All Questions
8 questions
2
votes
1
answer
551
views
Wait for incoming ethereum transactions and credit them after n confirmations
I'm trying to create a website where users can deposit ethereum. For my server I'm using node.js and express.js. I looked into web3.js but the docs are unclear to me and I don't know which functions ...
- 63
2
votes
1
answer
583
views
Transaction on Uniswap -- how to find out what pair is being swapped (via web3.js)?
Given a transaction on Uniswap,
how to find out what pair is being swapped, and the amount of it? Namely, via web3.js/ethers.js
Is there relevant and sufficient information in the fields of a ...
- 21
0
votes
1
answer
1k
views
How to send a replacement transaction with a higher gas price?
I am sending a transaction with sendSignedTransaction :
const tx = new Tx({
...
"gasPrice": web3.utils.toHex(41 * 1e9),
...
}
await web3.eth.sendSignedTransaction(serializedTx)
....
- 1,507
2
votes
1
answer
2k
views
How to get ethereum gasPrice from a transaction hash?
I need to get the gasUsed and gasPrice so that I can calculate the correct amount of gas required for a transaction.
I can get the gasUsed using:
var accountOneReceipt = await contractInstance....
- 372
0
votes
1
answer
292
views
Invalid JSON RPC Response with web3.eth.filter
I'm trying to retrieve all pending transactions by using web3.eth.filter given an address, but i always receive "Invalid JSON RPC Response "" ".
Web3 version is 0.20.6.
I'm using rinkeby testnet.
...
3
votes
2
answers
6k
views
Where can I find my pending transactions?
I wanted to know where I can find the current pending transaction for an account which isnt committed. Is it even possible? How can I get transaction hashes for transactions which are pending? Any API ...
- 108
2
votes
0
answers
564
views
Contract state and variable changes in pending transactions
I have a simple contract:
pragma solidity ^0.4.0;
contract Festival {
address owner;
uint8 max;
address[] entered;
function Festival(uint8 _max) {
max = _max;
owner ...
- 31
9
votes
4
answers
6k
views
Optimal way of waiting for transactions to be mined in geth
I'm currently checking if a transaction has been mined using the following function (using web3.js):
function waitForTx(tx_hash) {
var result = null;
// This is not really efficient ...
- 5,284