0.0007390 Eth
$17,841.14
6,934.296 0X1B896893DFC86BB67CF57767298B9073D2C1BA2C
0.0226%
78
Uniswap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XBF5140A22578168FD562DCCF235E5D43A02CE9B1$2.55
0.0007334 Eth
$15,685.05
6,043.655 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0197%
79
PancakeSwap V3 (Ethereum)
0X152649EA73BEAB28C5B49B26EB48F7EAD6D4C898-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$2.59
0.0007416 Eth
$14,858.58
5,742.658 0X152649EA73BEAB28C5B49B26EB48F7EAD6D4C898
0.0187%
80
Bitexlive
CAKE-USDT$2.58
0.0007391 Eth
$14,779.02
5,734.802 CAKE
0.0187%
81
PancakeSwap (v2)
0XA260E12D2B924CB899AE80BB58123AC3FEE1E2F0-0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82$2.59
0.0007439 Eth
$9,843.34
23,622.798 0XA260E12D2B924CB899AE80BB58123AC3FEE1E2F0
0.0771%
82
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XC5F0F7B66764F6EC8C8DFF7BA683102295E16409$2.58
0.0007424 Eth
$6,483.75
2,554.423 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0083%
83
CoinEx
CAKE-BTC$2.58
0.0007385 Eth
$6,452.30
2,446.661 CAKE
0.0080%
84
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X76A797A59BA2C17726896976B7B3747BFD1D220F$2.59
0.0007426 Eth
$6,204.38
2,406.449 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0079%
85
PancakeSwap V3 (Ethereum)
0X152649EA73BEAB28C5B49B26EB48F7EAD6D4C898-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$2.59
0.0007413 Eth
$4,626.04
1,796.954 0X152649EA73BEAB28C5B49B26EB48F7EAD6D4C898
0.0059%
86
PancakeSwap V3 (zkSync)
0X3A287A06C66F9E95A56327185CA2BDF5F031CECD-0X5AEA5775959FBC2557CC8789BC1BF90A239D9A91$2.59
0.0007421 Eth
$4,583.54
1,770.661 0X3A287A06C66F9E95A56327185CA2BDF5F031CECD
0.0058%
87
PancakeSwap (v2)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$2.59
0.0007409 Eth
$4,375.94
1,295.203 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0042%
88
CoinEx
CAKE-USDC$2.58
0.0007406 Eth
$4,231.08
1,664.211 CAKE
0.0054%
89
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X4C882EC256823EE773B25B414D36F92EF58A7C0C$2.59
0.0007403 Eth
$3,553.98
1,580.918 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0052%
90
TokoCrypto
CAKE-USDT$2.58
0.0007399 Eth
$2,836.02
1,099.201 CAKE
0.0036%
91
LATOKEN
CAKE-BTC$2.60
0.0007443 Eth
$2,530.33
972.178 CAKE
0.0032%
92
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XAFCC12E4040615E7AFE9FB4330EB3D9120ACAC05$2.58
0.0007424 Eth
$2,419.61
944.295 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0031%
93
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XCC42724C6683B7E57334C4E856F4C9965ED682BD$2.56
0.0007368 Eth
$1,840.06
705.446 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0023%
94
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X8263CD1601FE73C066BF49CC09841F35348E3BE0$2.59
0.0007448 Eth
$1,590.49
612.087 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0020%
95
PancakeSwap (v2)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X2170ED0880AC9A755FD29B2688956BD959F933F8$2.58
0.0007388 Eth
$1,107.84
482.498 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0016%
96
PancakeSwap V3 (opBnb)
0X2779106E4F4A8A28D77A24C18283651A2AE22D1C-0X4200000000000000000000000000000000000006$2.56
0.0007341 Eth
$421.74
165.042 0X2779106E4F4A8A28D77A24C18283651A2AE22D1C
0.0005%
97
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$2.59
0.0007389 Eth
$268.74
106.053 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0003%
98
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X99945F484EBC48F5307CC00CF8DCF8D6D3D4B017$2.58
0.0007387 Eth
$259.38
101.526 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0003%
99
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0X9840652DC04FB9DB2C43853633F0F62BE6F00F98$2.59
0.0007392 Eth
$196.69
74.106 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0002%
100
XeggeX
CAKE-USDT$2.60
0.0007456 Eth
$16.11
6.388 CAKE
0.0000%

