Questions tagged [blockfrost]
Anything referencing to Blockfrost API.
90
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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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1
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15
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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 ...
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1
answer
30
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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 ...
- 113
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39
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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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1
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20
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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....
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2
answers
45
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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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59
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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 ...
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1
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33
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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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1
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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,
...
- 41
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1
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71
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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 ...
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1
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47
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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
answer
57
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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 ...
- 3
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1
answer
58
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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/...
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1
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29
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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 ...
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2
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87
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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
answer
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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70
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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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3
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143
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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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1
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1
answer
61
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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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1
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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 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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126
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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
83
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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
vote
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 ...
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1
vote
2
answers
48
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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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vote
1
answer
36
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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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2
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1
answer
165
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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 ...
1
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0
answers
35
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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
35
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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 = `...
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2
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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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1
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1
answer
32
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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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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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3
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1
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110
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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 ...
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1
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1
answer
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 ...
2
votes
1
answer
43
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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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2
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3
answers
162
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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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2
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172
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How to get unused address for stake key via Blockfrost API
Using Blockfrost API, I can query a stake address, and receive known addresses that have "state=used" like when I query them on my local node via Cardano-Wallet.
I am interested in "...
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1
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490
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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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300
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How do I get wallet holders for a cnfts project?
I'm super new to cardano blockchain development. Today, I just have a chance to explore on blockfrost api. I've been trying to find an answer of the question that
Is there any public APIs out there ...
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How to store scripts using blockfrost?
Greeting!
I got that Blockfrost has API to get plutus script hash but how to store those scripts hashes?
P.S. if I got script hash, can I build and send transaction using script's hash and Blockfrost?
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1
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259
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How To Get All Transactions of Associated With an Address In A Given Interval?
okay so given some reciving address such as addr1qxq7k07cnt8vstdmygu7lpw0tyyssu4trs27qq6f7xjpmvrdrr3j8j5k5yacga4ckv6lnx4p0la57q7nf24eszqk0r2q9axgqv how can I use a service like BlockFrost (or any ...
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197
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How to convert Cardano Address?
Cardano has a number of different types of address from receiving address to enterprise address and many others.
My question is in two parts:
where can I find an exhaustive list of all address types?
...
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1
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63
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How to specify the Cardano address for BlockFrost Transaction Endpoint?
Hi im trying to call this https://docs.blockfrost.io/#tag/Cardano-Addresses/paths/~1addresses~1{address}~1transactions/get from some code I wrote (images attached below) and get a None or Empty value ...
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234
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Get Transaction History Given Policy ID using Blockfrost API
What's the best say to get the transaction history of an NFT collection given the policy id? I looked into Asset Transactions but this requires both policy ID and the asset ID. Is there something else ...
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2
answers
114
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How to get the history of an NFT or NFT Series from blockfrost?
Hi is there a quick API call to get the transaction history of a specific NFT or collection of NFTs in BlockFrost?
- 972
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2
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58
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How to Run A DB Sync Server On Daedalus?
So I have been trying to do some fun things with Daedalus, and realised I should be able to query the node from it. This makes me wonder how to set up a limited database / querying system for my own ...
- 972
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2
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89
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How to securely call Blockfrost or other API service from Smart Contract?
I just spent a few days trying to find a way to access account data from a smart contract using only plutus. Turns out IOG has yet to put that functionality in (at least that's how I understand it) ...
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210
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Error creating a transaction with Cardano Serialization Library
I am trying to create a transaction using the Cardano Serialization Library but I cannot figure out what is going wrong.
The code is
const BlockFrost = require('@blockfrost/blockfrost-js');
const {
...
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1
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2
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58
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How to get blockchain block load from blockfrost?
I'm currently going through Blockfrost documentation and trying to figure out if there is a way to fetch block load for each day.
Seems like they don't have such option, in that case: Is there a way ...
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