pub trait KeyOwnerProofSystem<Key> {
    type Proof: Codec;
    type IdentificationTuple: Codec;

    // Required methods
    fn prove(key: Key) -> Option<Self::Proof>;
    fn check_proof(
        key: Key,
        proof: Self::Proof
    ) -> Option<Self::IdentificationTuple>;
Expand description

Something which can compute and check proofs of a historical key owner and return full identification data of that key owner.

Required Associated Types§


type Proof: Codec

The proof of membership itself.


type IdentificationTuple: Codec

The full identification of a key owner and the stash account.

Required Methods§


fn prove(key: Key) -> Option<Self::Proof>

Prove membership of a key owner in the current block-state.

This should typically only be called off-chain, since it may be computationally heavy.

Returns Some iff the key owner referred to by the given key is a member of the current set.


fn check_proof( key: Key, proof: Self::Proof ) -> Option<Self::IdentificationTuple>

Check a proof of membership on-chain. Return Some iff the proof is valid and recent enough to check.

Implementations on Foreign Types§


impl<Key> KeyOwnerProofSystem<Key> for ()


type Proof = Void


type IdentificationTuple = Void


fn prove(_key: Key) -> Option<Self::Proof>


fn check_proof( _key: Key, _proof: Self::Proof ) -> Option<Self::IdentificationTuple>