Questions tagged [addresses]
Addresses are the particulars of names, domains or accounts on the blockchain.
596
questions
0
votes
3answers
58 views
If I use a factory contract to create a new contract, does it show that the factory contract created it in the blockchain? [closed]
I am not sure if it would show my address or the factory contract's address (or both).
6
votes
1answer
386 views
Limit of address creation using single mnemonic
How many Ethereum address can be created using a single mnemonic for Ethereum using derivation path?
0
votes
1answer
89 views
If Wallet and address generated using EthHDWallet, can we get its recovery using ethereumjs-utils/hdkey getWallet() method by provideing seed?
Generated wallet address using:
let mnemonic = request.body.seed;
const wallet = EthHdWallet.fromMnemonic(mnemonic);
let address = wallet.generateAddresses(1);
console.log(wallet, address);
How can ...
0
votes
1answer
123 views
Why HD wallet instance returns two xpub-xpriv key pairs inside Root and HDKey?
I have implemented address generation using HDWallet as shown in the snippet below:
let Seed = generateMnemonic();
const wallet = EthHdWallet.fromMnemonic(Seed);
console.log("Wallet" + JSON....
1
vote
1answer
65 views
how to be notified about incoming transactions instantly?
I'm creating a platform which users are able to receive ETH on their own wallets (addresses). They will give the addresses to others, but the question is how can I be notified that new transactions ...
2
votes
1answer
1k views
Execute transaction Approve directly against contract address (without ABI)
Solved
For now, you will always need the ABI to execute a call against the ethereum network with web3. A simple way is to reconstruct the function you wish to execute is to, either create a separate ...
0
votes
1answer
63 views
Problem with understanding Buyer address
My account address on Remix IDE is 0xCA3…a733c and wallet address is 0x147…C160C. Following is my code obtained from Solidity Tutorial. In this code, buyer address is passed as an argument. I have got ...
0
votes
1answer
159 views
Difference between account, wallet and deployed addresses: Remix IDE & Code
When I am executing the program on the remix IDE (got from internet), it asks me the address, _wallet, which I am passing in the constructor. Remix IDE shows me 3 addresses: Account, Deploy _wallet ...
0
votes
1answer
303 views
Total Unique Addresses Count of Ethereum Classic
I need to find an API giving the total number of unique addresses used on the Ethereum Classic blockchain.
For example, the following API provides it for Ethereum: https://etherscan.io/chart/address
...
1
vote
1answer
46 views
tracing new address on new wallet in Ethereum [closed]
I am just wondering how the new addresses are anonymous in Ethereum. Suppose that I have a wallet A including many addresses on it. Then I have a new wallet, say wallet B, and opening new address on ...
1
vote
1answer
70 views
Which contract's address?
In Etherscan, it is easy to find a contract. For example here is an example:
https://etherscan.io/address/0x80fB784B7eD66730e8b1DBd9820aFD29931aab03#code
The web page says that the contract address ...
1
vote
2answers
61 views
How to find the coin/token type of crypto payer in Ethereum blockchain?
I'm new in Ethereum based crypto concepts. I would like to know how can I differ the incomming crypto amounts based on their orginal token type?
Imagine I have an address on Ethereum blockchain. ...
1
vote
3answers
5k views
Reinstalled MetaMask, account lost?
I had 3 accounts under my MetaMask Chrome extension. One of them had some small deposit. I have reinstalled the extension and used seed phrase to get access again. However, I can see only one account (...
0
votes
2answers
180 views
Correct ABI payload packaging to call another Contract's address
Let's suppose I have the two following contracts, Dest and Proxy:
pragma solidity ^0.5.0;
contract Dest {
function foo(string memory name, string memory symbol, uint256 decimals, uint256 ...
2
votes
1answer
58 views
Change a Checksum Address to Its Normal Hex Value
I know there are functions to convert hex address -> checksum address, but are there any to convert checksum address -> hex address?
2
votes
2answers
299 views
Is there any difference between address that have Smart Contract and “normal” one? [duplicate]
Is there any difference between address that have smart contract on it, and "normal" address (address that You can create private and public key pair)?
For more context, this is the problem I'm ...
2
votes
1answer
461 views
Is any 40 character hex string a valid ethereum address?
