Component

Anvil

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

• Foundry
• Foundryup

What version of Foundry are you on?

forge 0.2.0 (ce687fc 2023-06-15T00:05:25.914566000Z)

What command(s) is the bug in?

anvil -b 1 --block-base-fee-per-gas 0

Operating System

macOS (Apple Silicon)

Describe the bug

1. Start a new anvil node with anvil -b 1 --block-base-fee-per-gas 0.
2. Run cast block to confirm baseFeePerGas is 0
3. Execute a bunch of transactions (in my case deploying a MUD app, but shouldn't be specific to the type of transactions)
4. Run cast block again, baseFeePerGas is now 1

This is problematic for local environments where transactions are executed from accounts with no balance.

Note: this wasn't the case yet with this version: