Function pallet_bridge_messages::messages_generation::prepare_messages_storage_proof

pub fn prepare_messages_storage_proof<BridgedChain: Chain, ThisChain: ChainWithMessages, LaneId: Encode + Copy>(
    lane: LaneId,
    message_nonces: RangeInclusive<MessageNonce>,
    outbound_lane_data: Option<OutboundLaneData>,
    proof_params: UnverifiedStorageProofParams,
    generate_message: impl Fn(MessageNonce) -> MessagePayload,
    encode_message: impl Fn(MessageNonce, &MessagePayload) -> Option<Vec<u8>>,
    encode_outbound_lane_data: impl Fn(&OutboundLaneData) -> Vec<u8>,
    add_duplicate_key: bool,
    add_unused_key: bool,
) -> (HashOf<BridgedChain>, RawStorageProof)
where
    HashOf<BridgedChain>: Copy + Default,

Prepare storage proof of given messages.

Returns state trie root and nodes with prepared messages.