Pump.fun sent a lawyer's letter to the founder of Eliza Labs, accusing them of reverse engineering 97.6% of the source code

According to a publicly disclosed lawyer's letter, the entity behind Pump.fun, Bracket Company Inc., sent a cease-and-desist letter to Eliza Labs founder Shaw Walters (X account @shawmakesmagic) on October 29, 2026, through the law firm Brown Rudnick. Pump.fun accuses Walters of unauthorized copying, reverse engineering, and planning to publicly release its source code, violating U.S. copyright law and platform service terms.

The lawyer's letter states that Walters posted a series of messages on the X platform between October 27 and 28, claiming to have reverse-engineered 97.6% of the source code of the Pump.fun contract set, with 80% matching the original contract byte for byte, and plans to add the front-end and back-end code to the code repository, offering project tokens $PMUP as a reward to contributors. Pump.fun demands that Walters immediately cease such activities, refrain from publicly releasing the source code, and clearly states that such reverse engineering constitutes illegal behavior.