export interface ExistingRomFile {
    fileName: string;
    crcHash?: string;
    md5Hash?: string;
    sha1Hash?: string;
}
export interface UploadChecksums {
    crc32: string;
    md5: string;
    sha1: string;
}
export declare function buildDuplicateError(duplicateNames: string): Error;
export declare function isDuplicateError(error: unknown): boolean;
export declare function findDuplicateMatches(existingFiles: ExistingRomFile[], checksums: UploadChecksums): ExistingRomFile[];
export declare function shouldWarnDuplicateLookupFailure(error: unknown): boolean;
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