Stellar releases Open-Source Private Payments PoC using Groth16 zk proofs for private deposits, transfers, and withdrawals. Stellar adds ASP membership and non-Stellar releases Open-Source Private Payments PoC using Groth16 zk proofs for private deposits, transfers, and withdrawals. Stellar adds ASP membership and non-

Stellar Introduces Open-Source Private Payments with Advanced ZK Safeguards

For feedback or concerns regarding this content, please contact us at crypto.news@mexc.com
  • Stellar releases Open-Source Private Payments PoC using Groth16 zk proofs for private deposits, transfers, and withdrawals.
  • Stellar adds ASP membership and non-membership Merkle trees, allowing pools to enforce allow/block rules without revealing transaction details.

Stellar has released an open-source proof of concept for private payments on its network. The prototype enables token deposits, transfers, and withdrawals while keeping amounts and sender-receiver links out of public view. 

The private payments flow uses Groth16 zero-knowledge proofs built with Circom circuits. Proof generation runs on the client side through WebAssembly, allowing users to create proofs in a web browser. The system runs on Soroban smart contracts and uses a pool model that tracks commitments, similar to UTXO notes.

Users deposit tokens into the pool and receive a new commitment. No earlier notes are spent during a deposit. Transfers spend existing commitments and create new ones tied to a new public key, without exposing the transfer details. Withdrawals spend notes and release tokens from the pool. A “transact” option is available for users who want to build custom transactions within the same private payment rules.

Stellar’s ASP Controls and ZK Privacy

Stellar’s Private Payments prototype introduces administrative security by Association Set Providers (ASPs). ASPs manage two Merkle tree systems that support policy checks without revealing user activity. One tree tracks approved public keys through a membership structure, while the other tracks blocked public keys through a non-membership structure. 

Using these trees, one can demonstrate that a transaction meets regulatory standards and avoids blocked sets, while the payment information remains confidential.

The demo bundle consists of the frontend, the circuits, and Soroban smart contracts. The user interface is built on the frontend, which also includes an ASP admin page that supports adding public keys to the membership tree and managing an exclusion list. Key insertions must be signed by an ASP administrator account, even when the interface can derive keys for any account for testing.

The circuit logic checks several conditions in a single proof. It prevents double-spending and validates Merkle proofs for commitments. It also enforces correct output commitments and balance conservation, where inputs equal outputs plus any public amount. On-chain elements involve a pool contract where deposits, transfers, and withdrawals are made, and a Groth16 verifier contract from which proof is retrieved. 

Stellar has similarly broadened wallet accessibility in rising markets by partnering with TopNod to roll out a non-custodial wallet in Asia, Africa, and Latin America. As we covered, the integration is built on key sharding and Trusted Execution Environment technology to eliminate seed phrases and is centered on stablecoins and tokenized real-life assets.

At the time of reporting, Stellar (XLM) was trading at $0.1702, up 8% in a day, while 24-hour trading volume was up 10%.

]]>
Market Opportunity
ZKsync Logo
ZKsync Price(ZK)
$0.0101
$0.0101$0.0101
0.00%
USD
ZKsync (ZK) Live Price Chart

World Cup Combo: Aim for 200x

World Cup Combo: Aim for 200xWorld Cup Combo: Aim for 200x

Combine up to 20 World Cup matches in one order

Disclaimer: The articles reposted on this site are sourced from public platforms and are provided for informational purposes only. They do not necessarily reflect the views of MEXC. All rights remain with the original authors. If you believe any content infringes on third-party rights, please contact crypto.news@mexc.com for removal. MEXC makes no guarantees regarding the accuracy, completeness, or timeliness of the content and is not responsible for any actions taken based on the information provided. The content does not constitute financial, legal, or other professional advice, nor should it be considered a recommendation or endorsement by MEXC.

You May Also Like

[Rear View] The President needs to reclaim the narrative

[Rear View] The President needs to reclaim the narrative

The President is not merely in trouble after his administration’s near-total failure to own the narrative of its presidency. At this point, he has lost control
Share
Rappler2026/06/30 08:00
CME Group to launch Solana and XRP futures options in October

CME Group to launch Solana and XRP futures options in October

The post CME Group to launch Solana and XRP futures options in October appeared on BitcoinEthereumNews.com. CME Group is preparing to launch options on SOL and XRP futures next month, giving traders new ways to manage exposure to the two assets.  The contracts are set to go live on October 13, pending regulatory approval, and will come in both standard and micro sizes with expiries offered daily, monthly and quarterly. The new listings mark a major step for CME, which first brought bitcoin futures to market in 2017 and added ether contracts in 2021. Solana and XRP futures have quickly gained traction since their debut earlier this year. CME says more than 540,000 Solana contracts (worth about $22.3 billion), and 370,000 XRP contracts (worth $16.2 billion), have already been traded. Both products hit record trading activity and open interest in August. Market makers including Cumberland and FalconX plan to support the new contracts, arguing that institutional investors want hedging tools beyond bitcoin and ether. CME’s move also highlights the growing demand for regulated ways to access a broader set of digital assets. The launch, which still needs the green light from regulators, follows the end of XRP’s years-long legal fight with the US Securities and Exchange Commission. A federal court ruling in 2023 found that institutional sales of XRP violated securities laws, but programmatic exchange sales did not. The case officially closed in August 2025 after Ripple agreed to pay a $125 million fine, removing one of the biggest uncertainties hanging over the token. This is a developing story. This article was generated with the assistance of AI and reviewed by editor Jeffrey Albus before publication. Get the news in your inbox. Explore Blockworks newsletters: Source: https://blockworks.co/news/cme-group-solana-xrp-futures
Share
BitcoinEthereumNews2025/09/17 23:55
Gold Slips Toward $4,000 as Persistent Inflation Data Bolsters Higher Rate Expectations

Gold Slips Toward $4,000 as Persistent Inflation Data Bolsters Higher Rate Expectations

BitcoinWorld Gold Slips Toward $4,000 as Persistent Inflation Data Bolsters Higher Rate Expectations Gold prices edged lower in early trading, approaching the
Share
bitcoinworld2026/06/30 07:50