Anvil produces incorrect error message for certain eth_subscribe::newPendingTransaction calls

[scaraven]

Component

Anvil

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

• Foundry
• Foundryup

What version of Foundry are you on?

forge 0.3.0 (5a8bd89 2024-12-20T08:46:21.555250780Z)

What version of Foundryup are you on?

foundryup: 0.3.3

What command(s) is the bug in?

No response

Operating System

Linux

Describe the bug

Bug

I am currently using alloy-rs in order to watch pending transactions from an anvil instance (for testing purposes). alloy-rs uses this API Reference for the eth_subscribe::newPendingTransactions RPC call which is implemented in the following code snippet. The subscribe_full_pending_transactions() function tacks on a boolean parameter to request full transaction data rather than just transaction hashes.

Although it explicitly states within alloy-rs' documentation that this call is not supported by all Ethereum APIs, this call returns the following error message when performed on an anvil instance:

error code -32602: Expected params for logs subscription

Which is a misleading error message as we are making a eth_subscribe::newPendingTransactions call rather than eth_subscribe::logs. This error message originates from anvil code here due to the fact that Anvil believes the boolean parameter belongs to a logs call.

Possible Fixes

I am not suggesting that anvil should implement this API, however, it should be relatively straightforward to give a more accurate error message, especially given that certain blockchain libraries do implement eth_subscribe::newPendingTransactions calls with boolean parameters.

[Maliksb11]

ok