Questions tagged [transactions]

The term "transaction" is used in Ethereum to refer to the signed data package that stores a message to be sent from an externally owned account.

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Any way to call contract function without showing in transactions on ethscan/bscscan?

I'm trying to figure out how a particular smart contract (or set of contracts) is operating. It seems to be executing a function but the function call never shows up as a transaction on bscscan (yes ...
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How does an ethereum node validate the execution of a contract?

I would like to know how ethereum nodes validate the execution of a smart contract in a transaction. Do they all execute the same transaction to validate that their output is correct? For example, let'...
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How Do I Find Matching Ethereum Transactions Based On The Amount Of Ethereum Sent?

I am trying to locate a specific transaction on the Ethereum blockchain. I know the approximate amount which was sent, and that it was sent in 2019. I do not know the from address, to address, hash, ...
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How to read ERC1155's SafeTransferFrom() transactions in golang?

Trying to read ERC1155 SafeTransferFrom events, in golang. Here is what I tried: var ( // erc 1155 logSafeTransferFromSig = []byte("SafeTransferFrom(address,address,uint256,uint256,...
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When to use .call and abi.encodeWithSignature when calling external function and when not to

Can anyone tell me why sometimes you have to us the .call method and abi.encodeWithSignature when you want to call a function on an an external contract (First example below) and other times you can ...
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Transactions with my contract are older than the contract itself

I have recently started my blockchain development journey and I can't seem to find an answer to my question. I have deployed a new contract (the same way as I did a few before) on 19.09.2022 13:25 yet ...
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Broadcasting a transaction to be included in the next block

Since the merge we have predictable block times of around 12-13 seconds. I want to broadcast my transaction in a way that it is highly likely to get included in the next mined block, e.g. the block ...
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getting invalid sender error while send transaction

i try to create and sign transaction externally: var signer = new HSMSigner(walletName, Session); var rpcClient = new RpcClient(new Uri("https://rinkeby.infura.io/v3/{***}")); ...
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Can I roll multiple transactions into one?

I wonder whether it is possible to roll multiple transactions into one transaction and post it on the chain, similar behavior to L2 chains. I will have a smart contract where there might be a high ...
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Where are the docs on transaction filtering?

Say we have a user that tries to make a fake transaction. Where are the docs regulating how it is checked before it is fitted into block (pre and post PoS consensus merge )?
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Why creating ERC20 tokens instead of using ETH?

I have made an online web app which executes a process only if a transaction on the Ethereum blockchain is made. As I was developing my initial thought was to create an ERC20 token so that whoever has ...
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is there anyway I can get all nft transaction for certain nft collection address?

I'd like to get sales transactions(e.g. "Atomic match" or "Transfer from") for certain nft collection like bayc, preferrably on python. I tried several methods like using smart ...
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Private network load testing script help

I'm trying to write load/stress testing scripts for a private network. However, in doing so I remembered the nonce is going to be an issue for a basic NodeJS automation script. I'd like to send a ...
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Is it proper to estimate the throughput of verification from gas limit?

EIP-2537 says pairing of k pairs cost 23000*k + 115000 gas. Gas limit per block is 30M gas, and (30M-115000)/23000 is about 1299. Does it mean that there can be at most 1299 transactions to be ...
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Tracking ip in etherscan

How do you find ip address in an ethereum transaction/etherscan? My ledger wallet was recently compromised and the tokens in my wallet were stolen. Is there anyway i can track the ip address in ...
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Changing flow of Chainlink callbacks to save gas paid in LINK

I'm currently developing a project using Chanlink. I'm thinking of changing flow from 2 to 3 steps, because step 2 takes ~200k gas. User sends transaction to contract and wants to mint NFT. Here goes ...
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Does Hyperledger Besu limit the amount of data in a transaction?

I need to send transactions to a private PoA Ethereum Blockchain. I know by geth source code it is limited to 128 KB: txMaxSize = 4 * txSlotSize // 128KB -> tx_pool.go file: https://github.com/...
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How Web3 send a token transaction? [Newbie question]

I'm a bit new to Web3, and have a serious job to build a multi-chain wallet Already know the basics, create wallet or account with Web3 (BTW don't know the difference) anyway, I'd like to know how to ...
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Is there a way to find out the first transaction sent TO an account?

Is there a way to find out the first transaction sent TO an account? Hey everyone, I know that given an address, I can check if a given transaction is the first tx.from by checking its nonce. Nonce == ...
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Is there a way to mint several ENS at the same time?

I'm looking to mint 2 ENS at the same time to avoid paying the fee twice. Is that something possible ? Have a wonderful day :D
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Fork of geth - activate mining ONLY when there's transaction(s) that've come from a certain wallet/address. How?

This may be a fork of geth, or any other node client, or a tweak in its functionality: I want to be able to activate mining process only when, and if, there have come transaction(s) from a certain ...
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Where are the blockchain transactions stored?

I'm studying the block structure in several blockchains like Bitcoin or Ethereum. When I started to read about blockchain, many sites and books said that transactions are stored in blocks. Ok, I got ...
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Is visa's TPS very low at only 1700 [closed]

I am analysing various blockchains to better understand advantages/disadvantages. I recently cam across the comparison of Solana to Ethereum in terms of TPS; with Solana being able to process 500 TPS ...
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Is there a way to get wallets that made their first ever transaction less than 24 hours ago?

Is there a way to get wallets that made their first ever transaction less than 24 hours ago? I'm looking for a way to screen for all addresses that have made their first ever transaction within the ...
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How to obtain a list of addresses of 'fresh' wallets?

