├── .gitignore ├── .gitmodules ├── LICENSE ├── README.md ├── contracts ├── README.md ├── remappings.txt └── src │ ├── MerkleClaimERC20.sol │ └── test │ ├── MerkleClaimERC20.t.sol │ └── utils │ ├── MerkleClaimERC20Test.sol │ └── MerkleClaimERC20User.sol ├── frontend ├── .env.sample ├── .eslintrc.json ├── README.md ├── components │ ├── Footer.tsx │ ├── Header.tsx │ ├── Layout.tsx │ └── Meta.tsx ├── config.ts ├── next-env.d.ts ├── next.config.js ├── package-lock.json ├── package.json ├── pages │ ├── _app.tsx │ ├── _document.tsx │ ├── claim.tsx │ └── index.tsx ├── public │ ├── favicon.ico │ ├── icons │ │ ├── arrow.svg │ │ ├── discord.svg │ │ ├── github.svg │ │ ├── info.svg │ │ └── twitter.svg │ ├── logo.png │ └── meta.png ├── state │ ├── eth.ts │ ├── index.tsx │ └── token.ts ├── styles │ ├── components │ │ ├── Footer.module.scss │ │ ├── Header.module.scss │ │ └── Layout.module.scss │ ├── global.scss │ └── pages │ │ ├── Claim.module.scss │ │ └── Home.module.scss └── tsconfig.json └── generator ├── .eslintrc.json ├── .prettierrc.json ├── README.md ├── config.json ├── package-lock.json ├── package.json ├── src ├── app.ts ├── generator.ts └── utils │ └── logger.ts └── tsconfig.json /.gitignore: -------------------------------------------------------------------------------- 1 | # Misc 2 | .DS_Store 3 | 4 | # Contracts 5 | contracts/cache 6 | contracts/out 7 | 8 | # Generator 9 | generator/node_modules 10 | generator/dist 11 | generator/*.log 12 | generator/merkle.json 13 | 14 | # Frontend 15 | frontend/.env.local 16 | frontend/node_modules 17 | frontend/out 18 | frontend/.next 19 | frontend/.vercel -------------------------------------------------------------------------------- /.gitmodules: -------------------------------------------------------------------------------- 1 | [submodule "contracts/lib/ds-test"] 2 | path = contracts/lib/ds-test 3 | url = https://github.com/dapphub/ds-test 4 | [submodule "contracts/lib/solmate"] 5 | path = contracts/lib/solmate 6 | url = https://github.com/rari-capital/solmate 7 | [submodule "contracts/lib/openzeppelin-contracts"] 8 | path = contracts/lib/openzeppelin-contracts 9 | url = https://github.com/OpenZeppelin/openzeppelin-contracts 10 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Merkle Airdrop Starter 2 | 3 | Quickly bootstrap an ERC20 token airdrop to a Merkle tree of recipients. 4 | 5 | Steps: 6 | 7 | 1. Generate Merkle tree of recipients by following README in [generator/](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/tree/master/generator) 8 | 2. Setup and deploy MerkleClaimERC20 contracts by following README in [contracts/](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/tree/master/contracts) 9 | 3. Setup and deploy front-end by following README in [frontend/](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/tree/master/frontend) 10 | 11 | ## Similar work and credits 12 | 13 | - [Astrodrop](https://astrodrop.xyz/)—Simpler way to spin up a airdrop with claim page, given existing token 14 | - [Uniswap Merkle Distributor](https://github.com/Uniswap/merkle-distributor)—Uniswap's merkle distribution smart contracts 15 | 16 | ## License 17 | 18 | [GNU Affero GPL v3.0](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/blob/master/LICENSE) 19 | 20 | ## Disclaimer 21 | 22 | _These smart contracts are being provided as is. No guarantee, representation or warranty is being made, express or implied, as to the safety or correctness of the user interface or the smart contracts. They have not been audited and as such there can be no assurance they will work as intended, and users may experience delays, failures, errors, omissions or loss of transmitted information. Anish Agnihotri is not liable for any of the foregoing. Users should proceed with caution and use at their own risk._ 23 | -------------------------------------------------------------------------------- /contracts/README.md: -------------------------------------------------------------------------------- 1 | # MerkleClaimERC20 2 | 3 | ERC20 token claimable by members of a [Merkle tree](https://en.wikipedia.org/wiki/Merkle_tree). Useful for conducting Airdrops. Utilizes [Solmate ERC20](https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol) for modern ERC20 token implementation. 4 | 5 | ## Test 6 | 7 | Tests use [Foundry: Forge](https://github.com/gakonst/foundry). 8 | 9 | Install Foundry using the installation steps in the README of the linked repo. 10 | 11 | ### Run tests 12 | 13 | ```bash 14 | # Go to contracts directory, if not already there 15 | cd contracts/ 16 | 17 | # Get dependencies 18 | forge update 19 | 20 | # Run tests 21 | forge test --root . 22 | # Run tests with stack traces 23 | forge test --root . -vvvv 24 | ``` 25 | 26 | ## Deploy 27 | 28 | Follow the `forge create` instructions ([CLI README](https://github.com/gakonst/foundry/blob/master/cli/README.md#build)) to deploy your contracts or use [Remix](https://remix.ethereum.org/). 29 | 30 | You can specify the token `name`, `symbol`, `decimals`, and airdrop `merkleRoot` upon deploy. 31 | 32 | ## Credits 33 | 34 | - [@brockelmore](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/issues?q=is%3Apr+author%3Abrockelmore) for [#1](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/pull/1) 35 | - [@transmissions11](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/issues?q=is%3Apr+author%3Atransmissions11) for [#2](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/pull/2) 36 | - [@devanonon](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/issues?q=is%3Apr+author%3Adevanonon) for [#3](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/pull/8) 37 | -------------------------------------------------------------------------------- /contracts/remappings.txt: -------------------------------------------------------------------------------- 1 | ds-test/=lib/ds-test/src/ 2 | @solmate/=lib/solmate/src/ 3 | @openzeppelin/=lib/openzeppelin-contracts/contracts/ -------------------------------------------------------------------------------- /contracts/src/MerkleClaimERC20.