Let’s Get Soroban: Authentication.

This educational episode explains authentication mechanisms in Soroban smart contracts, which verify that a specific address has authorized a transaction. The speaker covers two primary authentication approaches: require_auth for simple single-parameter verification and require_auth_for_args for multiple parameters. Authentication is essential for preventing unauthorized access to user assets and preventing impersonation. The tutorial demonstrates practical implementation by building a contract from scratch, showing how to import address utilities from the SDK and implement authentication checks. Testing is covered using mock_auth for single authentication calls and mock_all_auth for multiple authentication scenarios. The speaker emphasizes that authentication is critical for contract security and provides code examples showing how to pass address references and set up proper test environments.