LogoLogo
WebsiteDiscordTelegramTwitter
  • 🏠Witnet Oracle Docs
  • Introduction
    • ❓What is Witnet?
      • ⚙️Oracle Architecture
      • 🪙The Witnet Coin (Wit)
      • 👛Wallets
      • 🤔Frequently Asked Questions
      • 😎Awesome Witnet
    • 🚀Quick Tutorials
      • 📈Price Feeds
      • 🎲Randomness
      • 🌐APIs and HTTP GET/POST
      • ⛏️Mining Wit
  • Smart contracts developers
    • ⛓️Supported chains
    • 🔮Wit/Oracle
      • HTTP GET Requests in Solidity
      • HTTP POST Requests in Solidity
      • Query GraphQL APIs in Solidity
      • Dynamic Requests in Solidity
      • UsingWitnet Inheritance
      • API Reference
        • Solidity API
          • Solidity Contracts
            • WitnetRequestBoard
        • Javascript API
        • RADON API
          • RADON Type System
          • RADON Errors
      • Multi-chain Addresses
    • 💹Wit/Price Feeds
      • How To Use Witnet Price Feeds
      • Update Conditions
      • Code Examples
      • API Reference
      • Multi-chain Addresses
        • Arbitrum Price Feeds
        • Avalanche Price Feeds
        • Base Price Feeds
        • Boba Price Feeds
        • Celo Price Feeds
        • Conflux Price Feeds
        • Cronos Price Feeds
        • Dogechain Price Feeds
        • Elastos Price Feeds
        • Ethereum Price Feeds
        • Gnosis Chain Price Feeds
        • Kaia Price Feeds
        • Kava Price Feeds
        • KCC Price Feeds
        • Mantle Price Feeds
        • Meter Price Feeds
        • Metis Price Feeds
        • Moonbeam Price Feeds
        • OKX Price Feeds
        • Optimism Price Feeds
        • Polygon Price Feeds
        • Reef Price Feeds
        • Scroll Price Feeds
        • Syscoin Price Feeds
        • Ultron Price Feeds
        • Request new price feed or chain support
    • 🎲Wit/Randomness
      • Generating Randomness
      • WitnetRandomness Contract
      • Low-level Requests
      • Code Examples
      • API Reference
      • Multi-chain Addresses
    • 🏗️Guides
      • 📖Solidity Contracts
        • Appliances
          • 📃WitnetPriceFeeds
          • 📃WitnetRandomness
        • Core
          • 📃WitnetOracle
          • 📃WitnetRadonRegistry
          • 📃WitnetRequest
          • 📃WitnetRequestFactory
          • 📃WitnetRequestTemplate
        • Mockups
          • 📃UsingWitnet
          • 📃UsingWitnetRandomness
          • 📃UsingWitnetRequest
          • 📃UsingWitnetRequestTemplate
          • 📃WitnetRandomnessRequestConsumer
          • 📃WitnetRequestConsumer
          • 📃WitnetRequestTemplateConsumer
      • 🧙Solidity Wizard
    • 🎓Tutorials
      • Building a Satoshi/Wei custom price feed
  • Witnet Node Operators
    • 🖥️Requirements
    • 🚀Witnet Node Quick Start Guide (Docker)
    • 🔎Next steps
    • 📄CLI Reference
    • 🤓Advanced Setups
      • Run Witnet as a systemd service
      • Run Witnet as a docker compose service
      • Paranoid mode (Witnet over proxies and Tor)
      • Configuration file
  • Witnet Node Developers
    • 🏗️Integration Guide
      • Node API Reference
      • Wallet API Reference
    • 🗜️Compile witnet-rust from Source Code
Powered by GitBook
On this page

Was this helpful?

Edit on GitHub
  1. Smart contracts developers
  2. Guides
  3. Solidity Contracts

Core

Last updated 5 months ago

Was this helpful?

This section includes description of the core contracts and artifacts that enable developers and smart contracts to interact at the lowest possible level with the Witnet oracle blockchain, in order to:

  • Build up Witnet-compliant custom data requests (i.e. ), parameterized data sources and request templates (i.e. ).

  • Perform on-chain introspection of data sources, expected result data types, and off-chain computations of Witnet-complaint data requests and parameterized data sources.

  • Post data queries to be bridged to, solved by and reported from the Witnet blockchain. Get data query results results posted back into the bridge storage (to be eventually read asynchronously), or right into your own consuming smart contracts (synchronously posted into your contract as soon as a result gets eventually reported from the Witnet blockchain).

  • Estimate minimum base fees to be paid when posting data queries, depending on (a) whether the underlying Witnet-compliant data request was previously verified or not, (b) whether the query result is to be posted into the WitnetOracle storage or right into some requesting contract (i.e. callbacks), and (c) the expected EVM transaction gas price expected to pay when querying new data.

🏗️
📖
📃WitnetOracle
📃WitnetRadonRegistry
📃WitnetRequest
📃WitnetRequestFactory
📃WitnetRequestTemplate
WitnetRequest
WitnetRequestTemplate
WitnetOracle