Questions tagged [api]
The api tag has no usage guidance.
60
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19
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Why did 0x swap API get deprecated and what is its substitute?
0x swap API was a great project that was under active development for several years. But recently it got deprecated and no longer kept up to date. I could not find any other substitute for it on the ...
- 444
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20
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Return the current ERC20 token holders and number of tokens held
Are there any free APIs available that can provide current data on ERC20 token holders and the number of tokens they hold ?
0
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answers
21
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getting reverted with reason string 'SWAP_CALL_FAILED' while trying back sell unitymeta Token
const unityMeta = '0xca861e289f04cB9C67fd6b87ca7EAFa59192f164';
const WBNB = '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c';
const params = {
sellToken: unityMeta,
buyToken: WBNB,
...
0
votes
1
answer
28
views
Safe Transaction API balance - returns 0 for fiatConversion for all tokens
I'm trying to fetch the safe address balance with the fiatConversion (USD) but it returns 0 for the all the tokens
https://safe-transaction-mainnet.safe.global/api/v1/safes/...
- 1
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19
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Is there an API for real time token values?
This is not a coding question so if this is the wrong place to ask it please advice where I can ask it.
I am looking for an API where I can get real time token values both on Sepolia and then also on ...
- 125
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votes
2
answers
159
views
Batch Token Swap using 0x
I'm trying to make a telegram bot that sells all the tokens available on a wallet using Ox API. In order to automate the process with only command, I'm okay with adding the private key to the script.
...
2
votes
2
answers
27
views
How can this account address selled more erc20 token then it received?
I'm using the Alchemy API to retrieve all transactions for a specific address. When I run the API for this address on this particular token, I only receive two transactions. The first transaction ...
0
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15
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0x Swap API Is there a recommended approach for handling these error responses uniformly?
Subject: Assistance Request for 0x Integration
Description:
Hello 0x Support Team,
I hope this message finds you well. I am currently in the process of integrating the 0x API into my project, and I've ...
- 1
0
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1
answer
27
views
What is Safe base API URL for Gnosis Chain?
What is Safe base API URL for Gnosis Chain?
Can't find any in the docs
Both
https://safe-transaction-xdai.safe.global
https://safe-transaction-gnosis.safe.global
don't work
1
vote
1
answer
36
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Building Cryptocurrency Tracking system for monitoring stolen cryptocurrency transactions
When hackers steal tokens from an account, what they generally do is divert the flow of tokens via multiple proxy accounts making it complicated for the cyber-forensics department to track final ...
0
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1
answer
19
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How to find the origin of the token/crypto in the wallet?
For example,
Wallet 0x...A1 has 0.5 ETH. I want to know about the origin of 0.5 ETH.
Can I get that data from the Etherscan API (what endpoint?) or another solution?
- 1
1
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181
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How to track ERC20 token creations on Ethereum blockhain with web3.js using Infura API?
I'm trying to fetch new ERC20 tokens from the blockchain transactions, my code is scanning the blocks and when I tried to log transactions it works well, (dumping bunch of logs). However I don't know ...
- 131
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1
answer
42
views
Given token id of ERC1155, how to find out how many copies of it are there?
This may not be possible to implement in an easy fashion via the standard calls only to blockchain, therefore I'd consider third-party API providers such as Alchemy.com
I'm aware of, let's say, ...
- 49
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21
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API for web3 projects features (wallets/portfolio)
I`m just curious to ask which API services for web3 projects features (wallets/portfolio) do you guys use ? (including ETH support too, of course )
2
votes
1
answer
150
views
How to get block and receipts data?
Is there a way to get the entire block information and transaction receipts within the block all in one function/method?
Irwing Tello
- 85
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4
answers
376
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2
votes
2
answers
119
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Ethereum RPC API
I am building an analytics dash for wallets, which constantly tracks balance changes for wallets. I am using this small snippet to get the balance
(async () => {
const provider = new ethers....
- 109
0
votes
1
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63
views
verifying smart contract using etherscan api?
