light_batched_merkle_tree::rollover_state_tree

Function rollover_batched_state_tree

Source 
pub fn rollover_batched_state_tree(
    params: RolloverBatchStateTreeParams<'_>,
) -> Result<(), BatchedMerkleTreeError>
Expand description

Rollover an almost full batched state tree, ie create a new batched Merkle tree and output queue with the same parameters, and mark the old accounts as rolled over. The old tree and queue can be used until these are completely full.

Steps:

  1. Check that Merkle tree is ready to be rolled over: 1.1. rollover threshold is configured 1.2. next index is greater than rollover threshold 1.3. the network fee is not set if the current fee is zero
  2. Rollover Merkle tree and check: 2.1. Merkle tree and queue are associated. 2.2. Rollover is configured. 2.3. Tree is not already rolled over. 2.4. Mark as rolled over in this slot.
  3. Rollover output queue and check: 3.1. Merkle tree and queue are associated. 3.2. Rollover is configured. 3.3. Tree is not already rolled over. 3.4. Mark as rolled over in this slot.
  4. Initialize new Merkle tree and output queue with the same parameters as old accounts.