Questions tagged [addresses]
Addresses are the particulars of names, domains or accounts on the blockchain.
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Passing transaction origin address from one contract to another without use of tx.origin Solidity
I am currently working on a project that the user will buy/sell Contract A and receive another token from Contract B. Contract B is a crowdsale contract of a 0 value ERC20 token used as proof of ...
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push() Function not Working Solidity
//SPDX-License-Identifier:MIT
pragma solidity ^0.7.0;
import "./SimpleStorage.sol";
contract StroageFactory
{
address[] public SimpleStorageArray;
function createSimpleStorage() ...
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13
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Question about finding token addresses to insert into a .sol Contract function
Ok so I have a .sol Contract that is trying to find arb between 2 dexes
I'm utilizing the Kovan Test Network -
this is the function
function estimateDualDexTrade(address _router1, address _router2, ...
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1
answer
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We sometimes refer to ETH as `0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee` on Ethereum, what's the equivalence of BNB on BSC?
I see lots of contracts refer to ETH as 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee on Ethereum, since there's not a token contract for ETH itself. So I wonder if the equivalence on BNB Smart Chain, ...
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Web3.py create new account does not have "pre-fund" anymore?
I would like to ask, previously when creating the -> web3.eth.new.account to get Account[0] and I remember, that web3 does "Pre-Fund" the Account[0]? What is the command line? Or it does ...
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How to Air Drop rewards to NFT Holders?
How can you know which users are still holding your NFTs? What if someone Mints an NFT and then at some point they sell/transfer it to someone else? How would you go about updating the holders then ...
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19
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How to convert address to bytes in solidity? [duplicate]
I tried with this function, but it's not working, getting the same address input in output.
function toBytes(address a) public pure returns (bytes memory b){
assembly {
let m := mload(0x40)
a ...
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18
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How to send a "Address" from Javascript to Solidity Contract
Hi i have created frontend and working with web3js.
Now what i am trying to do is:
Updating the data in the contract.
Add the address in the contract (So here in form i am asking the user to put the ...
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How to bypass the openzeppelin-contracts Address.sol check and "tx.origin == _caller"
I am trying to create a smart contract for to mint NFT and token for security purpose, but I often got stuck with the contract checking, does anyone know if I can bypass those checking?
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What is the site that shows all the tokens I own in my Ethereum 0x... address across all other L2 EVM compatible chains?
Is there a site that shows all the tokens I own in my Ethereum address along with all the L2 EVM compatible chains?
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What happens when you send crypto to an address that does not exist in the network? [duplicate]
What happens when you send crypto to an address that does not exist in the network?
Let's say Ethereum address have the format of four numbers only like 1234 but I accidentally send some coins to and ...
- 1,333
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1
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Can a smart contract have multiple addresses?
Can a smart contract have multiple addresses? And I am not asking whether a smart contract can have other smart-contracts. What I am asking is, theoretically can a smart contract have multiple ...
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How to generate and remember, or to be able to deduce, the private keys of a few millions of addresses?
Goal: generate a few millions addresses and remember or store the private keys of each of them in an easy manner.
Using the most straighforward approach, that is, storing all of the addresses as &...
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Why there are people who want to have multi-accounts in Ethereum?
Why there are people who want to have multi-accounts in Ethereum?
I notice that in the Ethereum ecosystem, more and more people own more than one account, what motivates them to create more than one ...
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1
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43
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How to format hex string to solidity address?
Say I have a hex string c4ef705a8a8f2db126b92013b4938230df2158b5 how can I format it as a solidity address using ethers js or another npm package to prepend 0x and correctly capitalise some of the ...
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Solhint: Why should I avoid multiple calls of "send" in a single transaction?
function withdrawAll() public payable onlyOwner {
uint256 _each = address(this).balance / 4;
require(payable(t1).send(_each), "Account is being paid out");
require(payable(t2)....
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1
answer
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Solidity documentation: Are 39 or 41 digit long address literals allowed?
