├── .gitattributes
├── .gitignore
├── LICENSE
├── README.md
├── contracts
├── Aave.sol
├── Arrays.sol
├── Assembly.sol
├── BulkSend.sol
├── Callback.sol
├── ChainlinkCCIP.sol
├── ContractBalance.sol
├── CustomError.sol
├── Deploy.sol
├── ERC1155.sol
├── ERC20.sol
├── ERC721.sol
├── Enums.sol
├── Events.sol
├── Factory.sol
├── FixedRateStaking.sol
├── Interface.sol
├── IsContract.sol
├── LayerZeroOFT.sol
├── Library.sol
├── Loops.sol
├── Mapping.sol
├── MaxUint256.sol
├── Merkle.sol
├── Modifier.sol
├── MultipleReturns.sol
├── NatspecComments.sol
├── Oracle.sol
├── Override.sol
├── Ownable.sol
├── PassFunction.sol
├── PaymentDivider.sol
├── Pen.sol
├── Random.sol
├── Rewards.sol
├── Shares.sol
├── Shuffle.sol
├── StaggeredSale.sol
├── Structs.sol
├── TernaryOperators.sol
├── TransparentProxy.sol
├── UintToString.sol
├── Uniswap.sol
├── UniswapFlashLoan.sol
├── VCTerms.sol
├── Variables.sol
├── Vault.sol
├── Whitelist.sol
├── encodeCall.sol
└── escrow.sol
├── hardhat.config.js
├── package-lock.json
├── package.json
├── scripts
├── merkleGenerator.js
├── sample-script.js
└── signInWithEthereum.html
└── test
└── sample-test.js
/.gitattributes:
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1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 |
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/.gitignore:
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1 | # Logs
2 | logs
3 | *.log
4 | npm-debug.log*
5 | yarn-debug.log*
6 | yarn-error.log*
7 |
8 | # Runtime data
9 | pids
10 | *.pid
11 | *.seed
12 | *.pid.lock
13 |
14 | # Directory for instrumented libs generated by jscoverage/JSCover
15 | lib-cov
16 |
17 | # Coverage directory used by tools like istanbul
18 | coverage
19 |
20 | # nyc test coverage
21 | .nyc_output
22 |
23 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
24 | .grunt
25 |
26 | # Bower dependency directory (https://bower.io/)
27 | bower_components
28 |
29 | # node-waf configuration
30 | .lock-wscript
31 |
32 | # Compiled binary addons (https://nodejs.org/api/addons.html)
33 | build/Release
34 |
35 | # Dependency directories
36 | node_modules/
37 | jspm_packages/
38 |
39 | # TypeScript v1 declaration files
40 | typings/
41 |
42 | # Optional npm cache directory
43 | .npm
44 |
45 | # Optional eslint cache
46 | .eslintcache
47 |
48 | # Optional REPL history
49 | .node_repl_history
50 |
51 | # Output of 'npm pack'
52 | *.tgz
53 |
54 | # Yarn Integrity file
55 | .yarn-integrity
56 |
57 | # dotenv environment variables file
58 | .env
59 |
60 | # parcel-bundler cache (https://parceljs.org/)
61 | .cache
62 |
63 | # next.js build output
64 | .next
65 |
66 | # nuxt.js build output
67 | .nuxt
68 |
69 | # vuepress build output
70 | .vuepress/dist
71 |
72 | # Serverless directories
73 | .serverless
74 |
75 | # FuseBox cache
76 | .fusebox/
77 |
78 | node_modules
79 | .env
80 | coverage
81 | coverage.json
82 | typechain
83 |
84 | #Hardhat files
85 | cache
86 | artifacts
87 |
--------------------------------------------------------------------------------
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497 | patent against the party.
498 |
499 | If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
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502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
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508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 |
513 | If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
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517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 |
521 | A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License. You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 |
536 | Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 |
540 | 12. No Surrender of Others' Freedom.
541 |
542 | If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License. If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all. For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 |
552 | 13. Use with the GNU Affero General Public License.
553 |
554 | Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work. The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 |
563 | 14. Revised Versions of this License.
564 |
565 | The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time. Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 |
570 | Each version is given a distinguishing version number. If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation. If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 |
579 | If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 |
584 | Later license versions may give you additional or different
585 | permissions. However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 |
589 | 15. Disclaimer of Warranty.
590 |
591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 |
600 | 16. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 |
635 | Copyright (C)
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | Copyright (C)
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 |
2 |
3 | This is a personal dumping ground of untested Solidity code.
4 |
5 | Solidity Tutorials:
6 | https://jamesbachini.com/category/development/solidity/
7 |
8 | All code is for demonstration purposes and should not be used for financial transactions.
9 |
--------------------------------------------------------------------------------
/contracts/Aave.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 |
6 | interface IAave {
7 | function deposit(address asset,uint amount,address onBehalfOf,uint16 referralCode) external;
8 | function borrow(address asset,uint amount,uint interestRateMode,uint16 referralCode,address onBehalfOf) external;
9 | function repay(address asset,uint amount,uint rateMode,address onBehalfOf) external returns (uint);
10 | function withdraw(address asset,uint amount,address to) external returns (uint);
11 | function getUserAccountData(address user) external view returns (uint totalCollateralETH, uint totalDebtETH, uint availableBorrowsETH, uint currentLiquidationThreshold, uint ltv, uint healthFactor);
12 | }
13 |
14 | contract Borrowing {
15 | address public aave = 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9;
16 | address public steth = 0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84;
17 | address public weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
18 |
19 | function borrow() payable public {
20 | uint balance = 1e18; // Assumes contract holds stETH balance
21 | IAave(aave).deposit(steth,balance,address(this),0);
22 | uint borrowAmount = balance * 6 / 10; // 60% collateral to loan
23 | IAave(aave).borrow(weth,borrowAmount,2,0,address(this));
24 | }
25 | }
--------------------------------------------------------------------------------
/contracts/Arrays.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | // Arrays Example
5 | contract Arrays {
6 |
7 | uint[] public myArray = [2,4,6,8,10,12];
8 | uint[4] public myFixedArray = [3,5,1,8];
9 | uint[][] public nestedArray;
10 |
11 | function arrayPush(uint _newNumber) public {
12 | myArray.push(_newNumber);
13 | }
14 |
15 | function arrayLoop() public view {
16 | for (uint i=0; i=0.8.0;
3 |
4 | contract StoringData {
5 | function setDataToMemeory(uint newValue) public {
6 | assembly {
7 | sstore(0, newValue)
8 | }
9 | }
10 |
11 | function getDataFromMemory() public view returns(uint) {
12 | assembly {
13 | let v := sload(0)
14 | mstore(0x80, v)
15 | return(0x80, 32)
16 | }
17 | }
18 | }
19 |
20 | contract SendETH {
21 | address[2] owners = [0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2,0xdD870fA1b7C4700F2BD7f44238821C26f7392148];
22 | function withdrawETH(address _to, uint _amount) external payable {
23 | bool success;
24 | assembly {
25 | for { let i := 0 } lt(i, 2) { i := add(i, 1) } {
26 | let owner := sload(i)
27 | if eq(_to, owner) {
28 | success := call(gas(), _to, _amount, 0, 0, 0, 0)
29 | }
30 | }
31 | }
32 | require(success, "Failed to send ETH");
33 | }
34 | }
35 |
36 | contract UselessEncryption {
37 | function encrypt(string memory _input, bool _decrypt) external pure returns (string memory) {
38 | bytes32 output;
39 | assembly {
40 | function stringToBytes(a) -> b {
41 | b := mload(add(a, 32))
42 | }
43 | function addToBytes(bs,decrypt) -> r {
44 | if eq(decrypt, false) {
45 | mstore(0x0, add(bs,0x0101010101010101010101010101010101010101010101010101010101010101))
46 | }
47 | if eq(decrypt, true) {
48 | mstore(0x0, sub(bs,0x0101010101010101010101010101010101010101010101010101010101010101))
49 | }
50 | r := mload(0x0)
51 | }
52 | let byteString := stringToBytes(_input)
53 | output := addToBytes(byteString,_decrypt)
54 | }
55 | bytes memory bytesArray = new bytes(32);
56 | for (uint i; i < 32; i++) bytesArray[i] = output[i];
57 | return string(bytesArray);
58 | }
59 | }
--------------------------------------------------------------------------------
/contracts/BulkSend.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 | import "@openzeppelin/contracts/access/Ownable.sol";
6 |
7 | /*
8 | This contract shows how to send tokens and ETH to multiple addresses.
