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    110 web3js công việc được tìm thấy, giá theo USD

    I have some issues need to be fixed asap in my NFT project. My developer had developed it few months ago, and he is not available now. So I'm looking for a full-stack blockchain developer who can fix the issues asap. The ideal candidate should have a solid understanding about NFT, real estate, and contract. This is my website link: Read carefully the attached file for your information. If you're confident with this project, please feel free to apply.

    $148 (Avg Bid)
    $148 Giá đặt trung bình
    33 lượt đặt giá

    Javascript expert with NodeJS, Web3, and Ethereum experience. Need Strong skills with web3, getting balances, sending transactions, interacting with erc-20 contracts, and other advanced web3js functions.

    $27 (Avg Bid)
    $27 Giá đặt trung bình
    18 lượt đặt giá
    Developer indonesia Đã kết thúc left

    I am in need of a Full-stack Developer based in Indonesia in magelang and speaks proper english. The ideal candidate should be proficient in the following programming languages, frameworks and libraries: - Javascript - Typescript - React - Nextjs - Web3js Key Skills and Experience: - Strong knowledge and experience in both front-end and back-end development - Proficiency in Javascript and Typescript - Experience in working with React and Nextjs - Familiarity with Web3js and blockchain development - Ability to work independently and meet project deadlines - Good communication skills and ability to collaborate with a team.

    $7 - $14 / hr
    Niêm phong
    $7 - $14 / hr
    21 lượt đặt giá
    Claim Airdrop Page -- 2 Đã kết thúc left

    Implement a airdrop claim page. Airdrop logic - There are some wallet address in our database, all ...Merkle proofs. 4. Write the function for allowing whitelisted addresses to claim their airdrops. This function should take the user's address, verify that it is in the whitelist using the Merkle proof, and transfer the airdropped tokens to the user's account. 5. Test the airdrop contract using a test suite or by deploying it to a test net. 6. Integrate the airdrop contract with the frontend using web3js or ethers library 7. Test the frontend integration by verifying that users can successfully claim their airdrops and that unauthorized addresses are prevented from claiming them. Careful testing and error handling is crucial to ensuring that the frontend integration i...

    $22 / hr (Avg Bid)
    $22 / hr Giá đặt trung bình
    27 lượt đặt giá

    need to connect the front end to the smart contract. web3js or etherjs

    $5 / hr (Avg Bid)
    $5 / hr Giá đặt trung bình
    12 lượt đặt giá
    DEX Arbitrage Trading Đã kết thúc left

    ...looking for assistance about search/find arbitrage opportunities, finding consistent tradeable token pairs and paths, so we can feed our bot and/or contract and see better results. Could be a function on nodejs that returns a json result (we will provide the json format). Code must be written in nodejs typescript file, you can query solidity contracts if you need extra data from blockchain, using web3js only Payment terms: no upfront, no crypto payments, only freelance escrow. 100% Escrow will be released upon successful tradeable token paths found that are net positive. Please bid your final price. We will not honor attempts to increase price through chat. Also, I'd like to know if you've done this before and the approach you would take to do what is needed. *T...

    $548 (Avg Bid)
    $548 Giá đặt trung bình
    22 lượt đặt giá

    Hello, I need a website created NO TEMPLATES, modern design with registration system, profile management, gallery, forum, market, mediabal game environment, navigation carousel on the web news, compatible with smartphone, web3js compatibility, start of google section, wallet and mail. I make it very clear that I do NOT want templates, the chosen person who uses the template will be immediately rejected

    $558 (Avg Bid)
    $558 Giá đặt trung bình
    112 lượt đặt giá

    We have set up a Solana Pay demo on our Linux Centos 8 server. For your reference, the source code for the demo basically consists of React, Web3js, and Typescript and can be downloaded at the following github repo: We are experiencing CORS errors when testing the demo on our server: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at ... (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 403. TypeError: NetworkError when attempting to fetch resource. :25 CORS Missing Allow Origin It will help if you have experience as a Linux System Admin. We will provide access to our server where we'd like you to troubleshoot the cause of the

