syntax = "proto3";

package accounting;

option go_package = "github.com/nspcc-dev/neofs-api-go/accounting";
option csharp_namespace = "NeoFS.API.Accounting";

import "service/meta.proto";
import "service/verify.proto";
import "refs/types.proto";

// The service provides methods for obtaining information
// about the account balance in NeoFS system.
service Accounting {
    // Returns the amount of funds for the requested NeoFS account.
    rpc Balance (BalanceRequest) returns (BalanceResponse);
}

// Message defines the request body of Balance method.
//
// To indicate the account for which the balance is requested, its identifier is used.
//
// To gain access to the requested information, the request body must be formed according
// to the requirements from the system specification.
message BalanceRequest {
    // Carries user identifier in NeoFS system for which the balance is requested.
    refs.OwnerID OwnerID = 1;

    // Carries request meta information. Header data is used only to regulate message
    // transport and does not affect request execution.
    service.RequestMetaHeader MetaHeader = 98;

    // Carries request verification information. This header is used to authenticate
    // the nodes of the message route and check the correctness of transmission.
    service.RequestVerificationHeader VerifyHeader = 99;
}

// Decimal represents the decimal numbers.
message Decimal {
    // Value carries number value.
    int64 Value = 1;

    // Precision carries value precision.
    uint32 Precision = 2;
}

// Message defines the response body of Balance method.
//
// The amount of funds is calculated in decimal numbers.
message BalanceResponse {
    // Carries the amount of funds on the account.
    Decimal Balance = 1;
}