# protocol exploit — X 热门讨论 (2026-09-25 11:16 UTC)

## @MagicEden (Magic Eden 🪄) · 09-25 10:44 · ♥60 ↻16 💬34 We are sharing an interim update regarding an exploit identified with @limitbreak Payment Processor V2, a NFT trading protocol maintained by the company Limit Break and which Magic Eden adopted to settle trades on EVM in 2024.

Magic Eden stopped using Payment Processor V2 in Oct 2024 and ceased our EVM marketplace altogether in Q1 2026. No live Magic Eden listings were impacted in this exploit. We will provide more updates as we investigate the impact further.

We are also contacting Limit Break as they are the owner & maintainer of the protocol to see what other mitigations can be done, including progress on pausing transfers on the protocol. Thank you to @0xQuit for the whitehat rescue and for bringing this to our collective attention: https://t.co/vXwUS5laJE

Why are ME listings being shown to be involved? NFTs listed on ME EVM from approx Feb 2024 to Oct 2024 could be impacted by this issue with the Limit Break Payment Processor v2 contract. Any listings on ME EVM after Oct 2024 should not be impacted here. We are still further refining our investigation and will provide more updates here.

In the meantime, if you listed or traded NFTs on Magic Eden’s EVM marketplace before we shut it down, revoke this contract:

Limit Break: Payment Processor (V2)

0x9A1D00bEd7CD04BCDA516d721A596eb22Aac6834

Go through our instructions here: https://t.co/34d0BQ6rh9 Ethereum → filter that address → revoke every NFT “approved for all” row

Repeat for the following chainsPolygon Base

See also 0xQuit’s tweet on revocation for further reference also: https://t.co/9guRvUZK1e

NOTE: Revoking does not return tokens that already moved.

Again, we will keep the community updated as we investigate further. > 引用 @0xQuit: Payment Processor V2 on Ethereum: 0x9A1D00bEd7CD04BCDA516d721A596eb22Aac6834 Payment Processor V3 on ApeChain: 0x9a1D00000000fC540e2000560054812452eB5366

use https://t.co/kDGERRJXtd or similar. https://x.com/MagicEden/status/2103435423389241569

## @jbondwagon (JBond) · 09-25 10:15 · ♥43 ↻2 💬6 Below are the known incidents when Quit and Yuga led whitehat/recovery operations to save NFTs from exploits: 1️⃣ NFT recovery operations with the hacker of NFT Trader exploit 2️⃣ Whitehat on Flooring Protocol exploit 3️⃣ Whitehat on Magic Eden exploit

Take a bow, @0xQuit. GN! 🙇‍♂️ https://t.co/feHdc0niKM > 引用 @0xQuit: kids should be waking up in a half hour or so, so gn ct https://x.com/jbondwagon/status/2103428066752290855

## @cryptofishx (fish) · 09-25 10:31 · ♥35 ↻3 💬9 Why Crypto Stopped Innovating (And How We Fix It) https://x.com/cryptofishx/status/2103432194823770587

## @0xchainink (Chain INK) · 09-25 10:49 · ♥30 ↻7 💬4 $QNT : Review 📜

What if seven of Britain's biggest banks quietly moved real customer money over the same infrastructure on the same day America's largest clearing house picked it too?

Meet Quant, an enterprise interoperability platform whose Overledger gateway connects 74 blockchains to legacy banking systems without bridges or wrapped tokens.

On 24 September, Barclays, HSBC, and five other UK banks settled live customer transactions on it, and The Clearing House named it the layer for tokenised deposits across US finance.

Let's explore the month the pilots became production. 👇

⚪ Quant at a Glance

Marketplace Insight: Quant spent years accumulating institutional credentials that nobody could measure, and on 24 September that changed twice in one day. Seven UK banks, including Barclays, HSBC, Lloyds, and NatWest, processed live customer transactions on tokenised sterling deposits running on Quant-built infrastructure, with remortgage completions where funds locked and released automatically while still earning interest.

Hours later, The Clearing House, owned by 25 of the largest US banks and clearing over $2 trillion daily, named Quant as the interoperability layer for its On-Chain Money Initiative connecting to RTP and CHIPS. The clean contrast is that the adoption question has been answered and the token question has not. Quant is now embedded in both UK and US payment infrastructure, and it is still unclear how much of that revenue reaches QNT.

⚪ Mission

Quant exists to make blockchains reachable by the institutions that will never run one. The founding argument, which Verdian arrived at working in healthcare, is that fragmentation is the real barrier: patients registered on different systems fall through the gaps, and the same holds for banks, payment networks, and central banks operating incompatible ledgers. Overledger's answer is an API layer sitting above every chain rather than another chain competing with them, so an institution integrates once and reaches everything, with no bridge to exploit and no wrapped asset to depeg.