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: AGPL-3.0-only 2 | pragma solidity >=0.8.0; 3 | 4 | /// ============ Imports ============ 5 | 6 | import { ERC20 } from "@solmate/tokens/ERC20.sol"; // Solmate: ERC20 7 | import { MerkleProof } from "@openzeppelin/utils/cryptography/MerkleProof.sol"; // OZ: MerkleProof 8 | 9 | /// @title MerkleClaimERC20 10 | /// @notice ERC20 claimable by members of a merkle tree 11 | /// @author Anish Agnihotri 12 | /// @dev Solmate ERC20 includes unused _burn logic that can be removed to optimize deployment cost 13 | contract MerkleClaimERC20 is ERC20 { 14 | 15 | /// ============ Immutable storage ============ 16 | 17 | /// @notice ERC20-claimee inclusion root 18 | bytes32 public immutable merkleRoot; 19 | 20 | /// ============ Mutable storage ============ 21 | 22 | /// @notice Mapping of addresses who have claimed tokens 23 | mapping(address => bool) public hasClaimed; 24 | 25 | /// ============ Errors ============ 26 | 27 | /// @notice Thrown if address has already claimed 28 | error AlreadyClaimed(); 29 | /// @notice Thrown if address/amount are not part of Merkle tree 30 | error NotInMerkle(); 31 | 32 | /// ============ Constructor ============ 33 | 34 | /// @notice Creates a new MerkleClaimERC20 contract 35 | /// @param _name of token 36 | /// @param _symbol of token 37 | /// @param _decimals of token 38 | /// @param _merkleRoot of claimees 39 | constructor( 40 | string memory _name, 41 | string memory _symbol, 42 | uint8 _decimals, 43 | bytes32 _merkleRoot 44 | ) ERC20(_name, _symbol, _decimals) { 45 | merkleRoot = _merkleRoot; // Update root 46 | } 47 | 48 | /// ============ Events ============ 49 | 50 | /// @notice Emitted after a successful token claim 51 | /// @param to recipient of claim 52 | /// @param amount of tokens claimed 53 | event Claim(address indexed to, uint256 amount); 54 | 55 | /// ============ Functions ============ 56 | 57 | /// @notice Allows claiming tokens if address is part of merkle tree 58 | /// @param to address of claimee 59 | /// @param amount of tokens owed to claimee 60 | /// @param proof merkle proof to prove address and amount are in tree 61 | function claim(address to, uint256 amount, bytes32[] calldata proof) external { 62 | // Throw if address has already claimed tokens 63 | if (hasClaimed[to]) revert AlreadyClaimed(); 64 | 65 | // Verify merkle proof, or revert if not in tree 66 | bytes32 leaf = keccak256(abi.encodePacked(to, amount)); 67 | bool isValidLeaf = MerkleProof.verify(proof, merkleRoot, leaf); 68 | if (!isValidLeaf) revert NotInMerkle(); 69 | 70 | // Set address to claimed 71 | hasClaimed[to] = true; 72 | 73 | // Mint tokens to address 74 | _mint(to, amount); 75 | 76 | // Emit claim event 77 | emit Claim(to, amount); 78 | } 79 | } 80 | -------------------------------------------------------------------------------- /contracts/src/test/MerkleClaimERC20.t.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: Unlicense 2 | pragma solidity >=0.8.0; 3 | 4 | /// ============ Imports ============ 5 | 6 | import { MerkleClaimERC20Test } from "./utils/MerkleClaimERC20Test.sol"; // Test scaffolding 7 | 8 | /// @title Tests 9 | /// @notice MerkleClaimERC20 tests 10 | /// @author Anish Agnihotri 11 | contract Tests is MerkleClaimERC20Test { 12 | /// @notice Allow Alice to claim 100e18 tokens 13 | function testAliceClaim() public { 14 | // Setup correct proof for Alice 15 | bytes32[] memory aliceProof = new bytes32[](1); 16 | aliceProof[0] = 0xceeae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 17 | 18 | // Collect Alice balance of tokens before claim 19 | uint256 alicePreBalance = ALICE.tokenBalance(); 20 | 21 | // Claim tokens 22 | ALICE.claim( 23 | // Claiming for Alice 24 | address(ALICE), 25 | // 100 tokens 26 | 100e18, 27 | // With valid proof 28 | aliceProof 29 | ); 30 | 31 | // Collect Alice balance of tokens after claim 32 | uint256 alicePostBalance = ALICE.tokenBalance(); 33 | 34 | // Assert Alice balance before + 100 tokens = after balance 35 | assertEq(alicePostBalance, alicePreBalance + 100e18); 36 | } 37 | 38 | /// @notice Prevent Alice from claiming twice 39 | function testFailAliceClaimTwice() public { 40 | // Setup correct proof for Alice 41 | bytes32[] memory aliceProof = new bytes32[](1); 42 | aliceProof[0] = 0xceeae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 43 | 44 | // Claim tokens 45 | ALICE.claim( 46 | // Claiming for Alice 47 | address(ALICE), 48 | // 100 tokens 49 | 100e18, 50 | // With valid proof 51 | aliceProof 52 | ); 53 | 54 | // Claim tokens again 55 | ALICE.claim( 56 | // Claiming for Alice 57 | address(ALICE), 58 | // 100 tokens 59 | 100e18, 60 | // With valid proof 61 | aliceProof 62 | ); 63 | } 64 | 65 | /// @notice Prevent Alice from claiming with invalid proof 66 | function testFailAliceClaimInvalidProof() public { 67 | // Setup incorrect proof for Alice 68 | bytes32[] memory aliceProof = new bytes32[](1); 69 | aliceProof[0] = 0xc11ae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 70 | 71 | // Claim tokens 72 | ALICE.claim( 73 | // Claiming for Alice 74 | address(ALICE), 75 | // 100 tokens 76 | 100e18, 77 | // With valid proof 78 | aliceProof 79 | ); 80 | } 81 | 82 | /// @notice Prevent Alice from claiming with invalid amount 83 | function testFailAliceClaimInvalidAmount() public { 84 | // Setup correct proof for Alice 85 | bytes32[] memory aliceProof = new bytes32[](1); 86 | aliceProof[0] = 0xceeae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 87 | 88 | // Claim tokens 89 | ALICE.claim( 90 | // Claiming for Alice 91 | address(ALICE), 92 | // Incorrect: 1000 tokens 93 | 1000e18, 94 | // With valid proof (for 100 tokens) 95 | aliceProof 96 | ); 97 | } 98 | 99 | /// @notice Prevent Bob from claiming 100 | function testFailBobClaim() public { 101 | // Setup correct proof for Alice 102 | bytes32[] memory aliceProof = new bytes32[](1); 103 | aliceProof[0] = 0xceeae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 104 | 105 | // Claim tokens 106 | BOB.claim( 107 | // Claiming for Bob 108 | address(BOB), 109 | // 100 tokens 110 | 100e18, 111 | // With valid proof (for Alice) 112 | aliceProof 113 | ); 114 | } 115 | 116 | /// @notice Let Bob claim on behalf of Alice 117 | function testBobClaimForAlice() public { 118 | // Setup correct proof for Alice 119 | bytes32[] memory aliceProof = new bytes32[](1); 120 | aliceProof[0] = 0xceeae64152a2deaf8c661fccd5645458ba20261b16d2f6e090fe908b0ac9ca88; 121 | 122 | // Collect Alice balance of tokens before claim 123 | uint256 alicePreBalance = ALICE.tokenBalance(); 124 | 125 | // Claim tokens 126 | BOB.claim( 127 | // Claiming for Alice 128 | address(ALICE), 129 | // 100 tokens 130 | 100e18, 131 | // With valid proof (for Alice) 132 | aliceProof 133 | ); 134 | 135 | // Collect Alice balance of tokens after claim 136 | uint256 alicePostBalance = ALICE.tokenBalance(); 137 | 138 | // Assert Alice balance before + 100 tokens = after balance 139 | assertEq(alicePostBalance, alicePreBalance + 100e18); 140 | } 141 | } 142 | -------------------------------------------------------------------------------- /contracts/src/test/utils/MerkleClaimERC20Test.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: AGPL-3.0-only 2 | pragma solidity >=0.8.0; 3 | 4 | /// ============ Imports ============ 5 | 6 | import { DSTest } from "ds-test/test.sol"; // DSTest 7 | import { MerkleClaimERC20 } from "../../MerkleClaimERC20.sol"; // MerkleClaimERC20 8 | import { MerkleClaimERC20User } from "./MerkleClaimERC20User.sol"; // MerkleClaimERC20 user 9 | 10 | /// @title MerkleClaimERC20Test 11 | /// @notice Scaffolding for MerkleClaimERC20 tests 12 | /// @author Anish Agnihotri 13 | contract MerkleClaimERC20Test is DSTest { 14 | 15 | /// ============ Storage ============ 16 | 17 | /// @dev MerkleClaimERC20 contract 18 | MerkleClaimERC20 internal TOKEN; 19 | /// @dev User: Alice (in merkle tree) 20 | MerkleClaimERC20User internal ALICE; 21 | /// @dev User: Bob (not in merkle tree) 22 | MerkleClaimERC20User internal BOB; 23 | 24 | /// ============ Setup test suite ============ 25 | 26 | function setUp() public virtual { 27 | // Create airdrop token 28 | TOKEN = new MerkleClaimERC20( 29 | "My Token", 30 | "MT", 31 | 18, 32 | // Merkle root containing ALICE with 100e18 tokens but no BOB 33 | 0xd0aa6a4e5b4e13462921d7518eebdb7b297a7877d6cfe078b0c318827392fb55 34 | ); 35 | 36 | // Setup airdrop users 37 | ALICE = new MerkleClaimERC20User(TOKEN); // 0x185a4dc360ce69bdccee33b3784b0282f7961aea 38 | BOB = new MerkleClaimERC20User(TOKEN); // 0xefc56627233b02ea95bae7e19f648d7dcd5bb132 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /contracts/src/test/utils/MerkleClaimERC20User.