    $74 (Avg Bid)
    $74 Giá đặt trung bình
    6 lượt đặt giá

    ...id=Ym94LW9mLWNvb2tpZXM9MCZiYXNrZXQtb2YtY29va2llcz0wJmNvdW50cnk9RnJhbmNl and then the encrypted variables should be decoded/decrypted and made available for use within So I would have the option to load either the standard url or encoded/encrypted url and in both cases the variables would be made available inside The source code for the demo basically consists of React, Web3js, and Typescript and can be downloaded at the following github repo: You don't need to complete or set up the entire tutorial and can ignore the "Loyalty Scheme" last section. By copying the full source code examples in the tutorial, you can quickly set it up in about 15-20 minutes. You can download the Phantom wallet at https://phantom

    $52 (Avg Bid)
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    12 lượt đặt giá

    ...app/checkout?box-of-cookies=1&basket-of-cookies=0 What I'd like to do is to be able to load up the following url instead: and to be able to grab the "country=France" variable and to make it available for use within the file. The source code for the demo basically consists of React, Web3js, and Typescript and can be downloaded at the following github repo: You don't need to complete or set up the entire tutorial and can ignore the "Loyalty Scheme" last section. By copying the full source code examples in the tutorial, you can quickly set it up in about 15-20 minutes. You can download the Phantom wallet at https://phantom

    $60 (Avg Bid)
    $60 Giá đặt trung bình
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    BEFORE BIDDING PLEASE READ: 1. ONCE BID AMOUNT IS PLACED will not accept a different under any circumstances - So please Bid Carefully. Web3Js built website Player can select any wining combination that player feels will win on the website ( no use of metamask required) 1. Player can register their account and 2FA required during registration for accessing all features ( login /withdraw / change password / edit wallet address ( once per week), playing over a set limit in settings ... etc) 2. Integration with cryptocurrency wallets - Player deposits cryptocurrency in their own wallets and can use this balance to play on events and win / loose, Player can also withdraw to their pre registered withdrawal wallet account. 3. Support ticket feature - through a chat based system for ev...

    $446 (Avg Bid)
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    30 lượt đặt giá
    Web3js tranfer nfts Đã kết thúc left

    Necesito poder hacer transferencias de mis nfts de una waller a otra mediante web3js, por lo que primero será necesario hacer un aporoved y después la transferencia.

    $41 (Avg Bid)
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    Web3Js built website Player can select any wining combination that player feels will win on the website ( no use of metamask required) 1. Player can register their account and 2FA required during registration for accessing all features ( login /withdraw / change password / edit wallet address ( once per week), playing over a set limit in settings ... etc) 2. Integration with cryptocurrency wallets - Player deposits cryptocurrency in their own wallets and can use this balance to play on events and win / loose, Player can also withdraw to their pre registered withdrawal wallet account. 3. Support ticket feature - through a chat based system for every new ticket created. 4. Player can play on selecting winning numbers ( for all open games) or events created or placed by other player...

    $397 (Avg Bid)
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    28 lượt đặt giá
    Web3js flashloan bot Đã kết thúc left

    For the flashloan script implementation into you existing nodejs project I need 1 day and charge 150$

    $150 (Avg Bid)
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    1 lượt đặt giá
    Fixing Solidity Script Đã kết thúc left

    Transfer BUSD value through Binance Solidity Chain using web3js and MetaMask.

    $448 / hr (Avg Bid)
    $448 / hr Giá đặt trung bình
    16 lượt đặt giá

    Hello, Are you experienced with smart contract, solidity, web3js for DEX? If you are experienced with this, please bid here. I will discuss in more detail with the candidate freelancer. Thanks.

    $30 - $250
    Niêm phong
    $30 - $250
    15 lượt đặt giá
    Project for Edgars C. Đã kết thúc left

    discusson on chat https://www.freelancer.com/messages/thread/211857704?filter=active project https://www.freelancer.com/projects/web3js/Build-web-dapp?filter=active

    $50 (Avg Bid)
    $50 Giá đặt trung bình
    1 lượt đặt giá

    ... How LOTTOCryptoCoin works: The user will register and Login can be with google, facebook, Twitter,... The user can buy the LottoCryptoCoin payment with Paypal or Credit Card or any of the major Cryptocurrency The user enter his wallet address The user can connect his metamask on our website and buy LCC or swap with another major crypto like Bitcoin, Ethe, Solana,.. Binance, Web3js Value of LCC on coinmarketcap scraping “Selenium” or use coinmarketcap API Associate your play to your wallet address When player buy LCC he will receive it automatically to his wallet The user chose the Lotto numbers and pay with LCC The User can play as many times as he want The user can set for automatic participation each game or chose the date and he numbers he want to play Use th...

