RestClient în Spring Boot 3 în Spring Boot

package ro.dexblog.demo.client;

import org.springframework.stereotype.Service;
import org.springframework.web.client.RestClient;

public record ExchangeRate(String currency, double rate) {}

@Service
public class CurrencyClientService {

    private final RestClient restClient;

    public CurrencyClientService(RestClient.Builder builder) {
        this.restClient = builder
            .baseUrl("https://api.bnr.ro/v1")
            .defaultHeader("Accept", "application/json")
            .build();
    }

    public ExchangeRate getRate(String currencyCode) {
        return restClient.get()
            .uri("/rates/{code}", currencyCode)
            .retrieve()
            .body(ExchangeRate.class);
    }
}