9 | Can easily handle 500 addresses in a single transaction via remix, perhaps more.
10 | Send ETH and tokens to the contract prior to executing sendOutFunds
11 | */
12 |
13 | contract BulkSend is Ownable(msg.sender) {
14 | address token = 0x2f3A40A3db8a7e3D09B0adfEfbCe4f6F81927557; // Token Contract Address (Goerli USDC)
15 | uint tokenAmount = 5000 * 1e6; // 5000 tokens
16 | uint ethAmount = 5000000000000000; // 0.005 ETH
17 |
18 | function sendOutFunds(address[] memory _to) public onlyOwner {
19 | for (uint i = 0; i < _to.length; i++) {
20 | IERC20(token).transfer(_to[i], tokenAmount);
21 | payable(_to[i]).transfer(ethAmount);
22 | }
23 | }
24 |
25 | function withdraw() public onlyOwner {
26 | payable(msg.sender).transfer(address(this).balance);
27 | }
28 |
29 | function reclaimToken(IERC20 _token) public onlyOwner {
30 | require(address(_token) != address(0));
31 | uint balance = _token.balanceOf(address(this));
32 | _token.transfer(msg.sender, balance);
33 | }
34 |
35 | receive() external payable {}
36 | fallback() external payable {}
37 | }
--------------------------------------------------------------------------------
/contracts/Callback.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract Parent {
5 | uint public parentVariable;
6 |
7 | function parentFunc(uint _parentVariable, function(uint) external _callback) public {
8 | parentVariable = _parentVariable;
9 | _callback(_parentVariable * 2);
10 | }
11 | }
12 |
13 | contract Child {
14 | address public parentAddress;
15 | uint public childVariable;
16 |
17 | constructor(address _parentAddress) {
18 | parentAddress = _parentAddress;
19 | }
20 |
21 | function run(uint _newVar) public {
22 | Parent(parentAddress).parentFunc(_newVar, this.callback);
23 | }
24 |
25 | function callback(uint _childVariable) external {
26 | childVariable = _childVariable * 2;
27 | }
28 | }
--------------------------------------------------------------------------------
/contracts/ChainlinkCCIP.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity 0.8.19;
3 |
4 | import {IRouterClient} from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol";
5 | import {OwnerIsCreator} from "@chainlink/contracts-ccip/src/v0.8/shared/access/OwnerIsCreator.sol";
6 | import {Client} from "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol";
7 | import {IERC20} from "@chainlink/contracts-ccip/src/v0.8/vendor/openzeppelin-solidity/v4.8.0/token/ERC20/IERC20.sol";
8 | import {LinkTokenInterface} from "@chainlink/contracts/src/v0.8/interfaces/LinkTokenInterface.sol";
9 |
10 | contract ChainlinkCCIP is OwnerIsCreator {
11 | error NotEnoughBalance(uint256 currentBalance, uint256 calculatedFees);
12 |
13 | IRouterClient router;
14 | LinkTokenInterface linkToken;
15 |
16 | constructor(address _router, address _link) {
17 | router = IRouterClient(_router);
18 | linkToken = LinkTokenInterface(_link);
19 | }
20 |
21 | function transferTokens(
22 | uint64 _destinationChainSelector,
23 | address _receiver,
24 | address _token,
25 | uint256 _amount
26 | )
27 | external
28 | onlyOwner
29 | returns (bytes32 messageId)
30 | {
31 | Client.EVM2AnyMessage memory evm2AnyMessage = _buildCCIPMessage(
32 | _receiver,
33 | _token,
34 | _amount,
35 | address(0)
36 | );
37 | uint256 fees = router.getFee(_destinationChainSelector, evm2AnyMessage);
38 | if (fees > address(this).balance)
39 | revert NotEnoughBalance(address(this).balance, fees);
40 | IERC20(_token).approve(address(router), _amount);
41 | messageId = router.ccipSend{value: fees}(
42 | _destinationChainSelector,
43 | evm2AnyMessage
44 | );
45 | return messageId;
46 | }
47 |
48 | function _buildCCIPMessage(
49 | address _receiver,
50 | address _token,
51 | uint256 _amount,
52 | address _feeTokenAddress
53 | ) internal pure returns (Client.EVM2AnyMessage memory) {
54 | Client.EVMTokenAmount[]
55 | memory tokenAmounts = new Client.EVMTokenAmount[](1);
56 | Client.EVMTokenAmount memory tokenAmount = Client.EVMTokenAmount({
57 | token: _token,
58 | amount: _amount
59 | });
60 | tokenAmounts[0] = tokenAmount;
61 | Client.EVM2AnyMessage memory evm2AnyMessage = Client.EVM2AnyMessage({
62 | receiver: abi.encode(_receiver),
63 | data: "",
64 | tokenAmounts: tokenAmounts,
65 | extraArgs: Client._argsToBytes(Client.EVMExtraArgsV1({gasLimit: 0, strict: false})),
66 | feeToken: _feeTokenAddress
67 | });
68 | return evm2AnyMessage;
69 | }
70 |
71 | function withdraw(address _beneficiary, address _token) public onlyOwner {
72 | uint256 amountToken = IERC20(_token).balanceOf(address(this));
73 | IERC20(_token).transfer(_beneficiary, amountToken);
74 | }
75 |
76 | receive() external payable {}
77 | }
--------------------------------------------------------------------------------
/contracts/ContractBalance.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | // import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 | interface IERC20 {
6 | function balanceOf(address account) external view returns (uint);
7 | }
8 |
9 | contract BalanceExample {
10 | uint public ethBalance = address(this).balance;
11 | address private wethTokenAddress = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
12 | uint public wethBalance = IERC20(wethTokenAddress).balanceOf(address(this));
13 | }
14 |
--------------------------------------------------------------------------------
/contracts/CustomError.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.4;
3 |
4 | error MyCustomError(uint var1, uint var2);
5 |
6 | contract CustomErrors {
7 | function test() pure public {
8 | if (1 > 0) revert MyCustomError(1,2);
9 | }
10 | }
--------------------------------------------------------------------------------
/contracts/Deploy.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 |
6 | contract MyToken is ERC20 {
7 | constructor() ERC20("MyToken", "MYTKN") {
8 | _mint(msg.sender, 1e30);
9 | }
10 | }
11 |
12 | contract Deployer {
13 | address public myToken;
14 | constructor() {
15 | myToken = address(new MyToken());
16 | }
17 | // Contract owns all the tokens
18 | }
19 |
--------------------------------------------------------------------------------
/contracts/ERC1155.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
5 |
6 | contract MyNFT is ERC1155 {
7 | uint256 public constant gameItem1 = 1;
8 | uint256 public constant gameItem2 = 2;
9 | uint256 public constant gameItem3 = 3;
10 |
11 | constructor() ERC1155("https://ethereumhacker.com/nfts/{id}.json") {
12 | _mint(msg.sender, gameItem1, 1, "");
13 | _mint(msg.sender, gameItem2, 1, "");
14 | _mint(msg.sender, gameItem3, 100, "");
15 | }
16 | }
--------------------------------------------------------------------------------
/contracts/ERC20.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 |
6 | contract MyToken is ERC20 {
7 | constructor() ERC20("MyToken", "MYTKN") {
8 | _mint(msg.sender, 1000000 ether);
9 | }
10 | }
11 |
--------------------------------------------------------------------------------
/contracts/ERC721.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
5 | import "@openzeppelin/contracts/utils/Base64.sol";
6 |
7 | contract MyNFT is ERC721 {
8 | uint public tokenId;
9 | uint public maxSupply = 1000;
