Trait zcash_primitives::extensions::transparent::Extension

pub trait Extension<C> {
    type Precondition;
    type Witness;
    type Error;
    fn verify_inner(
        &self, 
        precondition: &Self::Precondition, 
        witness: &Self::Witness, 
        context: &C
    ) -> Result<(), Self::Error>;

    fn verify(
        &self, 
        precondition: &Precondition, 
        witness: &Witness<AuthData>, 
        context: &C
    ) -> Result<(), Self::Error>
    where
        Self::Precondition: FromPayload<Error = Self::Error>,
        Self::Witness: FromPayload<Error = Self::Error>,
    { ... }
}

This is the primary trait which must be implemented by an extension type for that type to be eligible for inclusion in Zcash consensus rules.

Associated Types

type Precondition

Extension-specific precondition type. The extension will need to implement [FromPayload<Error = Self::Error>] for this type in order for their extension to be eligible for integration into consensus rules.

type Witness

Extension-specific witness type. The extension will need to implement [FromPayload<Error = Self::Error>] for this type in order for their extension to be eligible for integration into consensus rules.

type Error

Extension-specific error type. This should encompass both parsing and verification errors.

Required methods

fn verify_inner(
    &self,
    precondition: &Self::Precondition,
    witness: &Self::Witness,
    context: &C
) -> Result<(), Self::Error>

This is the primary method that an extension must implement. Implementations should return [Ok(())] if verification of the witness succeeds against the supplied precondition, and an error in any other case.

Provided methods

fn verify(
    &self,
    precondition: &Precondition,
    witness: &Witness<AuthData>,
    context: &C
) -> Result<(), Self::Error> where
    Self::Precondition: FromPayload<Error = Self::Error>,
    Self::Witness: FromPayload<Error = Self::Error>, 

This is a convenience method intended for use by consensus nodes at the integration point to provide easy interoperation with the opaque, cross-extension Precondition and Witness types.

Implementors