According to an official announcement, Polkadot has launched a new messaging system (XCM) which allows communication across multiple parachains in addition to enabling cross-chain transfer of assets like NFTs. In essence, this means that the Polkadot ecosystem is now fully interoperable.
Besides offering interoperability, XCM has also been developed to support communication between smart contracts and Substrate runtime modules, the modular blockchain software development kit underpinning the Polkadot network.
“I see traditional smart contracts on isolated Layer 1 chains like setting up shop in a kingdom surrounded by walls. Then we have bridges which are like a trading route that first connected nations from nations. Now we have XCM, which is like a free trade agreement for blockchains. This is the natural future,” Astar Chief Technical Officer Hoon Kim, commented on XCM’s release.
Polkadot is also working on future system iterations known as XCMP or “Cross-Chain Message Passing,” which will allow direct parachain-to-parachain communication without any intermediation by the Relay Chain.
This will overall make the process more scalable and eliminate the requirement for a governance process for individual chains.
XCMP will also allow messages to be sent to blockchains that can decode messages and scale which includes platforms such as Ethereum and Bitcoin.