5.4.4 PCN Gateway FISCO API

A PCN gateway is deployed on each public city node (PCN) to receive off-BSN system requests signed and verified by DApp access keys, then used to route the requests to the corresponding FISCO BCOS-based DApp smart contracts. Invoking the PCN gateway is realized by sending HTTP requests to each PCN gateway service. The gateway is responsible for verifying user and application identities, and then uses these identities and smart contract functions to process smart contract parameters then sends the smart contract transaction results back to the off-BSN systems.