Hands-On Blockchain with Hyperledger

Application model and architecture

The process of writing a Fabric application begins with chaincode, but ultimately the developer must make judicious decisions about how an end user or a software agent must interface with that chaincode. How the assets of the chaincode, and the operations of the blockchain network running that chaincode, ought to be exposed to the user is a question that ought to be dealt with carefully. Significant damage is possible if these capabilities are exposed without restriction, especially the ones involving blockchain bootstrapping and configurations. Proper operation of the chaincode itself relies not just on its internal logic, but suitable access controls being built above it. As we saw in the previous section, ...