import type { BytesSource } from "./bytes-source";
import { CID, type MultihashDigest } from "multiformats/cid";
import { EOF_MARK } from "./eof-mark.js";
import type { Opaque } from "../ancillary/opaque";
import type { IBlock } from "../block.js";
import { CarVersion } from "../car-version.js";
import type { HasherContainer } from "../codename-container.js";
export type IBlockHeader = {
    cid: CID;
    payloadLength: number;
    encodedLength: number;
};
export declare function readVarint(bytesSource: BytesSource): number;
export declare function readVarintSafe(bytesSource: BytesSource): number | EOF_MARK;
export declare function readMultihash(bytesSource: BytesSource): MultihashDigest;
export declare function readCID(bytesSource: BytesSource): CID;
export type HeaderV1 = {
    version: 1;
    roots: Array<CID>;
};
export type HeaderV2Characteristics = Opaque<[bigint, bigint], "HeaderV2Characteristics">;
export type HeaderV2 = {
    version: 2;
    roots: Array<CID>;
    characteristics: HeaderV2Characteristics;
    dataOffset: number;
    dataSize: number;
    indexOffset: number;
};
export type CarHeader = HeaderV1 | HeaderV2;
export declare function readHeader(bytesSource: BytesSource): CarHeader;
export declare function readHeader(bytesSource: BytesSource, version: CarVersion.TWO): HeaderV2;
export declare function readHeader(bytesSource: BytesSource, version: CarVersion.ONE): HeaderV1;
export declare function readBlockHeader(bytesSource: BytesSource): IBlockHeader | EOF_MARK;
export declare function readBlock(bytesSource: BytesSource, hashers: HasherContainer, verify?: boolean): IBlock | EOF_MARK;
export declare function readBlocks(bytesSource: BytesSource, hashers: HasherContainer, verify?: boolean): Generator<IBlock>;
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