Enrollment example using TPP client library

EnrollCert.java

package com.example;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class EnrollCert {
	private String cert;
}

EnrollmentService.java

package com.example;

import dk.bec.tpsi.openbanking.tppclient.model.TppClientCertParams;
import dk.bec.tpsi.openbanking.tppclient.model.TppClientRequest;
import dk.bec.tpsi.openbanking.tppclient.model.TppClientResponse;
import dk.bec.tpsi.openbanking.tppclient.service.TppClientException;
import dk.bec.tpsi.openbanking.tppclient.service.TppClientService;
import dk.bec.tpsi.openbanking.tppclient.service.TppClientServiceImpl;
import org.codehaus.jackson.map.ObjectMapper;
import org.springframework.http.HttpStatus;

import java.io.IOException;
import java.util.*;

public class EnrollmentService {
    public final String REQUEST_URL =  "https://some.gateway.url/eidas/1.0/v1/";

    public void enrollment() throws IOException, TppClientException {
        String reqId = UUID.randomUUID().toString();
        TppClientService tppClientService = new TppClientServiceImpl(REQUEST_URL, getTppClientCertParams());
        String jsonBody = getJsonBody(getEnrollRequestBody());
        TppClientRequest request = getTppClientRequest(getHeaders(reqId), jsonBody);

        TppClientResponse response = tppClientService.callGateway(request);

        if (HttpStatus.CREATED.value() != response.getStatus()) {
            // handle HTTP error
        } else {
            //handle response.getBody();
        }
    }

    private TppClientCertParams getTppClientCertParams() {
        return TppClientCertParams.builder().keystorePath("keystore_path")
                .sealCertName("seal_certificate.p12")
                //the alias is optional, if not specified the first key is used
                .sealKeyAlias("seal_certificate_alias")
                .sealCertPass("seal_cert_pass")
                .wacCertName("wac_certificate.p12")
                .wacCertPass("wac_certificate_pass")
                //the alias is optional, if not specified the first certificate is used
                .wacKeyAlias("wac_certificate_alias")
                .build();
    }

    private EnrollRequestBody getEnrollRequestBody() {
        return EnrollRequestBody.builder()
                .tppid("DK-FSA001-63882")
                .commercialname("Amazing FinTech")
                .roles(new String[] {"PSP_AI"})
                .qsealcert(getEnrollQSealCert())
                .qwaccert(getEnrollQWacCert())
                .build();
    }

    private EnrollQSealCert getEnrollQSealCert() {
        return EnrollQSealCert.builder()
                .certificate("Base64 encoded QSEAL certificate string")
                .cacert("Base64 encoded CA certificate string")
                .chaincerts(new EnrollCert[] { new EnrollCert("Base64 encoded CHAIN certificate string") })
                .build();
    }

    private EnrollQWacCert getEnrollQWacCert() {
        return EnrollQWacCert.builder()
                .certificate("Base64 encoded QWAC certificate string without newlines and -----BEGIN CERTIFICATE----- and -----END CERTIFICATE-----. This applies for all certificates.")
                .cacert("Base64 encoded CA certificate string")
                .chaincerts(new EnrollCert[] { new EnrollCert("Base64 encoded CHAIN certificate string") })
                .build();
    }

    private TppClientRequest getTppClientRequest(Map<String, List<String>> headers, String jsonBody) {
        return TppClientRequest
                .builder()
                .httpMethod("POST")
                .path("enrollment")
                .headers(headers)
                .requestBody(jsonBody)
                .build();
    }

    private Map<String, List<String>> getHeaders(String reqId) {
        Map<String, List<String>> headers = new HashMap<>();
        headers.put("x-request-id", Arrays.asList(reqId));
        return headers;
    }

    private String getJsonBody(EnrollRequestBody body) throws IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        return objectMapper.writeValueAsString(body);
    }
}

EnrollQSealCert.java

package com.example;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class EnrollQSealCert {
	private String certificate;
	private String cacert;
	private EnrollCert[] chaincerts;
}

EnrollQWacCert.java

package com.example;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class EnrollQWacCert {
	private String certificate;
	private String cacert;
	private EnrollCert[] chaincerts;
}

EnrollRequestBody.java

package com.example;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class EnrollRequestBody {
	private String tppid;
	private String commercialname;
	private String[] roles;
	private EnrollQWacCert qwaccert;
	private EnrollQSealCert qsealcert;
}