Icon LinkBasic Example

Let's use launchTestNode with the counter contract from the Fuel dApp tutorial .

Note: you will have to change the import paths of the contract factory and bytecode to match your folder structure.

// #import { launchTestNode };
 
import { CounterFactory } from 'path/to/typegen/output';
 
using launched = await launchTestNode({
  contractsConfigs: [{ factory: CounterFactory }],
});
 
const {
  contracts: [contract],
  provider,
  wallets,
} = launched;
 
const { waitForResult } = await contract.functions.get_count().call();
const response = await waitForResult();

Icon LinkSummary

1. The launched variable was instantiated with the using Icon Link keyword.
2. launchTestNode spun up a short-lived fuel-core node, deployed a contract to it and returned it for testing.
3. The deployed contract is fully typesafe because of launchTestNode's type-level integration with typegen outputs.
4. Besides the contract, you've got the provider and wallets at your disposal.