OPN Builder Proof Log
A simple on-chain proof log for builders to record milestones and showcase verified progress on OPN Chain.
by herozen7979 · submitted May 30, 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
OPN Builder Proof Log is a lightweight on-chain proof system for builders on OPN Chain. It lets a builder record milestones, shipped work, and technical progress directly through smart contract transactions.
Each milestone is linked to the builder wallet address, stored on-chain, and can be checked through the deployed contract and OPN Testnet explorer.
Why
Builder ecosystems need more than claims or screenshots. They need simple, verifiable proof that a builder actually deployed, tested, and interacted with on-chain infrastructure.
This project follows the same idea as the OPN Builder’s Dashboard: shipped work should be visible, trackable, and verifiable.
How it works
- The builder deploys the smart contract on OPN Testnet.
- The builder submits a milestone using the
submitMilestonefunction. - The contract stores the milestone title, description, wallet address, and timestamp.
- The contract emits a
MilestoneSubmittedevent. - Anyone can read milestone data from the contract through
getMilestone,getMyMilestoneIds, orgetBuilderMilestoneIds.
OPN Chain integration
The contract is deployed on OPN Testnet and uses OPN Chain as the verification layer for builder activity. The deployed contract has already been interacted with through an on-chain milestone transaction.
Current MVP
The current version includes:
- On-chain milestone submission
- Builder wallet tracking
- Milestone title and description storage
- Timestamped proof records
- Event emission for submitted milestones
- Public contract source for reviewer inspection
Use case
This can become a simple proof-of-work log for OPN builders. Builders could use it to record deployments, testnet activity, completed learning tasks, shipped frontend updates, or other verifiable ecosystem contributions.
Roadmap
02/03
What ships next.
The builder's own next-quarter plan. Use it to gauge follow-through and ambition.
Q1 - Current MVP
- Deploy the first version of OPN Builder Proof Log on OPN Testnet.
- Submit the first builder milestone through the smart contract.
- Make the source code public on GitHub for reviewer inspection.
- Use the deployed contract as a simple proof layer for builder activity.
Q2 - Frontend and builder experience
- Build a simple frontend where builders can connect their wallet.
- Allow builders to submit milestones without using Remix.
- Display each builder’s milestone history by wallet address.
- Add links to OPN Testnet explorer for each submitted milestone.
Q3 - Reputation and credential layer
- Add milestone categories such as Deployment, Testing, Documentation, Frontend, and Ecosystem Contribution.
- Add simple badge-style records for completed builder actions.
- Improve public builder profiles with on-chain proof history.
- Explore integration with IOPn ecosystem credentials.
Beyond
- Expand the project into a lightweight reputation layer for OPN builders.
- Support multiple contracts and project types.
- Add community verification or endorsement features.
- Make builder progress portable across the broader IOPn ecosystem.
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.