Clears number_of_slots slots of dynamic size, starting at slot,
and returns whether all the cleared slots were previously set.

Additional Information

If number_of_slots is zero, storage access will still occur,
but no slots will be cleared.

If number_of_slots is zero, function always returns true,
regardless of the slot.

Arguments

• slot: [b256] - The storage slot from which to start clearing.
• number_of_slots: [u64] - The number of slots to clear.

Returns

• [bool] - true if all the cleared storage slots were previously set. Otherwise, false.

Number of Storage Accesses

• Preloads: number_of_slots (to check whether the slots were previously set)
• Clears: 1

Examples

use std::storage::storage_api::{read_slot, write_slot, clear_slots_existed};

fn foo() {
    let five = 5_u64;
    write_slot(b256::zero(), five);
    let cleared = clear_slots_existed(b256::zero(), 1);
    assert(cleared);
    assert(read_slot::<u64>(b256::zero(), 0).is_none());
}