Polkadot Revolutionizes Blockchain Upgrades with Forkless Runtime Updates

Polkadot has revolutionized the way blockchain networks upgrade their protocols. Unlike most blockchains, Polkadot's runtime upgrades don't require a hard fork, which can cause chain splits and coordination risks.

The key to this approach is storing the network's rulebook on-chain as WebAssembly (Wasm) code. This allows developers to update the code without requiring node operators to manually swap software.

A runtime upgrade begins with code preparation, where developers write and test a new version of the code, then compile it into Wasm. The proposal is submitted as an on-chain proposal through Polkadot's referenda system or authorized-origin process.

Once approved, the new Wasm binary replaces the old one in storage, and validators start executing blocks under the new rules at the next block. This approach has allowed Polkadot to roll out protocol improvements quickly and efficiently without breaking continuity.