Questions tagged [utxo]
For questions regarding unspent transaction outputs (UTxO) aka. extended unspent transaction outputs (eUTxO) of Cardano.
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Retrieve ADA from a UTXO address linked with my ADA account on Ledger
I sent ADA from an exchange to Ledger, to an address listed as part of a set of addresses used as the receive address for a previous transaction.
I chose one of these multiple "To" addresses ...
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1
answer
25
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How web3 protocols know which UTXOs should be consumed
I'm trying to get the history interaction of a wallet on Levvy Fi via Cardano db sync. But I find it difficult to understand how Levvy Fi generates a wallet with their scripts and how they know which ...
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14
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How to get pointer to an actual cardano address by pool script hash in format "script...."?
The address format is script15ew2tzjwn364l2pszu7j5h9w63v2crrnl97m074w9elrkxhah0e. In this example from https://github.com/DefiLlama/DefiLlama-Adapters/blob/main/projects/minswap/index.js, you can ...
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What DAPPS Can Be Built On EUTXO Chains That Account Based Chains Cannot Make?
I remember reading that the EUTXO model is a superset of the account-based model. My question is does this mean that there are some types of Dapps that can only be built on EUTXO chains, and if so ...
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Error: encoding/hex: invalid byte: s When using Lucid calling payToContract
I am getting an issue when creating a Lucid transaction and calling payToContract
I have created the datum and it is erroring on the line that converts this datum toHex
With the following error: Error:...
- 101
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2
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132
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Cardano Multi-Sig Mint BabbageOutputTooSmallUTxO
I’m trying to build a multi-sig transaction to mint an NFT. The transaction will take some input from users wallet via coin selection and add an additional NFT as output.
The problem begans, when the ...
- 23
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70
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What are the differences between different kinds of datums (datum, datumhash, inlineDatum, inlineDatumHash)?
I sent some ADA to a smart contract address with the non inline datum of "1234" and when i queried the utxo with cardano-cli, I got this result.
"...
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57
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Is there a way to find the price of an asset from the JSON object of a transaction received from a Blockfrost webhook?
I am trying to find the price of an asset from a transaction JSON object that I receive from a Blockfrost webhook in which I track transactions from and to JPG store, the object has all the ...
- 3
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18
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Error deserializing multiple UTXOs
When deserializing multiple UTXOs from the same wallet, in some point of the rawUtxos the process crash with this error. When doing the same process to deserialize the same UTXO but not on a loop, it ...
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How to get all unSpent UTXOs at script address OnChain
Hi i am building CrowdFund where i need to know the total amount raised at the script as an OnChain validation.
i was looking at Contexts.findOwnInput but would this only return the tx-in's provided ...
3
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When multiple users try to spend the same output at the same time, who will get priority?
Let's assume we have some NFT minting drop with more than 1000s of participating buyers who try to spend the same output, all at the same time. How does the chain decide who gets to spend the output? ...
- 172
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35
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cardano-db-sync different tx, same hash?
I'm listening for new records added on block table and have noticed that sometimes two blocks are added almost at the same time with basically the same info except for block hash (maybe a slot battle/...
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Is the UTxO for change always the very last index of the outputs?
Given a transaction with multiple outputs, is the UTxO for the change always the very last index of the list of all outputs?
To demonstrate what I mean:
Given the following theoretical transaction
...
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2
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104
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Sending ADA to multiple wallets in a single transaction
We are looking options that current exist for sending 20-40ADA to multiple wallets (20+) simultaneously in a single transaction. Initially the need might only be 10 receiving wallets but might scale ...
1
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103
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Sending consecutive transactions will result in an error
Sending consecutive transactions will result in an error.
Using the simple-transaction example below, a transaction is created in Cardano-Serialization-Lib and sent to the blockchain using BrokFrost.
...
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Cardano java lib
Can someone help me understand the below error message better. It first started appearing about 2 months ago when I mint tokens, and I cant seem to get to the bottom of it. I understand the ...
