Nano Currency MCP Server

Instructions

Implementation Reference

• nano-currency.js:313-340 (handler)

  The handler function that fetches block information via RPC call to 'block_info', processes the amount and balance with friendlyAmount, and returns a formatted text response. Handles errors appropriately.

  async function (parameters) {  
    try {
  
      let blockInfoJson = (
        await rpcCall(
          NANO_RPC_URL_KEY,
          'block_info',
          {
            json_block: 'true',
            hash: parameters.hash
          }
        )
      )        
  
      return createTextResponse(
        `The block information for hash ${parameters.hash} is ` +
        JSON.stringify({
          ...blockInfoJson,
          amount: blockInfoJson.amount ? friendlyAmount(blockInfoJson.amount) : 'N/A',
          balance: blockInfoJson.balance ? friendlyAmount(blockInfoJson.balance) : 'N/A'
        })
      )
    }
    catch (error) {
      console.error('[block_info] Error:', error.message || error);
      return createErrorResponse(error)
    }    
  }

• nano-currency.js:303-307 (schema)

  Zod schema for the block_info tool parameters, validating the required 'hash' string parameter.

  const block_info_parameters = {
    hash: z.string({ required_error: 'Block hash is required' })
      .refine(hash_ => N.checkHash(hash_), { message: 'Block hash is not valid' })
      .describe("Hash for the Nano block to get information about")
  }

• nano-currency.js:309-312 (registration)

  Registers the 'block_info' tool on the MCP server with its name, description, schema, and references the inline handler function.

  server.tool(
    'block_info',
    'Retrieve detailed information about a specific Nano block.',
    block_info_parameters,