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Instruction to use this cross-contract calling smart contract

Contract Trapped During Exucution error while cross-contract calling issue

  1. Build app & app2 smart contract using the following command:

    • cargo contract build --release
  2. Upload .contract file of app1 and after thatn app2 to blockchain network either https://contracts-ui.substrate.io/ or https://polkadotjs-apps.web.app/#/contracts

  3. If you upload app2 smart contract with the following constructor code, then while calling app_flip function from app2 contract cause issue which is listed below:

     #[ink(constructor)]
     pub fn new(init_value: bool, app_ref: AppRef) -> Self {
    
         Self {
             value: init_value,
             app: app_ref,
         }
     }
    

Err

  1. To call app_flip successfully from app2, uncomment the following code in app2 smart contract, then it works as follows:

    #[ink(constructor)]
    pub fn new(init_value: bool, app_code_hash: Hash, version: u32) -> Self {
        let total_balance = Self::env().balance();
        let salt = version.to_le_bytes();
        let app = AppRef::new(init_value)
            .endowment(total_balance / 4)
            .code_hash(app_code_hash)
            .salt_bytes(salt)
            .instantiate();
    
        Self {
            value: init_value,
            app: app.unwrap(),
        }
    }
    

Err

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