import { SmartContractLib, Sha256, ByteString } from 'scrypt-ts';
import { MerkleProof } from './merklePath';
export type BlockHeader = {
    version: ByteString;
    prevBlockHash: Sha256;
    merkleRoot: Sha256;
    time: bigint;
    bits: ByteString;
    nonce: bigint;
};
export declare class Blockchain extends SmartContractLib {
    static readonly BLOCK_HEIGHT_POS: bigint;
    static txInBlock(txid: Sha256, bh: BlockHeader, merkleProof: MerkleProof, depth: number): boolean;
    static lastTxInBlock(txid: Sha256, bh: BlockHeader, merkleProof: MerkleProof, depth: number): boolean;
    static isValidBlockHeader(bh: BlockHeader, blockchainTarget: bigint): boolean;
    static verifyBlockHeader(bh: BlockHeader): boolean;
    static isCoinbase(tx: ByteString): boolean;
    static blockHeight(bh: BlockHeader, coinbaseTx: ByteString, merkleProof: MerkleProof, depth: number): bigint;
    static readBlockHeight(coinbaseTx: ByteString): bigint;
    static bits2Target(bits: ByteString): bigint;
    static serialize(bh: BlockHeader): ByteString;
    static deserialize(bh: ByteString): BlockHeader;
    static blockHeaderHash(bh: BlockHeader): Sha256;
    static blockHeaderHashAsInt(bh: BlockHeader): bigint;
}