import type { Envelope } from "@sentry/core";
import type { SentryErrorEvent, SentryEvent, SentryLogEvent, SentryTransactionEvent } from "../parser/types.js";
/**
 * Strongly-typed formatter functions (no type guards needed in implementation)
 */
export type ErrorFormatterFn = (event: SentryErrorEvent, envelopeHeader: Envelope[0]) => string[];
export type LogFormatterFn = (event: SentryLogEvent, envelopeHeader: Envelope[0]) => string[];
export type TraceFormatterFn = (event: SentryTransactionEvent, envelopeHeader: Envelope[0]) => string[];
/**
 * Registry entry that bundles the formatter with its type guard
 */
export type FormatterEntry<T extends SentryEvent> = {
    typeGuard: (event: SentryEvent) => event is T;
    format: (event: T, envelopeHeader: Envelope[0]) => string[];
};
/**
 * The formatter registry structure - this IS the formatters object
 */
export type FormatterRegistry = {
    event: FormatterEntry<SentryErrorEvent>;
    log: FormatterEntry<SentryLogEvent>;
    transaction: FormatterEntry<SentryTransactionEvent>;
};
/**
 * Available formatter types.
 * Add new formatters here as they are implemented.
 */
export type FormatterType = "md" | "logfmt" | "json" | "human";
/**
 * Runtime array of valid formatter types for validation.
 * Keep in sync with FormatterType.
 */
export declare const AVAILABLE_FORMATTERS: readonly FormatterType[];