Struct SubscriptionAttributes

pub struct SubscriptionAttributes<T: NestedEncode + NestedDecode + TypeAbi> {
    pub expiration: u64,
    pub attributes: T,
}

Standard smart contract module for managing a Subscription NFT. Adaptation of the EIP-5643 for MultiversX, more here https://eips.ethereum.org/EIPS/eip-5643

This standard is an extension of the MultiversX NFT standard. It proposes an additional interface for NFTs to be used as recurring, expirable subscriptions. The interface includes functions to renew and cancel the subscription.

Since the NFT standard only has one field for adding arbitrary data (attributes), The module also provides functions for creating NFTs with subscription as well as for reading and updating attributes This allows developers to add additional data to the subscription expiration

Developers should be careful when interacting with custom attributes at the same time as subscription They should exclusively use the functions from this module The use of the generic function for updating nft attributes might result in data loss

The module provides functions for:

• creating a subscription nft
• updating custom attributes
• getting custom attributes
• renewing a subscription
• cancelling a subscription
• getting the expiration

Fields

expiration: u64

attributes: T

Trait Implementations

impl<T: NestedEncode + NestedDecode + TypeAbi> TopDecode for SubscriptionAttributes<T>

fn top_decode_or_handle_err<I, H>( top_input: I, __h__: H, ) -> Result<Self, H::HandledErr>

where I: TopDecodeInput, H: DecodeErrorHandler,

Version of top_decode that can handle errors as soon as they occur. For instance it can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn top_decode<I>(input: I) -> Result<Self, DecodeError>

where I: TopDecodeInput,

Attempt to deserialize the value from input.

impl<T: NestedEncode + NestedDecode + TypeAbi> TopEncode for SubscriptionAttributes<T>

fn top_encode_or_handle_err<O, H>( &self, output: O, __h__: H, ) -> Result<(), H::HandledErr>

where O: TopEncodeOutput, H: EncodeErrorHandler,

Version of top_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn top_encode<O>(&self, output: O) -> Result<(), EncodeError>

where O: TopEncodeOutput,

Attempt to serialize the value to ouput.

impl<T: NestedEncode + NestedDecode + TypeAbi> TypeAbi for SubscriptionAttributes<T>

type Unmanaged = SubscriptionAttributes<T>

fn type_name() -> TypeName

fn provide_type_descriptions<TDC: TypeDescriptionContainer>( accumulator: &mut TDC, )

A type can provide more than its own name. For instance, a struct can also provide the descriptions of the type of its fields. TypeAbi doesn’t care for the exact accumulator type, which is abstracted by the TypeDescriptionContainer trait.

fn type_names() -> TypeNames

fn type_name_rust() -> String

impl<T: NestedEncode + NestedDecode + TypeAbi> TypeAbiFrom<&SubscriptionAttributes<T>> for SubscriptionAttributes<T>

impl<T: NestedEncode + NestedDecode + TypeAbi> TypeAbiFrom<SubscriptionAttributes<T>> for SubscriptionAttributes<T>