Questions tagged [alchemy]

Used for questions related to Alchemy, a Web3 developer platform that provides supernode infrastructure, enhanced APIs, and other building and monitoring tools for building decentralized blockchain applications.

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sending a transaction requires a signer (operation="sendTransaction", code=UNSUPPORTED_OPERATION, version=contracts/5.7.0)

import React from 'react'; import './App.css'; import { useState, useEffect } from 'react'; // import { ethers } from 'ethers'; import contract from './RPSLS.sol/RPSLS.json' const { ethers, ...
Indul's user avatar
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140 views

"Error happened while trying to execute a function inside a smart contract" after trying to call smart contract function with fork ethereum chain

I am forking Ethereum blockchain using Alchemy's api. Below is my chain config module.exports = { solidity: { compilers :[ {version : "0.8.17"}, {version: "0.8.4"}...
Rohit Goyal's user avatar
1 vote
1 answer
32 views

How to fix invalid sender error using alchemy-sdk?

Trying to send a transaction with Alchemy-sdk, but I keep getting invalid sender. What am I doing wrong or missing, code below: My provider is created using ethers.providers.JSONRPCProvider(...
Maniac_1979's user avatar
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Why would my deploy.js return this? Error: factory runner does not support sending transactions (operation="sendTransaction"

I'm using Alchemy API with Hardhat and every time I run the deploy script I get the above error. I am also getting requests to my API every time I run this and the method is eth_accounts, in the ...
Meltxx's user avatar
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1 answer
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Error: factory runner does not support sending transactions (operation="sendTransaction", code=UNSUPPORTED_OPERATION, version=6.7.1)

I have run into the above error trying to deploy my contract. Running npx hardhat scripts/deploy.js. Here is the deploy.js: async function main() { const Test1 = await ethers.getContractFactory(&...
Meltxx's user avatar
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2 votes
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RPC endpoint for production environments

Context For testing environments, I'm spinning up AWS instances with App-chain client nodes and using the AWS ALB to access the exposed RPC endpoint. It is protected by the security group rules, so ...
quantumdust's user avatar
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69 views

Must be authenticated error using Alchemy RPC URL

I am getting this error Error: (code: -32000, message: Must be authenticated!, data: None) When running this command forge script script/DeploySimpleStorage.s.sol --rpc-url $SEPOLIA_RPC_URL --...
Basho's user avatar
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152 views

Alchemy API: How to get transaction history including failed and pending transactions for a specific wallet address?

In React I'm building a transaction history screen to list succeeded, failed and pending Polygon transactions. Using alchemy_getAssetTransfers I can retrieve the transaction history for a specific ...
Operator's user avatar
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2 answers
51 views

version problem in hardhat

const hre = require("hardhat"); // Returns the ether balance of a given address. async function getBalance(address) { const balanceBigInt = await hre.ethers.provider.getBalance(address); ...
Indul's user avatar
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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?
77ay's user avatar
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Error with Sepolia Faucet - ReCAPTCHA not Recognized Despite Correct Completion

I am facing an issue while using the Sepolia Faucet provided by Alchemy through sepoliafaucet.com. Every time I try to access the faucet and complete the ReCAPTCHA, I encounter the error message, &...
Ibrahim Khalil's user avatar
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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, ...
Nondi's user avatar
  • 49
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81 views

Alchemy Account Activity webhook not firing for internal transfers

According to the webhook docs when listening for account activity on an address it should include internal transactions. I'm not seeing any though. For example when i list a NFT for sale on OpenSea ...
Madbreaks's user avatar
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23 views

Forking Polygon PoS with hardhat + Alchemy Failing with Connection Timeout Error

I am trying to fork the Polygon PoS with Alchemy and it gives me the error of timeout while my internet connection is pretty good. I don't know why sometimes it runs successfully and sometimes it ...
Ajay Yadav's user avatar
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26 views

Test networks not working

I am using Hardhat, Alchemy and Goerli to test my SC. But for some reason NONE of my txns go through. They are all stuck in "Pending" within Alchemy. I have tried both Goerli and Sepolia ...
JaySnel's user avatar
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35 views

Alchemy getAssetTransfers function doesn't return all transactions

I am using alchemy and axios to get all the transaction history for an address Here is the code: var categoryList = []; categoryList.push("external"); categoryList.push("internal");...
Fariha Abbasi's user avatar
1 vote
0 answers
132 views

Why Alchemy responds eth_getBlockByNumber with wrong data

Network: Polygon Mainnet. I am using the Alchemy RPC in the following manner: I listen for new blocks and then retrieve block data, including transactions, based on the block number. However, today my ...
Alexandr Kalashnikov's user avatar
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107 views

Trying Uniswap V3 Swap Example - Error: Transaction reverted: function call to a non-contract address

Have been getting bellow error message: SwapExamples swapExactInputSingle: Error: Transaction reverted: function call to a non-contract account at SwapExamples.swapExactInputSingle (contracts/...
EMintela's user avatar
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15 views

How to get list of all NFTs owned by a EOA in a specific collection

I want to get all the NFTs an EOA owns in a specific collection but I found that none of the SDKs like Alchemy, Infura, etc provides this feature. So how can I do that?
Rishabh Raghwendra's user avatar
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153 views

I am Getting this error ProviderError: Must be authenticated!

