Polkadot does not support smart contracts initially, but a solution for this problem has been found. And although initially, the zero level of the system was created for inter-chain interaction, smart contracts have found their place

Polkadot offers two types of existing tools for smart contracts:

member networks which are smart contract platforms and are gradually joining Polkadot;
EVM implementation for smart contracts.
Traditional smart contract platforms have the following characteristics:

high development speed;
low deployment costs;
absolute control over resources in on-chain governance;
ease of use.

The Specifics of Parachain Control

Payment


What Are Smart Contracts Based On?


WASM (WebAssembly) support
Rent
Caching
Parachains That Support Smart Contracts
Edgeware

The Moonbeam network
Astar
Acala
Phala
Equilibrium