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sha256_cairo_goldilocks

A cairo implementation of sha256 for the goldilocks field

How to run with sandstorm and cairo

  • Tested for Cairo v0.10.3
  • Check description of sandstorm and make Goldilocks adjustments
  • Edit <your_cairo_venv>/lib/python3.9/site-packages/starkware/cairo/lang/instances.py for the builtins (e.g. for range_check decrease the number of instances to use common range_chek functions)
  • In case you get an error with cairo-compile for cairo v0.10.3 install correct version of typeguard: pip install typeguard==2.13.3

Results

(On test server)

7 hashes (each 80 bytes)

Goldilocks STARK_prime
Sandstorm commit 7524a9d 7524a9d
Layout all starknet
Max Memory about 274 GB 44 GB
Time 1634s 241s
Proof Size 808KB 271KB
Proof Security 39 bit
Steps (original) 148848 28562
Steps (total) 8388608 262144
Bitwise cells 109198 15598

Note that the number of steps is increased exponentially to accomodate the amount of bitwise cells and highly dependant on the layout.

Commands

Compile

cairo-compile main.cairo --prime 18446744069414584321 --output=main_compiled.json --proof_mode

Run

cairo-run --program=main_compiled.json --layout=all --print_output --trace_file trace.bin --memory_file memory.bin --min_steps 128 --proof_mode --print_info

Prove

cargo +nightly run -F parallel,asm -- --program main_compiled.json prove --trace trace.bin --memory memory.bin --output proof.bin