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Chronological Updates

This file will contain all updates to sections.

Lesson 5

Windows, WSL, & Ganache

  • Per this question, if you're using WSL, for the ganache UI you'll have to use a different endpoint.

You have 4 options to fix this:

  1. Use the WSL endpoint on the ganache UI (this sometimes doesn't work)
  2. Use ganache from the command line
  3. Use ganache-cli from the command line (not recommended)
  4. Just use hardhat from the command line (you'll have to use hardhat at some point anyways!)

Using the WSL Endpoint

On the Ganache UI, you can select a different hostname and connect to whatever IP you see. In the example below, you'd connect to 172.24.224.1

img

You can also try to edit it by:

  1. Inside Ganache in the top-right corner tap on the gear icon (settings).
  2. Then in the server tab, change the HOSTNAME and select 0.0.0.0 - All Interfaces.
  3. Now replace your RPC Server URL inside the code with this latest URL that will be something like: HTTP://0.0.0.0.7545. Recheck this from Ganache.

Using ganache

yarn global add ganache
ganache

Keep this running in it's own terminal, and use the endpoint it gives you. To kill it, press CTRL + C.

See the discussion here

Using ganache-cli from the command line.

Or, optionally, you can install ganache-cli as this user did.

yarn global add ganache-cli
ganache-cli

Keep this running in it's own terminal, and use the endpoint it gives you. To kill it, press CTRL + C.

Using hardhat

See the discussion here

yarn add --dev hardhat
yarn hardhat

Then select the Create an empty hardhat.config.js

Then run:

yarn hardhat node

Keep this running in it's own terminal, and use the endpoint it gives you. To kill it, press CTRL + C.

Lesson 9

Keepers Not Kicking Off Troubleshooting

If your keepers are not kicking off, run through this checklist to find out why.

  1. Double check the subscription ID in your contract
  2. Double check the subscription is funded with enough LINK
  3. Is checkUpkeep returning true?
  4. Can you call performUpkeep yourself? (If you can't the keeper can't!)

Lesson 15

Metamask Troubleshooting while using Gitpod

  • Remember if you are using gitpod then you cannot connect your local hardhat node with metamask. To resolve this you can use vs code or testnets instead of local node.