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The TeQoin bridge allows you to move ETH between Ethereum (L1) and TeQoin L2 safely and efficiently.
Key Concepts:
  • Deposit (L1 → L2): Fast (~15 minutes)
  • Withdraw (L2 → L1): Secure (7 days)
  • 1:1 Backing: 1 ETH on L1 = 1 ETH on L2
  • Security: Optimistic rollup with fraud proofs

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🌉 What is the Bridge?

The TeQoin bridge is a set of smart contracts that enables trustless transfer of assets between Ethereum L1 and TeQoin L2.

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How It Works

Process:
  1. You send ETH to the L1 bridge contract
  2. Your ETH is locked on Ethereum
  3. Bridge sends a message to L2
  4. Equivalent ETH is minted on TeQoin L2
  5. You receive ETH on L2 (1:1 ratio)
Time: ~15 minutes
Cost: Ethereum L1 gas fee ($10-50)

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🔑 Key Features

Trustless

No intermediaries - secured by smart contracts and fraud proofs

1:1 Backing

Every ETH on L2 is backed by locked ETH on L1

Secure

Optimistic rollup with 7-day challenge period

Transparent

All transactions visible on-chain

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📊 Comparison: Deposit vs Withdraw

FeatureDeposit (L1 → L2)Withdraw (L2 → L1)
Time~15 minutes7 days + 15 min
L1 Gas$10-50 (deposit)$10-30 (finalize)
L2 Gas~$0 (covered)~$0.001 (initiate)
Steps1 transaction2 transactions
ComplexitySimpleModerate
CancellableNoNo

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🔐 Security Model

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Optimistic Rollup Security

TeQoin uses optimistic rollup technology, which means:
1

Optimistic Assumption

Transactions are assumed to be valid by default
2

Challenge Period

For withdrawals, there’s a 7-day window where anyone can challenge invalid transactions
3

Fraud Proofs

If someone submits invalid data, fraud proofs can be submitted to prove it’s wrong
4

Automatic Reversion

Invalid transactions are reverted, and the challenger is rewarded
Why 7 Days?The 7-day challenge period is a security feature, not a limitation. It ensures:
  • ✅ Enough time for fraud detection
  • ✅ Decentralized security (anyone can verify)
  • ✅ No trust in the sequencer required
  • ✅ Your funds are always safe

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💰 Bridge Contracts

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L1 Bridge Contract (Ethereum)

Address: 0x919aa27d5278BC98bf40BA5A79be468B91f061dA
Network: Ethereum Mainnet
Chain ID: 1
Functions:
  • depositETH() - Deposit ETH to L2
  • finalizeWithdrawal() - Complete withdrawal from L2

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L2 Bridge Contract (TeQoin)

Address: 0x4200000000000000000000000000000000000010
Network: TeQoin L2
Chain ID: 420377
Functions:
  • initiateWithdrawal() - Start withdrawal to L1
  • withdraw() - Alias for initiateWithdrawal
View Contract ABIs →

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📈 Bridge Statistics

Total Value Locked

$5.2METH locked in bridge

Total Bridges

25,000+Successful transfers

Success Rate

99.99%Bridge reliability

Average Deposit Time

12 minutesL1 → L2 transfer

Total Users

8,500+Unique addresses

Uptime

99.9%Bridge availability

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🎯 Use Cases

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When to Use Deposits (L1 → L2)

Start Using TeQoin

Move ETH to L2 to start making low-fee transactions

Deploy Contracts

Bridge ETH to deploy smart contracts on L2

Use dApps

Access TeQoin L2 DeFi, NFTs, and games

Save on Fees

Move funds to L2 for low-cost operations

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When to Use Withdrawals (L2 → L1)

Return to L1

Move funds back to Ethereum mainnet

Use L1 DeFi

Access Ethereum L1 DeFi protocols

Cash Out

Withdraw to L1 for exchange deposits

Long-term Storage

Move to L1 cold storage

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⚠️ Important Considerations

Withdrawals take 7 days due to the challenge period.Plan accordingly:
  • Need L1 funds urgently? Keep some on L1
  • Start withdrawal 7 days before you need the funds
  • Use third-party bridges for faster withdrawals (less secure)
Why can’t it be instant?The 7-day period is a security feature. It allows time for:
  • Fraud detection
  • Challenge submission
  • Proof verification
This is what makes TeQoin secure without trusting centralized parties.
L1 Gas Fees:
  • Deposits: $10-50 (depends on Ethereum gas price)
  • Finalization: $10-30 (depends on Ethereum gas price)
L2 Gas Fees:
  • Initiate withdrawal: ~$0.001 (very low)
  • Covered by bridge for deposits
Tips to save on gas:
Recommended Minimums:
  • Deposit: 0.01 ETH (to cover L1 gas)
  • Withdraw: 0.05 ETH (to cover both L2 and L1 gas)
Maximum:
  • No hard limit
  • Practical limit: Bridge capacity (~1000 ETH per transaction)
For large amounts:
  • Consider splitting into multiple transactions
  • Contact support for assistance with very large transfers
The bridge is highly reliable:
  • 99.9% uptime
  • Automated monitoring
  • Redundant infrastructure
In rare cases of downtime:
  • Your funds are always safe in the smart contracts
  • Deposits/withdrawals will process when bridge resumes
  • Check status at https://status.teqoin.io
Current Support:
  • ✅ ETH (native currency)
Coming Soon:
  • ERC-20 token bridging
  • ERC-721 NFT bridging
For now, only ETH can be bridged between L1 and L2.

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🛠️ Bridge Interface

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Official Bridge

URL: https://bridge.teqoin.io Features:
  • User-friendly interface
  • Transaction tracking
  • Real-time status updates
  • Historical bridge transactions
  • Gas price estimates

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Alternative Methods

Interact with bridge contracts directly via code.View developer guide →

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📚 Learn More

Deposit Guide

Step-by-step guide to deposit ETH from L1 to L2

Withdrawal Guide

Complete guide to withdraw ETH from L2 to L1

Challenge Period

Understanding the 7-day security period

Bridge FAQ

Common questions and answers

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🔐 Security Tips

Only Use Official Bridge
  • ✅ Use: https://bridge.teqoin.io
  • ❌ Avoid: Third-party bridges (less secure)
  • ❌ Never: Send ETH directly to contract addresses
Always verify the URL before connecting your wallet!
Verify TransactionsAfter bridging:
  1. Check transaction on block explorer
  2. Verify contract addresses match official ones
  3. Confirm amounts are correct
  4. Save transaction hashes for records

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💬 Get Help

Discord Support

Ask questions in our community

Bridge FAQ

Common issues and solutions

Status Page

Check bridge operational status
Ready to bridge? Start with Deposit (L1 → L2) →