USDT payments, smart contracts, tokens and full dApps on Ethereum, TON, Solana and other networks. Designed securely, tested and audited — before real money touches the contract.
Blockchain integration connects your site or service to decentralized networks: accepting and sending crypto payments, smart contracts that automate deals by predefined rules, tokens for loyalty programs, NFTs for access and digital rights.
The most common request is accepting USDT: it removes cross-border payment friction, works around the clock and skips bank fees. We implement it without custodial intermediaries: funds land directly in your wallet while the site automatically detects and confirms payment.
More complex tasks include tokenization, escrow deals, DAOs, NFT marketplaces and wallet integration (MetaMask, TON Wallet, WalletConnect). Security is critical here: a bug in a smart contract can't be patched. So every contract goes through tests, static analysis and an audit before mainnet deployment.
Customers abroad and payment-processing headaches — accepting USDT and other stablecoins solves it.
Tokens, DeFi mechanics, wallet-connected dApps — from MVP to an audited product.
Escrow contracts that release payment when conditions are met — no trusted middleman required.
NFT-gated access, token-based loyalty programs, digital certificates of authenticity.
Problem
“Crypto is complicated and risky”: it's unclear where to start and how not to lose money.
Our fix
We start with a consultation and design: pick the network, the scheme and the legal format. Non-custodial: funds stay in your wallets only.
Problem
Crypto payment processors take 1–3% and hold your funds.
Our fix
Your own integration with no intermediaries: direct payments, only network fees — cents for USDT on TON.
Problem
Fear of vulnerabilities: stories of contracts hacked for millions.
Our fix
Full test coverage, static analysis, audit and staged deployment: testnet → limited launch → mainnet.
Problem
Users don't understand Web3 interfaces and leave.
Our fix
UX like a regular website: one-click wallet connection, clear statuses, fiat options alongside.
09
We unpack the task, pick the network (Ethereum, Polygon, BNB, TON, Solana), tokenomics and architecture.
USDT / USDC and other tokens, address generation, transaction tracking, confirmation and order reconciliation.
Solidity / FunC / Rust: tokens (ERC-20, TON Jetton), NFTs (ERC-721 / 1155), escrow, vesting, staking.
Unit and integration tests, static analysis (Slither), fuzzing, security review, report.
Next.js + wagmi / viem or TON Connect: wallet connection, transaction signing, statuses, history.
Event indexers, webhooks, database, API for your site and CRM.
Crypto payment next to regular checkout, customer account, notifications, ERP / CRM reconciliation.
Testnet and mainnet, contract verification, transaction monitoring and alerts.
Technical documentation, team guides, wallet training.
Stack and tools
10
Total2–10 weeks
Goals, jurisdiction, choice of network and scheme. Architecture, tokenomics, risk assessment.
We write smart contracts on proven libraries and cover them with tests.
Static analysis, fuzzing, manual review. We fix findings and prepare a report.
dApp or payment module on the site, back end, event indexing, CRM.
Testnet → limited launch → mainnet. Monitoring and support.
from $3,000
2–3 weeks
Accept USDT and other tokens on your site with no intermediaries.
from $5,500
4–6 weeks
A token, NFT or escrow with an audit and an interface.
from $10,000
8–12 weeks
A full dApp, DeFi service or marketplace.
Network fees, external audit costs and legal counsel are billed separately. We give the exact estimate after the design stage.
| Criteria | Vectra (non-custodial) | Crypto processor (SaaS) | Manual to an exchange |
|---|---|---|---|
| Control of funds | Your wallets only | Held by the processor until withdrawal | On an exchange, freeze risk |
| Fees | Network only (cents on TON) | 0.5–3% + withdrawal | Exchange fees |
| Automation | Full: confirmation, orders, CRM | Through the vendor's API | Manual reconciliation |
| Customization | Any scenarios and contracts | Standard feature set | — |
| Risks | Code audit, monitoring | Dependence on the vendor and its jurisdiction | High |
From $3,000 for an integration without intermediaries: address generation, transaction tracking, payment confirmation, customer account and CRM link. Cost depends on the number of networks and how deeply it ties into your systems.
EVM networks (Ethereum, Polygon, BNB Chain, Arbitrum, Base), TON, Tron (for USDT TRC-20) and Solana. We pick the network for the task: for payments it's usually TON or Tron thanks to low fees.
Regulation of crypto payments differs by country and business model. We recommend confirming the scheme with a lawyer in your jurisdiction; we provide the technical description needed for that and design the flow to fit the agreed format.
We use proven libraries (OpenZeppelin, TON standards), cover contracts with tests, run static analysis and fuzzing, do manual review and staged deployment. For large sums we recommend an external audit — and help arrange it.
No. The interface works like a regular payment: a QR code or one-click wallet connection, clear statuses, hints. Fiat payment can stay right next to it.
Yes: audit the current code, fix vulnerabilities, migrate to a new version, build a new interface. We start with a review and a report on the project's state.
For payments we use stablecoins (USDT, USDC) pegged to the dollar — the rate doesn't move. For local-currency pricing we pull the current rate at the moment of payment.
Tell us about the scenario — we'll propose a network, an architecture and an estimate. Free consultation.
