Mysten Labs, the company behind Sui, has presented Tessera as a prototype B2B settlement network for KYC-approved businesses that uses a confidential stablecoin to settle invoices without revealing payment amounts onchain. The system keeps payer, payee and timestamp visible, but encrypts values so only counterparties and other authorized viewers can see them; Seal MPC can grant regulators, tax authorities and dispute arbiters scoped, revocable access without giving them control of funds. Tessera supports one-time transfers, recurring payment channels and disputed-payment arbitration, and expands on Sui's confidential transfers, which entered public testing in June, while Seal uses threshold encryption and Sui's privacy stack relies on Twisted ElGamal and zero-knowledge proofs to validate transfers without exposing balances. Mysten has not named a stablecoin issuer, launch jurisdiction, participants or deployment date, and SUI traded around $0.69 with no clear price reaction as rivals including XRP Ledger and Circle pursue similar institutional privacy tools.