Questions tagged [addresses]
Addresses are the particulars of names, domains or accounts on the blockchain.
474
questions
2
votes
1answer
3k views
How to generate private, public and ethereum addresses using web3.py?
I want to know the process of generating the keys for ethereum using web3.py. How to generate the keys if I install my ether node.
from web3 import Web3, HTTPProvider, IPCProvider
web3 = Web3(...
0
votes
1answer
79 views
(SOLIDITY) Address in mapping - BUG?
Original post:
Sorry I just found out this way it actually works. But the problem is when I trying to look up address manually, not by msg.sender.
Code:
mapping (address => uint) count;
...
0
votes
1answer
44 views
What should I share with my developer? [closed]
I have a stock exchange project that I hired to a developer. I'm okay with bitcoin but I am new to Ethereum. The developer is in the process of develop the Ether wallet. Like a regular stock market, I ...
1
vote
0answers
442 views
Whats going on with these mysterious ethereum addresses?
A while ago I found website ethersecret.com which turned out to be very interesting; it provides a search engine for ethereum private keys and their corresponding addresses and whether they hold any ...
0
votes
1answer
42 views
Paradox - I need two deployed contracts to refer to one another
I have two contracts. #1 creates tokens and sends them to my address. #2 does some other stuff.
'#1 contains a reference to, say, 0xMyAddress (known in advance, of course) in order to grant it ...
3
votes
1answer
3k views
What does address(0) mean? [duplicate]
Referring to this link: https://theethereum.wiki/w/index.php/ERC20_Token_Standard
looking at the last contract. (Line 130)
function totalSupply() public constant returns (uint) {
return ...
2
votes
1answer
252 views
convert padded topics address to valid address string
I am parsing some information from the topics array.
I receive 32bit padded addresses in some indexes. Is there a web3 utility function or useful helper method to get these back into normal sized ...
1
vote
1answer
1k views
Can I see an example of a payable function in practical use?
I would like to see an example of a function modified as payable in practice.
I would like for it to accept payment and hold the ether.
I would like to read another function in the same contract that ...
2
votes
1answer
50 views
Can I know an address on another blockchain that was generated with the same key as an ETH address?
Let's assume another blockchain (blockchain ATH) uses the same protocol to derive addresses from private keys as the one used by Ethereum.
If I see an ETH address then I know for sure that the ...
1
vote
0answers
25 views
How load out data from blockchain when it occupies too much space?
If the blockchain working long enough it fills the memory of the mining device, how to load out the data and then rerun the system?
and why does my mining device has different miner address every time ...
1
vote
1answer
530 views
Find the public key of any ethereum account (that hasn't signed a transaction)?
I need to find the public key of a list of Ethereum addresses. Is it possible to do this only with the transaction hash of one of their transactions? Per Get public key of any ethereum account the v, ...
1
vote
1answer
15 views
Address Not Getting Stored Correctly in State Variable?
I am trying to write a contract where the originator of the contract will offer a reward that can only be claimed by a different address that she or he specifies. To do that, I am trying to create ...
4
votes
3answers
157 views
Can a contract control another address?
Say I have control of addresses A and B, and I am writing contract C. When I deploy C on the blockchain, it will have it's own address, that can send and receive ether. But I want to have a method on ...
2
votes
3answers
1k views
How store ETH in a smart contract
The question it's How store Ether in a smart contract.
In first step, I try transfer the transaction value to the smartcontract address doing something y something like that:
function storeETH() ...
1
vote
4answers
431 views
How to implement a watching wallet for thousands/millions of addresses
I need to check for customers' deposits and need to scan for receiving transactions for those addresses for Ether and in next step ERC-20 tokens. What's the most efficient way to do this with go-...
5
votes
3answers
958 views
Get address from public key in Solidity
The address is the last 20 bytes of sha3(publicKey)
In Solidity, using assembly if needed, how could I splice the first 12 bytes from sha3(publicKey) and get the address? What I came up with runs out ...
2
votes
0answers
223 views
What exactly is an extended public/private key?
