Struct StateCompareAndWriteArgs 

pub struct StateCompareAndWriteArgs<'a> {
    pub state_ptr: NonNull<Address>,
    pub old_state_ptr: NonNull<<VariableBytes<RECOMMENDED_STATE_CAPACITY> as IoType>::PointerType>,
    pub old_state_size: u32,
    pub old_state_capacity: u32,
    pub new_state_ptr: NonNull<<VariableBytes<RECOMMENDED_STATE_CAPACITY> as IoType>::PointerType>,
    pub new_state_size: u32,
    pub new_state_capacity: u32,
    pub ok_result_ptr: NonNull<Bool>,
    /* private fields */
}

Data structure containing expected input for external method invocation, eventually calling state_compare_and_write() on the other side by the host.

This can be used with Env, though there are helper methods on this provided by extension trait that allow not dealing with this struct directly in simpler cases.

Fields

state_ptr: NonNull<Address>

old_state_ptr: NonNull<<VariableBytes<RECOMMENDED_STATE_CAPACITY> as IoType>::PointerType>

old_state_size: u32

Size of the contents old_state_ptr points to

old_state_capacity: u32

Capacity of the contents old_state_ptr points to

new_state_ptr: NonNull<<VariableBytes<RECOMMENDED_STATE_CAPACITY> as IoType>::PointerType>

new_state_size: u32

Size of the contents new_state_ptr points to

new_state_capacity: u32

Capacity of the contents new_state_ptr points to

ok_result_ptr: NonNull<Bool>

Implementations

impl<'a> StateCompareAndWriteArgs<'a>

pub fn new( state: &'a Address, old_state: &'a VariableBytes<RECOMMENDED_STATE_CAPACITY>, new_state: &'a VariableBytes<RECOMMENDED_STATE_CAPACITY>, ok_result: &'a mut MaybeUninit<Bool>, ) -> Self

Create a new instance.

NOTE: Make sure to query updated sizes of arguments after calling the contract.

Trait Implementations

impl<'a> Debug for StateCompareAndWriteArgs<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl ExternalArgs for StateCompareAndWriteArgs<'_>

const FINGERPRINT: MethodFingerprint

Fingerprint of the method being called

const METADATA: &'static [u8] = METADATA

Metadata that corresponds to a method being called