Questions tagged [data]
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45 questions
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Exploring Solutions for Enhanced Data Storage in Ethereum Wallets
Vitalik recently raised an important point about the need for robust data storage solutions in crypto wallets https://vitalik.eth.limo/general/2024/12/03/wallets.html. Chris Were, the CEO and co-...
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access daily pending txs historical data
I am an academic researcher in finance, currently working on Txs Fees on Ethereum. I am looking for a database where I can find the daily number of pending transactions on Ethereum over a large amount ...
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44
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How to identify swap transactions?
Is there a way to identify all swap transactions of a token pair?
So this would involve CEX, DEX, direct swaps, and other forms I am not aware of.
Of course, this can be complex involving many ...
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Redundant byte offset requirement in the Contract ABI Specification?
I've had the pleasure of finding out that, contrary to what I've been used to in the other byte-transferring/-interpretation systems (e.g. the C/C++ languages, the communication protocols, etc.), ...
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How to access transaction data in Alastria networks?
I have read an article about a personal data leak on Alastria networks: https://medium.com/@4k-research/personal-data-leak-alastria-blockchain-ecosystem-9366544d1cd9. Following the article idea I have ...
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Smart Contracts data for a thesis on commodity trading
I am considering writing my master's thesis in finance on smart contracts and commodity trading. I would like to conduct an analysis on the trading behavior of smart contracts as opposed to ...
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137
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Bridging On-chain Data with LLM Models: Retrieving Token Information (Solidity + GPT)
I'm developing a Solidity token and exploring ways to leverage Large
Language Models (LLMs) like GPT to answer user queries about the
token's data directly within the application. Ideally, I'd like ...
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53
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PDF direct to blockchain?
So firstly I'm just going to preface this with the disclaimer that this is an educational exercise, I understand that the gas fees would be ridiculous. This is for a project, not to ever deploy to ...
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51
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Why a zk-rollup should provide data availability given it can use zkp to prove correctness?
The whole idea behind zkp is to prove correctness of the result of a computation without actually disclosing the inputs that you might want to keep secret. So why in the context of zk-rollups it is so ...
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Solidity large data handling
I’m currently doing a solidity project where users can create crowdfunding campaigns and others can participate financially to them.
Each campaign is defined by a struct containing basic informations ...
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225
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Comparison of NEAR and Celestia Data Aavailability Approaches? [closed]
Recently NEAR has come up with a Data Availiabity approach which they claim to be far more superior to a lot of existing techniques. Celestia DA leverages 2D Erasure Coding based Data Availability ...
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how to get data about all tokens on the ethereum chain
I want to get data about all the tokens that are on the Ethereum chain without specifying the address of each token, how can I do this?
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How to parse the input data from the 'More Details' section of a transaction into an Excel Spreadsheet
I wonder if anyone can assist please? I have searched the forum but I cannot find anything that answers my specific question.
I'm trying to parse the input data from transactions on the following ...
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61
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How to do data analytics on-chain
as I understand it, data analytics (like calculating averages etc) on blockchain data is usually done off-chain (ie. you obtain data from the blockchain via say a third party API call or directly from ...
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Best approach to simplify phantom array logic (ERC721 Enumerable) [HARD]
I wanted to create an ERC721 token vault with arbitrary numbers of NFTs pre-"minted", yet compliant with IERC721Enumerable as a proof-of-concept.
For simplicity, the NFT ids are contiguous. ...
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How can I access the 3rd argument of _safeMint?
I am minting an ERC721 using _safeMint and I am setting the 3rd argument to a string. I want to be able to access this data argument using the transaction hash or whatever I have to access the ...
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can I get market data from chainlink and how?
I need to get price market cap and price change of cryptos do you know any free plans and how what limitations do they have?
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Specific Block Data?
How can I get data from a specific block in the past? Does node providers support archive node? Any suggestions are welcome.
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322
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What are the GraphQL API providers for blockchain data?
I know there are RPC providers like QuickNode and Alchemy
Irwing Tello
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How can I decode the emitted event data field using Foundry Cast in Ethereum?
I'm trying to extract relevant information from the event but I'm not sure how to decode the emitted event data using cast. Any tips or resources would be greatly appreciated. Thank you!"
E.g for ...
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"How to limit the function call for all users except those who have a special token with the address 'X'?"
hi i'm continuing to explore solidity. I wrote a contract which contains 4 functions: addAuthorizedAddress, removeAuthorizedAddress, storeData, retrieveData. The last two: storeData and retrieveData ...
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434
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What's the best way to verify an address is correct in C#?
Is there an easy way to validate an Ethereum address in C#?
