Provisions a new virtual account for the authenticated merchant in the requested deposit currency. EUR creates an IBAN/BIC that settles to EURC on Base, USD creates an ACH account number/routing number that settles to USDC on Base. When X-On-Behalf-Of is set, the virtual account is provisioned for the targeted sub-merchant.

A merchant can hold at most one virtual account per currency. The merchant must already have a custodial wallet and a dedicated provider customer (otherwise the request is rejected).