spring.application.name=cryptoadvisordemo
 
# OpenAI API parameters
spring.ai.openai.base-url=https://api.openai.com
spring.ai.openai.api-key=${OPENAI_API_KEY}
 
# Application specific properties
application.chat.model=gpt-3.5-turbo
application.chat.temperature=0.1f
application.chat.max-tokens=200

@Configuration
@ConfigurationProperties(prefix = "application.chat")
@Setter
@Getter
public class ChatProperties {
    private String model;
    private Float temperature;
    private Integer maxTokens;
}

@SpringBootApplication
@EnableConfigurationProperties(ChatProperties.class)
public class CryptoadvisordemoApplication {
 
	public static void main(String[] args) {
		SpringApplication.run(CryptoadvisordemoApplication.class, args);
	}
}

@RestController
@RequiredArgsConstructor
public class AdviceController {
    private final AdviceService adviceService;
 
    @GetMapping("/advice/overview/{cryptoSymbol}")
    public ResponseEntity<String> generate(
            @PathVariable CryptoSymbol cryptoSymbol
    ) {
        return ResponseEntity.ok(adviceService.overview(cryptoSymbol));
    }
}

@Getter
@RequiredArgsConstructor
public enum CryptoSymbol {
    BTC("Bitcoin"), ETH("Ethereum"), SOL("Solana");
 
    private final String title;
}

@Service
@RequiredArgsConstructor
public class AdviceService {
 
    private final OpenAiChatModel chatModel;
 
    public String generate(CryptoSymbol cryptoSymbol) {
        UserMessage userMessage = new UserMessage(
                """
                Give me a short overview of the current %s (%s) quotation followed by a brief trend assessment.
                """.formatted(cryptoSymbol.getTitle(), cryptoSymbol.name())
        );
 
        var chatResponse = chatModel.call(
                new Prompt(
                        List.of(userMessage),
                        OpenAiChatOptions.builder()
                                .withModel("gpt-3.5-turbo")
                                .withTemperature(0f)
                                .withFunction("CurrentQuotation")
                                .build()
                )
        );
        return chatResponse.getResult().getOutput().getContent();
    }
}

public class QuotationFunctionMock implements Function<QuotationFunctionMock.Request, Quotation> {
 
    public record Request(String cryptoSymbol) {}
 
    @Override
    public Quotation apply(Request r) {
        return new Quotation(
                r.cryptoSymbol(), "", 25000,26000,1317774231.5192668
        );
    }
}

public record Quotation(
        String symbol,
        String name,
        double priceUSD,
        double priceYesterdayUSD,
        double volumeYesterdayUSD
) {}

@Configuration
public class BeanProvider {
    @Bean
    public FunctionCallback quotationFunction() {
        return FunctionCallbackWrapper.builder(new QuotationFunctionMock())
                .withName("CurrentQuotation")
                .withDescription("""
                Get the current quotation of the cryptocurrency by its symbol.
                Available symbols are: %s
                """.formatted(
                        Stream.of(CryptoSymbol.values()).map(CryptoSymbol::name)
                                .collect(Collectors.joining(", "))
                ))
                .build();
    }
}

The current quotation for Bitcoin (BTC) is $25,000. The price yesterday was $26,000. The trading volume yesterday was $1,317,774,231.52.
 
Based on this information, there seems to be a slight decrease in the price of Bitcoin compared to yesterday. The trend assessment indicates a downward movement in the price.

@RestController
@RequiredArgsConstructor
public class AdviceController {
 	...
    
    @PostMapping("/advice/question")
    public ResponseEntity<String> generate(
      @RequestBody Question question
    ) {
        return ResponseEntity.ok(adviceService.answer(question.text()));
    }
}

@Service
@RequiredArgsConstructor
public class AdviceService {
  
  	private final OpenAiChatModel chatModel;
    private final ChatProperties chatProperties;
	...
      
    public String answer(String text) {
        SystemMessage systemMessage = new SystemMessage("""
                 You are a helpful AI assistant that provides insight into cryptocurrencies based
                 on realtime quotations. Answer the user question based on your knowledge about the
                 market and the available tools for retrieving quotation info as needed. If the user's
                 question has nothing to do with cryptocurrencies or the associated markets,
                 just say you don't know the answer.
                \s""");
        UserMessage userMessage = new UserMessage(text);
 
        return getChatResponse(List.of(systemMessage, userMessage))
                .getResult().getOutput().getContent();
    }
  
  	private ChatResponse getChatResponse(List<Message> messages) {
        return chatModel.call(
                new Prompt(
                        messages,
                        OpenAiChatOptions.builder()
                                .withModel(chatProperties.getModel())
                                .withTemperature(chatProperties.getTemperature())
                                .withMaxTokens(chatProperties.getMaxTokens())
                                .withFunction("CurrentQuotation")
                                .build()
                )
        );
    }
}

@Service
@RequiredArgsConstructor
public class QuotationService {
 
  private final RestTemplate restTemplate;
  private final QuotationProperties props;
 
  public Quotation fetch(CryptoSymbol cryptoSymbol) {
      Map<String, Object> responseMap = restTemplate.getForObject(
              props.getApiUrl() + "/" + cryptoSymbol.name(), Map.class
      );
 
      if (responseMap == null) throw new RuntimeException("Could not fetch quotation");
 
      return new Quotation(
              (String) responseMap.get("Symbol"),
              (String) responseMap.get("Name"),
              (Double) responseMap.get("Price"),
              (Double) responseMap.get("PriceYesterday"),
              (Double) responseMap.get("VolumeYesterdayUSD")
      );
  }
}

@RequiredArgsConstructor
public class QuotationFunction implements Function<QuotationFunction.Request, Quotation> {
 
    private final QuotationService quotationService;
 
    public record Request(String cryptoSymbol) {}
 
    @Override
    public Quotation apply(Request r) {
        return quotationService.fetch(CryptoSymbol.valueOf(r.cryptoSymbol()));
    }
}

@Configuration
public class BeanProvider {
 
    @Bean
    public FunctionCallback quotationFunction(@Autowired QuotationService quotationService) {
        return FunctionCallbackWrapper.builder(new QuotationFunction(quotationService))
                .withName("CurrentQuotation")
                .withDescription("""
                Get the current quotation of the cryptocurrency by its symbol.
                Available symbols are: %s
                """.formatted(
                        Stream.of(CryptoSymbol.values()).map(CryptoSymbol::name)
                                .collect(Collectors.joining(", "))
                ))
                .build();
    }
  
  	@Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        return builder.build();
    }
}

As of the latest data:
 
- Ethereum (ETH) is currently priced at $3,372.99 USD. Yesterday, its price was $3,265.43 USD, and the trading volume was $2,634,234,950.99 USD.
- Solana (SOL) is currently priced at $192.13 USD. Yesterday, its price was $185.88 USD, and the trading volume was $581,814,086.53 USD.
 
Based on the current prices and trading volumes, both Ethereum and Solana show positive movements. Ethereum is a well-established token with a strong market presence, while Solana has been gaining popularity for its fast transactions and scalability. Both tokens have shown promising performance in the market.