StreamPay — Real-time USDC Streaming on Arc
StreamPay is a real-time USDC payment streaming protocol built natively on Arc. Instead of sending lump-sum payments, USDC flows continuously to recipients second by second. Features instant withdrawals, fair refunds on cancellation, and sub-second deterministic finality powered by Arc's infrastructure.
What is StreamPay?
StreamPay revolutionizes how payments are made by enabling continuous money streams. Instead of sending a one-time payment, a sender deposits USDC into a stream — and it flows continuously to the recipient, second by second, until the stream ends or is cancelled.
Why Arc?
Live Contracts (Arc Testnet)
StreamPay Contract
0x46937C3663101b3fE7F282A49F397d1f5C17a54B
View on ArcScan →USDC Contract
0x3600000000000000000000000000000000000000
View on ArcScan →Network Details
How It Works
StreamPay operates through four onchain actions that enable continuous payment flows:
1. Create Stream
2. Continuous Flow
3. Withdraw Anytime
4. Cancel for Refund
Technical Design
USDC Decimal Safety
StreamPay handles USDC's 6 decimal precision correctly, ensuring accurate rate calculations and preventing precision loss in streaming payments.
Rate Precision
The protocol uses high-precision rate calculations to ensure that per-second flows are accurate and predictable, even for very small payment amounts.
Withdrawable Calculation (View, No Gas)
Recipients can check their withdrawable balance at any time through a view function that requires no gas, enabling real-time balance tracking without transaction costs.
Use Cases
Freelancer Payments
- ▸Get paid continuously while working
- ▸Withdraw earnings as you go
- ▸No waiting for payment cycles
Salary Streaming
- ▸Continuous salary payments throughout the month
- ▸Instant access to earned wages
- ▸Transparent payment tracking
Service Subscriptions
- ▸Pay for services by the second
- ▸Stop payments instantly when service ends
- ▸Fair refunds for unused time
DAO Bounties
- ▸Stream payments for ongoing contributions
- ▸Adjust rates based on performance
- ▸Transparent treasury management
Quickstart
1. Add Arc Testnet to MetaMask
2. Install & Build
3. Deploy Contracts
4. Configure & Run Web UI
Web UI Features
- ▸Create and manage payment streams
- ▸Real-time balance tracking
- ▸Instant withdrawal interface
- ▸Stream cancellation with refund preview
- ▸CSV export for payment history
Built on Arc
StreamPay leverages Arc Network's unique capabilities to enable real-time payment streaming that's economically viable and user-friendly. Arc's stablecoin-native infrastructure and sub-second finality make it the perfect foundation for continuous payment protocols.
📚 Source Code
Built by dhozil for Arc Network Testnet 🚀