First of all, messages in TVM (TON Network) don't allow us to access the state data of other contracts in the same way we do in Solidity (EVM). This is because the data for a contract can change dynamically in an asynchronous chain. The only way to access data from a smart contract is through message calls, which means asking the contract to send the data through itself. More information here: - https://blog.ton.org/how-to-shard-your-ton-smart-contract-and-why-studying-the-anatomy-of-tons-jettons

First of all, messages in TVM (TON Network) don't allow us to access the state data of other contracts in the same way we do in Solidity (EVM). This is because the data for a contract can change dynamically in an asynchronous chain. The only way to access data from a smart contract is through message calls, which means asking the contract to send the data through itself." More infor here: - https://blog.ton.org/how-to-shard-your-ton-smart-contract-and-why-studying-the-anatomy-of-tons-jettons