    $1327 (Avg Bid)
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    63 lượt đặt giá

    ... How LOTTOCryptoCoin works: The user will register and Login can be with google, facebook, Twitter,... The user can buy the LottoCryptoCoin payment with Paypal or Credit Card or any of the major Cryptocurrency The user enter his wallet address The user can connect his metamask on our website and buy LCC or swap with another major crypto like Bitcoin, Ethe, Solana,.. Binance, Web3js Value of LCC on coinmarketcap scraping “Selenium” or use coinmarketcap API Associate your play to your wallet address When player buy LCC he will receive it automatically to his wallet The user chose the Lotto numbers and pay with LCC The User can play as many times as he want The user can set for automatic participation each game or chose the date and he numbers he want to play Use th...

    $1686 (Avg Bid)
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    47 lượt đặt giá

    I need a senior blockchain developer with strong ReactJs, Web3Js and Solidity experience to build an enterprise dapp. The developer must have strong experience in React.js Solidity TypeScript REST API

    $533 (Avg Bid)
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    Project for Wei Sung L. -- 2 Đã kết thúc left

    The problems that leftover are: 1. Communication between react frontend and smart contracts. 2. Admin panel Smart contracts are working fine. Just the problem with the ethersjs / web3js We are using moralis as our wallet authentication.

    $250 (Avg Bid)
    $250 Giá đặt trung bình
    1 lượt đặt giá
    Web3JS Dapp Blockchain -- 2 Đã kết thúc left

    Betting Dapp connected with metamask, needs automatic creation of rooms when sending transactions + deletion of room when filling it with users and winner to choose + history of bets made

    $630 (Avg Bid)
    $630 Giá đặt trung bình
    22 lượt đặt giá

    I have a simple Javascript game and I want to deploy this on the blockchain, so that game components will be tokenized. Freelancer should have excellent knowledge on Solidity, ReactJS, ganache, truffle, nodejs, and web3js.

    $169 (Avg Bid)
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    ...empty (the $3.50 amount is not displayed). Clicking on the numerical keypad populates the "Total" field. I'd like for you to grab the "amount" from the url and pre-populate the "Total" field so that the $3.50 (or whatever value I decide to assign to amount) is displayed in the "Total" field when the url/page is initially loaded/rendered. The source code for the demo basically consists of React, Web3js, and Typescript and can be downloaded at the following github repo: Please make the appropriate modifications. You could read the "amount" query param from React Router and populate the state of the "Total" field. Or another way if easier. Do not repost or fork your solution back to github as this is a private pr...

    $21 (Avg Bid)
    $21 Giá đặt trung bình
    5 lượt đặt giá

    I need an abi that allows me to interact with a single function in web3js, but the contract does not have open source, I already managed to solve one of the parameters, but the function name and the second parameter are missing. Contract: Required function:

    $135 (Avg Bid)
    $135 Giá đặt trung bình
    9 lượt đặt giá

    Hi, Is about HTML website template to be build sign up functions web3js . Website contains : Template features: HTML5 & CSS3 Responsive Template XD files included Animate everything you want Free icons used Pixel Perfect Clean & Unique Design Easy to customize Retina Ready Unlimited Colors Home Page Services Page Service Detail Price List Parallax Effect & much more... CSS System contains 3 parts: Template style Shortcodes style Responsive style Javascript - Fonts - Animation - Bootstrap style

    $19 / hr (Avg Bid)
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    34 lượt đặt giá

    Rust / Solana Blockchai...years Hands on in Rust programming languages - Experience with Blockchain Technology on Fintech , Smart Contract , NFTs etc - In Depth understanding of at-least two blockchain network like Rust, Substrate, Polkadot Solana, Hedera - Ability to write security auditable Smart Contract / Programs on Solana Blockchain - Must able to work as full stack blockchain developer - rust, Solana , solidity , web3js , ethersJs , ReactJS , NPM - GitHub & Project Management knowledges will be bonus for the developer - Developer must well-structured APIs in Node.js and MongoDb to connect to Blockchain infrastructure - Experience in Wallets or Crypto Exchanges would be a major plus. Share your resumes and get ready for first round interview and introduction with your...