Basically, I am looking for the method that correspond to these ones in Javascript but in C#.
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79
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Is there a way to enable logs for graph commands?
I am running the following version of graph-cli: @graphprotocol/graph-cli/0.42.4 linux-x64 node-v18.15.0
Is there a way to setup a log or have more details after each command gets executed?
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1
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696
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Best way to store private data in smart contract
I wanna to store some personal data as a string to my smart contract with simple store function like a note:
mapping (address => string[]) private addressToNotes;
function store (string memory ...
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2k
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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 ...
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192
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contracts being deployed via 0x61088480
Lately I am coming across different deployment tx data patterns. I am already familiar with how the free memory pointer is shifted from the usual 80 when there are immutables in the code (great ...
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Which one is gas efficient?
Lets say i want to store some data about each address ,through the mapping.
My first idea is: store in struct this way:
struct user {
address userAddress;
uint256 someUint:
string someString;
...
- 360
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250
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Comparison of gas cost in different types of data storage
I want to compare gas fee of different types of data includes: String, bytes, uint, bool, int, address and etc... does anyone knows how much they costs? or share a link about this?
Thank you
- 360
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Contracts design
I have a project where users deploy their own instances of a contract and those instances need off-chain data through chainlink oracle, what's the best between making the contract has its own request ...
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1
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123
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call a function in the same contract
i have a contract who containt a function onTokenTransfer(address _sender, uint256 _fee, bytes memory _data), when i transfer some ERC-20 Token using ERC-677 function transferAndCall, the function ...
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ERC677 transferAndCall
i want to send some LINK to a contract B from a contract A, and in the same function call a function in contract B, im using transferAndCall(address _to, uint _value, bytes _data) function in the ...
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What field is used to pass on transaction information? input field or data field?
In the documentation here under the eth_sendTransaction, it shows/states that in the transaction object sent, there is an input field.
But in the documentation here it says there is a data field.
My ...
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How to fix decoding transaction data giving wrong output in ethers-rs?
I am trying to decode the hex data of a transaction. For testing purposes I am using the transaction that can be found here https://kovan.etherscan.io/tx/...
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How do you find every self-destructed contract using geth?
I'd like to use my go-ethereum node to find every self-destructed contract in the history of Ethereum and get their addresses.
What is an efficient way to do so?
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Are there any data sets available for download of all addresses that have been used?
Since etherscan indexes all addresses that have been involved in any transaction i was wondering if such a data set is available for download anywhere?
I cant find anything on etherscans website and ...
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How data is being retrieved from the blockchain using only the address of a smart contract
Sorry if I didn't fully clarify the question; it was quite challenging for me to do so.
This is a smart contract
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract GameItem {
...
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197
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Accessing historical data for validators from the API
I have been trying to pull the validator-level data for ETH for a project I am working on. I am using this API and have been unable to find a command I need. Ideally, the request URL would either ...
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Wallet mobile app that allows sending transactions with data to smart contracts on BSC?
I have tried about a dozen crypto wallet apps on Android, including Metamask, and I haven't found a single one that:
supports BSC (BNB Smart Chain)
allows me to manually initiate and send a ...
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how to get NBA data
Hello everyone I need NBA data in my smart contract so I used some chainlink jobs but they don't provide specific data about the teams or players , is there any node that can help ? or is there ...
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How to make Enums scalable? [duplicate]
Let's say that I have a contract Games.sol containing an enum with multiple games.
enum { TicTacToe, PacMan, Chess }
This enum is currently imported from a library and I think that it's immutable, so ...
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Is there a particular reason as to why evm adresses are only 160 bits and not 256 bits? [duplicate]
Is there a particular reason as to why evm adresses are only 160 bits and not 256 bits?
Wouldn't that create a pigeon hole problem eventually? Is this solely to save 96 per addresses so to decrease ...
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Can I integrate files within a smart contract?
I want to create a smart contract, let you use files like docx, doc, pdf etc. with the reason of keep those files in the smart contract system and use them when the users of the smart contract ...
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Retrieve a non-constant/non-view transaction's return (output) data with hardhat/ethersjs
I'm trying to figure out if it's possible to retrieve the return value of a non-view function. Specifically, I want to see the return value of a newly created contract
I have created a simple setup to ...
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How to get smart contract data from certain block? [closed]
I need to get data from a smart contract.
How can I get historical data for smart contract ordered by block?
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Where is the state data stored?
This question was asked on Reddit a while ago:
Where is the state data actually stored though? On the hard drive of each node? Separate from or within the blockchain?
— Reddit: Basic ...
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