📚
Open Polkadot Bootcamp
  • 📚 About the Bootcamp
    • 📖 Additional Resources
    • 👐 Ask For Support
  • 📖 Curriculum
  • 📕Rust Programming Language
    • Basic Rust
      • Introduction to Rust
        • 🧑‍💻 Excercises
      • Common Programming Concepts
        • 🧑‍💻 Excercises
      • Program Life Cycle
        • 🧑‍💻 Excercises
      • Ownership & Borrow Checker
      • Common Data Structures
    • Advanced Rust
      • Generic types, Trait extension and Advanced types
      • Lifetime Notation
      • Smart pointers & Macros
      • Common design patterns in Rust
      • Package management & How to structure your Rust project
      • Overview of the Rust ecosystem
  • 📘Building a blockchain with Polkadot SDK
    • Polkadot
      • Additional Reads
        • Why do you want to build a blockchain on Polkadot?
        • Understanding the sharded network design of Polkadot
      • Development on Polkadot
    • Polkadot SDK
      • Substrate
        • Create a new blockchain
          • 🧑‍💻 Exercise: Clone the minimal template
          • Understanding the architecture
          • Break down the node architecture
          • Introducing to Pop CLI tool
        • Adding a custom logic to runtime
          • 🧑‍💻 Exercise: Rust State Machine
          • Components of a Pallet
          • Hooks
          • Weights & Benchmarking
          • Extensions
            • Signed Extensions
            • Transaction Extensions
        • Common runtime modules
          • 📕Example: System Pallet
          • 📕Example: Contracts Pallet
          • 📕Example: Assets Pallet
          • 📕Example: Utility Pallet
        • Runtime API and RPC
        • Runtime upgrade
        • Bump Polkadot SDK versions
      • Cumulus
        • Introduction to Cumulus
          • Parachain from scratch
          • 🧑‍💻 Exercise: Build a parachain from scratch
        • Running a local relaychain network
          • Register & reserve a parachain
          • Launch the network & run a collator node
          • Launch the network with Pop CLI
        • Agile Coretime
    • Polkadot Hub
  • 📒Smart Contract Development
    • Introduction
      • Introduction to PolkaVM
      • Getting started with Solidity development
      • Solidity File Structure
      • Contract Structure
    • Basic Solidity
      • Value types
      • Reference Types
      • Mapping Types
      • Simple Storage
    • Advanced Solidity
      • Units
      • Global Variables
      • Expression and Control Structures
      • Advanced Storage
      • Contract Tests
      • Contracts
Powered by GitBook
On this page
  1. Building a blockchain with Polkadot SDK
  2. Polkadot SDK
  3. Substrate

Runtime API and RPC

PreviousCommon runtime modulesNextRuntime upgrade

Last updated 4 months ago

Substrate nodes consist of outer node services and a runtime and this separation of responsibilities is an important concept for designing Substrate-based chains and building upgradeable logic. However, the outer node services and the runtime must communicate with each other to complete many critical operations, including reading and writing data and performing state transitions. The outer node services communicate with the runtime by calling runtime application programming interfaces (Runtime API) to perform specific tasks.

📘
How Runtime and Outer Node Services communicate mutually?