Send USDT to anyone via wallet address or phone number, with fees under 1%. Powered by Uniswap v4 hooks for trustless escrow, on-chain compliance, and group contributions—on Base & Unichain.
How it works
From creating a remittance to the recipient claiming funds—simple, transparent, and on-chain.
Set a target amount, recipient wallet or phone number, and optional expiry. The smart contract creates a secure escrow on Base.
Contribute USDT directly or via Uniswap v4 swaps—the hook captures a portion of each swap output automatically. Multiple people can pool funds toward a single remittance.
When the target amount is reached, funds are automatically released to the recipient—minus a tiny 0.5% fee. No middleman needed.
The recipient can also manually release once the target is met, or claim refunds if the remittance expires. Full control, full transparency.
Features
Built for the real needs of cross-border payments: group funding, compliance, phone-based sends, and more.
Multiple family members or friends pool funds into a single remittance. Perfect for collective support like tuition, medical bills, or community projects.
Send to a phone number instead of a wallet address. Privacy-preserving on-chain resolver maps hashed phone numbers to wallets.
Pluggable compliance modules. Phase 1 uses KYC-based allowlists with daily limits. Phase 2 adds Worldcoin World ID biometric verification.
Smart contract escrow with configurable auto-release. Funds are released automatically when target is met, or manually by the recipient.
Set optional deadlines. If the target isn't met by expiry, contributors can claim full refunds. Creators can cancel anytime.
Sub-cent gas fees on Coinbase's Base L2. Settlement in ~2 seconds. Ethereum security with L2 efficiency and Uniswap v4 liquidity.
Why AstraSend
The average global remittance fee is 6.2%. We bring it below 1% with faster settlement and full transparency.
Technology
beforeSwap/beforeAddLiquidity compliance gates and afterSwap contribution capture. The hook intercepts swaps to fund remittance escrows and enforces daily limits.
Sub-cent gas fees with Ethereum-grade security. ~2s finality on Coinbase's flagship L2.
200ms Flashblocks for near-instant settlement. TEE-secured block building ensures senders get the price they expect.
Stablecoin-denominated transfers eliminate FX risk during transit.
Biometric proof-of-personhood via zero-knowledge proofs. Sybil-resistant.
FAQ
Currently AstraSend supports USDT (Tether) as the primary corridor token. This provides stability during transit, eliminating FX risk between send and receive.
When you create a remittance, anyone can contribute to it. Share the remittance link with family or friends, and they can contribute USDT directly. All contributions are tracked on-chain with full transparency.
If a remittance has an expiry date and the target isn't met in time, contributors can claim full refunds. The creator can also cancel at any time to trigger refunds.
AstraSend uses pluggable compliance modules. Phase 1 uses a KYC-based allowlist with configurable daily limits (default 10,000 USDT). Phase 2 adds Worldcoin World ID for biometric proof-of-personhood via zero-knowledge proofs.
The platform fee is 0.5% of the remittance amount, deducted at release. There are no hidden fees, no FX markups, and no wire transfer charges. Gas fees on Base L2 are typically under $0.01.
The smart contracts include comprehensive test coverage with 229 passing tests (unit, integration, invariant, and fuzz tests). A formal audit is planned before mainnet deployment.
Connect your wallet, create a remittance, and experience cross-border payments that are fast, cheap, and transparent.
Currently live on Base Sepolia testnet. Mainnet launch coming soon.