# Wrap ETH to WETH9 and Bridge to Ethereum Mainnet

**Purpose**: Guide for wrapping ETH to WETH9 on Chain 138 and bridging to Ethereum Mainnet

---

## Quick Start

```bash
# Wrap and bridge 20,000 ETH to Ethereum Mainnet
cd /home/intlc/projects/proxmox/smom-dbis-138
./scripts/wrap-and-bridge-weth9-to-mainnet.sh 20000 <recipient_address> <private_key>

# Or use environment variable for private key
export PRIVATE_KEY=0x...
./scripts/wrap-and-bridge-weth9-to-mainnet.sh 20000 <recipient_address>
```

---

## Prerequisites

1. **ETH Balance**: Sufficient ETH on Chain 138 for wrapping
2. **LINK Tokens**: LINK tokens for paying CCIP fees (typically 0.1-2 LINK)
3. **Private Key**: Wallet with ETH and LINK tokens
4. **Recipient Address**: Ethereum Mainnet address to receive WETH9 (can be same as sender)

---

## Contract Addresses

### Chain 138
- **WETH9**: `0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2`
- **CCIPWETH9Bridge**: `0x89dd12025bfCD38A168455A44B400e913ED33BE2`
- **LINK Token**: `0x514910771AF9Ca656af840dff83E8264EcF986CA`

### Ethereum Mainnet
- **WETH9**: `0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2` (same address)
- **CCIPWETH9Bridge**: `0x2A0840e5117683b11682ac46f5CF5621E67269E3`
- **Chain Selector**: `5009297550715157269`

---

## Process Flow

```
1. Check ETH Balance
   ↓
2. Wrap ETH → WETH9 (deposit())
   ↓
3. Approve Bridge (approve())
   ↓
4. Check LINK Balance
   ↓
5. Bridge to Mainnet (sendCrossChain())
   ↓
6. Wait for CCIP Confirmation (1-5 minutes)
   ↓
7. WETH9 appears on Ethereum Mainnet
```

---

## Step-by-Step Manual Process

### Step 1: Wrap ETH to WETH9

```bash
AMOUNT_WEI=$(cast --to-wei 20000 ether)

cast send "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2" \
  "deposit()" \
  --value "$AMOUNT_WEI" \
  --rpc-url http://192.168.11.250:8545 \
  --private-key 0x... \
  --gas-price 20000000000 \
  --legacy
```

### Step 2: Approve Bridge

```bash
MAX_UINT256="115792089237316195423570985008687907853269984665640564039457584007913129639935"

cast send "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2" \
  "approve(address,uint256)" \
  "0x89dd12025bfCD38A168455A44B400e913ED33BE2" \
  "$MAX_UINT256" \
  --rpc-url http://192.168.11.250:8545 \
  --private-key 0x... \
  --gas-price 20000000000 \
  --legacy
```

### Step 3: Bridge to Ethereum Mainnet

```bash
RECIPIENT="0xYourMainnetAddress"
ETHEREUM_SELECTOR="5009297550715157269"
AMOUNT_WEI=$(cast --to-wei 20000 ether)

cast send "0x89dd12025bfCD38A168455A44B400e913ED33BE2" \
  "sendCrossChain(uint64,address,uint256)" \
  "$ETHEREUM_SELECTOR" \
  "$RECIPIENT" \
  "$AMOUNT_WEI" \
  --rpc-url http://192.168.11.250:8545 \
  --private-key 0x... \
  --gas-price 20000000000 \
  --legacy
```

---

## Verification

### Check WETH9 Balance (Chain 138)

```bash
cast call "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2" \
  "balanceOf(address)" \
  "0xYourAddress" \
  --rpc-url http://192.168.11.250:8545
```

### Check Bridge Allowance

```bash
cast call "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2" \
  "allowance(address,address)" \
  "0xYourAddress" \
  "0x89dd12025bfCD38A168455A44B400e913ED33BE2" \
  --rpc-url http://192.168.11.250:8545
```

### Check WETH9 Balance (Ethereum Mainnet)

After bridge completes (wait 1-5 minutes):

```bash
cast call "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2" \
  "balanceOf(address)" \
  "0xYourMainnetAddress" \
  --rpc-url https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY
```

---

## Safety Considerations

### Large Amount Warnings

For amounts > 1,000 ETH, the script will:
- Display warning messages
- Request confirmation before wrapping
- Request final confirmation before bridging

### Gas Fees

- **Wrap Transaction**: ~50,000 gas
- **Approve Transaction**: ~50,000 gas
- **Bridge Transaction**: ~200,000-500,000 gas
- **CCIP Fees**: Paid in LINK tokens (0.1-2 LINK typically)

### Timing

- **Wrap**: ~15 seconds (block confirmation)
- **Approve**: ~10 seconds (block confirmation)
- **Bridge**: ~1-5 minutes (CCIP confirmation)

---

## Troubleshooting

### Insufficient ETH Balance

```
Error: Insufficient ETH balance
```

**Solution**: Ensure you have enough ETH to cover:
- Amount to wrap
- Gas fees for all transactions

### Insufficient LINK Balance

```
Warning: Low LINK balance
```

**Solution**: Acquire LINK tokens on Chain 138 for CCIP fees

### Bridge Transaction Fails

**Possible Causes**:
1. Destination not configured on bridge
2. Insufficient LINK for fees
3. Insufficient gas

**Solution**: Check bridge destination configuration:

```bash
cast call "0x89dd12025bfCD38A168455A44B400e913ED33BE2" \
  "destinations(uint64)" \
  "5009297550715157269" \
  --rpc-url http://192.168.11.250:8545
```

---

## Example: Bridge 20,000 ETH

```bash
# Set environment
export PRIVATE_KEY=0xYourPrivateKey
export RPC_URL_138=http://192.168.11.250:8545

# Execute bridge
./scripts/wrap-and-bridge-weth9-to-mainnet.sh 20000 0xYourMainnetAddress

# The script will:
# 1. Check ETH balance
# 2. Wrap 20,000 ETH to WETH9
# 3. Approve bridge
# 4. Bridge to Ethereum Mainnet
# 5. Display transaction hash and next steps
```

---

## Cost Estimate (20,000 ETH)

| Item | Cost |
|------|------|
| Wrap Gas | ~0.001 ETH |
| Approve Gas | ~0.001 ETH |
| Bridge Gas | ~0.005 ETH |
| CCIP Fee (LINK) | ~0.5-2 LINK |
| **Total ETH Cost** | **~0.007 ETH** |
| **Total LINK Cost** | **~0.5-2 LINK** |

---

## Related Documentation

- [Bridge Addresses Reference (Archived)](../../../docs/archive/historical/ALL_BRIDGE_ADDRESSES_AND_ROUTES.md)
- [CCIP Integration Guide](../operations/integrations/CCIP_INTEGRATION.md)
- [WETH9 Contract Documentation](../architecture/PREDEPLOYED_WETH_ARCHITECTURE.md)

---

**Last Updated**: 2025-01-12