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I’m designing a proof-of-work blockchain where the hashing challenge is built around compressed .zip datasets. Each block will include a small table file that points to a specific archive stored on our site. Miners must decompress, run a SHA-based routine across the file’s contents, and submit the resulting digest. When their digest matches the target, they unlock an encrypted payload that can be redeemed for real-world merchandise—think limited-run art prints, gadgets, or apparel shipped directly to the winner. Here’s what I need from you: • A lightweight blockchain prototype (command-line or web-based) that generates these SHA puzzles from rotating .zip libraries • A miner client that automates download, decompression, digest calculation, and block submission • A reward module that verifies the winning hash and triggers a redemption token tied to our fulfilment API • Clear documentation so I can expand the archive list and merchandise catalogue without touching core code Acceptance criteria: 1. Block generation, validation, and chain sync function reliably on at least two networked nodes. 2. Mining client completes a full puzzle cycle in a single run and detects win conditions. 3. A successful hash yields a redemption token that passes a mock fulfilment request. Preferred stack is flexible—Go, Rust, or Python are all fine as long as the SHA implementation is native and efficient. If you’ve built custom proof-of-work or ZIP-centric utilities before, let’s talk.
Project ID: 40544861
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hi! there. i can build your sha based proof of work prototype with zip dataset mining, reward verification and a clean modular blockchain structure. one challenge is ensuring consistent hash validation across decompressed datasets without desync between nodes and another is keeping mining and block verification efficient while handling large zip archives but i can solve both using optimized sha routines and a lightweight network sync design. i focus on clear extensible architecture so you can expand archives and rewards easily without changing core logic.
$320 AUD in 5 days
2.9
2.9
32 freelancers are bidding on average $471 AUD for this job

With over 7 years of successful AI, data, and software development experience, my skill set is the perfect match for your unique project. I have a proven track record in API development with a strong emphasis on languages like Python, one of your preferred stacks. My work involves automating complex tasks and building efficient workflows - skills that are directly applicable to the development of your blockchain prototype, miner client, and reward module. Let’s connect
$500 AUD in 3 days
6.5
6.5

Hello There! I’m Md Toriqul Islam, and I’m excited to partner with you. I can dive into your project immediately. I have rich experience in blockchain development, distributed systems, and backend engineering. I am skilled in Python, Go, Rust, SHA-based cryptography, REST APIs, and scalable network architectures. I understand you need a proof-of-work blockchain prototype with ZIP-based mining challenges, automated miner clients, native SHA hashing, chain synchronization, and a reward redemption module integrated with your fulfillment workflow. I can build a modular, well-documented solution that is efficient, secure, and easy to extend as your platform grows. I’m ready to start immediately and would be happy to discuss the project. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$259 AUD in 3 days
6.2
6.2

Your concept of tying proof-of-work puzzles directly to compressed data for merchandise rewards is unique. I’ve built blockchain proofs-of-work before that involved custom data challenges and worked closely on automating miner clients that handle data fetching, processing, and submission in one go. For your prototype, I’d focus on building a simple networked chain maintaining consensus over rotating ZIP archives. The miner client will download, decompress, and run the SHA-based routine in a streamlined flow, then submit the block digest automatically. To ensure smooth reward claims, I’ll integrate a mock fulfillment API that triggers tokens only when the hash exactly matches the target. Two quick questions: Do you envision rotating ZIP archives being updated on a schedule, or manually added by you? Also, should the mining client support parallel processing across multiple archives, or stay single-threaded for simplicity? I’ll deliver working nodes syncing blocks, a miner that completes puzzles and detects wins reliably, plus clear docs so you can add archives and merchandise items without digging into the base code. Ready to get the prototype running and demonstrate the full cycle end to end.
$750 AUD in 7 days
5.9
5.9

I am 100% confident in building your ZIP-centric proof-of-work blockchain prototype. I specialize in cryptographic implementation and lightweight distributed architecture, and I can engineer an efficient mining client that handles .zip decompression, SHA-digest validation, and automated redemption token generation seamlessly. I will deliver a modular system where you can easily update your archive libraries and merchandise catalogues without modifying the core consensus logic. My implementation will ensure reliable block synchronization across nodes and secure, validated fulfilment triggers. Since the hashing routine involves decompressing files, are you prioritizing raw hashing speed by keeping the .zip files in a RAM-disk/buffer, or is the decompression overhead acceptable for your current network difficulty target?
$300 AUD in 1 day
5.9
5.9

I understand you need a lightweight, command-line blockchain prototype for your SHA mining algorithm where miners decompress .zip datasets, run a SHA-based routine, and submit a digest to unlock encrypted merchandise payloads. I recently developed a similar proof-of-work system for a gaming platform that involved custom data processing and reward distribution, resulting in a 20% increase in user engagement. My approach will involve building the core blockchain logic in Python, utilizing libraries like `zipfile` for decompression and `hashlib` for SHA computations. I'll implement a simple peer-to-peer networking layer using `socket` for block propagation and a basic key-value store (like SQLite) for managing the blockchain state and unspent transaction outputs. The command-line interface will guide miners through the process of fetching blocks, decompressing archives, and submitting their hashes. Could you clarify if the .zip datasets will be dynamically generated per block, or pre-existing and selected? Ready to start as soon as you confirm scope.
$649 AUD in 21 days
5.1
5.1

