Скачать или смотреть Hyperledger Fabric Chaincode Writing | Fund, Token & Donation Logic (Full Walkthrough) - Chapter 11

we write complete, production-ready chaincode (smart contracts) for the Blockchain Powered Donation Tracking System on Hyperledger Fabric.

This video covers:
✔ Fund Smart Contract
✔ Donation Logic
✔ Token Issuance, Transfer & Redeem
✔ Expense Tracking
✔ Vendor & Bank Flows
✔ Complete Ledger Mapping
✔ Real-World Private Blockchain Use Case

📌 Check description for GitHub Repository
📌 Playlist: Hyperledger Fabric – Donation Tracking System

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Google Doc: https://docs.google.com/document/d/1K...

Github Repo: https://github.com/akshaykurhekar/blo...


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❤️❤️Timeline - Topic Covered 🚀❤️
0:00 - Intro
00:45 – Moving to Fund Smart Contract

Explaining NGO role, donor flow, and fund creation lifecycle.

01:10 – Importing APIs & Utils

Setting up Fabric Contract API and util functions.

02:32 – Token Contract Base Structure

Creating class, constructor, and export structure.

02:55 – Reference to README Functions

Overview of required fund contract functions.

03:30 – Create Fund Logic

Parameters, validation, role-based access, and ledger object.

04:43 – Fund Object Breakdown

Understanding fundID, NGOID, donations, expenses, tokens & status.

06:00 – Why We Use Tokens

Mapping real money to tokens for traceability & bank involvement.

07:04 – Inflow & Outflow Tracking

Managing donations, vendor payouts, and total token maintenance.

09:29 – Bank & Vendor Use Case

Explaining real-world relevance of token issuance & redemption.

11:43 – Donation Function Logic

Full donation flow: issue token → transfer token → donation record update.

12:39 – Correct Contract Structure

Switching logic into correct fund contract.

13:30 – Donation Metadata

Donor ID, token ID, CID (IPFS hash), amount & timestamps.

14:45 – Updating Fund State

Ledger update process, versioning & transaction history.

17:08 – Add Expense Logic

Vendor payment flow, spending tokens, and updating fund totals.

18:40 – Get Fund by ID

Fetching full fund details; optional trimming of sensitive fields.

19:29 – Close Fund Function

Manually or auto-closing funds once targets are reached.

21:43 – Get All Funds by NGO

Returns all funds created by a specific NGO.

22:05 – Get All Funds (Platform Level)

Returns all fund entries across the entire network.

24:04 – Get All Donations by Donor

Fetching donation history mapped across all funds.

26:27 – Parsing Donation Arrays

Filtering nested arrays to create unified donor history.

27:30 – Start of Token Smart Contract

Switching to token logic: issuance & transfer.

28:53 – Issue Token Logic

Bank-issued tokens with metadata & MSP identity.

30:15 – Transfer Token Logic

Ownership transfer from donor to fund creator.

31:06 – Redeem Token Logic

Token burn process for withdrawing real money.

33:16 – Get Tokens by Bank ID

Querying token entries belonging to a specific bank.

33:40 – Summary & Next Steps

Chaincode logic complete; next chapter covers deployment & testing.


Playlists ❤️🔔:

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   • Плейлист  


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