A representation of a payment amount.
Attributes
| [R] | alg | alg. |
| [R] | created_at | created_at. |
| [R] | crv | crv. |
| [R] | expired_at | expired_at. |
| [R] | kid | kid. |
| [R] | kty | kty. |
| [R] | use | use. |
| [R] | x | x. |
| [R] | y | y. |