Blockchain MCP Server

Instructions

Implementation Reference

• src/cast-commands/utils.ts:50-55 (handler)

  The async handler function for the 'keccak256' tool. It takes a 'data' input string, computes its Keccak-256 hash using ethers.keccak256(ethers.toUtf8Bytes(data)), and returns a text response with the hash.

  async ({ data }) => {
    const hash = ethers.keccak256(ethers.toUtf8Bytes(data));
    return {
      content: [{ type: "text", text: `keccak256 hash: ${hash}` }]
    };
  }

• src/cast-commands/utils.ts:43-49 (schema)

  The schema definition for the 'keccak256' tool, including title, description, and Zod inputSchema requiring a 'data' string.

  {
    title: "keccak256",
    description: "calculate keccak256 hash",
    inputSchema: {
      data: z.string().describe("data to hash"),
    }
  },

• src/cast-commands/utils.ts:40-56 (registration)

  The registration of the 'keccak256' tool via server.registerTool call within UtilsService.registerWithServer method.

  // tool to calculate keccak256 hash
  server.registerTool(
    "keccak256",
    {
      title: "keccak256",
      description: "calculate keccak256 hash",
      inputSchema: {
        data: z.string().describe("data to hash"),
      }
    },
    async ({ data }) => {
      const hash = ethers.keccak256(ethers.toUtf8Bytes(data));
      return {
        content: [{ type: "text", text: `keccak256 hash: ${hash}` }]
      };
    }
  );