I know an ethereum address is generated by getting the last 20 bytes of the keccak-256 hash of the public key, which is 40 hex digits. I also know, an address does not need to have transactions ...
3
votes
0answers
20 views
How to calculate vanity address using C? [duplicate]
I have a curiosity about tacking on zeroes to strings, and Ethereum addresses are no exception. I wrote my own python program, and it was too slow. I wrote the program at https://pastebin.com/hTFGiKzR ...
1
vote
1answer
63 views
Different address make same signature for one message
Is it possible two different wallets (address) make the same signature for one message?
I have one message: '...
1
vote
0answers
19 views
Any idea how to add new contracts into drizzle react app using the address?
I have a react app which creates new contracts. lets say A creates B.
I have the addresses of the newly created contracts of B.
How do i add the newly created contracts of B using its address to ...
0
votes
0answers
730 views
Unable to Unlock Account Even After specifying allow-insecure-unlock
Software: Ubuntu on VirtualBox
Update, tried putting two dashes, on allow-insecure-unlock, doesn't work
solidity@solidity:~$ geth attach http://127.0.0.1:8545 --allow-insecure-unlock
Incorrect Usage:...
0
votes
1answer
200 views
invalid implicit conversion from contract to address requested contract
I am using this function to create a new contract instance of Match contract which takes 4 parameters.
However i am getting this error message "invalid implicit conversion from contract to address ...
0
votes
1answer
145 views
The method eth_sendTransaction does not exist/is not available - web3.py
I am trying to send data to the contract, but I am getting the following error:
The method eth_sendTransaction does not exist/is not available
This is the code:
from web3 import Web3
web3 = Web3(...
0
votes
1answer
226 views
Solidity. Concatenate and hash two strings
Hi all I need tho sha256 two strings. I am new to solidity. This is what I've got:
function addressToString(address _addr) public pure returns(string memory)
{
bytes32 value = bytes32(uint256(...
0
votes
1answer
31 views
Solidity. Concatenate hash w address. TypeError: Operator + not compatible with types string memory and address payable
I am trying to do something simple:
examsFinalHash = keccak256(examHash + msg.sender);
but I get the following error:
TypeError: Operator + not compatible with types string memory and
address ...
0
votes
1answer
170 views
Generating an address from a public key in C++
Example:
Input key = 0x025f37d20e5b18909361e0ead7ed17c69b417bee70746c9e9c2bcb1394d921d4ae
Output address = 0xd09D3103CcABfb769eDc3e9B01500Ca7241D470A
I have been using an algorithm from keccak-tiny....
0
votes
1answer
55 views
How can I implement redactable chain for ETH?
I am trying to research about Redactable blockchain so my question is how can I implement a Redactable chain in Eth if someone has some idea about it I will be thankful
3
votes
2answers
887 views
How to generate a new token for ERC1155?
Developing an ERC1155 contract, how to generate an address for a new token?
I need to create an API function like function createToken() returns (address). How?
Should I just use an incrementing-by-...
2
votes
0answers
245 views
Combine two addresses into one
I want Solidity code to define a function f that would map two Ethereum addresses A, B into a new address X = f(A,B) such that there is nearly zero probability that X is an already taken address (an ...
1
vote
1answer
93 views
Invalid opcode when trying to pass address as parameter to contract
When I try to pass address as parameter to this addEmployee function it gives me this error:
invalid opcode
The execution might have thrown.
Debug to get more information.
modifier onlyOwner(...
0
votes
1answer
63 views
TypeError: Type contract Campaign is not implicitly convertible to expected type address [closed]
pragma solidity ^0.5.11;
contract CampaignFactory {
address[] public deployedCampaigns;
function createCampaign(uint minimum) public {
address newCampaignAddress = new Campaign(...
0
votes
1answer
139 views
Solidity. How to add an address to a mapping
I have this:
contract Diary {
string[] private facts;
mapping (address => bool) approvedAddresses;
address owner;
constructor() public {
owner = msg.sender;
...
5
votes
2answers
1k views
Common Gas Wallet for ERC20 Wallets?
We have a wallet structure where users send tokens to individual user wallet addresses generated for them, we then sweep all the funds in the user's wallets to a centralized pool. The individual ...
