# Quick Start: Real-Time Gas Price Updates

**Last Updated**: 2025-01-27

## 🚀 One-Command Update

Update all gas estimates with real-time prices:

```bash
./scripts/deployment/get-multichain-gas-prices.sh && ./scripts/deployment/update-gas-estimates.sh
```

## What This Does

1. **Fetches Real-Time Gas Prices** from:
   - Etherscan API (Ethereum Mainnet)
   - RPC endpoints (all other chains)

2. **Calculates Costs**:
   - In native tokens (ETH, CRO, BNB, MATIC, xDAI)
   - In USD (using approximate exchange rates)

3. **Updates Documentation**:
   - `GAS_AND_TOKEN_REQUIREMENTS.md`
   - `TOKENS_AND_CHAINS_SUMMARY.md`
   - `DEPLOYMENT_QUICK_REFERENCE.md`

## Prerequisites

Ensure `.env` has:
```bash
ETHERSCAN_API_KEY=your_key_here
ETH_MAINNET_RPC_URL=https://...
CRONOS_RPC_URL=https://...
BSC_RPC_URL=https://...
POLYGON_RPC_URL=https://...
GNOSIS_RPC_URL=https://...
```

## Output

After running, you'll see:
- Current gas prices for all chains
- Deployment cost estimates
- Total estimated cost in USD
- Confirmation of documentation updates

## Example Output

```
========================================
Multichain Gas Price Fetcher
========================================

Current Gas Prices:
  Ethereum Mainnet: 0.14 gwei
  Cronos: 378.75 gwei
  BSC: 0.05 gwei
  Polygon: 34.61 gwei
  Gnosis: 0 gwei

Deployment Cost Estimates:
  Ethereum Mainnet: 0.000384 ETH (~$0.96)
  Cronos: 3.32 CRO (~$0.27)
  BSC: 0.000438 BNB (~$0.13)
  Polygon: 0.303 MATIC (~$0.24)
  Gnosis: 0.000025 xDAI (~$0.00)

Total Estimated Cost: ~$1.69 USD

✓ All documentation updated with real-time gas prices
```

## Troubleshooting

**Script fails?**
- Check `.env` has required variables
- Verify API keys are valid
- Test RPC endpoints: `cast gas-price --rpc-url $ETH_MAINNET_RPC_URL`

**Documentation not updating?**
- Check file permissions
- Verify JSON file exists: `cat /tmp/multichain_gas_prices.json`

---

**For detailed information, see**: [Real-Time Gas System](./REAL_TIME_GAS_SYSTEM.md)