I am running a forked instance of Arbitrum using ganache like so:

ganache-cli --fork https://arb-mainnet.g.alchemy.com/v2/MYAPIKEY --db ./ganache-data -h 0.0.0.0 --chainId 42161 --mnemonic "my cool mnemonic"

I receive my prefunded wallets each with 100 ETH, but when I run any smart contracts on my forked instance, afterwards all of my ether balances on my funded accounts drop to 0.

Is this intended behavior or a bug?

Aug 21 '23 15:08 BarneyChambers

There is a bug when starting with an existing --db. It doesn't validate that the start up params given match the ones that created the db in the first place, the mnemonic you are giving it is likely different than the mnemonic that was given when the db was first initialized.

Another perspective of this bug: ganache should re-fund the mnemonic's accounts with 100 eth every time it starts up, but doesn't.

That's probably what is happening here.

Here is the issue: https://github.com/trufflesuite/ganache/issues/1030

Aug 21 '23 18:08 davidmurdoch

Thank you. I have rm -rf ./ganache-data but I am still having the issue. Are there any other config files etc I might need to try deleting to reset my ganache back to default?

Aug 22 '23 08:08 BarneyChambers

What version of ganache?

Aug 22 '23 12:08 davidmurdoch

Ganache CLI v6.12.2 (ganache-core: 2.13.2)

Aug 22 '23 12:08 BarneyChambers

Oh. Uninstall that. It's deprecated. Install ganache via npm install ganache -g

Aug 22 '23 12:08 davidmurdoch

Thanks, I updated to latest using npm install ganache -g and it seems that I am still having the issue after I delete my db folder, and make a fresh instance of my blockchain, after running a couple of scripts, it seems that my funded balances all go to 0

I am now using ganache v7.9.0 (@ganache/cli: 0.10.0, @ganache/core: 0.10.0)

Aug 22 '23 13:08 BarneyChambers

Can you paste the ganache output?

Aug 22 '23 15:08 davidmurdoch

ubuntu@ip-172-31-19-56:~$ ganache --fork https://arb-mainnet.g.alchemy.com/v2/xxxxxxxxxxxxxxx --db ./ganache-data -h 0.0.0.0 --chain.chainId 42161 --mnemonic "xxxxxxxxxxxx" --accounts=10 ganache v7.9.0 (@ganache/cli: 0.10.0, @ganache/core: 0.10.0) Starting RPC server eth_blockNumber

Available Accounts

(0) 0x828ad78d7F05A0EA9E6c2e6f50B4C8a38D0229A8 (1000 ETH) (1) 0x65Ec566142e97603Aa785A8C0C25A7C1303ae6c6 (1000 ETH) (2) 0xe9c6FB81bDCf8c19CEa349b465e1034545A0f381 (1000 ETH) (3) 0x80Ab02e017A7b1d27b64F2C0C7fC539D162F572a (1000 ETH) (4) 0x7Dfd66650F3D4121Db002Df0958B21678C3e398a (1000 ETH) (5) 0x10bd3Bf0Df6C5E256793976515103f452e237AcE (1000 ETH) (6) 0x0432b9f8CfF2e7B321ad91e6F6d258c0010cbA5F (1000 ETH) (7) 0xa7F4088D3f5A72B7dBE18Fd649a283ea7CD3a0b3 (1000 ETH) (8) 0x716f034B9D588A7073d44Da7c4401dAc9f2Cf848 (1000 ETH) (9) 0x9E00D0F6F27684673FAC974E38BDE71986BC0A3d (1000 ETH)

Private Keys

(0) xxxxxxxxxxxx (1) xxxxxxxxxxxx (2) xxxxxxxxxxxx (3) xxxxxxxxxxxx (4) xxxxxxxxxxxx (5) xxxxxxxxxxxx (6) xxxxxxxxxxxx (7) xxxxxxxxxxxx (8) xxxxxxxxxxxx (9) xxxxxxxxxxxx

HD Wallet

Mnemonic: xxxxxxxxxxxx Base HD Path: m/44'/60'/0'/0/{account_index}

Default Gas Price

2000000000

BlockGas Limit

30000000

Call Gas Limit

50000000

Forked Chain

Location: https://arb-mainnet.g.alchemy.com/v2/xxxxxxxxxxxxxxxxxxxxxxxxx Block: 123893240 Network ID: 42161 Time: Tue Aug 22 2023 14:54:20 GMT+0000 (Coordinated Universal Time)

Chain

Hardfork: shanghai Id: 42161

RPC Listening on 0.0.0.0:8545

Aug 22 '23 16:08 BarneyChambers

eth_call eth_blockNumber eth_blockNumber eth_blockNumber eth_blockNumber eth_blockNumber eth_blockNumber eth_blockNumber eth_chainId miner_stop miner_setEtherbase eth_blockNumber eth_coinbase miner_start eth_accounts eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_blockNumber eth_getBlockByNumber eth_call eth_blockNumber eth_call eth_call eth_blockNumber eth_blockNumber eth_blockNumber eth_call eth_call eth_blockNumber eth_blockNumber eth_blockNumber eth_blockNumber eth_chainId miner_stop miner_setEtherbase eth_coinbase miner_start eth_accounts eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_accounts eth_chainId miner_stop miner_setEtherbase eth_coinbase miner_start eth_accounts eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_blockNumber net_version eth_chainId miner_stop miner_setEtherbase eth_coinbase miner_start eth_accounts eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_getBalance eth_blockNumber net_version net_version eth_getBlockByNumber

Aug 22 '23 16:08 BarneyChambers

Hm, it seems that no transactions are being sent here. Can you provide a reproduction script?

