Distributed ledger for retailing and issuing public transport tickets

摘要

A computer implemented method of transacting, retailing and issuing public transport tickets in a network comprising a distributed ledger, e.g. blockchain, comprises adding an administration contract to the distributed ledger. The administration contract, may employ smart contract functionality, and comprises, creating one or more flow contracts and assigning flow contracts to transport operators. The flow contracts are created as functions of origin and destination stations, transport mode, whether travel flow is reversible, and a transport operator. Separate contracts are provided to convert tickets stored in the distributed ledger into tickets in operator format. The flow contract maintains an internal dataset of pricing rules that are used to calculate fares. The method further comprises: signing data to the ticket, such as a barcode encrypted with the issuer private key; communicating the collection contract to an oracle to interface with an off-chain signing service; retaining sharing of private keys onto a public blockchain; passing a ticket payload and public address of the ticket to the oracle; signing the ticket payload with an off-chain private key and then the public key of the ticket owner; and adding the encrypted ticket payload to an owner’s wallet.