export type SlackBlock = Record<string, unknown>;
export interface SlackNormalizedBlockAction {
    actionId: string;
    blockId?: string;
    text?: string;
    type?: string;
    style?: string;
    url?: string;
    value?: string;
    parsedValue?: unknown;
    actionTs?: string;
}
export interface SlackBlockActionInboxEvent {
    channel: string;
    threadTs: string;
    userId: string;
    text: string;
    timestamp: string;
    metadata: Record<string, unknown>;
}
export interface SlackViewSubmissionInboxEvent {
    channel: string;
    threadTs: string;
    userId: string;
    text: string;
    timestamp: string;
    metadata: Record<string, unknown>;
}
export type SlackInteractiveInboxEvent = SlackBlockActionInboxEvent | SlackViewSubmissionInboxEvent;
export declare function normalizeSlackBlocksInput(blocks: unknown): SlackBlock[];
export declare function summarizeSlackBlocksForPolicy(blocks: unknown): string;
export declare function encodeSlackBlockActionValue(value: unknown): string;
export declare function extractSlackInteractivePayloadFromEnvelope(envelope: Record<string, unknown>): Record<string, unknown> | null;
export declare function extractSlackBlockActionsPayloadFromEnvelope(envelope: Record<string, unknown>): Record<string, unknown> | null;
export declare function normalizeSlackBlockActionPayload(payload: Record<string, unknown>): SlackBlockActionInboxEvent | null;
export declare function normalizeSlackViewSubmissionPayload(payload: Record<string, unknown>): SlackViewSubmissionInboxEvent | null;