Function buildPaymentRequired

buildPaymentRequired(
    planId: string,
    options?: {
        agentId?: string;
        description?: string;
        endpoint?: string;
        environment?: EnvironmentName;
        httpVerb?: string;
        mimeType?: string;
        network?: string;
        scheme?: X402SchemeType;
    },
): X402PaymentRequired
Build an X402PaymentRequired object for verify/settle operations.

This helper simplifies the creation of payment requirement objects that are needed for the facilitator API.
Parameters
- planId: string
  The Nevermined plan identifier (required)
- Optionaloptions: {
      agentId?: string;
      description?: string;
      endpoint?: string;
      environment?: EnvironmentName;
      httpVerb?: string;
      mimeType?: string;
      network?: string;
      scheme?: X402SchemeType;
  }
  Optional configuration with endpoint, agentId, httpVerb, network, description
Returns X402PaymentRequired
X402PaymentRequired object ready to use with verifyPermissions/settlePermissions
Example
```
import { buildPaymentRequired } from '@nevermined-io/payments'

const paymentRequired = buildPaymentRequired('123456789', {
  endpoint: '/api/v1/agents/task',
  agentId: '987654321',
  httpVerb: 'POST'
})

const result = await payments.facilitator.verifyPermissions({
  paymentRequired,
  x402AccessToken: token,
  maxAmount: 2n
})
```
- Defined in src/x402/facilitator-api.ts:227