vm.rollFork header validation error: excess_blob_gas

[GlebRadchenko]

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 (e028b92 2024-11-11T00:26:04.968342000Z)

What command(s) is the bug in?

forge test

Operating System

macOS (Apple Silicon)

Describe the bug

Got following error while running forge test:

[FAIL: vm.rollFork:  backend: failed committing transaction; header validation error: `excess_blob_gas` not set; `excess_blob_gas` not set;]

contract FoundryIssueTest is Test {
    uint256 immutable mainnetFork;

    constructor() {
        mainnetFork = vm.createFork("wss://scroll-mainnet.chainstacklabs.com/ws");
    }

    function setUp() public {
        vm.selectFork(mainnetFork);
    }

    function test() public {
        bytes32 targetTxHash = 0xf94774a1f69bba76892141190293ffe85dd8d9ac90a0a2e2b114b8c65764014c;
        vm.rollFork(targetTxHash);
    }
}

Note:
same behavior is observed using vm.createSelectFork

[zerosnacks]

Hi @GlebRadchenko I'm unable to reproduce your the error with the given test

Ran 1 test for test/FoundryIssueTest.sol:FoundryIssueTest
[PASS] test() (gas: 3072)
Traces:
  [3072] FoundryIssueTest::test()
    ├─ [0] VM::rollFork(0xf94774a1f69bba76892141190293ffe85dd8d9ac90a0a2e2b114b8c65764014c)
    │   └─ ← [Return] 
    └─ ← [Stop] 

Suite result: ok. 1 passed; 0 failed; 0 skipped; finished in 563.78ms (258.04ms CPU time)

Would you mind adding your foundry.toml / expand on your environment settings?

[GlebRadchenko]

Sure, here is my foundry.toml:

[profile.default]
src = 'src'
out = 'out'
libs = ['lib']
gas_reports = ["test/*"]
evm_version = "cancun"
solc-version = "0.8.25"

fs_permissions = [{ access = "read", path = "./"}] # for test json reading

no specific env settings:
rustc 1.82.0 (f6e511eec 2024-10-15)

[GlebRadchenko]

@zerosnacks noticed that if I use paris instead of cancun the test passes

[zerosnacks]

Thanks @GlebRadchenko for reporting, looks like an issue in the way we are setting the field here w/ cancun set:

foundry/crates/evm/core/src/backend/mod.rs

Lines 1925 to 1926 in 8c01706

	env.block.blob_excess_gas_and_price =
	block.header.excess_blob_gas.map(BlobExcessGasAndPrice::new);

Fix is incoming