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: AGPL-3.0-only 2 | pragma solidity >=0.8.0; 3 | 4 | /// ============ Imports ============ 5 | 6 | import { MerkleClaimERC20 } from "../../MerkleClaimERC20.sol"; // MerkleClaimERC20 7 | 8 | /// @title MerkleClaimERC20User 9 | /// @notice Mock MerkleClaimERC20 user 10 | /// @author Anish Agnihotri 11 | contract MerkleClaimERC20User { 12 | 13 | /// ============ Immutable storage ============ 14 | 15 | /// @dev MerkleClaimERC20 contract 16 | MerkleClaimERC20 immutable internal TOKEN; 17 | 18 | /// ============ Constructor ============ 19 | 20 | /// @notice Creates a new MerkleClaimERC20User 21 | /// @param _TOKEN MerkleClaimERC20 contract 22 | constructor(MerkleClaimERC20 _TOKEN) { 23 | TOKEN = _TOKEN; 24 | } 25 | 26 | /// ============ Helper functions ============ 27 | 28 | /// @notice Returns users' token balance 29 | function tokenBalance() public view returns (uint256) { 30 | return TOKEN.balanceOf(address(this)); 31 | } 32 | 33 | /// ============ Inherited functionality ============ 34 | 35 | /// @notice Allows user to claim tokens from contract 36 | /// @param to address of claimee 37 | /// @param amount of tokens owed to claimee 38 | /// @param proof merkle proof to prove address and amount are in tree 39 | function claim(address to, uint256 amount, bytes32[] calldata proof) public { 40 | TOKEN.claim(to, amount, proof); 41 | } 42 | } -------------------------------------------------------------------------------- /frontend/.env.sample: -------------------------------------------------------------------------------- 1 | # Logo 2 | NEXT_PUBLIC_LOGO_PATH="/logo.png" 3 | 4 | # Home page 5 | NEXT_PUBLIC_URL="http://localhost:3000/" 6 | NEXT_PUBLIC_TOKEN_NAME="ΞTOKEN" 7 | NEXT_PUBLIC_HEADING="Some heading about airdrop" 8 | NEXT_PUBLIC_DESCRIPTION="Some incredibly long description about airdrop that tells the reader what they stand to benefit by spending their ETH, paying gas, and claiming your airdrop." 9 | 10 | # Social links 11 | NEXT_PUBLIC_DISCORD="https://discord.gg/" 12 | NEXT_PUBLIC_TWITTER="https://twitter.com/" 13 | NEXT_PUBLIC_ARTICLE="https://mirror.xyz/" 14 | NEXT_PUBLIC_GITHUB="https://github.com/" 15 | 16 | # Functionality 17 | NEXT_PUBLIC_CONTRACT_ADDRESS="0x..." 18 | NEXT_PUBLIC_RPC_NETWORK="4" 19 | NEXT_PUBLIC_RPC_URL="https://eth-rinkeby.alchemyapi.io/v2/your_api_key" -------------------------------------------------------------------------------- /frontend/.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": "next/core-web-vitals" 3 | } 4 | -------------------------------------------------------------------------------- /frontend/README.md: -------------------------------------------------------------------------------- 1 | # frontend 2 | 3 | Accompanies [MerkleDropERC20](https://github.com/Anish-Agnihotri/merkle-airdrop-starter/tree/master/contracts) contracts; heavy similarity to the [GAS DAO airdrop frontend](https://www.gasdao.org/) (GAS DAO: implemented by [sax](https://twitter.com/0xsaxophone), originally inspired by work from [design @ens](https://twitter.com/dzneth) for the [$ENS airdrop claim](https://claim.ens.domains/)). 4 | 5 | Allows users to connect their wallet and claim airdrops, given they are part of the Merkle tree. 6 | 7 | ## Run + deploy 8 | 9 | The frontend is built to be fully configurable and ready-to-go in under 10 minutes of dev time. Steps to customize and deploy: 10 | 11 | 1. Modify `config.ts:L9` with exact config from `generator/config.json` 12 | 2. Copy environment variables (`cp .env.sample .env.local`) and modify parameters 13 | 3. Update the `logo.png` (recommended: 250x250) and `meta.png` (recommended: 1200x637) in `public/` 14 | 4. Then, `npm install` (install dependencies) and `npm run dev` to run development build 15 | -------------------------------------------------------------------------------- /frontend/components/Footer.tsx: -------------------------------------------------------------------------------- 1 | import Image from "next/image"; // Images 2 | import styles from "styles/components/Footer.module.scss"; // Component styles 3 | 4 | /** 5 | * Links to render in footer 6 | * @dev Does not render any links where url is undefined, allowing conditional rendering 7 | */ 8 | const footerLinks: { icon: string; url: string | undefined }[] = [ 9 | // Discord 10 | { icon: "/icons/discord.svg", url: process.env.NEXT_PUBLIC_DISCORD }, 11 | // Twitter 12 | { icon: "/icons/twitter.svg", url: process.env.NEXT_PUBLIC_TWITTER }, 13 | // Github 14 | { icon: "/icons/github.svg", url: process.env.NEXT_PUBLIC_GITHUB }, 15 | ]; 16 | 17 | export default function Footer() { 18 | return ( 19 |
20 | {footerLinks.map(({ icon, url }, i) => { 21 | // For each link in footer that is valid 22 | return url ? ( 23 | // Render link with icon image 24 | 25 | Social link 26 | 27 | ) : null; 28 | })} 29 |
30 | ); 31 | } 32 | -------------------------------------------------------------------------------- /frontend/components/Header.tsx: -------------------------------------------------------------------------------- 1 | import Link from "next/link"; // Dynamic routing 2 | import Image from "next/image"; // Images 3 | import { eth } from "state/eth"; // Global state 4 | import { useState } from "react"; // State management 5 | import styles from "styles/components/Header.module.scss"; // Component styles 6 | 7 | /** 8 | * Links to render in action menu 9 | * @dev Does not render any links where url is undefined, allowing conditional rendering 10 | */ 11 | const actionMenuLinks: { 12 | name: string; 13 | icon: string; 14 | url: string | undefined; 15 | }[] = [ 16 | { 17 | name: "About", 18 | icon: "/icons/info.svg", 19 | url: process.env.NEXT_PUBLIC_ARTICLE, 20 | }, 21 | { 22 | name: "Discord", 23 | icon: "/icons/discord.svg", 24 | url: process.env.NEXT_PUBLIC_DISCORD, 25 | }, 26 | { 27 | name: "Twitter", 28 | icon: "/icons/twitter.svg", 29 | url: process.env.NEXT_PUBLIC_TWITTER, 30 | }, 31 | { 32 | name: "GitHub", 33 | icon: "/icons/github.svg", 34 | url: process.env.NEXT_PUBLIC_GITHUB, 35 | }, 36 | ]; 37 | 38 | // Three dots image data (for second button) 39 | const threeDotsImage: string = 40 | "data:image/png;base64,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41 | 42 | export default function Header() { 43 | // Global state 44 | const { address, unlock }: { address: string | null; unlock: Function } = 45 | eth.useContainer(); 46 | // Action menu open state 47 | const [menuOpen, setMenuOpen] = useState(false); 48 | 49 | return ( 50 |
