syntax = "proto3";

package generate.v1;

service TextGenerationService {
    /// Service discovery
    rpc ServiceDiscovery (ServiceDiscoveryRequest) returns (ServiceDiscoveryResponse) {}
    /// Empties batch cache
    rpc ClearCache (ClearCacheRequest) returns (ClearCacheResponse);
    /// Generate tokens for a batch
    rpc Generate (GenerateRequest) returns (GenerateResponse);
    /// Generate tokens for a list of cached batches
    rpc GenerateWithCache (GenerateWithCacheRequest) returns (GenerateWithCacheResponse);
}

/// Empty request
message ServiceDiscoveryRequest {}

message ServiceDiscoveryResponse {
    /// Other shards urls
    repeated string urls = 1;
}

/// Empty request
message ClearCacheRequest {}

/// Empty response
message ClearCacheResponse {}

message NextTokenChooserParameters {
    /// exponential scaling output probability distribution
    float temperature = 1;
    /// restricting to the k highest probability elements
    uint32 top_k = 2;
    /// restricting to top tokens summing to prob_cut_off <= prob_cut_off
    float top_p = 3;
    /// apply sampling on the logits
    bool do_sample = 4;
}

message StoppingCriteriaParameters {
    /// Maximum number of generated tokens
    uint32 max_new_tokens = 1;
    /// Optional stopping sequences
    repeated string stop_sequences = 2;
}

message Request {
    /// Request ID
    uint64 id = 1;
    /// The generation context
    string inputs = 2;
    /// The number of tokens inside inputs
    uint32 input_length = 3;
    /// Next Token Chooser Parameters
    NextTokenChooserParameters parameters = 4;
    /// Stopping Criteria Parameters
    StoppingCriteriaParameters stopping_parameters = 5;
}

message Batch {
    /// Batch ID
    uint64 id = 1;
    /// Individual requests
    repeated Request requests = 2;
    /// Batch size (==len(requests))
    uint32 size = 3;
}

message GeneratedText {
    /// Request
    Request request = 1;
    /// Output
    string output_text = 2;
    /// Number of generated tokens
    uint32 generated_tokens = 3;
    /// Tokens
    repeated string tokens = 4;
    /// Token IDs
    repeated uint32 token_ids = 5;
    /// Logprobs
    repeated float logprobs = 6;
    /// Finish reason
    string finish_reason = 7;
}

message GenerateRequest {
    /// Batch
    Batch batch = 1;
}

message GenerateResponse {
    /// Finished requests
    repeated GeneratedText generated_texts = 1;
    /// Next batch (cached)
    optional Batch batch = 2;
}

message GenerateWithCacheRequest {
    /// Cached batches
    repeated Batch batches = 1;
}

message GenerateWithCacheResponse {
    /// Finished requests
    repeated GeneratedText generated_texts = 1;
    /// Next batch (cached)
    optional Batch batch = 2;
}