{"$schema":"https://json-schema.org/draft/2020-12/schema","title":"Payment Account Credential","type":"object","additionalProperties":false,"required":["iban","bic","currency"],"properties":{"iban":{"type":"string","description":"IBAN (basic format validation)"},"bic":{"type":"string","description":"BIC (ISO 9362 format)"},"currency":{"type":"string","description":"ISO 4217 currency code"}}}