x0x 0.34.0

Agent-to-agent gossip network for AI systems — no winners, no losers, just cooperation
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

//! Route handlers (`category: "presence"` in `src/api/mod.rs`).
//!
//! Extracted verbatim from `src/server/mod.rs` as part of the #125 / WS1.4
//! server decomposition. The router registrations stay in the parent module.

use super::super::state::AppState;
use super::super::{api_error, bad_request};
use super::discovery::discovered_agent_entry;
use crate as x0x;
use axum::extract::{Path, Query, State};
use axum::http::StatusCode;
use axum::response::IntoResponse;
use axum::Json;
use serde::Deserialize;
use std::sync::Arc;

/// Query parameters for presence endpoints that accept TTL and timeout.
#[derive(Debug, Deserialize)]
pub(in crate::server) struct PresenceQueryParams {
    /// FOAF hop count (default: 3).
    #[serde(default = "default_foaf_ttl")]
    ttl: u8,
    /// Query timeout in milliseconds (default: 5000).
    #[serde(default = "default_foaf_timeout_ms")]
    timeout_ms: u64,
}

fn default_foaf_ttl() -> u8 {
    3
}

fn default_foaf_timeout_ms() -> u64 {
    5000
}

/// GET /presence
pub(in crate::server) async fn presence(State(state): State<Arc<AppState>>) -> impl IntoResponse {
    match state.agent.presence().await {
        Ok(agents) => {
            let entries: Vec<String> = agents.iter().map(|a| hex::encode(a.as_bytes())).collect();
            (
                StatusCode::OK,
                Json(serde_json::json!({ "ok": true, "agents": entries })),
            )
        }
        Err(e) => api_error(StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")),
    }
}

/// GET /presence/online
///
/// List all agents currently online (network view: all non-blocked agents from
/// the local discovery cache).
pub(in crate::server) async fn presence_online(
    State(state): State<Arc<AppState>>,
) -> impl IntoResponse {
    match state.agent.online_agents().await {
        Ok(agents) => {
            let contacts = state.agent.contacts().read().await;
            let filtered = x0x::presence::filter_by_trust(
                agents,
                &contacts,
                x0x::presence::PresenceVisibility::Network,
            );
            let entries: Vec<_> = filtered.into_iter().map(discovered_agent_entry).collect();
            (
                StatusCode::OK,
                Json(serde_json::json!({ "ok": true, "agents": entries })),
            )
        }
        Err(e) => api_error(StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")),
    }
}

/// GET /presence/foaf?ttl=3&timeout_ms=5000
///
/// FOAF random-walk discovery of nearby agents (social view: Trusted + Known only).
pub(in crate::server) async fn presence_foaf(
    State(state): State<Arc<AppState>>,
    Query(params): Query<PresenceQueryParams>,
) -> impl IntoResponse {
    match state
        .agent
        .discover_agents_foaf(params.ttl, params.timeout_ms)
        .await
    {
        Ok(agents) => {
            let contacts = state.agent.contacts().read().await;
            let filtered = x0x::presence::filter_by_trust(
                agents,
                &contacts,
                x0x::presence::PresenceVisibility::Social,
            );
            let entries: Vec<_> = filtered.into_iter().map(discovered_agent_entry).collect();
            (
                StatusCode::OK,
                Json(serde_json::json!({ "ok": true, "agents": entries })),
            )
        }
        Err(e) => api_error(StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")),
    }
}

/// GET /presence/find/:id?ttl=3&timeout_ms=5000
///
/// Find a specific agent by hex-encoded AgentId via FOAF random walk.
pub(in crate::server) async fn presence_find(
    State(state): State<Arc<AppState>>,
    Path(id): Path<String>,
    Query(params): Query<PresenceQueryParams>,
) -> impl IntoResponse {
    let bytes = match hex::decode(&id) {
        Ok(b) if b.len() == 32 => {
            let mut arr = [0u8; 32];
            arr.copy_from_slice(&b);
            arr
        }
        _ => {
            return bad_request("invalid agent id (expected 64 hex chars)");
        }
    };
    let agent_id = x0x::identity::AgentId(bytes);
    match state
        .agent
        .discover_agent_by_id(agent_id, params.ttl, params.timeout_ms)
        .await
    {
        Ok(Some(agent)) => (
            StatusCode::OK,
            Json(serde_json::json!({ "ok": true, "agent": discovered_agent_entry(agent) })),
        ),
        Ok(None) => (
            StatusCode::OK,
            Json(serde_json::json!({ "ok": true, "agent": null })),
        ),
        Err(e) => api_error(StatusCode::INTERNAL_SERVER_ERROR, format!("{e}")),
    }
}

/// GET /presence/status/:id
///
/// Local cache lookup for a specific agent — no network I/O.
pub(in crate::server) async fn presence_status(
    State(state): State<Arc<AppState>>,
    Path(id): Path<String>,
) -> impl IntoResponse {
    let bytes = match hex::decode(&id) {
        Ok(b) if b.len() == 32 => {
            let mut arr = [0u8; 32];
            arr.copy_from_slice(&b);
            arr
        }
        _ => {
            return bad_request("invalid agent id (expected 64 hex chars)");
        }
    };
    let agent_id = x0x::identity::AgentId(bytes);
    let cached = state.agent.cached_agent(&agent_id).await;
    let online = cached.is_some();
    let entry = cached.map(discovered_agent_entry);
    (
        StatusCode::OK,
        Json(serde_json::json!({ "ok": true, "online": online, "agent": entry })),
    )
}