Test tracer on zkSync Local node

[Vladyslav Kotsiuba]

Running tests with npx hardhat --network zkLocalhost --vvvv and npx hardhat --network zkLocalhost --fulltrace had same result without any trace displayed. Also, tried code block trace enabled through hre.tracer.enabled = true/false, but had same result.

Here is my hardhat config, if it helps:

import "@nomicfoundation/hardhat-chai-matchers";
import "@nomicfoundation/hardhat-network-helpers";
import "@nomiclabs/hardhat-ethers";
import "@nomiclabs/hardhat-etherscan";
import "@nomiclabs/hardhat-solhint";
import "@typechain/ethers-v5";
import "@typechain/hardhat";
import "hardhat-gas-reporter";
import "hardhat-tracer";

import "@openzeppelin/hardhat-upgrades";

import "@matterlabs/hardhat-zksync-chai-matchers";
import "@matterlabs/hardhat-zksync-deploy";
import "@matterlabs/hardhat-zksync-solc";
import "@matterlabs/hardhat-zksync-upgradable";
import "@matterlabs/hardhat-zksync-verify";

import { HardhatUserConfig } from "hardhat/config";

import { envConfig } from "./config";

const config: HardhatUserConfig = {
  solidity: {
    version: "0.8.20",
  },
  zksolc: {
    version: "latest",
    settings: {},
  },
  networks: {
    hardhat: {
      zksync: false,
    },
    goerli: {
      url: `https://goerli.infura.io/v3/${envConfig.INFURA_API_KEY}`,
      zksync: false,
    },
    zkTestnet: {
      url: "https://testnet.era.zksync.dev",
      ethNetwork: "goerli",
      zksync: true,
      verifyURL:
        "https://zksync2-testnet-explorer.zksync.dev/contract_verification",
    },
    zkLocalhost: {
      url: "http://localhost:3050",
      ethNetwork: "hardhat",
      zksync: true,
    },
  },
  etherscan: {
    apiKey: envConfig.ETHERSCAN_API_KEY,
  },
  typechain: {
    outDir: "typechain",
    target: "ethers-v5",
  },
  gasReporter: {
    enabled: envConfig.GAS_REPORTER,
    currency: "USD",
    coinmarketcap: envConfig.COINMARKETCAP_API_KEY || "",
    excludeContracts: ["contracts/mocks/"],
  },
};

export default config;

[soham]

Looks like it uses a different VM than the standard EthereumJS's VM. Currently it'll be difficult to support zksync on the v2. I'm planning to work on v3 for the upcoming rethnet upgrade on hardhat, not sure if zksync would be supported by default but I can try to cover it.

For now you can maybe try using v1 of this plugin which should work if the zkLocalhost would support debug_traceTransaction. npm i hardhat-tracer@1 --save-dev

[Vladyslav Kotsiuba]

@zemse Thank you, will try it soon