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
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
pub struct Params {
    pub block: BlockInfo,
    pub message: MessageInfo,
    pub contract: ContractInfo,
}

#[derive(Serialize, Deserialize)]
pub struct BlockInfo {
    pub height: i64,
    // time is seconds since epoch begin (Jan. 1, 1970)
    pub time: i64,
    pub chain_id: String,
}

#[derive(Serialize, Deserialize)]
pub struct MessageInfo {
    pub signer: String,
    pub sent_funds: Vec<Coin>,
}

#[derive(Serialize, Deserialize)]
pub struct ContractInfo {
    pub address: String,
    pub balance: Vec<Coin>,
}

#[derive(Serialize, Deserialize, Clone)]
pub struct Coin {
    pub denom: String,
    pub amount: String,
}

#[derive(Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum CosmosMsg {
    // this moves tokens in the underlying sdk
    Send {
        from_address: String,
        to_address: String,
        amount: Vec<Coin>,
    },
    // this dispatches a call to another contract at a known address (with known ABI)
    // msg is the json-encoded HandleMsg struct
    Contract {
        contract_addr: String,
        msg: String,
    },
    // this should never be created here, just passed in from the user and later dispatched
    Opaque {
        data: String,
    },
}

#[derive(Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum ContractResult {
    Ok(Response),
    Err(String),
}

impl ContractResult {
    // unwrap will panic on err, or give us the real data useful for tests
    pub fn unwrap(self) -> Response {
        match self {
            ContractResult::Err(msg) => panic!("Unexpected error: {}", msg),
            ContractResult::Ok(res) => res,
        }
    }

    pub fn is_err(&self) -> bool {
        match self {
            ContractResult::Err(_) => true,
            _ => false,
        }
    }
}

#[derive(Serialize, Deserialize, Default)]
pub struct Response {
    // let's make the positive case a struct, it contrains Msg: {...}, but also Data, Log, maybe later Events, etc.
    pub messages: Vec<CosmosMsg>,
    pub log: Option<String>,
    pub data: Option<String>,
}

// just set signer, sent funds, and balance - rest given defaults
// this is intended for use in testcode only
pub fn mock_params(signer: &str, sent: &[Coin], balance: &[Coin]) -> Params {
    Params {
        block: BlockInfo {
            height: 12_345,
            time: 1_571_797_419,
            chain_id: "cosmos-testnet-14002".to_string(),
        },
        message: MessageInfo {
            signer: signer.to_string(),
            sent_funds: sent.to_vec(),
        },
        contract: ContractInfo {
            address: "cosmos2contract".to_string(),
            balance: balance.to_vec(),
        },
    }
}

// coin is a shortcut constructor for a set of one denomination of coins
pub fn coin(amount: &str, denom: &str) -> Vec<Coin> {
    vec![Coin {
        amount: amount.to_string(),
        denom: denom.to_string(),
    }]
}

#[cfg(test)]
mod test {
    use super::*;
    use crate::serde::{from_slice, to_vec};

    #[test]
    fn can_deser_error_result() {
        let fail = ContractResult::Err("foobar".to_string());
        let bin = to_vec(&fail).expect("encode contract result");
        let _: ContractResult = from_slice(&bin).expect("decode contract result");
        // need Derive Debug and PartialEq for this, removed to save space
        //        assert_eq!(fail, back);
    }

    #[test]
    fn can_deser_ok_result() {
        let send = ContractResult::Ok(Response {
            messages: vec![CosmosMsg::Send {
                from_address: "me".to_string(),
                to_address: "you".to_string(),
                amount: coin("1015", "earth"),
            }],
            log: Some("released funds!".to_string()),
            data: None,
        });
        let bin = to_vec(&send).expect("encode contract result");
        let _: ContractResult = from_slice(&bin).expect("decode contract result");
        // need Derive Debug and PartialEq for this, removed to save space
        //        assert_eq!(send, back);
    }
}