import type { State } from './peer/state.js';
import type { Method } from './peer/method.js';
import type { JSONRPCError } from './errors.js';
import type { ErrorType, ValueType } from './types.js';
export declare const getValue: (o: any, field: string) => any;
export declare const errorObject: (err: JSONRPCError | ErrorType | string) => JSONRPCError | {
    code: number;
    message: string;
    data: ErrorType;
};
export declare const isState: <T extends ValueType>(stateOrMethod: State<T> | Method) => stateOrMethod is State<T>;