import type { ChatFinishReason } from "../../chat/protocol.js";
import type { ChatUiMessage, ChatUiMessageChunk, MessageMetadata } from "../../chat/types.js";
/** Public API contract for chat UI message stream finish part. */
export type ChatUiMessageStreamFinishPart = {
    type: "finish";
    finishReason: ChatFinishReason;
    rawFinishReason: ChatFinishReason;
    totalUsage: {
        inputTokens: number;
        outputTokens: number;
        totalTokens: number;
        inputTokenDetails: {
            noCacheTokens?: number;
            cacheReadTokens?: number;
            cacheWriteTokens?: number;
        };
        outputTokenDetails: {
            textTokens?: number;
            reasoningTokens?: number;
        };
        billableInputTokens?: number;
        billableOutputTokens?: number;
        costUsd?: number;
        providerInputCostUsd?: number;
        providerOutputCostUsd?: number;
        providerCostUsd?: number;
        veryfrontInputChargeUsd?: number;
        veryfrontOutputChargeUsd?: number;
        veryfrontChargeUsd?: number;
        veryfrontBilledUsd?: number;
        costCredits?: number;
        costSource?: "gateway" | "missing" | "partial";
        billingMode?: "direct" | "deferred";
        usageCaptureStatus?: "complete" | "partial" | "missing";
    };
};
/** Public API contract for chat UI message stream finish. */
export type ChatUiMessageStreamFinish<TMessageMetadata = MessageMetadata> = {
    messages: Array<ChatUiMessage<TMessageMetadata>>;
    isContinuation: false;
    responseMessage: ChatUiMessage<TMessageMetadata>;
    isAborted: false;
    finishReason: ChatFinishReason;
};
/** Options accepted by chat UI message stream. */
export type ChatUiMessageStreamOptions<TMessageMetadata = MessageMetadata> = {
    generateMessageId?: () => string;
    sendReasoning?: boolean;
    onError?: (error: unknown) => string;
    messageMetadata?: (input: {
        part: ChatUiMessageStreamFinishPart;
    }) => TMessageMetadata | undefined;
    onFinish?: (finish: ChatUiMessageStreamFinish<TMessageMetadata>) => void | Promise<void>;
    onOrphanedToolInput?: (input: {
        toolCallId: string;
        inputText: string;
    }) => void;
};
/** Create chat UI message stream from data stream. */
export declare function createChatUiMessageStreamFromDataStream<TMessageMetadata = MessageMetadata>(input: {
    stream: ReadableStream<Uint8Array>;
}, options?: ChatUiMessageStreamOptions<TMessageMetadata>): AsyncIterable<ChatUiMessageChunk<MessageMetadata>>;
//# sourceMappingURL=chat-ui-message-stream.d.ts.map