import type { OperationOptions, OperationTerminalRecord, WriteMode } from './operations.js';
import type { ConnectionId, GenerationId } from './primitives.js';
import type { CleanupRecord } from './errors.js';
import type { BoundedAsyncStream } from './streams.js';
/** BLE's mandatory lower ATT MTU bound, including opcode and attribute handle bytes. */
export declare const MINIMUM_ATT_MTU = 23;
/** Android's documented maximum request value; a peer may negotiate a lower value. */
export declare const MAXIMUM_REQUESTED_ATT_MTU = 517;
/** Android's supported caller-directed connection link-priority requests. */
export type ConnectionPriority = 'low-power' | 'balanced' | 'high-throughput';
export type BlePhy = 'le-1m' | 'le-2m' | 'le-coded';
export type PhyPreference = Readonly<{
    readonly tx?: BlePhy;
    readonly rx?: BlePhy;
}>;
/** Whether a platform boundary can truthfully dispatch a connection-control operation. */
export type ConnectionControlSupport = 'available' | 'unavailable';
/** Per-platform dispatch capabilities for the canonical connection-control surface. */
export interface ConnectionControlCapabilities {
    readonly rssi: ConnectionControlSupport;
    readonly requestMtu: ConnectionControlSupport;
    readonly effectiveMtu?: ConnectionControlSupport;
    readonly priority?: ConnectionControlSupport;
    readonly phy?: ConnectionControlSupport;
}
export interface RssiMeasurement<Attachment extends string, _Operation extends string> {
    readonly rssi: number;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
export interface MtuNegotiation<Attachment extends string, _Operation extends string> {
    readonly requestedMtu: number;
    readonly negotiatedMtu: number;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
/** Backend observation of the currently measured ATT MTU for this connection generation. */
export interface EffectiveMtuMeasurement<Attachment extends string, _Operation extends string> {
    readonly connectionId: ConnectionId<Attachment, string>;
    readonly connectionGeneration: GenerationId<'connection-generation', string>;
    readonly attMtu: number | null;
    readonly payloadBytes: number | null;
    readonly platformPduBytes: number | null;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
/** Backend result for a priority request; it does not assert observed link parameters. */
export interface ConnectionPriorityRequest<Attachment extends string, _Operation extends string> {
    readonly requested: ConnectionPriority;
    readonly accepted: boolean;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
export interface ConnectionPhyObservation<Attachment extends string, _Operation extends string> {
    readonly txPhy: BlePhy;
    readonly rxPhy: BlePhy;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
export interface ConnectionPhyRequest<Attachment extends string, _Operation extends string> {
    readonly requested: PhyPreference;
    readonly accepted: boolean;
    readonly observation: ConnectionPhyObservation<Attachment, _Operation> | null;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
export interface ConnectionWriteReadinessObservation<Attachment extends string> {
    readonly connectionId: ConnectionId<Attachment, string>;
    readonly connectionGeneration: GenerationId<'connection-generation', string>;
    readonly ready: boolean;
    readonly observedAtMonotonicMs: number;
    readonly ordinal: number;
}
export interface ConnectionWriteReadinessWatch<Attachment extends string> {
    readonly events: BoundedAsyncStream<ConnectionWriteReadinessObservation<Attachment>>;
    close(): Promise<CleanupRecord>;
}
/** Backend result for the connection-level write-length boundary. */
export interface ConnectionMaximumWriteLengthMeasurement<Attachment extends string, _Operation extends string> {
    readonly connectionId: ConnectionId<Attachment, string>;
    readonly connectionGeneration: GenerationId<'connection-generation', string>;
    readonly mode: WriteMode;
    readonly maximumWriteLength: number;
    readonly observedAtMonotonicMs: number;
    readonly terminal: OperationTerminalRecord<Attachment, string>;
}
export interface ReadRssiRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
}
export interface RequestMtuRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
    readonly requestedMtu: number;
}
export interface EffectiveMtuRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
}
export interface RequestPriorityRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
    readonly priority: ConnectionPriority;
}
export interface ReadPhyRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
}
export interface RequestPhyRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
    readonly preference: PhyPreference;
}
export interface ConnectionMaximumWriteLengthRequest<Attachment extends string, Operation extends string> {
    readonly operation: OperationOptions<Attachment, Operation>;
    readonly mode: WriteMode;
}
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