51 | {/* Logo */} 52 |
53 | 54 | 55 | Logo 56 | 57 | 58 |
59 | 60 | {/* Auth + details */} 61 |
62 | {/* Unlock button */} 63 | 71 | 72 | {/* Actions button */} 73 | 77 |
78 | 79 | {menuOpen ? ( 80 | // Render actions menu if open 81 |
82 | {actionMenuLinks.map(({ name, icon, url }, i) => { 83 | // For each link with a defined url 84 | return url ? ( 85 | // Render action link containing name and image 86 | 87 | {name} 88 | {`${name} 89 | 90 | ) : null; 91 | })} 92 |
93 | ) : null} 94 |
95 | ); 96 | } 97 | -------------------------------------------------------------------------------- /frontend/components/Layout.tsx: -------------------------------------------------------------------------------- 1 | import Meta from "components/Meta"; // Components: Meta 2 | import Header from "components/Header"; // Components: Header 3 | import Footer from "components/Footer"; // Components: Footer 4 | import type { ReactElement } from "react"; // Types 5 | import styles from "styles/components/Layout.module.scss"; // Component styles 6 | 7 | export default function Layout({ 8 | children, 9 | }: { 10 | children: ReactElement | ReactElement[]; 11 | }) { 12 | return ( 13 | // Layout wrapper 14 |
15 | {/* Site meta */} 16 | 17 | 18 | {/* Global header */} 19 |
20 | 21 | {/* Injected child content */} 22 |
{children}
23 | 24 | {/* Global footer */} 25 |
26 |
27 | ); 28 | } 29 | -------------------------------------------------------------------------------- /frontend/components/Meta.tsx: -------------------------------------------------------------------------------- 1 | import Head from "next/head"; // HTML Head 2 | 3 | // Setup project details 4 | const url: string = process.env.NEXT_PUBLIC_URL ?? "https://token.com/"; 5 | const tokenName: string = process.env.NEXT_PUBLIC_TOKEN_NAME ?? "Token Name"; 6 | const description: string = 7 | process.env.NEXT_PUBLIC_DESCRIPTION ?? "Some description"; 8 | 9 | export default function Meta() { 10 | return ( 11 | 12 | {/* Fonts: Inter */} 13 | 14 | 19 | 23 | 24 | {/* Primary Meta */} 25 | {tokenName} 26 | 27 | 28 | 29 | {/* Open Graph + Facebook */} 30 | 31 | 32 | 33 | 34 | 35 | 36 | {/* Twitter */} 37 | 38 | 39 | 40 | 41 | 42 | 43 | {/* Favicon */} 44 | 45 | 46 | ); 47 | } 48 | -------------------------------------------------------------------------------- /frontend/config.ts: -------------------------------------------------------------------------------- 1 | // Types 2 | type IConfig = { 3 | decimals: number; 4 | airdrop: Record; 5 | }; 6 | 7 | // Config from generator 8 | const config: IConfig = { 9 | decimals: 18, 10 | airdrop: { 11 | "0x016C8780e5ccB32E5CAA342a926794cE64d9C364": 10, 12 | "0x185a4dc360ce69bdccee33b3784b0282f7961aea": 100, 13 | }, 14 | }; 15 | 16 | // Export config 17 | export default config; 18 | -------------------------------------------------------------------------------- /frontend/next-env.d.ts: -------------------------------------------------------------------------------- 1 | /// 2 | /// 3 | 4 | // NOTE: This file should not be edited 5 | // see https://nextjs.org/docs/basic-features/typescript for more information. 6 | -------------------------------------------------------------------------------- /frontend/next.config.js: -------------------------------------------------------------------------------- 1 | /** @type {import('next').NextConfig} */ 2 | module.exports = { 3 | reactStrictMode: true, 4 | }; 5 | -------------------------------------------------------------------------------- /frontend/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "frontend", 3 | "version": "0.1.0", 4 | "private": true, 5 | "scripts": { 6 | "dev": "next dev", 7 | "build": "next build", 8 | "start": "next start", 9 | "lint": "next lint" 10 | }, 11 | "dependencies": { 12 | "bnc-onboard": "^1.37.0", 13 | "ethers": "^5.5.2", 14 | "keccak256": "^1.0.6", 15 | "merkletreejs": "^0.2.27", 16 | "next": "12.0.7", 17 | "react": "17.0.2", 18 | "react-dom": "17.0.2", 19 | "sass": "^1.45.1", 20 | "unstated-next": "^1.1.0" 21 | }, 22 | "devDependencies": { 23 | "@types/react": "17.0.38", 24 | "eslint": "8.5.0", 25 | "eslint-config-next": "12.0.7", 26 | "typescript": "4.5.4" 27 | } 28 | } 29 | -------------------------------------------------------------------------------- /frontend/pages/_app.tsx: -------------------------------------------------------------------------------- 1 | import "styles/global.scss"; // Global styles 2 | import StateProvider from "state"; // Global state provider 3 | import type { AppProps } from "next/app"; // Types 4 | 5 | // Export application 6 | export default function MerkleAirdropStarter({ 7 | Component, 8 | pageProps, 9 | }: AppProps) { 10 | return ( 11 | // Wrap application in global state provider 12 | 13 | 14 | 15 | ); 16 | } 17 | -------------------------------------------------------------------------------- /frontend/pages/_document.tsx: -------------------------------------------------------------------------------- 1 | // Document imports 2 | import Document, { 3 | DocumentContext, 4 | Html, 5 | Head, 6 | Main, 7 | NextScript, 8 | } from "next/document"; 9 | 10 | // Custom document class 11 | export default class MyDocument extends Document { 12 | // Collect and return props 13 | static async getInitialProps(ctx: DocumentContext) { 14 | const initialProps = await Document.getInitialProps(ctx); 15 | return { ...initialProps }; 16 | } 17 | 18 | render() { 19 | return ( 20 | // Wrap in html with custom lang param 21 | 22 | {/* Preload head */} 23 | 24 | 25 |
26 | 27 | 28 | 29 | ); 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /frontend/pages/claim.tsx: -------------------------------------------------------------------------------- 1 | import { eth } from "state/eth"; // Global state: ETH 2 | import { useState } from "react"; // State management 3 | import { token } from "state/token"; // Global state: Tokens 4 | import Layout from "components/Layout"; // Layout wrapper 5 | import styles from "styles/pages/Claim.module.scss"; // Page styles 6 | 7 | export default function Claim() { 8 | // Global ETH state 9 | const { address, unlock }: { address: string | null; unlock: Function } = 10 | eth.useContainer(); 11 | // Global token state 12 | const { 13 | dataLoading, 14 | numTokens, 15 | alreadyClaimed, 16 | claimAirdrop, 17 | }: { 18 | dataLoading: boolean; 19 | numTokens: number; 20 | alreadyClaimed: boolean; 21 | claimAirdrop: Function; 22 | } = token.useContainer(); 23 | // Local button loading 24 | const [buttonLoading, setButtonLoading] = useState(false); 25 | 26 | /** 27 | * Claims airdrop with local button loading 28 | */ 29 | const claimWithLoading = async () => { 30 | setButtonLoading(true); // Toggle 31 | await claimAirdrop(); // Claim 32 | setButtonLoading(false); // Toggle 33 | }; 34 | 35 | return ( 36 | 37 |
38 | {!address ? ( 39 | // Not authenticated 40 |
41 |

