USDT CRYPTOCURRENCY API DOCUMENTATION

Environment Configuration

Environment	Protocol	MediaType	Base URL
SandBox	https	application/json	https://sandbox-gateway.smilepayz.com
Production	https	application/json	https://gateway.smilepayz.com

API Overview

Tether (USDT) represents a leading stablecoin in the cryptocurrency ecosystem, designed to maintain a 1:1 peg with the US Dollar. Our comprehensive API solutions provide secure, efficient, and reliable cryptocurrency transaction processing capabilities for businesses operating in the digital asset space.

Core Functionalities

• Transaction Processing: Facilitates secure USDT transfers between wallets with real-time transaction monitoring and status updates

• Multi-Network Support: Comprehensive support for major blockchain networks including ERC20 (Ethereum), BEP20 (Binance Smart Chain), TRC20 (TRON), and OMNI

• Wallet Management: Advanced digital wallet creation, management, and monitoring capabilities with comprehensive balance tracking and transaction history

• Exchange Rate Integration: Real-time USDT exchange rates against major fiat currencies and cryptocurrencies for seamless conversion operations

• Security Framework: Enterprise-grade security features including wallet encryption, multi-factor authentication (MFA), transaction signing, and comprehensive audit trails

USDT Market Characteristics

• Stability: 1:1 peg with US Dollar ensuring price stability
• Global Accessibility: Available 24/7 for cross-border transactions
• Network Diversity: Support for multiple blockchain networks
• Regulatory Compliance: Adherence to international cryptocurrency regulations
• Liquidity: High market liquidity enabling large transaction volumes

Development Resources

GitHub Repositories

java demo

• PayInRequestDemo.java - USDT pay-in transaction implementation
• PayoutRequestDemo.java - USDT pay-out transaction implementation
• InquiryBalanceDemo.java - Wallet balance inquiry implementation
• InquiryOrderStatusDemo.java - Transaction status inquiry implementation
• SignatureUtils.java - Cryptographic signature generation and verification utilities

python demo

• pay_in_request_demo.py - USDT pay-in transaction implementation
• pay_out_request_demo.py - USDT pay-out transaction implementation
• balance_inquiry.py - Wallet balance inquiry implementation
• status_inquiry.py - Transaction status inquiry implementation
• Tool_Sign.py - Cryptographic signature generation and verification utilities

node.js demo

• pay_in_request_demo.js - USDT pay-in transaction implementation
• pay_out_request_demo.js - USDT pay-out transaction implementation
• inquiry_balance_demo.js - Wallet balance inquiry implementation
• inquiry_order_status.js - Transaction status inquiry implementation
• SignatureUtils.js - Cryptographic signature generation and verification utilities

php demo

• PayInRequestDemo.php - USDT pay-in transaction implementation
• PayoutRequestDemo.php - USDT pay-out transaction implementation
• InquiryBalanceDemo.php - Wallet balance inquiry implementation
• InquiryOrderStatusDemo.php - Transaction status inquiry implementation
• Signature.php - Cryptographic signature generation and verification utilities

c# demo

• PayInRequestDemo.cs - USDT pay-in transaction implementation
• PayOutRequestDemo.cs - USDT pay-out transaction implementation
• BalanceInquiryDemo.cs - Wallet balance inquiry implementation
• OrderStatusInquiryDemo.cs - Transaction status inquiry implementation
• SignatureUtils.cs - Cryptographic signature generation and verification utilities

golang demo

• PayInRequestDemoV2.go - USDT pay-in transaction implementation
• PayoutRequestDemoV2.go - USDT pay-out transaction implementation
• BalanceInquiryDemoV2.go - Wallet balance inquiry implementation
• OrderStatusInquiryDemoV2.go - Transaction status inquiry implementation
• SignatureUtils.go - Cryptographic signature generation and verification utilities

The current document version is above 1.0.5 (including 1.0.5). Please download 1.0.5 and install it before payment

• Download Plugin V1.0.5

Installation Guide

• Plugin Discovery: Search for the plugin in the WordPress plugin directory and click "Install Now"

• Manual Installation: Upload the plugin file through WordPress admin panel

• Activation: Activate the plugin after successful installation

• Configuration: Configure merchant credentials and payment settings

Configuration Steps

• Step 1: Configure MerchantID and MerchantSecret credentials
  

• Step 2: Enable USDT payment methods in the payment list