Questions tagged [addresses]

Addresses are the particulars of names, domains or accounts on the blockchain.

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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(...
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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; ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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() ...
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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-...
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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 ...
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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 ...
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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 ...
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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 ...
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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??
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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 ...
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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) ...
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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 ^...
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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 ...
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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.
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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 ...
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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?
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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; } ...
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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 ...
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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 ...
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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 ...
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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.
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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?
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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 ?
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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 ...
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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.
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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
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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 ...
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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: ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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(...
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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 ...
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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?
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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 ...
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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 ...
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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 ...