KEVM support hangs when waiting for contract deploy transaction from ethers.js

[jeapostrophe]

When I connect to david.kevm.dev-mantis.iohkdev.io:8546 and run the sequence ethers.js sequence:

const factory = new ethers.ContractFactory(....);
const contract = await factory.deploy(...., { value });
const receipt = await contract.deployTransaction.wait();

I get a deploy transaction that shows up in https://david.kevm.dev-mantis.iohkdev.io/transaction/, but the receipt never returns. If I wait about 5 minutes, then the transaction is no longer listed in the explorer.

--

I made a reproduction script: https://github.com/reach-sh/reach-lang/blob/master/examples/tut-7/check-cardano.sh

You should be able to run it like:

git clone https://github.com/reach-sh/reach-lang
cd reach-lang
(cd js && make build) # Only once, if you want extra debug messages
cd examples/tut-7
./check-cardano.sh alice

This script uses Docker to initialize a VM with all the right things installed, so you shouldn't need any extra setup.

You will then need to answer the questions as follows:

Are you Alice?
y
Starting Rock, Paper, Scissors! as Alice
Would you like to create an account? (only possible on devnet)
n
What is your account secret?
[.........]
Do you want to deploy the contract? (y/n)
y

For your account secret, if you merge input-output-hk/mallet#21 then you'll be able to print out the private key from Mallet. It will print it out as <Buffer aa bb cc ... zz> you will want to input it as 0xaabbcc...zz. I made a burner account that you can play with if you want: 0x77bdf880f3d7efb6d53fc33d7ca97747d687330270e46662385aa0ef15cb1a06

If when you debug, you don't want to connect to the live Mantis KEVM instance, then you'll want to change the ETH_NODE_URI variable in the script to something else. However, since it inside a Docker image, localhost won't work. If you wanted to use a localhost, then you would use host.docker.internal (and make sure the server is listening to 0.0.0.0, not localhost.)

Please contact me for any more information. I'd be happy to do some live debugging.

[jeapostrophe]

I talked on the Slack about this with Vukasin Vukoje, but he was not able to find any answers in the short time we talked

[jeapostrophe]

BTW, my reproduction script is for my actual use case. I hope that it would be relatively easy for ya'll to build a little test directly with ethers.js. If my script doesn't "just work" for you, I would be exceedingly happy for you to try the direct path instead.

[jeapostrophe]

And if you think the Solidity code is relevant, it's here: https://github.com/reach-sh/reach-lang/blob/master/examples/tut-7/build/index.main.sol

[matiwinnetou]

Hi @jmendiola222 @loverdos @rtkaczyk could you provide a rough estimate how hard or easy it is to do and rough ETA? Reach team is very keen to continue working but they are blocked on those issues. We are hoping this is not an architectural problem and a small bug...

[jeapostrophe]

Just to be super clear, if #872 were fixed, this issue would probably be resolved. Since that issue is simpler, it would be better to focus effort there.

[drospa]

Hello @jeapostrophe,
coming back from our email thread, Mantis KEVM wasn't continued and was decoupled from the most recent versions of KVEM. We are in internal discussions to start a project and bring it back to the newest compatible versions of solidity. This might take 2-3 months.

On the meantime I recommend to check the KEVM that Cardano team is doing https://developers.cardano.org/en/virtual-machines/kevm/getting-started/using-the-kevm-devnet/