Private Key Error

[chibuikeRichmond]

Hello im on the arbitrage course wanna run the npx hardhat test after inserting my private key error msg pop up "Error HH8: There's one or more errors in your config file:

• Invalid account: #0 for network: testnet - private key too short, expected 32 bytes
• Invalid account: #0 for network: mainnet - private key too short, expected 32 bytes

To learn more about Hardhat's configuration, please go to https://hardhat.org/config/

[ryn2801]

Go to Metamask account details and then click export private key. You have to enter password and should get the full private key. Just make sure you have 0x prior to private key. It worked when I saved it after entering private key in. I used Linea Goerli Test net.

[whiteboytiv]

yes definitely must save the private key file after entering it