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Running the application

This document covers common scenarios of launching zkSync applications set locally.

Prerequisites

Prepare dev environment prerequisites: see

Installing dependencies

Setup local dev environment

Setup:

zk # installs and builds zk itself
zk init

If you face any other problems with the zk init command, go to the Troubleshooting section at the end of this file. There are solutions for some common error cases.

To completely reset the dev environment:

  • Stop services:

    zk down

  • Repeat the setup procedure above

If zk init has already been executed, and now you only need to start docker containers (e.g. after reboot), simply launch:

zk up

(Re)deploy db and contracts

zk contract redeploy

Environment configurations

Env config files are held in etc/env/

List configurations:

zk env

Switch between configurations:

zk env <ENV_NAME>

Default configuration is dev.env, which is generated automatically from dev.env.example during zk init command execution.

Build and run server

Run server:

zk server

Server is configured using env files in ./etc/env directory. After the first initialization, file ./etc/env/dev.envwill be created. By default, this file is copied from the ./etc/env/dev.env.example template.

Make sure you have environment variables set right, you can check it by running: zk env. You should see * dev in output.

Running server using Google cloud storage object store instead of default In memory store

Get the service_account.json file containing the GCP credentials from kubernetes secret for relevant environment(stage2/ testnet2) add that file to the default location ~/gcloud/service_account.json or update object_store.toml with the file location

zk server

Running prover server

Running on machine without GPU

zk f cargo +nightly run --release --bin zksync_prover

Running on machine with GPU

zk f cargo +nightly run --features gpu --release --bin zksync_prover

Running the verification key generator

# ensure that the setup_2^26.key in the current directory, the file can be download from  https://storage.googleapis.com/matterlabs-setup-keys-us/setup-keys/setup_2\^26.key

# To generate all verification keys
cargo run --release --bin zksync_verification_key_generator

Generating binary verification keys for existing json verification keys

cargo run --release --bin zksync_json_to_binary_vk_converter -- -o /path/to/output-binary-vk

Generating commitment for existing verification keys

cargo run --release --bin zksync_commitment_generator

Running the contract verifier

# To process fixed number of jobs
cargo run --release --bin zksync_contract_verifier -- --jobs-number X

# To run until manual exit
zk contract_verifier

Troubleshooting

SSL error: certificate verify failed

Problem. zk init fails with the following error:

Initializing download: https://storage.googleapis.com/matterlabs-setup-keys-us/setup-keys/setup_2%5E20.key
SSL error: certificate verify failed

Solution. Make sure that the version of axel on your computer is 2.17.10 or higher.

rmSync is not a function

Problem. zk init fails with the following error:

fs_1.default.rmSync is not a function

Solution. Make sure that the version of node.js installed on your computer is 14.14.0 or higher.

Invalid bytecode: ()

Problem. zk init fails with an error similar to:

