David Schwartz, co-founder of the XRP Ledger and Ripple Chief Technology Officer Emeritus, has proposed a transaction reservation system to mitigate front-running and sandwich attack risks on the XRPL native decentralized exchange and automated market maker.
The mechanism aims to protect regular network participants from sophisticated trading exploits by reshaping transaction processing order before ledger finalization.
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Technical Blueprint Addresses Structural Vulnerabilities
According to analytics platform XRPresso.
io, validators and nodes can inspect pending requests in the pre-validation queue, allowing sophisticated actors to place competing orders ahead of retail users.
Schwartz responded to vulnerability claims by introducing a prioritization scheme, though he downplayed the immediate threat. "I'm not that concerned about this issue," he stated.
The architecture features two primary protocol additions: a ledger object named ReservedTxns and a new transaction type designated as TxnReserve.
Under the specifications, users can reserve an execution slot up to 16 ledgers in advance by supplying a target sequence number and paying at least twice the standard transaction fee.
"I have a proposal for a fairly simple scheme that would eliminate this attack.
It's a transaction reservation scheme that can ensure that a transaction executes before any transaction that was formed after it was disclosed," Schwartz added.
The system limits each future ledger to a maximum of 32 reserved transactions, which execute sequentially ahead of the standard public queue during consensus processing.
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