RGB Lightning Network MCP Server

Instructions

Implementation Reference

• src/server.ts:269-284 (registration)

  Registration of the rgb_sign_message MCP tool, including input schema (message: string) and inline handler that delegates to rgbClient.signMessage() and handles response/error formatting.

  server.tool(
    'rgb_sign_message',
    'Sign a message with the RGB node',
    {
      message: z.string().describe('The message to sign'),
    },
    async ({ message }) => {
      try {
        const result = await rgbClient.signMessage(message);
        return { content: [{ type: 'text', text: JSON.stringify(result, null, 2) }] };
      } catch (error) {
        const errorMessage = error instanceof Error ? error.message : String(error);
        return { content: [{ type: 'text', text: `Error: ${errorMessage}` }], isError: true };
      }
    }
  );

• src/server.ts:275-283 (handler)

  Inline handler function for the rgb_sign_message tool.

  async ({ message }) => {
    try {
      const result = await rgbClient.signMessage(message);
      return { content: [{ type: 'text', text: JSON.stringify(result, null, 2) }] };
    } catch (error) {
      const errorMessage = error instanceof Error ? error.message : String(error);
      return { content: [{ type: 'text', text: `Error: ${errorMessage}` }], isError: true };
    }
  }

• src/server.ts:273-274 (schema)

  Zod input schema for the tool: message as string.

    message: z.string().describe('The message to sign'),
  },

• src/rgb-client.ts:111-113 (helper)

  Helper method in RGBApiClientWrapper that wraps the external SDK's node.signMessage method.

  async signMessage(message: string) {
    return await this.client.node.signMessage({ message });
  }

• src/types.ts:101-104 (schema)

  TypeScript interface for the expected output of signMessage.

  export interface SignMessageResult {
    signature: string;
    [key: string]: any;
  }