10 |
11 | constructor() ERC721("My NFT", "MFT") {
12 | }
13 |
14 | function tokenURI(uint) override public pure returns (string memory) {
15 | string memory json = Base64.encode(bytes(string(
16 | abi.encodePacked('{"name": "My NFT", "description": "Whatever", "image": "https://ethereumhacker.com/img/nft.png"}')
17 | )));
18 | return string(abi.encodePacked('data:application/json;base64,', json));
19 | }
20 |
21 | function mint() public {
22 | require(tokenId < maxSupply, "All tokens have been minted");
23 | _safeMint(msg.sender, tokenId);
24 | tokenId = tokenId + 1;
25 | }
26 | }
--------------------------------------------------------------------------------
/contracts/Enums.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.0;
3 |
4 | contract Enums {
5 | enum Day { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday }
6 |
7 | function getNextDay(Day _currentDay) public pure returns (Day) {
8 | if (_currentDay == Day.Sunday) return Day.Monday;
9 | return Day(uint(_currentDay) + 1);
10 | }
11 | }
12 |
--------------------------------------------------------------------------------
/contracts/Events.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract Events {
5 | event LogThis(string msg);
6 |
7 | function test() external {
8 | emit LogThis('Hello World');
9 | }
10 | }
11 |
--------------------------------------------------------------------------------
/contracts/Factory.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 |
6 | contract Token is ERC20 {
7 | constructor(string memory _name, string memory _ticker, uint _supply) ERC20(_name, _ticker) {
8 | _mint(msg.sender, _supply);
9 | }
10 | }
11 |
12 | contract Factory {
13 | address[] public tokens;
14 | uint public tokenCount;
15 | event TokenDeployed(address tokenAddress);
16 |
17 | function deployToken(string calldata _name, string calldata _ticker, uint _supply) public returns (address) {
18 | Token token = new Token(_name, _ticker, _supply);
19 | token.transfer(msg.sender, _supply);
20 | tokens.push(address(token));
21 | tokenCount += 1;
22 | emit TokenDeployed(address(token));
23 | return address(token);
24 | }
25 | }
--------------------------------------------------------------------------------
/contracts/FixedRateStaking.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 |
6 | contract FixedStaking is ERC20 {
7 | mapping(address => uint) public staked;
8 | mapping(address => uint) private stakedFromTS;
9 |
10 | constructor() ERC20("Fixed Staking", "FIX") {
11 | _mint(msg.sender,1000000000000000000);
12 | }
13 |
14 | function stake(uint amount) external {
15 | require(amount > 0, "amount is <= 0");
16 | require(balanceOf(msg.sender) >= amount, "balance is <= amount");
17 | _transfer(msg.sender, address(this), amount);
18 | if (staked[msg.sender] > 0) {
19 | claim();
20 | }
21 | stakedFromTS[msg.sender] = block.timestamp;
22 | staked[msg.sender] += amount;
23 | }
24 |
25 | function unstake(uint amount) external {
26 | require(amount > 0, "amount is <= 0");
27 | require(staked[msg.sender] >= amount, "amount is > staked");
28 | claim();
29 | staked[msg.sender] -= amount;
30 | _transfer(address(this), msg.sender, amount);
31 | }
32 |
33 | function claim() public {
34 | require(staked[msg.sender] > 0, "staked is <= 0");
35 | uint secondsStaked = block.timestamp - stakedFromTS[msg.sender];
36 | uint rewards = staked[msg.sender] * secondsStaked / 3.154e7;
37 | _mint(msg.sender,rewards);
38 | stakedFromTS[msg.sender] = block.timestamp;
39 | }
40 | }
--------------------------------------------------------------------------------
/contracts/Interface.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 |
6 | interface AlternateIERC20 {
7 | function totalSupply() external view returns (uint);
8 | function balanceOf(address account) external view returns (uint);
9 | function transfer(address recipient, uint amount) external returns (bool);
10 | function allowance(address owner, address spender) external view returns (uint);
11 | function approve(address spender, uint amount) external returns (bool);
12 | function transferFrom(address sender, address recipient, uint amount) external returns (bool);
13 | event Transfer(address indexed from, address indexed to, uint value);
14 | event Approval(address indexed owner, address indexed spender, uint value);
15 | }
16 |
17 | interface IWEth is IERC20 {
18 | function withdraw(uint wad) external;
19 | function deposit() external payable;
20 | }
21 |
22 | interface IAave {
23 | function deposit(address asset,uint amount,address onBehalfOf,uint16 referralCode) external;
24 | function borrow(address asset,uint amount,uint interestRateMode,uint16 referralCode,address onBehalfOf) external;
25 | function repay(address asset,uint amount,uint rateMode,address onBehalfOf) external returns (uint);
26 | function withdraw(address asset,uint amount,address to) external returns (uint);
27 | function getUserAccountData(address user) external view returns (uint totalCollateralETH, uint totalDebtETH, uint availableBorrowsETH, uint currentLiquidationThreshold, uint ltv, uint healthFactor);
28 | }
29 |
30 | contract InterfaceExample {
31 | address private wethAddress = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
32 | address private aaveAddress = 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9;
33 |
34 | function depositWeth() external {
35 | uint wethBalance = IWEth(wethAddress).balanceOf(address(this));
36 | IAave(aaveAddress).deposit(wethAddress,wethBalance,address(this),0);
37 | }
38 | }
--------------------------------------------------------------------------------
/contracts/IsContract.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract IsContract {
5 |
6 | function isContract(address account) private view returns (bool) {
7 | uint256 size;
8 | assembly {
9 | size := extcodesize(account)
10 | }
11 | return size > 0;
12 | }
13 | }
14 |
--------------------------------------------------------------------------------
/contracts/LayerZeroOFT.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.18;
3 |
4 | /*
5 | // https://layerzero.gitbook.io/docs/technical-reference/testnet/testnet-addresses
6 | Goerli lzEndpointAddress = 0xbfD2135BFfbb0B5378b56643c2Df8a87552Bfa23
7 | chainId: 10121 deploymentAddress =
8 | Optimism-Goerli lzEndpointAddress = 0xae92d5aD7583AD66E49A0c67BAd18F6ba52dDDc1
9 | chainId: 10132 deploymentAddress =
10 | */
11 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
12 | import "https://github.com/LayerZero-Labs/solidity-examples/blob/main/contracts/token/oft/OFTCore.sol";
13 | import "https://github.com/LayerZero-Labs/solidity-examples/blob/main/contracts/token/oft/IOFT.sol";
14 |
15 | contract LayerZeroOFT is OFTCore, ERC20, IOFT {
16 | address constant lzEndpointAddress = 0xbfD2135BFfbb0B5378b56643c2Df8a87552Bfa23;
17 |
18 | constructor() ERC20("LayerZeroOFT", "LZOFT") OFTCore(lzEndpointAddress) {
19 | if (block.chainid == 5) { // Only mint initial supply on Goerli
20 | _mint(msg.sender, 1_000_000 * 10 ** decimals());
21 | }
22 | }
23 |
24 | function supportsInterface(bytes4 interfaceId) public view virtual override(OFTCore, IERC165) returns (bool) {
