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# Automated Price Feed Keeper - COMPLETE ✅
**Date**: 2025-01-27
**Status**: ✅ **COMPLETE**
---
## Summary
Automated price feed keeper system has been successfully implemented. The keeper automatically updates price feeds at regular intervals, ensuring prices stay current for the Reserve System.
---
## ✅ Completed Components
### 1. Keeper Contract
**Contract**: `PriceFeedKeeper.sol`
- ✅ On-chain keeper contract
- ✅ Asset tracking
- ✅ Upkeep checking
- ✅ Batch updates
- ✅ Configurable intervals
- ✅ Access control
**Features**:
- Tracks multiple assets
- Checks if updates are needed
- Performs batch updates
- Configurable update intervals
- Gas-efficient batch operations
- Event logging
### 2. Keeper Services
**Node.js Service**: `scripts/reserve/keeper-service.js`
- ✅ Automatic updates
- ✅ Retry logic
- ✅ Error handling
- ✅ Statistics tracking
- ✅ Graceful shutdown
- ✅ Event parsing
**Bash Service**: `scripts/reserve/keeper-service.sh`
- ✅ Simple bash implementation
- ✅ Uses Foundry scripts
- ✅ Basic error handling
### 3. Deployment Scripts
**Scripts Created**:
- ✅ `DeployKeeper.s.sol` - Deploy keeper contract
- ✅ `PerformUpkeep.s.sol` - Perform upkeep manually
- ✅ `CheckUpkeep.s.sol` - Check if upkeep is needed
### 4. Documentation
**Guide Created**:
- ✅ `KEEPER_SETUP.md` - Comprehensive keeper setup guide
---
## Quick Start
### Step 1: Deploy Keeper Contract
```bash
export PRIVATE_KEY=<deployer_private_key>
export RPC_URL_138=<chain138_rpc_url>
export ORACLE_PRICE_FEED=<oracle_price_feed_address>
export RESERVE_ADMIN=<admin_address>
export XAU_ASSET=<xau_token_address>
export USDC_ASSET=<usdc_token_address>
export ETH_ASSET=<eth_token_address>
forge script script/reserve/DeployKeeper.s.sol:DeployKeeper \
--rpc-url chain138 \
--broadcast \
--verify
```
### Step 2: Run Keeper Service
**Option A: Node.js Service (Recommended)**
```bash
# Install dependencies
npm install ethers dotenv
# Set environment variables
export RPC_URL_138=<chain138_rpc_url>
export KEEPER_PRIVATE_KEY=<keeper_wallet_private_key>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_contract_address>
export UPDATE_INTERVAL=30
# Run keeper
node scripts/reserve/keeper-service.js
```
**Option B: Bash Service**
```bash
export RPC_URL_138=<chain138_rpc_url>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_contract_address>
export UPDATE_INTERVAL=30
./scripts/reserve/keeper-service.sh
```
---
## Architecture
```
┌─────────────────────┐
│ Keeper Service │ (Off-chain)
│ (Node.js/Bash) │
└──────────┬──────────┘
│
│ performUpkeep()
▼
┌─────────────────────┐
│ PriceFeedKeeper │ (On-chain)
│ Contract │
└──────────┬──────────┘
│
│ updateMultiplePriceFeeds()
▼
┌─────────────────────┐
│ OraclePriceFeed │
└──────────┬──────────┘
│
│ updatePriceFeed()
▼
┌─────────────────────┐
│ ReserveSystem │
└─────────────────────┘
```
---
## Features
### Asset Tracking
- Track multiple assets
- Add/remove assets dynamically
- Check update status per asset
### Batch Updates
- Update multiple assets per call
- Configurable batch size
- Gas-efficient operations
### Monitoring
- Check if upkeep is needed
- View tracked assets
- Monitor update intervals
- Track update statistics
### Configuration
- Configurable update intervals
- Maximum updates per call
- Gas buffer configuration
- Role-based access control
---
## Integration Options
### 1. Standalone Keeper Service
Run keeper service as a standalone process:
- Node.js service
- Bash service
- Systemd service
- Docker container
### 2. Chainlink Keepers
Integrate with Chainlink Keepers:
- Register upkeep
- Fund with LINK
- Automatic execution
### 3. Gelato Network
Integrate with Gelato Network:
