Count the keys currently available in the keypool.
Declared in <wallet/wallet.h>
[[requires_capability(0x7fbc76bfe838), requires_capability(0x7fbc81b781f8), requires_capability(0x7fbc7e016078), requires_capability(0x7fbc7e245528), requires_capability(0x7fbc8e716168)]]
unsigned int
GetKeyPoolSize() const;
The keypool size.