fetchTrades

Instructions

Implementation Reference

• src/tools/market-tools.ts:167-192 (handler)

  The handler function for the 'fetchTrades' tool. It retrieves a public CCXT exchange instance, calls fetchTrades with the provided parameters, and returns the trades as JSON or an error message.

  async ({ exchangeId, symbol, since, limit }) => {
    try {
      // 공개 인스턴스 사용
      const exchange = ccxtServer.getPublicExchangeInstance(exchangeId);
      const trades = await exchange.fetchTrades(symbol, since, limit);
  
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(trades, null, 2)
          }
        ]
      };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: `Error fetching trades: ${(error as Error).message}`
          }
        ],
        isError: true
      };
    }
  }

• src/tools/market-tools.ts:161-166 (schema)

  Input schema for the 'fetchTrades' tool using Zod, defining parameters: exchangeId (required), symbol (required), since (optional number), limit (optional number).

  {
    exchangeId: z.string().describe("Exchange ID (e.g., 'binance', 'coinbase')"),
    symbol: z.string().describe("Trading symbol (e.g., 'BTC/USDT')"),
    since: z.number().optional().describe("Timestamp in ms to fetch trades since (optional)"),
    limit: z.number().optional().describe("Limit the number of trades returned (optional)")
  },

• src/tools/market-tools.ts:158-193 (registration)

  Registration of the 'fetchTrades' tool on the MCP server, including name, description, input schema, and inline handler function.

  server.tool(
    "fetchTrades",
    "Fetch recent trades for a symbol on an exchange",
    {
      exchangeId: z.string().describe("Exchange ID (e.g., 'binance', 'coinbase')"),
      symbol: z.string().describe("Trading symbol (e.g., 'BTC/USDT')"),
      since: z.number().optional().describe("Timestamp in ms to fetch trades since (optional)"),
      limit: z.number().optional().describe("Limit the number of trades returned (optional)")
    },
    async ({ exchangeId, symbol, since, limit }) => {
      try {
        // 공개 인스턴스 사용
        const exchange = ccxtServer.getPublicExchangeInstance(exchangeId);
        const trades = await exchange.fetchTrades(symbol, since, limit);
  
        return {
          content: [
            {
              type: "text",
              text: JSON.stringify(trades, null, 2)
            }
          ]
        };
      } catch (error) {
        return {
          content: [
            {
              type: "text",
              text: `Error fetching trades: ${(error as Error).message}`
            }
          ],
          isError: true
        };
      }
    }
  );

• src/server.ts:372-372 (registration)

  Call to registerMarketTools which includes the registration of fetchTrades among other market tools.

  registerMarketTools(this.server, this);

• src/server.ts:321-356 (helper)

  Helper method used by fetchTrades to obtain a public (unauthenticated) CCXT exchange instance for the specified exchange.

  getPublicExchangeInstance(
    exchangeId: string,
    marketType: "spot" | "futures" = "spot",
  ): Exchange {
    const instanceKey = `${exchangeId}-${marketType}`;
  
    if (!this.publicExchangeInstances[instanceKey]) {
      if (!ccxt.exchanges.includes(exchangeId)) {
        console.error(
          `Exchange ID '${exchangeId}' not found in ccxt.exchanges for public instance.`,
        );
        throw new Error(`Unsupported exchange for public data: ${exchangeId}`);
      }
  
      const exchangeOptions = {
        options: {
          defaultType: marketType,
        },
      };
  
      try {
        // @ts-ignore - CCXT dynamic instantiation without credentials
        this.publicExchangeInstances[instanceKey] = new ccxt[exchangeId](
          exchangeOptions,
        );
      } catch (error) {
        console.error(
          `Failed to create public CCXT instance for ${exchangeId} (${marketType}):`,
          error,
        );
        throw error; // Re-throw the error after logging
      }
    }
  
    return this.publicExchangeInstances[instanceKey];
  }