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op-supernode/virtual_node: Update L1 genesis handling for genesis L2 block #19114

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Merged
raffaele-oplabs merged 2 commits into from
Feb 10, 2026
+6 −2
Merged

op-supernode/virtual_node: Update L1 genesis handling for genesis L2 block #19114

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f0f562b
Update L1 genesis handling for genesis L2 block
geoknee Feb 9, 2026
2d2548d
empty commit to trigger CI checks
geoknee Feb 10, 2026
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6 changes: 5 additions & 1 deletion op-supernode/supernode/chain_container/virtual_node/virtual_node.go
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Original file line number Diff line number Diff line change
Expand Up @@ -226,8 +226,12 @@ func (v *simpleVirtualNode) L1AtSafeHead(ctx context.Context, target eth.BlockID
}

// Special case: genesis L2 block is trivially safe at genesis L1
// Note: We use L1 block 0 (not cfg.Genesis.L1) because contracts may have been deployed
// earlier than cfg.Genesis.L1, allowing dispute games with L1 heads prior to cfg.Genesis.L1
if target == v.cfg.Rollup.Genesis.L2 {
return v.cfg.Rollup.Genesis.L1, nil
// Return L1 block 0 (L1 genesis)
l1Genesis := eth.BlockID{Number: 0} // Hash not necessary
return l1Genesis, nil
}

// Get the latest entry to start the walkback
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2 changes: 1 addition & 1 deletion op-supernode/supernode/chain_container/virtual_node/virtual_node_test.go
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Expand Up @@ -474,7 +474,7 @@ func TestVirtualNode_L1AtSafeHead(t *testing.T) {
// Query for genesis L2 block
result, err := vn.L1AtSafeHead(context.Background(), genesisL2)
require.NoError(t, err)
require.Equal(t, genesisL1, result)
require.Equal(t, eth.BlockID{}, result) // Genesis L2 target returns genesis L1 directly, but without the hash
})

t.Run("genesis L2 number with different hash is not treated as genesis", func(t *testing.T) {
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