1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73

#![allow(clippy::field_reassign_with_default)] // This is triggered in `#[derive(JsonSchema)]`

use crate::scrt::{
    cosmwasm_std::{
        HumanAddr, Uint128, Binary, StdResult, CosmosMsg, WasmMsg, to_binary
    },
    BLOCK_SIZE, space_pad
};
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};

/// Snip20ReceiveMsg should be de/serialized under `Receive()` variant in a HandleMsg
#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
#[serde(rename_all = "snake_case")]
#[serde(deny_unknown_fields)]
pub struct Snip20ReceiveMsg {
    pub sender: HumanAddr,
    pub from: HumanAddr,
    pub amount: Uint128,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub memo: Option<String>,
    pub msg: Option<Binary>,
}

impl Snip20ReceiveMsg {
    pub fn new(
        sender: HumanAddr,
        from: HumanAddr,
        amount: Uint128,
        memo: Option<String>,
        msg: Option<Binary>,
    ) -> Self {
        Self {
            sender,
            from,
            amount,
            memo,
            msg,
        }
    }

    /// serializes the message, and pads it to 256 bytes
    pub fn into_binary(self) -> StdResult<Binary> {
        let msg = ReceiverHandleMsg::Receive(self);
        let mut data = to_binary(&msg)?;
        space_pad(&mut data.0, BLOCK_SIZE);
        Ok(data)
    }

    /// creates a cosmos_msg sending this struct to the named contract
    pub fn into_cosmos_msg(
        self,
        callback_code_hash: String,
        contract_addr: HumanAddr,
    ) -> StdResult<CosmosMsg> {
        let msg = self.into_binary()?;
        let execute = WasmMsg::Execute {
            msg,
            callback_code_hash,
            contract_addr,
            send: vec![],
        };
        Ok(execute.into())
    }
}

// This is just a helper to properly serialize the above message
#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
#[serde(rename_all = "snake_case")]
#[serde(deny_unknown_fields)]
enum ReceiverHandleMsg {
    Receive(Snip20ReceiveMsg),
}