pub fn default_l1_batch_env(number: u32, timestamp: u64, fee_account: Address) -> L1BatchEnv {
    L1BatchEnv {
        previous_batch_hash: None,
        number: L1BatchNumber(number),
        timestamp,
        fee_account,
        enforced_base_fee: None,
        first_l2_block: L2BlockEnv {
            number,
            timestamp,
            prev_block_hash: L2BlockHasher::legacy_hash(L2BlockNumber(number - 1)),
            max_virtual_blocks_to_create: 1,
        },
        fee_input: BatchFeeInput::PubdataIndependent(PubdataIndependentBatchFeeModelInput {
            fair_l2_gas_price: 1,
            fair_pubdata_price: 1,
            l1_gas_price: 1,
        }),
    }
}
Creates a mock L1 batch env with reasonable params.
core/node/test_utils/src/lib.rs