基于区块链的供应链金融平台

使用FISCO BCOS

For English Introduction, please see the last part: English Introduction

• 基于区块链的供应链金融平台
  • 一、依赖环境
    • 1. 链端与后端
    • 2. 前端
  • 二、文件说明
  • 三、运行
  • 四、补充
  • English Introduction

一、依赖环境

1. 链端与后端

• Ubuntu 18.04
• FISCO BCOS v2.1.0
• Python 3.6.3+
• FISCO BCOS Python SDK
• Flask 1.1

2. 前端

• MacOS
• Xcode

二、文件说明

• 链端：Loan.sol 合约中实现完整供应链金融平台逻辑
• 后端：python-sdk/Loan_contract_invoke.py实现对Loan合约调用的封装；python-sdk/Loan_contract_flask_backend.py运行服务端，接受外部请求并返回JSON数据
• 前端：Loan_UI中是一个完整的iOSApp工程

三、运行

Ubuntu配置好依赖环境后，将 Loan.sol 部署到节点上，若成功部署，会得到 合约地址。你可以先在控制台中调用合约，产生一些实例以及发送交易。

用得到的合约地址替换 python-sdk/Loan_contract_flask_backend.py，Line 9 中的地址，将语句改为：

loan_contract = Loan_Contract(address=your_new_address)

注意保留双引号

假设在你的Ubuntu中，FISCO BCOS Python SDK路径为 $FB-Python-SDK。
将 Loan.sol 复制到你的 $FB-Python-SDK/contracts 中；
将 python-sdk/Loan_contract_invoke.py 和 python-sdk/Loan_contract_flask_backend.py 复制到你的 $FB-Python-SDK 中

此时运行 Loan_contract_flask_backend.py，服务端会在8383端口监听请求。
请求示例：

• 获取名称为A的公司的信息

GET: {IP}:8383/get_company_inf/?cpName=A

• 获取所有公司A参与交易的单据

GET: {IP}:8383/get_receipt/?cpName=A

• 获取银行bank_1向公司A提供的信用资产的数额

GET: {IP}:8383/get_AmountOfCreditAsset_bank_GiveTo_TrustedCompany/?bName=bank_1&cpName=A

在MacOS中打开 Loan_UI/Loan_UI.xcworkspace，在Xcode点击运行按钮即可使用前端界面。
注意修改 Loan_UI/Loan_UI/SearchCompanyPage/SearchCompanyViewController.m，Loan_UI/Loan_UI/SearchReceiptPage/SearchReceiptViewController.m 和 Loan_UI/Loan_UI/SearchCreditAssetPage 里的URL

四、补充

背景介绍、方案设计和功能测试等详见 17343107_王明业.pdf。
Demo见本目录下的.mp4视频。

English Introduction

Project Overview:

Develop a comprehensive platform encompassing the front end, back end, and blockchain layer using the consortium blockchain platform FISCO-BCOS, maintained by Tencent.

Scenario:

We have three companies: A, B, and C.

• Company A: A large enterprise with excellent credit, substantial risk-bearing capacity, and the ability to secure significant financing from banks and other financial institutions.
• Company B: A smaller company unable to directly secure large financing from financial institutions.
• Company C: Another small company in a similar financial position as Company B.

Process:

1. Initial Order: Company A places an order with Company B for a batch of goods.
2. Supplementary Order: To fulfill this order, Company B needs to procure raw materials from Company C.
3. Funding Shortfall: Company A currently lacks sufficient funds but issues a promissory note to Company B, guaranteeing payment for the goods.
4. Bank Loan: Company B, leveraging Company A's strong credit, uses this promissory note to secure a loan from a bank.
5. Cascading Credit: Similarly, Company B issues a promissory note to Company C, enabling Company C to obtain a loan from the bank.

Challenges with Traditional Methods:

This traditional process is cumbersome, involving extensive authorization and verification steps.

Solution:

Our project leverages blockchain technology to streamline this credit transfer process. By implementing a blockchain-based supply chain financial platform, we aim to:

• Increase Efficiency: Automate and expedite the authorization and verification process.
• Enhance Transparency: Provide a tamper-proof ledger of all transactions, ensuring trust among all parties.
• Improve Accessibility: Enable smaller companies to access financing using the creditworthiness of larger companies.

By utilizing the FISCO-BCOS platform, we will create a secure, transparent, and efficient supply chain financing solution.