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LinkWell Nodes FAQ

The following is a list of frequently-asked questions and answers related to LinkWell Nodes's diverse service offering.

On this page:

General Services​

What services does LinkWell Nodes offer?​

LinkWell Nodes provides a comprehensive suite of Web3 services, including:

  • Chainlink oracle services and data feeds
  • Direct Request Jobs for on-demand data retrieval
  • Verifiable Random Number (VRN) services
  • Smart contract development and integration
  • External adapter development and hosting
  • Infrastructure design and monitoring
  • Premium support services
  • Advisory services for Web3 projects
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LinkWell Nodes offers professional Chainlink oracle services on all major EVM-based mainnet and testnet blockchains. To view a directory of our oracle addresses and job IDs, please feel free to view our Chainlink data feeds documentation.

How can I get started with LinkWell Nodes' services?​

You can get started by:

  1. Visiting our mainnet or testnet data feed documentation pages
  2. Filling out our data feed request form for custom requirements
  3. Joining our Discord server
  4. Booking a consultation through our Calendly

Blockchain Support​

Which blockchains do you support?​

We support a wide range of blockchain networks:

Mainnet Networks​

Testnet Networks​

For specific chain support and pricing, please visit our mainnet or testnet documentation pages.

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All our testnet data feeds are completely free (0 LINK fee).

What types of data can your oracles retrieve?​

Our oracles can retrieve and process various types of data:

Basic Blockchain Data Types​

  • uint256: Single unsigned integer values
  • uint256[]: Arrays of unsigned integers
  • int256: Single signed integer values
  • int256[]: Arrays of signed integers
  • bool: Boolean values (true/false)
  • bool[]: Arrays of boolean values
  • string / bytes: Text data
  • string[] / bytes[]: Arrays of text data

Financial Data​

  • Cryptocurrency prices and market data
  • Traditional market data (stocks, forex, commodities)
  • DeFi protocol metrics
  • Financial indices and indicators

Real-World Data​

  • Weather data
  • Sports scores and statistics
  • Geospatial data
  • IoT sensor data
  • Social media metrics

Custom Data​

  • API integrations
  • Web scraping
  • Database queries
  • Custom computations
  • Cross-chain data
  • Verifiable Random Numbers (VRN)
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LinkWell Nodes offers professional Chainlink oracle services on all major EVM-based mainnet and testnet blockchains. To view a directory of our oracle addresses and job IDs, please feel free to view our Chainlink data feeds documentation.

How do you ensure data accuracy?​

We maintain data accuracy through:

  • Multiple data source verification
  • Real-time data validation
  • Automated error detection
  • Fallback mechanisms
  • Regular data source audits
  • Custom data aggregation methods
  • JSON path filtering for precise data extraction
  • Gas limit monitoring to prevent failed transactions

Can you handle custom data requirements?​

Yes, we can:

  • Develop custom external adapters for specific data needs
  • Integrate with private APIs and data sources
  • Create custom data processing pipelines
  • Implement specific data validation rules
  • Set up custom data update frequencies
  • Handle complex data transformations
  • Store sensitive information (like API keys) off-chain on our secure infrastructure
  • Provide custom job IDs tailored to your specific requirements within 24 hours

Price Feed Jobs​

What are Price Feed Jobs?​

Price Feed Jobs are automated data delivery services that:

  • Update your contract's data automatically without manual triggering
  • Run at configurable time intervals (e.g., every 1 hour)
  • Can trigger on value deviation thresholds (e.g., 1% price change)
  • Support various data types and sources
  • Require no gas fees from your contract for updates
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Looking for a custom price feed?​

We can update any of your contract's data at a set frequency, and/or deviation-based trigger condition. Fill out our request survey to get this set up - we'll typically deliver your new feed to you in 24 hours or less!

What types of data can Price Feeds deliver?​

Our Price Feeds can deliver any type of data that can be regularly monitored:

  • Cryptocurrency prices and trading volumes
  • Traditional market data (stocks, commodities, forex)
  • Sports scores and statistics
  • Weather data and forecasts
  • Custom API data feeds
  • Cross-chain data
  • DeFi protocol metrics

How quickly can you set up a custom Price Feed?​

We can typically deliver new Price Feeds within 24 hours, which includes:

  • Custom external adapter development
  • Feed deployment and testing
  • Integration support
  • Monitoring setup

To get started, simply fill out our price feed request form.

How reliable are your Price Feeds?​

Our Price Feeds are built for maximum reliability:

  • Triple+ redundant infrastructure
  • Automated failover systems
  • Real-time monitoring
  • Multiple data source verification
  • Deviation checks for data accuracy
  • 24/7 operational monitoring
  • Automated alerting systems

What are the costs for Price Feeds?​

Price Feed costs depend on several factors:

  • Update frequency requirements
  • Data source complexity
  • Infrastructure requirements
  • Monitoring needs
  • Support level required

For detailed pricing information, please visit our pricing page or fill out our price feed request form for a custom quote.

Direct Request Jobs​

What are Direct Request Jobs?​

Direct Request Jobs are on-demand oracle services that:

  • Initiate HTTP requests (GET, POST, PUT, DELETE) to any internet endpoint
  • Parse JSON responses using JSON Path filtering
  • Return the processed data to your smart contract
  • Support various data types (uint256, int256, bool, string, etc.)
  • Allow for custom data processing and transformation

How do I implement a Direct Request Job in my smart contract?​

To implement a Direct Request Job:

  1. Add the constructor with the oracle address and job ID
  2. Create a request function with the required parameters (method, URL, headers, body, path, contact)
  3. Implement a callback function to receive and process the response
  4. Fund your contract with sufficient LINK tokens for payment

For detailed implementation examples, please visit our mainnet or testnet documentation pages.

