Acknowledgments Shailesh would like to acknowledge and thank Verma V.S.S.R.K for their valuable inputs and review comments. Shailesh would also like to recognize and thank Dr. P. V. Suresh for his constant encouragement and immense support. Sourabhh would like to thank his parents (Ritu Sethi and Sat Dev Sethi) and brother (Shrey Sethi), who were the guiding light behind him. The authors also like to immensely thank Mr. George Koelsch for his technical review; his feedback has added great value to the book. The authors want to sincerely acknowledge and thank profusely the Infosys team that includes the managers Jitin Singla, Saumitra Bhatnagar, Vivek Rastogi, Sarweshwar Panda, Sumit Arora, Aditya Kumar Soni, our colleagues and our friends who have facilitated us in accomplishing this task. Special thanks to Rahul Krishan for precious guidance and support. The authors would also like to convey sincere thanks to our mentor and friend Jasleen Khokhar, who read the manuscript at different stages as it evolved from shoot to bud, from flower to fruit. The authors would like to extend thanks to Anchit Madaan (Blockchain Core Team), Deepak Garg, Himanshu Arora, Jaskirat Singh, Babu Krishna Murthy, Kiran Korke, Nishant Satija (Digital Experience Team), and Arpit Kulshrestha. Our special thanks to Shivangi Ramachandran, Rita Fernando, and the editors, technical team, designers, and publishing team at Apress for providing all necessary and timely support in terms of review, guidance, and regular follow-ups. xxi