Questions tagged [transaction-metadata]

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How can I make QR codes that work with wallets like nami?

Im making payment gateways for crypto on non-web3 infrastucher. One of the ways I'm doing this is by making qr codes that after being scanned with a wallet fill in the transaction i.e. the amount of ...
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1 vote
2 answers
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How can I allow users to update a public array of data based on whether they own a token or not?

I want to construct public lists that can be altered by people who own a specific token. Is there a way I can group data together into an array like structure and allow users to append to it? I ...
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1 vote
1 answer
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Metadata transactions / eUTOX TTL / locking up ADA

I'm following this guide on metadata transactions with the cardano wallet server. My goal is to prove the existence of a given IPFS hash at a certain point in time. I don't need to send or receive ADA ...
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Understanding this transaction - why isn't it spending the full amount?

I'm doing some analysis on Db-sync and I came across a situation where it appeared the full EUTXO at an address was not being spent so wanted to see what I was misunderstanding. Here is the first ...
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How is metadata typed on the blockchain

I am reading through the haddock documentation to find the way metadata is attached to a transaction. In this documentation (1) we have data Blockchain = [Block] data Block = [OnChainTx] Where and ...
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Is there a 'Cardano Naming Service' available?

Is there any services like ENS (Ethereum Naming Service) for Cardano available now? If no, how difficult it is to come up with one?
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Submitting Transaction with CSL Metadata Isn't Showing

I've forked a dApp Connector I found on Github and I'm trying to add some transaction metadata to the ADA transaction it builds. This is what I currently have: buildSendADATransaction = async () => ...
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2 votes
1 answer
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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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2 answers
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How to Remove Burned NFTs from SQL Output

I am querying the Cardano Postgres DB and can't figure out how to remove NFTs (multi-assets) that have been burned. In the SQL query below, I am selecting the mint transactions for an asset ...
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3 votes
2 answers
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Is there a publicly available Cardano API with pre-indexed blockchain data?

I'm looking for a public API that has idempotent endpoints that can be used to query for transaction data for a given address. Specifically, I'm looking for reward payout data. Does this exist in this ...
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Cardano Wallet AP Adding Meta Data to transaction Using C#

I am trying to add meta data in transaction using Cardano Wallet API from C# program. But i am not able to model Json format for meta data to equivalent C# class model and due to this i am getting bad ...
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1 answer
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Store data in Tx Metadata on Cardano

I would like to notarize some data (like document signatures for example) of less than 500KB on the blockchain and for that I thought to use the Metadata field of a transaction. So I have 2 questions: ...
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4 votes
1 answer
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How to handle datum in a decentralized way?

What is the best practice of storing the local state of an UTXO to be publicly visible on-chain? Thinking about how application would function in the future I thought that in a good DeFi ecosystem all ...
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1 answer
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Is the metadata limit on testnet transactions the same as mainnet?

I was wondering if there was a difference in the byte limit in metadata added to test-net transactions versus being done on the main-net.
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