Clarify why there's an extra 0.01 ALPH per token added in the tx

[nop33]

It's confusing that when sending tokens, there's an additional 0.01 ALPH per token that is added to the transaction. The UI should clarify why this is happening.

@polarker could you please remind me of the reason so that I can think of how to best present this info to the user? Was it because every UTXO should have a small amount of ALPH for some technical reason?

thx!

[polarker]

The 0.001 ALPH is the minimal requirement per UTXO to avoid utxo spamming. There are usually two outputs in a simple token transaction, one for the recipient and another one for change output. That's why you see 0.002 ALPH in the output.

Edit: updated the minimal requirement

[VDAODAO]

@polarker Am I missing something here? When I try sending tokens with the browser extension, it sets the "minimal requirement" at 0.001 ALPH.

See this: https://explorer.testnet.alephium.org/transactions/81e3e0eb60b259ed77a94c999744c452b8d76337d6eae6b74825a93fc581f274

or this: 0f8e157c46edc7a9b4ef55f60061c992423fb0558ca76a0e725097671464e944

my desktop (and browser) wallets both indicate the "minimal requirement" was 0.001 ALPH.

[polarker]

@VDAODAO Nice catch. It is 0.001 ALPH, not 0.01 ALPH.

[VDAODAO]

@polarker to be fair it's @JKtranslator who pointed it out to me while we were investigating the "minimal requirement"!

[polarker]

Here is the definition in the web3 SDK: https://github.com/alephium/alephium-web3/blob/master/packages/web3/src/constants.ts#L24

[mvaivre]

@nop33 this can be closed I believe?

[nop33]

No, because we still don't clarify through the UI

[nop33]

I feel that this should be part of the next release (v2.1)... As a minimum requirement, we could have an info icon ℹ when there's 0.001 ALPH added to a tx without the user manually adding it that links to a part of our docs that explains why this happens.

Currently, when I try to send 1 TETH, I get this screen with no explanation as to why 0.001 ALPH was added to my tx:

@mvaivre @VDAODAO what do you think?

[mvaivre]

Yep, agreed, we should add an info icon redirecting to a paragraph in the docs.
Also, I'd make sure that the token(s) to send are displayed above the amount in ALPH in cases like this, WDYT?

[nop33]

Good point.

That means we need a paragraph in the docs :)