25 | return interfaceId == type(IOFT).interfaceId || interfaceId == type(IERC20).interfaceId || super.supportsInterface(interfaceId);
26 | }
27 |
28 | function token() public view virtual override returns (address) {
29 | return address(this);
30 | }
31 |
32 | function circulatingSupply() public view virtual override returns (uint) {
33 | return totalSupply();
34 | }
35 |
36 | function _debitFrom(address _from, uint16, bytes memory, uint _amount) internal virtual override returns(uint) {
37 | address spender = _msgSender();
38 | if (_from != spender) _spendAllowance(_from, spender, _amount);
39 | _burn(_from, _amount);
40 | return _amount;
41 | }
42 |
43 | function _creditTo(uint16, address _toAddress, uint _amount) internal virtual override returns(uint) {
44 | _mint(_toAddress, _amount);
45 | return _amount;
46 | }
47 | }
--------------------------------------------------------------------------------
/contracts/Library.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | library TestLibrary {
5 | function subtract(uint a, uint b) internal pure returns (uint) {
6 | return a - b;
7 | }
8 | }
9 |
10 | // import "./TestLibrary.sol";
11 |
12 | contract MyContract {
13 | function func(uint a, uint b) public pure returns (uint) {
14 | return TestLibrary.subtract(a, b);
15 | }
16 | }
17 |
--------------------------------------------------------------------------------
/contracts/Loops.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.21;
3 |
4 | contract Loops {
5 | uint[20] public values;
6 |
7 | function replaceValue(uint _breakPoint) public {
8 | for (uint i = 0; i < values.length; i++) {
9 | if (i == 5) {
10 | continue; // skip to next i
11 | } else if (i >= _breakPoint) {
12 | break; // break out of loop
13 | } else {
14 | values[i] = i;
15 | }
16 | }
17 | }
18 |
19 | function automate() external {
20 | uint x = 10;
21 | while (values[12] == 0) {
22 | replaceValue(x);
23 | x ++;
24 | }
25 | }
26 |
27 | function uglyAutomate() external {
28 | uint x = 10;
29 | do {
30 | replaceValue(x);
31 | x ++;
32 | } while (values[12] == 0);
33 | }
34 |
35 | }
--------------------------------------------------------------------------------
/contracts/Mapping.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | // Mapping Addresses To Balances
5 | contract AddressMap {
6 | mapping(address => uint) public balances;
7 |
8 | function addFunds() public {
9 | balances[msg.sender] = 1000;
10 | }
11 |
12 | function checkFunds(address _addr) public view returns(uint) {
13 | return balances[_addr];
14 | }
15 | }
16 |
--------------------------------------------------------------------------------
/contracts/MaxUint256.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract MaxUint256 {
5 | function uintMax() external pure returns(uint256) {
6 | return type(uint256).max;
7 | }
8 | }
9 |
--------------------------------------------------------------------------------
/contracts/Merkle.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | // https://github.com/dragonfly-xyz/useful-solidity-patterns/
5 |
6 | contract Merkle {
7 | bytes32 public immutable MerkleRoot;
8 | mapping (address => bool) public hasClaimed;
9 |
10 | constructor(bytes32 _root) payable {
11 | MerkleRoot = _root;
12 | }
13 |
14 | function prove(bytes32 leaf, bytes32[] memory _siblings) public view returns (bool) {
15 | require(leaf != 0, 'invalid leaf value');
16 | bytes32 node = leaf;
17 | for (uint i = 0; i < _siblings.length; ++i) {
18 | bytes32 sibling = _siblings[i];
19 | node = keccak256(node > sibling ? abi.encode(sibling, node) : abi.encode(node, sibling));
20 | }
21 | return node == MerkleRoot;
22 | }
23 |
24 | function claim(address payable member, uint _claimAmount, bytes32[] memory _proof) external {
25 | require(prove(~keccak256(abi.encode(member, _claimAmount)), _proof), 'bad proof');
26 | hasClaimed[member] = true;
27 | member.transfer(_claimAmount);
28 | }
29 | }
30 |
31 | contract MerkleHelper {
32 | function constructTree(address[] memory _members, uint[] memory _claimAmounts) external pure returns (bytes32 root, bytes32[][] memory tree) {
33 | require(_members.length != 0 && _members.length == _claimAmounts.length);
34 | uint height = 0;
35 | {
36 | uint n = _members.length;
37 | while (n != 0) {
38 | n = n == 1 ? 0 : (n + 1) / 2;
39 | ++height;
40 | }
41 | }
42 | tree = new bytes32[][](height);
43 | bytes32[] memory nodes = tree[0] = new bytes32[](_members.length);
44 | for (uint i = 0; i < _members.length; ++i) {
45 | nodes[i] = ~keccak256(abi.encode(_members[i], _claimAmounts[i]));
46 | }
47 | for (uint h = 1; h < height; ++h) {
48 | uint nHashes = (nodes.length + 1) / 2;
49 | bytes32[] memory hashes = new bytes32[](nHashes);
50 | for (uint i = 0; i < nodes.length; i += 2) {
51 | bytes32 a = nodes[i];
52 | bytes32 b = i + 1 < nodes.length ? nodes[i + 1] : bytes32(0);
53 | hashes[i / 2] = keccak256(a > b ? abi.encode(b, a) : abi.encode(a, b));
54 | }
55 | tree[h] = nodes = hashes;
56 | }
57 | root = tree[height - 1][0];
58 | }
59 |
60 | function createProof(uint _memberIndex, bytes32[][] memory _tree) external pure returns (bytes32[] memory _proof) {
61 | uint leafIndex = _memberIndex;
62 | uint height = _tree.length;
63 | _proof = new bytes32[](height - 1);
64 | for (uint h = 0; h < _proof.length; ++h) {
65 | uint siblingIndex = leafIndex % 2 == 0 ? leafIndex + 1 : leafIndex - 1;
66 | if (siblingIndex < _tree[h].length) {
67 | _proof[h] = _tree[h][siblingIndex];
68 | }
69 | leafIndex /= 2;
70 | }
71 | }
72 | }
73 |
--------------------------------------------------------------------------------
/contracts/Modifier.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract Modifier {
5 | modifier onlyVitalik() {
6 | require(msg.sender == 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045);
7 | _;
8 | }
9 |
10 | function doSomething() external onlyVitalik {
11 | // Only vitalik's wallet can call this function
12 | }
13 | }
--------------------------------------------------------------------------------
/contracts/MultipleReturns.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract MultipleReturns {
5 | function returnVars() internal pure returns(uint,uint,uint) {
6 | uint var1 = 1;
7 | uint var2 = 2;
8 | uint var3 = 3;
9 | return (var1,var2,var3);
10 | }
11 |
12 | function getVar() external pure returns(uint) {
13 | // (uint a, uint b, uint c) = returnVars();
14 | (,uint b,) = returnVars();
15 | return b;
16 | }
17 | }
--------------------------------------------------------------------------------
/contracts/NatspecComments.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.21;
3 |
4 | /**
5 | * @title Example Comment Contract
6 | * @author James Bachini
7 | * @notice notes for normies, code with ASCII cat art is better
8 | * @dev Notes for devs, https://ascii-generator.site/t/
9 | * @custom:experimental This is an experimental contract.
10 | * |\__/,| (`
11 | * __|o o |___ )
12 | * -(((---(((--------
13 | */
14 |
15 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
16 | import "@openzeppelin/contracts/access/Ownable.sol";
17 |
18 | contract Comments is ERC20, Ownable {
19 |
20 | /**
21 | * @dev Constructor method initializes the ERC20 Token.
