According to PolkaBridge announcement, PolkaBridge (PBR) will be migrated to a new smart contract and existing PBR tokens will be swapped for the new token. Gate.io will support the PBR token swap and contract migration. If your PBR tokens are on Gate.io, you do not need to do anything in particular.
Gate.io migration start time: March 20, 2021. Deposits and withdrawals will be enabled when we complete the token swap and migration.
Gate.io is an established exchange that holds integrity, transparency,
and fairness to a very high standard. We charge zero listing fees and
only choose quality and promising projects. Our exchange consists only
of 100% real trading volume. Thanks to everyone who has joined us in our
journey. We always intend to improve and innovate to reward our users
for their continuous support.