# XRP Ledger Proposal Makes Flash Loan Attacks ‘Structurally Impossible’ — AMM Upgrade Details
The XRP Ledger is taking a radically different approach to DeFi security. A new draft amendment called AMM Swappable Curves, filed on May 26 by developers Denis Angell and Roman Thpt, expands the ledger’s automated market maker capabilities while reinforcing a design philosophy that makes flash loan attacks impossible by design.
While Ethereum-based DeFi protocols have lost hundreds of millions to flash loan exploits, the XRPL amendment’s Security Considerations section contains a single devastating line: flash loan attacks are “structurally impossible” on the XRP Ledger.
## Why Flash Loans Can’t Exist on XRPL
Flash loans work on Ethereum because the Ethereum Virtual Machine allows composable smart contracts to chain multiple actions within a single atomic transaction. An attacker can borrow millions, manipulate a price oracle, drain a liquidity pool, and repay the loan — all in one block. The attack has cost DeFi protocols an estimated $1.5 billion since 2020.
XRPL was built differently. Its transactions are atomic in a fundamentally different sense: each transaction is a single, self-contained operation with no support for composable intra-transaction calls. You cannot string together a sequence of complex DeFi interactions within a single XRPL transaction the way you can on Ethereum.
This architectural choice, long considered a limitation by developers wanting to build complex applications on XRPL, is now proving to be a significant security advantage. The attack vector that has become the single largest source of DeFi losses simply cannot exist on the ledger.
## What the AMM Swappable Curves Amendment Does
The proposed amendment doesn’t just reinforce XRPL’s security — it also adds meaningful functionality. Specifically, it introduces:
– **Concentrated liquidity:** Liquidity providers can concentrate capital within specific price ranges, similar to Uniswap V3 on Ethereum, improving capital efficiency
– **StableSwap-style pools:** Optimized for correlated assets like stablecoins, with reduced slippage for pairs trading near peg
– **Enhanced AMM curves:** More flexible pricing curve options for liquidity providers
These features represent a significant upgrade to XRPL’s native AMM, which was introduced in a previous amendment. The upgrade positions XRPL as a more competitive DeFi platform while maintaining its unique security guarantees.
## Broader DeFi Buildout on XRPL
The AMM Swappable Curves amendment is just one piece of a larger DeFi infrastructure push on the XRP Ledger. Two other major proposals are progressing through the development pipeline:
**XLS-66 Lending Protocol:** A comprehensive lending framework enabling both fixed-term and uncollateralized lending. This would bring credit markets to XRPL in a way that leverages its unique atomic settlement properties.
**XLS-65 Single Asset Vaults:** A vault system allowing users to deposit single assets into managed strategies, similar to Yearn Finance on Ethereum but built on XRPL’s fundamentally different architecture.
Together, these proposals signal that XRPL is building a full-featured DeFi stack — not by copying Ethereum, but by designing for the unique capabilities the ledger already possesses.
## What This Means for XRP and DeFi
The development is positive for XRP in several ways. First, it gives XRPL a unique selling proposition in the crowded DeFi space: a blockchain that enables sophisticated financial applications while eliminating the single largest category of DeFi exploits.
Second, as institutional capital increasingly flows into DeFi, security guarantees matter more than raw composability. An XRPL that can offer real DeFi functionality without flash loan risk could attract liquidity that has been hesitant to enter Ethereum-based protocols.
XRP is currently trading at $1.33, up 0.5% on the day, as broader market sentiment recovers.
## FAQ
**When will the AMM Swappable Curves amendment go live?**
The amendment is in draft stage and must undergo community review, validator voting, and achieve consensus before activation. This process typically takes several months.
**Does this mean XRPL is safer than Ethereum for DeFi?**
For flash loan attacks specifically, yes — they are literally impossible on XRPL. However, XRPL has its own security considerations, and no blockchain is immune to all attack vectors.
**Can existing Ethereum DeFi protocols migrate to XRPL?**
Not directly. The programming models are fundamentally different. However, developers can build equivalent functionality designed for XRPL’s architecture.
## Sources
– [CoinDesk: XRPL blocks flash loan attacks](https://www.coindesk.com/tech/2026/05/29/xrp-ledger-s-new-proposal-blocks-the-flash-loan-attacks-costing-defi-hundreds-of-millions)
– [CryptoBriefing: XRPL AMM amendment analysis](https://cryptobriefing.com/xrpl-blocks-flash-loan-attacks-defi/)
– [Whalesbook: XRP Ledger DeFi security](https://www.whalesbook.com/news/English/technology/XRP-Ledger-Targets-DeFi-Security-with-New-AMM-Amendment/)