I wanted to verify my smart contract from polygonscan api but when I use this code I always get a Module Error :
"Error! Missing Or invalid Module name"
and this is the code I am using in ...
- 1
0
votes
1
answer
71
views
Get signer for Blockchain API without private Key
I have a ERC-20 token and I have a smart contract to but and sell the tokens . I have also created frontend and API for this. In the frontend I get signer from the wallet but to do it in the backend I ...
0
votes
1
answer
59
views
How to query a contract function via Etherscan's API with uint256 input?
I'm trying to query this contract:
0x992678ad242230Dd795107Fee8B572E27083002A
and to get the "getglobalStakedTokensPerPeriod" (number 11)
with the unit456 of 1 (period 1)
I've tried to use ...
0
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0
answers
41
views
Request failed with status code 429
I've find a bot on Github and when I try to make it work, he do one or 2 request and I received the error: Request failed with status code 429
How can I fix that. The node that I use can received 1500 ...
- 1
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18
views
How to decode orca.so api response
I'm building my arbitrage bot with orca.so, when I try to fetch the price via their api this is the response:
{
"jsonrpc": "2.0",
"result": {
"...
0
votes
1
answer
58
views
Is it possible to create an OpenSea collection using their API?
I want to create a collection in OpenSea but using a php backend instead of using their platform.
Is it possible to do this? I have been looking at their API documentation and I haven't been able to ...
- 685
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152
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How to get hash and signature of payload parameters using java
I want to use openSea's api, but I don't know how to get the hash and signature of this json object using java.
https://docs.opensea.io/reference/create-an-order
{
"parameters": {
"...
- 11
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0
answers
11
views
Get all transactions on ethereum
Is there a way to get all transactions on ethereum such that transactions between two unique wallets will be counted as one ?
- 9
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1
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56
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Is private key sent out at any ocassion in a request to any RPC?
Do I understand correnctly that no RPC whether it be the standard Ethereum full node, or an RPC/REST API gateway, require a private key to be sent to it in the pure text? A private key is only used to ...
- 91
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2
answers
56
views
Can you setup a Chainlink function where the end user pays the LINK gas fee?
I was watching this video https://youtu.be/nKRZ1R2BC4Q. Chainlink functions look incredible. I have a Next.js app that I plan on integrating a Chainlink function. This Chainlink function will take the ...
- 361
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12
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What is the fastest and most cost effective way of converting liquidated BTC into a stable or wBTC during times of high volatility?
I could only find this related question:
How to swap BTC to WBTC
But this relates to reducing risk in finding a fast, automated way in times of likely, high volatility.
It needs to be automated using ...
0
votes
1
answer
55
views
What's the best way to open a wallet on behalf of the user?
I work at a gaming company and we are developing a Play2Earn game.
We want to make the UX as seamlessly as possible so we would to avoid having the players to open a wallet to initially receive their ...
- 685
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99
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why Seaport Opeansea testnets API return "null" for signature?
I am trying to retrieve offers detail using seaport API for a given asset contract for a given token ID but it returns null for the signature field.
My understanding is that this signature is the ...
- 607
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47
views
How can I interact with metamask extension via embedded javascript?
Let's say I am building browser based trading bot, which I want to be able to:
Be inserted to the page via extension or raw javascript code;
It will click here and there until MetaMask extension ...
- 1
0
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1
answer
482
views
Error on WebSocket connection
i want to retrive data from this websocket api,
where is my code
import { WebSocketServer } from 'ws'
let socket = new WebSocketServer('wss://ws.blockchain.info/inv');
socket.on('error', console....
- 1
0
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1
answer
299
views
Binance smart chain node API provider without billing per websocket response
I'm unsure if this is the correct place to ask but I thought I'd try anyway.
Problem
I want to build a Node.js application using the Web3 library. The application should collect prices on liquidity ...
- 1
0
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1
answer
345
views
How can I get a list of all blocks proposed by a validator?
I would like to get all blocks proposed by a given validator. It looks like this functionality is not available in the standard Beaconchain API. Is there any other API available, probably by a a third ...
