ddk 1.0.11

application tooling for DLCs 🌊
Documentation 
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

use bitcoin::bip32::Xpriv;
use bitcoin::key::rand::Rng;
use bitcoin::secp256k1::schnorr::Signature;
use ddk_messages::oracle_msgs::{OracleAnnouncement, OracleAttestation};
use kormir::storage::{MemoryStorage, Storage};
use kormir::Oracle as Kormir;

use crate::Oracle;

#[derive(Debug, Clone)]
pub struct MemoryOracle {
    pub oracle: Kormir<MemoryStorage>,
}

impl Default for MemoryOracle {
    fn default() -> Self {
        let mut seed: [u8; 64] = [0; 64];
        bitcoin::key::rand::thread_rng().fill(&mut seed);
        let xpriv = Xpriv::new_master(bitcoin::Network::Regtest, &seed).unwrap();
        let oracle = Kormir::from_xpriv(MemoryStorage::default(), xpriv).unwrap();
        Self { oracle }
    }
}

impl Oracle for MemoryOracle {
    fn name(&self) -> String {
        "kormir".to_string()
    }
}

#[async_trait::async_trait]
impl ddk_manager::Oracle for MemoryOracle {
    fn get_public_key(&self) -> bitcoin::XOnlyPublicKey {
        self.oracle.public_key()
    }

    async fn get_announcement(
        &self,
        event_id: &str,
    ) -> Result<OracleAnnouncement, ddk_manager::error::Error> {
        Ok(self
            .oracle
            .storage
            .get_event(event_id.parse().unwrap())
            .await
            .unwrap()
            .unwrap()
            .announcement)
    }

    async fn get_attestation(
        &self,
        event_id: &str,
    ) -> Result<OracleAttestation, ddk_manager::error::Error> {
        let event = self
            .oracle
            .storage
            .get_event(event_id.to_string())
            .await
            .unwrap()
            .unwrap();

        let sigs = event
            .signatures
            .iter()
            .map(|sig| sig.1)
            .collect::<Vec<Signature>>();

        let outcomes = event
            .signatures
            .iter()
            .map(|outcome| outcome.0.clone())
            .collect::<Vec<String>>();

        Ok(OracleAttestation {
            event_id: event.announcement.oracle_event.event_id,
            oracle_public_key: self.oracle.public_key(),
            signatures: sigs,
            outcomes,
        })
    }
}

#[cfg(test)]
mod tests {
    use chrono::{Local, TimeDelta};
    use ddk_manager::Oracle;

    use super::*;

    #[tokio::test]
    async fn get_and_sign() {
        let oracle = MemoryOracle::default();
        let expiry = TimeDelta::seconds(15);
        let timestamp: u32 = Local::now()
            .checked_add_signed(expiry)
            .unwrap()
            .timestamp()
            .try_into()
            .unwrap();
        let announcement = oracle
            .oracle
            .create_enum_event(
                "event_id".into(),
                vec!["rust".into(), "go".into()],
                timestamp,
            )
            .await
            .unwrap();

        let ann = oracle
            .get_announcement(&announcement.oracle_event.event_id)
            .await
            .unwrap();

        assert_eq!(ann, announcement);

        let sign = oracle
            .oracle
            .sign_enum_event(
                announcement.oracle_event.event_id.clone(),
                "rust".to_string(),
            )
            .await
            .unwrap();

        let att = oracle
            .get_attestation(&announcement.oracle_event.event_id)
            .await
            .unwrap();

        assert_eq!(sign, att);
    }
}