cw721 0.22.0

Definition and types for the CosmWasm-721 NFT interface
Documentation 
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use schemars::JsonSchema;

use cosmwasm_schema::cw_serde;
use cosmwasm_std::{to_json_binary, Binary, CosmosMsg, StdResult, WasmMsg};

/// Cw721ReceiveMsg should be de/serialized under `Receive()` variant in a ExecuteMsg
#[cw_serde]
pub struct Cw721ReceiveMsg {
    pub sender: String,
    pub token_id: String,
    pub msg: Binary,
}

impl Cw721ReceiveMsg {
    /// serializes the message
    pub fn into_json_binary(self) -> StdResult<Binary> {
        let msg = ReceiverExecuteMsg::ReceiveNft(self);
        to_json_binary(&msg)
    }

    /// creates a cosmos_msg sending this struct to the named contract
    pub fn into_cosmos_msg<TAddress: Into<String>, TCustomResponseMsg>(
        self,
        contract_addr: TAddress,
    ) -> StdResult<CosmosMsg<TCustomResponseMsg>>
    where
        TCustomResponseMsg: Clone + std::fmt::Debug + PartialEq + JsonSchema,
    {
        let msg = self.into_json_binary()?;
        let execute = WasmMsg::Execute {
            contract_addr: contract_addr.into(),
            msg,
            funds: vec![],
        };
        Ok(execute.into())
    }
}

/// This is just a helper to properly serialize the above message.
/// The actual receiver should include this variant in the larger ExecuteMsg enum
#[cw_serde]
pub enum ReceiverExecuteMsg {
    ReceiveNft(Cw721ReceiveMsg),
}