Book Image

Blockchain Development for Finance Projects

By : Ishan Roy
Book Image

Blockchain Development for Finance Projects

By: Ishan Roy

Overview of this book

Blockchain technology will continue to play an integral role in the banking and finance sector in the coming years. It will enable enterprises to build transparent and secure business processes. Experts estimate annual savings of up to 20 billion dollars from this technology. This book will help you build financial apps using blockchain, guiding you through enhancing popular products and services in the banking and finance sector. The book starts by explaining the essential concepts of blockchain, and the impact of blockchain technology on the BFSI sector. Next, you'll delve into re-designing existing banking processes and building new financial apps using blockchain. To accomplish this, you'll work through eight blockchain projects. By demonstrating the entire process, the book helps you understand everything from setting up the environment and building frontend portals to system integration and testing apps. You will gain hands-on experience with the Ethereum, Hyperledger Fabric, and Stellar to develop private and public decentralized apps. Finally, you'll learn how to use ancillary platforms and frameworks such as IPFS, Truffle OpenZeppelin, and MetaMask. By the end of this blockchain book, you'll have an in-depth understanding of how to leverage distributed ledgers and smart contracts for financial use cases.
Table of Contents (17 chapters)
Section 1: Blockchain Payments and Remittances
Section 2: Blockchain Workflows Using Smart Contracts
Section 3: Securing Digital Documents and Files Using Blockchain
Section 4: Decentralized Trading Exchanges Using Blockchain
Appendix: Application Checklist

Writing and deploying the DocsApp chaincode

Now that our network is online, the next step we need to do is write and deploy our chaincode contract. The chaincode DocsApp consists of the following methods:

  • addDocHash: This method adds a new document hash to the blockchain. Document hashes are indexed by the hash of the file path.
  • addParamHash: This method adds the FTH and the MTH to the blockchain indexed by a timestamp. The timestamp indicates the time at which the FTH and MTH were calculated and stored to the blockchain.
  • queryDocHash: This method retrieves the last updated hash for a document using the hash of the file path.
  • queryParamHash: This method retrieves the FTH and the MTH stored in the blockchain at a particular time using the timestamp indicating the time that it was stored.

We'll also have to install the chaincode for all the nodes that are part of our network...