Question about TxIx

Staking & Delegation Operate a Stake Pool
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1

I did some test raw transactions.
First I queried the payment.addr like so:

cardano-cli shelley query utxo --address $(cat payment.addr) --testnet-magic 42

and get the result:

                       TxHash                                 TxIx        Lovelace

7e741b4a5f7098ed5a50b9a501a7f5ff6d659457564321c757be9bffc9500da4 0 1000000000
a6e2a84de691c670ce7d869d040598135af0c243282c7ba17ab3861a750b1a3a 1 899832035

So there are 2 Transactions, with TxIx of 0 and 1.

Then after I send another Transaction, I query it again and I get:

                       TxHash                                 TxIx        Lovelace

7e741b4a5f7098ed5a50b9a501a7f5ff6d659457564321c757be9bffc9500da4 0 1000000000
80d8d92a1bcbda3289e760b3a680951c5dd4da3455edd2d149a0f120d4e4712f 1 399632035

Shouldn’t there now be 3 results? TxIx 0, TxIx 1 and TxIx 3 ?
The balance now of TxIx 1 is correct, but I don’t understand why there aren’t 3 entries?
Is this normal? if anyone can explain this to me, I’d appreciate it.
Thanks

2

If you open you everyday wallet, and it contains a 20€ and a 10€ notes, if you decide to spend 5€ and use the 10€ note for that, you will receive one 5€ note in exchange. Your wallet now contains the initial 20 € note (your first utxo) that you haven’t touched, and a fresh 5€ note as change, that you have never seen before. > 2 notes, not 3.

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3

Thanks,
I understand that. But what are the TxIX 's for ? what is the meaning of 0 or 1?
Sorry if that sounds like a dumb question!

4

The TxId values are the indices of the outputs in that particular UTxO. They are zero based and start from zero for each new transaction.

5

thank you erik. So how would they go above zero? if they go to zero every time there is new transaction? is there a page where I can read about exactly how that works?

6

All transaction have one or more outputs. The outputs within a transaction are numbered 0, 1, 2, .... . This is the standard UTxO model used in Bitcoin and many other cryptos (but not Eth). A quick google search turned up this explanation: https://komodoplatform.com/whats-utxo/ . I am sure there are many others.

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7

Thanks mate, I appreciate the help. And well done with Cardano.
I’m really excited to be a part of it. It’s actually really easy to use when you take a bit of time to read the docs. And it just works. Nice.
I now got my pool up and running. Found some blocks. Awesome.

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