Product

Tessera

USDT custody on Polygon, with HD wallets and a 4D tesseract in the interface.

The problem
A company receiving USDT from many customers needs one address per customer to know who paid what. Then it needs to move everything into a central wallet without storing private keys anywhere.
The solution
Each customer gets an address derived from a single seed (HD wallets, BIP-44). The database stores only the index and the address; the key is derived at signing time. Deposits are read from the chain and credited to a ledger, an automatic job moves the funds to the main wallet, and every withdrawal goes through a review screen before it is sent.
The outcome
Sign-up, deposits, transfers to the main wallet and withdrawals work on-chain. The system has already received real USDT on Polygon and has automated tests for the blockchain services and withdrawals.

Screens

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