mcp-server-ddd-sample/build/application/services/BitcoinService.js

A sample of MCP implementation using DDD structure with some APIs call.

export class BitcoinService {
    apiService;
    constructor(apiService) {
        this.apiService = apiService;
    }
    async getPrices() {
        const pricesPossible = ["USD", "EUR", "GBP", "CAD", "CHF", "AUD", "JPY"];
        const pricesData = await this.apiService.getPrices();
        if (!pricesData) {
            return "Failed to retrieve prices data";
        }
        let msg = "";
        pricesPossible.forEach((element) => {
            if (!pricesData[element]) {
                msg += `Price in ${element} is not available.\n`;
            }
            else {
                msg += `price in ${element}: ${pricesData?.[element] || "N/A"}\n`;
            }
        });
        msg += `Time: ${pricesData.time
            ? new Date(pricesData.time * 1000).toLocaleString()
            : "N/A"}`;
        return msg.trim();
    }
    async getDifficultyAdjustment() {
        const difficultyData = await this.apiService.getDifficultyAdjustment();
        if (!difficultyData) {
            return "Failed to retrieve difficulty data";
        }
        let msg = "Bitcoin Difficulty Adjustment:\n";
        for (const [key, value] of Object.entries(difficultyData)) {
            msg += `${key}: ${value ?? "N/A"}\n`;
        }
        return msg.trim();
    }
}