Chainlink Integration

The GasCreditVault contract integrates with Chainlink's decentralized oracle network to provide reliable, real-time price feeds for accurate token-to-credit conversions. This integration ensures fair pricing, prevents oracle manipulation attacks, and maintains system integrity across volatile market conditions.

Overview

Chainlink integration in GasCreditVault provides:

• Real-time price feeds from decentralized oracles

• Multiple aggregation sources for price accuracy

• Staleness protection against outdated data

Architecture

flowchart TB
    subgraph "Chainlink Network"
        A[Oracle Nodes] --> B[Price Aggregation]
        B --> C[On-chain Feed]
        C --> D[Latest Round Data]
    end
    
    subgraph "GasCreditVault"
        E[Price Request] --> F[Feed Validation]
        F --> G[Staleness Check]
        G --> H[Price Processing]
        H --> I[Credit Calculation]
    end
    
    subgraph "Safety Mechanisms"
        J[Circuit Breakers] --> H
        K[Fallback Feeds] --> F
        L[Price Bounds] --> H
    end
    
    D --> E

Price Feed Interface

Chainlink Aggregator Integration

TokenInfo memory info = tokenInfo[token];
uint8 tokenDecimals = IERC20Metadata(token).decimals();

if (info.isStablecoin) {
    return convertDecimals(creditAmount, creditDecimals, tokenDecimals);
}

(uint80 roundId, int256 price, , uint256 updatedAt, uint80 answeredInRound) = info.priceFeed.latestRoundData();

Best Practices

For Administrators

1. Use multiple price feeds for critical tokens

2. Set appropriate heartbeats based on token volatility

3. Monitor feed health regularly

4. Have emergency procedures for feed failures

5. Test price feeds thoroughly before deployment

For Developers

1. Handle price feed failures gracefully

2. Implement proper staleness checks

3. Use fallback mechanisms for reliability

4. Cache prices appropriately to reduce calls

5. Monitor price deviations for anomalies

For Integration

1. Validate price data before using

2. Handle network delays and timeouts

3. Implement retry logic for failed requests

4. Use websockets for real-time price updates

5. Monitor gas costs of price operations

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Related Topics:

• Multi-Token Support - Token configuration with price feeds

• Credit Management - Using prices for credit calculations

• GasCreditVault Overview - Main contract documentation