You are not authenticated.

42 |

Please connect with your wallet to check your airdrop.

43 | 44 |
45 | ) : dataLoading ? ( 46 | // Loading details about address 47 |
48 |

Loading airdrop details...

49 |

Please hold while we collect details about your address.

50 |
51 | ) : numTokens == 0 ? ( 52 | // Not part of airdrop 53 |
54 |

You do not qualify.

55 |

Unfortunately, your address does not qualify for the airdrop.

56 |
57 | ) : alreadyClaimed ? ( 58 | // Already claimed airdrop 59 |
60 |

Already claimed.

61 |

62 | Your address ({address}) has already claimed {numTokens} tokens. 63 |

64 |
65 | ) : ( 66 | // Claim your airdrop 67 |
68 |

Claim your airdrop.

69 |

Your address qualifies for {numTokens} tokens.

70 | 73 |
74 | )} 75 |
76 | 77 | ); 78 | } 79 | -------------------------------------------------------------------------------- /frontend/pages/index.tsx: -------------------------------------------------------------------------------- 1 | import Image from "next/image"; // Images 2 | import { eth } from "state/eth"; // State container 3 | import Layout from "components/Layout"; // Layout wrapper 4 | import { useRouter } from "next/router"; // Routing 5 | import styles from "styles/pages/Home.module.scss"; // Page styles 6 | 7 | // Setup project details 8 | const tokenName: string = process.env.NEXT_PUBLIC_TOKEN_NAME ?? "Token Name"; 9 | const heading: string = process.env.NEXT_PUBLIC_HEADING ?? "Some heading"; 10 | const description: string = 11 | process.env.NEXT_PUBLIC_DESCRIPTION ?? "Some description"; 12 | 13 | export default function Home() { 14 | // Routing 15 | const { push } = useRouter(); 16 | // Authentication status 17 | const { address }: { address: string | null } = eth.useContainer(); 18 | 19 | return ( 20 | 21 |
22 | {/* Project logo */} 23 |
24 | Logo 25 |
26 | 27 | {/* Project introduction article, if it exists */} 28 | {process.env.NEXT_PUBLIC_ARTICLE ? ( 29 | 34 | Introducing {tokenName}{" "} 35 | Arrow 36 | 37 | ) : null} 38 | 39 | {/* Project heading */} 40 |

