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Limit Access

You can define function access controls through the optional access subsection in the schema definition file. By default, functions are accessible to everyone. However, when specified, the access identifier restricts who can call a function.

Access Identifiers​

You can set access identifiers with one of the following options:

  • self: Restricts access to the smart contract itself.
  • chain: Allows only the chain owner to invoke the function.
  • Other: Specify an AgentID or AgentID[] variable in state storage, controlling the agent(s) permitted to call the function. You should provide a mechanism to initialize and manage this variable.

The Schema Tool handles the auto-generation of the code for access verification.

Usage Examples​

You can find examples in the schema definition file where the owner state variable operates as an access identifier. Functions such as init initialize the state variable, while setOwner can modify ownership, enhancing the security by limiting function access to the current owner.

Remember to tailor access identifiers to individual functions as required, and establish multiple identifiers if necessary.