On the API: Please refer to the API changelog On the app: Select More on Trading page > Select Settings > Select USD-M settlement currency Select More and Settings under Features selection USD-M settlement currency is under Trading mode option on the app's settings menu On the web: Select Settings on Trading page > Select USD-M settlement currency USD-M settlement currency is under Settings option on the web's menuWhat happens if I use a different settlement currency than my counterparty?

The zk-STARK Proof of Reserves (PoR) system leverages STARK theory, a complex mathematical solution. zk-STARK stands for: Zero-Knowledge Scalable Transparent Argument of Knowledge, a cryptographic proof technology based on Vitalik's idea to enforce the integrity and privacy of computations on blockchains. In this article, we'll introduce how it works and explain the general mathematical concept, but if you're interested in diving deeper, start here or here.How does it work?

For Spanish nationals (individuals): Format = 8 digits + 1 letter Example: 12345678A For foreign individuals (NIE): Format = Letter (X/Y/Z or M) + 7 digits + control letter Example: X1234567T or M1234567A Found on ID, driver license, or Resident Permit.