Paper 2025/569
Solving Data Availability Limitations in Client-Side Validation with UTxO Binding
, Cryptape, Cryptape and NervosAbstract
Issuing tokens on Bitcoin remains a highly sought-after goal, driven by its market dominance and robust security. However, Bitcoin's limited on-chain storage and functionality pose significant challenges. Among the various approaches to token issuance on Bitcoin, client-side validation (CSV) has emerged as a prominent solution. CSV delegates data storage and functionalities beyond Bitcoin’s native capabilities to off-chain clients, while leveraging the blockchain to validate tokens and prevent double-spending. Nevertheless, these protocols require participants to maintain token ownership and transactional data, rendering them vulnerable to data loss and malicious data withholding. In this paper, we propose UTxO binding, a novel framework that achieves both robust data availability and enhanced functionality compared to existing CSV designs. This approach securely binds a Bitcoin UTxO, which prevents double-spending, to a UTxO on an auxiliary blockchain, providing data storage and programmability. We formally prove its security and implement our design using Nervos CKB as the auxiliary blockchain.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Preprint.
- Keywords
- blockchainclient-side validation
- Contact author(s)
-
yunwen @ cryptape com
cipher @ nervos org
ren @ cryptape com - History
- 2025-04-01: approved
- 2025-03-28: received
- See all versions
- Short URL
- https://ia.cr/2025/569
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2025/569,
author = {Yunwen Liu and Bo Wang and Ren Zhang},
title = {Solving Data Availability Limitations in Client-Side Validation with {UTxO} Binding},
howpublished = {Cryptology {ePrint} Archive, Paper 2025/569},
year = {2025},
url = {https://eprint.iacr.org/2025/569}
}