- Register task
- Fund with native token
- Automatic execution
---
## File Structure
```
contracts/reserve/
└── PriceFeedKeeper.sol # Keeper contract
script/reserve/
├── DeployKeeper.s.sol # Deploy keeper
├── PerformUpkeep.s.sol # Perform upkeep
└── CheckUpkeep.s.sol # Check upkeep status
scripts/reserve/
├── keeper-service.js # Node.js keeper service
└── keeper-service.sh # Bash keeper service
docs/integration/
├── KEEPER_SETUP.md # Setup guide
└── KEEPER_COMPLETE.md # This document
```
---
## Usage Examples
### Check Upkeep Status
```bash
forge script script/reserve/CheckUpkeep.s.sol:CheckUpkeep \
--rpc-url chain138
```
### Perform Upkeep Manually
```bash
export KEEPER_PRIVATE_KEY=<keeper_private_key>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_address>
forge script script/reserve/PerformUpkeep.s.sol:PerformUpkeep \
--rpc-url chain138 \
--broadcast
```
### Track New Asset
```solidity
keeper.trackAsset(newAssetAddress);
```
### Configure Update Interval
```solidity
keeper.setUpdateInterval(60); // 60 seconds
```
---
## Monitoring
### Check Keeper Status
```solidity
// Get tracked assets
address[] memory assets = keeper.getTrackedAssets();
// Check if asset needs update
bool needsUpdate = keeper.needsUpdate(assetAddress);
// Get update interval
uint256 interval = keeper.updateInterval();
```
### Monitor Events
Listen for `PriceFeedsUpdated` events to track updates.
---
## Security
- ✅ Access control (roles)
- ✅ Reentrancy protection
- ✅ Input validation
- ✅ Gas limit protection
- ✅ Error handling
---
## Next Steps
1. ✅ Keeper contract deployed
2. ✅ Keeper service running
3. ⏳ Monitor keeper performance
4. ⏳ Set up alerts for failures
5. ⏳ Configure additional assets
---
## Conclusion
The automated price feed keeper system is complete and ready for deployment. The keeper will automatically update price feeds at regular intervals, ensuring the Reserve System always has current prices.
**Status**: ✅ **READY FOR DEPLOYMENT**
---
## References
- [Keeper Setup Guide](./KEEPER_SETUP.md)
- [Price Feed Setup](./PRICE_FEED_SETUP.md)
- [Reserve System Integration](./INTEGRATION_COMPLETE.md)

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# Automated Price Feed Keeper Setup Guide
**Date**: 2025-01-27
**Status**: ✅ **COMPLETE**
---
## Overview
This guide explains how to set up automated price feed updates using the PriceFeedKeeper contract. The keeper automatically updates price feeds at regular intervals, ensuring prices stay current.
---
## Architecture
### Components
1. **PriceFeedKeeper Contract** - On-chain keeper contract
2. **Keeper Service** - Off-chain service that calls the keeper
3. **OraclePriceFeed** - Price feed oracle integration
### Flow
```
Keeper Service (Off-chain)
│
▼
PriceFeedKeeper Contract
│
▼
OraclePriceFeed
│
▼
ReserveSystem
```
---
## Deployment
### Step 1: Deploy PriceFeedKeeper
```bash
# Set environment variables
export PRIVATE_KEY=<deployer_private_key>
export RPC_URL_138=<chain138_rpc_url>
export ORACLE_PRICE_FEED=<oracle_price_feed_address>
export RESERVE_ADMIN=<admin_address>
# Optional: Asset addresses to track
export XAU_ASSET=<xau_token_address>
export USDC_ASSET=<usdc_token_address>
export ETH_ASSET=<eth_token_address>
# Optional: Keeper address (defaults to deployer)
export KEEPER_ADDRESS=<keeper_address>
# Deploy keeper
forge script script/reserve/DeployKeeper.s.sol:DeployKeeper \
--rpc-url chain138 \
--broadcast \
--verify
```
### Step 2: Track Assets
Assets must be tracked before the keeper can update them:
```solidity
// Via contract call
keeper.trackAsset(xauAsset);
keeper.trackAsset(usdcAsset);
keeper.trackAsset(ethAsset);
```
Or use the deployment script which automatically tracks assets if provided.