🔵 A Brief History

Quant was founded by Gilbert Verdian, whose background reads unusually for crypto. He served as Chief Information Security Officer at Vocalink, the Mastercard company that runs much of the UK's payment infrastructure, as security lead at the UK Ministry of Justice, and in roles across HM Treasury, the Cabinet Office, PwC, and HSBC, alongside CIO and CISO positions in Australian health services. He also convened an ISO TC307 working group on blockchain interoperability, which is standards-body participation rather than a marketing claim.

The company formed around 2015 with the Overledger concept, and QNT launched in 2018 through an ICO that sold 9.9 million tokens, with 2.6 million to company reserve, 1.3 million to founders, and 651,000 to advisors. The token peaked at $428.45 in September 2021 before declining alongside the broader market.

The institutional work continued regardless of price. Quant participated in Project Rosalind, the BIS Innovation Hub London Centre experiment with the Bank of England on retail CBDC API design, and aligned Overledger with ISO 20022, the messaging standard banks actually use. 2026 was the year the pilots became production. March brought a partnership with Murex, embedding tokenised deposits and digital corporate bonds into institutional trading workflows.

The Fusion Rollup went live on mainnet on 2 June, connecting 74 blockchains under a single institutional layer. Then on 24 September, two announcements landed together. UK Finance confirmed that seven banks, Barclays, HSBC UK, Lloyds Banking Group, Monzo, Nationwide, NatWest, and Santander, had completed the first live customer transactions on the GBTD platform Quant built, covering two remortgage completions where funds were locked and released automatically at completion while continuing to earn interest, and a marketplace purchase where payment released only once goods were exchanged.

The same day, The Clearing House selected Quant to power its On-Chain Money Initiative, providing the interoperability, orchestration, and transaction-management layer for clearing and settling tokenised deposits among US financial institutions, connecting into RTP and CHIPS and offering Tokenised Deposits-as-a-Service to banks lacking their own capability. TCH is owned by 25 of the largest US banks and processes over $2 trillion in daily volume, with the network targeted to go live in H1 2027. Verdian described it as a defining step in the global transition to programmable money. QNT rose sharply over the following two days.

🔵 Ecosystem Narrative

The organizing idea is that institutions need one integration rather than many, and that the connector should not be another chain.

➛ Overledger's three-layer architecture. A blockchain layer handling native transaction logic per network, a gateway layer managing communication and query routing, and an application layer where multi-chain applications run, keeping each function modular.

➛ Live tokenised sterling at seven banks. Barclays, HSBC UK, Lloyds, Monzo, Nationwide, NatWest, and Santander processing real customer transactions on GBTD, with programmable conditions handling remortgage completions and escrowed marketplace purchases, and further pilots planned linking tokenised deposits to digital assets and bond issuance around 2027.

➛ The Clearing House On-Chain Money Initiative. Quant orchestrating tokenised deposit clearing and settlement across US financial institutions, connecting to RTP and CHIPS, with a Tokenised Deposits-as-a-Service layer for banks that process through TCH but lack their own capability.

➛ No bridges, no wrapped tokens. Overledger connects chains through APIs rather than locking assets in contracts, which removes the attack surface that has produced most of crypto's largest exploits.

➛ The Fusion Rollup. Live since June 2026, connecting 74 blockchains under one institutional layer with atomic cross-chain settlement, designed for consortia rather than for scaling any single network.

➛ Standards and capital markets. ISO 20022 alignment, BIS Project Rosalind participation with the Bank of England, and a live repo against a tokenised bond demonstrated inside Murex MX.3 at Sibos, including a mid-execution kill and full rollback.

⚪ Token Utilities

$QNT functions as a licence and access token rather than as gas.

➛ Annual licensing fees: enterprises and developers pay yearly licensing in QNT to use Overledger, the primary intended demand driver.

➛ Developer access: building a multi-chain application requires holding a specified amount of QNT.

➛ Trusted Node Staking: operators lock QNT to run gateways, earning around 8% and removing supply from circulation.

➛ Note on scope: Quant permits certain platform fees to be settled in traditional currency, so technology adoption does not automatically translate into QNT demand.

⚪ Key Features

➛ An API gateway connecting 74 blockchains without bridges or wrapped assets.

➛ Live tokenised sterling deposits at seven UK banks with programmable settlement conditions.

➛ Selected as the interoperability layer for The Clearing House's tokenised deposit network.

➛ ISO 20022 alignment and BIS central bank experiment participation.

➛ A fixed supply with no inflation and a high circulating percentage.

➛ Trusted Node Staking locking supply at roughly 8% yield.

🔵 Meet the Team

Quant's bench is organised around delivery and commercial expansion rather than early-stage building, which fits a company whose product is now settling customer money at UK banks.

▶️ Core Members:

➛ Gilbert Verdian [ @gverdian ] - Founder and CEO | The credential set is exceptional for this industry. He served as Chief Information Security Officer at Vocalink, the Mastercard company operating core UK payment infrastructure, as security lead at the UK Ministry of Justice, and across HM Treasury, the Cabinet Office, PwC, and HSBC, with earlier CIO and CISO roles in Australian health systems. He convened an ISO TC307 working group on blockchain interoperability, meaning he helped write the standards rather than merely citing them. That background explains why banks and central banks take meetings.