{heading}

41 | 42 | {/* Project description */} 43 |

{description}

44 | 45 | {/* Claim button */} 46 | {!address ? ( 47 | // If not authenticated, disabled 48 | 49 | ) : ( 50 | // Else, reroute to /claim 51 | 52 | )} 53 |
54 | 55 | ); 56 | } 57 | -------------------------------------------------------------------------------- /frontend/public/favicon.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anish-Agnihotri/merkle-airdrop-starter/b5fad7cb1cf4da27812011a71e8f1dec419028c7/frontend/public/favicon.ico -------------------------------------------------------------------------------- /frontend/public/icons/arrow.svg: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /frontend/public/icons/discord.svg: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /frontend/public/icons/github.svg: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /frontend/public/icons/info.svg: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /frontend/public/icons/twitter.svg: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /frontend/public/logo.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anish-Agnihotri/merkle-airdrop-starter/b5fad7cb1cf4da27812011a71e8f1dec419028c7/frontend/public/logo.png -------------------------------------------------------------------------------- /frontend/public/meta.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anish-Agnihotri/merkle-airdrop-starter/b5fad7cb1cf4da27812011a71e8f1dec419028c7/frontend/public/meta.png -------------------------------------------------------------------------------- /frontend/state/eth.ts: -------------------------------------------------------------------------------- 1 | import { ethers } from "ethers"; // Ethers 2 | import Onboard from "bnc-onboard"; // Onboard.js 3 | import { useEffect, useState } from "react"; // React 4 | import { createContainer } from "unstated-next"; // State management 5 | 6 | // Types 7 | import type { 8 | API, 9 | WalletInitOptions, 10 | WalletModule, 11 | } from "bnc-onboard/dist/src/interfaces"; 12 | import type { Web3Provider } from "@ethersproject/providers"; 13 | 14 | // Network 15 | const networkId = process.env.NEXT_PUBLIC_RPC_NETWORK 16 | ? // Use network 17 | Number(process.env.NEXT_PUBLIC_RPC_NETWORK) 18 | : // Else, default to Rinkeby 19 | 4; 20 | 21 | // Onboard.js wallet providers 22 | const wallets: (WalletModule | WalletInitOptions)[] = [ 23 | { walletName: "metamask" }, 24 | { 25 | walletName: "walletConnect", 26 | networkId, 27 | rpc: { 28 | [networkId]: process.env.NEXT_PUBLIC_RPC_URL ?? "", 29 | }, 30 | }, 31 | ]; 32 | 33 | // Token name 34 | const tokenName: string = process.env.NEXT_PUBLIC_TOKEN_NAME ?? "Token Name"; 35 | 36 | /** 37 | * Provides functionality for Eth account/state management 38 | */ 39 | function useEth() { 40 | const [address, setAddress] = useState(null); // User address 41 | const [onboard, setOnboard] = useState(null); // Onboard provider 42 | const [provider, setProvider] = useState(null); // Ethers provider 43 | 44 | /** 45 | * Unlock wallet, store ethers provider and address 46 | */ 47 | const unlock = async () => { 48 | // Enables wallet selection via BNC onboard 49 | if (onboard) { 50 | // Initialize wallet 51 | const walletSelected: boolean = await onboard.walletSelect(); 52 | // If initialized, ready wallet 53 | if (walletSelected) { 54 | await onboard.walletCheck(); 55 | } 56 | } 57 | }; 58 | 59 | /** 60 | * Initialize onboard instance and store 61 | */ 62 | const initializeOnboard = () => { 63 | // Onboard provider 64 | const onboard = Onboard({ 65 | networkId, 66 | // Hide Blocknative branding 67 | hideBranding: true, 68 | // Setup custom wallets for selection 69 | walletSelect: { 70 | heading: `Connect to ${tokenName}`, 71 | description: `Please select a wallet to authenticate with ${tokenName}.`, 72 | wallets: wallets, 73 | }, 74 | // Track subscriptions 75 | subscriptions: { 76 | // On address update 77 | address: async (address) => { 78 | // Update address 79 | setAddress(address); 80 | // If no address, nullify provider 81 | if (!address) { 82 | setProvider(null); 83 | } 84 | }, 85 | // On wallet update 86 | wallet: async (wallet) => { 87 | // If wallet provider exists 88 | if (wallet.provider) { 89 | // Collect ethers provider 90 | const provider = new ethers.providers.Web3Provider(wallet.provider); 91 | 92 | // Update provider 93 | setProvider(provider); 94 | 95 | // Update selected wallet 96 | window.localStorage.setItem("selectedWallet", wallet.name ?? ""); 97 | } else { 98 | // Nullify data 99 | setProvider(null); 100 | } 101 | }, 102 | }, 103 | // Force connect on walletCheck for WalletConnect 104 | walletCheck: [{ checkName: "connect" }, { checkName: "network" }], 105 | }); 106 | 107 | // Update onboard 108 | setOnboard(onboard); 109 | }; 110 | 111 | // --> Lifecycle: on mount 112 | useEffect(initializeOnboard, []); 113 | useEffect(() => { 114 | // If wallet was already selected and onboard exists 115 | const previouslySelectedWallet = 116 | window.localStorage.getItem("selectedWallet"); 117 | if (previouslySelectedWallet && onboard) { 118 | // Select, existing wallet 119 | onboard.walletSelect(previouslySelectedWallet); 120 | } 121 | }, [onboard]); 122 | 123 | return { address, provider, unlock }; 124 | } 125 | 126 | // Create unstated-next container 127 | export const eth = createContainer(useEth); 128 | -------------------------------------------------------------------------------- /frontend/state/index.tsx: -------------------------------------------------------------------------------- 1 | import { eth } from "state/eth"; // Eth state provider 2 | import { token } from "state/token"; // Token state provider 3 | import type { ReactElement } from "react"; // Types 4 | 5 | /** 6 | * State providing wrapper 7 | * @param {ReactElement | ReactElement[]} children to inject 8 | * @returns {ReactElement} wrapper 9 | */ 10 | export default function StateProvider({ 11 | children, 12 | }: { 13 | children: ReactElement | ReactElement[]; 14 | }): ReactElement { 15 | return ( 16 | // Wrap in sub-providers 17 | 18 | {children} 19 | 20 | ); 21 | } 22 | -------------------------------------------------------------------------------- /frontend/state/token.ts: -------------------------------------------------------------------------------- 1 | import config from "config"; // Airdrop config 2 | import { eth } from "state/eth"; // ETH state provider 3 | import { ethers } from "ethers"; // Ethers 4 | import keccak256 from "keccak256"; // Keccak256 hashing 5 | import MerkleTree from "merkletreejs"; // MerkleTree.js 6 | import { useEffect, useState } from "react"; // React 7 | import { createContainer } from "unstated-next"; // State management 8 | 9 | /** 10 | * Generate Merkle Tree leaf from address and value 11 | * @param {string} address of airdrop claimee 12 | * @param {string} value of airdrop tokens to claimee 13 | * @returns {Buffer} Merkle Tree node 14 | */ 15 | function generateLeaf(address: string, value: string): Buffer { 16 | return Buffer.from( 17 | // Hash in appropriate Merkle format 18 | ethers.utils 19 | .solidityKeccak256(["address", "uint256"], [address, value]) 20 | .slice(2), 21 | "hex" 22 | ); 23 | } 24 | 25 | // Setup merkle tree 26 | const merkleTree = new MerkleTree( 27 | // Generate leafs 28 | Object.entries(config.airdrop).map(([address, tokens]) => 29 | generateLeaf( 30 | ethers.utils.getAddress(address), 31 | ethers.utils.parseUnits(tokens.toString(), config.decimals).toString() 32 | ) 33 | ), 34 | // Hashing function 35 | keccak256, 36 | { sortPairs: true } 37 | ); 38 | 39 | function useToken() { 40 | // Collect global ETH state 41 | const { 42 | address, 43 | provider, 44 | }: { 45 | address: string | null; 46 | provider: ethers.providers.Web3Provider | null; 47 | } = eth.useContainer(); 48 | 49 | // Local state 50 | const [dataLoading, setDataLoading] = useState(true); // Data retrieval status 51 | const [numTokens, setNumTokens] = useState(0); // Number of claimable tokens 52 | const [alreadyClaimed, setAlreadyClaimed] = useState(false); // Claim status 53 | 54 | /** 55 | * Get contract 56 | * @returns {ethers.Contract} signer-initialized contract 57 | */ 58 | const getContract = (): ethers.Contract => { 59 | return new ethers.Contract( 60 | // Contract address 61 | process.env.NEXT_PUBLIC_CONTRACT_ADDRESS ?? "", 62 | [ 63 | // hasClaimed mapping 64 | "function hasClaimed(address) public view returns (bool)", 65 | // Claim function 66 | "function claim(address to, uint256 amount, bytes32[] calldata proof) external", 67 | ], 68 | // Get signer from authed provider 69 | provider?.getSigner() 70 | ); 71 | }; 72 | 73 | /** 74 | * Collects number of tokens claimable by a user from Merkle tree 75 | * @param {string} address to check 76 | * @returns {number} of tokens claimable 77 | */ 78 | const getAirdropAmount = (address: string): number => { 79 | // If address is in airdrop. convert address to correct checksum 80 | address = ethers.utils.getAddress(address) 81 | 82 | if (address in config.airdrop) { 83 | // Return number of tokens available 84 | return config.airdrop[address]; 85 | } 86 | 87 | // Else, return 0 tokens 88 | return 0; 89 | }; 90 | 91 | /** 92 | * Collects claim status for an address 93 | * @param {string} address to check 94 | * @returns {Promise} true if already claimed, false