Cardano (ADA) founder Charles Hoskinson accused Ethereum of copying Cardano’s Extended Unspent Transaction Output (EUTXO) model after an Ethereum research proposal on “one-shot” payment objects. According to BeInCrypto, Ethereum Foundation researcher Toni Wahrstätter published a design this week that would avoid permanent state entries for most simple payments by proving them from history and keeping only a spent marker in state. Wahrstätter said the approach could cut permanent state for payment workloads by roughly 99.8% and builds on the Frame Transactions standard EIP-8141, crediting Vitalik Buterin for raising the topic as he promotes a Lean Ethereum roadmap. Hoskinson said mentioning Cardano is taboo in Ethereum circles.