22 | */
23 | constructor() ERC20("Commment Token", "CT") Ownable(msg.sender) {}
24 |
25 | /**
26 | * @notice Mints new tokens
27 | * @dev This can only be called by the owner (contract deployer)
28 | * @param {address} _to The address to send newly minted partner tokens to
29 | * @param {uint} _amount The number of tokens to mint
30 | * @return {uint} always returns 1337
31 | */
32 | function mint(address _to, uint _amount) public onlyOwner returns (uint) {
33 | _mint(_to, _amount); // internal ERC20 function mints new tokens
34 | return 1337;
35 | }
36 |
37 | /**
38 | * @notice custom after transfer fuction
39 | * @dev overrides ERC20 internal function
40 | * @inheritdoc ERC20
41 | */
42 | function _update(address, address _to, uint256 _amount) internal override {
43 | // nothing to see here
44 | }
45 | }
46 |
--------------------------------------------------------------------------------
/contracts/Oracle.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | interface EACAggregatorProxy {
5 | function latestAnswer() external view returns (int256);
6 | }
7 |
8 | // Get ETH price from Chainlink oracle service
9 | contract PainLink {
10 | int256 public ethPrice = 0;
11 | address public chainLinkETHUSDAddress = 0x9326BFA02ADD2366b30bacB125260Af641031331; // Kovan, more addresses here: https://docs.chain.link/docs/reference-contracts/
12 | function updateEthPrice() public returns (int256) {
13 | ethPrice = EACAggregatorProxy(chainLinkETHUSD).latestAnswer();
14 | }
15 | }
16 |
--------------------------------------------------------------------------------
/contracts/Override.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 |
6 | contract MyToken is ERC20 {
7 | bool paused = true;
8 |
9 | constructor() ERC20("My Paused Token", "TOKEN") {
10 | _mint(msg.sender, 1000000);
11 | }
12 |
13 | function letsGo() external {
14 | paused = false;
15 | }
16 |
17 | function _beforeTokenTransfer(address from, address to, uint amount) internal virtual override(ERC20) {
18 | super._beforeTokenTransfer(from, to, amount);
19 | require(paused == false, "Token transfer is paused");
20 | }
21 | }
--------------------------------------------------------------------------------
/contracts/Ownable.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/access/Ownable.sol";
5 |
6 | contract OwnableExample1 is Ownable(msg.sender) {
7 | function adminFunctionExample() public onlyOwner {
8 | // Avoid Decentralisation Here
9 | }
10 | }
11 |
12 | // Ownable Contracts Using Modifier
13 | contract OwnableExample2 {
14 | address public owner;
15 |
16 | constructor() {
17 | owner = msg.sender;
18 | }
19 |
20 | modifier onlyOwner() {
21 | require(msg.sender == owner, "not owner");
22 | _;
23 | }
24 |
25 | function setOwner(address _newOwner) public onlyOwner {
26 | owner = _newOwner;
27 | }
28 |
29 | function adminFunctionExample() public onlyOwner {
30 | // Avoid Decentralisation Here
31 | }
32 | }
33 |
--------------------------------------------------------------------------------
/contracts/PassFunction.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract PassFunction {
5 | uint public n;
6 |
7 | function exec(uint _a) internal pure returns (uint) {
8 | return _a * 2;
9 | }
10 |
11 | function run(function(uint) internal returns (uint) _func, uint _x) internal {
12 | n = _func(_x);
13 | }
14 |
15 | function test() external {
16 | run(exec,8);
17 | }
18 |
19 | }
--------------------------------------------------------------------------------
/contracts/PaymentDivider.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.17;
3 |
4 | contract Distributor {
5 | address developer = 0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2;
6 | address lawfirm = 0x4B20993Bc481177ec7E8f571ceCaE8A9e22C02db;
7 | address bizdev = 0x78731D3Ca6b7E34aC0F824c42a7cC18A495cabaB;
8 |
9 | fallback() external payable {
10 | uint developerAmount = msg.value * 90 / 100;
11 | uint lawfirmAmount = msg.value * 5 / 100;
12 | uint bizdevAmount = msg.value - developerAmount - lawfirmAmount;
13 |
14 | payable(developer).transfer(developerAmount);
15 | payable(lawfirm).transfer(lawfirmAmount);
16 | payable(bizdev).transfer(bizdevAmount);
17 | }
18 | }
19 |
--------------------------------------------------------------------------------
/contracts/Pen.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.23;
3 |
4 | /* ____ __ _ __ ___ ______ _ ___ _
5 | * / __/__ / / / / |/ /__ /_ __/ / ( )__ / _ \___ __ | |
6 | * _\ \/ -_/ / / / /|_/ / -_/ / / / \/ ( _/ / ___/ -_) \ / \
7 | * /___/\__/_/_/ /_/ /_/\__/ /_/ /_/_/_/__/ /_/ \__/_/_/ \|/
8 | *
9 | * Etch your words permanently on the Ethereum blockchain where they will outlive
10 | * you & create an everlasting record of your thoughts, contemplations & predictions.
11 | * This is your chance to leave an eternal mark and express your presence in the
12 | * digital age while being rewarded with a "Write to Earn" token.
13 | *
14 | * Deployed to Ethereum: 0x7eae7422f633429EE72BA991Ac293197B80D5976
15 | */
16 |
17 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
18 |
19 | contract Pen is ERC20 {
20 | uint maxSupply = 1_000_000 * 10 ** decimals();
21 | uint reward = 1_000 * 10 ** decimals();
22 | mapping(address => string) public paper;
23 | mapping(address => bool) public rewarded;
24 | event LogThis(string msg);
25 |
26 | constructor() ERC20("Pen", "PEN") {}
27 |
28 | function write(string memory _msg) public {
29 | paper[msg.sender] = _msg;
30 | emit LogThis(_msg);
31 | distributeRewards();
32 | }
33 |
34 | function read(address _writer) public view returns (string memory) {
35 | return paper[_writer];
36 | }
37 |
38 | function distributeRewards() internal {
39 | if (totalSupply() + reward < maxSupply && rewarded[msg.sender] == false) {
40 | rewarded[msg.sender] = true;
41 | _mint(msg.sender, reward);
42 | }
43 | }
44 | }
--------------------------------------------------------------------------------
/contracts/Random.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.18;
3 |
4 | // Generate a random enough number for most applications
5 | contract RandomishNumbers {
6 |
7 | function newRandom() private view returns (uint) {
8 | uint randomNumber = block.prevrandao;
9 | return randomNumber;
10 | }
11 |
12 | function oldRandom() private view returns (uint) {
13 | uint hashNumber = uint(keccak256(abi.encodePacked(block.difficulty, block.timestamp, msg.sender)));
14 | return hashNumber % 100;
15 | }
16 | }
17 |
18 | // For more secure randomness consider an off-chain oracle service such as https://docs.chain.link/docs/chainlink-vrf/
19 |
--------------------------------------------------------------------------------
/contracts/Rewards.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 |
6 | // Send out ERC20 Rewards
7 | contract Rewards {
8 | address rewardToken = 0xd0A1E359811322d97991E03f863a0C30C2cF029C; // Kovan WETH
9 |
10 | mapping(address => uint) public startTS;
11 |
12 | uint public deployedTS;
13 | uint rewardsPerDay = 1e18; // wei, 18 decimals
14 |
15 | constructor() {
16 | deployedTS = block.timestamp;
17 | }
18 |
19 | function addMe() public {
20 | // logic to decide who deserves rewards
21 | startTS[msg.sender] = block.timestamp;
22 | }
23 |
24 | function claimRewards() public {
25 | require(startTS[msg.sender] != 0, "No record of user account");
26 | require(startTS[msg.sender] < block.timestamp - 1 days, "No Rewards Due On First Day");
27 | uint rewardAmount = block.timestamp - startTS[msg.sender] * rewardsPerDay / 1 days;
28 | startTS[msg.sender] = block.timestamp;
29 | IERC20(rewardToken).transfer(msg.sender, rewardAmount);
30 | }
31 | }
32 |
--------------------------------------------------------------------------------
/contracts/Shares.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.21;
3 |
4 | /**
5 | * A simplified permissionless version of FriendtechSharesV1 contract
6 | */
7 |
8 | contract Shares {
9 | address public protocolFeeDestination;