What are the gas limits for Direct Request Jobs?​

Our Direct Request Jobs have a configured gas limit of 1,000,000 for writing results on-chain. If your transaction isn't returning any value after more than 60 seconds of waiting, you may need to:

  • Return a smaller response
  • Split your request into multiple oracle transactions
  • Contact us to request a higher gas allowance for your specific use case

How do I handle sensitive information in my requests?​

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Data entered into a smart contract is visible to the general public.

If you need to send sensitive information (like API keys) with your HTTP request:

  1. Fill out our data feed request form
  2. Specify in the notes that you'd like us to store your API key
  3. We'll store your keys on our private, secure, SOC-2 compliant infrastructure using 256-bit encryption, and provide you with a custom job ID that will trigger your API request safely and securely without your API keys ever touching the blockchain

Verifiable Random Numbers (VRN)​

What are Verifiable Random Numbers (VRN)?​

Verifiable Random Numbers are cryptographically secure random values that can be verified on-chain. Our VRN service:

  • Generates truly random numbers using secure entropy sources
  • Provides verification mechanisms to ensure randomness
  • Supports both single random numbers and arrays of random numbers
  • Offers both off-chain and on-chain verification options

How do I verify a random number?​

You have two options for verification:

Option 1 (off-chain):

  1. Call getHash(requestId) within your contract
  2. Visit our verification page with your chain ID and hash
  3. If the seed is available, it will be shown on the page
  4. Call verifyResult(requestId, seed) with the requestId and retrieved seed

Option 2 (on-chain):

  1. Ensure your contract has sufficient LINK token balance
  2. Call requestSeedFromOracle(requestId) with your requestId
  3. Wait several blocks for our oracle to call fulfillSeedFromOracle()
  4. Call verifyResult(requestId) to confirm verification

For more information, please visit our Verifiable Random Numbers (VRN) guide.

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Looking to request verifiable random numbers (VRNs)?​

Visit our data feed documentation, and select your desired network (ie, "Arbitrum mainnet") and data type (ie, "Verifiable random numbers (VRN / RNG)").

Pricing and Costs​

What are your service fees?​

We offer transparent and competitive pricing for all our services. For detailed pricing information, please visit our pricing page.

How do gas fees work?​

Gas fees are required for writing oracle updates on-chain and vary based on:

  • The blockchain network used
  • Smart contract design
  • Gas token price
  • Request volume
  • Response size and complexity

For specific gas fee requirements and minimum deposits, please visit our pricing page.

Do you offer any free services?​

Yes, we offer several free services for mainnet customers:

  • Basic assistance with implementation
  • Basic smart contract development for integrating with our oracle infrastructure
  • Basic external adapter development and hosting
  • Free hosting of external adapters on our redundant infrastructure
  • All testnet data feeds (0 LINK fee)

For a complete list of free services and premium features, please visit our pricing page.

Technical Support​

What kind of support do you offer?​

We offer multiple support tiers:

  1. Basic Support (Free for mainnet customers)
  2. Premium Support with dedicated channels
  3. Advisory Services

For detailed information about our support tiers and pricing, please visit our Development Services page.

What is included in your premium support?​

Premium support includes:

  • Dedicated on-call support channel with 8-hour response SLA
  • 24/7 monitoring of your data feed
  • External adapter development support
  • Smart contract implementation support
  • One 30-minute meeting per month
  • Faster response to custom job requests

For complete details about our premium support offerings, please visit our Development Services page.

Development Services​

What development services do you offer?​

Our development services include:

  • Smart contract development
  • External adapter development and hosting
  • AWS infrastructure design
  • Monitoring infrastructure setup
  • Chainlink node troubleshooting
  • Direct Request (Any API) implementation
  • Custom data processing pipelines
  • Secure API key storage and management

To get started with any of the above services, please visit our Development Services page.

How long does it take to develop an external adapter?​

For mainnet customers:

  • Basic external adapters: 1-2 business days (free)
  • Advanced customization available
  • Custom job IDs: 24 hours or less

For testnet customers:

  • Custom development timelines available

For specific pricing and timelines, please visit our pricing page.

Infrastructure and Security​

What makes your infrastructure reliable?​

Our infrastructure features:

  • Triple+ redundant systems
  • Highly secure environment
  • Zero-downtime architecture
  • 24/7 monitoring
  • Enterprise-grade security measures
  • Secure storage for sensitive information

Do you offer infrastructure monitoring?​

Yes, we provide comprehensive monitoring through:

  • AWS CloudWatch
  • Splunk
  • Custom monitoring solutions
  • 24/7 alerting system
  • Gas limit monitoring for failed transactions

Payment and Billing​

What payment methods do you accept?​

We accept various payment methods:

  • Cryptocurrency (ETH, USDC, USDT, POL, BNB, BTC, LINK, etc.)
  • Fiat currency (USD)
  • Other payment methods can be discussed

How often do you bill for services?​

  • Base fees are billed monthly
  • Gas fees are paid upfront with a minimum deposit
  • Development services are billed hourly
  • Support services are billed based on the selected plan

Additional Questions​

What if I need custom services not listed?​

We're flexible and can accommodate your custom requirements. Please contact us through one of the following means:

  1. Fill out our Request Survey for custom job IDs
  2. Join our Discord server
  3. Book a consultation through Calendly
  4. Contact us through our website

How can I stay updated with your services?​

You can stay updated by: