`tx_info` endpoint sometimes returns random assets in the `collateral_output` field

[fallen-icarus]

Describe the bug Consider these two transactions:

168c1c4b71595c6e2c4191cea58dc58667657f04afb677bc70e0ac4b7da9f7bc
6fc9e482959befc6928d2691caa62c8a52a5abce167bd5fce8874cc315bb346d

In both transactions, the same UTxO is used for collateral:

4cc5755712fee56feabad637acf741bc8c36dda5f3d6695ac6487a77c4a92d76#0

The UTxO does not contain any native assets. However, querying the transactions with this query (one at a time):

curl -X POST "https://preprod.koios.rest/api/v1/tx_info?select=collateral_output,collateral_inputs"  -H "accept: application/json" -H "content-type: application/json"  -d '{"_tx_hashes":["6fc9e482959befc6928d2691caa62c8a52a5abce167bd5fce8874cc315bb346d"]}'

sometimes returns a collateral output with native assets. The native assets returned are not part of the transaction, and are not even in the addresses involved.

[rdlrt]

Thanks for raising @fallen-icarus , will be addressed via linked PR

[fallen-icarus]

Is the response now supposed to return a string when the collateral output's asset list is empty? The following query now occassionally returns "[]" instead of []for the asset list:

curl -X POST "https://preprod.koios.rest/api/v1/tx_info?select=collateral_output->asset_list"  -H "accept: application/json" -H "content-type: application/json"  -d '{"_tx_hashes":["6fc9e482959befc6928d2691caa62c8a52a5abce167bd5fce8874cc315bb346d"]}'

The JSON response alternates between:

[
  {
    "asset_list": "[]"
  }
]

and

[
  {
    "asset_list": []
  }
]

[rdlrt]

Should be resolved as of Koios v1.2.0a , please report if you still see issues