Sub-Second Finality
Arc delivers deterministic finality in under 1 second. Your gift settles before the moment passes.
Once created, share your gift via:
Connect your wallet to see your gift vaults
Create time-locked USDC vaults that unlock exactly when you choose. Birthdays, graduations, weddings. Built on Arc.
When you want to give money for a future moment, your options fall short. Families deserve something better.
Arrive immediately. No way to time delivery for a birthday or graduation.
Gets spent instantly. No programmability, no personal message attached.
Expire, carry fees, and are locked to one retailer. Not programmable.
Not programmable. Cannot schedule unlocks or attach a personal story.
Four steps. Seconds on Arc. No middlemen.
Link MetaMask or any Web3 wallet. Switch to any supported chain in one click.
Birthday, Milestone, Holiday, Family, or Memory. Add a personal e-card.
Enter amount and unlock date. USDC is locked onchain. No intermediary controls it.
Share via WhatsApp, Telegram, or SMS. The recipient claims when it unlocks.
No wallet needed. No signup. Just fill in the fields and see what happens.
This is a preview only. No transaction is created. Connect your wallet to create a real vault.
Lock USDC with a personal message. Schedule delivery for the exact right moment.
Dinner, rent, trips. Settle in USDC on any chain in under a second on Arc.
Type the total in USDC. Stable value, no price guessing.
Paste wallet addresses. Equal or custom split.
Everyone paid instantly. Arc settles in under a second.
Bulk gifting, branded campaigns, employee rewards. Settle onchain.
Upload recipients via CSV/XLSX. Send hundreds of gifts in one transaction.
Your logo, your colors, your messaging on every gift card.
Schedule gifts for holidays, performance cycles, or company milestones.
Set spending limits per department, campaign, or recipient.
Multi-step approval chains. Compliance-ready for enterprise procurement.
Connect GrandPay Vault to your HRMS, CRM, or loyalty platform via REST API.
Arc is Circle's open Layer-1 blockchain, purpose-built for programmable money and stablecoin-native finance.
Arc delivers deterministic finality in under 1 second. Your gift settles before the moment passes.
No volatile native token for fees. Arc uses USDC, so you always know what you are paying.
Full Solidity support. Deploy with Remix, Hardhat, or Foundry. Standard tooling, new infrastructure.
Integrated with Circle's full-stack platform including USDC, CCTP, Gateway, and developer services. See arc.io.
We only claim what we can demonstrate. Here is what is actually true about GrandPay Vault.
GrandPay Vault never holds your funds. USDC is locked in a smart contract. Only the designated recipient can withdraw after the unlock date.
All smart contract code is publicly available on GitHub. Review, audit, and verify the implementation yourself.
GrandPay Vault is currently deployed on Arc Testnet. This is not a production application. Do not use real funds.
The smart contracts have not been formally audited by a third-party security firm. Use at your own risk during the testnet phase.
Builder and founder of GrandPay Vault. Built because families deserve a better way to give programmable money to the people they love.
Time-locked USDC vaults with personal e-cards and media attachments.
MetaMask integration with multi-chain support (6 chains).
Equal and custom bill splitting with USDC across wallets.
Smart contracts deployed and live on Arc Testnet.
Responsive mobile app experience with push notifications.
Automated weekly, monthly, or yearly gift scheduling.
Multi-user family dashboards with shared gift management.
Production deployment when Arc mainnet is available.
GrandPay Vault lets you create time-locked USDC vaults as programmable gifts. Lock USDC with a personal message, set an unlock date, and share the gift. The recipient can claim the funds after the unlock date. Built on Arc, Circle's Layer-1 blockchain.
Arc is Circle's open Layer-1 blockchain designed for programmable money. It offers sub-second finality and uses USDC for gas fees. Arc is currently in public testnet. See arc.io for the latest on mainnet timing and ecosystem partners.
GrandPay Vault is currently deployed on Arc Testnet. This is a testnet application, not a production product. Do not send real funds. A mainnet deployment is planned when Arc mainnet launches.
MetaMask is the primary supported wallet. Any Web3 wallet that supports custom EVM chains can be used. You will need to add Arc Testnet to your wallet manually or it will be added automatically when you connect.
No. GrandPay Vault is non-custodial. Your USDC is locked in a smart contract onchain. Only the designated recipient can withdraw after the unlock date. The platform never takes custody of your funds.
Arc Testnet (primary), Ethereum, Base, Polygon, Arbitrum, and Optimism. Smart contracts are currently deployed only on Arc Testnet. Other chains are planned for future deployment.
Yes. The smart contract code and frontend are publicly available on GitHub. You can review, fork, and verify the implementation.
GrandPay Vault does not charge platform fees during the testnet phase. You will pay standard Arc Testnet gas fees (in USDC) when creating vaults or splitting bills. Get testnet USDC from the Arc faucet.
Once a vault is created onchain, it cannot be cancelled or modified. The USDC is locked until the unlock date. Make sure you have entered the correct recipient address and amount before confirming the transaction.