Digital currency exchange method, device, equipment and medium

The embodiment of the invention discloses a digital currency exchange method and device, equipment and a medium. A trusteeship node receives digital currency uploaded by a user terminal; and selectinga token contract matched with the token type to which the digital currency belongs, and converting the digital currency into tokens according to the token contract. The alliance chain stores tokens corresponding to the user terminals transmitted by the hosting node; and when a transaction request transmitted by the user terminal is received, updating the token corresponding to each user terminalin the transaction request according to a rule matched with the transaction request. The digital currency corresponding to the user terminals is stored on the alliance chain in the form of tokens, andthe purpose that the user terminals execute the digital currency transaction is achieved by updating the tokens corresponding to the user terminals. The alliance chain records tokens of different user terminals, and cross-chai