A supposed transaction of nearly $15 billion worth of XRP (XRP) from an unknown wallet to Bitfinex on Jan. 14 never went through and was part of a failed “partial payments exploit” attempt, according to Bitfinex chief technology officer Paolo Ardoino.

The transfer was initially highlighted by blockchain tracking X account Whale Alert, which claimed seeing a transaction of 25.6 billion XRP — nearly half of XRP’s billion circulating supply — from an unknown wallet to Bitfinex.

However, Whale Alert later deleted the post and said there was “an issue with properly reading the Ripple node response, resulting in a few wrong posts.”

Ardoino then explained on X that “someone attempted to attack” Bitfinex through a “Partial Payments Exploit” with the would-be attacker anticipating the exchange had incorrectly configured its software to process partial payments.

Someone attempted to attack @bitfinex via “Partial Payments Exploit”.
Attack failed since Bitfinex properly handles ‘delivered_amount’ data field.https://t.co/EiGw9UQmmq

(updated with better gif) https://t.co/8I7vlO05ou pic.twitter.com/DxOnJLLkhU

— Paolo Ardoino 🍐 (@paoloardoino) January 14, 2024

A partial payments exploit works by assuming a company has an improperly configured system that only reads the “amount” field of an XRP transaction — which is set to a high amount.

In reality, the exploiter sends over an amount much smaller as specified in another transaction field, and aims to receive credit for the difference from the company.

Ardoino, however, noted the attack failed as “Bitfinex properly handles the ‘delivered_amount’ data field.

According to blockchain data, the attacker also tried an attack on Binance with a 58.9 billion XRP transfer, which similarly failed.