import type { CallerIdentity } from "../../gateway/session-comm-guards.js";
import type { TalkApprovalRepository } from "./repository.js";
export interface TodoApprovalSnapshot {
    todoId: string;
    todoVersion: number;
    approvalId: string;
    request: string;
    options: string[] | null;
    state: "pending" | "approved" | "rejected";
}
export interface TodoApprovalPort {
    snapshot: (id: string) => TodoApprovalSnapshot | null;
    decide: (input: {
        id: string;
        decision: "approve" | "reject";
        choice?: string;
    }) => {
        ok: boolean;
        version?: number;
        code?: string;
        message?: string;
    };
}
interface ServiceOptions {
    repository: TalkApprovalRepository;
    todo: TodoApprovalPort;
    now?: () => number;
    ttlMs?: number;
}
type ApprovalFailure = {
    ok: false;
    code: string;
    error: string;
    replayed?: boolean;
};
type ApprovalCommit = {
    ok: true;
    receiptId: string;
    replayed: boolean;
    challengeId: string;
    todoId: string;
    decision: "approve" | "reject";
    choice?: string;
    transcript: string;
    version: number;
};
interface BoundInput {
    talkSessionId: string;
    browserInstanceId: string;
    credentialGeneration: number;
    providerCallId: string;
    providerToolItemId?: string;
    providerToolEventId?: string;
    providerTranscriptItemId: string;
    caller: CallerIdentity;
}
export declare class TalkApprovalService {
    private readonly repository;
    private readonly todo;
    private readonly now;
    private readonly ttlMs;
    constructor(options: ServiceOptions);
    prepareTodo(input: BoundInput & {
        todoId: string;
    }): ApprovalFailure | {
        ok: true;
        replayed: boolean;
        challengeId: string;
        expiresAt: number;
        todoId: string;
        request: string;
        allowedUtterances: string[];
    };
    commitTodo(input: BoundInput & {
        challengeId: string;
    }): ApprovalFailure | ApprovalCommit;
    private commitNew;
    private applyDecision;
    private validateCommit;
    private refuse;
    private audit;
}
export {};
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