ProviderError: Must be authenticated! at HttpProvider.request (/workspaces/Decentralized-Voting-Application-on-Ethereum-Blockchain/node_modules/hardhat/src/internal/core/providers/http.ts:88:21) ...
AmariS1's user avatar
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i got a ParserError: Expected '(' but got identifier while using Hardhat

I got this error in the terminal while running the npx Hardhat compile I've tried looking at the other examples of the error Stack Exchange but none have been able to provide a fix for my issue. ...
Head Office's user avatar
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60 views

How to create `ee-jwt-secret-file` for Teku node with Alchemy

I am looking to run a Teku node, but instead of connecting it to my own execution client, I'm looking to connect to a node as a service. Is this possible How do I create a ee-jwt-secret-file from ...
Patrick Collins's user avatar
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24 views

How to set owner wallet into useState from router.query?

I'm trying to set the address of a connected wallet into useState as string so that another function can use it to run it's function. const router = useRouter(); const { walletAddress } = ...
Miles Donald's user avatar
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1 answer
89 views

Using connected wallet to fetch all NFTs using alchemy sdk

I'm trying to pass the user's connected wallet into getNftsForOwner function but am not sure how to do it. If I type out the address into the function like this: const NFTs = await alchemy.nft....
Miles Donald's user avatar
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1 answer
358 views

Ethers.js Batch Fetch Archive Transactions by Hash

I have a big array of emitted events that I retrieved using an archive node with Ethers queryFilter. I want to get the transaction parameters for each of those transactions. I am using Ethers.js await ...
Adam's user avatar
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1 answer
253 views

Derived contract must override function "supportsInterface". Two or more base classes define function with same name and parameter types

TypeError: Derived contract must override function "supportsInterface". Two or more base classes define function with same name and parameter types. --> royalty.sol:9:1: | 9 | contract ...
soumyadeep.eth's user avatar
1 vote
0 answers
23 views

How to filter smart contracts via method signature

is there anyone here who is an expert on dune/ethereum etl/alchemy? the question is - i'm doing research and want to find a quick way to query all smart contracts that implement/have called a certain ...
bilbob2392's user avatar
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19 views

const { walletAddress } = req.query not passing wallet address to alchemy api

Alchemy api isn't recognizing the wallet address given by req.query. Not sure why. I tested it using Moralis api and it worked fine. Is this a known issue or is there a better way to input the ...
Miles Donald's user avatar
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1 answer
120 views

CORS policy error when trying to render image from pinata ipfs

pinata.js file const FormData = require("form-data"); export const uploadJSONToIPFS = async (JSONBody) => { const url = `https://api.pinata.cloud/pinning/pinJSONToIPFS`; //making ...
soumyadeep.eth's user avatar
0 votes
1 answer
36 views

how to receive values from openzeppelin royaltyInfo function

trying to implement like this uint[2] memory royalty = royaltyInfo(_tokenId, price); payable(royalty[0]).transfer(royalty[1]); but getting error TypeError: Different number of components on the left ...
soumyadeep.eth's user avatar
0 votes
0 answers
49 views

Wrong simulated univ3 swaps using Alchemy alchemy_simulateExecution API

we are using your API endpoint alchemy_simulateExecution , but for some reason we seem to receive wrong values here. for example check this tx: ...
Atrox's user avatar
  • 21
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1 answer
649 views

Problem in getting test ethers from sepolia faucet by alchemy

I am getting error "Sorry! To be fair to all developers, we only send 1 Sepolia ETH every 24 hours. Please try again after 24 hours from your original request." on sepolia and mumbai faucets ...
Siddhartha Sahu's user avatar
1 vote
0 answers
86 views

Unable to run concurrent contract executions on polygon mainnet (Alchemy)

I'm currently encountering a peculiar issue on the Polygon Mainnet, which doesn't seem to occur on the Testnet. When running two or more parallel node processes which have two different wallets with ...
Rakesh Bhatt's user avatar
2 votes
1 answer
256 views

Why is Alchemy eth_getLogs not finding event logs for AaveV3 Supply events?