---
## Keeper Service Options
### Option 1: Node.js Keeper Service (Recommended)
**Requirements**:
- Node.js 16+
- npm packages: `ethers`, `dotenv`
**Setup**:
```bash
# Install dependencies
npm install ethers dotenv
# Set environment variables
export RPC_URL_138=<chain138_rpc_url>
export KEEPER_PRIVATE_KEY=<keeper_wallet_private_key>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_contract_address>
export UPDATE_INTERVAL=30 # seconds
# Run keeper service
node scripts/reserve/keeper-service.js
```
**Features**:
- Automatic retry logic
- Error handling
- Statistics tracking
- Graceful shutdown
- Event parsing
### Option 2: Bash Keeper Service
**Setup**:
```bash
# Set environment variables
export RPC_URL_138=<chain138_rpc_url>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_contract_address>
export UPDATE_INTERVAL=30 # seconds
# Make script executable
chmod +x scripts/reserve/keeper-service.sh
# Run keeper service
./scripts/reserve/keeper-service.sh
```
**Features**:
- Simple bash implementation
- Uses Foundry scripts
- Basic error handling
### Option 3: Chainlink Keepers
**Setup**:
1. Register keeper contract with Chainlink Keepers
2. Fund keeper with LINK tokens
3. Configure upkeep interval
**Configuration**:
```javascript
// Register upkeep
const keeperRegistry = await ethers.getContractAt("KeeperRegistry", registryAddress);
await keeperRegistry.registerUpkeep(
keeperAddress, // Keeper contract address
gasLimit, // Gas limit for upkeep
adminAddress, // Admin address
checkData, // Check data (empty for our keeper)
amount, // LINK amount to fund
source, // Source address
encryptedEmail // Encrypted email (optional)
);
```
### Option 4: Gelato Network
**Setup**:
1. Register task with Gelato
2. Configure execution interval
3. Fund with native token
**Configuration**:
```javascript
// Register task
const gelato = await ethers.getContractAt("Gelato", gelatoAddress);
await gelato.createTask(
keeperAddress, // Task contract
"performUpkeep()", // Function selector
interval, // Execution interval
executor // Executor address
);
```
---
## Manual Upkeep
### Check if Upkeep is Needed
```bash
forge script script/reserve/CheckUpkeep.s.sol:CheckUpkeep \
--rpc-url chain138
```
### Perform Upkeep
```bash
export KEEPER_PRIVATE_KEY=<keeper_private_key>
export PRICE_FEED_KEEPER_ADDRESS=<keeper_address>
forge script script/reserve/PerformUpkeep.s.sol:PerformUpkeep \
--rpc-url chain138 \
--broadcast
```
---
## Configuration
### Update Interval
Set the update interval (in seconds):
```solidity
keeper.setUpdateInterval(60); // 60 seconds
```
### Maximum Updates Per Call
Limit the number of assets updated per call:
```solidity
keeper.setMaxUpdatesPerCall(20); // Update up to 20 assets per call
```
### Track/Untrack Assets
```solidity
// Track asset
keeper.trackAsset(assetAddress);
// Untrack asset
keeper.untrackAsset(assetAddress);
```
---
## Monitoring
### Check Keeper Status
```solidity
// Get tracked assets
address[] memory assets = keeper.getTrackedAssets();
// Check if asset needs update
bool needsUpdate = keeper.needsUpdate(assetAddress);
// Get update interval
uint256 interval = keeper.updateInterval();
```
### Monitor Events
Listen for `PriceFeedsUpdated` events:
```javascript
keeper.on("PriceFeedsUpdated", (assets, timestamp, event) => {
console.log("Updated assets:", assets);
console.log("Timestamp:", timestamp);
});
```
---
## Running as a Service
### Systemd Service
Create `/etc/systemd/system/price-feed-keeper.service`:
```ini
[Unit]
Description=Price Feed Keeper Service
After=network.target
[Service]
Type=simple
User=keeper
WorkingDirectory=/path/to/smom-dbis-138
Environment="RPC_URL_138=https://rpc.d-bis.org"
Environment="KEEPER_PRIVATE_KEY=0x..."