➛ Martin Hargreaves - CPO | Owns product direction across Overledger and the Fusion Rollup, the architecture now carrying live customer transactions for seven UK banks and slated to orchestrate tokenised deposit settlement for The Clearing House. He also represents Quant publicly in institutional forums, including UK Finance's Tokenised Markets and Money Conference panel on next-generation deposits.

➛ Lenna Russ - CCO | Runs the commercial side, the function that converts institutional interest into signed deployments, which is the exact bottleneck between Quant's credentials and its revenue.

➛ Dr Luke Riley - Head of Innovation | Leads research and forward architecture, the work behind Fusion's multi-ledger design and the programmable settlement features now handling conditional releases in live remortgage completions.

➛ Theodore Sentelidis - Head of Technology | Owns technical delivery across the Overledger stack, the layer seven UK banks and shortly The Clearing House depend on for orchestration and transaction management.

➛ Kirat Rawel - Head of Regional Sales, APAC | Drives expansion into Asia-Pacific, a signal that Quant is pushing beyond its UK and US footholds rather than consolidating around them.

🔵 Ratings

➛ Use Case: ★★★★⯪ (4.5/5). Quant has moved from institutional positioning to production deployment, and the evidence arrived in a single day. Seven UK banks including Barclays, HSBC, Lloyds, and NatWest processed live customer transactions on tokenised sterling deposits built by Quant, with programmable settlement handling remortgage completions and escrowed purchases. The Clearing House, owned by 25 of the largest US banks and clearing over $2 trillion daily, selected Quant as the interoperability layer for its On-Chain Money Initiative connecting to RTP and CHIPS. Add the Fusion Rollup connecting 74 chains without bridges, ISO 20022 alignment, Murex integration, and BIS Project Rosalind participation, and the institutional footprint is unmatched in this category. The 0.5-point deduction is timing and disclosure: the TCH network does not go live until H1 2027, GBTD remains early in volume terms, and Quant still publishes no usage metrics.

➛ Tokenomics: ★★★★ (4/5). The supply structure is among the tightest in crypto. A fixed maximum around 14.6 million tokens, zero inflation, no emissions schedule, and a high circulating percentage leaving almost no dilution ahead, which is cleaner than most tokens twice its age. Utility is structural rather than decorative: enterprises pay annual licensing in QNT, developers must hold it to build multi-chain applications, and Trusted Node Staking locks supply at roughly 8% yield while Treasury Reserve distributions reward holders and stakers. If the TCH and GBTD deployments scale, licensing demand scales with them against a supply that cannot grow. The 1-point deduction is disclosure around value capture. Quant permits certain platform fees to be settled in traditional currency, so it is unclear how much institutional adoption converts into token demand, roughly 2 million tokens sit with the company unlocked, and circulating supply figures conflict across major trackers.

➛ Audits: ★★★⯪ (3.5/5). Quant holds a verified CertiK Skynet Score of 77.07, grade BBB, with seven passed security checks against three medium-severity alerts. The deeper security argument is architectural: Overledger connects chains through APIs rather than bridges or wrapped assets, which structurally eliminates the attack surface responsible for the largest losses in crypto history, and the ERC-20 token has run since 2018 without a headline exploit. Verdian's own background is in cybersecurity, and ISO standards participation implies process discipline. The 1.5-point deduction is the grade and the visibility. BBB is two bands below the AA scores that earn 4.5, three medium alerts remain unresolved, and most of Overledger is proprietary off-chain enterprise software that no external party can review, which matters more now that UK and US banks are settling customer money through it.

➛ Community: ★★★★ (4/5). Quant's holder base has been unusually patient, sitting through a 76% drawdown and years of pilot announcements that never produced disclosed revenue, and that patience was validated in September when the pilots became live bank transactions. The rally that followed, roughly 44% in a day on genuine institutional news rather than speculation, reflects a market re-rating fundamentals rather than chasing a narrative. The 1-point deduction is composition. Engagement still concentrates around announcement cycles rather than protocol participation, there is no visible public developer ecosystem since Overledger is enterprise software sold to banks, and technicals are stretched enough that some of the current attention will not persist.

🔵 Conclusion

Quant has built something genuinely hard to replicate, and September proved it works. Seven UK banks moved real customer money over tokenised sterling deposits on Quant infrastructure, handling remortgage completions with funds locked and released programmatically while still earning interest.

The Clearing House, owned by 25 of America's largest banks and clearing over $2 trillion daily, named Quant the interoperability layer for its tokenised deposit network. A founder who secured Mastercard's UK payment rails and helped write the ISO interoperability standards is now embedded in the payment infrastructure of two of the world's largest financial systems.

The bull case has stopped being hypothetical. Tokenised commercial bank money is arriving, and in both the UK and the US the institutions building it chose the same orchestration layer.

Quant spent a decade getting into the room. In September it finally showed the work. What it has still never shown anyone is the invoice. https://x.com/0xchainink/status/2103436767559078234