/**
 * RPC Semantic Convention attributes for OpenTelemetry
 *
 * Based on:
 * - https://opentelemetry.io/docs/specs/semconv/rpc/connect-rpc/
 * - https://opentelemetry.io/docs/specs/semconv/rpc/rpc-metrics/
 * - https://opentelemetry.io/docs/specs/semconv/attributes-registry/rpc/
 *
 * @module attributes
 */
declare const RPC_SYSTEM_CONNECT_RPC = "connect_rpc";
declare const ATTR_RPC_SYSTEM = "rpc.system";
declare const ATTR_RPC_SERVICE = "rpc.service";
declare const ATTR_RPC_METHOD = "rpc.method";
declare const ATTR_RPC_CONNECT_RPC_STATUS_CODE = "rpc.connect_rpc.status_code";
declare const ATTR_ERROR_TYPE = "error.type";
declare const ATTR_SERVER_ADDRESS = "server.address";
declare const ATTR_SERVER_PORT = "server.port";
declare const ATTR_NETWORK_PROTOCOL_NAME = "network.protocol.name";
declare const ATTR_NETWORK_TRANSPORT = "network.transport";
declare const ATTR_NETWORK_PEER_ADDRESS = "network.peer.address";
declare const ATTR_NETWORK_PEER_PORT = "network.peer.port";
/**
 * Connectum-specific span attribute that distinguishes RPC observations
 * carried by the in-process router transport from those carried by HTTP/2.
 *
 * Values:
 *   - `"in-process"` — the call traversed `createLocalTransport`
 *   - `"http"`       — the call traversed `createGrpcTransport` /
 *                      `createConnectTransport` (the network path)
 *
 * Parity tests strip this attribute before structural diffing so that the
 * remaining shape (spans, events, metric instruments) is invariant across
 * transports.
 *
 * @see ATTR_CONNECTUM_TRANSPORT_METRIC for the metric-label counterpart
 */
declare const ATTR_CONNECTUM_TRANSPORT = "connectum.transport";
/**
 * Metric-label counterpart of {@link ATTR_CONNECTUM_TRANSPORT}.
 *
 * Uses the short, lowercase form to align with OpenTelemetry metric
 * label conventions and existing `network.*` keys.
 */
declare const ATTR_CONNECTUM_TRANSPORT_METRIC = "transport";
/** Marker request header set by `createLocalTransport` from `@connectum/core`. */
declare const CONNECTUM_INTERNAL_TRANSPORT_HEADER = "connectum-internal-transport";
/** Header value indicating an in-process call (the only one currently defined). */
declare const CONNECTUM_INTERNAL_TRANSPORT_IN_PROCESS = "in-process";
declare const RPC_MESSAGE_EVENT = "rpc.message";
declare const ATTR_RPC_MESSAGE_TYPE = "rpc.message.type";
declare const ATTR_RPC_MESSAGE_ID = "rpc.message.id";
declare const ATTR_RPC_MESSAGE_UNCOMPRESSED_SIZE = "rpc.message.uncompressed_size";
/**
 * ConnectRPC error code map (numeric code -> string name)
 * Based on Connect protocol error codes
 */
declare const ConnectErrorCode: {
    readonly CANCELED: 1;
    readonly UNKNOWN: 2;
    readonly INVALID_ARGUMENT: 3;
    readonly DEADLINE_EXCEEDED: 4;
    readonly NOT_FOUND: 5;
    readonly ALREADY_EXISTS: 6;
    readonly PERMISSION_DENIED: 7;
    readonly RESOURCE_EXHAUSTED: 8;
    readonly FAILED_PRECONDITION: 9;
    readonly ABORTED: 10;
    readonly OUT_OF_RANGE: 11;
    readonly UNIMPLEMENTED: 12;
    readonly INTERNAL: 13;
    readonly UNAVAILABLE: 14;
    readonly DATA_LOSS: 15;
    readonly UNAUTHENTICATED: 16;
};
type ConnectErrorCode = (typeof ConnectErrorCode)[keyof typeof ConnectErrorCode];
/**
 * Reverse map: numeric code -> string name for span attributes
 */
declare const ConnectErrorCodeName: Record<number, string>;

export { ATTR_CONNECTUM_TRANSPORT, ATTR_CONNECTUM_TRANSPORT_METRIC, ATTR_ERROR_TYPE, ATTR_NETWORK_PEER_ADDRESS, ATTR_NETWORK_PEER_PORT, ATTR_NETWORK_PROTOCOL_NAME, ATTR_NETWORK_TRANSPORT, ATTR_RPC_CONNECT_RPC_STATUS_CODE, ATTR_RPC_MESSAGE_ID, ATTR_RPC_MESSAGE_TYPE, ATTR_RPC_MESSAGE_UNCOMPRESSED_SIZE, ATTR_RPC_METHOD, ATTR_RPC_SERVICE, ATTR_RPC_SYSTEM, ATTR_SERVER_ADDRESS, ATTR_SERVER_PORT, CONNECTUM_INTERNAL_TRANSPORT_HEADER, CONNECTUM_INTERNAL_TRANSPORT_IN_PROCESS, ConnectErrorCode, ConnectErrorCodeName, RPC_MESSAGE_EVENT, RPC_SYSTEM_CONNECT_RPC };