feature: return tx subtype on tx summary

[selankon]

Describe the feature

Return tx subtype on a transaction summary on:

chain/transactions/page/0
chain/blocks/1374876/transactions/page/0

Motivation

When getting a list of txs on the explorer, a nice feature requested is to show the tx subtype instead of the tx type.

Constraints & Assumptions

Maybe can be also implemented on fees endpoints because they have tx info and the tx type.

/chain/fees/page/:page
/chain/fees/reference/:reference/page/:page
/chain/fees/type/:type/page/:page
/accounts/:accountID/fees/page/:page

[altergui]

for example this?

  "transactions": [
    {
      "transactionNumber": 15,
      "transactionHash": "33099c5f35e2e7e6473d7825448755a60eee5f47fa86134560f11233173ac5d7",
      "blockHeight": 292,
      "transactionIndex": 0,
      "transactionType": "setAccount",
      "transactionSubtype": "SET_ACCOUNT_INFO_URI"
    },
    {
      "transactionNumber": 14,
      "transactionHash": "d542ce00d608e2a9b52673fba5770e4d93118797f441ca6bd25d45cb688861d7",
      "blockHeight": 291,
      "transactionIndex": 0,
      "transactionType": "setAccount",
      "transactionSubtype": "CREATE_ACCOUNT"
    },

feedback welcome. i could make it lowerCamelCase but then it will differ from what is shown when fetching the full tx , on tx.setAccount.txtype is uppercase with underscores

[altergui]

this is an example of the full tx

curl -s "http://localhost:9090/v2/chain/transactions/292/0" | jq
{
  "tx": {
    "setAccount": {
      "txtype": "SET_ACCOUNT_INFO_URI",
      "nonce": 0,
      "infoURI": "ipfs://bafybeicqgij33divxkjsfoe7vw7u2l66fmdbchmj5cwlthk34qh7wrcmlm",
      "account": "eaGryPh2PiZE+0F6v4jrwaBWzvQ=",
      "delegates": []
    }
  },
  "txInfo": {
    "transactionNumber": 15,
    "transactionHash": "33099c5f35e2e7e6473d7825448755a60eee5f47fa86134560f11233173ac5d7",
    "blockHeight": 292,
    "transactionIndex": 0,
    "transactionType": "setAccount",
    "transactionSubtype": "SET_ACCOUNT_INFO_URI"
  },
  "signature": "4de7fbf60d6a616b80dc92dbf6b330a907a9b348ef81e0e7918a9033047000b101485550cf777ecaf4bfd03fce58cb365ad633130728b4ddbc828534693528cb01",
  "account": "79a1abc8f8763e2644fb417abf88ebc1a056cef4"
}

(note that account field is present as well, from another feature i'm working on)

[altergui]

interestingly enough, the current /chain/fees endpoint DOES report the "sub" txtype

 $ curl -s "http://localhost:9090/v2/chain/fees" | jq
{
  "fees": [
    {
      "cost": 1,
      "from": "5ba763c9f904290c262cfe2c798e962175429260",
      "height": 295,
      "reference": "0x79a1aBc8F8763e2644FB417Abf88eBc1a056CEF4",
      "timestamp": "2024-08-26T17:31:09Z",
      "txType": "send_tokens"
    },
...
    {
      "cost": 1,
      "from": "79a1abc8f8763e2644fb417abf88ebc1a056cef4",
      "height": 292,
      "reference": "ipfs://bafybeicqgij33divxkjsfoe7vw7u2l66fmdbchmj5cwlthk34qh7wrcmlm",
      "timestamp": "2024-08-26T17:30:50Z",
      "txType": "set_account_info_uri"
    },
    {

named txType, and value in lowercase, with underscores

[altergui]

i wouldn't touch the current /chain/fees format,
so i'll just make the new field lowercase_with_underscores, for consistency