Inconsistency between algod and indexer API result

[rotemh]

Subject of the issue

it seems like algod removes empty values and indxer doesn't.

Steps to reproduce

https://indexer-mainnet/v2/assets/278022289

{
"asset":{
"created-at-round": 15042440,
"deleted": false,
"index": 278022289,
"params":{
"clawback": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ",
"creator": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"decimals": 0,
"default-frozen": false,
"freeze": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ",
"manager": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"metadata-hash": "RUFEREU0NTVBOUNBQjBGRUU2NzBEREI2MDNBQjUyNDg=",
"name": "Mask #7",
"reserve": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"total": 17,
"unit-name": "MTMASK7",
"url": "https://bit.ly/3xLUSV0"
}
},
"current-round": 15252300
}

VS

https://node-mainnet/v2/assets/278022289

{
"index": 278022289,
"params":{
"creator": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"decimals": 0,
"default-frozen": false,
"manager": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"metadata-hash": "RUFEREU0NTVBOUNBQjBGRUU2NzBEREI2MDNBQjUyNDg=",
"name": "Mask #7",
"reserve": "JADXUXWQ5CWU2G2TTBMY7NCWGDHO3SLY7IPYVC37GTFARAZ2N5LBLWAP5A",
"total": 17,
"unit-name": "MTMASK7",
"url": "https://bit.ly/3xLUSV0"
}
}

Expected behaviour

I'd expect indexer to return empty values just when they have a meaning.

Actual behaviour

Indexer returns the 0 byte address here when the user probably didn't set it at all.

Acceptance criteria:

The following params (clawback, freeze, reserve) should not be returned if empty.
These params are currently optional.

[chaihoang]

Duplicate of #939