High-speed ETC charging method and device based on block chain and medium

The invention discloses a high-speed ETC charging method and device based on a block chain, and a medium. The method comprises the steps of determining the first information that a vehicle drives intoan expressway, and writing the first information into the block chain; determining the second information that the vehicle drives out of the expressway, and writing the second information into the block chain; and according to the expressway sections corresponding to the first information and the second information, calculating the passage fee of the vehicle through a smart contract of the blockchain, and writing the passage fee into the block chain. Aiming at the phenomena of disordered fee deduction and the like of the existing high-speed ETC, a high-speed ETC charging scheme based on theblock chain is designed by utilizing the characteristics of identity signature, unforgeability and the like of the block chain, and ETC equipment is written into the block chain after being identifiedand signed through a privat