    $41 / hr (Avg Bid)
    $41 / hr Giá đặt trung bình
    13 lượt đặt giá
    React expert Needed -- 2 Đã kết thúc left

    This is the NFT marketplace website. All the design are finished on webflow, so the HTML, CSS, JavaScript files are ready. You can check the website here. I JUST WANT TO CONVERT THIS SITE TO REACT for the integration with blockchain and metamask wallet using web3js. If you are available, bid on me.

    $202 (Avg Bid)
    $202 Giá đặt trung bình
    13 lượt đặt giá

    Estoy buscando experto en web3, ethersJS, MERN para varios proyectos por iniciar, excelente dominio de implementaciones con blockchain

    $13 / hr (Avg Bid)
    $13 / hr Giá đặt trung bình
    48 lượt đặt giá
    Ethereum Wallet Sweeper Đã kết thúc left

    I have a wallet that when ether is sent to it i need it to automatically transfer into another wallet. NodeJS, Web3js, and to be used Infura, Etherscan

    $165 (Avg Bid)
    $165 Giá đặt trung bình
    14 lượt đặt giá

    Looking for NFT and Blockcha...admin section to enable blocking of any item that has bad data or that appears like a phishing scam. 11. Integrate payment to make it it possible to buy with credit/debit cards. 12. Integrate lazy minting /free gas minting. Additional Services for this project would be: • NFT smart contract • NFT Art Collection • NFT minting • NFT GAMES • Upload artworks onto IPFS • Wallet connection with Web3js • Token customization • Fork pancake swap • Swap / Liquidity • Farming / Staking • Pooling • Referral system • Presale / ICO • Develop NFT Random Art Generation and Minting Dapp. Demo Videos:

    $506 (Avg Bid)
    $506 Giá đặt trung bình
    30 lượt đặt giá
    Web3JS Dapp Blockchain Đã kết thúc left

    Design:Logo+web Dapp page web3JS BSC Metamask Deposit/Withdraw USDT to Dapp Randomness system (chainlink) History with schedule + cancellation of games

    $527 (Avg Bid)
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    I need someone who can transfer a solana token using web3js within a short amount of time Needed skills: Blockchain, Solana, smart contract, react, nodejs

    $164 (Avg Bid)
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    13 lượt đặt giá

    I have site using web3js. In there, I want to reduce time to take get request by using batch request in web3js.

    $30 (Avg Bid)
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    Hello, I am currently looking for a solidity / js developer who knows web3js to create a simple script in Javascript, who calls smart contrats to get pairs price on DEX (Pancakeswap, TraderJoe etc). A script where I can put my own RPC Node with web3. I could offer you lots of different jobs in the future.

    $535 (Avg Bid)
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    30 lượt đặt giá

    We have a DApp website Project, and today we present some problems with events subscriptions shows: RPC Error: Internal JSON-RPC error. {code: -32603, message: 'Internal JSON-RPC error.' Message: too many request.

    $20 (Avg Bid)
    $20 Giá đặt trung bình
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    Clone solana based dex Đã kết thúc left

    Wallet connection with Web3js Components and UI style like pancake, dont be exact the same Uniswap V3 protocol implementation Swap / Liquidity Farming / Staking Pooling Token customization Presale / ICO(can set descending/ascending) DAO/forum on third-party , snapshot To provide Website design API management Back/front end

    $3000 - $5000
    $3000 - $5000
    0 lượt đặt giá
    Swift - Web3j - Vietnamese only Đã kết thúc left

    Hi there. I am looking for a swift and web3js developer from Vietnam only. It is a long term project and flexible working time. (at last 4-5 hours/day) Prefer Hanoi city. Anyone there? Please contact me ASAP. Thanks.

    $20 / hr (Avg Bid)
    $20 / hr Giá đặt trung bình
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    React expert Needed Đã kết thúc left

    This is the NFT marketplace website. All the design are finished on webflow, so the HTML, CSS, JavaScript files are ready. You can check the website here. I JUST WANT TO CONVERT THIS SITE TO REACT for the integration with blockchain and metamask wallet using web3js. If you are available, bid on me.

