Substrate Ink! Contract Cross-Contract Calls: Interoperability on the Substrate Blockchain

Substrate Ink! is a programming language used for building smart contracts on the Substrate blockchain framework. It's designed for ease of use and allows developers to write contracts in Rust, a popular systems programming language.

Cross-contract calls, also known as contract-to-contract calls, are a feature of Substrate that lets smart contracts interact with each other. This means one contract can call functions in another contract, enabling more complex and sophisticated applications on the blockchain.

Cross-contract calls are achieved using the Substrate runtime API, which provides functions to interact with other contracts. Developers can use these functions to send messages to other contracts, query data from other contracts, and receive messages from other contracts.

Overall, Substrate Ink! and cross-contract calls are powerful tools for building complex and interoperable smart contracts on the Substrate blockchain.