Questions tagged [tx-extra]

Questions about the tx_extra_field and its possible use cases

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Correctly retrieving the tx_pubkey from a transaction

I found, in the code, an example of a function that retrieves a public key from a transaction. The comments say that because of a previous bug, the tx may contain more than one public key. Do I ...
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1answer
58 views

How to use the --extra-messages-file option?

monerod has an option to include an extra message in a coinbase transaction with --extra-messages-file. What format should the text in the file be? Hex, Decimal, or some other format? Once the ...
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2answers
487 views

How to use tx-extra

How can I use tx-extra to store something in it? For example with simplewallet. Any help with this would be Greatly appreciated! Thanks in advance!
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2answers
139 views

An example of transaction with at least two subaddress destinations

Could you provide an example of already mined transaction that has at least two outputs leading to a non-change subaddresses? If my understanding is correct this should be visible from the blockchain,...
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1answer
184 views

Is the tx-extra field publicly visible?

If I put something in the tx-extra field of a transaction, will it be publicly visible and unencrypted? That is, anyone can see it on the public view of the monero transactions? And I assume the tx-...
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1answer
114 views

How much I “deanonymize” transaction when I put my address into “extra” part of a transaction?

Does it break untraceability or unlinkability (or something else) if everyone can see the sender's address (or one of the senders because of mixins)? And I mean doing it for example for every 10th ...
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1answer
140 views

Was the reasoning behind the large tx extra in minergate's transactions ever revealed?

It's absolutely enormous. Was it revealed why it's used? This is a Minergate block: http://explore.moneroworld.com/tx/bba343e5e172f07f623fb34c0cbd26519567cc374c5d61d468d370714f3d5b66 This is a ...
3
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1answer
138 views

Why some coinbase transactions have very long extra field, and some short?

Wondering what is the difference between coinbase transactions. For example, this coinbase transaction has short extra field: https://moneroexplorer.com/tx/...
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1answer
236 views

As a miner how would I put data in the 'extra' field?

How would I be able to put data in the extra field for say a nonce or whatever?
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3answers
178 views

Is there a way to cap the size of the tx_extra_field?

Right now, the only suggested use-case for the tx_extra_field is for the payment ID. Can we limit the size of the tx_extra_field to a specific size to prevent people from abusing placing a large ...
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2answers
177 views

Does the new v5 hardfork low fee option create a risk for blockchain bloat?

I understand the only thing limiting people from inserting, for example, a 180MB FLAC encoded recording of The Sign into the tx-extra field in a Monero transaction is the high fees they pay per kb. ...
8
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2answers
254 views

Why is the payment ID specified on a per TX basis?

I understand that the payment ID is stored in the tx-extra field. Only one payment ID can be specified when sending, even when sending to multiple addresses, because it's specified on a per-tx basis. ...
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1answer
62 views

Ability to return funds

At a protocol level is there anyway to embed a return address to allow a transaction recipient to send funds back?
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1answer
433 views

Is it possible to embed message for recipient in transaction?

I would like to embed human-readable short text message to outgoing transaction such that only the receiver can read it. May be reasonably short. Something similar like in wire transfer when sending ...
3
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1answer
254 views

failed to deserialize extra field

I've started simplewallet together with bitmonerod and looking into simplewallet.log file I can see something like this: 2016-Sep-08 12:01:29.853608 [RPC0]Transaction extra has unsupported format: &...
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1answer
755 views

How are the various tx-extra types/formats used?

Reading the code, I see that transactions can contain an unlimited number of tx_extra_field items. tx_extra_field is defined in src/cryptonote_core/tx_extra.h as a union of a few possible types, ...
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1answer
241 views

Counterparty On Monero

Counterparty is a cryptocurrency that sits in a layer 'on top of' Bitcoin. Unlike colored coins, which map identities to units of Bitcoin, Counterparty tokens aren't attached to any units of Bitcoin ...