    $131 (Avg Bid)
    $131 Giá đặt trung bình
    11 lượt đặt giá
    Backend work Đã kết thúc left

    need dev with the skill of web3js and nodejs for integrating smart contract in website

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    Hey freelancers We are looking for simple DAPP for Token Exchange , it will not simple to UniSwap A very simple DEX on Ethereum Test network We need very simple DEX with ReactJs , Web3Js and Smart Contract Deliverables - Sample ERC20 Smart Contract for two tokens - Solidity ERC Smart Contract for Swaping - Live Price calculation - ReactJS for Swap page - Web3JS connecting MetaMASK and perform swap transactions Let me know if you can handle this task Regards

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    Video Repository Main Site Youtube Discord Smart Contract...Umy8nA Discord Smart Contract - should be able to lookup their contract for the haslips and get from there 0x42ED4D26a0f3d1BcB88efFc13a51ed0E9Cbd4E45 Project Outline 1. Will need to use their code: haslips_art_engine copy and use my images as the new layers and tables for rarity 2. Web interface will need to use web3js to connect smartcontract and minting with new price 3. Will need to setup via IPFS to store the images

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    Fork Pancakeswap Đã kết thúc left

    I am looking for a team to fork pancakeswap using my own bep20 token. I want teams specialised in web3js, solidity, react.js and more. i'm looking to build a social network for crypto. 1. So, the social network has to avoid tracking at any cost, the only login we want is through Metamask. On project pages there have to be graphs and charts on one side of the sidebar, or i am available for discussion for the gui if you have any ideas. The projects have to have also a menu there where they can submit links to their socials, website, whitepaper etc. Logins and logouts only through Metamask or Walletconnect. Please check their API integration and also Wowonder. If you need wowonder files i can send them here. The platform has payment processors inside, but we dont want any of...

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    Blockchain developer need. Đã kết thúc left

    I have a project using solidity and web3js. It was worked well but now have a issue. If you are expert, you can fix it within an hour. thanks.

    $50 (Avg Bid)
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    Hope you are doing well I am looking for blockchain expert who help me. I have swap site. I want to add bridge feature on it. Looking forward to discuss more detail via chat.

    $25 / hr (Avg Bid)
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    Hi everyone I am looking for Smart Chain developer. Already Swap site have done. I want to add the bridge feature. UI is ready now. You might test it on the test net successfully and integrate with web3js . Good luck

    $920 (Avg Bid)
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    Im developing a NFT project, I have already done the smart contract and I also know how to use web3js for minting NFTs. The only thing that I need right now is the frontend and design for my NFTs website home page. This website should showcase some of the images of my NFTs (I will provide the images) and it should also describe my NFT project itself. I would like to have my NFT website similar to these ones: and So the home page of the website should contain a big image (which I will provide) on the main page along with a navigation bar. Then under that there should be some placeholder which will say something like "welcome to my nft project...". Under that there should be a placeholder for the roadmap of my NFT project. Another

    $15 / hr (Avg Bid)
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    We are developing a NFT project (base artwork and traits are currently being developed) We require someone to develop the following: 1. Develop ERC721 smart contract 2. Develop NFT mint website (Wallet connection with Web3js) 3. Upload artworks onto IPFS (Randomize traits) 4. Deploy smart contract 5. List project on OpenSea

    $1634 (Avg Bid)
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    I am looking for an experienced and professional dev with a track record in blockchain and erc20 projects such as exchanges. Must have skills in: - solidity - ERC20 - Ethereum - Exchanges - ReactJS - Web3 ** This job will need changes to Smart contract, Web3JS and web3 ** I require the following changes to the application: Group Orders together for same price - when user makes order for the same price as another order group them together in the order book. Match orders (Matching engine) - If user makes order for the same asking price as an order already in the order book = Match the order and fill it, if multiple orders are available for the same price, the orders must be filled earliest order fist. Partial Fill Orders - Allow user to fill part of an order a...

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    You must know what opensea is and have wide range of knowledge in Solidity , web3js and Node.js. If you are expert, please bid with "Expert"' at the first line of yours. I will test you in many fields and choose real talented guy. Good luck.

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