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In recent work, LB\u2010Chain proposes a framework for load balancing by dynamically migrating hot accounts, which significantly improves throughput and latency. However, the approach still suffers from the computational overhead associated with frequent full ordering, which limits its efficiency in large\u2010scale systems. To address this issue, this paper proposes an enhanced sharding framework, DH\u2010Chain, which improves computational efficiency by introducing heap sorting optimization, dynamically managing the load of sharding and accounts, and avoiding full\u2010volume sorting during each round of migration. The experimental results show that DH\u2010Chain achieves 3.2% higher throughput than LB\u2010Chain and 11.4% higher than random allocation, approaching the theoretical upper bound of ideal allocation. By leveraging heap\u2010based sorting and two\u2010phase commit protocols, DH\u2010Chain ensures atomicity and security while reducing computational overhead. The framework effectively balances shard loads, maintaining consistent performance across varying transaction loads and demonstrating robust scalability.<\/jats:p>","DOI":"10.1002\/cpe.70586","type":"journal-article","created":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T02:40:08Z","timestamp":1770259208000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["<scp>DH<\/scp>\n                    \u2010Chain: Double Heap Based Blockchain Sharding Framework"],"prefix":"10.1002","volume":"38","author":[{"given":"Chen","family":"Wang","sequence":"first","affiliation":[{"name":"School of Computer Science and Engineering (School of Cyber Security) University of Electronic Science and Technology of China (UESTC)  Chengdu China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9851-666X","authenticated-orcid":false,"given":"Hu","family":"Xia","sequence":"additional","affiliation":[{"name":"School of Computer Science and Engineering (School of Cyber Security) University of Electronic Science and Technology of China (UESTC)  Chengdu China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7014-6417","authenticated-orcid":false,"given":"Jianbin","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Computer Science and Engineering (School of Cyber Security) University of Electronic Science and Technology of China (UESTC)  Chengdu China"},{"name":"Key Laboratory of Intelligent Space TTC&amp;O (Space Engineering University) Ministry of Education  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7921-7792","authenticated-orcid":false,"given":"Qi","family":"Xia","sequence":"additional","affiliation":[{"name":"School of Computer Science and Engineering (School of Cyber Security) University of Electronic Science and Technology of China (UESTC)  Chengdu China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,2,4]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"crossref","unstructured":"X.Luo Z.Xu K.Xue Q.Jiang R.Li andD.Wei \u201cScalaCert: Scalability\u2010Oriented PKI With Redactable Consortium Blockchain Enabled \u201cOn\u2010Cert\u201d Certificate Revocation \u201din Proceedings of the IEEE 42nd International Conference on Distributed Computing Systems 2022 1236\u20131246.","DOI":"10.1109\/ICDCS54860.2022.00121"},{"key":"e_1_2_13_3_1","doi-asserted-by":"crossref","unstructured":"Z.Xu X.Luo K.Xue D.Wei andR.Li \u201cSEREDACT: Secure and Efficient Redactable Blockchain With Verifiable Modification \u201din Proceedings of the IEEE 43rd International Conference on Distributed Computing Systems 2023 818\u2013828.","DOI":"10.1109\/ICDCS57875.2023.00090"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jksuci.2022.03.007"},{"key":"e_1_2_13_5_1","unstructured":"S.Nakamoto \u201cBitcoin: A Peer\u2010to\u2010Peer Electronic Cash System \u201d2008 http:\/\/www.bitcoin.org\/bitcoin.pdf."},{"key":"e_1_2_13_6_1","doi-asserted-by":"crossref","unstructured":"L.Luu V.Narayanan C.Zheng K.Baweja S.Gilbert andP.Saxena \u201cA Secure Sharding Protocol For Open Blockchains \u201din Proceedings of the ACM SIGSAC Conference on Computer and Communications Security 2016 17\u201330.","DOI":"10.1145\/2976749.2978389"},{"issue":"10","key":"e_1_2_13_7_1","doi-asserted-by":"crossref","first-page":"2582","DOI":"10.1109\/TPDS.2021.3071176","article-title":"LightChain: Scalable DHT\u2010Based Blockchain","volume":"32","author":"Hassanzadeh\u2010Nazarabadi Y.","year":"2021","journal-title":"IEEE Transactions on Parallel and Distributed Systems"},{"key":"e_1_2_13_8_1","doi-asserted-by":"publisher","DOI":"10.1109\/TPDS.2022.3227198"},{"key":"e_1_2_13_9_1","unstructured":"C.Li P.Li andD.Zhou \u201cA Decentralized Blockchain With High Throughput and Fast Confirmation \u201din Proceedings of the USENIX Annual Technical Conference 2020 515\u2013528."},{"key":"e_1_2_13_10_1","doi-asserted-by":"crossref","unstructured":"H.Dang T. 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