Solidity documentation here says that
Hexadecimal literals that are between 39 and 41 digits long and do not pass the checksum test produce an error.
Do they mean, "Hexadecimal literals that ...
- 41
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1
answer
30
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Only getting 'Promise { <pending> } when calling getPair on the Quickswap Factory contract with ethers.js?
I'm attempting to get the pair address of the WETH/DAI pair on Quickswap on the Mumbai test net.
I have this quick script:
const ethers = require('ethers');
const Big = require('big.js');
const PATH = ...
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1
answer
236
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Convert/cast an address to uint256
Following these details on the values that make part of the calldata that goes into an L2 message in Arbitrum:
https://developer.offchainlabs.com/docs/arbos_formats#l2-messages
How do you convert/...
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3
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The same wallet address on the Mainnet Ethereum network and on the Polygon network. Are these two different wallets with two different owners?
I want to transfer some matic (Polygon network) to an Ethereum wallet address I know. But I don't know the address of this wallet on the Polygon network, I know its address on the Ethereum Mainnet.
...
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Creating a hundreds of wallet addresses via Infura and the like - where will the private keys get stored?
Let's say I wanted to generate new wallet addresses for my users on regular basis. That is, if I was to create hundreds of new wallet addresses via REST API of Infura or a similar service, where would ...
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Creating a hundreds of wallet addresses via Infura and the like - where will the private keys get stored? [duplicate]
Let's say I wanted to generate new wallet addresses for my users on regular basis. That is, if I was to create hundreds of new wallet addresses via REST API of Infura or a similar service, where would ...
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How do I accept deposits and withdraw funds without additional GAS fees?
Our project is supposed to accept payments in Ethereum and some popular altcoins, and it would probably be a good option to install some kind of open source wallet on the server, in the sense of not ...
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1
answer
57
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BIP32 Extended Public Key Generate Ethereum Address
BIP32 Extended Public Key How can I generate an address with node js?
Is something like this possible
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1
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Weird problem with address(this).balance and gas
I have a very simple contract, something like this:
contract Test_Variable{
uint256 public variable;
constructor() {
variable = 100;
}
function balanceTest() public {
...
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30
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crawling last transactions
I am making a program to monitor who is sending ether to my wallet.
I thought I could get the most recent blocks this way, but the repoFactory was empty.
What could be the problem?
i want to crawl ...
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How do I get Ethereum contract address from Etherscan API?
I have followed the documentation supplied here under "Get a list of 'Normal' Transactions By Address" : https://docs.etherscan.io/api-endpoints/accounts#get-a-list-of-normal-transactions-by-...
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Investigating an incomplete ETH address with 6 words or less
When investigating an incomplete ETH address on Etherscan we can write the first words and the search bar then autocomplete the rest and lists addresses starting with these words. But it does that ...
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when using swapExactETHForTokens, setting address_to as address(this) causes the swap to fail why? Yet external wallets work
ive been working on my dapp, fairly new to solidity, im trying to make a smart contract that provides a interface to buy tokens from Uniswap using ETH and then send the tokens back to my smart ...
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1
answer
107
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Telling contracts from EOAs using ethers.js
I'm trying to figure out whether a given address is:
a contract
an EOA
unknown
I know that only contracts can have code. Therefore, provider.getCode(address) returning anything but 0x tells me ...
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1
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85
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Why is the method in receive() external payable{this.withdraw Funds();} not called in Solidity?
I wrote a smart contract that, when receiving money to my address, should automatically transfer 50% to the 1st wallet address, 25% to the second, 25% to the third.
For some reason it doesn't do it ...
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Problem in withdraw() function in Auction contract, !payable is used still its able to refund the amount of the lower bidders when we click withdraw
In Withdraw Function, !payable condition is given, but payable condition not given, still when we click withdraw, then we will get our money back if we dont have the highest bid
pragma solidity ^0.8.4;...
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1
answer
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Building a MERN app with ability to push image to Ethereum blockchain
I am building a simple app that is like instagram but want to give the user the ability to push their image to the ethereum blockchain combined with a MERN stack.
