Register the ethereum kind to mint a fresh StateMachineAlwaysMerkle every call. Real production registers OnDiskMachine; the test substitutes a trie-c

Remember to match this with a call to `unreserve_avx_reg`.

Remember to match this with a call to `unreserve_general_reg`.

No discharge

Sets the span length

Discharge through `slt` overload

Discharge through `slt` overload

Returns a fresh RWOnDisk wired to the same worker thread (and thus the same UpdateAux, AsyncIO, and storage pool) but bound to a different machine + t

Bytes used by the pool metadata on this device

Attempts to read the payload associated with this event descriptor as the associated [`T::Event`](EventDecoder::Event) type.

Upward update until a unfinished parent node. For each tnode, create the trie Node when all its children are created

Copy the event descriptor for the consensus event pointed to by `iter`. If `iter` is pointing inside a block, rewind it to BLOCK_START, and copy that

Functions like monad_exec_ring_get_block_number expect the caller to pass a descriptor containing a consensus event; if this is not the case, we need

operator new / delete

WARNING: for unit testing only DO NOT invoke it outside of unit test

Get approximate total weight of the cached elements.

Caller must verify we are on the I/O-owning thread before calling; the promise has already been moved into `cont` and can no longer set a fallback res