Questions tagged [blockfrost]
Anything referencing to Blockfrost API.
90
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How to monitor Cardano Minswap transactions using Blockfrost?
I was trying to monitor the swap actions
like who swapped which A to B Token, as real-time from Minswap platform.
I was using Blockfrost webhook for this, but I fetched lots of transactions including ...
CommunityBot
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3
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353
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Building a transaction on cardano-cli/api without running node?
Is there a way to build and sign transactions with the cardano-cli/api without running a node? I am trying to construct a transaction using the cli or api and submit it using blockfrost. It throws an ...
CommunityBot
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28
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I want to develop my project related to Cardano
I want to develop a personal project related to Cardano. I have read some documents, but they require using project_id from Blockfrost. However, I don’t want to go that route. So, I’m wondering where ...
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3
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how to resolve this transaction submission error of MintToken with Mesh
I am Facing this error while transaction submission.
""transaction submit error ShelleyTxValidationError ShelleyBasedEraBabbage (ApplyTxError [UtxowFailure (FromAlonzoUtxowFail (...
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Blockfrost API error with pycardano
I get blockfrost.utils.ApiError: {'status_code': 400, 'error': 'Bad Request', 'message': 'Invalid address for this network or malformed address format.'}
when using pycardano and this code
# Create a ...
CommunityBot
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2
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101
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What is the output from a transaction when burning tokens?
I'm submitting a transaction to burn token to the blockfrost API and receives the following error
(ApplyTxError
[UtxowFailure
(WrappedShelleyEraFailure
(UtxoFailure
...
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1
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85
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How to loop through multiple pages of blockfrost api in Javascript
I'm trying to count the assets at a blockfrost api endpoint. It only shows 100 items on a page though. How do you loop through all the pages and extract the asset count? Thanks for any help.
const ...
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1
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36
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Mobile app security concerns
I'm looking into creating a mobile app for learning purposes and using Blockfrost as a data provider.
My initial idea is:
Device:
control the keys;
present the data;
Server:
fetch data from ...
CommunityBot
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1
answer
27
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Yarn doesn't recognise BlockFrost
Can anyone help me with this kind of error? I'm running this tutorial.
https://github.com/blockfrost/blockfrost-js-examples/tree/master/examples/simple-transaction
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How to interpret complex transaction data on cardano blockchain
for many of you this may seem as a complete noob question, but I am as many new to this world and can need a hand with this question.
I am currently looking at some random transactions of some NFTs ...
CommunityBot
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Blockfrost policy/metadata api issues
I am trying to get the metadata for the policy ID
but every Blockfrost gives error saying "invalid path"
I am able to get data related to assest using:
"https://cardano-preprod....
CommunityBot
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1
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1
answer
40
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Stream/Query transaction price history of an asset
Is it possible to get the transaction incl. price history of an asset e.g. (SundaeSwap) using blockfrost or cardano-db-sync?
If yes, is it also possible to stream this value from block to block?
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1
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How can I Convert BlockFrost API Code to Dandelion API?
I have somehow managed to get a lot of code for BlockFrost API, however, I want to build some free applications for people to monitor blockchain data from a website dashboard.
To take advantage of the ...
CommunityBot
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3
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1
answer
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Is there a way to get the current circulating supply of an asset via API?
More specific, I am looking to fetch the circulating supply of native cardano tokens with the Blockfrost API. I know how to get the total supply, but I was wondering if there is any possibility to get ...
CommunityBot
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1
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blockfrost.io API, reference inputs and redeemer tx_index
AIUI, when using the blockfrost.io API, the tx_index field in a redeemer contains the index of the enclosing transaction's input that it consumes (is that true ?).
However, with reference inputs, it ...
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TypeError: a bytes-like object is required, not 'Transaction'
I am trying to use the https://github.com/Python-Cardano/pycardano/blob/main/examples/native_token.py with minor changes, like pointing to mainnet (have tried preview as well). I have updated the ...
