Lesson 5 : TypeError: Cannot read properties of undefined (reading 'wait')

[wwwbaraccuda]

When I deploy the deploy.js using node deploy, This error occured :
TypeError: Cannot read properties of undefined (reading 'wait')

I follow the exact code, which is this :

const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
 console.log("Deploying, please wait...");
 const contract = await contractFactory.deploy(); //STOP here! Wait for contract to deploy
 const deploymentReceipt = await contract.deployTransaction.wait(1);
 console.log(deploymentReceipt);

But, still got an error.

Anyone know how to solve this?

[Nlferu]

Hello @wwwbaraccuda

What version of ethers are you using? Try this version and let me know if issue has been fixed "ethers": "^5.7.2"

[Astronaut828]

I ended up running it like this:

  const contractFactory = new ethers.ContractFactory(abi, binary, wallet)
    console.log("Deploying, please wait...")
    const contract = await contractFactory.deploy() // STOP here!! wait for contract to deploy
    await contract.deploymentTransaction().wait(1) // wait 1 block
    console.log(`Contract deployed to ${contract.target}`)

hope this helps 🤙

The problem was the older command:

contract.deployTransaction.wait(1);

[Nlferu]

Yes it is because of different ethers versions

[IBzmani]

I experienced same issue. I realized that it was because I am using "ethers": "^6.7.0" and not the "ethers": "^5.5.3" which was used in the course. There are some slight syntax changes here and there in version ^6.
Here's what you can do in this case:

Instead of

 const deploymentReceipt = await contract.deployTransaction.wait(1);

do this

 const deploymentReceipt = await contract.deploymentTransaction().wait(1);

It seems deployTransaction was changed to deploymentTransaction in version 6.

[wwwbaraccuda]

Thanks you!