I have created a Node project that connects to Alchemy via ethers. I am trying to capture all Supply events for AaveV3 However, when I use the getLogs function, and use the contract address as the ...
Oscar Chambers's user avatar
1 vote
1 answer
47 views

before all" hook for "should allow a purchase" error - Chainshot

I am completing series of tutorials on chainshot. Now I am on events 4. - Sale and I am getting an error "before all" hook for "should allow a purchase" and I don't have an idea ...
rad2's user avatar
  • 13
2 votes
2 answers
95 views

TypeError: Member "push" is not available in uint256[] memory outside of storage

// SPDX-License-Identifier: MIT pragma solidity 0.8.4; contract Contract { function filternEven(uint[] memory arr) external pure returns(uint[] memory a){ for(uint i=0;i<arr....
No Brain's user avatar
1 vote
2 answers
109 views

getting error as deploy file not found

require('dotenv').config(); require('@nomicfoundation/hardhat-toolbox'); const API_URL = process.env.API_URL; const PRIVATE_KEY = process.env.PRIVATE_KEY; const API_KEY=process.env.API_KEY console....
ATHUL SURESH's user avatar
1 vote
1 answer
53 views

Etherjs "contract.on" method in Reactjs to read events not loading on console

I am trying to display the events that are emitted from a function in my smart contract to the front end of my dApp, and I feel like I am missing a step in the connection process with my dApp. I've ...
OhItsPM's user avatar
  • 75
1 vote
0 answers
79 views

Alchemy notify slack webhook not working properly

I'm trying to get notifications on an address piped to slack, and Alchemy apparently has a free tool for this, but I can't get the webhook to work. Copied it directly from the slack app, but the tests ...
scheherazhaad's user avatar
2 votes
1 answer
175 views

How to find total value in ETH of all NFTs owned by a user

I am aware that we could find all the NFTs owned by a user using alchemy’s NFTs API. However, I was wondering if there was a way to them compute the value of that particular users portfolio.
datasleuths8648's user avatar
1 vote
2 answers
1k views

Insufficient funds when trying to deploy smart contract at goerli test network with alchemy

When I run the command "npx hardhat run scripts/deploy.js --network goerli" it gives me the error Error: insufficient funds for intrinsic transaction cost. More specifically looks like this:...
User G Amsterdam's user avatar
1 vote
1 answer
484 views

reason: 'execution reverted: Not enough ether to purchase NFTs.', code: 'UNPREDICTABLE_GAS_LIMIT',

I am attempting to deploy a smart contract to the Sepolia testnet. I currently have ~1 Sepolia eth in my wallet. I am using Hardhat and Alchemy and I am following this tutorial Here is my code for ...
That_Coder's user avatar
1 vote
0 answers
96 views

How Can I get both Incoming and Outgoing transactions from "getAssetTransfers" inside one request?

I'm working with alchemy's SDK. And as per the Alchemy SDK documentation, it says we can get all the transactions like this: const config = { apiKey: "<-- ALCHEMY APP API KEY -->", ...
MDIPANJAN's user avatar
4 votes
1 answer
282 views

If `provider` is essential in communicating with the blockchain, how is this following code working?

Here is the smart contract code: // SPDX-License-Identifier: MIT pragma solidity 0.8.19; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; interface Bucket { function drop(...
amit's user avatar
  • 380
2 votes
1 answer
824 views

Can someone explain me providers and the different types of it?

I can make providers using ether-hardhat, alchemy, and metamask. What is the difference between these?
amit's user avatar
  • 380
2 votes
1 answer
194 views

Does Alchemy support batch requests for getAssetTransfers?

I am trying to make a batch request for getAssetTransfers endpoint. However, when I try to do this, I get this error: jsonrpc: '2.0', id: 1, error: { code: -32600, message: '...
bison's user avatar
  • 21
1 vote
1 answer
242 views

Not able to send transaction using alchemy sdk

Hey i have to build a ERC20 contract and using alchemy sdk to send transactions onchain For eg mint or burn tokens. But i am not able to send a transaction as its showing an error of cannot estimate ...
Yakshesh Gupta's user avatar
2 votes
1 answer
82 views

Is dedicated gateway a need for marketplace projects?

I am developing an NFT marketplace. It has a section showing images of NFTs ( NFTCards with some information ) of a specific contract address. Since the number of minted NFTs by the contract is high, ...
Sina Rahimi's user avatar
1 vote
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 ...
Sina Rahimi's user avatar
1 vote
1 answer
128 views

Decode eth_call transaction

How to read "data params" and "value result" from eth_call method on Alchemy explorer ? thanks.
adam mr's user avatar
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