To bridge SURGE from Hive-Engine (HE) to Base, send your SURGE tokens to the @surge.oracle account on Hive-Engine, including your Base EVM wallet address as the memo. This triggers the cross-chain oracle to wrap heSURGE into SURGE on Base (2% fee applies).
You'll receive the SURGE on Base shortly after. For the reverse (Base to HE), interact directly with the contract on Basescan using the "ConvertTokenWithTransfer" function at https://basescan.org/address/0x7234b7e90a64f397047faf9ae8b1903b4467c275#writeContract.
Details from official post: New Feature for SURGE Holders (Nov 15, 2025).