按单号查询支付订单

# 签名算法（stringToSign / 4 个 header）见 /docs/api/auth
API_KEY=pk_test_xxx
SECRET=sk_test_xxx
METHOD=GET
REQ_PATH='/api/v1/payment/orders/by-app-order-no?appOrderNo=ORDER_20261023_0001'
BODY=''   # GET 无 body，SHA-256 取空串
TS=$(( $(date +%s) * 1000 ))
NONCE=$(uuidgen | tr -d '-' | tr '[:upper:]' '[:lower:]')
BODY_SHA=$(printf "%s" "$BODY" | openssl dgst -sha256 -hex | awk '{print $2}')
SIG=$(printf "%s\n%s\n%s\n%s\n%s" "$METHOD" "$REQ_PATH" "$TS" "$NONCE" "$BODY_SHA" \
  | openssl dgst -sha256 -hmac "$SECRET" -hex | awk '{print $2}')

curl -X GET "https://api.pqpa.com$REQ_PATH" \
  -H "X-Api-Key:    $API_KEY" \
  -H "X-Timestamp:  $TS" \
  -H "X-Nonce:      $NONCE" \
  -H "X-Signature:  $SIG"

{
  "code": 0,
  "data": {
    "id": 5001,
    "appOrderNo": "ORDER_20261023_0001",
    "checkoutUrl": "https://pay.example.com/checkout/3f9c...e1",
    "fiatCurrency": "USD",
    "fiatAmount": 100.00,
    "payCurrency": "USDT",
    "chainId": 3,
    "chainCode": "TRON",
    "chainTokenId": 50,
    "tokenSymbol": "USDT",
    "payAmount": 100.010001,
    "rateSnapshotId": 7001,
    "rate": 0.99990000,
    "rateSource": "THIRD_PARTY",
    "rateLockTime": 1792732500000,
    "rateExpireTime": 1792732800000,
    "rateExpireTimeMillis": 1792732800000,
    "ratePrecision": 8,
    "payPrecision": 6,
    "slippageBps": 0,
    "paidAmount": 100.010001,
    "overpaidAmount": 0,
    "supplementExpireTime": null,
    "exceptionReason": null,
    "handlingStatus": "NONE",
    "payAddress": "TXyz...abc",
    "memo": null,
    "status": "PAID",
    "txHash": "a1b2c3...",
    "callbackTaskId": 88001,
    "partialCallbackTaskId": null,
    "expireTime": 1792732800000,
    "expireTimeMillis": 1792732800000,
    "extras": "{\"userId\":\"u_1024\"}",
    "createTime": 1792732500000,
    "updateTime": 1792732620000
  },
  "msg": ""
}