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This repository provides a docker-compose file to run a fully-functional, local development network for Ethereum with proof-of-stake enabled. This configuration uses Prysm as a consensus client and geth / erigon for execution. It starts from proof-of-stake and does not go through the Ethereum merge.

This sets up a single node development network with 64 deterministically-generated validator keys to drive the creation of blocks in an Ethereum proof-of-stake chain.

The development net is fully functional and allows for the deployment of smart contracts and all the features that also come with the Prysm consensus client such as its rich set of APIs for retrieving data from the blockchain. This development net is a great way to understand the internals of Ethereum proof-of-stake and to mess around with the different settings that make the system possible.

Running the devnet

First, checkout this repository and install docker. Then run:

docker compose up -d

You will see the following:

$ docker compose up -d
[+] Running 7/7
[+] Running 10/10
 ✔ Container eth-pos-devnet-create-beacon-chain-genesis-1  Exited
 ✔ Container eth-pos-devnet-create-beacon-node-keys-1      Exited
 ✔ Container eth-pos-devnet-beacon-chain-2-1               Started
 ✔ Container eth-pos-devnet-beacon-chain-1-1               Started
 ✔ Container eth-pos-devnet-geth-genesis-1                 Exited
 ✔ Container eth-pos-devnet-geth-import-1                  Exited
 ✔ Container eth-pos-devnet-erigon-genesis-1               Started
 ✔ Container eth-pos-devnet-validator-1                    Started
 ✔ Container eth-pos-devnet-erigon-1                       Started
 ✔ Container eth-pos-devnet-geth-1                         Started

To stop the containers you can run docker compose stop. Each time you restart, you can wipe the old data using make clean

Next, you can inspect the logs of the different services launched

docker logs eth-pos-devnet-geth-1 -f

Available Features

  • Starts from the Capella Ethereum hard fork
  • The network launches with a Validator Deposit Contract deployed at address 0x4242424242424242424242424242424242424242. This can be used to onboard new validators into the network by depositing 32 ETH into the contract
  • The default account used in the go-ethereum node is address 0x85da99c8a7c2c95964c8efd687e95e632fc533d6 which comes seeded with ETH for use in the network. This can be used to send transactions, deploy contracts, and more
  • The default account, 0x85da99c8a7c2c95964c8efd687e95e632fc533d6 is also set as the fee recipient for transaction fees proposed validators in Prysm. This address will be receiving the fees of all proposer activity
  • The go-ethereum JSON-RPC API is available at http://geth:8545
  • The Prysm client's REST APIs are available at http://beacon-chain:3500. For more info on what these APIs are, see here
  • The Prysm client also exposes a gRPC API at http://beacon-chain:4000

Type 1 Prover Testing Procedure

The intent of this repo is to be able to test Erigon State Witnesses against the Type-1 Prover. Using this devnet setup, here is a procedure for creating some test data.

  1. Start the devnet up with docker compose up. If you've run previously, you might want to do a make clean to avoid running from a previous state.
  2. Wait for blocks to start being produced. This should only take a few seconds. You can use polycli monitor to quickly check that blocks are being created.
  3. Generate some load and test transactions. Use polycli or some other tool to create transactions.
  4. Once the load is done, you can stop the devnet with docker compose stop if you ran in detached mode.
  5. Checkout and build jerrigon from the feat/zero branch. You can use make all to build everything.
  6. Create a copy of the erigon state directory to avoid corrupting things
sudo cp -r execution/erigon/ execution/erigon.bak
sudo chown -R $USER:$USER execution/erigon.bak/
  1. Now we can start the Jerrigon fork of Erigon. This will give us RPC access to the state that we created in the previous steps.
~/code/jerrigon/build/bin/erigon \
    --http \
    --http.api=eth,net,web3,erigon,engine,debug \
    --http.addr=0.0.0.0 \
    --http.corsdomain=* \
    --http.vhosts any \
    --ws \
    --nodiscover=true \
    --txpool.disable=true \
    --no-downloader=true \
    --maxpeers 0 \
    --datadir=./execution/erigon.bak
  1. With the RPC running we can retrieve the blocks, witnesses, and use zero-bin to parse them. In my test case, I generated about 240 blocks worth of data so I'm going to use seq 0 240 for generating ranges of block numbers for testing purposes
# Create a directory for storing the outputs
mkdir out

# Call the zeroTracer to get the traces
seq 0 240 | awk '{print "curl -o " sprintf("out/wit_%02d", $0) ".json -H '"'"'Content-Type: application/json'"'"' -d '"'"'{\"method\":\"debug_traceBlockByNumber\",\"params\":[\"" sprintf("0x%X", $0) "\", {\"tracer\": \"zeroTracer\"}],\"id\":1,\"jsonrpc\":\"2.0\"}'"'"' http://127.0.0.1:8545"}' | bash

# download the blocks (this assumes you have foundry/cast installed)
seq 0 240 | awk '{print "cast block --full -j " $0 " > out/block_" sprintf("%02d", $0) ".json"}' | bash
  1. At this point, we'll want to checkout and build zero-bin in order to test proof generation. Make sure to checkout that repo and run cargo build --release to compile the application for testing. The snippets below assume zero-bin has been checked out and compiled in $HOME/code/zero-bin. After compiling, the leader and rpc binaries will be created in the target/release folder.
# use zero-bin to convert witness formats. This is a basic test
seq 0 240 | awk '{print "~/code/zero-bin/target/release/rpc fetch --rpc-url http://127.0.0.1:8545 --block-number " $0 " > " sprintf("out/zero_%02d", $0) ".json" }' | bash

# use zero-bin to generate a proof for the genesis block
./leader --arithmetic 16..23 --byte-packing 9..21 --cpu 12..25 --keccak 14..20 --keccak-sponge 9..15 --logic 12..18 --memory 17..28 --runtime in-memory -n 1 jerigon --rpc-url http://127.0.0.1:8545 --block-number 1 --proof-output-path 1.json
seq 2 240 | awk '{print "./leader --arithmetic 16..23 --byte-packing 9..21 --cpu 12..25 --keccak 14..20 --keccak-sponge 9..15 --logic 12..18 --memory 17..28  --runtime in-memory -n 4 jerigon --rpc-url http://127.0.0.1:8545 --block-number " $1 " --proof-output-path " $1 ".json --previous-proof " ($1 - 1) ".json"}'

Operational Notes

  • Pay attention to memory usage on the system running zero-bin. Certain transactions can consume a lot of memory and lead to an OOM.
  • You'll want to run zero-bin on a system with at least 32GB of RAM.
  • When you run zero-bin, a local file will be created with a name like prover_state_*. This file needs to be deleted if any of the circuit sizes are changed.
  • There is a useful script in zero-bin to run a range of proofs.

Both the state witness generation and the decoding logic are actively being improved. We expect that the following transaction types / use-cases should prove without issue:

  • Empty blocks (important use case)
  • EOA transfers
  • ERC-20 mints & transfers
  • ERC-721 mintes & transfers

Short Cuts

This is a shortcut to create the genesis file allocations for our mnemonic. This has already been hard coded into the genesis file, but if you want to use a different testing account, you can use this.

polycli wallet inspect --mnemonic "code code code code code code code code code code code quality" | jq '.Addresses[] | {"key": .ETHAddress, "value": { "balance": "0x21e19e0c9bab2400000"}}' | jq -s 'from_entries'