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How to get TransactionUnspentOutput as a hex encoded bytes string programmatically
So basically I want to convert a normal UTxO hash like:
550665309dee7e2f64d13f999297f001763f65fe50bb05524afc0990c7dce0c3
to a TransactionUnspentOutput as a hex encoded bytes string like:
...
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1
answer
28
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Transaction submission times
I am building an NFT marketplace on Cardano which supports 3 wallets: Typhon, Yoroi and Nami.
I have to mint an NFT right before putiing it on sale, so I figured I need to wait for the newly minted ...
1
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0
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64
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TxOutRefNotFound when using Plutus.Contract.Wallet (getUnspentOutput)
I am trying to get a UTxO of the current wallet, use it to mint a token via the OneShotCurrency type, but I keep getting the following Error:
(TxOutRefNotFound (TxOutRef {txOutRefId = ...
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77
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Is it possible to change the minimum ada value for an UTxO?
If I want to send a token or NFT in Cardano, I need to include some ada with it. This is known as minimum-ada-value.
Is it possible to change this value for a specific NFT and make it so big that it ...
- 1,055
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2
answers
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Is the fact that EUTXO can use scripts to lock/unlock UTXOs really a difference from the UTXO model?
In the EUTXO explainer it says that
[The EUTXO model] generalizes the concept of ‘address’ by using the lock-and-key analogy. Instead of restricting locks to public keys and keys to signatures, ...
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How did SundaeSwap solve the scalability issue associated with consuming the same UTxO more than once in the same block?
I know that this was a very hot topic when SundaeSwap came out.
How did the team solve this?
- 1,055
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What is a Semantics Model?
In the eUTxO research paper by IOHK, it mentioned that the eUTxO model is able to enable both expressive smart contracts and keep the simple semantic simplicity of the UTXO model.
But what does ...
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37
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How can I see if an UTxO holds an NFT in the postgres DB?
Is it possible to find out if an UTxO on the tx_out postgres table holds an NFT? OR in generell which kind of asset this UTxO holds?
Thank you!
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How can I build a transaction to register a stake pool using Cardano Serialization Lib?
I have built the following transaction to register a stake pool:
{
"txHash": "0f874a3cb0ba57ed68a79601781eb9e29666f7f2f0e72ab4ed1f3cc9fcea7dee",
"ttl": 60310548,
&...
- 1,055
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1
answer
45
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How to convert UTxOs from Graphql to Cardano Serialization lib format?
I want to use this function as coin selection for my transactions:
txBuilder.add_inputs_from(unspentOutputs, 3);
The problem I have is I'm using cardano-graphql to retrieve UTxOs:
{
"data"...
- 1,055
2
votes
1
answer
173
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Get transaction unspent output value
I have payment signing key and staking signing key of my wallet. How can I get transaction unspent outputs with cardano-cli/cardano-serialization-lib/pycardano.
I expect to get string like this ...
- 21
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142
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What's the correct way of deserializing a UTxO?
I'm getting the following error when trying to deserialize a UTxO obtained using cardano-graphql:
Deserialization failed in TransactionUnspentOutput because: No variant matched
This is the code that ...
- 1,055
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2
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195
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How can I build a transaction to send different assets (not just ada) using Cardano Serialization Lib?
I have followed this example on how to create a transaction to send ada and I had no issues so far.
What I would like to do next is to add different assets to this same transaction.
Is there an ...
- 1,055
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25
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Do I need to validate for minADAUTxO output in Smart Contract validator?
I have a spending validator that currently expects an output with an NFT to be recreated at its own address.
Is it necessary to also include a check whether the output's value has a greater equal ADA ...
- 1,162
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151
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utxo fail problem(utxo fee too small
we faced the utxo failure issue
the error message is like
message: '"transaction submit error ShelleyTxValidationError ShelleyBasedEraAlonzo (ApplyTxError [UtxowFailure (WrappedShelleyEraFailure (...
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3
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249
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Get Value of Datum from a UTXO
I currently have a utxo that i am getting like this.
initalMatchPool <- Map.filter (findInitalAmount fundAddress) <$> utxosAt scrAddress
How do i get the value of the datum attached to this ...
