Skip to main content

Questions tagged [blockfrost]

Anything referencing to Blockfrost API.

Filter by
Sorted by
Tagged with
0 votes
0 answers
12 views

Can we calculate transaction hash from the data?

Can we Calculate the transaction has from the data that we receive from blockfrost. I would like to compare the transaction hash (already present) with the has calculated from the data from Blockfrost ...
Rahat's user avatar
  • 1
0 votes
1 answer
16 views

How to find the last time an asset was transferred from one wallet to another

Sounds easy enough to do with something like Blockfrost but the best method I could find involved many API calls to different endpoints. It doesn't sound like something that should be too hard so ...
Jack's user avatar
  • 1
0 votes
0 answers
35 views

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 ...
na Ha's user avatar
  • 1
0 votes
1 answer
26 views

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 ...
Mik_A's user avatar
  • 101
1 vote
1 answer
43 views

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 ...
dee's user avatar
  • 113
0 votes
0 answers
53 views

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 ...
Emad Panah's user avatar
0 votes
0 answers
37 views

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 ...
Thomas's user avatar
  • 1
0 votes
1 answer
41 views

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....
youreachedRahat's user avatar
0 votes
2 answers
73 views

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 ...
0x6f6b's user avatar
  • 27
0 votes
2 answers
113 views

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 ...
Firing Dev's user avatar
0 votes
1 answer
37 views

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.
Firing Dev's user avatar
0 votes
1 answer
214 views

Transaction submit error MissingVKeyWitnessesUTXOW

I am @emurgo/cardano-serialization-lib-nodejs to submit transaction in cardano. I am getting following error. Transaction 5c98317bc6caf027b91e807ed1cdd78571b8f9a791202b5feff5b32fa5f71f1f rejected, ...
Heindrick's user avatar
0 votes
1 answer
92 views

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 ...
user9232's user avatar
0 votes
1 answer
57 views

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 ...
dpd's user avatar
  • 3
0 votes
1 answer
80 views

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 ...
dpd's user avatar
  • 3
0 votes
1 answer
72 views

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/...
Myles's user avatar
  • 321
0 votes
1 answer
40 views

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 ...
kannastor's user avatar
0 votes
2 answers
109 views

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: &...
Kostia's user avatar
  • 1
0 votes
1 answer
78 views

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 ...
Badro's user avatar
  • 3
0 votes
1 answer
106 views

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 ...
Andre Morais's user avatar
0 votes
3 answers
176 views

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 (...
duaa azhar's user avatar
1 vote
1 answer
66 views

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 ...
Heindrick's user avatar
0 votes
1 answer
29 views

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
professor moriarty's user avatar
1 vote
0 answers
48 views

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 ...
cdt's user avatar
  • 121
0 votes
1 answer
171 views

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 ...
Heindrick's user avatar
0 votes
1 answer
99 views

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 ...
Heindrick's user avatar
1 vote
2 answers
323 views

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 ...
AmirhN's user avatar
  • 13
1 vote
2 answers
51 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.
Heindrick's user avatar
1 vote
1 answer
37 views

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 ...
Heindrick's user avatar
2 votes
1 answer
196 views

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 ...
Franklin McMillan's user avatar
1 vote
0 answers
46 views

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: {...
anton melnychuk's user avatar
1 vote
1 answer
39 views

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 = `...
Bzzard's user avatar
  • 33
2 votes
2 answers
75 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: { "...
Bzzard's user avatar
  • 33
1 vote
1 answer
43 views

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 ...
Maldy's user avatar
  • 58
1 vote
1 answer
116 views

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. ...
yousuke's user avatar
  • 11
3 votes
1 answer
133 views

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 ...
Maldy's user avatar
  • 58
1 vote
1 answer
36 views

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 ...
Renan Valentin Ferreira's user avatar
2 votes
1 answer
46 views

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/...
cdt's user avatar
  • 121
2 votes
3 answers
195 views

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.
Attilah's user avatar
  • 431
0 votes
2 answers
188 views

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 "...
RelevantData's user avatar
1 vote
1 answer
604 views

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?
RelevantData's user avatar
1 vote
1 answer
344 views

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 ...
Michael904's user avatar
0 votes
1 answer
70 views

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?
Nazar Mineev's user avatar
2 votes
1 answer
323 views

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 ...
KryptoKing's user avatar
0 votes
1 answer
222 views

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? ...
KryptoKing's user avatar
0 votes
1 answer
71 views

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 ...
KryptoKing's user avatar
0 votes
1 answer
276 views

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 ...
MitandGrit's user avatar
0 votes
2 answers
122 views

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?
KryptoKing's user avatar
1 vote
2 answers
70 views

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 ...
KryptoKing's user avatar
0 votes
2 answers
95 views

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) ...
KryptoKing's user avatar