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Deposit ETH from L1 to L2

Transfer ETH from Ethereum mainnet to TeQoin L2 quickly and safely.
Quick Facts:
  • ⏱️ Time: ~15 minutes
  • 💰 L1 Gas Fee: $10-50 (varies with Ethereum gas price)
  • 💰 L2 Fee: $0 (covered by bridge)
  • 🔄 Ratio: 1 ETH on L1 = 1 ETH on L2
  • ✅ Cancellable: No (irreversible once confirmed)

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📋 Prerequisites

Before you start, make sure you have:
1

ETH on Ethereum L1

You need ETH on Ethereum mainnet to deposit.Minimum recommended: 0.01 ETH (to cover gas + deposit amount)
2

Wallet with L1 Connection

  • MetaMask installed and connected to Ethereum Mainnet
  • Or TeQoin Telegram Wallet
  • Sufficient ETH for gas fees + deposit amount
3

TeQoin L2 Added to Wallet

Add TeQoin L2 network to receive fundsAdd Network Guide →

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🌉 How Deposits Work

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The Process

Step-by-step:
  1. You send ETH to L1 bridge contract
  2. ETH is locked on Ethereum L1
  3. Bridge emits event that sequencer monitors
  4. Sequencer relays message to L2
  5. L2 mints equivalent ETH (1:1 ratio)
  6. You receive ETH on TeQoin L2
Total time: ~15 minutes

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🎯 Step-by-Step Guide

1

Visit the Bridge

Go to the official TeQoin bridge:🔗 https://bridge.teqoin.io
Security Alert: Always verify you’re on the official bridge URL. Bookmark it to avoid phishing sites.
2

Connect Wallet

  1. Click “Connect Wallet”
  2. Select your wallet (MetaMask, WalletConnect, etc.)
  3. Approve the connection
Important: Make sure you’re connected to Ethereum Mainnet (not a testnet)
Check the network indicator in your wallet. It should show “Ethereum Mainnet” or “Mainnet”.
3

Select Deposit Tab

Click the “Deposit” or “L1 → L2” tabThe interface should show:
  • From: Ethereum Mainnet
  • To: TeQoin L2
4

Enter Amount

Enter the amount of ETH you want to depositExamples:
  • 0.1 - Deposit 0.1 ETH
  • 1.5 - Deposit 1.5 ETH
  • Click “Max” to deposit all available ETH (minus gas)
Recommended minimum: 0.01 ETHThis ensures the deposit is worthwhile considering L1 gas fees.
5

Review Transaction Details

The bridge will show:
DetailInformation
Amount to DepositETH you’re sending
You’ll ReceiveSame amount on L2
L1 Gas FeeEthereum transaction cost
Estimated Time~15 minutes
Bridge Fee$0 (no bridge fee)
Review carefully and make sure everything is correct.
6

Approve Transaction

  1. Click “Deposit” or “Bridge ETH”
  2. MetaMask popup appears
  3. Review transaction in MetaMask:
    • To: L1 Bridge Contract (0x919aa27d5278BC98bf40BA5A79be468B91f061dA)
    • Amount: Your deposit amount
    • Gas Fee: Ethereum L1 gas cost
  4. Click “Confirm” in MetaMask
Double-check the contract address!L1 Bridge: 0x919aa27d5278BC98bf40BA5A79be468B91f061dAIf it’s different, DO NOT proceed!
7

Wait for L1 Confirmation

Your transaction is submitted to Ethereum:
  • Status: Pending
  • Time: 2-5 minutes (depends on gas price)
  • Confirmations: Wait for ~12 confirmations
You’ll see:
  • Transaction hash
  • Pending status indicator
  • Link to view on Etherscan
Click the transaction hash to track it on Etherscan in real-time.
8

Automatic L2 Processing

Once L1 transaction confirms:
  1. Bridge detects the deposit event
  2. Sequencer processes the deposit
  3. L2 bridge mints equivalent ETH
  4. ETH appears in your L2 wallet
Time: 5-10 minutes after L1 confirmationThe bridge interface shows:
  • ✅ L1 transaction confirmed
  • 🔄 Processing on L2
  • ⏳ Waiting for L2 credit
9

Verify on L2

After ~15 minutes total:
  1. Switch to TeQoin L2 network in your wallet
  2. Check your balance - it should have increased
  3. View transaction on https://explorer.teqoin.io
✅ Deposit Complete! You now have ETH on TeQoin L2.

