flow-pie/chamaa.api

Integrate backend with smart contract

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#13 opened on Nov 1, 2025

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Description

Goal

Connect Node.js API endpoints to blockchain transactions.

Description

Modify existing endpoints (loans, savings, voting) to trigger smart contract calls.
Save blockchain transaction hash for each on-chain action.

Deliverables

  • Updated endpoints (/loans, /savings, /votes)
  • Returns transaction hash to frontend
  • Rollback logic for failed on-chain actions

Contributor guide

Research direction
Start by reviewing existing endpoints in the controllers to understand the current request/response flow. Then set up a Web3 library (e.g., ethers.js) to connect to the smart contract. For each endpoint, add logic to invoke the corresponding smart contract function and capture the transaction hash. Implement a rollback mechanism to revert changes if the on chain transaction fails. Test with a local blockchain like Ganache.
Tech stack
nodejsjavascript
Domain
backendapi
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Node.jsBlockchain basicsSmart contracts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60