How to obtain a list of addresses of 'fresh' wallets? Hi everyone, how do I go about extracting a list of wallets that had their first transaction within the past 24 hours? I know that wallets are ...
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Calculating TPS with gas

As part of a project I need to get an estimated TPS value for a handful of Blockchains. Can you calculate TPS from gas alone? for example: TPS = (Gas Limit / Gas used) / block time
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Is it possible to prevent uniswap from listing or changing your token?

we need to deploy a private business token with a fixed price for exclusive internal use (It is complicated to explain here in a few lines but it is related to workers' meals in restaurants). We want ...
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MetaMask showing 'transfer' method - How do I switch it to 'Smart Contract Interaction'?

I have a simple transaction set up to send 100 of my ERC20 token to a certain address. Please see the code below: if (window.ethereum) { await window.ethereum.request({ method: "...
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Integrate smart contract on backend (without metamask and wallet signing transaction)

i have a working dapp on frontend sending transactions and signing them through connected wallet (metamask). I want to transfert this logic of sending transactions to my backend (nodejs). so there ...
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How did I lose $80 in an ETH to DYP swap on Uniswap?

I swapped $786.37 worth of ETH for DYP and only received $705.86 worth DYP. The gas fee was only $2.77 so how did I lose $77.74 of value in the transaction?
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How to decode and update input data of a specific transaction?

So, I've decoded the input-data and fetched it via block-hash, Now what I want to do is that, I want to update the input data and post that updated input data back to the same transaction of the same ...
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Somebody wan to to send me eth tokens and asked me to send him fee first .. is this the normal way to do it?

Somebody wants to send me eth tokens and asked me to send him fees first .. is this the normal way to do it?
2 votes
2 answers
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How to read multiple destination transactions?

I have a system that read normal token transactions with the 0xa9059cbb method, but now I'm receiving transactions like this 0x5ed78dc97ed6c4a3797be99f04977bbcfd45ca5c0ae97ade16dce69e7ecc558a with ...
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Missing Eth after sending to contract

I tried following a tutorial on YT and my ETH has been missing. I keep on looking at the tos and froms but I can't seem to find where my ETH has been sent. This is the created contract address ...
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1 vote
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How to prove that a certain payment has been made by a certain user?

I have a website in the beta stage, on which users will be able to pay by crypto. Out of simplicity and for now, I want to use a single address and verify the payments manually because there won't be ...
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1 vote
1 answer
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Out of gas ethernaut lvl 10 - reentrance

I'm trying to solve Ethernaut level 10 reentrancy task, but I'm getting "out of gas" error. https://ethernaut.openzeppelin.com/level/0xe6BA07257a9321e755184FB2F995e0600E78c16D This is my ...
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How can I provide a user with an unsigned transaction that, when signed, sends their ether/ERC-20 tokens to another address?

I would like to create a dapp that provides an invoice like work flow. For example: Alice would like to buy 1 apple from Bob for 2DAI. How can Bob programmatically provide Alice a way to send the 2DAI?...
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How to correctly calculate the hash to sign of a transaction with Ethers? is "\x19Ethereum Signed Message:\n32" still necessary?

I am trying to get the public key of the sender from a signed transaction. I am getting the transaction information with the help of alchemy and quicknode. The response I get is a json object like ...
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brownie.exceptions.RPCRequestError: Encountered a ReadTimeout while requesting `debug_traceTransaction`. The local RPC client has likely crashed

I am testing a contract that requires interaction with other contracts, after writing the contracts and deploying when I send the initial transaction it successfully sends the transaction but the test ...
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Kademlia: How does Ethereum uses node discovery protocol to avoid sybil/eclipse attacks?

I want to describe a case that's not clear to me. let's say we have 10 peer validator nodes who reach consensus and agree to store some blocks on their chain. Let's say now that a wallet wants to sync ...
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ETH Transaction cancellation and overriding

Consider your transaction is pending in mempool for too long and you want it to be validated ASAP (I) or cancelled (II). I) AFAIK In this case you are suggested to make the same transaction again (...
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Using web3.py to build transactions for metamask

I building minting Dapp and I am using web3.py for ethereum interaction. When a user wants to mint, they make an API request to my flask backend, which builds a transaction and returns it. The client ...
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Transaction Effective Gas Price

I am developing in Go and I have a question that I have been looking for the solution for a long time and I am not able to find it. How can I find the effective gas price used in the transaction? Not ...
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unable to create a raw transaction

This is my deploy.js file where i created a raw transaction but when deployed on ganache the new block was created but there was not any console.log() in the terminal pls help me up with const ethers =...
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Speed requirement of Ethereum 2.0 node

It is said that Ethereum 2.0 will reach 100k TPS. Does it mean each node should be able to verify 100k transactions per second? Or the 100k transactions will be divided to 64 shards so each shard ...
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After minting 10,000 NFTs, how long does it take to finish pricing all of them?

I asked a question here but I think it's misunderstood. After minting 10,000 NFTs, how long does it take to finish pricing all of them? Is there a benefit to just mint NFTs without pricing them?
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Transaction status marks Success but don't have Tokens Transferred

when I checked some transactions I found sometimes transaction mark success but can't see any info like Token Transfer. In this case, do you know what type of this transaction ?
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Where can I find how the Ethereum protocol calculates transaction fees, supply issuance, and other key components?

I would like to learn how different components of the Ethereum protocol are calculated. Where can see how these and other elements? Is there a code database that a final code source that I can refer ...
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After minting 10,000 NFTs, do you list them for sale one by one? If so, then how long does it take to finish listing all of them? [closed]

After minting 10,000 NFTs, do you list them for sale one by one? If so, then how long does it take to finish listing all of them?
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How are Ethereum's transactions fees and issuance rate connected, if at all?

I keep hearing that one of the big advantages of moving to proof of stake is that transactions fees will be reduced. I also hear that Ethereum's issuance rate will decrease after the move to proof of ...

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