solana:<recipient>?amount=<amount>&spl-token=<mint>&reference=<reference>&label=<label>&message=<message>&memo=<memo>

RECIPIENT=$(solana address --keypair "$SOLANA_KEYPAIR_PATH")
AMOUNT="1.5"
REFERENCE=$(solana-keygen new --no-bip39-passphrase --silent --outfile /dev/stdout | head -1)
LABEL="My Store"
MESSAGE="Order #12345"

# Build Solana Pay URL
PAY_URL="solana:${RECIPIENT}?amount=${AMOUNT}&reference=${REFERENCE}&label=${LABEL}&message=${MESSAGE}"

echo "Payment URL: $PAY_URL"

# Generate QR code (requires qrencode)
echo "$PAY_URL" | qrencode -o payment_qr.png -s 10
echo "QR code saved to payment_qr.png"

RECIPIENT=$(solana address --keypair "$SOLANA_KEYPAIR_PATH")
AMOUNT="100"
SPL_TOKEN="EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"  # USDC
REFERENCE=$(openssl rand -hex 32)
LABEL="My Store"
MESSAGE="Order #12345"

# Build Solana Pay URL with SPL token
PAY_URL="solana:${RECIPIENT}?amount=${AMOUNT}&spl-token=${SPL_TOKEN}&reference=${REFERENCE}&label=${LABEL}&message=${MESSAGE}"

echo "Payment URL: $PAY_URL"
echo "$PAY_URL" | qrencode -o payment_qr.png -s 10

REFERENCE="<REFERENCE_PUBKEY>"
RPC_URL="${SOLANA_RPC_URL:-https://api.mainnet-beta.solana.com}"

# Find transaction with reference
curl -s -X POST "$RPC_URL" \
  -H "Content-Type: application/json" \
  -d "{
    \"jsonrpc\": \"2.0\",
    \"id\": 1,
    \"method\": \"getSignaturesForAddress\",
    \"params\": [\"${REFERENCE}\", {\"limit\": 1}]
  }" | jq '.result[0]'

SIGNATURE="<TX_SIGNATURE>"
EXPECTED_RECIPIENT="<MERCHANT_WALLET>"
EXPECTED_AMOUNT="1000000"  # in lamports or token units

# Get transaction details
TX=$(curl -s -X POST "$RPC_URL" \
  -H "Content-Type: application/json" \
  -d "{
    \"jsonrpc\": \"2.0\",
    \"id\": 1,
    \"method\": \"getTransaction\",
    \"params\": [\"${SIGNATURE}\", {\"encoding\": \"jsonParsed\", \"maxSupportedTransactionVersion\": 0}]
  }")

# Verify recipient and amount
echo "$TX" | jq '.result.transaction.message.instructions[] | select(.parsed.type == "transfer")'

# Server endpoint that returns transaction
TRANSACTION_URL="https://your-server.com/api/pay"

# Solana Pay URL pointing to transaction endpoint
PAY_URL="solana:${TRANSACTION_URL}"

// POST /api/pay
// Returns serialized transaction for wallet to sign

app.post('/api/pay', async (req, res) => {
  const { account } = req.body;  // Payer's wallet
  
  // Build transaction
  const transaction = new Transaction();
  transaction.add(
    SystemProgram.transfer({
      fromPubkey: new PublicKey(account),
      toPubkey: MERCHANT_WALLET,
      lamports: LAMPORTS_PER_SOL * 0.1
    })
  );
  
  // Serialize and return
  const serialized = transaction.serialize({
    requireAllSignatures: false,
    verifySignatures: false
  });
  
  res.json({
    transaction: serialized.toString('base64'),
    message: 'Payment for Order #123'
  });
});

#!/bin/bash
# pos_payment.sh - Generate payment QR for POS

AMOUNT="$1"
ORDER_ID="$2"
TOKEN="${3:-SOL}"

RECIPIENT=$(solana address --keypair "$SOLANA_KEYPAIR_PATH")
REFERENCE=$(openssl rand -hex 32)

if [[ "$TOKEN" == "SOL" ]]; then
  PAY_URL="solana:${RECIPIENT}?amount=${AMOUNT}&reference=${REFERENCE}&memo=Order-${ORDER_ID}"
else
  # Get token mint
  case "$TOKEN" in
    USDC) MINT="EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v" ;;
    USDT) MINT="Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB" ;;
  esac
  PAY_URL="solana:${RECIPIENT}?amount=${AMOUNT}&spl-token=${MINT}&reference=${REFERENCE}&memo=Order-${ORDER_ID}"
fi

# Display QR in terminal (requires qrencode)
echo "$PAY_URL" | qrencode -t ANSIUTF8

# Save reference for verification
echo "$REFERENCE" > "/tmp/order_${ORDER_ID}_ref.txt"
echo "Reference saved. Waiting for payment..."

#!/bin/bash
# wait_payment.sh - Wait for payment confirmation

ORDER_ID="$1"
REFERENCE=$(cat "/tmp/order_${ORDER_ID}_ref.txt")
RPC_URL="${SOLANA_RPC_URL:-https://api.mainnet-beta.solana.com}"

echo "Waiting for payment (reference: ${REFERENCE:0:8}...)"

while true; do
  RESULT=$(curl -s -X POST "$RPC_URL" \
    -H "Content-Type: application/json" \
    -d "{
      \"jsonrpc\": \"2.0\",
      \"id\": 1,
      \"method\": \"getSignaturesForAddress\",
      \"params\": [\"${REFERENCE}\", {\"limit\": 1}]
    }")
  
  SIG=$(echo "$RESULT" | jq -r '.result[0].signature // empty')
  
  if [[ -n "$SIG" ]]; then
    echo "✅ Payment received!"
    echo "Transaction: $SIG"
    echo "Explorer: https://solscan.io/tx/$SIG"
    break
  fi
  
  sleep 2
done