import { ChatCompletionChunkMessage, ChatCompletionContentPart, ChatCompletionMessage, ChatCompletionMessageToolCall, ChatCompletionResponseMessage, InputContentPart, InputMessage } from '../types';
export declare function isRateLimitError(e: any): boolean;
export declare function normalizeContentParts(content: string | InputContentPart[]): string | ChatCompletionContentPart[];
export declare function inputMessageToChatCompletionMessage(message: InputMessage): ChatCompletionMessage;
export declare function mergeToolCalls(chunks: ChatCompletionChunkMessage[]): ChatCompletionMessageToolCall[] | null;
export declare function mergeChatCompletionChunks(chunks: ChatCompletionChunkMessage[]): ChatCompletionResponseMessage[];