# Bridges are three products, and only one of them is canonical

URL: https://www.caijing188.com/three-kinds-of-bridges/
Published: 2026-10-25T21:09:39+08:00 | Updated: 2026-10-27T22:09:49+08:00
Verified: 2026-10-27

## Quick answer
Three products share the word bridge: the rollup's canonical bridge, a third-party liquidity network, and a wrapped-asset issuer. Each holds keys differently and pays you differently. Ethereum.org listed, as of October 2026, 7-day canonical exits on Base and OP Mainnet and a 45,818-block window on Arbitrum. Ask what claim you hold before you move size.

## Summary
A canonical rollup bridge gives you a native claim enforced by the rollup's own contracts, and it costs you the exit window. A third-party liquidity network gives you a transfer paid from a pool, which is fast because the pool absorbs the wait. A wrapped-asset issuer gives you an IOU redeemable through that issuer. Ethereum.org's October 2026 listing puts canonical exits at 7 days on Base and OP Mainnet and about 6.4 days on Arbitrum, while FeeEdge's 17 August 2026 survey puts L1 ERC-20 withdrawals at $2 to $10, so match the product to the claim you can afford to hold.

## Key takeaways
- Ethereum.org's October 2026 directory puts canonical exits at 7 days on Base and OP Mainnet
- Arbitrum's canonical window is 45,818 blocks, about 6.4 days, in the same listing
- FeeEdge's 17 August 2026 survey priced L1 ERC-20 withdrawals at $2 to $10, above $50 under congestion
- A fast route is fast because someone else is holding the wait, and that someone is a counterparty

## FAQ
Q: Is the bridge my wallet suggests the official one?
A: Wallets rank routes by convenience and by commercial arrangement, not by claim quality. The canonical bridge is the rollup's own contract, while a liquidity network is a separate business that fronts the transfer. Both produce a balance that looks identical, and only one is enforceable against the rollup without a counterparty.
Q: What do I actually receive from a third-party bridge?
A: A transfer on the destination chain paid out of the network's own pool. The pool holds inventory on both sides, so it can pay you before the canonical message settles. You receive the native asset, but your safety depends on the pool being solvent and on its contracts behaving, which is a different question from whether the rollup is valid.
Q: How long should a canonical withdrawal take?
A: Long enough to clear the rollup's own settlement rule. Ethereum.org's October 2026 listing shows 7 days for Base and OP Mainnet, 45,818 blocks, about 6.4 days, for Arbitrum, and a 3-hour minimum for ZKsync Era. A route quoting minutes is not the canonical bridge, whatever its interface says.