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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Reduce gas costs with longer block confirmation times (like in Bitcoin)

In Bitcoin, fees tend to decrease as you target longer block confirmation times. For example, a standard transaction with 1 input and 2 outputs has a fee of approx. $3.06 for confirmation within 6 ...
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Is minting gas through gastoken.io still efficient to reduce Ethereum gas costs?

A SE user suggested using https://gastoken.io to mint gas when fees are low in order to save on gas when fees are high. However, I'm wondering if there's any benefit of doing this today. According to ...
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Can a transaction hash be used to identify the sender of a payment?

A user suggested using a transaction hash as a way to track user deposits (especially for ECR20 tokens): The major issue arises when you start accepting erc-20 tokens as payment, in that case when ...
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ETH sent to wrong address

First time setup of my Ledger X nano: I wanted to send some ETH for gas to allow sending my CHAIN from Coinbase to my new ETH 1 account. Unfortunately I sent $30 worth of ETH for gas to the ETH 1 ...
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Is there “auto-drop” or “auto-cancel” for a transaction that's not been processed for a long time?

I sent a transaction with relatively low gas and during several days it was pending. Eventually I managed to have it to get through by increasing a gas fee. Other time I send a transaction with a low ...
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How can the transactions to this address always adapt to have higher gas price than all the rest?

Looking at the transactions from: https://explorer-mainnet.maticvigil.com/address/0xfD0E9d3f4Eee056B49DF062B70f766cFB13fEb01/transactions Looking at every block that a transactions is sent to this ...
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Transaction has been reverted by the EVM - How to deduce the revert reason in this case?

I get this error when I call a function that changes the state of the smart contract from the frontend: Error: Transaction has been reverted by the EVM: { "blockHash": "...
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Building TransactionRoot from a single transaction

I'm trying to follow through the trie construction for transaction data - and the multiple resources online seem quite conflicting! Let's consider transaction https://etherscan.io/tx/...
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Can't send a new transaction with a lower nonce while the previous one is still pending

Several days ago I sent a transcaction via MetaMask, to a different account of mine, with a gas fee of 30 gwei. It's still pending due to a fee being too low. A transaction contains all Eth in an ...
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How to get rid of “Gas estimation errored with the following message” in this case?

In my front-end, I try to call a function called endAuction. In endAuction, I transfer payment to a seller and participants. While calling it from the front-end the transaction fails without any ...
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What is the rationale behind lower minimum deposit & deposit fees for ECR20 Tokens vs Ethereum? [closed]

While examining the fee structure on Kraken I noticed the following peculiar pattern: Ethereum: Deposit Minimum: 0.05 ETH (approx. $61.99 at time of posting) Deposit Fee: Variable on-chain fee to ...
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Exchange deposits using smart contracts and externally owned accounts

While researching how different exchanges handle user deposits, I noticed a stark contrast between several prominent exchanges. Kraken: Exchanges like Kraken use newly generated deposit addresses (no ...
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The Real Cost to Foward Transaction to EOA via Smart Contract?

I'm creating a smart contract that does the following: Checks that a userID parameter is included as data field OR that the last 4 zeros of the amount being sent is not equal to zero (i.e, 0....
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Recover Lost Funds from Botched ETH Deposit Without Access to Private Keys?

I'm using the wei approach (4 right-most zeros) as a marker to track user deposits on my site. In short, every user on the site is told to append a custom amount of "wei" to every deposit ...
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What is the sequence of events when a transaction is made on Uniswap?

I elect to swap 100 UNI for 700 USDC on UniSwap, but with a low gas fee. In 1 hour, the price of 1 UNI has dropped significantly. would the pending transaction still swap for 700 USDC (as long as ...
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Racing condition when replacing transactions

I'm writing a bot that monitors a DeFi protocol for liquidation opportunities. The bot behaves like in the pseudo-code below: let pending_txs: []; for every_new_block in Ethereum { // Check the ...
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How to get the return value of a transaction instead of the transaction receipt in brownie

I have a function in my smart contract called getRandomNumer, and it returns a bytes32. However, in brownie, when I make a transaction it returns the transaction receipt. How do I get the return value?...
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How do I retrieve funds sent to wrong address that doesn’t exist [duplicate]

I sent some funds to my MEW wallet but I fat fingered the address and sent it to a different address that does not seem to exist. How do I claim that address to retrieve funds I see sitting in the ...
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Which component sends a transaction and which component subscribes to an event?

I am working on an ethereum project but I have some doubts. I have a backend that connects to the blockchain via web3.js. To connect to the blockchain I use a geth node. I understand that the sequence ...
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How can i update the status of the blockchian?

How can I update the status of the blockchian? I issue a transaction and pass an id to the smart contract. Smart contract A retrieves data from smart contract B and uses it to check whether a ...
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What node(s) does Ethereum broadcast a transaction first? How is it determined?

When I as a user make a transaction, where or what node(s) does it get sent to first? How does an Ethereum node, in terms of implementation details, determine that? Does it send a new transaction to, ...
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How to extract revert message from this specific object?

I have the follow error object that was caught in a catch statement Error: execution reverted: Auction owner is not authorized { "originalError": { "code": 3, "data&...
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If I send a transaction with a low gas fees and then send another one with high gas fee elsewhere?

Let's say, I send a transaction, all of my Ether, with low gas fees and it'll take hours for it to complete. Right away I send another one, from the same wallet or address, also all of my Ether, to ...
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smart contract transaction error [closed]

so in my earlier question asked, i stated i had accidentally sent some funds (674.2 VRS) well someone hacked me i guess.... but anyways some how "I" sent these funds to an unkown address and ...
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What is it that allows Ethereum process a larger amount of transctions per second than Bitcoin?