Aug 22 '23 17:08 davidmurdoch

Sure, if I run these two scripts, afterwards I will lose my ETH in the funded accounts. For reference, I am using hardhat in typescript mode. The way to run these in hardhat is npx hardhat run scripts/theScriptYouWant --network arbitrumFork where arbitrumFork is one of the chains in my hardhat-config.ts that points to my ganache instance:

wrapETH.ts

import { ethers } from "hardhat";
//import "@uniswap/v3-periphery";


const main = async () => {
  const [owner, ...accounts] = await ethers.getSigners();

    console.log("owner address: ", owner.address);
    let WETHAddress = '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1';


    //wrap 50 ETH into WETH
    let WETH = new ethers.Contract(WETHAddress, ['function deposit() public payable'], owner);
    let depositTx = await WETH.deposit({value: ethers.utils.parseEther('50')});
    await depositTx.wait();

    console.log(`Wrapped ETH!`);
};

main()
  .then(() => process.exit(0))
  .catch((error: Error) => {
    console.error(error);
    process.exit(1);
  });

SwapETHForUSDC

import { ethers } from "hardhat";
//import "@uniswap/v3-periphery";
const main = async () => {
  const [owner, ...accounts] = await ethers.getSigners();

    console.log("owner address: ", owner.address);

    //define uniswap v3 router
    let uniswapV3RouterAddress = '0xe592427a0aece92de3edee1f18e0157c05861564';
    let usdcAddress ='0xff970a61a04b1ca14834a43f5de4533ebddb5cc8';
    let WETHAddress = '0x82af49447d8a07e3bd95bd0d56f35241523fbab1';

    let ExactInputSingleParams = {
        tokenIn: WETHAddress,
        tokenOut: usdcAddress,
        fee: 500,
        recipient: owner.address,
        deadline: 1913450590, //2030
        amountIn: ethers.utils.parseEther('50'),
        amountOutMinimum: 65000000000, //65k
        sqrtPriceLimitX96: 0
    }


    console.log('approving...');
    //approve uniswap v3 router to spend WETH
    let WETH = new ethers.Contract(WETHAddress, ['function approve(address spender, uint256 amount) public returns (bool)'], owner);
    let approveTx = await WETH.approve(uniswapV3RouterAddress, ethers.utils.parseEther('50'));
    await approveTx.wait();

    console.log('swapping...');
    let uniswapV3Router = await ethers.getContractAt('ISwapRouter', uniswapV3RouterAddress);
    let swapTx = await uniswapV3Router.exactInputSingle(ExactInputSingleParams);
    await swapTx.wait();
    console.log(`Swapped 50 ETH for USDC!`);
};

main()
  .then(() => process.exit(0))
  .catch((error: Error) => {
    console.error(error);
    process.exit(1);
  });

Aug 22 '23 20:08 BarneyChambers

I haven't run this yet, but are you sure your hardhat mnemonic matches your ganache mnemonic? And that the accounts they are using are the same (your logged "owner address" should match the first account in ganache's list).

Aug 22 '23 21:08 davidmurdoch

Yes I am 100% sure they are the same

Aug 23 '23 08:08 BarneyChambers

I have made a video reproducing the issue:

https://youtu.be/8EM-ewLYdK4

Aug 23 '23 09:08 BarneyChambers

And here are the logs for that video:

eth_blockNumber eth_call eth_call eth_call eth_blockNumber eth_blockNumber eth_call eth_call eth_blockNumber eth_blockNumber eth_blockNumber eth_chainId eth_chainId eth_chainId eth_accounts eth_blockNumber eth_chainId eth_chainId eth_estimateGas eth_getBlockByNumber eth_feeHistory eth_sendTransaction

Transaction: 0xcfa2b7ee08f8bf7fa89df8db0cf974f9d070fae676976d48ea37ce73fcb5e323 Gas usage: 57975 Block number: 124132798 Block time: Wed Aug 23 2023 09:05:42 GMT+0000 (Coordinated Universal Time)

eth_chainId eth_getTransactionByHash eth_chainId eth_getTransactionReceipt eth_blockNumber eth_blockNumber eth_call eth_call eth_blockNumber eth_chainId miner_stop miner_setEtherbase eth_coinbase eth_blockNumber miner_start eth_accounts eth_getBalance eth_estimateGas eth_gasPrice eth_sendTransaction

Transaction: 0xa436e2b5ab180af98abc1e6c53957640c2211787bf44e082f7f3cf0b0d118d1a Gas usage: 21000 Block number: 124132800 Block time: Wed Aug 23 2023 09:06:36 GMT+0000 (Coordinated Universal Time)