This chapter covered details about chaincode development such as the language section, development tools, and development environment setup. It detailed the full life cycle of chaincode, from development to updates, which included installation, initiation, testing, and versioning. It demonstrated the full chaincode with a code base built on Go and Node.js. It illustrated endorsement policies and private data collections and their functioning in concert with chaincode. It covered chaincode testing via shim and REST endpoints and integrating client apps with a business network using an SDK, REST, and events. Finally, it concluded with insights into chaincode, transactions, and channels by experimenting with the monitoring of a business via chaincode logs and channel logs.

This ledger of knowledge was created with the belief that, together, we will positively contribute to the evolution of blockchain technologies and continually inspire others to share their experience and further influence others to do so. Hence, the torch is with you, to continue influence by sharing, as sharing is caring, and together we contribute to creating a smarter world.