proxmox/docs/06-besu/GAS_PRICE_RESOLUTION.md

# Gas Price Issue - Resolution Guide

**Last Updated:** 2026-01-31  
**Document Version:** 1.0  
**Status:** Active Documentation

---

**Date**: 2026-01-18  
**Issue**: Transaction not mined due to gas price below network minimum  
**Status**: ⚠️ **RESOLUTION IDENTIFIED**

---

## 🔍 Problem Analysis

### Issue
- Transaction submitted with: **1000 wei** gas price
- Network requires: **1,000,000,000 wei** (1 gwei)
- Result: Transaction rejected by Besu, not included in any block

### Evidence
```bash
Transaction Hash: 0x1b786e061eefc0dc8dee4fc23071314f94096f8e701c978539e793a32ccd1012
Gas Price Used: 1000 wei
Effective Gas Price: 1000 wei
Block Hash: (empty - not mined)
```

### Configuration
From `config/chain138.json`:
```json
{
  "gasPrice": "1000000000"  // 1 gwei = 1,000,000,000 wei
}
```

**Gap**: Transaction used 1,000,000x less than required!

---

## ✅ Solution: Deploy with Dynamic Gas Price Calculation

### Option 1: Automated Deployment (Recommended)

Use the automated script that calculates gas price from API:

```bash
cd /home/intlc/projects/proxmox
./scripts/deploy-phase3-bridges-with-gas-api.sh
```

This script:
- ✅ Fetches current gas price from ChainID 138 RPC
- ✅ Respects minimum gas price from config (1 gwei)
- ✅ Applies safety multiplier (10% buffer)
- ✅ Deploys both bridges with optimal gas price
- ✅ Verifies deployments automatically

### Option 2: Manual Calculation

First, calculate optimal gas price:

```bash
cd /home/intlc/projects/proxmox
GAS_PRICE=$(./scripts/calculate-chain138-gas-price.sh)
echo "Using gas price: $GAS_PRICE wei"
```

Then deploy with calculated gas price:

```bash
cd /home/intlc/projects/proxmox/smom-dbis-138
PK="5373d11ee2cad4ed82b9208526a8c358839cbfe325919fb250f062a25153d1c8"
RPC="http://192.168.11.211:8545"

# Deploy WETH9 Bridge
forge script script/DeployCCIPWETH9Bridge.s.sol:DeployCCIPWETH9Bridge \
    --rpc-url "$RPC" \
    --broadcast \
    --private-key "0x$PK" \
    --gas-price "$GAS_PRICE" \
    --slow \
    -vvvv

# Deploy WETH10 Bridge
forge script script/DeployCCIPWETH10Bridge.s.sol:DeployCCIPWETH10Bridge \
    --rpc-url "$RPC" \
    --broadcast \
    --private-key "0x$PK" \
    --gas-price "$GAS_PRICE" \
    --slow \
    -vvvv
```

### Option 3: Fixed Gas Price (Fallback)

If gas API is unavailable, use minimum from config:

```bash
# Use 1 gwei (minimum required)
GAS_PRICE=1000000000
```

### Alternative: Use EIP-1559 Format

If the above doesn't work, try EIP-1559 format:

```bash
forge script script/DeployCCIPWETH9Bridge.s.sol:DeployCCIPWETH9Bridge \
    --rpc-url "$RPC" \
    --broadcast \
    --private-key "0x$PK" \
    --max-fee-per-gas 1000000000 \
    --priority-fee-per-gas 100000000 \
    --slow \
    -vvvv
```

---

## 🧪 Verification After Deployment

```bash
# Check if contract is deployed
cast code 0x646e0026F8B5BCB94986377a25Da6f89BdCbBF6e --rpc-url "$RPC"

# Verify admin
cast call 0x646e0026F8B5BCB94986377a25Da6f89BdCbBF6e \
    "admin()(address)" \
    --rpc-url "$RPC"
# Expected: 0x4A666F96fC8764181194447A7dFdb7d471b301C8

# Verify router
cast call 0x646e0026F8B5BCB94986377a25Da6f89BdCbBF6e \
    "ccipRouter()(address)" \
    --rpc-url "$RPC"
# Expected: 0x8078A09637e47Fa5Ed34F626046Ea2094a5CDE5e

# Verify functions exist
cast 4byte "addDestination(uint64,address)"
cast 4byte "getDestinationChains()(uint64[])"
```

---

## 📝 Notes

1. **Why `--slow` flag?**: Gives Foundry more time to submit and confirm transaction
2. **Gas Price Units**: Always use wei (not gwei) in forge commands
3. **Transaction Format**: Legacy (`--gas-price`) should work, but EIP-1559 is fallback
4. **Expected Cost**: 1,962,548 gas × 1 gwei = ~0.00196 ETH per deployment

---

**Status**: ✅ **RESOLUTION IDENTIFIED - READY TO DEPLOY**

**Next Action**: Run deployment commands with `--gas-price 1000000000` (1 gwei)

---

**Last Updated**: 2026-01-18