Bridge to Mantle

Gas is paid in MNT

Mantle uses MNT rather than ETH as its gas token, and a transaction pays three things in it: execution on Mantle, the cost of publishing data to Ethereum, and an operator fee (Mantle documentation). This is the detail that strands people. Habits from other Ethereum layer 2s say “keep a little ETH”, and on Mantle ETH does not pay for anything. Arrive with USDC and nothing else, and the USDC stays where it landed until some MNT arrives beside it.

The withdrawal wait has already changed once

Leaving for Ethereum through the official bridge takes three steps: start the withdrawal, prove it, then claim it on Ethereum. Mantle’s bridge guide walks through them on the testnet bridge and states that the mainnet bridge works in exactly the same way (Mantle documentation). The waiting period between them is not fixed by nature. Mantle moved to zero-knowledge validity proofs and cut the period sharply, keeping part of it deliberately as a safety buffer for the bridge (Mantle documentation). A parameter the team has changed before can change again, so we do not quote a figure here; the bridge shows the current one when you start.

How many sources answered

Support for Mantle is decided by each provider and differs by token and by the network you start from. The Quote sources column shows how many answered for your route, and a route with fewer than two confirmed sources is not presented as a comparison. Where an exchange we track lists Mantle for the token, its published withdrawal fee sits beside the bridges; where none does, there is no exchange row.