if available 95 | */ 96 | const getClaimedStatus = async (address: string): Promise => { 97 | // Collect token contract 98 | const token: ethers.Contract = getContract(); 99 | // Return claimed status 100 | return await token.hasClaimed(address); 101 | }; 102 | 103 | const claimAirdrop = async (): Promise => { 104 | // If not authenticated throw 105 | if (!address) { 106 | throw new Error("Not Authenticated"); 107 | } 108 | 109 | // Collect token contract 110 | const token: ethers.Contract = getContract(); 111 | // Get properly formatted address 112 | const formattedAddress: string = ethers.utils.getAddress(address); 113 | // Get tokens for address 114 | const numTokens: string = ethers.utils 115 | .parseUnits(config.airdrop[ethers.utils.getAddress(address)].toString(), config.decimals) 116 | .toString(); 117 | 118 | // Generate hashed leaf from address 119 | const leaf: Buffer = generateLeaf(formattedAddress, numTokens); 120 | // Generate airdrop proof 121 | const proof: string[] = merkleTree.getHexProof(leaf); 122 | 123 | // Try to claim airdrop and refresh sync status 124 | try { 125 | const tx = await token.claim(formattedAddress, numTokens, proof); 126 | await tx.wait(1); 127 | await syncStatus(); 128 | } catch (e) { 129 | console.error(`Error when claiming tokens: ${e}`); 130 | } 131 | }; 132 | 133 | /** 134 | * After authentication, update number of tokens to claim + claim status 135 | */ 136 | const syncStatus = async (): Promise => { 137 | // Toggle loading 138 | setDataLoading(true); 139 | 140 | // Force authentication 141 | if (address) { 142 | // Collect number of tokens for address 143 | const tokens = getAirdropAmount(address); 144 | setNumTokens(tokens); 145 | 146 | // Collect claimed status for address, if part of airdrop (tokens > 0) 147 | if (tokens > 0) { 148 | const claimed = await getClaimedStatus(address); 149 | setAlreadyClaimed(claimed); 150 | } 151 | } 152 | 153 | // Toggle loading 154 | setDataLoading(false); 155 | }; 156 | 157 | // On load: 158 | useEffect(() => { 159 | syncStatus(); 160 | }, [address]); 161 | 162 | return { 163 | dataLoading, 164 | numTokens, 165 | alreadyClaimed, 166 | claimAirdrop, 167 | }; 168 | } 169 | 170 | // Create unstated-next container 171 | export const token = createContainer(useToken); 172 | -------------------------------------------------------------------------------- /frontend/styles/components/Footer.module.scss: -------------------------------------------------------------------------------- 1 | // Footer 2 | .footer { 3 | // Spacey margin 4 | margin: 1rem 4rem; 5 | // Align right on desktop 6 | text-align: right; 7 | height: calc(70px - 2rem); 8 | 9 | // Individual social links 10 | > a { 11 | margin: 0.5rem; 12 | transition: 100ms ease; 13 | 14 | &:hover { 15 | opacity: 0.7; 16 | } 17 | } 18 | } 19 | 20 | // Responsive 21 | @media screen and (max-width: 728px) { 22 | .footer { 23 | // Align links center on mobile 24 | text-align: center; 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /frontend/styles/components/Header.module.scss: -------------------------------------------------------------------------------- 1 | // Header 2 | .header { 3 | padding: 1.5rem 3rem; 4 | display: flex; 5 | justify-content: space-between; 6 | -webkit-box-pack: justify; 7 | align-items: center; 8 | 9 | // Non-action-menu divs (seperate space-between) 10 | > div:nth-child(1), 11 | > div:nth-child(2) { 12 | width: auto; 13 | flex: 1 1 50%; 14 | display: flex; 15 | align-items: center; 16 | } 17 | } 18 | 19 | // Header: Logo 20 | .header__logo { 21 | justify-content: flex-start; 22 | 23 | > a { 24 | transition: 0.5s ease; 25 | 26 | &:hover { 27 | transform: rotate(10deg); 28 | } 29 | } 30 | } 31 | 32 | // Header: Connect Wallet + Actions menu 33 | .header__actions { 34 | justify-content: flex-end; 35 | 36 | // Universal hover colors 37 | > button { 38 | &:hover { 39 | border-color: rgb(201, 201, 201) !important; 40 | } 41 | } 42 | 43 | // Connect Wallet 44 | > button:nth-of-type(1) { 45 | min-width: 150px; 46 | line-height: 1.15; 47 | font-size: 16px; 48 | border-radius: 12px; 49 | padding: 1rem; 50 | margin: 0px 1rem; 51 | border: 1px solid rgb(255, 255, 255); 52 | color: rgb(0, 93, 194); 53 | background-color: rgb(186, 206, 255); 54 | } 55 | 56 | // Actions menu 57 | > button:nth-of-type(2) { 58 | border-radius: 12px; 59 | background: white; 60 | display: flex; 61 | align-items: center; 62 | justify-content: center; 63 | padding: 12px; 64 | border: 1px solid rgb(255, 255, 255); 65 | 66 | > img { 67 | display: flex; 68 | height: 25px; 69 | width: 25px; 70 | } 71 | } 72 | } 73 | 74 | // Header: Action menu 75 | .header__actionMenu { 76 | background-color: white; 77 | border-radius: 12px; 78 | width: 9rem; 79 | position: absolute; 80 | top: 88px; 81 | right: 3rem; 82 | box-shadow: 0 2px 4px 0 rgb(34 36 38 / 12%), 0 2px 10px 0 rgb(34 36 38 / 15%); 83 | z-index: 999; 84 | 85 | > a { 86 | color: #9e9e9e; 87 | font-size: 16px; 88 | display: flex; 89 | padding: 0.5rem; 90 | justify-content: space-between; 91 | -webkit-box-pack: justify; 92 | align-items: center; 93 | transition: 50ms ease; 94 | 95 | &:hover { 96 | opacity: 0.7; 97 | } 98 | } 99 | } 100 | 101 | // Responsive 102 | @media screen and (max-width: 728px) { 103 | .header { 104 | padding: 2rem 1rem; 105 | } 106 | 107 | .header__actionMenu { 108 | top: 96px; 109 | right: 1rem; 110 | } 111 | } 112 | -------------------------------------------------------------------------------- /frontend/styles/components/Layout.module.scss: -------------------------------------------------------------------------------- 1 | // Layout: Content 2 | .layout__content { 3 | // Force minimum height (to push footer to bottom without flexbox) 4 | min-height: calc(100vh - calc(70px - 2rem) - 150px); 5 | } 6 | -------------------------------------------------------------------------------- /frontend/styles/global.scss: -------------------------------------------------------------------------------- 1 | html, 2 | body { 3 | // Fix spacing 4 | margin: 0px; 5 | padding: 0px; 6 | 7 | // Font 8 | font-feature-settings: "ss01"; 9 | text-rendering: optimizeLegibility; 10 | font-family: "Inter", sans-serif; 11 | 12 | // Background 13 | background-color: rgb(247, 248, 250); 14 | } 15 | 16 | // Override default link styles 17 | a { 18 | color: inherit; 19 | text-decoration: none; 20 | } 21 | 22 | // Fix fonts for buttons and inputs 23 | button, 24 | input { 25 | font-feature-settings: "ss01"; 26 | text-rendering: optimizeLegibility; 27 | font-family: "Inter", sans-serif; 28 | cursor: pointer; 29 | } 30 | -------------------------------------------------------------------------------- /frontend/styles/pages/Claim.module.scss: -------------------------------------------------------------------------------- 1 | // Claim page 2 | .claim { 3 | // Sizing 4 | max-width: 600px; 5 | margin: 0px auto 50px auto; 6 | text-align: center; 7 | padding: 1rem; 8 | } 9 | 10 | // Individual card container 11 | .card { 12 | background: white; 13 | border-radius: 1rem; 14 | border: 1px solid rgb(227, 227, 227); 15 | padding: 2rem; 16 | width: calc(100% - 4rem - 20px); 17 | max-width: 500px; 18 | box-shadow: rgb(117 117 117 / 10%) 0px 10px 20px 5px; 19 | text-align: left; 20 | 21 | // Header 22 | > h1 { 23 | margin: 0px; 24 | line-height: 1.2; 25 | font-size: 25px; 26 | } 27 | 28 | // Description 29 | > p { 30 | line-height: 1.5; 31 | margin: 1rem 0px; 32 | } 33 | 34 | // Main blue button 35 | > button { 36 | width: 100%; 37 | margin-top: 1rem; 38 | font-weight: 500; 39 | border-radius: 12px; 40 | padding: 1rem; 41 | font-size: 16px; 42 | border: 1px solid rgb(255, 255, 255); 43 | color: rgb(0, 93, 194); 44 | background-color: rgb(186, 206, 255); 45 | 46 | &:hover { 47 | border-color: rgb(201, 201, 201); 48 | } 49 | 50 | // Disable border color change on disabled hover 51 | &:disabled:hover { 52 | border-color: rgb(255, 255, 255) !important; 53 | } 54 | 55 | &:disabled { 56 | opacity: 0.5; 57 | border-color: rgb(255, 255, 255) !important; 58 | cursor: not-allowed; 59 | } 60 | } 61 | } 62 | -------------------------------------------------------------------------------- /frontend/styles/pages/Home.module.scss: -------------------------------------------------------------------------------- 1 | .home { 2 | // Sizing 3 | max-width: 500px; 4 | margin: 0px auto 50px auto; 5 | text-align: center; 6 | padding: 1rem; 7 | 8 | // Logo 9 | > div { 10 | margin: 2.5rem; 11 | } 12 | 13 | // Article link 14 | > a { 15 | color: #9e9e9e; 16 | font-weight: 800; 17 | font-size: 18px; 18 | transition: 100ms ease; 19 | 20 | &:hover { 21 | opacity: 0.7; 22 | } 23 | } 24 | 25 | // Header 26 | > h1 { 27 | font-size: 44px; 28 | font-weight: bold; 29 | line-height: 1.2; 30 | margin: 1rem; 31 | color: #107cf1; 32 | } 33 | 34 | > p { 35 | font-size: 18px; 36 | color: rgb(113, 113, 113); 37 | line-height: 1.5; 38 | margin: 1rem; 39 | } 40 | 41 | > button { 42 | min-width: 150px; 43 | font-weight: 500; 44 | border-radius: 12px; 45 | padding: 1rem; 46 | margin: 0px 1rem; 47 | font-size: 16px; 48 | border: 1px solid rgb(255, 255, 255); 49 | color: rgb(0, 93, 194); 50 | background-color: rgb(186, 206, 255); 51 | 52 | &:disabled { 53 | opacity: 0.5; 54 | border-color: rgb(255, 255, 255); 55 | cursor: not-allowed; 56 | } 57 | } 58 | } 59 | 60 | // Responsive 61 | @media screen and (max-width: 728px) { 62 | .home { 63 | padding: 1rem; 64 | } 65 | } 66 | -------------------------------------------------------------------------------- /frontend/tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "target": "es5", 4 | "lib": ["dom", "dom.iterable", "esnext"], 5 | "allowJs": true, 6 | "skipLibCheck": true, 7 | "strict": true, 8 | "forceConsistentCasingInFileNames": true, 9 | "noEmit": true, 10 | "esModuleInterop": true, 11 | "module": "esnext", 12 | "moduleResolution": "node", 13 | "resolveJsonModule": true, 14 | "isolatedModules": true, 15 | "jsx": "preserve", 16 | "baseUrl": "./", 17 | "incremental": true 18 | }, 19 | "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"], 20 | "exclude": ["node_modules"] 21 | } 22 | -------------------------------------------------------------------------------- /generator/.