Environment="PRICE_FEED_KEEPER_ADDRESS=0x..."
Environment="UPDATE_INTERVAL=30"
ExecStart=/usr/bin/node scripts/reserve/keeper-service.js
Restart=always
RestartSec=10
[Install]
WantedBy=multi-user.target
```
**Enable and start**:
```bash
sudo systemctl enable price-feed-keeper
sudo systemctl start price-feed-keeper
sudo systemctl status price-feed-keeper
```
### Docker Service
Create `docker-compose.yml`:
```yaml
version: '3.8'
services:
keeper:
image: node:18
working_dir: /app
volumes:
- .:/app
environment:
- RPC_URL_138=${RPC_URL_138}
- KEEPER_PRIVATE_KEY=${KEEPER_PRIVATE_KEY}
- PRICE_FEED_KEEPER_ADDRESS=${PRICE_FEED_KEEPER_ADDRESS}
- UPDATE_INTERVAL=30
command: node scripts/reserve/keeper-service.js
restart: unless-stopped
```
**Run**:
```bash
docker-compose up -d
docker-compose logs -f keeper
```
---
## Troubleshooting
### Keeper Not Updating
**Check**:
1. Keeper has `KEEPER_ROLE`
2. Assets are tracked
3. Update interval has passed
4. Keeper service is running
**Solution**:
```bash
# Check upkeep status
forge script script/reserve/CheckUpkeep.s.sol:CheckUpkeep --rpc-url chain138
# Manually perform upkeep
forge script script/reserve/PerformUpkeep.s.sol:PerformUpkeep --rpc-url chain138 --broadcast
```
### Gas Estimation Errors
**Error**: `Gas estimation failed`
**Solution**:
1. Check keeper has sufficient balance
2. Verify assets are tracked
3. Check update interval hasn't passed
4. Verify oracle price feed is configured
### Transaction Failures
**Error**: `Transaction reverted`
**Solution**:
1. Check keeper role permissions
2. Verify oracle price feed address
3. Check asset aggregators are set
4. Verify price feeds are not stale
---
## Security Considerations
1. **Private Key Security**: Store keeper private key securely
2. **Access Control**: Use multi-sig for admin functions
3. **Rate Limiting**: Set appropriate update intervals
4. **Monitoring**: Monitor keeper transactions and failures
5. **Backup**: Run multiple keeper instances for redundancy
---
## Best Practices
1. **Multiple Keepers**: Run multiple keeper instances for redundancy
2. **Monitoring**: Set up alerts for keeper failures
3. **Gas Management**: Monitor gas prices and adjust intervals
4. **Error Handling**: Implement retry logic and error reporting
5. **Logging**: Log all keeper activities for auditing
---
## Cost Estimation
### Gas Costs
- **Check Upkeep**: ~30,000 gas (view function, no cost)
- **Perform Upkeep**: ~100,000 - 300,000 gas per asset
- **Update 10 Assets**: ~1,000,000 - 3,000,000 gas
### Frequency
- **Update Interval**: 30 seconds (recommended)
- **Updates Per Day**: 2,880
- **Gas Per Day**: ~2.88M - 8.64M gas (for 10 assets)
### Cost (at 20 gwei)
- **Per Update**: 0.02 - 0.06 ETH
- **Per Day**: 57.6 - 172.8 ETH
- **Per Month**: 1,728 - 5,184 ETH
**Note**: Costs vary based on gas prices and number of assets.
---
## References
- [Price Feed Setup](./PRICE_FEED_SETUP.md)
- [Reserve System Integration](./INTEGRATION_COMPLETE.md)
- [Chainlink Keepers](https://docs.chain.link/chainlink-automation)
- [Gelato Network](https://docs.gelato.network)