CommunityBot
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How to using Mesh for making transaction from specific address of seed and send ADA to another address
I was trying to make 1000 ADA addresses from one seed. I have used MESH and make payment addresses.
and deposit successfully on those addresses, now I need to send ADA from one of these generated ...
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27
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Validating ecdsa signature in aiken
Im trying to let my validator validate my ecdsa signature yet I get a weird JSON error:
Uncaught (in promise) SyntaxError: Unexpected non-whitespace character after JSON at position 4
My Validator for ...
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2
answers
46
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Could someone explain mangled addresses to me?
I am developing a dApp where a user can send a few ada (3) to an address that I am listening to on my backend server, and I send a few tokens back depending on what NFTs they have in the wallet. When ...
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Fetch rich cardano addresses?
I am building some dapps on Cardano network.
What I want to do is to
fetch cardano addresses whose balances are more than 1M ada.
Can anybody help me with this?
Thanks.
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165
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Transaction submit error MissingVKeyWitnessesUTXOW
I am @emurgo/cardano-serialization-lib-nodejs to submit transaction in cardano.
I am getting following error.
Transaction 5c98317bc6caf027b91e807ed1cdd78571b8f9a791202b5feff5b32fa5f71f1f rejected,
...
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2
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What am i doing wrong while creating this staking transaction?
i am trying to create a staking transaction using cardano serialisation library and then use blockfrost/infinito to send the transaction.
I am using @emurgo/cardano-serialization-lib-nodejs: ^9.1.4,
...
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1
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Blockfrost API 403 Error in React Node JS app
I'm trying to get info about the latest block in my React Node JS app using Blockfrost and I'm running into an error:
GET https://cors-anywhere.herokuapp.com/https://cardano-mainnet.blockfrost.io/api/...
CommunityBot
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1
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Whats the python script to check if an cardano address has a script flag?
I have a script to fetch asset name, address from a policy id with blockfrost API, now I need to see if the asset is in a smart contract script. I have no coding skills but followed a tutorial to get ...
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1
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59
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Need to Retrieve Info from (NFT)Assets in Policy ID to see if they are in a Plutus Contract (smart contract) or Not using Blockfrost API
I have a python script that retrieves the NFT asset name, and addresses of a specific policy ID using blockfrost API. Now I need to amend the script to add to the csv whether or not the specific asset ...
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1
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How can i get all buy and sell transactions for an NFT using blockfrost?
So I want to use blockfrost to extract all transactions of an NFT that are associated with marketplace trades. I understand that I can get an assets transaction history through /assets/{asset}/history ...
- 7,269
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2
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ScriptWitnessNotValidatingUTXOW while minting an NFT
I'm currently trying to create a minting process with lucid (v. 0.8.9) using Blockfrost on Mainnet.
Minting policy:
const mintingPolicy: MintingPolicy = lucid.utils.nativeScriptFromJson({
type: &...
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1
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How to get assets with a specifc policy id from a wallet address using BlockFrost OpenAPI
For context, I'm trying to get all NFTs with a policy id, but only from a wallet address. I'm using BlockFrost OpenAPI, and it seems that I can only get assets with a policy id from the entire ...
CommunityBot
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1
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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 ...
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1
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Trying to submit a minting transaction using pycardano and blockfrost
Hello Cardano developers, I really hope you can help me :)
I'm developing a Dapp and I need to mint a NFT. This works through a website, so a user clicks in a button to mint a NFT. Simple, right?
I ...
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1
answer
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Staking balance and Reward in cardano
I want to get the staking balance and reward in Cardano. I am using the Blockfrost API and I can get the staking and reward amount using the stake address.
However, what I don't understand is that the ...
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How to use webhook on Blockfrost? [closed]
I want to trigger a function when someone sent ADA to an address addr1xxxxxx.
I use webhook from Blockfrost. I see this link (https://blockfrost.dev/docs/start-building/webhooks/using-webhooks) to ...
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1
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Using Blockfrost api to get the price of an ada/token pair on Minswap
Can I use the Blockfrost API to query a pair that is on the Minswap DEX?
