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roadmap/content/private/roadmap_old/virtual-machines/overview.md

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Virtual Machines Overview
virtual machines
zero knowledge

Motivation

Logos seeks to use a privacy-first virtual machine for transaction execution. We believe this can only be acheived through zero-knowledge. The majority of current work in the field focuses more towards the aggregation and subsequent verification of transactions. This leads us to explore the researching and development of a privacy-first virtual machine.

LINK TO APPROPRIATE NETWORK REQUIREMENTS HERE

Educational Resources

  • primer on Zero Knowledge Virtual Machines - link

Implementations:

  • TinyRAM - link
  • CairoVM
  • zkSync
  • Hermes
  • MIDEN (Polygon)
  • RISC-0
    • RISC-0 Rust Starter Repository - link
    • targets RISC-V architecture
    • benefits:
      • a lot of languages already compile to RISC-V
    • negatives:
      • not optimized or EVM where most tooling exists currently

General Building Blocks of a ZK-VM

  • CPU
    • modeled with "execution trays"
  • RAM
    • overhead to look out for
      • range checks
      • bitwise operations
      • hashing
  • Specialized circuits
  • Recursion

Approaches

  • zk-WASM
  • zk-EVM
  • RISC-0
    • RISK-0 Rust Starter Repository - link
    • targets RISC-V architecture
    • benefits:
    • negatives:
      • not optimized or EVM where most tooling exists currently

General workstreams

  • bytecode compiler
  • zero-knowledge circuit design
  • opcode architecture (???)
  • engineering
  • required proof system
  • control flow
    • MAST (as used in MIDEN)

Roles