import type { JsonRpcEngineEndCallback } from "@metamask/json-rpc-engine";
import type { Messenger } from "@metamask/messenger";
import type { PermissionControllerHasPermissionAction } from "@metamask/permission-controller";
import type { SendWebSocketMessageParams, SendWebSocketMessageResult } from "@metamask/snaps-sdk";
import type { InferMatching } from "@metamask/snaps-utils";
import type { PendingJsonRpcResponse } from "@metamask/utils";
import type { JsonRpcRequestWithOrigin, WebSocketServiceSendMessageAction } from "../types.cjs";
export type SendWebSocketMessageMethodActions = PermissionControllerHasPermissionAction | WebSocketServiceSendMessageAction;
declare const SendWebSocketMessageParametersStruct: import("@metamask/superstruct").Struct<{
    id: string;
    message: string | number[];
}, {
    id: import("@metamask/superstruct").Struct<string, null>;
    message: import("@metamask/superstruct").Struct<string | number[], [head: import("@metamask/superstruct").Struct<string, null>, import("@metamask/superstruct").Struct<number[], import("@metamask/superstruct").Struct<number, null>>]>;
}>;
export type SendWebSocketMessageParameters = InferMatching<typeof SendWebSocketMessageParametersStruct, SendWebSocketMessageParams>;
/**
 * Send a message to an open WebSocket connection. The message will be sent to
 * the WebSocket connection with the specified ID, which must have been
 * previously opened by the Snap using the [`snap_openWebSocket`](https://docs.metamask.io/snaps/reference/snaps-api/snap_openwebsocket/)
 * method.
 *
 * @example
 * ```json name="Manifest"
 * {
 *   "initialPermissions": {
 *     "endowment:network-access": {}
 *   }
 * }
 * ```
 * ```ts name="Usage"
 * await wallet.request({
 *   method: 'snap_sendWebSocketMessage',
 *   params: {
 *     id: 'websocket-connection-id',
 *     message: 'Hello, WebSocket!', // or message: [1, 2, 3] for binary data
 *   },
 * });
 * ```
 */
export declare const sendWebSocketMessageHandler: {
    implementation: typeof sendWebSocketMessageImplementation;
    actionNames: ("WebSocketService:sendMessage" | "PermissionController:hasPermission")[];
};
/**
 * The `snap_sendWebSocketMessage` method implementation.
 *
 * @param req - The JSON-RPC request object.
 * @param res - The JSON-RPC response object.
 * @param _next - The `json-rpc-engine` "next" callback. Not used by this function.
 * @param end - The `json-rpc-engine` "end" callback.
 * @param _hooks - The RPC method hooks. Not used by this function.
 * @param messenger - The messenger used to call controller actions.
 * @returns Nothing.
 */
declare function sendWebSocketMessageImplementation(req: JsonRpcRequestWithOrigin<SendWebSocketMessageParameters>, res: PendingJsonRpcResponse<SendWebSocketMessageResult>, _next: unknown, end: JsonRpcEngineEndCallback, _hooks: never, messenger: Messenger<string, SendWebSocketMessageMethodActions>): Promise<void>;
export {};
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