The following payment-related claims are defined for pay and kya-pay tokens.

Claim	Description
`spr`	OPTIONAL - JSON string representing seller service price in currency units.
`sps`	OPTIONAL - Seller pricing scheme, which represents a way for the seller list how it charges for its service or content. One of pay_per_use, subscription, pay_per_mb, or custom. Additional values may be defined and used.
`amt`	JSON string representing token amount in currency units.
`cur`	Currency unit, represented as an ISO 4217 three letter code, such as "EUR".
`val`	JSON string representing token amount in settlement network's units.
`mnr`	OPTIONAL - JSON number representing maximum number of requests when `sps` is `pay_per_use`.
`stp`	Settlement type (one of `coin` or `card`). Additional values may be defined and used.
`sti`	Meta information for payment settlement, depending on settlement type.

Agent Identity (`sti`) Sub-Claims

The Agent Identity (sti) claim is optional. If present, it contains the following sub-claims.

Claim	Description
`type`	Dependent on `stp`. For `coin` - `usdc`. For `card` - `visa_vic` or `mastercard_scof`. Additional values may be defined and used.
`paymentToken`	OPTIONAL - String containing Virtual Payment Card Number in ISO/IEC 7812 format. 12-19 characters.
`tokenExpirationMonth`	OPTIONAL - String containing two-digit Expiration Month Number.
`tokenExpirationYear`	OPTIONAL - String containing four-digit Expiration Year.
`tokenSecurityCode`	OPTIONAL - String containing 3 or 4 digit CVV code.

Additional sub-claims MAY be defined and used. The recipient MUST ignore any unrecognized sub-claims.

Agent Identity (sti) Sub-Claims