Running `target/release/zksync_server --genesis`
2023-04-05T14:23:40.291277Z  INFO zksync_core::genesis: running regenesis
thread 'main' panicked at 'Invalid bytecode: ()', core/lib/utils/src/bytecode.rs:159:10
stack backtrace:
   0:        0x104551410 - std::backtrace_rs::backtrace::libunwind::trace::hf9c5171f212b04e2
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:        0x104551410 - std::backtrace_rs::backtrace::trace_unsynchronized::h179003f6ec753118
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:        0x104551410 - std::sys_common::backtrace::_print_fmt::h92d38f701cf42b17
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:65:5
   3:        0x104551410 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb33e6e8152f78c95
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:44:22
   4:        0x10456cdb0 - core::fmt::write::hd33da007f7a27e39
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/fmt/mod.rs:1208:17
   5:        0x10454b41c - std::io::Write::write_fmt::h7edc10723862001e
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/io/mod.rs:1682:15
   6:        0x104551224 - std::sys_common::backtrace::_print::h5e00f05f436af01f
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:47:5
   7:        0x104551224 - std::sys_common::backtrace::print::h895ee35b3f17b334
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:34:9
   8:        0x104552d84 - std::panicking::default_hook::{{closure}}::h3b7ee083edc2ea3e
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:267:22
   9:        0x104552adc - std::panicking::default_hook::h4e7c2c28eba716f5
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:286:9
  10:        0x1045533a8 - std::panicking::rust_panic_with_hook::h1672176227032c45
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:688:13
  11:        0x1045531c8 - std::panicking::begin_panic_handler::{{closure}}::h0b2d072f9624d32e
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:579:13
  12:        0x104551878 - std::sys_common::backtrace::__rust_end_short_backtrace::he9abda779115b93c
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:137:18
  13:        0x104552f24 - rust_begin_unwind
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:575:5
  14:        0x1045f89c0 - core::panicking::panic_fmt::h23ae44661fec0889
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/panicking.rs:64:14
  15:        0x1045f8ce0 - core::result::unwrap_failed::h414a6cbb12b1e143
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/result.rs:1791:5
  16:        0x103f79a30 - zksync_utils::bytecode::hash_bytecode::h397dd7c5b6202bf4
  17:        0x103e47e78 - zksync_contracts::BaseSystemContracts::load_from_disk::h0e2da8f63292ac46
  18:        0x102d885a0 - zksync_core::genesis::ensure_genesis_state::{{closure}}::h5143873f2c337e11
  19:        0x102d7dee0 - zksync_core::genesis_init::{{closure}}::h4e94f3d4ad984788
  20:        0x102d9c048 - zksync_server::main::{{closure}}::h3fe943a3627d31e1
  21:        0x102d966f8 - tokio::runtime::park::CachedParkThread::block_on::h2f2fdf7edaf08470
  22:        0x102df0dd4 - tokio::runtime::runtime::Runtime::block_on::h1fd1d83272a23194
  23:        0x102e21470 - zksync_server::main::h500621fd4d160768
  24:        0x102d328f0 - std::sys_common::backtrace::__rust_begin_short_backtrace::h52973e519e2e8a0d
  25:        0x102e08ea8 - std::rt::lang_start::{{closure}}::hbd395afe0ab3b799
  26:        0x10454508c - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::ha1c2447b9b665e13
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/ops/function.rs:606:13
  27:        0x10454508c - std::panicking::try::do_call::ha57d6d1e9532dc1f
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:483:40
  28:        0x10454508c - std::panicking::try::hca0526f287961ecd
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:447:19
  29:        0x10454508c - std::panic::catch_unwind::hdcaa7fa896e0496a
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panic.rs:137:14
  30:        0x10454508c - std::rt::lang_start_internal::{{closure}}::h142ec071d3766871
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/rt.rs:148:48
  31:        0x10454508c - std::panicking::try::do_call::h95f5e55d6f048978
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:483:40
  32:        0x10454508c - std::panicking::try::h0fa00e2f7b4a5c64
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:447:19
  33:        0x10454508c - std::panic::catch_unwind::h1765f149814d4d3e
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panic.rs:137:14
  34:        0x10454508c - std::rt::lang_start_internal::h00a235e820a7f01c
                               at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/rt.rs:148:20
  35:        0x102e21578 - _main
Error: Genesis is not needed (either Postgres DB or tree's Rocks DB is not empty)

Description. This means that your bytecode config file has an empty entry: "bytecode": "0x". This happens because your zksync-2-dev/etc/system-contracts/package.json's dependency on "@matterlabs/hardhat-zksync-solc" is outdated. We don't expect this error to happen as we've updated to latest version which fixes the problem.

Solution. Update your dependency and reinit:

yarn add -D @matterlabs/hardhat-zksync-solc # in the system-contracts folder
zk clean --all && zk init

On the run, it moved from:

    "@matterlabs/hardhat-zksync-solc": "^0.3.14-beta.3",

to:

    "@matterlabs/hardhat-zksync-solc": "^0.3.15",

Error: Bytecode length in 32-byte words must be odd

Problem. zk init fails with an error similar to:

Successfully generated Typechain artifacts!
Error: Error: Bytecode length in 32-byte words must be odd
    at hashL2Bytecode (/Users/emilluta/code/zksync-2-dev/contracts/zksync/src/utils.ts:29:15)
    at computeL2Create2Address (/Users/emilluta/code/zksync-2-dev/contracts/zksync/src/utils.ts:53:26)
    at /Users/emilluta/code/zksync-2-dev/contracts/zksync/src/compileAndDeployLibs.ts:50:63
    at step (/Users/emilluta/code/zksync-2-dev/contracts/zksync/src/compileAndDeployLibs.ts:33:23)
    at Object.next (/Users/emilluta/code/zksync-2-dev/contracts/zksync/src/compileAndDeployLibs.ts:14:53)
    at fulfilled (/Users/emilluta/code/zksync-2-dev/contracts/zksync/src/compileAndDeployLibs.ts:5:58)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed.
Exit code: 1
Command: /Users/emilluta/.nvm/versions/node/v16.19.1/bin/node
Arguments: /opt/homebrew/Cellar/yarn/1.22.19/libexec/lib/cli.js compile-and-deploy-libs
Directory: /Users/emilluta/code/zksync-2-dev/contracts/zksync
Output:

info Visit https://yarnpkg.com/en/docs/cli/workspace for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Error: Child process exited with code 1

Description. This means that your bytecode config file has an empty entry: "bytecode": "0x". This happens because your zksync-2-dev/contracts/zksync/package.json's dependency on "@matterlabs/hardhat-zksync-solc" is outdated. We don't expect this error to happen as we've updated to latest version which fixes the problem.

Solution. Update your dependency and reinit:

yarn add -D @matterlabs/hardhat-zksync-solc # in the system-contracts folder
zk clean --all && zk init

On the run, it moved from:

    "@matterlabs/hardhat-zksync-solc": "^0.3.14-beta.3",

to:

    "@matterlabs/hardhat-zksync-solc": "^0.3.15",