Stagepay

Stagepay is milestone escrow for freelance work, settled in stablecoins. Freelancers on marketplaces wait days for payouts and give up 10-20% in fees; paying them directly means someone has to trust someone. Stagepay fixes the order of trust with code.

How it works: the client calls createJob(freelancer, token, amounts[], deadlines[], reviewPeriod, termsHash), which pulls the whole job into escrow. The freelancer submits a milestone, which starts a review window. The client approves (pays that milestone) or requests a revision (max 3 per milestone). If the client says nothing before the window ends, the freelancer claims the payment. An unsubmitted milestone refunds to the client after its deadline. Either side can propose a split and the other accepts, so disputes settle without an arbiter. Only a hash of the agreement goes on chain; the app checks any text against it.

Stablecoins: works with any ERC-20; the Arbitrum Sepolia app offers Paxos USDG (0xFFC95faa3d63Cde504a05B567C600B78C0b41892) and Circle USDC. A freelancer paid in USDG gets a regulated dollar stablecoin directly, with no platform in between.

Security: no owner, no fee, no upgrade path. Deposits are checked by balance delta so a fee-on-transfer token can't under-fund a job; events are emitted before external transfers (checks-effects-interactions). 15 Foundry tests, including a 2,000-run fuzz test that every unit of funds ends up with the client or the freelancer.

Frontend: static web app (viem, no build step) served from GitHub Pages: create jobs, submit, approve, request revisions, claim, split, and verify agreement text.

The same contract is also live on Arc mainnet (Circle's L1), where a real job has been funded, approved and paid.

Built during the buildathon window (September 2026): the Stagepay contract, 15 Foundry tests with fuzzing, the static web app with multi-network support, and deployment to Arbitrum Sepolia (0x0A87039a127b600cF9B85d4C33d97c08054e15E6) with USDG and USDC token options. Also deployed to Arc mainnet with a real funded and paid job. Demo video: https://github.com/yangdongsuk/stagepay/releases/download/v0.1.0-demo/stagepay-demo.mp4

Not fundraising. Solo, self-funded project.