I do not want to use metamask for ...
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How to make it so that when money comes to the Metamask wallet, they are automatically redirected to this smart contract? [duplicate]
I wrote a smart contract on Solidity, which, when receiving money to its address, redirects 50% to the first wallet, 25% to the second wallet.
How to make it so that when money comes to the Metamask ...
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vote
1
answer
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How to transfer ethers from a contract to another SPECIFIC address?
I want to write a smart contract that, when receiving money, transfers 50% to a specific address of the first wallet (0x583031D1113aD414F02576BD6afaBfb302140225)
and transfers 25% to a specific ...
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1
answer
24
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I am trying to write a smart contract for a defy-Bank as a project. i can't figure out why hasTransfered() function not getting executed?
Smart contract code:
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
contract AddressWallets {
// variables
address owner;
uint funds;
bool transferFund;
...
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744
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How to get the list of all Ethereum addresses (with AND without balance)
In order to make a full analysis of Ethereum's blockchain, I need a list with all the Ethereum addresses ever appeared. The size of this file does not matter.
On internet I have only found the list ...
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30
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Short Ethereum addresses in base64
recently I was given a file with some (proposedly) Ethereum addresses in it.
To my suprise the addresses looked like this:
6W0uRUw0RbRbMAVaAH5iNWiTdzA=
Byu1WPliGqxo5VCIZ0XNXX1pqe8=
...
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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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Privilege for a list of addresses
I want to give free mints to people who owns an NFT from another collection. I can do it through importing interface of another contract and calling the balanceOf function with the related address, ...
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2
answers
435
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how to precalcuate the deployed contract address
// SPDX-License-Identifier: MIT
pragma solidity ^0.5.16;
import "https://github.com/Uniswap/v2-core/blob/master/contracts/UniswapV2Pair.sol";
contract TestERC20 {
address public _pair =...
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API for getting the total balance (net worth) of an address?
Etherscan can get the total net worth for all tokens of an address, ETH and ERC-20, e.g.:
https://etherscan.io/tokenholdings?a=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045
Other services like Zapper.fi ...
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return a struct from a mapping of addres-struct
I'm trying to return a struct called Trainer from a mapping of addresses -> Trainer
Is there any way to easily retrieve the Trainer struct from the trainersMap?
struct Trainer {
address owner;
...
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0
answers
112
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Getting tokenID from wallet address in ERC721
I'm fairly new to solidity and especially token contracts, so please correct me if I'm missing something obvious.
I am currently working on my own implementation of ERC721 token (using ...
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14
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Deleting elements in a mapping of mapping in Solidity
I'm using a Solidity mapping of mapping to manage associations between files and users in my application and deleting elements from it like this:
mapping(address => mapping(address => uint)) ...
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2
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48
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comparing addresses to determine "ownership" of a contract not working as expected
I am trying to write a function to determine if the address msg.sender is the same address as the wallet that deployed the contract. I know that this is typically done via the the OpenZeppelin Ownable ...
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1
answer
65
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Solidity Error :: "send" and "transfer" are only available for objects of type "address payable", not "address" [duplicate]
I'm getting error here :: "send" and "transfer" are only available for objects of type "address payable", not "address".
function pickWinner() public{
...
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22
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How to see number of wallet addresses on the Ethereum blockchain?
How to see number of wallet addresses on the Ethereum blockchain? Also list of all those wallets, or number of token contract addresses as opposed to wallets
- 963
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How to make wallet address start with 0x1111111? [duplicate]
The 1inch contract address is 0x11111112542D85B3EF69AE05771c2dCCff4fAa26 on Etherscan. How did they make it have all those 1's at the beginning when these hexadecimal names are usually randomly ...
- 963
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96
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I don't know where my Ethereum went, or what wallet I created... how can i transfer it to a new wallet?
Going back a few years I made a purchase that is visible in Etherscan. But I am clueless as to where it went, what I bought or where it is now? All I've realised is that I'm as naieve now as I was ...
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