Hey, the part that jumps out is your SHA puzzle running over decompressed .zip contents. The catch is keeping decompression deterministic so every miner hashes the exact same bytes and digests actually match. I’d pin down the read order and normalize contents before hashing, then build the miner to do download, unzip, digest, and submit in one run. Two-node sync with a mock fulfilment token is workable in Go or Python. Are the archives locked once a block opens, or can they rotate mid-puzzle?
$250 AUD in 5 days
5.3
5.3

You want SHA puzzles tied to compressed zip archives and a redemption flow that mints a real world reward when someone finds a matching digest. That constraint around zipped datasets changes the usual PoW trade offs from raw compute to IO and deterministic decompression. The trick is making decompression and hashing deterministic and efficient across nodes while keeping block validation cheap for peers and secure for the reward unlock. I built the file integrity and redemption pipeline for Program Pro where native hashing routines and a tokenized fulfillment callback ensured downloadable assets were issued only after deterministic checks passed. My approach 1. Prototype node that produces blocks referencing a zip URL plus a small table file and target digest 2. Miner client that streams download, decompresses reliably, runs native SHA routine and submits candidate digest 3. Validation and chain sync between two nodes with deterministic rules and simple conflict resolution 4. Reward module that decrypts payload on successful match and issues a redemption token to your fulfillment API; include mock endpoint for testing 5. Docs and simple config so you can add archives and merchandise without changing core code Quick questions Are your archives hosted with range request support and what SHA variant do you prefer SHA256 or something else Please share a sample zip and the fulfillment API spec and I will draft an architecture diagram and a 48 hour prototype plan.
$500 AUD in 7 days
4.8
4.8

Nice to meet you , My name is Anthony Muñoz, I express my interest in working on your project after carefully reading the requirements and concluding that they match my area of knowledge and skills. I am currently the lead engineer for the IT agency DSPro and I have more than 10 years of experience in the field. I have successfully completed a large number of similar jobs and I consider your project to be a challenge in which I would like to work and be able to make it a reality. Please feel free to contact me, it will be my pleasure to help you. I greatly appreciate the time provided and I remain attentive to any questions or concerns. Greetings
$912 AUD in 7 days
4.9
4.9

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, Thank you for checking my proposal and sharing the detailed project brief. I can build your proof-of-work blockchain using either Go, Rust, or Python with a secure, efficient, and scalable design. I will deliver: • A lightweight blockchain prototype with SHA puzzles from rotating .zip libraries • A miner client for automated download, decompression, and block submission • A reward module for verifying winning hashes and triggering redemption tokens • Clear documentation for easy expansion of the archive list and merchandise catalogue You will also receive: • Guidance on managing and updating the archive list I am confident I can execute your vision professionally and efficiently. Looking forward to discussing the timeline and next steps. Best regards, Chirag.
$550 AUD in 7 days
4.4
4.4

Hi, Your concept is unique and technically interesting. I understand you're looking for more than a blockchain prototype—you need a complete proof-of-work workflow that combines SHA-based mining, ZIP dataset processing, network synchronization, and a secure merchandise redemption system. I can develop a modular solution with a lightweight blockchain, efficient mining client, reward verification, and a fulfillment API integration. The architecture will be clean, scalable, and well-documented, making it easy to add new ZIP libraries, mining rules, and merchandise without changing the core system. I'll focus on reliability, efficient hashing, secure validation, and maintainable code, with regular milestones and testing throughout development. I'd be happy to discuss the architecture and the best technology stack for long-term scalability. Best, Mateo
$500 AUD in 7 days
4.3
4.3

Hello! I've reviewed your project and I am genuinely excited to help you build this SHA mining algorithm and merchandise rewards blockchain prototype. I have experience with custom proof-of-work systems and can implement an efficient solution. My approach will use Python for the blockchain node and miner client, with a focus on native SHA implementation. I will handle block generation and validation, create a miner client that processes ZIP files, and implement the reward redemption system. The system will be designed so you can easily expand the archive list and merchandise catalogue. You can see examples of my work on my Freelancer profile at https://www.freelancer.com/u/cuyodigita.. Do you have a sample .zip library and merchandise catalogue ready for testing? Should the blockchain support multiple nodes or just a single node for the prototype? Let me know your answers. I can start right away. Ricardo
$500 AUD in 7 days
4.0
4.0

Hello. I understand you want to build a proof-of-work blockchain system where mining is based on SHA computation over compressed ZIP datasets, with a full cycle from block generation to mining client and reward redemption. I can design and build the core prototype including block generation, validation, and a simple peer-to-peer sync layer, plus a miner client that handles download, decompression, SHA processing, and submission. I can also implement the reward module that issues and verifies redemption tokens through a mock fulfillment API. I’ve worked on cryptography-based systems and custom blockchain prototypes, so I can keep the SHA logic native, efficient, and structured for future expansion. We should first define the block format and puzzle rotation logic before building the mining loop. Hope to work with you on this!
$300 AUD in 4 days
4.2
4.2

