litellm-rs 0.6.0

A high-performance AI Gateway written in Rust, providing OpenAI-compatible APIs with intelligent routing, load balancing, and enterprise features
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

use super::*;
use crate::core::budget::{ModelLimitConfig, ProviderLimitConfig, ResetPeriod};
use crate::core::keys::{CreateKeyConfig, InMemoryKeyRepository};
use crate::core::types::responses::{ChatDelta, ChatStreamChoice, FinishReason};

#[test]
fn empty_internal_stream_sentinel_is_not_candidate_output() {
    let mut chunk = ChatChunk {
        id: "stream-sentinel".to_string(),
        object: "chat.completion.chunk".to_string(),
        created: 0,
        model: "gemini-test".to_string(),
        choices: vec![],
        usage: None,
        system_fingerprint: None,
    };
    assert!(!stream_chunk_has_candidate_output(&chunk));

    let finish_only = ChatStreamChoice {
        index: 0,
        delta: ChatDelta::default(),
        finish_reason: Some(FinishReason::Stop),
        logprobs: None,
    };
    chunk.choices.push(finish_only);
    assert!(stream_chunk_has_candidate_output(&chunk));

    chunk.choices[0].finish_reason = None;
    chunk.choices[0].delta.content = Some("candidate output".to_string());
    assert!(stream_chunk_has_candidate_output(&chunk));
}

#[tokio::test]
async fn stream_disconnect_without_usage_records_reserved_key_cost() {
    let budget = UnifiedBudgetLimits::new();
    budget.providers.set_provider_limit(
        "openai",
        ProviderLimitConfig::new(1000.0, ResetPeriod::Monthly),
    );
    budget.models.set_model_limit(
        "gpt-4o",
        ModelLimitConfig::new(1000.0, ResetPeriod::Monthly),
    );
    let keys = KeyManager::new(InMemoryKeyRepository::new());
    let (key_id, _) = keys
        .generate_key(CreateKeyConfig {
            name: "stream key".to_string(),
            ..Default::default()
        })
        .await
        .expect("test key should be created");
    let reservation = reserve_completion_budget(&budget, "openai", "gpt-4o", 0, Some(100))
        .expect("reservation should succeed")
        .expect("priced model should reserve budget");
    let reserved = reservation.reserved_amount();

    record_stream_disconnect_spend_with_reservation(usage_spend_settlement(
        (&budget, &keys, Some(key_id)),
        ("openai", "gpt-4o", None),
        Some(reservation),
        None,
    ))
    .await;

    let stats = keys
        .get_usage_stats(key_id)
        .await
        .expect("usage stats should be readable");
    assert_eq!(stats.total_requests, 1);
    assert_eq!(stats.total_tokens, 0);
    assert_eq!(stats.total_cost, reserved);
}

#[tokio::test]
async fn finished_stream_without_usage_records_reserved_key_cost_after_output() {
    let budget = UnifiedBudgetLimits::new();
    budget.providers.set_provider_limit(
        "openai",
        ProviderLimitConfig::new(1000.0, ResetPeriod::Monthly),
    );
    budget.models.set_model_limit(
        "gpt-4o",
        ModelLimitConfig::new(1000.0, ResetPeriod::Monthly),
    );
    let keys = KeyManager::new(InMemoryKeyRepository::new());
    let (key_id, _) = keys
        .generate_key(CreateKeyConfig {
            name: "finished stream key".to_string(),
            ..Default::default()
        })
        .await
        .expect("test key should be created");
    let reservation = reserve_completion_budget(&budget, "openai", "gpt-4o", 0, Some(100))
        .expect("reservation should succeed")
        .expect("priced model should reserve budget");
    let reserved = reservation.reserved_amount();

    record_finished_stream_spend_with_reservation(StreamSpendSettlement {
        budget_limits: &budget,
        key_manager: &keys,
        api_key_id: Some(key_id),
        provider: "openai",
        model: "gpt-4o",
        pricing_provider: "openai",
        pricing_model: "gpt-4o",
        usage: None,
        saw_upstream_output: true,
        budget_reservation: Some(reservation),
        key_budget_reservation: None,
    })
    .await;

    assert_eq!(
        budget
            .providers
            .get_provider_usage("openai")
            .unwrap()
            .current_spend,
        reserved
    );
    assert_eq!(
        budget
            .models
            .get_model_usage("gpt-4o")
            .unwrap()
            .current_spend,
        reserved
    );
    let stats = keys
        .get_usage_stats(key_id)
        .await
        .expect("usage stats should be readable");
    assert_eq!(stats.total_requests, 1);
    assert_eq!(stats.total_tokens, 0);
    assert_eq!(stats.total_cost, reserved);
}