From a point of view of a developer: what is it that allows Ethereum process a larger amount of transactions per second than Bitcoin can? Is it more optimized polished code? Is it something on a more ...
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How to get Pending Transactions of specific contract?

Is there any way to get pending transactions of single contract instead of getting all pending transaction on node?
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1inch token swap to ETH resulted in 0 ETH [closed]

I did a token swap of OST -> ETH using 1inch (first time). I connected a Metamask Wallet, approved OST for swap & then executed the swap ( https://etherscan.io/tx/...
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Is their any change to move a wallet from an bnb blockchain to an ethereum blockchain?

I transferred some ethereum to my bnb wallet. Later I found out that this bnb wallet is not on the ethereum platform. So I send an amount of ETH to an address similar to the address of the bnb wallet (...
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What happens when you send a non-state-changing transaction to the transaction pool

I understand that there are 2 endpoints for smart contracts. Call() for running view/pure function and SendTransaction() for state-changing transactions. Obviously a state-changing transaction sent to ...
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what is the role of the wallet?

I'm working on an ethereum blockchain project where people want to make reservations in a city. I'm in this situatin I have many users booking, but I want all these bookings to be collected by a ...
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Why is sending ETH from multiple accounts in a single transaction deemed a “security hole”?

A user on Ethereum SE posted the following As you noticed, there is no way to send a single from multiple addresses. There is always just one sender. For Ether transfers the Ether value is always ...
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Send Multiple ECR20 Tokens from a Single ETH Address in One Transaction?

Is it possible to send multiple ECR20 tokens (i.e, USDT and USDC) from a single Ethereum address (EOA) to another address (EOA) in a single transaction (either with or without a smart contract)? If ...
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Is 21,000 Gas Limit Fixed Only for Ethereum?

I was reading a comment on another post on Ethereum SE and found the following statement: 21,000 is for sending Ether, not anything else. The user suggested to "just set it to a large enough ...
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Smart Contracts for the Blind Auctions

In blind auctions from solidity documentation what value should I insert under the bid function?Even I inserted string value,integer value under the bid function but it is showing the error as invalid ...
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Possible cause for the number of pending transactions decreases around every 3 hours

Curious, around every 3 hours, there is a drop in pending transactions. What could be the reason behind this? https://etherscan.io/chart/pendingtx
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Curve.fi deposit - Where is my money?

I just used Meta-Mask and funded the program with BUSD from my Binance account in order to test a deposition on curve.fi. Moreover, a small amount of ETH was transferred to Meta-Mask in order to cover ...
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Not received ETH to my wallet

Over 48h ago i sent 0.62840058 ETH from my Binance wallet to safex.world wallet but the assets still hasent came. Binance told me that they have successfully completed the transaction. But there is ...
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Pros & Cons of Using the “wei” Method to Track User Deposits in Ethereum

With Ethereum it's notoriously difficult to accept deposits from many users due high operational costs for making new ETH addresses. On the other hand, if all users of a service send ETH to one ...
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Calculating Ethereum Gas Fees

How are gas fees calculated in account based model coins like ETH? Let's say I own 10 ETH addresses with 0 starting balance. I receive 0.1 ETH payment from 10 people - each one sending a payment of 0....
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How to use web3 when one smart contract is interfacing with another?

A few months back I posted this question on this form. Since then, I've used the interface method to make my smart contracts interact together. I didn't have any problem while testing and developing ...
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Is it possible to have many users and one EOA? [closed]

I'm working on an ethereum blockchain project where people want to make reservations in a city. Is it possible to have many users who want to make a reservation but a single EOA that collects all the ...
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I am having an error when I interact with my smart contract

first of all here are the codes var web3 = new Web3(Web3.givenProvider); var contractInstance; var x = 0 $(document).ready(function() { window.ethereum.enable().then(function(accounts){ ...
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When is the transaction mined?

I'm working on an ethereum blockchain project where people want to make reservations in a city. My backend sends a transaction to the smart contract with the user id, city and other data. The smart ...
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Is it important to save the transaction ID in ethereum?

In Bitcoin, the data that you want to keep in the blockchain resides in the transactions so it is important to keep the transaction ID. Is it the same in Ethereum? Or is the data saved in smart ...
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Maximum GAS price

When I launch an Ethereum transaction, I have to choose how much WEI I am able to pay for one GAS. This is a "bid" concept: If my transaction is very important and if I want to run it ...
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How two untrusted parties can make transactions without any involvement of the third-party?

I'm trying to create a contract where where PartyA and PartyB had to trade. PartyA sends money to a contract and PartyB sends goods to partyA. After partyA receives the goods it allows PartyB to ...
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Make transactions free of charge for the user

I involved in a project that aims to create a token for public use (non blockchain familiar users). User will have an ERC20 token, but I don't want they to have ETH to pay the gas. One obvious ...
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Problem getting 'Normal' Transaction records from Etherscan.io API

I am using the "Get a list of 'Normal' Transactions By Address" method from the Etherscan.io API. The problem is that the results from the API are different than from results from the '...
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any 3rd party service that can get all transaction?

3rd party service recommended have any 3rd party service that can get all transaction of address? because from my research the web3 cant get the full transaction by account.
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Is it possible to analyze transaction with a smart contract by inputting a transaction ID? [duplicate]

EDIT: Alright, this is a duplicate: Can a contract view the details of a transaction, given a transaction id? Edit2: answer is either to oraclize or do the API call to, for example, etherscan: https://...

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