Key "3" decoded as "Q" symbol

[ghost]

I'm writing a content researching script. All working well there, but I've detected a strange behavior on parsing a block 308648, txid:
40bb0060b91a0b2f333b17a0da1f3dae92d9f52a904f241401f0f6cb355d37e5

What is the reason? In the wallet it is "3" and in the API response it's "Q"
(I'm using remote API by https://explorer.kevacoin.org/info to interact with the blockchain, may be issue of this service)

The script and all the decoding process presented here (but it's no problem with the literal key names):
https://github.com/kvazar-network/crawler-api-node/blob/main/crawler.php

[ghost]

It seems I've deleted an example on testing the previous issue. Anyway check the subject please.
Here is created a new one:
e7ef09905a533d33c25374fa09735a356c74c944de29dfbafc7199e4d5816cb2

[ghost]

Today, I have following errors in the script debug, some data can't be decoded to the plain text (block 852 for example):

Warning: hex2bin(): Input string must be hexadecimal string in /crawler-api-node/crawler.php on line 99

add namespace NaYeBgWHcrgCR26shgmNRyBDWdfU7iQhyo

PHP Notice:  SQLSTATE[HY000]: General error: 1366 Incorrect string value: '\x97\x14' for column 'key' at row 1 in /crawler-api-node/library/mysql.php on line 150``` 

[ghost]

I've found, that by calling to API using function keva_filter - the data returning without errors. But when I parse the raw transaction, it contains wrong encoding, for example:

https://explorer.kevacoin.org/api/getrawtransaction?txid=e7ef09905a533d33c25374fa09735a356c74c944de29dfbafc7199e4d5816cb2&decrypt=1

OP_KEVA_PUT 356a893ac5dbc64229a0700d63b019c72e5227644d 51 6973737565202332342074657374 OP_2DROP OP_DROP OP_HASH160 11dfd4642cfb603dace16aee8c8fb14da4a3d4d2 OP_EQUAL

Where 51 - is the "Q" symbol but should be the "3". Decoding mode issue?

kevacoin-cli keva_filter NVdHCy89xRKXWUG9tXBFz9e5N4JjksACoA ""
[
  {
    "key": "3",
    "value": "issue #24 test",
    "txid": "e7ef09905a533d33c25374fa09735a356c74c944de29dfbafc7199e4d5816cb2",
    "vout": 0,
    "height": 354206
  },
  {
    "key": "same 1",
    "value": "1",
    "txid": "a835a8b5a0eeab29f5719baf2c7bf08a535b9b4a6976bc4bfc62822b43e6eb33",
    "vout": 0,
    "height": 359517
  },
  {
    "key": "_KEVA_NS_",
    "value": "new name",
    "txid": "2024ef51fcf20820f6c0e2e6f74afa8f2396fbbc458ccd19687e2d3641efc880",
    "vout": 1,
    "height": 354223
  },
  {
    "key": "e7ef09905a533d33c25374fa09735a356c74c944de29dfbafc7199e4d5816cb2",
    "value": "test comment",
    "txid": "fa9ceeff4275f57db317d49a97961c60e3625c43950c9a8b665a09a0e4e6e86f",
    "vout": 1,
    "height": 354541
  }
]

[kevacoin-project]

Sorry for the late reply. Here "51" in the output of transaction decoding is decimal value, not hexadecimal value. In fact, every number that is smaller than 0xFFFFFFFF will be represented as decimal value. The behaviour is inherited from Bitcoin.

Since 51 is decimal, it represents "3" in ASCII table.

[ghost]

Thank you for reply!

I have fixed the problem by following solution, maybe will helpful for PHP devs:

function decodeString($string) {

  if (is_numeric($string) && $string < 0xFFFFFFFF) {
    return mb_chr($string, 'ASCII');
  } else {
    return hex2bin($string);
  }
}

[d47081]

Also, there is lot of hidden records in kevacoin wallet:

raw: 1952543276
bool(false)
UTF-8: bool(false)
ASCII:bool(false)
AUTO:
---
block:289919
ns:NWn2wUdctLvoatDuqFmcfxEuJmFx9EbSre