Questions tagged [validation]
The validation tag has no usage guidance.
19 questions
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Lucid Error "End of input in bytes"
I am running the simple vesting script from PPP for the first time with Lucid and I continuosly get an error which doesn't give me much to understand what could realistically be the source of.
the ...
CommunityBot
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Whether validation checks are necessary
In Plutonomicon github repo it says by the end of the page:
For example, you don't need to prevent an unexpected transaction from locking value away - that's the submitter's own problem - but you do ...
CommunityBot
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on multiple eUTxO and the validation proces
I have an in-depth question that needs good knowledge of the ledger rules.
I was thinking about how to program efficiently and design apps such that they are parallelizable, a good practice for ...
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mustMintValueWithRedeemer - Number of tokens minted
On the Offchain code I am trying to mint a token using the following snippet
Constraints.mustMintValueWithRedeemer r (assetClassValue cTk 1)
In the validation code of the minting script I am trying ...
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2 Validators for one Transaction
I'm building a use case where a person can buy a token and depending on the amount of ADA spent, he gets X tokens and a Special NFT.
Each Validator represent the policy Id of these native tokens I'm ...
- 1,560
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Opportunity for theft of funds in Martify marketplace
I am some kinda embarrassed by "mkBuyValidator" in Martify Marketplace on-chain code . For buyer there is only one check for token transfer (on line 68):
(valueOf (valuePaidTo info sig) (...
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Contract is not stopping execution if validation script fails (happened after 2022-04-06 PAB Release)
Before the 2022-04-06 PAB Release Contracts used to stop execution after validation script failed the transaction sent by submitTxConstraintsWith, but after this release Contract is not stopping its ...
CommunityBot
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How to Validate A Smart Contract Twice?
I have a smart contract I want to validate at a certain date. Exacute its logic and then revalidate on a second date. The trick is I only want it to be signed once. How do I do this?
can I just add ...
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Can temporary forking occur in Cardano's protocol?
In Bitcoin's protocol (and similar PoW systems), at one point chain might temporarily split in two and two different chains will be maintained up until one outpaces the other and proves itself as the ...
CommunityBot
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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": [
"...
- 1,095
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How to retrieve an addresses transaction history inside a plutus contract
I am trying to implement so logic to ensure smart contract (SC) validation upon certain conditions - which are derived from the end-users transaction history.
If I parameterise the SC and take the ...
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What is where executed and when?
To wrap my around what happens when I where, I tried to visualize it. In order to be able to show the interaction between two different systems generating transactions, I have a Generator A and ...
- 1,521
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terminology validation and verification
Is there a strictly defined term for validation and verification or are they interchangeable?
Are validations strictly used for transactions e.g. validate a transaction?
Is verification strictly used ...
- 3,699
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Is it possible to validate on-chain if two different wallet addresses come from the same person?
My goal is:
I would like to create a smart contract which would verify if unlocking transaction comes from the same person as the wallet address which is known before hand.
What I have tried:
I have ...
- 599
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Why is there no mechanism available to restrict creation of UTXOs at a script address?
It has been told that anyone can create UTXOs at any script address without restrictions since the validator does not run for transaction that do not consume UTXOs. The question is, why so?
I think it ...
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520
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When is an eUTXO consumed?
Scenario
There are two transactions tx1 and tx2 both trying to consume an arbitrary eUTXo oRef. Both tx1 and tx2 are submitted to the mempool in the same block, and are valid transactions; we can ...
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Can you specify an upper and lower bound for the validity period of a transaction?
I want a transaction to only be valid for a certain period of time relative to some specified start time. I thought that maybe I could use Constraints.mustValidateIn (interval firstInterval $ ...
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Is there a way for a validator to get the current time?
Is it possible for a validator to get the current time without it being passed in via the redeemer? My validator is heavily dependent on the time being correct so it would probably be a bad design ...
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StateMachine validation failing
Transition function throws an error. Here it is.
transition :: FreelanceContract -> State FContractDatum -> FContractRedeemer -> Maybe (TxConstraints Void Void, State FContractDatum)
...
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