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": ["airbnb", "plugin:prettier/recommended"], 3 | "env": { 4 | "browser": true, 5 | "commonjs": true, 6 | "es6": true, 7 | "jest": true, 8 | "node": true 9 | }, 10 | "rules": { 11 | "max-len": [ 12 | "warn", 13 | { 14 | "code": 120, 15 | "tabWidth": 2, 16 | "comments": 120, 17 | "ignoreComments": false, 18 | "ignoreTrailingComments": true, 19 | "ignoreUrls": true, 20 | "ignoreStrings": true, 21 | "ignoreTemplateLiterals": true, 22 | "ignoreRegExpLiterals": true 23 | } 24 | ] 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /generator/.prettierrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "printWidth": 80, 3 | "singleQuote": false, 4 | "trailingComma": "none" 5 | } -------------------------------------------------------------------------------- /generator/README.md: -------------------------------------------------------------------------------- 1 | # Generator 2 | 3 | Given a `decimals` count for a token and list of airdrop recipients, outputs: 4 | 5 | 1. A merkle root for use in a MerkleClaimERC20 contract 6 | 2. A merkle tree for use in a front-end 7 | 8 | ## Run locally 9 | 10 | ```bash 11 | # Navigate to generator directory, if not already there 12 | cd generator/ 13 | 14 | # Install dependencies 15 | npm install 16 | 17 | # Edit config.json 18 | vim config.json 19 | 20 | # Run script 21 | npm run start 22 | ``` 23 | 24 | Outputs a `merkle.json`, in the following format: 25 | 26 | ```json 27 | { 28 | "root": "0x6a0b89fc219e9e72ad683e00d9c152532ec8e5c559600e04160d310936400a00", 29 | "tree": { 30 | "duplicateOdd": false, 31 | "hashLeaves": false, 32 | "isBitcoinTree": false, 33 | "leaves": [ 34 | ... 35 | ], 36 | "layers": [ 37 | [...], 38 | [...] 39 | ], 40 | "sortLeaves": false, 41 | "sortPairs": true, 42 | "sort": false, 43 | "fillDefaultHash": null 44 | } 45 | } 46 | ``` 47 | -------------------------------------------------------------------------------- /generator/config.json: -------------------------------------------------------------------------------- 1 | { 2 | "decimals": 18, 3 | "airdrop": { 4 | "0x016C8780e5ccB32E5CAA342a926794cE64d9C364": 10, 5 | "0x185a4dc360ce69bdccee33b3784b0282f7961aea": 100 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /generator/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "generator", 3 | "version": "1.0.0", 4 | "description": "Script to generate Merkle tree root from inputs", 5 | "scripts": { 6 | "start": "ts-node src/app.ts" 7 | }, 8 | "author": "Anish Agnihotri", 9 | "license": "AGPL-3.0-only", 10 | "keywords": [ 11 | "merkle", 12 | "root", 13 | "generator" 14 | ], 15 | "devDependencies": { 16 | "@types/node": "^17.0.5", 17 | "eslint-config-airbnb": "^19.0.4", 18 | "eslint-config-prettier": "^8.3.0", 19 | "eslint-plugin-import": "^2.25.3", 20 | "prettier": "^2.5.1", 21 | "ts-node": "^10.4.0", 22 | "typescript": "^4.5.4" 23 | }, 24 | "dependencies": { 25 | "ethers": "^5.5.2", 26 | "keccak256": "^1.0.6", 27 | "merkletreejs": "^0.2.27", 28 | "winston": "^3.3.3" 29 | } 30 | } 31 | -------------------------------------------------------------------------------- /generator/src/app.ts: -------------------------------------------------------------------------------- 1 | import fs from "fs"; // Filesystem 2 | import path from "path"; // Path routing 3 | import Generator from "./generator"; // Generator 4 | import { logger } from "./utils/logger"; // Logging 5 | 6 | // Config file path 7 | const configPath: string = path.join(__dirname, "../config.json"); 8 | 9 | /** 10 | * Throws error and exists process 11 | * @param {string} erorr to log 12 | */ 13 | function throwErrorAndExit(error: string): void { 14 | logger.error(error); 15 | process.exit(1); 16 | } 17 | 18 | (async () => { 19 | // Check if config exists 20 | if (!fs.existsSync(configPath)) { 21 | throwErrorAndExit("Missing config.json. Please add."); 22 | } 23 | 24 | // Read config 25 | const configFile: Buffer = await fs.readFileSync(configPath); 26 | const configData = JSON.parse(configFile.toString()); 27 | 28 | // Check if config contains airdrop key 29 | if (configData["airdrop"] === undefined) { 30 | throwErrorAndExit("Missing airdrop param in config. Please add."); 31 | } 32 | 33 | // Collect config 34 | const decimals: number = configData.decimals ?? 18; 35 | const airdrop: Record = configData.airdrop; 36 | 37 | // Initialize and call generator 38 | const generator = new Generator(decimals, airdrop); 39 | await generator.process(); 40 | })(); 41 | -------------------------------------------------------------------------------- /generator/src/generator.ts: -------------------------------------------------------------------------------- 1 | import fs from "fs"; // Filesystem 2 | import path from "path"; // Path 3 | import keccak256 from "keccak256"; // Keccak256 hashing 4 | import MerkleTree from "merkletreejs"; // MerkleTree.js 5 | import { logger } from "./utils/logger"; // Logging 6 | import { getAddress, parseUnits, solidityKeccak256 } from "ethers/lib/utils"; // Ethers utils 7 | 8 | // Output file path 9 | const outputPath: string = path.join(__dirname, "../merkle.json"); 10 | 11 | // Airdrop recipient addresses and scaled token values 12 | type AirdropRecipient = { 13 | // Recipient address 14 | address: string; 15 | // Scaled-to-decimals token value 16 | value: string; 17 | }; 18 | 19 | export default class Generator { 20 | // Airdrop recipients 21 | recipients: AirdropRecipient[] = []; 22 | 23 | /** 24 | * Setup generator 25 | * @param {number} decimals of token 26 | * @param {Record} airdrop address to token claim mapping 27 | */ 28 | constructor(decimals: number, airdrop: Record) { 29 | // For each airdrop entry 30 | for (const [address, tokens] of Object.entries(airdrop)) { 31 | // Push: 32 | this.recipients.push({ 33 | // Checksum address 34 | address: getAddress(address), 35 | // Scaled number of tokens claimable by recipient 36 | value: parseUnits(tokens.toString(), decimals).toString() 37 | }); 38 | } 39 | } 40 | 41 | /** 42 | * Generate Merkle Tree leaf from address and value 43 | * @param {string} address of airdrop claimee 44 | * @param {string} value of airdrop tokens to claimee 45 | * @returns {Buffer} Merkle Tree node 46 | */ 47 | generateLeaf(address: string, value: string): Buffer { 48 | return Buffer.from( 49 | // Hash in appropriate Merkle format 50 | solidityKeccak256(["address", "uint256"], [address, value]).slice(2), 51 | "hex" 52 | ); 53 | } 54 | 55 | async process(): Promise { 56 | logger.info("Generating Merkle tree."); 57 | 58 | // Generate merkle tree 59 | const merkleTree = new MerkleTree( 60 | // Generate leafs 61 | this.recipients.map(({ address, value }) => 62 | this.generateLeaf(address, value) 63 | ), 64 | // Hashing function 65 | keccak256, 66 | { sortPairs: true } 67 | ); 68 | 69 | // Collect and log merkle root 70 | const merkleRoot: string = merkleTree.getHexRoot(); 71 | logger.info(`Generated Merkle root: ${merkleRoot}`); 72 | 73 | // Collect and save merkle tree + root 74 | await fs.writeFileSync( 75 | // Output to merkle.json 76 | outputPath, 77 | // Root + full tree 78 | JSON.stringify({ 79 | root: merkleRoot, 80 | tree: merkleTree 81 | }) 82 | ); 83 | logger.info("Generated merkle tree and root saved to Merkle.json."); 84 | } 85 | } 86 | -------------------------------------------------------------------------------- /generator/src/utils/logger.ts: -------------------------------------------------------------------------------- 1 | import * as winston from "winston"; // Logging 2 | 3 | // Setup winston logger 4 | export const logger = winston.createLogger({ 5 | level: "info", 6 | // Simple line-by-line output 7 | format: winston.format.simple(), 8 | transports: [ 9 | // Print to console 10 | new winston.transports.Console(), 11 | // + Output to generator logfile 12 | new winston.transports.File({ filename: "generator.log" }) 13 | ] 14 | }); 15 | -------------------------------------------------------------------------------- /generator/tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "lib": ["es5", "es6", "esnext"], 4 | "target": "es5", 5 | "module": "commonjs", 6 | "moduleResolution": "node", 7 | "outDir": "./dist", 8 | "emitDecoratorMetadata": true, 9 | "experimentalDecorators": true, 10 | "sourceMap": true, 11 | "esModuleInterop": true, 12 | "strict": true 13 | } 14 | } 15 | --------------------------------------------------------------------------------