bug(`forge script --verify`): `deserialization error: invalid value: string "Error! Missing Or invalid Module name (#2)"`

[nufailTanjiro]

Component

Forge

Have you ensured that all of these are up to date?

• [X] Foundry
• [X] Foundryup

What version of Foundry are you on?

forge 0.2.0 (f479e94 2024-06-01T00:21:09.122773900Z)

What command(s) is the bug in?

forge script script/Deploy.s.sol --rpc-url $BASE_SEPOLIA_RPC_URL --private-key $DEPLOYER_PRIVATE_KEY --broadcast -vvvv --verify --etherscan-api-key $BASESCAN_API_KEY --via-ir

Operating System

Windows

Describe the bug

This is my: BASE_SEPOLIA_RPC_URL='https://api-sepolia.basescan.org/api'

Whenever I run try to deploy my Upgradeable contract with proxy I am getting this error

Error: 
deserialization error: invalid value: string "Error! Missing Or invalid Module name (#2)", expected a 8 byte hex string at line 1 column 44

Context:
- invalid value: string "Error! Missing Or invalid Module name (#2)", expected a 8 byte hex string at line 1 column 44

I deployed the proxy on amoy testnet but when I try to deploy it on base sepolia I am facing this issue

I also tried using blockscout:

 forge script script/Deploy.s.sol --rpc-url $BASE_SEPOLIA_RPC_URL --private-key $DEPLOYER_PRIVATE_KEY --broadcast -vvvv --verify --verifier blockscout  --verifier-url 'https://base-sepolia.blockscout.com/api?apikey=<API_KEY>' --via-ir

But couldn't deploy and verify

[zerosnacks]

Hi @nufailTanjiro,

BASE_SEPOLIA_RPC_URL='https://api-sepolia.basescan.org/api' is the Etherscan API endpoint, not the RPC URL

You are recommended to use an RPC provider like Alchemy / Infura or pick one from the public RPC list (less reliable): https://chainlist.org/?search=base and use that as your RPC_URL

In most cases you don't have to specify the Etherscan API endpoint manually as we automatically derive it from the chain id