10 | uint256 public protocolFeePercent;
11 |
12 | constructor() {
13 | protocolFeeDestination = msg.sender;
14 | protocolFeePercent = 1e15;
15 | }
16 |
17 | event Trade(address trader, address subject, bool isBuy, uint256 shareAmount, uint256 ethAmount, uint256 protocolEthAmount, uint256 supply);
18 |
19 | mapping(address => mapping(address => uint256)) public sharesBalance;
20 | mapping(address => uint256) public sharesSupply;
21 |
22 | function getPrice(uint256 supply, uint256 amount) public pure returns (uint256) {
23 | uint256 sum1 = supply == 0 ? 0 : (supply - 1 )* (supply) * (2 * (supply - 1) + 1) / 6;
24 | uint256 sum2 = supply == 0 && amount == 1 ? 0 : (supply - 1 + amount) * (supply + amount) * (2 * (supply - 1 + amount) + 1) / 6;
25 | uint256 summation = sum2 - sum1;
26 | return summation * 1 ether / 16000;
27 | }
28 |
29 | function getBuyPrice(address sharesSubject, uint256 amount) public view returns (uint256) {
30 | return getPrice(sharesSupply[sharesSubject], amount);
31 | }
32 |
33 | function getSellPrice(address sharesSubject, uint256 amount) public view returns (uint256) {
34 | return getPrice(sharesSupply[sharesSubject] - amount, amount);
35 | }
36 |
37 | function getBuyPriceAfterFee(address sharesSubject, uint256 amount) public view returns (uint256) {
38 | uint256 price = getBuyPrice(sharesSubject, amount);
39 | uint256 protocolFee = price * protocolFeePercent / 1 ether;
40 | return price + protocolFee;
41 | }
42 |
43 | function getSellPriceAfterFee(address sharesSubject, uint256 amount) public view returns (uint256) {
44 | uint256 price = getSellPrice(sharesSubject, amount);
45 | uint256 protocolFee = price * protocolFeePercent / 1 ether;
46 | return price - protocolFee;
47 | }
48 |
49 | function buyShares(address sharesSubject, uint256 amount) public payable {
50 | uint256 supply = sharesSupply[sharesSubject];
51 | require(supply > 0 || sharesSubject == msg.sender, "Only the shares' subject can buy the first share");
52 | uint256 price = getPrice(supply, amount);
53 | uint256 protocolFee = price * protocolFeePercent / 1 ether;
54 | require(msg.value >= price + protocolFee, "Insufficient payment");
55 | sharesBalance[sharesSubject][msg.sender] = sharesBalance[sharesSubject][msg.sender] + amount;
56 | sharesSupply[sharesSubject] = supply + amount;
57 | emit Trade(msg.sender, sharesSubject, true, amount, price, protocolFee, supply + amount);
58 | (bool success1, ) = protocolFeeDestination.call{value: protocolFee}("");
59 | require(success1, "Unable to send funds");
60 | }
61 |
62 | function sellShares(address sharesSubject, uint256 amount) public payable {
63 | uint256 supply = sharesSupply[sharesSubject];
64 | require(supply > amount, "Cannot sell the last share");
65 | uint256 price = getPrice(supply - amount, amount);
66 | uint256 protocolFee = price * protocolFeePercent / 1 ether;
67 | require(sharesBalance[sharesSubject][msg.sender] >= amount, "Insufficient shares");
68 | sharesBalance[sharesSubject][msg.sender] = sharesBalance[sharesSubject][msg.sender] - amount;
69 | sharesSupply[sharesSubject] = supply - amount;
70 | emit Trade(msg.sender, sharesSubject, false, amount, price, protocolFee, supply - amount);
71 | (bool success1, ) = msg.sender.call{value: price - protocolFee}("");
72 | (bool success2, ) = protocolFeeDestination.call{value: protocolFee}("");
73 | require(success1 && success2, "Unable to send funds");
74 | }
75 | }
--------------------------------------------------------------------------------
/contracts/Shuffle.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.19;
3 |
4 | contract Shuffle {
5 | struct Card {
6 | uint8 suit; // 1-4
7 | uint8 rank; // 1-13
8 | }
9 |
10 | Card[] public deck;
11 |
12 | constructor() {
13 | // Create a deck of cards
14 | for (uint8 suit = 1; suit <= 4; suit++) {
15 | for (uint8 rank = 1; rank <= 13; rank++) {
16 | deck.push(Card(suit, rank));
17 | }
18 | }
19 | }
20 |
21 | function shuffle() public {
22 | uint256 deckSize = deck.length;
23 | for (uint256 i = 0; i < deckSize; i++) {
24 | uint256 j = uint256(keccak256(abi.encode(block.prevrandao, i))) % deckSize;
25 | Card memory tmpCard = deck[i];
26 | deck[i] = deck[j];
27 | deck[j] = tmpCard;
28 | }
29 | }
30 | }
--------------------------------------------------------------------------------
/contracts/StaggeredSale.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.21;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 | import "@openzeppelin/contracts/access/Ownable.sol";
6 |
7 | contract StaggeredSale is ERC20, Ownable {
8 | uint public immutable deployedTimestamp;
9 | uint private immutable mintLimit = 90_000_000 * 10 ** decimals();
10 | uint public saleMinted;
11 | uint public startDate;
12 | uint public endDate;
13 | uint startPricePerToken = 0.0001 ether;
14 | uint endPricePerToken = 0.00013 ether;
15 | bool tokenLive;
16 | event PublicSale(address to, uint amountReceived, uint ethContributed);
17 |
18 | constructor() ERC20("Staggered Sale Token", "SST") Ownable(msg.sender) {
19 | deployedTimestamp = block.timestamp;
20 | startDate = deployedTimestamp + 7 days;
21 | endDate = deployedTimestamp + 37 days;
22 | tokenLive = true;
23 | // mint team tokens
24 | _mint(msg.sender, 10_000_000 * 10 ** decimals());
25 | tokenLive = false;
26 | }
27 |
28 | function pricePerDay(uint _day) public view returns (uint) {
29 | uint startDay = 0;
30 | uint endDay = (endDate - startDate) / 1 days;
31 | uint timeProgress = _day - startDay;
32 | uint totalDuration = endDay - startDay;
33 | uint priceProgress = ((endPricePerToken - startPricePerToken) * timeProgress) / totalDuration;
34 | uint currentPrice = startPricePerToken + priceProgress;
35 | return currentPrice;
36 | }
37 |
38 | function nextPriceUpdate() public view returns (uint, uint) {
39 | uint daysPassed = (block.timestamp - startDate) / 1 days;
40 | uint nextUpdateTS = startDate + ((daysPassed + 1) * 1 days);
41 | uint secondsLeft = nextUpdateTS - block.timestamp;
42 | uint nextPrice = pricePerDay(daysPassed + 1);
43 | return (secondsLeft, nextPrice);
44 | }
45 |
46 | function staggeredPublicSalePrice() public view returns (uint) {
47 | uint daysPassed = (block.timestamp - startDate) / 1 days;
48 | uint currentPrice = pricePerDay(daysPassed);
49 | return currentPrice;
50 | }
51 |
52 | // function not used but if you want to do a linear price increase this is how
53 | function linearPublicSalePrice() public view returns (uint) {
54 | uint timeProgress = block.timestamp - startDate;
55 | uint totalDuration = endDate - startDate;
56 | uint priceProgress = ((endPricePerToken - startPricePerToken) * timeProgress) / totalDuration;
57 | uint currentPrice = startPricePerToken + priceProgress;
58 | return currentPrice;
59 | }
60 |
61 | function buyTokens() external payable {
62 | require(block.timestamp > startDate, "too soon");
63 | require(block.timestamp < endDate, "too late");
64 | require(msg.value > 0.00001 ether, "min amount in not met");
65 | uint _price = staggeredPublicSalePrice();
66 | uint _amount = msg.value / _price * 10 ** decimals();
67 | require(_amount > 0, "min amount out not met");
68 | require(saleMinted + _amount < mintLimit, "sold out");
69 | saleMinted += _amount;
70 | payable(owner()).transfer(msg.value);
71 | tokenLive = true;
72 | _mint(msg.sender, _amount);
73 | tokenLive = false;
74 | emit PublicSale(msg.sender, _amount, msg.value);
75 | }
76 |
77 | function goLive() external onlyOwner {
78 | require(block.timestamp > endDate, "too soon");
79 | tokenLive = true;
80 | uint unsoldTokens = mintLimit - saleMinted;
81 | saleMinted += unsoldTokens;
82 | if (unsoldTokens > 0)
83 | _mint(owner(), unsoldTokens);
84 | }
85 |
86 | function _update(address from, address to, uint256 amount) internal override {
87 | require(tokenLive == true, "Token transfers not enabled yet");
88 | super._update(from, to, amount);
89 | }
90 | }
--------------------------------------------------------------------------------