- 910
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1
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63
views
Does Moralis "Get NFTs by Wallet" API support ERC-1155?
I am using this service from Moralis to retrieve all the NFTs that a wallet has.
Does this support ERC-1155? I know these tokens are semi-fungible so they are not exactly NFTs, but I was hoping I can ...
- 685
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1
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43
views
Query pancake swap staking contract
I've been trying to find information on how to query pancakeswap's staking contract for some time now, and I've unfortunately been unsuccessful this far.
I was wondering if anyone would be so kind as ...
- 1
1
vote
1
answer
94
views
Is there a RPC API equivalent of fetching my Ethereum balance by using CURL in the cli?
Since metamask connects to a RPC server and passes in the eth address to make a api request. Is it possible to do the same functionality using CURL in the cli to do a basic balance inquiry of an ...
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1
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2
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34
views
I need an API that gets "input data"field from the blockchain
See image for the field I'm trying to get the data from, I can decode it myself, but I can't download the entire blockchain so how do I access the "input data" field? Would an API be the way ...
- 137
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1
answer
164
views
Missing personal api in geth JS consoole
so I installed geth. and launched the genesis terminal after initializing my genesis block. I needed to run the personal.newAccount() command, but the personal api is missing. My colleague had the ...
- 1
0
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2
answers
530
views
How do you return the market cap of an ERC20 token?
After an ICO, a token contract has essentially converted ethers into a token through the minting process.
Once this token’s initial supply has been minted, how do you call the blockchain to return the ...
- 499
0
votes
1
answer
443
views
How to Get All NFTs Owned by an Address on my custom blockchain
on mumbai lets say, i can use the alchemy sdk, where i input the network name and then call the functions easilly,
however if the network is testnetwork with a chain id of 1234 and public RPC of : &...
- 68
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10
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Issues regarding retreiving ERC 721 Transactions and them not showing up on the API action=tokennfttx endpoint
I'm currently attempting to retreive ERC 721 Transactions with Etherscan's API for a wallet and the most recent transactions are not showing up.
The request I am pushing is the following :"https:/...
- 11
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153
views
How to connect web3.py and fastAPI?
I am new to this. So how do I will return the value from web3.py. then, how to connect with fastApi?
- 11
2
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3
answers
663
views
DEX Real-Time Data
I have a project that tries to retrieve real time data from UnisWap V2 and SushiSwap I have already figured out how to get real time data from Sushi using api but it's not the same for Uniswap API ...
- 31
2
votes
1
answer
270
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Etherscan API get Tokens Transferred Information
I'm using etherscan, polygonscan API to get all the transactions from a contract.
My goal is to calculate how much money was transacted between sellers and buyers for a certain collection.
At the ...
1
vote
0
answers
196
views
NomicLabsHardhatPluginError: The Etherscan API responded with a failure status
**successfully deployed. but in vs-code giving this error. how to slove this ?? **
NomicLabsHardhatPluginError: The Etherscan API responded with a failure status.
The verification may still succeed ...
0
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1
answer
59
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Is there an api that compiles solidity contracts?
I have a static webpage and it should remain static. In this website a user generates solidity files. I would like to compile them by sending the uncompiled solidity via an api to a compiler and then ...
- 297
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1
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73
views
get back the parameter in fulfill function
i have a contract that inherits from ChainlinkClient to send requests to an API,
this contract have 3 main functions :
function onTokenTransfer(
address _sender,
uint256 _fee,
bytes ...
- 328
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3
answers
214
views
Getting NFTs of an address in a specific collection
I am using Alchemy API to handle fetching NFTs and their metadata in my platform. It has valuable methods, such as retrieving all issued NFTs of a collection or all owned NFTs of an address within a ...
- 382
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2
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900
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Can you fetch the whole transaction history of specific contracts somewhere?
I know you can validate the data of specific tx hashes using web3js or the etherscan api.
But is there a service which allows to query all transactions performed by or connected to a specific smart ...
- 179