import { PassThrough, type Transform } from 'node:stream';
import { type JsonValue } from 'type-fest';
import { type WhookRequestBodySpec } from './body.js';
export type WhookParser = (content: string, bodySpec?: WhookRequestBodySpec) => JsonValue;
export type WhookParsers = Record<string, WhookParser>;
export type WhookStringifyer = (content: string) => string;
export type WhookStringifiers = Record<string, WhookStringifyer>;
export type WhookEncoder<T extends Transform = Transform> = () => T;
export type WhookEncoders<T extends Transform = Transform> = Record<string, WhookEncoder<T>>;
export type WhookDecoder<T extends Transform = Transform> = () => T;
export type WhookDecoders<T extends Transform = Transform> = Record<string, WhookDecoder<T>>;
export declare const DEFAULT_DEBUG_NODE_ENVS: string[];
export declare const DEFAULT_BUFFER_LIMIT = "500kB";
export declare const DEFAULT_PARSERS: {
    'text/plain': (content: string) => JsonValue;
    'application/json': (content: string) => JsonValue;
    'application/x-www-form-urlencoded': (content: string) => JsonValue;
};
export declare const DEFAULT_STRINGIFIERS: {
    'text/plain': typeof ensureString;
    'application/json': (content: JsonValue) => string;
    'application/x-www-form-urlencoded': (content: JsonValue) => string;
};
export declare const DEFAULT_DECODERS: {
    'utf-8': () => PassThrough;
};
export declare const DEFAULT_ENCODERS: {
    'utf-8': () => PassThrough;
};
declare function ensureString(maybeString: unknown): string;
export {};