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1
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How to get balance of enterprise address
https://docs.blockfrost.io/#tag/Cardano-Addresses/paths/~1addresses~1%7Baddress%7D~1extended/get
I am using above blockfrost api to get address balance.
However, it isn't working with enterprise ...
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1
answer
84
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Transaction in Cardano
I created transfer function with blockfrost.js and cardano-serialization-lib.
I refered following code.
https://github.com/blockfrost/blockfrost-js/tree/master/examples/simple-transaction
When I try ...
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1
answer
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Can I use Blockfrost to call custom endpoints of my Plutus offchain contract?
Blockcfrost-related question. Can we expose our own custom endpoints in our off-chain Plutus contract, and use your API to send requests from our own frontend client? For example, if I expose an ...
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2
answers
309
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Send native tokens without running node
is there any library or proper guide to send custom/native tokens in NodeJS?
i don't want to run full node (cardano-node/cardano-wallet), just want to build and sign a transaction and submit it via ...
4
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2
answers
406
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Cardano Node + DB Sync + Graph QL vs. Blockfrost API
I've been contemplating the value of essentially running all your own infrastructure by deploying a Cardano node alongside DB Sync and exposing it through Cardano GraphQL.
I like the idea of building ...
- 7,269
1
vote
2
answers
48
views
Get pool reward for specific epoch
I want to get pool(private pool) reward for specific epoch.
I searched blockfrost.io apis, can't find reward api.
How can I get reward by api? Or other solution will be fine like graphql.
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1
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37
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Get Delegations in Cardano
I am going to get delegations list for specific pool, epoch.
https://docs.blockfrost.io/#tag/Cardano-Epochs/paths/~1epochs~1{number}~1stakes~1{pool_id}/get
I found blockfrost api and tested.
My test ...
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1
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167
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How to hide API keys when using Lucid-Cardano
Lucid-Cardano requires me to expose my api key on my client side of my app. How can I go around hiding this. I have tried to call my express backend to make a blockfrost request so that I can keep my ...
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37
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BlockFrost IPFS error
I can't upload an image to IPFS through
ipfs.blockfrost.io/api/v0/ipfs/add
from browser. I am trying to upload image dircetly from frontend of my application (browser extension). I get this response:
{...
1
vote
1
answer
36
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Error occurs in simple request to blockfrost.io for multiple wallets
This is a screenshot of console log for my problem
export const deriveStakeAddress = async ( rewardAddress: string ):
Promise<string> => {
const endPoint = `...
- 3,753
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2
answers
63
views
I'd like to get assets from the wallet using blockfrost, but some errors occur
export const callApi = async (endPoint: string) => {
try {
const request: string = env.REACT_APP_BLOCKFROST_URL + endPoint
const response = await fetch(request, {
//@ts-ignore
headers: {
"...
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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.
...
CommunityBot
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1
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Is there a possibility to fetch the volumen of e.g Minswap with Koios or Blockfrost?
I am looking for a way to get the volume of certain protocols on Cardano(e.g. Minswap or SundaeSwap). I thought of using Koios or Blockfrost, but I am not entirely sure how to get volume. If there's ...
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2
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151
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upload folder to ipfs using blockfrost
How to upload folder to IPFS using blockfrost.
able to upload a file using the following, but not able to upload a folder
curl "https://ipfs.blockfrost.io/api/v0/ipfs/add" \
-X POST \
-H ...
- 3,753
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3
answers
163
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Calculate tx fees via Blockfrost or any other provider?
Is there a way to calculate transaction fees without having to go through cardano-cli? Maybe something like Blockfrost? or any other API providers? I don't want to run a local node to do that.
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Blockfrost API and cexplorer.io about an asset does not match
When I use Blockfrost to query all the address holders of a token named NMKR,
curl -s -H "Project_id: $BLOCKFROST_PROJECT_ID" https://cardano-mainnet.blockfrost.io/api/v0/assets/...
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What is supply.locked in the blockfrost API /network endpoint?
I have been working on a data analytics on Cardano using blockfrost. I am fairly familiar with Cardano tokenomics, but I have been wondering about the supply.locked data in the /network endpoint. Here ...
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