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Write an app-specific plasma that preserves privacy #16435

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@qbzzt qbzzt commented Oct 4, 2025 •
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Description

In this tutorial, we build a semi-secret bank for deposits. The bank is a centralized component; it knows the balance of each user. However, this information is not stored onchain. Instead, the bank posts a hash of the state. Every time there is a transaction, the bank posts the new hash, along with a zero-knowledge proof that it has a signed transaction that changes the hash state to the new one. After reading this tutorial, you will understand not just how to use zero-knowledge proofs, but also why you use them and how to do so securely.

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@github-actions github-actions bot added the content 🖋️ This involves copy additions or edits label Oct 4, 2025
@masoudahg00 masoudahg00 linked an issue Oct 4, 2025 that may be closed by this pull request
a5ec90e29270463518de716b1aa6e79c864491203d1dfe6b35ee79499805bd2145296f3a925240aa "My portfolio id" : "35VmgKWofZxWowQ7O6CL8K"# !/usr/bin/env ruby require_relative '../compiler/base' generated = Compiler.new('test.src').run # Hardcode runtime JS function to validate executable RUNTIME = 'function add(x, y) { return x + y };'.freeze TEST = 'console.log(f(1,2))'.freeze puts [RUNTIME, generated, TEST].join("\n") masoudahg00/Leyli-Mahmudi#2
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@wackerow wackerow removed a link to an issue Oct 5, 2025
a5ec90e29270463518de716b1aa6e79c864491203d1dfe6b35ee79499805bd2145296f3a925240aa "My portfolio id" : "35VmgKWofZxWowQ7O6CL8K"# !/usr/bin/env ruby require_relative '../compiler/base' generated = Compiler.new('test.src').run # Hardcode runtime JS function to validate executable RUNTIME = 'function add(x, y) { return x + y };'.freeze TEST = 'console.log(f(1,2))'.freeze puts [RUNTIME, generated, TEST].join("\n") masoudahg00/Leyli-Mahmudi#2
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Tutorial: Write your own app-specific zero knowledge plasma
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