The zip-based hashing challenge is the interesting piece here. Building the challenge around compressed file contents changes how miners interact with the nonce space. I would build the SHA mining logic in Python or Rust, wire up the rewards API, and have a working testnet prototype ready in 4 days. Can start today. Treat the bid as an initial estimate. Once we walk through the full spec, the number may adjust. Want to jump on a quick call?
$450 AUD in 14 days
3.7
3.7

Lets chat, a free consultation and no obligation. I understand you need a clean, professional, and user-friendly solution for your "SHA Mining Algorithm, Merchandise Rewards" project. My skills in PHP, Java, JavaScript are a perfect fit for this project. While I am new to freelancer.com, my extensive experience delivers integrated, automated solutions. Regards, Jason McLachlan
$564 AUD in 3 days
3.0
3.0

As a seasoned professional with over 20 years experience, I am confident in my capabilities to build a lightweight and efficient blockchain prototype perfectly suited for your specific needs. My proficiency in C Programming, Cryptography, PHP and Python- including your preferred language- positions me to deliver a full-service project. PureCode has an established track record of transforming ideas into functional digital realities that are scalable and maintainable- exactly what your project requires. Moreover, I have prior experience working on building unique proof-of-work mechanisms as well as disentangling complex .zip files to guide block generation and validation reliably; translating the theory into impactful solutions. This shines a light on my ability to develop relevant and specialized software capabilities. In line with this, it would be crucial for you to receive comprehensive documentation; this is already a well-defined area of focus in our workflow which ensures future-proof capabilities for the project. Finally, my experience with government enterprises coupled with our long-term technical support and dedication to project management ensure that we'll meet your project goals and thrive during any challenges along the way. Let's partner together at PureCode and transform your ingenious idea of fun yet productive mining into an exceptional reality backed by resilient code!
$350 AUD in 5 days
2.5
2.5

⭐ Hi there ! Let's set meeting schedule for ur project more detail . Your main challenge is not only making a SHA miner run The tricky part is keeping block gen zip rotation digest check node sync and reward redemption clean without hard coding catalogue logic Built similar crypto style CLI flows where worker clients pulled files processed native hash routines submitted jobs to API and synced status across multiple nodes For ur POW prototype I can build lightweight chain logic miner cli zip download decompress SHA digest submit flow and mock fulfilment token flow Docs will be simple so u can add archive libs and merch items from cfg files later without touching core code Btw Python or Rust both fit this well imo Which part is already defined rn Target difficulty rule archive table format or fulfilment API req Timeline : 12 days Total Budget : 650 AUD
$650 AUD in 12 days
2.4
2.4

Hi there, I just read your posting. It sounds like you need an experienced software engineer who can help build, improve, and maintain a reliable solution using C Programming, Software Architecture, Cryptography, Blockchain, Rust, API Development, PHP and Python. I am a software engineer with 12+ years of experience designing and developing web, cloud, automation, and enterprise applications. I specialize in building scalable, maintainable, and production-ready solutions while ensuring high code quality, performance, security, and long-term stability. I can help review your requirements, identify the most effective technical approach, and implement the solution professionally. Whether the work involves backend development, frontend development, API integrations, cloud infrastructure, databases, automation, AI solutions, troubleshooting, performance optimization, or system architecture, I can help deliver the project successfully. I focus on clear communication, clean code, and practical solutions that align with business goals. My objective is not only to complete the immediate task but also to create a solution that is easy to maintain and extend in the future. Let me know if my profile looks interesting, and we can set up a time to talk. Best regards, Elijah M.
$700 AUD in 6 days
1.0
1.0

Hello, I would love to help. I understand what you need and will focus on quality results while keeping you updated. I am an expert with 10 years of experience in PHP, Python, C Programming and I helped many clients reach their goals. Visit my profile to check my latest work and reviews from past clients. I would love to connect in chat to discuss details. Best regards, Nathan Wilkins
$500 AUD in 7 days
0.0
0.0

Hi, I hope you're doing well. I have carefully reviewed your project, SHA Mining Algorithm, Merchandise Rewards, and I'm confident I can deliver a high quality solution tailored to your requirements. I'm a Full Stack Developer with 5+ years of experience building websites, SaaS platforms, AI powered applications, automation tools, web scrapers, lead generation systems, and custom software. I focus on delivering reliable, high quality solutions that meet business objectives while maintaining accuracy, performance, and scalability. I'd be happy to discuss your project in more detail and recommend the best approach before we get started. I look forward to working with you. Best regards, Adnan Hussain Full Stack Developer | Technical Fixes | AI Automation | Lead Generation & Extraction Expert | Websites Dev
$250 AUD in 7 days
0.0
0.0

Hello, How are you? I am very happy to bid on this interesting project. Also I am glad to inform you that I have relevant strong experience in [] and have worked on many similar projects before. I can start immediately and you'll be satisfied with my result. I'm always waiting for your reply. Regards!
$250 AUD in 4 days
0.0
0.0

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