Yes, there is a bridge between Ethereum and Tron, and it is provided by bt.io. This bridge allows users to transfer USDD tokens between the two blockchains. The process is simple and secure, and the tokens can be transferred and exchanged quickly and easily. In order to bridge the tokens, users need to have an account with bt.io and have both Ethereum and Tron wallets set up and linked to the account. Once this is done, users can initiate the bridging process, which will securely move the USDD tokens from one blockchain to the other. This bridge is a great way for users to easily move their tokens between the two blockchains and take advantage of the different features and opportunities that each one offers.