IOPN Greeter contract
A simple smart contract that stores and update a greeting name on-chain
by fatthur · submitted May 29, 2026
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Description
01/03
What the builder said.
Written by the team, rendered as the markdown they typed in the submission wizard.
What We Built
I built a simple smart contract called Greeter on OPN Chain Testnet using Solidity.
The contract allows a user to store a name during deployment and retrieve a greeting message from the blockchain. The contract owner can update the stored name through an owner-restricted function, while all users can read the current value and greeting message.
Why
This project demonstrates the fundamentals of smart contract development and deployment on OPN Chain. It showcases on-chain data storage, ownership management, event logging, and interaction with deployed contracts.
How It Works
- Deploy the Greeter smart contract with an initial name.
- The contract stores the name on-chain.
- The owner can update the name using the changeName function.
- The greet function returns a greeting message based on the current stored name.
- Every update emits an event that can be tracked on-chain.
Technologies Used
- Solidity 0.8.22
- Remix IDE
- MetaMask
- OPN Chain Testnet
Smart Contract Features
- On-chain data storage
- Owner-restricted updates
- Event emission
- Public read functions
- EVM-compatible deployment
Roadmap
02/03
What ships next.
The builder's own next-quarter plan. Use it to gauge follow-through and ambition.
Roadmap
Phase 1
- Deploy Greeter smart contract on OPN Chain Testnet.
- Verify contract deployment and source code.
- Publish project repository on GitHub.
Phase 2
- Test contract functionality and event logging.
- Improve contract documentation.
- Gather feedback from the community.
Phase 3
- Explore additional smart contract features.
- Build more projects on OPN Chain.
- Continue learning blockchain development.
On-chain proof
03/03
1 contract on OPN Chain.
The chain itself confirmed every deployment is valid, signed by the builder's wallet, and inside the season's window.