Contract Source Code Verified (Exact Match)

Contract Name:
CakeOFT

Compiler Version
v0.8.12+commit.f00d7308

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
File 1 of 23 : OFT.sol
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();
    }
}

File 2 of 23 : ILayerZeroEndpoint.sol
// 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);
}

File 3 of 23 : ILayerZeroReceiver.sol
// 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;
}

File 4 of 23 : ILayerZeroUserApplicationConfig.sol
// 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;
}

File 5 of 23 : LzApp.sol
// 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);
    }
}

File 6 of 23 : NonblockingLzApp.sol
// 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);
    }
}

File 7 of 23 : ICommonOFT.sol
// 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);
}

File 8 of 23 : IOFTReceiverV2.sol
// 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;
}

File 9 of 23 : OFTCoreV2.sol
// 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);
}

File 10 of 23 : BaseOFTWithFee.sol
// 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);
}

File 11 of 23 : Fee.sol
// 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);
}

File 12 of 23 : IOFTWithFee.sol
// 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;
}

File 13 of 23 : OFTWithFee.sol
// 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;
    }
}

File 14 of 23 : BytesLib.sol
// 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;
    }
}

File 15 of 23 : ExcessivelySafeCall.sol
// 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)
        }
    }
}

File 16 of 23 : Ownable.sol
// 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);
    }
}

File 17 of 23 : Pausable.sol
// 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());
    }
}

File 18 of 23 : ERC20.sol
// 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 {}
}

File 19 of 23 : IERC20.sol
// 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);
}

File 20 of 23 : IERC20Metadata.sol
// 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);
}

File 21 of 23 : Context.sol
// 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;
    }
}

File 22 of 23 : ERC165.sol
// 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;
    }
}

File 23 of 23 : IERC165.sol
// 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);
}

Settings
{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

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t16","name":"chainId","type":"uint16"},{"indexed":false,"internalType":"uint256","name":"cap","type":"uint256"}],"name":"SetOutboundCap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"precrime","type":"address"}],"name":"SetPrecrime","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"_remoteChainId","type":"uint16"},{"indexed":false,"internalType":"bytes","name":"_path","type":"bytes"}],"name":"SetTrustedRemote","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"_remoteChainId","type":"uint16"},{"indexed":false,"internalType":"bytes","name":"_remoteAddress","type":"bytes"}],"name":"SetTrustedRemoteAddress","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"_useCustomAdapterParams","type":"bool"}],"name":"SetUseCustomAdapterParams","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":false,"internalType":"bool","name":"isWhitelist","type":"bool"}],"name":"SetWhitelist","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"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"BP_DENOMINATOR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"NO_EXTRA_GAS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PT_SEND","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PT_SEND_AND_CALL","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"bytes","name":"","type":"bytes"},{"internalType":"uint64","name":"","type":"uint64"}],"name":"amountsForCall","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"credited","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"},{"internalType":"uint64","name":"_nonce","type":"uint64"},{"internalType":"bytes32","name":"_from","type":"bytes32"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes","name":"_payload","type":"bytes"},{"internalType":"uint256","name":"_gasForCall","type":"uint256"}],"name":"callOnOFTReceived","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToFeeBps","outputs":[{"internalType":"uint16","name":"feeBP","type":"uint16"},{"internalType":"bool","name":"enabled","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToInboundCap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToLastReceivedTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToLastSentTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToOutboundCap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"chainIdToReceivedTokenAmou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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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