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Method 2: Direct Contract Interaction (Advanced)

For developers or advanced users who want to interact with the contract directly. 
import { ethers } from 'ethers';

// Connect to Ethereum L1
const provider = new ethers.BrowserProvider(window.ethereum);
const signer = await provider.getSigner();

// L1 Bridge contract
const L1_BRIDGE = '0x919aa27d5278BC98bf40BA5A79be468B91f061dA';
const bridgeABI = [
  'function depositETH() payable'
];

const bridge = new ethers.Contract(L1_BRIDGE, bridgeABI, signer);

// Deposit 0.1 ETH
const tx = await bridge.depositETH({
  value: ethers.parseEther('0.1')
});

console.log('Deposit transaction:', tx.hash);

// Wait for confirmation
const receipt = await tx.wait();
console.log('Confirmed in block:', receipt.blockNumber);

// Switch to L2 and check balance after ~15 minutes

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💰 Cost Breakdown

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Example: Deposit 1 ETH

Amount to Deposit:           1.0 ETH
─────────────────────────────────────
L1 Gas Fee (variable):      ~0.005 ETH ($10-20)
L2 Processing Fee:           0 ETH (free)
Bridge Fee:                  0 ETH (no fee)
─────────────────────────────────────
Total Cost:                 ~0.005 ETH
You Receive on L2:           1.0 ETH

Effective Cost:             ~0.5% (gas only)

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Gas Price Optimization

Cheapest times (Ethereum gas is low):
  • 🌙 Late night (2-6 AM US Eastern Time)
  • 📅 Weekends (Saturday-Sunday)
  • 🏖️ Holidays
Most expensive times:
  • 📈 Weekday afternoons (US trading hours)
  • 🚀 During NFT mints or major events
  • ⏰ Peak DeFi activity hours
Check current gas prices:

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📊 Tracking Your Deposit

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On the Bridge Interface

The bridge shows deposit status: 
✅ Step 1: Transaction Submitted
⏳ Step 2: Waiting for L1 Confirmation (2-5 min)
⏳ Step 3: Processing on L2 (5-10 min)
⏳ Step 4: ETH Credited to L2

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On Block Explorers

View L1 transaction:
  1. Go to https://etherscan.io
  2. Paste your transaction hash
  3. Verify:
    • ✅ Status: Success
    • ✅ To: L1 Bridge Contract
    • ✅ Value: Your deposit amount
    • ✅ Confirmations: 12+

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🔧 Troubleshooting

Possible causes:
  • L1 transaction hasn’t confirmed yet
  • Used too low gas price
  • Network congestion on Ethereum
Solution:
  1. Check L1 transaction on Etherscan
  2. If still pending on L1:
    • Wait longer (may take hours with low gas)
    • Or speed up with higher gas (MetaMask “Speed Up” option)
  3. If L1 confirmed but not on L2:
    • Wait another 30 minutes
    • Check bridge status page
    • Contact support with TX hash
Common reasons:
  • Insufficient ETH for gas
  • Too low gas limit
  • Network error
Solution:
  1. Check error message on Etherscan
  2. If “out of gas”: Retry with higher gas limit
  3. If “insufficient funds”: Add more ETH and retry
  4. Your deposit was NOT processed - funds are still on L1
L1 confirmed but L2 credit delayed.Solution:
  1. Verify L1 transaction succeeded on Etherscan
  2. Check your L2 wallet address is correct
  3. Make sure you’re on TeQoin L2 network
  4. Refresh wallet (disconnect/reconnect)
  5. Check explorer.teqoin.io for incoming transaction
  6. If still missing after 2 hours, contact support
Accidentally used Sepolia or another testnet.Solution:
  • Testnet ETH has no value - this is expected
  • Mainnet and testnet are completely separate
  • For mainnet deposits, connect to Ethereum Mainnet
  • Your funds are not lost, just on the wrong network
Manually sent ETH to contract address without calling depositETH().Solution:
  • If you called depositETH(): Should process normally
  • If you sent plain ETH transfer: Funds may be stuck
  • Contact support immediately with transaction hash
  • May be recoverable depending on the situation
Always use the bridge interface to avoid this!
Deposits cannot be cancelled once the L1 transaction is confirmed.Options:
  • Let it complete (~15 minutes)
  • Once on L2, you can withdraw back to L1 (7 days)
  • Or keep funds on L2 for low-fee transactions

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✅ Post-Deposit Checklist

After your deposit completes:
1

Verify L2 Balance

    1. Switch to TeQoin L2 in wallet
    2. Check balance increased by deposit amount
    3. Note: Balance might not update instantly - refresh wallet
2

Save Transaction Records

    # Keep these for your records:
    - L1 transaction hash
    - L2 transaction hash
    - Deposit amount
    - Date and time
    - Bridge used
3

Start Using L2

Now you can:
  • Make low-fee transactions
  • Deploy smart contracts
  • Use TeQoin dApps
  • Trade on DEXs
First Transaction Guide →

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💡 Best Practices

Test with Small Amount FirstFor your first deposit:
  1. Send a small amount (0.01 ETH)
  2. Verify it arrives on L2
  3. Then deposit larger amounts
Keep Some ETH on L1Don’t deposit all your ETH to L2:
  • Keep some on L1 for gas fees
  • You might need L1 ETH for future deposits
  • Withdrawals back to L1 take 7 days
Document EverythingKeep records of:
  • Transaction hashes
  • Amounts deposited
  • Dates
  • Wallet addresses used
This helps with:
  • Tax reporting
  • Troubleshooting
  • Portfolio tracking

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🎯 Next Steps

Make Your First Transaction

Use your L2 ETH to make low-fee transactions

Withdraw to L1

Learn how to move ETH back to Ethereum

Deploy a Contract

Use your L2 ETH to deploy smart contracts

Bridge FAQ

Common questions about bridging
Deposit successful? Start making low-fee transactions on TeQoin L2! 🚀