SuiSend — Send money. It earns while they wait.

Every payment link you create automatically deposits into DeFi yield. Recipients claim your original amount — plus interest.

Built on Sui and Scallop Protocol. Deployed on mainnet.

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How it works

1. Create a link — Connect your Sui wallet, enter an amount. One transaction deposits your SUI into Scallop's lending pool and generates a shareable claim link.

2. It earns — While unclaimed, your funds compound at real Scallop APY (~8.2%). The yield counter ticks in real time.

3. They claim — Recipient opens the link, clicks claim. They receive the original amount + all interest accrued. A ClaimReceipt lands in their wallet as on-chain proof.

If unclaimed after 14 days, the sender gets everything back — principal + yield.

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Quick start

npm install
npm run dev

Open http://localhost:3000.

Command	Purpose
npm run dev	Development server (Turbopack)
npm run build	Production build
npm run start	Start production server

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Tech stack

Layer
Blockchain	Sui (mainnet)
Smart contracts	Sui Move (edition 2024.beta)
Yield	Scallop Protocol (sSUI lending pool)
Storage	Walrus (decentralized blob storage for notes)
Frontend	Next.js 16, Tailwind CSS, shadcn/ui
Wallet	@mysten/dapp-kit + @mysten/sui v2.17
zkLogin	Google OAuth (no wallet required)
Hosting	Vercel
Domain	suisend.xyz

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Smart contracts

Deployed on Sui mainnet at 0xbefdf372ed7b01a45561b71eb62ba2aed0370f7b79221d42ba1a14e8f75d6fe9.

Module	Lines	Purpose
core.move	848	Payment lifecycle: create, claim, refund. Shared PaymentBook singleton.
yield_scallop.move	178	Scallop adapter: mints sSUI on deposit, redeems on claim.
yield.move	286	Yield abstraction layer (mock + protocol routing).
walrus.move	44	Typed wrapper for Walrus blob IDs.
core_tests.move	433	5 test scenarios covering full lifecycle.

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Architecture

Frontend (Next.js) ── PTB ──▶ Sui Mainnet
                                  │
                            ┌─────┴─────┐
                            │  core.move  │
                            │  (Payment   │
                            │   Book)     │
                            └─────┬─────┘
                                  │
                    ┌─────────────┴─────────────┐
                    │  yield_scallop.move        │
                    │  (mint/redeem sSUI)        │
                    └─────────────┬─────────────┘
                                  │
                          Scallop Lending Pool
                               (8.2% APY)

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On-chain addresses

Name	Address
Package	0xbefdf372ed7b01a45561b71eb62ba2aed0370f7b79221d42ba1a14e8f75d6fe9
PaymentBook	0x4889941e6073c7e3bebc602c1a09ebc014c64a2b9137569a20100ece0219bafd
ScallopYieldVault	0x4ef1d47e179884387b70d780ae33ca4cc2f0d55d1cd13d17a5be772bf01f24cb
Scallop Version	0x07871c4b3c847a0f674510d4978d5cf6f960452795e8ff6f189fd2088a3f6ac7
Scallop Market	0xa757975255146dc9686aa823b7838b507f315d704f428cbadad2f4ea061939d9

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Roadmap

• Done — Payment links + Scallop yield on mainnet, wallet integration, zkLogin scaffolding
• Now — Email notifications, domain deployment
• Next — AI yield routing agent (multi-protocol), business dashboard
• Future — Mobile app, fiat on-ramp, recurring links, API/widgets

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License

MIT