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59
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A Script With Multiple Different Datum Types
I have 4 different Datum Data Types in my script because for 4 different use cases in my script.
data FundCreationDatum = FundCreationDatum
{ vFundOwner :: PaymentPubKeyHash,
vPrizeAmount :: ...
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2
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How to determine the number of actual "transactions" in a transaction?
You may have seen some of the online discussions on Twitter about Cardano TPS (Transactions Per Second) count. It lead me down the rabbit hole of trying to see if I could calculate TPS more accurately....
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45
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What are the current options for spending a UTxO at a script address?
If the following script is protecting a UTxO
{
"type": "all",
"scripts": [
{
"type": "after",
"slot":...
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35
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Filter for utxos that was send from a specific public key address
In the pionner program they have this logic where they filter through utxos and get a specific set of utxos.
{...}
utxos <- Map.filter (isSuitable pkh) <$> utxosAt scrAddress
{...}
where
...
- 466
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1
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51
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How to see UTXOs at a script
I am creating a function that takes in UTXOs at a script as a parameter. I know there is a function Plutus.Contract.utxoAt but how do i see what that will return ? I am still developing out my script ...
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vote
1
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74
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Get UTXO or tnx hash from nami Collateral
I am using the function cardano.getCollateral() in the nami wallet library which gives me the utxo of a collateral, lets say it is: "...
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3
answers
93
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How to allow non deterministic spent output
I would like a validator (or a minting policy) to succeed always but only to spend the output if some conditions are met;
an example use case of such behaviour is to allow burning token (kind of a &...
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169
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minted NFT is shown as solid color of picture in Nami wallet
I have some questions about NFT mint.
I minted NFT using Nami Wallet API, but sometimes error occurred.
I need to mint several NFTs at once. So I submit minting transactions in for loop.
But ...
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2
answers
165
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relationship between seed phrase, wallet address, public key, UTxO, verification key, and signing key
Everything I read about cryptography talks about a "public key" and a "private key". However, the Cardano CLI reality appears more complex.
As I understand it, the 24 word seed ...
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111
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how can I increase the address gap limit in daedalus?
Problem: Payments to a wallet don't show in a daedalus wallet, because it was sent to an address that exceeds the gap.
How can I increase the gap so I can see (and consume) that utxo?
- 1,557
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252
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How to combine or spend the rest of utxos
I have several utxos in my cardano wallet address created via the cardano-cli that have 1-4 ADA each. Some utxos have an NFT associated with them. Is there a way to spend the rest of several utxos in ...
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1
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157
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Script Witness Not Validating for Multisig
I'm getting the following error when trying to consume a UTxO sitting in a multisig script address:
[
{
"scriptWitnessNotValidating": [
"...
- 1,055
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What's the Lars' UTXO diagrams tool?
Maybe this is not a very interesting question but I'd like to know which is the tool that Lars uses in the lectures to draw UTXO's graphs.
Thanks in advance!
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Smart contract configuration
Is it possible to write smart contract validator that would check:
if UTXO that contains service price information was included so only script can read what is actual price of the service.
UTXO with ...
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0
answers
77
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script for automation sending tokens [closed]
i just finished my first script and would love to share some ideas and also to listen your opinion for additional development.
how the script works and what it does
create Log file :)
while (looping)
...
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133
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How are datums retrieved from UTXOs by on-chain code?
How is Plutus on-chain code able to retrieve and decode datums from UTXOs of ScriptContext?
These datums are hardly found in cardano-db-sync or explorers anywhere?
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95
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Is eUTxO a generalisation of UTxO
To me it sounds like UTxO is a very specific implementation of the more general eUTxO protocol. So could eUTxO be (in theory) be used to implement UTxO? Not that one would - but just to understand the ...
- 141
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How to get information about UTxOs which created locking transaction on the on-chain?
I would like to create a smartcontract which makes sure that only the same person who made specific locking transaction can unlock that same specific transaction or to put it into simpler terms if Bob ...
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