Failed to get EIP-1559 fees

[shafu0x]

Component

Forge

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

• Foundry
• Foundryup

What version of Foundry are you on?

forge 0.2.0 (0a5b22f 2024-05-21T10:32:10.544355000Z)

What command(s) is the bug in?

forge script

Operating System

Linux

Describe the bug

When I try to deploy on Ethereum Mainnet like this:

	forge script script/deploy/Deploy.V2.s.sol \
		--rpc-url $(MAINNET_RPC) \
		--sender $(MAINNET_OWNER) \
		--broadcast \
		--verify \
		-i 1 \
		-vvvv \
		--via-ir \
		--optimize

I get the following error Failed to get EIP-1559 fees and I have to use --legacy to fix this.

But --legacy gas estimation is not precise enough to ensure that all txs are going to be included.

[DaniPopes]

can you please post the full command output, is it an RPC error?

[mattsse]

ah this could be a forge version with buggy eth_feeHistory decoding

could you try newest forge, because this has been fixed

[shafu0x]

@mattsse yeah this fixed it, didn't realize I was running an old version. thanks

[vikiival]

This issue has magically appeared again in Sept 2024 on Base 🥺
Seems the --legacy was the fix

• Lesson 10: Deploy ERC20 token Error: Failed to get EIP-1559 fees Cyfrin/foundry-full-course-cu#1743

[shafu0x]

you can do --legacy but then you might be running into some weird gas miscalulations.