dwn 0.4.0

Rust implementation of a Decentralized Web Node.
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
135
136
137
138
139
140

use dwn_core::message::{Message, Version, descriptor::RecordsWriteBuilder, mime::Mime};
use reqwest::Url;
use xdid::core::did::Did;

use crate::Actor;

impl Actor {
    pub fn write(&self) -> ActorWriteBuilder<'_> {
        ActorWriteBuilder {
            actor: self,
            msg: RecordsWriteBuilder::default(),
            auth: true,
            sign: false,
            sync: true,
            target: None,
        }
    }
}

pub struct ActorWriteBuilder<'a> {
    actor: &'a Actor,
    msg: RecordsWriteBuilder,
    auth: bool,
    sign: bool,
    sync: bool,
    target: Option<&'a Did>,
}

impl<'a> ActorWriteBuilder<'a> {
    pub fn record_id(mut self, value: String) -> Self {
        self.msg.record_id = Some(value);
        self
    }

    pub fn context_id(mut self, value: String) -> Self {
        self.msg.context_id = Some(value);
        self
    }

    pub fn data(mut self, format: Mime, data: Vec<u8>) -> Self {
        self.msg.data_format = Some(format);
        self.msg.data = Some(data);
        self
    }

    pub fn schema(mut self, value: String) -> Self {
        self.msg.schema = Some(value);
        self
    }

    pub fn protocol(mut self, protocol: String, version: Version, path: String) -> Self {
        self.msg.protocol = Some(protocol);
        self.msg.protocol_version = Some(version);
        self.msg.protocol_path = Some(path);
        self
    }

    pub fn published(mut self, value: bool) -> Self {
        self.msg.published = Some(value);
        self
    }

    /// Whether to authorize the message.
    /// Defaults to `true`.
    pub fn auth(mut self, value: bool) -> Self {
        self.auth = value;
        self
    }

    /// Whether to sign the message data.
    /// Defaults to `false`.
    pub fn sign(mut self, value: bool) -> Self {
        self.sign = value;
        self
    }

    /// Whether to sync the message with the actor's remote DWN after processing.
    /// Defaults to `true`.
    pub fn sync(mut self, value: bool) -> Self {
        self.sync = value;
        self
    }

    /// Sets the target DID for DWN processing.
    /// Defaults to the actor's own DID.
    pub fn target(mut self, value: &'a Did) -> Self {
        self.target = Some(value);
        self
    }

    fn build(self) -> anyhow::Result<Message> {
        let mut msg = self.msg.build()?;

        if self.sign {
            self.actor.sign(&mut msg)?;
        }
        if self.auth {
            self.actor.authorize(&mut msg)?;
        }

        Ok(msg)
    }

    /// Sends the message to a remote DWN.
    /// Returns the written record ID.
    pub async fn send(self, url: &Url) -> anyhow::Result<String> {
        let actor = self.actor;
        let target = self.target.unwrap_or(&actor.did);

        let msg = self.build()?;
        let id = msg.record_id.clone();

        actor.send(target, &msg, url).await?;

        Ok(id)
    }

    /// Processes the message with the actor's local DWN.
    /// Returns the written record ID.
    pub async fn process(self) -> anyhow::Result<String> {
        let sync = self.sync;
        let actor = self.actor;
        let target = self.target.unwrap_or(&actor.did);

        let msg = self.build()?;
        let id = msg.record_id.clone();

        if sync && actor.remote.is_some() {
            actor.send_remote(target, &msg).await?;
        }

        actor
            .dwn
            .process_message(target, msg)
            .await
            .map_err(|e| anyhow::anyhow!("Failed to process message: {e}"))?;

        Ok(id)
    }
}