Bridging Crypto Between Networks

Different blockchains cannot natively talk to each other. A token on Ethereum cannot be used directly on Solana. A bridge solves this by connecting two networks so assets can move between them — but bridging carries unique risks worth understanding.

How a Bridge Works

When you bridge a token from chain A to chain B:

1. The bridge locks (or burns) your token on chain A.
2. It mints (or releases) an equivalent representation of that token on chain B.
3. When you bridge back, the process reverses — the chain B version is burned and the original is unlocked.

The bridged token on chain B is a "wrapped" or synthetic version that is only as good as the bridge that backs it.

Why Bridges Are Used

• To access applications on another blockchain.
• To trade tokens only available on a specific chain.
• To take advantage of lower fees on a Layer 2 or alternative network.

The Risks

• Smart contract risk: Bridges hold large amounts of locked value and have been among the most exploited targets in crypto. Major bridge hacks have caused billions in losses.
• Wrapped token risk: Your bridged token depends on the bridge staying solvent and functional. If the bridge fails, the wrapped token can become worthless.
• Time and fees: Bridging can take minutes to days and incur multiple fees.
• Liquidity: Some bridge routes have low liquidity or high slippage.

Safer Practices

• Use well-established, audited bridges.
• Bridge only what you need, not your entire holdings at once.
• Double-check destination network and address before confirming.
• Prefer native assets where possible — some chains have native versions of popular tokens that avoid bridging entirely.

A Simple Example

You want to use an app on Arbitrum but your ETH is on Ethereum mainnet. You bridge ETH to Arbitrum: the bridge locks your ETH on mainnet and mints equivalent ETH on Arbitrum. You can now use it there. Bridging back unlocks the original.

Continue Learning

• Layer 1 vs Layer 2 — The most common bridging path
• DEX vs CEX — Where bridged assets trade
• What Is Self Custody? — Custody during bridging

This article is for educational purposes only and is not financial advice.