DAAP: blockchain token payments

Context: Industry capstone, Master of IT, RMIT
Team: Team project for an industry client
When: 2025
Discipline: Software

Added a DAX token payment system to an existing AWS-hosted digital asset authentication platform, alongside its Stripe payments.

Digital asset verification for audit firms and self-managed super funds is manual, costly and slow. The client's existing platform ran on AWS and took payments through Stripe. This proof of concept added a blockchain-native payment path using the DAX token.

Tokens are minted in bulk into a warehouse wallet and distributed to users on validation triggers set by the reward model. A burn mechanism in the smart contract supports long-term value stability.

What I did

Implemented the DAX token workflow across Base Chain smart contracts with Thirdweb, with MetaMask handling wallet authentication.
Built the React user and admin interfaces for payment processing, wallet balances, transaction history and discount management.
Worked over an AWS Amplify, Lambda, DynamoDB and S3 backend supporting minting, burning and reward logic.
Delivered in agile sprints with functional testing throughout.

Key decisions

Question:
Which chain should carry the token?
Decision:
Base Chain with Thirdweb, chosen after a technical and cost analysis for low fees, scalability and smart-contract tooling.
Question:
Where should volume discounts and early-bird offers live?
Decision:
In the application backend rather than the contract, so the client can change them without redeploying.
Question:
How do users get tokens without managing supply by hand?
Decision:
Bulk-mint into a warehouse wallet and distribute automatically when validation triggers fire.