2
votes
1answer
217 views
How to transfer wei from a contract to a specific address?
I was making an auction system and I wanted to make sure that when someone bid higher the contract would return the money to the address of the previous bid.
pragma solidity >=0.4.22 <0.6.0;
...
2
votes
3answers
668 views
How smart contract transactions work?
I read that smart contracts don’t have a private key, so they can’t sign a transaction. My question is: when a smart contract starts a transaction to an EOA, how are we sure that the smart contract ...
0
votes
1answer
113 views
Is there any API to create Addresss and wallet as well as make transfer for ETC (Ethereum Classic)?
There is balance checking, transaction list and transaction receipt getting APIs available for Ethereum Classic (ETC)?
Is ETC coin is only available on Ethereum Classic or its listed block explorer ...
0
votes
1answer
85 views
I would like to 3 mappings
I am a beginner.
I would like to 3 mappings
I know 2 mapping looks like this:
mapping (address => mapping (address => uint256)) public allowed;
and my question is: is 3 mappings look like ...
0
votes
1answer
55 views
Why does etherscan show such unusual results for the creation of this specific contract?
Normally, when I browse for the address of a specific contract and then click the contract-creation transaction label, I get:
To: [Contract 0x... Created]
For example, consider the BNB contract at ...
0
votes
1answer
51 views
ICAP 34 characters long. What's this kind of ICAP?
My understanding is that an ICAP address will have 33 characters for Direct or 35 characters for Basic, thus I've generated some 34 characters long ICAP addresses using:
helpeth keyGenerate
In ...
1
vote
2answers
114 views
How to check if an address is an active contract in Vyper?
Often for security reasons I want to limit certain address parameters to non-contract addresses for certain functions in my contracts, ie. there are no code stored on the addresses passed in as ...
0
votes
1answer
247 views
One smart contract deployed on 2 nodes will have same address?
Let's get creation of a smart contract address out of the way:
The address for an Ethereum contract is deterministically computed from the address of its creator (sender) and how many transactions ...
0
votes
1answer
50 views
Address Payable and New Contracts
The following compiles in 0.4.26, but not 0.5.0. The error is "Type contract CustList is not implicitly convertible to expected type address." I figure it's something with address payable, but I have ...
2
votes
1answer
269 views
How does EIP-55 prove a string is ACTUALLY a valid Ethereum address?
I wonder how EIP 55 check proves an address is actually an Ethereum address, or does it prove this at all?
Am I missing an obvious point in Vitalik's code below from EIP 55?
from ethereum import ...
2
votes
1answer
514 views
0x0000000000000000000000000000000000000000 address behaviour
I have a question about the possibly strange behaviours of address:
0x0000000000000000000000000000000000000000
We know that:
ETH + ERC20 tokens sent there are burnt
Upon creation of a new smart ...
1
vote
1answer
28 views
Scope Issue: Not successfully storing accounts after using web3.eth.getAccounts()
I am having trouble with the following code:
var accounts = []
let accounts = await web3.eth.getAccounts((error, result) => {
accounts = result;
console.log(accounts);
});
console.log(...
1
vote
1answer
40 views
Find keyfile of an account
I have several accounts in my Geth wallet. I need to locate the keystore file of a given account but there doesn't seem to be any connection between the keystore file names and the accounts. How do I ...
3
votes
1answer
1k views
Convert address to string after solidity 0.5.x
After solidity 0.5.x release none of conversions from address to string appear to be working. I've tested all of them on remix and got errors like converting bytes to uint or something like this.
...
1
vote
1answer
79 views
How can I send ether [duplicate]
Hey guys I am a beginer on Solidity. I write a function and try to send ether on remix accounts and check balances this accounts. But I can't connect accounts I think because when I check balance of ...
0
votes
2answers
1k views
Unused function parameter. Remove or comment out the variable name to silence this warning
I have a smart contact which have 2 owner address and 3 functions.
my set functions is set a users with msg.sender and my getUser functions is returns name,surname and age and I want to add a admin ...
0
votes
1answer
2k views
Member “name” not found or not visible after argument-dependent lookup in string storage ref
I have code like this and I want to set my name, surname and age in my struct so I want to set them and get them using with my functions
here's my code :
pragma solidity >=0.4.0 <0.7.0;
...