/contracts/Structs.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | // Struct Structure Example
5 | contract Structural {
6 | struct Newb {
7 | string name;
8 | uint age;
9 | address addy;
10 | }
11 | Newb[] public newbies; // an array
12 |
13 | mapping (address => Newb) public newbs; // a mapping
14 |
15 | function addMe public () {
16 | newbies.push(Newb('James',21,msg.sender));
17 | }
18 |
19 | function whatsMyAgeAgain public view returns(uint) {
20 | return newbies[0].age;
21 | }
22 |
23 | function remove(uint _i) public {
24 | delete newbies[_i];
25 | }
26 | }
27 |
--------------------------------------------------------------------------------
/contracts/TernaryOperators.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.21;
3 |
4 | contract TernaryOperators {
5 |
6 | function lowerValue(uint _a, uint _b) public pure returns (uint) {
7 | // (query ? true : false)
8 | uint value = (_a < _b ? _a : _b);
9 | return value;
10 | }
11 |
12 | }
--------------------------------------------------------------------------------
/contracts/TransparentProxy.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.0;
3 |
4 | import "@openzeppelin/contracts/proxy/transparent/ProxyAdmin.sol";
5 | import "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
6 |
7 | contract ProxyDeployer {
8 | address public admin;
9 | address public proxy;
10 | constructor(address _implementation) {
11 | ProxyAdmin adminInstance = new ProxyAdmin(msg.sender);
12 | admin = address(adminInstance);
13 | TransparentUpgradeableProxy proxyInstance = new TransparentUpgradeableProxy(_implementation, admin, "");
14 | proxy = address(proxyInstance);
15 | }
16 | }
--------------------------------------------------------------------------------
/contracts/UintToString.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.17;
3 |
4 | contract UintToString {
5 |
6 | function uint2string(uint _i) internal pure returns (string memory str) {
7 | if (_i == 0) return "0";
8 | uint j = _i;
9 | uint length;
10 | while (j != 0) {
11 | length++;
12 | j /= 10;
13 | }
14 | bytes memory bstr = new bytes(length);
15 | uint k = length;
16 | j = _i;
17 | while (j != 0) {
18 | bstr[--k] = bytes1(uint8(48 + j % 10));
19 | j /= 10;
20 | }
21 | str = string(bstr);
22 | }
23 |
24 | function tokenURI(uint _tokenId) public pure returns (string memory) {
25 | return string.concat("https://jamesbachini.com/", uint2string(_tokenId), ".json");
26 | }
27 |
28 | }
--------------------------------------------------------------------------------
/contracts/Uniswap.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 | import '@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol';
6 |
7 | contract SwapTokens {
8 | address public _uinswapV3RouterAddress = 0xE592427A0AEce92De3Edee1F18E0157C05861564;
9 | address private _daiAddress = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
10 | address private _wethAddress = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
11 |
12 | function buyWeth(uint amountUSD) internal {
13 | uint256 deadline = block.timestamp + 15;
14 | uint24 fee = 3000;
15 | address recipient = address(this);
16 | uint256 amountIn = amountUSD; // includes 18 decimals
17 | uint256 amountOutMinimum = 0;
18 | uint160 sqrtPriceLimitX96 = 0;
19 | require(IERC20(_daiAddress).approve(address(_uinswapV3RouterAddress), amountIn), 'DAI approve failed');
20 |
21 | ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams(
22 | _daiAddress,
23 | _wethAddress,
24 | fee,
25 | recipient,
26 | deadline,
27 | amountIn,
28 | amountOutMinimum,
29 | sqrtPriceLimitX96
30 | );
31 | ISwapRouter(_uinswapV3RouterAddress).exactInputSingle(params);
32 | }
33 | }
--------------------------------------------------------------------------------
/contracts/UniswapFlashLoan.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.18;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
5 |
6 | interface IPool {
7 | function flash(address recipient, uint amount0, uint amount1, bytes calldata data) external;
8 | function token0() external view returns (address);
9 | function token1() external view returns (address);
10 | }
11 |
12 | interface IFactory {
13 | function getPool(address token0, address token1, uint24 fee) external view returns (address);
14 | }
15 |
16 | contract UniswapFlashLoan {
17 | address public pool;
18 | address public factory;
19 | address public token0;
20 | address public token1;
21 | uint public balanceCheck0;
22 | uint public balanceCheck1;
23 |
24 | constructor(address _token0, address _token1, uint24 _fee) {
25 | // 0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6, 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984, 3000
26 | factory = 0x1F98431c8aD98523631AE4a59f267346ea31F984; // Uniswap V3 Factory Contract
27 | pool = IFactory(factory).getPool(_token0, _token1, _fee);
28 | token0 = IPool(pool).token0(); // note they get swapped around
29 | token1 = IPool(pool).token1();
30 | }
31 |
32 | function flashLoan(uint _token0Amount, uint _token1Amount) external {
33 | bytes memory data = abi.encode(_token0Amount, _token1Amount, msg.sender);
34 | IPool(pool).flash(address(this), _token0Amount, _token1Amount, data);
35 | }
36 |
37 | function uniswapV3FlashCallback(uint _fee0, uint _fee1, bytes calldata _data) external {
38 | require(msg.sender == address(pool), "Only Callback");
39 | (uint token0Amount, uint token1Amount, address msgSender) = abi.decode(_data, (uint, uint, address));
40 | // do something to generate enough to payback the loan and fee
41 | balanceCheck0 = IERC20(token0).balanceOf(address(this));
42 | balanceCheck1 = IERC20(token1).balanceOf(address(this));
43 | if (_fee0 > 0) IERC20(token0).transfer(address(pool), token0Amount + _fee0);
44 | if (_fee1 > 0) IERC20(token1).transfer(address(pool), token1Amount + _fee1);
45 | }
46 | }
47 |
--------------------------------------------------------------------------------
/contracts/VCTerms.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | /*
5 | A contract designed for vested tokens with a flexible
6 | lockup and linear distribution period
7 | */
8 |
9 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
10 |
11 | contract VCTerms {
12 | address public owner;
13 | mapping(address => uint) public contributed;
14 | mapping(address => uint) public claimed;
15 | uint public priceMultiplier = 100; // 100 tokens per ETH
16 | uint public cliffPeriodEnds;
17 |
18 | event Contribution(address user, uint amount);
19 | event Claim(address user, uint amount);
20 |
21 | constructor() {
22 | owner = msg.sender;
23 | cliffPeriodEnds = 1767139200; // End 2025 Unix Timestamp
24 | }
25 |
26 | function contribute() external payable {
27 | require(msg.value > 0, "Send some Eth");
28 | contributed[msg.sender] += msg.value;
29 | emit Contribution(msg.sender, msg.value);
30 | }
31 |
32 | function checkClaim(address _user) public view returns (uint) {
33 | if (block.timestamp < cliffPeriodEnds) return 0;
34 | uint totalOwed = contributed[_user] * priceMultiplier;
35 | uint vestingPeriod = 156 weeks;
36 | uint secondsPassed = block.timestamp - cliffPeriodEnds;
37 | if (secondsPassed > vestingPeriod) secondsPassed = vestingPeriod;
38 | uint unlocked = totalOwed * secondsPassed / vestingPeriod;
39 | uint amountToClaim = unlocked - claimed[msg.sender];
40 | return amountToClaim;
41 | }
42 |
43 | function claim(address _token) external returns (uint) {
44 | uint amountAvailable = checkClaim(msg.sender);
45 | require(amountAvailable > 0, "Nothing to claim");
46 | claimed[msg.sender] += amountAvailable;
47 | IERC20(_token).transfer(msg.sender,amountAvailable);
48 | emit Claim(msg.sender, amountAvailable);
49 | return amountAvailable;
50 | }
51 |
52 | function claimToken(address _token) external {
53 | require(msg.sender == owner, "only owner has access");
54 | uint balance = IERC20(_token).balanceOf(address(this));
55 | IERC20(_token).transfer(msg.sender, balance);
56 | }
57 |
