Parameters of Transaction questions

[Wangmmx]

I read this document, http://tech.nyzo.co/dataFormats/transaction which is very helpful to me.

{
    "start_timestamp": 1618225693000, 
    "hash": "20db858edce54e6345303994eec74f02a77d3f16caa1d7787fd71cf33064a589", 
    "transactions": [
        {
            "fee": 867856, 
            "sender": "12d454a69523f739-eb5eb71c7deb8701-1804df336ae0e2c1-9e0b24a636683e31", 
            "receiver_nyzo_string": "id__81bkmarm8_tXYTYV77VIyN4p1d-RrL3zNqWb9apUr3WP-ys.NG-H", 
            "timestamp": 1618225694000, 
            "sender_nyzo_string": "id__81bkmarm8_tXYTYV77VIyN4p1d-RrL3zNqWb9apUr3WP-ys.NG-H", 
            "signature": "53deda5c5e53194aae9eb7de7bedc617a7f86d7c91fb49b216b8e0e9d1514526ba71fcfcf6c835b55f3cabc7dc68d82eae0e3ddedfc4dca9b51a33cd7a0a0b00", 
            "previous_hash_height": 0, 
            "sender_data": "", 
            "amount": 347142109, 
            "previous_block_hash": "bc4cca2a2a50a229256ae3f5b2b5cd49aa1df1e2d0192726c4bb41cdcea15364", 
            "type_enum": "seed", 
            "type": "0000000000000001", 
            "id": "803c581e05020f5c-d610d25a0ebd413a-768d7943fb73cfd6-0ddae8d66ab19b9d", 
            "receiver": "12d454a69523f739-eb5eb71c7deb8701-1804df336ae0e2c1-9e0b24a636683e31"
        }
    ], 
    "balance_list_hash": "f400305efb457c07d70a46ae2a5cb738de6c7d8bcca7bd4512e91f10bf46ec1e", 
    "verification_timestamp": 1618225701680, 
    "previous_block_hash": "be0dc3deb13dd7fd365f1431acde8d2eaa14bd3b714f508cce26bd29e2d2d597", 
    "height": 11632699
}

I can understand the basic field meaning. This is the data obtained from the JSONRPC interface according to the block method. Can the transaction status and success of the transaction be queried?

[EggPool]

With Nyzo, a transaction is final once its block is frozen.
There is no mempool, no chain reorg.

If a transaction is returned in a block, and that block number is lower than (or equal to) the frozen_edge as returned by the info command for instance, then its final.

[Wangmmx]

Ok I understand, if it is returned in the block, it proves that it has been on chain. Will there be returned when the transaction fails but on chain? Where can we show failure?

[EggPool]

If the transaction is invalid or was not included in its block, it will not be on chain, and never will be.

With Nyzo:

• A transaction comes with a timestamp. The timestamp is signed, so can't be changed afterward.
• The timestamp imposes the block the transaction can be in. One ts = one single possible block.
• When you send a tx to the network, it is embedded by the forger of this block, may not be frozen yet.
• Once frozen, a block will not change anymore.

So, when you send a transaction:

• You know for sure in what block it can be present.
• Wait for the block to be frozen (a matter of a few secs, depending on the margin you applied to the timestamp of the tx. 10sec is usually fine)
• the tx is either there (then valid and final)
• either not there (then never will be, can be re-done and re-sent)

[Wangmmx]

Ok, so the transactions on the chain are all successful and reasonable transactions, thank you for such detailed answers