Trait StateExt

pub trait StateExt {
    // Required methods
    fn state_write(
        self: &&mut Self,
        method_context: &MethodContext,
        contract: &Address,
        contract_state: &Address,
        new_state: &VariableBytes<MAX_STATE_SIZE>,
    ) -> Result<(), ContractError>;
    fn state_read(
        &self,
        contract: &Address,
        contract_state: &Address,
        state: &mut VariableBytes<MAX_STATE_SIZE>,
    ) -> Result<(), ContractError>;
    fn state_is_empty(
        &self,
        contract: &Address,
        contract_state: &Address,
    ) -> Result<bool, ContractError>;
}

Extension trait that provides helper methods for calling State’s methods on Env for convenience purposes

Required Methods

fn state_write( self: &&mut Self, method_context: &MethodContext, contract: &Address, contract_state: &Address, new_state: &VariableBytes<MAX_STATE_SIZE>, ) -> Result<(), ContractError>

fn state_read( &self, contract: &Address, contract_state: &Address, state: &mut VariableBytes<MAX_STATE_SIZE>, ) -> Result<(), ContractError>

fn state_is_empty( &self, contract: &Address, contract_state: &Address, ) -> Result<bool, ContractError>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl StateExt for Env

fn state_write( self: &&mut Self, method_context: &MethodContext, contract: &Address, contract_state: &Address, new_state: &VariableBytes<MAX_STATE_SIZE>, ) -> Result<(), ContractError>

fn state_read( &self, contract: &Address, contract_state: &Address, state: &mut VariableBytes<MAX_STATE_SIZE>, ) -> Result<(), ContractError>

fn state_is_empty( &self, contract: &Address, contract_state: &Address, ) -> Result<bool, ContractError>

Implementors