How do they differ per derivation level? For example is the extended public key of the master node equivalent for all intents and purposes as a depth 3 node's extended public key?
Therefor can I ...
1
vote
1answer
79 views
How is excepting ether from a smart contract different than from a regular address?
We are implementing an ethereum payment for our customers and need to decide between deposits to a smart contract or individual customer addresses. What are pros and cons? Is it possible to hide our ...
4
votes
4answers
57 views
Find source of funds
Is there an automated way to discover the source of funds that were sent to a specific address?
Theory: The EOS team releases 2m EOS tokens every 23 hours. See https://eos.io/instructions for more ...
0
votes
1answer
103 views
Wrong network used on metamask by mistake [duplicate]
I have bought some HUR tokens through metamask (transaction is confirmed) but cannot see the tokens in the wallet. I sent the ETH over main network, instead of rinkeby test network- what can i do??
3
votes
2answers
2k views
Get Balance History of address
In building an IONIC app, I am attempting to retrieve the historical balance of a single Ethereum address. I am currently not sure how far back I will need to go. I know that Etherscan.IO offers a web ...
6
votes
1answer
745 views
Why doesn't my private key's public key generate the correct public address?
Private Key: 9ccbcabf23e271183dbed503b43277f4c6eee9ac918cd6cda75ebb73ceb35c7d
Corresponding Public Address: 0xa73Fb234B1773ed7b115D18A1f0a15579bA2C1e1 (check for yourself on MyCrypto, for example)
...
0
votes
1answer
394 views
Track owner and price in Ethereum Pet Shop
I've been following along with the Ethereum Pet Shop tutorial, and I'm fascinated by how all of this works.
I have a few questions, though.
Before I get into it, here's the code:
pragma solidity ^...
3
votes
1answer
947 views
is it possible to have multiple address in the same account?
i mean : getting several payments from several addresses to the same account so i could send all the coins at once and not paying the fee for each transaction
i'm willing to run ETH Node if necessary
...
0
votes
1answer
292 views
Stolen coins and hacked wallets
How do I track down the owner of an address that stole my wallet. I have the address need to follow up. My coins show up in their wallet.
5
votes
2answers
770 views
How to track payments to contract
Can I track received payments to smart contract on a block explorer or do I need to run a contract method for this? I need the amount and payment identification information (I need to identify the ...
0
votes
3answers
835 views
Export all addresses with a balance above a certain number
Is there a way to find/export all addresses with a balance above a certain number in Ether?
Any service/API provider is available for above requirement?
0
votes
2answers
145 views
Contract function returns address?
Learning ethereum, I am hoping this is an easy one. I wrote a simple test contract
contract Mini{
uint balance;
// constructor
// runs once upon creation
function Mini(){
balance = 1000;
}
...
7
votes
2answers
875 views
What is the ENS-BurnAddress?
I stumbled upon this Ethereum address. Etherscan calls it the ENS-BurnAddress. Currently, the account holds more than $9,000,000 US. My guess is that this is used to impose a cost on each bid so ...
0
votes
1answer
4k views
Multiple addresses on Metamask
First of congrats for the great work in the forum! I´ve tried to avoid posting but I can´t find the solution to my problem, this is causing me lots of stress and I really don´t know what else to do ...
0
votes
3answers
3k views
Web3j generate new address in a wallet
I'm using Java (web3j). I have some users and I want to give address to each user. How to generate new address in an ethereum wallet? For example I can generate lots of address from bitcoin wallet. Is ...
2
votes
1answer
2k views
What is an Ethereum address?
I am being asked to enter my Ethereum address, but I don't know what to put there and I already created an Ethereum account.
0
votes
1answer
115 views
How to know if a particular ethereum address is receiving a transaction? [duplicate]
Is it possible to determine if an ethereum address is receving a payment for example?
0
votes
1answer
649 views
How to create cool ethereum wallet address? [duplicate]
Someone was receiving payment to a cool ethereum address kind of
0x00000000000000000000000000002448
How to create such address ? could that be a wallet or contract ?
