Calling other smart functions

Smart functions can call other smart functions with the SmartFunction.call() method, which returns a promise that resolves to a Jstz Response object. Here is an example of calling another smart function:

const targetFunction: Address = "KT1L8ZzGDzaXZSTmzHkoF2azQRf7dCAfxtqx";

const response = await SmartFunction.call(
  new Request(`jstz://${targetFunction}`, {
    method: "POST",
    body: JSON.stringify({ message: "hello" }),
  }),
);
console.log(await response.json());

The URL for the Request object must be jstz:// followed by the address of a Jstz smart function. You can set the method in the Request object but you cannot set the Referer header because it automatically becomes the address of the smart function.

note

Smart functions cannot call external APIs or Tezos smart contracts directly. To call external APIs, they can use the oracle, as described in Calling external APIs.

tip

To transfer tez with the call, use the X-JSTZ-TRANSFER header as described in Managing tokens.

Failed calls to smart functions cause Jstz to immediately revert the current transaction. See Handling errors.