T-0 Integration Guide

Overview

The T-0 Sandbox Bridge provides a complete sandbox environment for testing T-0 Provider flows.

Quick Start

1. Navigate to the Sandbox
2. Publish a Quote with your desired currency and rate
3. Simulate USDT settlement inbound notification
4. Accept a payment against the quote
5. Process payout to confirm the transaction

API Authentication

All API requests must be signed with ECDSA secp256k1:

1. Build payload: body + 8-byte little-endian Unix timestamp
2. Hash with Keccak-256
3. Sign with secp256k1 private key
4. Include headers:
   • X-Signature: 0x + 65 bytes hex (v+r+s)
   • X-Public-Key: 0x + 33 bytes hex (compressed)
   • X-Signature-Timestamp: Unix timestamp in milliseconds

Supported Currencies

• USD, EUR, GBP, CNH, MXN, BRL, NGN, INR

Volume Bands

• 1,000 | 5,000 | 10,000 | 25,000 | 250,000 | 1,000,000 USD

Event Types

• QuotePublished - New exchange rate quote available
• USDTTransactionNotification - USDT inbound settlement
• CreditUsageNotification - Credit line usage
• PaymentAccepted - Payment accepted by provider
• PayoutAccepted - Payout processing started
• PayoutSuccess - Payout completed successfully
• PaymentConfirmed - Payment confirmed