0
votes
3answers
59 views
How to let an ethereum address reveal its private key when it detects specific contract conditions?
1. Is this even possible? Can an ethereum address be programmed to do something when certain blockchain conditions are met? All without relying on a 3rd-party to have to observe the blockchain and ...
1
vote
1answer
43 views
I transferred coins to an address that belongs to ETH wallet instead of ETC [duplicate]
I have a problem. so, Ask for help.
by mistake, I transferred coins to an address that belongs to ETH wallet instead of ETC.
Is ther a solution for this?
Pleas, see below.
1
vote
2answers
608 views
Resetting address variables
How do you reset an address variable in Solidity? You cannot assign it Null or 0 but I want to be able to "deassign" an address somehow. Any ideas?
3
votes
1answer
1k views
Ethereum wallet address creation limit and ether storage limit/capacity per address
I am new to Ethereum.
I would like to know
How many addresses can you create in an Ethereum wallet (limit)?
Meaning is it 1K, 10K or 100K addressees you can create in a Ethereum wallet
What is the ...
1
vote
1answer
123 views
Same contract created twice (0xfec94608dea1f3609e4a93e56e01477d8a86de46)
While browsing traces generated by parity I encountered an interesting case:
Contract 0xfec94608dea1f3609e4a93e56e01477d8a86de46 has been created twice.
First time, in the transaction: ...
1
vote
1answer
637 views
How does a node generate an address?
I am playing around with geth to understand the principles of the ethereum network. One thing I keep asking myself is how does a public address get created?
For example, you can run an offline ...
0
votes
3answers
1k views
Get all TOKEN transactions by address
Given the address of a token, how I can get all the transactions related to that address using JSON RPC or an external api such a api.etherscan.io?
The transactions that gives a Ethereum address are ...
1
vote
0answers
151 views
Mist main wallet address changed after instalation
During the instalation of mist on a mac I get to the following screen:
I then have to wait for synching to complete. During this time I can deposit ether into my wallet using Bitcoin or just use the ...
0
votes
1answer
546 views
How can I make a transaction go to a random address in Solidity?
I want to write a cryptocurrency that has a feature that sends tokens from the sender to a random receipient address that has made a transaction recently on the blockchain.
How would I start off doing ...
1
vote
0answers
297 views
I accidentally sent the same transaction twice because it was pending
I seem to have gotten myself in a bit of a pickle. I sent some ether to another one of my wallets. The gas price was too low and it was pending for hours.
I read online that if you send the same ...
0
votes
1answer
392 views
Cannot compare 2 addresses in solidity code
Why do the results differ in the following:
truffle(development)> l.ownerOf(t) == l.ownerOf(t)
false
truffle(development)> l.ownerOf(t) != l.ownerOf(t)
true
Another version:
truffle(...
0
votes
1answer
177 views
Creating an offline address creator for Ethereum
I found this Bitcoin Paper Wallet: https://bitcoinpaperwallet.com/bitcoinpaperwallet/generate-wallet.html
I would like to add it Ethereum just for fun.
On this question, they show how to create ...
0
votes
1answer
449 views
Recover Ethereum holding sent to wrong address due to entry error
I attempted to transfer my Etererum holdings from Bitcoin to an address and entered a wrong digit in the address. Coinbase shows transaction complete. How can I recover?
1
vote
0answers
431 views
MyEtherWallet - address doesn't match
Well, I'm pretty certain I' screwed, but I figured I'd ask for help just in case.
I created one, and only one wallet on MEW. I was meticulous about saving my Private Key and address correctly. I ...
0
votes
0answers
27 views
Creating address and getting public address from private [duplicate]
Just for learning I am trying, using javascript & ethereum, to create an address and get public key from private key without using a library like web3.
Anyone has tried to do this? any resources ...
1
vote
1answer
434 views
C# - Convert Ethereum ABI Address To String (Solidity)
I'm new to Ethereum so please excuse my ignorance. Ethereum seems to have an ABI serialization protocol called Solidity. The spec is here:
https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI
...
