🔄 Cross-Chain Stablecoin Swap

🎯 What is This Bridge?

A cross-chain bridge that enables seamless swapping between USDC on Solana and USDD on Nexus. Move stablecoins between blockchains in minutes.

💱 Exchange Details

• Rate: 1:1 exchange ratio (1 USDC = 1 USDD)
• Fee: 0.1 USDC + 0.1% (USDC→USDD path)
• Minimum: 0.100101 (both directions)
• Speed: Typically completes within minutes

🔒 Security

• Non-Custodial: Lock-and-mint mechanism
• Transparent: All transactions verifiable on-chain
• Audited: Smart contracts reviewed for security

🚀 USDC → USDD (Solana to Nexus)

1. Connect Wallets: Choose Phantom or Solflare (Solflare has native memo UI)
2. Enter Amount: Specify how much USDC to swap (min: 0.100101)
3. Confirm: USDC is sent to vault with memo: nexus:<your_address>
4. Receive: Service validates memo and sends USDD to your Nexus account

🚀 USDD → USDC (Nexus to Solana)

1. Create Bridge Asset: One-time setup with your Solana receival_account
2. Send USDD: Debit USDD to treasury (min: 0.100101). Save the txid!
3. Update Asset: Set txid_toService to your debit transaction ID
4. Receive: Service finds your asset mapping and sends USDC

⚠️ Important Notes

• Amounts below 0.100101 are treated as fees (100% micro fee policy)
• USDD→USDC: If no asset mapping within 1 hour, USDD is refunded
• Your Solana wallet must already have a USDC ATA (most wallets auto-create)
• Keep some SOL for Solana transaction fees
• Transactions are irreversible once confirmed