58 | function claimETH() external {
59 | require(msg.sender == owner, "only owner has access");
60 | payable(msg.sender).transfer(address(this).balance);
61 | }
62 |
63 | }
--------------------------------------------------------------------------------
/contracts/Variables.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | contract Variables {
5 | uint256 public myUint;
6 | int256 public myInt;
7 | bool public myBool;
8 | address public myAddress;
9 | bytes32 public myBytes32;
10 | string public myString;
11 | uint256[] public myArray;
12 |
13 | enum State { INACTIVE, ACTIVE }
14 | State public myState = State.INACTIVE;
15 |
16 | struct Person {
17 | string username;
18 | uint256 age;
19 | }
20 | Person public myPerson;
21 |
22 | constructor() {
23 | myUint = 123;
24 | myInt = -456;
25 | myBool = true;
26 | myAddress = msg.sender;
27 | myBytes32 = 0x0;
28 | myString = "Hello, world!";
29 | myArray = [1, 2, 3, 4, 5];
30 | myPerson = Person("Alice", 30);
31 | }
32 |
33 | function setUint(uint256 _newValue) public {
34 | myUint = _newValue;
35 | }
36 |
37 | function setPerson(string memory _username, uint256 _age) public {
38 | myPerson = Person(_username, _age);
39 | }
40 |
41 | function addToArray(uint256 _newValue) public {
42 | myArray.push(_newValue);
43 | }
44 | }
--------------------------------------------------------------------------------
/contracts/Vault.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.0;
3 |
4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
5 | import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
6 |
7 | contract Vault is ERC20 {
8 | IERC20 public immutable token;
9 |
10 | constructor(address _token) ERC20("Vault Receipt Token", "RECEIPT") {
11 | token = IERC20(_token);
12 | }
13 |
14 | function deposit(uint _amount) external {
15 | uint receiptTokens;
16 | if (totalSupply() == 0) {
17 | receiptTokens = _amount;
18 | } else {
19 | receiptTokens = (_amount * totalSupply()) / token.balanceOf(address(this));
20 | }
21 | _mint(msg.sender, receiptTokens);
22 | token.transferFrom(msg.sender, address(this), _amount);
23 | }
24 |
25 | function withdraw(uint _receiptTokens) external {
26 | uint amount = (_receiptTokens * token.balanceOf(address(this))) / totalSupply();
27 | _burn(msg.sender, _receiptTokens);
28 | token.transfer(msg.sender, amount);
29 | }
30 | }
31 |
--------------------------------------------------------------------------------
/contracts/Whitelist.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.17;
3 |
4 | import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
5 |
6 | contract Whitelist {
7 | address public test;
8 | bytes32 public merkleRoot;
9 |
10 | constructor(bytes32 _merkleRoot) {
11 | merkleRoot = _merkleRoot;
12 | }
13 |
14 | function claim(bytes32[] memory _proof, address _account) public {
15 | bytes32 leaf = keccak256(abi.encodePacked(_account));
16 | require(MerkleProof.verify(_proof, merkleRoot, leaf), "Invalid proof");
17 | test = _account; // whitelisted addresses can access this logic
18 | }
19 | }
--------------------------------------------------------------------------------
/contracts/encodeCall.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity >=0.8.11;
3 |
4 | interface IERC20 {
5 | function transfer(address recipient, uint amount) external returns (bool);
6 | }
7 |
8 | contract encodeCall {
9 | function encodeCallData(address _to, uint _value) public pure returns (bytes memory) {
10 | return abi.encodeCall(IERC20.transfer, (_to, _value));
11 | }
12 | }
--------------------------------------------------------------------------------
/contracts/escrow.sol:
--------------------------------------------------------------------------------
1 | // SPDX-License-Identifier: MIT
2 | pragma solidity ^0.8.24;
3 |
4 | contract Escrow {
5 |
6 | struct Agreement {
7 | address bob;
8 | address alice;
9 | address arbitrator;
10 | uint amount;
11 | bool bobIn;
12 | bool aliceIn;
13 | }
14 |
15 | Agreement[] public agreements;
16 |
17 | function newAgreement(address _bob, address _alice, uint _amount) external returns (uint) {
18 | require(_bob != _alice, "same buyer and seller");
19 | agreements.push(Agreement(_bob,_alice,msg.sender,_amount,false,false));
20 | return agreements.length - 1;
21 | }
22 |
23 | function deposit(uint _id) external payable {
24 | if (msg.sender == agreements[_id].bob && msg.value == agreements[_id].amount) {
25 | agreements[_id].bobIn = true;
26 | }
27 | else if (msg.sender == agreements[_id].alice && msg.value == agreements[_id].amount) {
28 | agreements[_id].aliceIn = true;
29 | }
30 | }
31 |
32 | function refund(uint _id) external {
33 | if (msg.sender == agreements[_id].bob && agreements[_id].bobIn == true) {
34 | agreements[_id].bobIn = false;
35 | payable(agreements[_id].bob).transfer(agreements[_id].amount);
36 | }
37 | if (msg.sender == agreements[_id].alice && agreements[_id].aliceIn == true) {
38 | agreements[_id].aliceIn = false;
39 | payable(agreements[_id].alice).transfer(agreements[_id].amount);
40 | }
41 | }
42 |
43 | function complete(uint _id, address _winner) external {
44 | require(msg.sender == agreements[_id].arbitrator, "Only arbitrator can complete");
45 | require(agreements[_id].bobIn == true, "Bob has not paid");
46 | require(agreements[_id].aliceIn == true, "Alice has not paid");
47 |
48 | if (agreements[_id].bob == _winner) {
49 | agreements[_id].bobIn = false;
50 | agreements[_id].aliceIn = false;
51 | payable(agreements[_id].bob).transfer(agreements[_id].amount * 2);
52 | }
53 | else if (agreements[_id].alice == _winner) {
54 | agreements[_id].bobIn = false;
55 | agreements[_id].aliceIn = false;
56 | payable(agreements[_id].alice).transfer(agreements[_id].amount * 2);
57 | }
58 | }
59 | }
--------------------------------------------------------------------------------
/hardhat.config.js:
--------------------------------------------------------------------------------
1 | require("@nomiclabs/hardhat-waffle");
2 |
3 | // This is a sample Hardhat task. To learn how to create your own go to
4 | // https://hardhat.org/guides/create-task.html
5 | task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
6 | const accounts = await hre.ethers.getSigners();
7 |
8 | for (const account of accounts) {
9 | console.log(account.address);
10 | }
11 | });
12 |
13 | // You need to export an object to set up your config
14 | // Go to https://hardhat.org/config/ to learn more
15 |
16 | /**
17 | * @type import('hardhat/config').HardhatUserConfig
18 | */
19 | module.exports = {
20 | solidity: "0.8.4",
21 | };
22 |
--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
1 | {
2 | "name": "solidity-snippets",
3 | "dependencies": {
4 | "@remix-project/remixd": "^0.6.9"
5 | }
6 | }
7 |
--------------------------------------------------------------------------------
/scripts/merkleGenerator.js:
--------------------------------------------------------------------------------
1 | const {MerkleTree} = require("merkletreejs");
2 | const keccak256 = require("keccak256");
3 | const whitelist = ['0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef','0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8'];
4 | const leaves = whitelist.map(addr => keccak256(addr));
5 | const merkleTree = new MerkleTree(leaves, keccak256, {sortPairs: true});
6 | const rootHash = merkleTree.getRoot().toString('hex');
7 | console.log(`Whitelist Merkle Root: 0x${rootHash}`);
8 | whitelist.forEach((address) => {
9 | const proof = merkleTree.getHexProof(keccak256(address));
10 | console.log(`Adddress: ${address} Proof: ${proof}`);
11 | });
12 |
--------------------------------------------------------------------------------
/scripts/sample-script.js:
--------------------------------------------------------------------------------
1 | // We require the Hardhat Runtime Environment explicitly here. This is optional
2 | // but useful for running the script in a standalone fashion through `node
7 |
43 |