Struct PreimageCallApi

pub struct PreimageCallApi<'api> { /* private fields */ }

Implementations

impl<'api> PreimageCallApi<'api>

pub fn note_preimage(&self, bytes: Vec<u8>) -> Result<WrappedCall>

Register a preimage on-chain.

If the preimage was previously requested, no fees or deposits are taken for providing the preimage. Otherwise, a deposit is taken proportional to the size of the preimage.

pub fn unnote_preimage(&self, hash: H256) -> Result<WrappedCall>

Clear an unrequested preimage from the runtime storage.

If len is provided, then it will be a much cheaper operation.

• hash: The hash of the preimage to be removed from the store.
• len: The length of the preimage of hash.

pub fn request_preimage(&self, hash: H256) -> Result<WrappedCall>

Request a preimage be uploaded to the chain without paying any fees or deposits.

If the preimage requests has already been provided on-chain, we unreserve any deposit a user may have paid, and take the control of the preimage out of their hands.

pub fn unrequest_preimage(&self, hash: H256) -> Result<WrappedCall>

Clear a previously made request for a preimage.

NOTE: THIS MUST NOT BE CALLED ON hash MORE TIMES THAN request_preimage.

Trait Implementations

impl<'api> Clone for PreimageCallApi<'api>

fn clone(&self) -> PreimageCallApi<'api>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'api> From<&'api Api> for PreimageCallApi<'api>

fn from(api: &'api Api) -> Self

Converts to this type from the input type.